JP2013078238A - Power supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply system that can achieve a free-position configuration without contacting, the power supply system being capable of forming a resonance circuit only within a necessary range and flowing current.SOLUTION: There is provided a power supply system 1 that supplies AC power supplied from an AC power source 6 from a power supply body 3 arranged in a power supply region 2 to a load 7 through a power supplied body 5 arranged in a power supplied region 4. The power supply body 3 includes a power transmission part 9 which supplies the AC power supplied from the AC power source 6 to the power supplied body 5. The power supplied body 5 includes a power reception part 10 which receives and supplies the AC power supplied from the power transmission part 9 to the load 7, and a capacity induction part 11 which is constituted as a part of the power reception part 10 or differently from the power reception part 10. The power transmission part 9 and capacity induction part 11 are arranged opposite each other without being in contact so as to induce capacitor capacitance 14 at the power transmission part 9.

Description

  The present invention relates to a power supply system for supplying power to various loads.

  In general, a power supply system that supplies power to various loads generally includes a contact-type power supply system that supplies power by bringing an electrode of a power supply body and an electrode of a power-supplied body into contact with each other and the power supply system. It can be broadly classified into a non-contact type power supply system that supplies power without being in contact with the power source.

  Among these, the present inventors have proposed a power supply system using series resonance as a non-contact power supply system (see Patent Document 1). FIG. 22 is a circuit diagram of such a conventional power supply system. In this power supply system, the fixed body 101 arranged in the power supply region 100 includes power transmission electrodes 105 and 106. In addition, the movable body 103 disposed in the power supplied region 102 includes power receiving electrodes 107 and 108 that are disposed to face the power transmitting electrodes 105 and 106 in a non-contact manner. A coupling capacitor 109 is constituted by the power transmitting electrodes 105 and 106 and the power receiving electrodes 107 and 108 opposed to each other. The coupling capacitor 109 and the coil 110 provided on the movable body 103 form a series resonance circuit, and the resonance frequency is controlled from the AC power supply 115 to the resonance frequency by switching the frequency of the AC power supply 115. It becomes possible to supply power in a state. In this power supply system, the power receiving electrodes 107 and 108 are formed to be sufficiently smaller than the interval between the power transmitting electrodes 105 and 106 so as not to cross between the power transmitting electrode 105 and the power transmitting electrode 106. The

  However, in the power supply system described in Patent Document 1, the power receiving electrodes 107 and 108 and the power transmitting electrodes 105 and 106 are not arranged at positions that completely correspond to each other in the vertical direction depending on the arrangement position of the movable body 103. In some cases, the power receiving electrodes 107 and 108 are arranged so as to cover only a part of the power transmitting electrodes 105 and 106. In this case, the capacitor capacity of the coupling capacitor 109 is deviated from a predetermined capacity, and a predetermined series resonance condition is not satisfied, so that there is a possibility that power transmission efficiency may be reduced.

  For this reason, the inventors of the present application have proposed a non-contact power supply system using parallel resonance instead of series resonance (see Patent Document 2). FIG. 23 is a circuit diagram of such a conventional power supply system. In this power supply system, an inductor 120 and a capacitor 121 are connected in parallel to the power transmission electrodes 105 and 106, and a parallel resonant circuit is formed by the inductor 120, the capacitor 121, and the coupling capacitor 109. It becomes possible to supply power to the movable body 103 in a resonance state. In particular, since the impedance of the load portion can be increased, a voltage drop in the coupling capacitor 109 can be reduced, and stable power supply can be achieved regardless of fluctuations in the capacitance of the coupling capacitor 109. Also in this power supply system, the power receiving electrode 107 is formed to be sufficiently smaller than the interval between the power transmitting electrodes 105 and 106 so as not to cross between the power transmitting electrode 105 and the power transmitting electrode 106. .

JP 2009-89520 A JP 2010-193692 A

  However, the power supply system described in Patent Document 2 includes an inductor and a capacitor connected in parallel to each of the power transmission electrodes. When the power transmission electrodes are arranged in a wide range, the power supply system includes the wide range of power transmission electrodes. Since the current of the resonance circuit flows to the power supply, there is a problem that the capacity of the power supply becomes extremely large.

  In view of such a point, the present invention is a power supply system that can achieve a free position by non-contact, and is a power supply system that can form a resonance circuit only in a necessary range and flow current. The purpose is to provide.

  In order to solve the above-described problems and achieve the object, the power supply system according to claim 1 is configured such that the power supply body arranged in the power supply area passes through the power supply body arranged in the power supply area. A power supply system for supplying AC power supplied from a predetermined AC power source to a predetermined load, wherein the power supply unit supplies AC power supplied from the AC power source to the power supply. A power transmission means for supplying power to the body, wherein the power receiver is configured to receive AC power supplied from the power transmission means and supply the AC power to the load; and a part of the power reception means or the power reception A capacity inducing means configured differently from the means, and through a mutual boundary surface between the power supply area and the power supplied area, a plurality of parts of the power transmission means and a plurality of parts of the power receiving means The A plurality of coupling capacitors are formed by disposing each other in a non-contact manner, and the power transmission means and the capacity inducing means are disposed in a non-contact manner via the boundary surface. , Inducing a capacitor capacity in the power transmission means, and supplying power from the power supply body through the power supplied body through a resonance circuit including at least the capacitor capacity and the plurality of coupling capacitors It is possible.

  A power supply system according to a second aspect is the power supply system according to the first aspect, wherein the power transmission means is disposed in a vicinity of a boundary surface between the power supply area and the power supplied area. The power supply body includes a plurality of power transmission electrodes that receive supply of AC power from the AC power source, and the power supply body is connected to at least one of the first power transmission electrode and the second power transmission electrode among the plurality of power transmission electrodes. The power receiving means includes a plurality of power receiving electrodes arranged in a non-contact manner across the boundary surface with respect to the plurality of power transmitting electrodes, and the capacitance inducing means includes a plurality of power receiving electrodes. The first coupling capacitor is formed by forming a part of the plurality of power receiving electrodes so as to face a part of the power receiving electrodes of the plurality of power receiving electrodes. Among the plurality of power receiving electrodes, the second power transmitting electrode adjacent to the first power transmitting electrode among the plurality of power receiving electrodes is different from the part of the power receiving electrodes that is different from the part of the power receiving electrodes. By forming the second coupling capacitor by making the power receiving electrodes face each other, the first power transmitting electrode or the plurality of power receiving electrodes among the plurality of power receiving electrodes so as to straddle between the first power transmitting electrode and the second power transmitting electrode. By positioning the capacity inducing means as a power receiving electrode different from the power receiving electrode opposed to the second power transmitting electrode, the capacitor capacity is induced between the first power transmitting electrode and the second power transmitting electrode, Via the resonance circuit including the first coupling capacitor, the second coupling capacitor, the inductor, and the capacitor capacitance, or including the inductor and the capacitor capacitance Wherein the resonant circuit formed through the first coupling capacitor and the second coupling capacitor is obtained by enabling supplying power from the power supply member through said power-receiving member.

  A power supply system according to a third aspect is the power supply system according to the first or second aspect, wherein the power transmission means is disposed in a vicinity of a boundary surface between the power supply region and the power supplied region. The power supply body includes a plurality of power transmission electrodes that receive supply of AC power from the AC power source, and the power supply body is at least one of the first power transmission electrode and the second power transmission electrode among the plurality of power transmission electrodes. The power receiving means includes a plurality of power receiving electrodes arranged in contact with the plurality of power transmitting electrodes across the boundary surface, and the capacitance inducing means includes the plurality of power receiving electrodes. In addition to a part of the electrode, or instead of the plurality of power receiving electrodes, a capacitor inducing electrode is arranged so that at least a part of the electrode straddles between the first power transmitting electrode and the second power transmitting electrode. A first coupling capacitor is formed by causing a part of the power receiving electrodes in the plurality of power receiving electrodes to face the first power transmitting electrode in the plurality of power transmitting electrodes, The second power transmitting electrode adjacent to the first power transmitting electrode is provided with another part of the plurality of power receiving electrodes which is different from the part of the power receiving electrodes opposed to the first power transmitting electrode. By forming the second coupling capacitor to face each other and positioning the capacitance inducing means so as to straddle between the first power transmission electrode and the second power transmission electrode, the first power transmission electrode and the first power transmission electrode Inducing the capacitor capacitance between two power transmission electrodes, via the resonance circuit configured to include the first coupling capacitor, the second coupling capacitor, the inductor, and the capacitor capacitance, or before Power can be supplied from the power supply body through the power supplied body via the resonance circuit including the inductor and the capacitor capacity, and the first coupling capacitor and the second coupling capacitor. did.

  A power supply system according to a fourth aspect is the power supply system according to the third aspect, wherein the plurality of power reception electrodes are arranged in parallel in a power reception plane parallel to the boundary surface in an insulated state. The capacitance inducing electrode is a flat body disposed in the power receiving plane, and has a hole in a region corresponding to each of the plurality of power receiving electrodes. It is formed as a plate-like body that is interposed between the power receiving electrode in an insulated state.

  The power supply system according to claim 5 is the power supply system according to claim 3, wherein the plurality of power receiving electrodes are arranged in parallel in a power receiving plane parallel to the boundary surface in an insulated state. The capacitance inducing electrode is a plate-like body at least partially disposed in a plane parallel to the boundary surface and further away from the boundary surface than the power receiving plane, and the plurality of power receiving electrodes And having a hole in a region corresponding to the line connected to the wire, and formed as a flat plate disposed in an insulated state with respect to the plurality of power receiving electrodes.

  The power supply system according to claim 6 is the power supply system according to any one of claims 2 to 5, wherein the plurality of power transmission electrodes are formed in the same shape with respect to the boundary surface. In parallel power transmission planes, a plurality of rows are insulated from each other so that the polarities are alternately different along a predetermined first direction and a second direction orthogonal to the first direction in the power transmission plane. They are arranged side by side.

  A power supply system according to a seventh aspect is the power supply system according to the sixth aspect, wherein the plurality of power receiving electrodes have a shape wider than a mutual interval between the plurality of power transmission electrodes and have the same shape. In a power receiving plane that is formed parallel to the boundary surface, a plurality of insulating layers are insulated from each other along a predetermined first direction and a second direction orthogonal to the first direction in the power receiving plane. They are arranged side by side.

  The power supply system according to claim 8 is the power supply system according to any one of claims 2 to 7, wherein the power transmission electrode is formed of a magnetic material, and the power reception electrode is formed of a soft conductive material. The power receiving electrode and a magnetic material to be attracted are arranged on the surface of the power receiving electrode opposite to the boundary surface.

  The power supply system according to claim 9 is the power supply system according to any one of claims 1 to 8, wherein the power supply body includes power transmission side communication means, and the power supplied body includes A power receiving-side communication unit that communicates with the power transmitting-side communication unit is provided through a part in which a plurality of parts of the power transmitting unit and a plurality of parts of the power receiving unit are arranged to face each other in a non-contact manner.

  The power supplied body according to claim 10 is a power supplied body arranged in the power supplied area, and an alternating current supplied from a predetermined AC power source via the power supply body arranged in the power supply area. In a power supply body that supplies power to a predetermined load, a power receiving means that receives AC power supplied from a power transmission means provided in the power supply body and supplies the AC power to the load; and one of the power receiving means A capacity inducing unit configured as a part or different from the power receiving unit, and through a mutual boundary surface between the power supply region and the power supplied region, a plurality of parts of the power transmission unit A plurality of coupling capacitors are formed by disposing a plurality of portions of the power receiving means in a non-contact manner with each other, and the power transmitting means and the capacity inducing means are not in contact with each other via the boundary surface. Condition By disposing the capacitor, the power transmission means induces a capacitor capacity, and power can be supplied from the power supply body via a resonance circuit including at least the capacitor capacity and the plurality of coupling capacitors. Is.

  According to the power supply system of claim 1, the capacitor capacity is induced in the power transmission means of the power supply body by the capacity induction means of the power supplied body, and the resonance circuit is configured using the capacitor capacity, thereby Power can be supplied via the resonance circuit only at the position where the supply target is placed, and a non-contact free position can be achieved. In addition, a resonance circuit can be formed only in the required range to pass current. become. In addition, since it is not necessary to arrange a capacitor for the resonance circuit in the power supply body, the configuration of the power supply body can be simplified.

  According to the power supply system of the second aspect, since the capacity inducing means is configured as a part of the plurality of power receiving electrodes, it is not necessary to provide the capacity inducing means separately from the plurality of power receiving electrodes. The configuration can be simplified.

  According to the power supply system of claim 3, since the capacity inducing means is configured as a capacity inducing electrode in addition to or in place of a part of the plurality of power receiving electrodes, Capacitance induction electrode can always be straddled with respect to the first power transmission electrode and the second power transmission electrode, a large capacitor capacity can be stably induced, and the parallel resonance condition can be stably maintained. Therefore, it is possible to increase the power supply efficiency. Furthermore, since a large capacitor capacity can be induced stably, the inductor can be made small.

  According to the power supply system of the fourth aspect, the capacity inducing electrode is a flat body disposed in the power receiving plane, and has a hole in a region corresponding to each of the plurality of power receiving electrodes. Thus, the electrode for capacity induction over a wide area is formed by forming a hole in one plate-like body. It can be manufactured easily.

  According to the power supply system of claim 5, the capacitance-inducing electrode is a flat body in which at least a part is disposed in a plane parallel to the boundary surface and farther from the boundary surface than the power receiving plane. And has a hole in a region corresponding to a line connected to a plurality of power receiving electrodes, and is formed as a flat plate disposed in an insulated state with respect to the plurality of power receiving electrodes. By forming the hole in the flat plate-like body, a capacity inducing electrode over a wide area can be easily manufactured. In particular, since the hole can be made smaller than in the case where a flat body is interposed between the plurality of power receiving electrodes, the resistance of the capacitance inducing electrode can be reduced.

  According to the power supply system of claim 6, since the plurality of power transmission electrodes are arranged in parallel with each other in a mutually insulated state so that the polarities are alternately different along the first direction and the second direction, It is possible to supply power by moving the power supply object in both the first direction and the second direction, and it is possible to realize a free position in a two-dimensional region.

  According to the power supply system of the seventh aspect, since the plurality of power receiving electrodes are arranged in parallel in the first direction and the second direction in a plurality of rows in a mutually insulated state, the first direction and the second direction It is possible to supply power by moving the power supply object in any direction, and it is possible to realize a free position in a two-dimensional region.

  According to the power supply system of claim 8, the power transmission electrode is formed of a magnetic material, the power reception electrode is formed of a soft conductive material, and the power transmission electrode and the suction surface are disposed on a surface opposite to the boundary surface of the power reception electrode. Even if there is a low smoothness of the surface close to the boundary surface of the power receiving electrode or a gas or liquid has entered between the power receiving electrode and the boundary surface, Since the power reception electrode is pressed toward the power transmission electrode by the attractive force, the mutual distance between the power reception electrode and the power transmission electrode is stabilized.

  According to the power supply system of the ninth aspect, the power supply body includes the power transmission side communication means, and the power supplied body includes the power reception side communication means. Therefore, between the power supply body and the power supplied body. Communication can be performed, and adjustment for maintaining the resonance condition can be performed.

  According to the power supplied body of claim 10, by inducing the capacitor capacity in the power transmission means of the power supply body by the capacity inducing means, and configuring the resonance circuit using this capacitor capacity, the power supplied body is Electric power can be supplied via the resonance circuit only at the position where it is arranged, and a non-contact free position can be achieved. In addition, a resonance circuit can be formed only in a necessary range to allow current to flow. In addition, since it is not necessary to arrange a capacitor for the resonance circuit in the power supply body, the configuration of the power supply body can be simplified.

It is a block diagram for demonstrating the basic concept of the electric power supply system which concerns on each embodiment of this invention. 1 is a perspective view of a power supply system according to Embodiment 1. FIG. 2 is a circuit diagram of a power supply body and a power supplied body according to Embodiment 1. FIG. It is a top view of a plurality of power transmission electrodes and a plurality of power reception electrodes. It is the elements on larger scale of the periphery of the power transmission electrode and power receiving electrode in FIG. FIG. 6 is an enlarged view of a region X in FIG. 5. It is a conceptual diagram for demonstrating capacitor capacity. FIG. 6 is a circuit diagram of a power supply body and a power supplied body according to Embodiment 2. It is a top view of a plurality of power transmission electrodes and a plurality of power reception electrodes. FIG. 10 is a partial perspective view illustrating a state where a plurality of power receiving electrodes are excluded from FIG. 9. It is an enlarged view of the periphery of the power transmission electrode and power receiving electrode in FIG. It is a conceptual diagram for demonstrating capacitor capacity. FIG. 5 is a circuit diagram of a power supply body and a power supplied body according to Embodiment 3. It is a circuit diagram of the electric power supply body which concerns on a modification. It is a top view of the power receiving part manufactured using FPC. It is an enlarged view of the periphery of the power transmission electrode and power receiving electrode which concern on a modification. It is an enlarged view of the periphery of the power transmission electrode and power receiving electrode which concern on another modification. It is an enlarged view of the periphery of the power transmission electrode and power receiving electrode which concern on another modification. It is a top view of a plurality of power transmission electrodes and a plurality of power reception electrodes concerning other modifications. It is a top view of a plurality of power transmission electrodes and a plurality of power reception electrodes concerning other modifications. It is a top view of a plurality of power transmission electrodes concerning other modifications. It is a circuit diagram of the fixed body and movable body which concern on the conventional electric power supply system. It is a circuit diagram of the fixed body and movable body which concern on the other conventional power supply system.

  Hereinafter, embodiments of a power supply system and a power supply object according to the present invention will be described in detail with reference to the accompanying drawings. First, [I] the basic concept common to each embodiment was explained, then [II] the specific contents of each embodiment were explained, and [III] finally, a modification to each embodiment was explained. To do. However, the present invention is not limited by these embodiments.

[I] Basic concept common to the embodiments First, the basic concept common to the power supply systems according to the embodiments will be described. FIG. 1 is a block diagram for explaining the basic concept of the power supply system. As shown in FIG. 1, a power supply system 1 includes a predetermined AC power supply from a power supply body 3 disposed in a power supply area 2 via a power supply body 5 disposed in a power supply area 4. 6 is configured as a system for supplying AC power supplied from 6 to a predetermined load 7.

  The specific configuration of the “power supply area” 2 and the “power supply area” 4 is arbitrary, for example, an internal space of a building such as a general house or an office building, an internal space of a vehicle such as a train or an airplane, or Including outdoor space. Hereinafter, a surface that partitions the power supply region 2 and the power supplied region 4 from each other is referred to as a “boundary surface” 8. For example, when the power supply area 4 is a living room of a building and the power supply area 2 is a floor portion of the living room, the upper surface (floor surface) of the floor portion becomes the boundary surface 8. However, the power supply area 2 may be set upward with respect to the boundary surface 8 and the power supplied area 4 may be set downward. Alternatively, the boundary surface 8 may be set as a vertical surface or an inclined surface.

  The “power supply body” 3 includes a power transmission unit 9 as power transmission means for supplying the AC power supplied from the AC power supply 6 to the power supplied body 5. The power supply body 3 is arranged in the power supply area 2, but is not limited to a fixed body that is permanently fixed to the power supply area 2 so as not to move, and is removed from the power supply area 2 when not in use. And those that can be moved to an arbitrary position inside the power supply area 2. Examples of the power supply body 3 that is fixed so as not to move include the power supply body 3 embedded in the ground of a desk lamp in order to supply power to an automobile. Examples of the movable power supply body 3 include a power supply body 3 placed at an arbitrary position on a table in order to supply power to an electronic device such as a mobile phone. In addition, even if it is the power supply body 3 fixed so that it cannot move, the whole power supply body 3 is not limited to what is always fixed, For example, the position of the one part component of the power supply body 3 is set. The thing which can change the relative positional relationship of the said component and the electric power supplied body 5 is included by adjusting as needed. As such a power supply body 3, for example, it is a power supply body 3 embedded in the ground of a desk lamp in order to supply power to an automobile, and only a power transmission electrode 36 (to be described later) can be moved up and down. Thus, the power supply body 3 that can adjust the mutual distance between the power transmission electrode 36 and a power reception electrode 43 (described later) of the automobile can be exemplified.

  The “AC power source” 6 is a source of AC power, and is provided inside the power supply body 3 (in the case shown in FIG. 1) or provided outside the power supply body 3 and does not show AC power. In some cases, the power supply body 5 is supplied via a line or the like (not shown). In the example shown in FIG. 1, one AC power supply 6 is provided for one power supply body 3, but a plurality of AC power supplies 6 may be provided for one power supply body 3, or a plurality of power supply bodies may be provided. Alternatively, power may be supplied from one AC power source 6 common to 3.

  The “power supplied body” 5 is configured as a power receiving unit 10 that receives AC power supplied from the power transmitting unit and supplies the AC power to the load 7, and a part of the power receiving unit 10. And a capacity inducing section 11 as capacity inducing means configured as a different one. The power supplied body 5 is used by being fixedly disposed in the power supplied area 4 (stationary body), and moves autonomously or otherwise in the power supplied area 4 as necessary. (Movable body, moving body). The function and specific configuration of the power supply body 5 are arbitrary except for special points. For example, the stationary body can include a device such as a home appliance, and the movable body can be a power strip, a notebook, or the like. A computer, a mobile phone, a robot, or an electric vehicle. At least one power supply body 5 is disposed for one power supply body 3, and two or more power supply bodies 5 are disposed as necessary.

  The “load” 7 is an AC power supply target, and is provided inside the power supplied body 5 (in the case shown in FIG. 1) and provided outside the power supplied body 5 (illustration is omitted). ) The function and specific configuration of the load 7 are arbitrary except for special points, but the load 7 provided in the power supplied body 5 is provided in the home appliance or robot as the power supplied body 5. Examples of the load 7 provided outside the power supplied body 5 include a motor connected to a power tap provided on the power supplied body 5. In the latter case, the power supplied body 5 and the load 7 are connected to each other via a line or another power supply system. The load 7 is not limited to a power consumption source, and may be one that accumulates power, for example, like a storage battery. Note that the boundary between the power supplied body 5 and the load 7 is not necessarily clear. For example, when AC power is consumed by impedance other than the electric motor inside the power supplied body 5, Impedance may be included as part of the load 7. At least one load 7 is arranged with respect to one power supplied body 5, and two or more are arranged as necessary.

  The power supply system 1 configured as described above supplies power from the power supply body 3 to the power supplied body 5 in a contactless manner. This non-contact power supply is generally performed using a capacitor arranged via the boundary surface 8. That is, by arranging a plurality of parts of the power transmission unit 9 and a plurality of parts of the power reception unit 10 to face each other in a non-contact manner via the boundary surface 8 between the power supply region 2 and the power supplied region 4. , A plurality of capacitors (or capacitors; hereinafter referred to as “coupling capacitors” 12 and 13) are configured (in FIG. 1, for convenience of illustration, the coupling capacitors 12 and 13 are external to the power receiving unit 10 and the power transmission unit 9. Actually, the power receiving unit 10 and a part of the power transmission unit 9 are included). A plurality of such coupling capacitors 12 and 13 are arranged in the power transmission path, and electric field type power transmission is performed via these coupling capacitors 12 and 13. According to this configuration, it is possible to supply power while maintaining the power transmitting unit 9 and the power receiving unit 10 in a non-contact state, and power can be supplied even when the power transmitting unit 9 is covered with a dielectric material or the like. Therefore, it is not necessary to expose the power supply body 3 to the power supplied region 4, and the safety and durability of the power supply system 1 can be improved. In addition, by arranging a plurality of power transmission units 9, even when the power supplied body 5 moves, it is possible to continuously supply power to the power supplied body 5 and to move the power supplied body 5. Can be secured.

  In particular, a part of the characteristic of the power supply system 1 is that the capacitor induction is induced in the power transmission unit 9 of the power supply body 3 by the capacity induction unit 11. When the capacity inducing unit 11 is configured as a part of the power receiving unit 10 (not shown), in addition to a part of the power receiving unit 10 or instead of a part of the power receiving unit 10, May be configured differently (as shown in FIG. 1). By disposing the capacitance inducing portion 11 so as to face the power transmitting portion 9 in a non-contact manner via the boundary surface 8, the power transmitting portion 9 induces a capacitor capacitance 14. In addition, power can be supplied from the power supply body 3 through the power supplied body 5 through the resonance circuit including at least the capacitor capacitance 14 and the plurality of coupling capacitors 12 and 13. . In this way, power transmission is performed using the capacitor capacitance 14 that is induced by disposing the power transmission unit 9 and the capacity inducing unit 11 so as to face each other in a non-contact manner. It becomes possible to flow current by forming.

[II] Specific Contents of Each Embodiment Next, specific contents of each embodiment of the power supply system will be described. The configuration of each of the following embodiments is the same as the configuration described in the above basic concept unless otherwise specified, and the same configuration as the basic concept was used in the description of this basic concept. The same reference numerals and / or names as those used are attached as necessary, and description thereof is omitted.

[Embodiment 1]
First, the first embodiment will be described. In the first embodiment, the capacity inducing means is formed by a part of the power receiving electrode as the power receiving means.

(Constitution)
FIG. 2 is a perspective view of the power supply system according to the first embodiment. As shown in FIG. 2, the power supply system 20 according to the first embodiment includes a power supply body 30 disposed in a power supply region 21 (a space below the top plate 23 of the desk 22), The power supply body 30 includes a power supply body 40 (shown here as a laptop computer) disposed in a supply area 24 (a space above the top plate 23 of the desk 22). Power is supplied to the power supplied body 40 from the power supply. In the first embodiment, the top plate 23 of the desk 22 corresponds to the boundary surface 25 between the power supply region 21 and the power supplied region 24, and a coupling capacitor 26 (to be described later) via the top plate 23 ( (Not shown in FIG. 2).

(Configuration-interface, top plate)
In FIG. 2, the top plate 23 constituting the boundary surface 25 between the power supply area 21 and the power supplied area 24 is made of a dielectric material that can constitute a coupling capacitor 26 described later. As such a dielectric material, for example, a fluororesin can be employed. In addition to the case of using the dielectric material for the top plate 23, the dielectric material can be coated on a power receiving electrode side surface of a power transmitting electrode 36 described later or a power transmitting electrode side surface of a power receiving electrode 43 described later. In addition, the material used for the top plate 23 and the material used for coating the power transmission electrode 36 and the power reception electrode 43 as described above are used to maintain the required insulation between the power transmission electrode 36 and the power reception electrode 43. It is preferable to provide insulation performance. In addition, as a component which comprises the boundary surface 25, it is not limited to a hard member like the top plate 23, You may use a soft member like an insulator sheet.

(Configuration-power supply)
Next, the configuration of the power supply body 30 will be described. FIG. 3 is a circuit diagram of the power supply body 30 and the power supplied body 40 according to the first embodiment. The power supply body 30 includes a power transmission unit 31. The power transmission unit 31 includes an AC power source 32, a capacitor 33, a transformer 34, an inductor (coil) 35, and a plurality of power transmission electrodes 36 on a line. They are connected as shown in the figure.

  The AC power source 32 is a supply source of AC power, and is configured as, for example, a commercial power source or a combination of a storage battery and a voltage / frequency converter. In particular, the AC power supply 32 is a high-frequency (for example, a frequency in a band of about 10 kHz to 100 MHz) AC power supply 32 and has a capacity capable of transmitting an amount of electric power according to the load 42 of the power supplied body 40.

  The capacitor 33 is connected in parallel to the AC power supply 32 and a coil 34a (described later) of the transformer 34, and constitutes a parallel resonance circuit together with the coil 34a.

  The transformer 34 is configured by arranging a pair of coils 34a and 34b in parallel with each other at a predetermined interval, and power transmission is possible by mutual induction between the coils 34a and 34b. . Furthermore, in order to boost the output voltage of the AC power supply 32 at a desired transformation ratio and supply it to the power transmission electrode 36, the turn ratio between the coils 34a and 34b is set.

  The inductor 35 is connected in series to each of the plurality of power transmission electrodes 36 and constitutes a parallel resonant circuit together with a capacitor capacitance 37 induced by a capacitance induction unit 44 described later. In the present specification, unless otherwise specified, the “resonant circuit” refers to the parallel resonant circuit.

  The plurality of power transmission electrodes 36 are each generally formed as a flat conductor, and are substantially parallel to the top plate 23 at a position near the top plate 23 in the power supply region 21. Has been placed. These power transmission electrodes 36 may be brought into contact with the top plate 23 or may be arranged at a minute distance from the top plate 23. In any case, the surfaces of the power transmission electrodes 36 on the power supplied region 24 side are completely covered with the top plate 23, and the power transmitting electrodes 36 are not directly exposed to the power supplied region 24. It has a structure.

  FIG. 4 shows a plan view of the plurality of power transmission electrodes 36 and the plurality of power reception electrodes 43. Actually, the power transmission electrode 36 is covered with the top plate 23 and cannot be seen from above the top plate 23. However, in FIG. 4, for convenience of explanation, the top plate 23 is omitted and the power transmission electrode 36 is exposed. (The same applies to FIGS. 9, 10, and 19-21 described later). As shown in FIG. 4, the plurality of power transmission electrodes 36 are formed in the same planar shape (regular square shape). Specifically, in the first embodiment, the planar shape of each power transmission electrode 36 is the same regular square shape. In addition, the plurality of power transmission electrodes 36 are in a power transmission plane parallel to the top plate 23 that is the boundary surface 25, and a predetermined first direction and a second direction orthogonal to the first direction in the power transmission plane. A plurality of rows are arranged in parallel. That is, when the direction indicated by the arrow D1 in FIG. 4 is the first direction, a plurality of power transmission electrodes 36 are arranged in parallel along the first direction over a plurality of rows. When the direction indicated by the arrow D2 in FIG. 4 is the second direction, a plurality of power transmission electrodes 36 are arranged in parallel along the second direction over a plurality of rows. In other words, the plurality of power transmission electrodes 36 are arranged in a so-called checkered pattern as a whole. The power transmission electrodes 36 adjacent along the first direction are arranged in parallel so that the polarities are alternately different, and the power transmission electrodes 36 adjacent along the second direction are also alternately different in polarity. It is installed side by side. As shown in FIG. 3, among the two lines of the transformer 34, a plurality of power transmission electrodes 36 of one polarity connected to one line and a plurality of power transmissions of the other polarity connected to the other line. Electrodes 36 are arranged so as to be alternately adjacent. Hereinafter, when it is necessary to distinguish the polarities of the plurality of power transmission electrodes 36 from each other, the plurality of power transmission electrodes 36 connected to the one line are referred to as “first power transmission electrodes” 36A, and the other The plurality of power transmission electrodes 36 connected to the line are referred to as “second power transmission electrodes” 36B. However, when it is not necessary to distinguish the polarities of the plurality of power transmission electrodes 36 from each other, they are simply referred to as “power transmission electrodes” 36. The plurality of power transmission electrodes 36 are arranged in parallel with each other in an insulated state. That is, as shown in FIG. 4, the plurality of power transmission electrodes 36 are arranged at the same interval from each other, and this interval is sufficient to ensure mutual insulation of the plurality of power transmission electrodes 36. It is decided to become. However, the insulation between the plurality of power transmission electrodes 36 may be performed by arranging a known insulating material between the plurality of power transmission electrodes 36.

(Configuration-Power supplied body)
Next, the configuration of the power supplied body 40 in FIG. 3 will be described. The power supply body 40 includes a power receiving unit 41 and a load 42. The power receiving unit 41 includes a plurality of power receiving electrodes 43, a capacity inducing unit 44, a polarity sorting unit 45, and a smoothing unit 46. It is configured.

  Each of the plurality of power receiving electrodes 43 is generally formed as a flat conductor, and is substantially parallel to the top plate 23 at a position near the top plate 23 in the power supply region 24. It is arranged to be. These power receiving electrodes 43 may be brought into contact with the top plate 23 or may be arranged at a minute distance from the top plate 23. In FIG. 3, the power receiving electrode 43 is exposed to the outside of the power supplied body 40 at the lowest position of the power supplied body 40, but the surface of the power receiving electrode 43 on the power supply region 21 side is a dielectric. It is good also as a non-exposed state with respect to the exterior by covering with etc.

  As shown in FIG. 4, the plurality of power receiving electrodes 43 are formed in the same planar shape. Specifically, in the first embodiment, the planar shape of each power receiving electrode 43 is the same circular shape. In addition, the plurality of power receiving electrodes 43 are within a power receiving plane parallel to the top plate 23 that is the boundary surface 25, and a predetermined first direction and a second direction orthogonal to the first direction in the power receiving plane. A plurality of rows are arranged in parallel. That is, when the direction indicated by the arrow D1 in FIG. 4 is the first direction, a plurality of power receiving electrodes 43 are arranged in parallel along the first direction over a plurality of rows. In addition, when the direction indicated by the arrow D2 in FIG. 4 is the second direction, a plurality of power receiving electrodes 43 are arranged in parallel along the second direction over a plurality of rows. Here, the parallel arrangement direction of the power transmission electrode 36 and the parallel arrangement direction of the power reception electrode 43 are made to coincide with each other, but actually, the power reception electrode 43 is randomly opposed to the power transmission electrode 36 at a free position. Since they can be arranged, these juxtaposed directions need not coincide. The plurality of power receiving electrodes 43 are arranged in parallel with each other in an insulated state. That is, as shown in FIG. 3, the plurality of power receiving electrodes 43 are spaced apart from each other, and this spacing is sufficient to ensure mutual insulation of the plurality of power receiving electrodes 43. Has been determined to be. However, it is also possible to insulate the plurality of power receiving electrodes 43 from each other by disposing a known insulating material between the plurality of power receiving electrodes 43. In addition, since it is preferable that the plurality of power receiving electrodes 43 can be moved together while maintaining a relative relationship between them, for example, it is preferable to connect the plurality of power receiving electrodes 43 with an insulating member.

  The capacity inducing unit 44 shown in FIG. 3 induces a capacitor capacity 37 between the first power transmission electrode 36A and the second power transmission electrode 36B. In the present embodiment, the capacity inducing unit 44 is configured by a part of the plurality of power receiving electrodes 43. That is, among the plurality of power receiving electrodes 43, the power receiving electrode 43 is different from the power receiving electrode 43 opposed to only the first power transmitting electrode 36A and the power receiving electrode 43 opposed to only the second power transmitting electrode 36B, and The power receiving electrode 43 disposed so as to straddle between the power transmitting electrode 36A and the second power transmitting electrode 36B constitutes the capacity inducing unit 44. For this reason, the power receiving electrode 43 that constitutes the capacity inducing portion 44 among the plurality of power receiving electrodes 43 can be changed according to the arrangement position of the power supplied body 40 with respect to the power supplying body 30. Hereinafter, among the plurality of power receiving electrodes 43, the power receiving electrode 43 constituting the capacity inducing portion 44 is referred to as “capacity inducing power receiving electrode” 43A as necessary.

5 is a partially enlarged view of the periphery of the power transmitting electrode 36 and the power receiving electrode 43 in FIG. 3, FIG. 6 is an enlarged view of a region X in FIG. 5, and FIG. 7 is a conceptual diagram for explaining the capacitor capacity. As shown in FIGS. 5 and 6, the power receiving electrode 43X is disposed opposite to the first power transmitting electrode 36A, and the first coupling capacitor 26A is configured by capacitive coupling between the first power transmitting electrode 36A and the power receiving electrode 43X. Is done. As a result, as shown in FIG. 7, the capacitance of the first coupling capacitor 26A = C _AX is generated. As shown in FIGS. 5 and 6, the power receiving electrode 43Y is disposed opposite to the second power transmitting electrode 36B, and the second coupling capacitor 26B is formed by capacitive coupling between the second power transmitting electrode 36B and the power receiving electrode 43Y. Is configured. As a result, as shown in FIG. 7, the capacitance of the second coupling capacitor 26B = C _BY is generated (if the first coupling capacitor 26A and the second coupling capacitor 26B do not need to be distinguished from each other). Is collectively referred to as “coupling capacitor” 26). Furthermore, as shown in FIGS. 5 and 6, a power receiving electrode 43Z (capacitance inducing power receiving electrode 43A) is arranged so as to straddle between the first power transmitting electrode 36A and the second power transmitting electrode 36B. Due to the capacitive coupling between the power transmission electrode 36A and the power reception electrode 43Z and the capacitive coupling between the second power transmission electrode 36B and the power reception electrode 43Z, as shown in FIG. 7, capacitor capacitances 37 = C _{AZ and} C _BZ are generated. To do.

  The capacitor capacity 37 will be described in more detail. In the example shown in FIGS. 5 and 6, the capacity inducing power receiving electrode 43A is located slightly closer to the second power transmitting electrode 36B than the first power transmitting electrode 36A. As a result, the capacity induction power receiving electrode 43A is more than the opposed area to the first power transmitting electrode 36A. The area facing the second power transmission electrode 36B is large. For this reason, more current flows from the second power transmission electrode 36B than the first power transmission electrode 36A, and the impedance is expressed by the following equation (1).

  Furthermore, in practice, a plurality of capacity inducing power receiving electrodes 43A are simultaneously present along the arrangement direction of the power receiving electrodes 43, and each of the plurality of capacity inducing power receiving electrodes 43A is connected to the first power transmitting electrode 36A. Since the second power transmission electrodes 36B are capacitively coupled to each other, the combined capacity of the capacitor capacity 37 of the plurality of capacity induction power receiving electrodes 43A is expressed by the following equation (2).

  Next, the polarity classification unit 45 in FIG. 3 will be described. The polarity separation unit 45 connects the power receiving electrode 43 and the load 42 to each other, separates the polarity of the current received through the power receiving electrode 43, and supplies the current of a predetermined polarity to each terminal of the load 42. This is a means for separating the polarity. Specifically, the polarity separation unit 45 connects a pair of diodes 45a and 45b to each power receiving electrode 43 in different directions and then connects the diodes 45a and 45b in the same direction to each other. In addition, it is connected to one terminal of the load 42. Specifically, as shown in FIG. 7, one diode 45 a among a pair of diodes 45 a and 45 b arranged for each power receiving electrode 43 has an anode connected to the power receiving electrode 43 and a cathode connected to the other. Are connected to one terminal of the load 42 together with the cathode of the diode in the same direction. The other diode 45b has a cathode connected to the power receiving electrode 43, and an anode connected to the other terminal of the load 42 together with the anode of another diode in the same direction. By providing such a polarity separation unit 45, the power receiving electrode disposed opposite to the first power transmission electrode 36 </ b> A even when the power supplied body 40 is disposed opposite to the power supplying body 30 at an arbitrary position. 43 and a power receiving electrode 43 disposed opposite to the second power transmitting electrode 36B, a current having a predetermined polarity can flow through each terminal of the load 42 while generating a potential difference. it can. In particular, since the polarity separation unit 45 is configured by only the diodes 45a and 45b and the line, compared to the case where the polarity is switched using a mechanical switch as in the conventional example shown in FIG. In addition to simplifying the configuration, durability can be improved.

  The smoothing unit 46 in FIG. 3 is a smoothing unit that smoothes the current received through the power receiving electrode 43. Specifically, the smoothing unit 46 is configured as a smoothing circuit including an inductor 46a connected in series to each terminal of the load 42 and a capacitor 46b connected in parallel to the inductor 46a.

  In FIG. 3, the load 42 is shown as a resistor for convenience of illustration, but in the present embodiment, the load 42 is configured as various power consuming components provided in the laptop computer shown in FIG.

(Reciprocal relationship between power transmission electrode and power reception electrode 43)
Next, the mutual relationship between the power transmission electrode 36 and the power reception electrode 43 will be described. The power transmission electrode 36 and the power reception electrode 43 are arranged such that when the power supplied body 40 is disposed opposite to the power supply body 30, 1) a part of the power reception electrode 43 faces only the first power transmission electrode 36 </ b> A. ) The other part of the power receiving electrode 43 faces only the second power transmitting electrode 36B, and 3) The other part of the power receiving electrode 43 is between the first power transmitting electrode 36A and the second power transmitting electrode 36B. It is configured to satisfy the three conditions of straddling (hereinafter, these three conditions are collectively referred to as “electrode arrangement conditions”). The specific configuration for satisfying this electrode arrangement condition is arbitrary. For example, as shown in FIG. 4, the width = length of the power transmission electrode 36 is L1, the diameter of the power reception electrode 43 is L2, and a plurality of power transmission electrodes L3 is the maximum value of the mutual spacing of 36 (in the example shown in FIG. 4, the diagonal length of the square spacing formed by the four power transmitting electrodes 36 adjacent to each other), and the minimum width and length of the power receiving electrode 43 Value (here, since the power receiving electrode 43 has a circular shape, the minimum value = the diameter L2 of the power receiving electrode 43. However, when the power receiving electrode 43 has an elliptical shape or a rectangular shape, its side, width, If the minimum length) is L4, these dimensions are determined such that L1> L2 and L3 <L4.

  However, even in the case where the power transmission electrode 36 and the power reception electrode 43 are configured in this manner, in the case of the arrangement as shown in FIG. The planar shape of the spacing region of the power transmission electrodes 36) is a straight band, and the planar shape of a region formed by the spacing between adjacent power receiving electrodes 43 (hereinafter, the spacing region of the power receiving electrodes 43) is a straight band. . For this reason, when the power supply body 40 is disposed opposite to the power supply body 30 at a position where the space area of the power transmission electrode 36 and the space area of the power reception electrode 43 overlap each other, There is a possibility that the first power transmission electrode 36 </ b> A and the second power transmission electrode 36 </ b> B do not straddle each other (at least a part of the electrode arrangement condition may not be satisfied). The configuration for preventing this problem will be described in the second embodiment and the modification examples.

(Power supply operation)
Next, the power supply operation performed using the power supply system according to the present embodiment will be described. In FIG. 3, the AC power supply 32 is activated in a state where the power supply body 40 is disposed opposite to the power supply body 30. At this time, the frequency of the AC power supply 32 is set so as to satisfy the resonance condition of the parallel resonance circuit. Then, the AC power supplied from the AC power supply 32 is boosted by the transformer 34 through the resonance circuit on the primary side of the transformer 34 and supplied to the power transmission electrode 36. The AC power applied to the power transmission electrode 36 is boosted by a parallel resonance circuit including a capacitor capacitance 37 induced by the capacitance induction unit 44 and the inductor 35, and is received by the power reception electrode 43 via the coupling capacitor. The AC power received in this way is subjected to polarity separation by the polarity separation unit 45, smoothed by the smoothing unit 46, and supplied to the load 42. Accordingly, it is possible to perform power supply in a non-contact state in which the power supply body 40 is not in direct contact with the power supply body 30.

  In particular, since the mutual relationship between the power transmission electrode 36 and the power reception electrode 43 is determined so as to satisfy the electrode arrangement condition, contactless power supply is performed regardless of the arrangement position of the power supplied body 40 with respect to the power supply body 30. In other words, a so-called free position of the power supplied body 40 can be achieved. For example, even if the power supplied body 40 is once lifted from the top plate 23 and then disposed again at a different position on the top plate 23, non-contact power supply is performed by satisfying the electrode arrangement conditions. Alternatively, even when the power supplied body 40 is moved along the top plate 23 while being in contact with the top plate 23, non-contact power supply is performed by satisfying the electrode arrangement condition.

  Further, in a portion where the capacitor capacitance 37 is not induced by the capacitance inducing portion 44 (each portion of the power supply body 30 where the capacitance induction power receiving electrode 43A of the power supplied body 40 is not opposed), the voltage is boosted by a parallel resonance circuit. Is not performed, the AC power voltage remains low. Therefore, even if the user intentionally or carelessly touches this portion via the top plate 23, the user will not be electrocuted. Further, in the portion where the capacitor capacitance 37 is induced (each portion of the power supply body 30 where the capacitance induction power receiving electrode 43A of the power supplied body 40 is opposed), the resonance condition of the parallel resonance circuit is not satisfied In this case, since the voltage is not boosted by the parallel resonance circuit, the voltage of the AC power remains low. Therefore, even if a conductor such as an iron plate is dropped on the upper surface of the power supply body 30 instead of the power supplied body 40 intentionally or carelessly, the induced capacitor capacity 37 is increased. For example, the resonance condition is not satisfied because the current passes too much, and no current flows through the conductor.

(Effect of Embodiment 1)
As described above, according to the first embodiment, the capacitance inducing unit 44 of the power supplied body 40 induces the capacitor capacity 37 in the power transmission unit 31 of the power supply body 30 and the capacitor circuit 37 is used to configure the resonance circuit. As a result, power can be supplied via the resonance circuit only at the position where the power supplied body 40 is disposed, and a non-contact free position can be achieved, and the resonance circuit can be formed only in a necessary range to form a current. It becomes possible to flow. In addition, since it is not necessary to arrange a capacitor for the resonance circuit in the power supply body 30, the configuration of the power supply body 30 can be simplified.

  In addition, since the capacity inducing part 44 is configured as a part of the plurality of power receiving electrodes 43, it is not necessary to provide the capacity inducing part 44 separately from the plurality of power receiving electrodes 43, and the structure of the power supplied body 40 can be simplified. Can do.

  In addition, since the plurality of power transmission electrodes 36 are arranged in parallel in a mutually insulated state so that the polarities are alternately changed along the first direction and the second direction, any one of the first direction and the second direction is arranged. It is possible to supply power by moving the power supplied body 40 also in the direction of, and it is possible to realize a free position in a two-dimensional region.

  In addition, since the plurality of power receiving electrodes 43 are arranged in parallel along the first direction and the second direction in a plurality of rows in a mutually insulated state, power is supplied to both the first direction and the second direction. It is possible to supply the power by moving the supply target 40 and to realize a free position in the two-dimensional region.

[Embodiment 2]
Next, a second embodiment will be described. In the second embodiment, the capacity inducing means is constituted by a capacity inducing electrode. The configuration of the second embodiment is substantially the same as the configuration of the first embodiment unless otherwise specified, and the configuration substantially the same as that of the first embodiment is the same as that used in the first embodiment. The same reference numerals and / or names are assigned as necessary, and the description thereof is omitted.

(Configuration-Power supplied body)
First, the configuration of the power supplied body 50 will be described. FIG. 8 is a circuit diagram of the power supply body 30 and the power supplied body 50 according to the second embodiment. The power receiving unit 51 of the power supply body 50 includes a plurality of power receiving electrodes 43, a capacity inducing unit 52, a polarity sorting unit 45, and a smoothing unit 46.

  The capacity inducing unit 52 induces a capacitor capacity 37 between the first power transmission electrode 36A and the second power transmission electrode 36B. In the present embodiment, the capacity inducing unit 52 is configured by a part of the power receiving electrode 43 and the capacity inducing electrode 53. 9 is a plan view of the plurality of power transmission electrodes 36 and the plurality of power reception electrodes 43, and FIG. 10 is a partial perspective view showing a state in which the plurality of power reception electrodes 43 are excluded from FIG. As shown in FIGS. 9 and 10, the capacitance inducing electrode 53 is a flat body arranged in the power receiving plane, and has a hole 53 a formed in a region corresponding to each of the plurality of power receiving electrodes 43. And it is formed as a plate-like body that is interposed between the plurality of power receiving electrodes 43 in an insulated state from the power receiving electrodes 43. For example, the manufacturing method of the capacitance inducing electrode 53 is as follows. First, a conductive plate having a size slightly larger than the outer peripheral size of the plurality of power receiving electrodes 43 arranged in parallel as in the first embodiment is prepared. Next, a circular hole 53 a having a slightly larger diameter than each of the plurality of power receiving electrodes 43 is formed in the conductive plate at a position corresponding to each power receiving electrode 43, thereby completing the capacitance inducing electrode 53. To do. A power receiving electrode 43 is disposed in each hole 53 a of the capacitance inducing electrode 53. At this time, in order to ensure insulation between the capacity inducing electrode 53 and the power receiving electrode 43, in order to ensure insulation between the periphery of each hole 53 a of the capacity inducing electrode 53 and the power receiving electrode 43. A sufficient interval is provided, or a known insulating material is disposed between them. In addition, since it is preferable that the plurality of power receiving electrodes 43 and the capacity inducing electrode 53 can be moved together while maintaining the relative relationship between them, for example, the plurality of power receiving electrodes 43 are formed by an insulating member. And the capacitance inducing electrode 53 are preferably connected.

FIG. 11 is an enlarged view of the periphery of the power transmission electrode 36 and the power reception electrode 43 in FIG. 8, and FIG. 12 is a conceptual diagram for explaining the capacitor capacity. In the case of FIGS. 11 and 12, as in FIG. 7, capacitor capacity = C _{AX and} C _BY and capacitor capacity 37 = C _{AZ and} C _BZ are generated. Furthermore, since the capacity inducing electrode 53 is disposed so as to straddle between the first power transmitting electrode 36A and the second power transmitting electrode 36B, as shown in FIG. 12, the capacity inducing electrode 53 and the first power transmitting electrode 36A. a capacitance 37 _{= C AF} induced a capacitance 37 _{= C BF} induced between the capacitor induction electrode 53 and the second transmission electrode 36B is induced between.

The capacitor capacity 37 will be described in more detail. The combined capacity of the capacitor capacity 37 = _CAF and the capacitor capacity 37 = _CBF is expressed by the following equation (3).

Therefore, in the case of the second embodiment, the combined capacitance C _X1 of the equation (2) described in the first embodiment and the combined capacitance C _X2 of the above equation (3) are combined, and the capacitor capacitance 37 is expressed as follows. (4)

  Thus, in the second embodiment, the capacitance inducing electrode 53 is used in addition to the capacitance inducing power receiving electrode 43A of the first embodiment. Hereinafter, this reason will be described. In the power supply system 1 according to the first embodiment, the power receiving electrode 43 is always supplied to all of the adjacent first power transmission electrode 36A and the second power transmission electrode 36B within the range in which the power supplied body 40 faces the power supply body 30. May not be straddled, and the power receiving electrode 43 may not be straddled with respect to a part of the adjacent first power transmitting electrode 36A and second power transmitting electrode 36B. In such a case, for example, as described above, the power supply body 40 is opposed to the power supply body 30 at a position where the space area of the power transmission electrode 36 and the space area of the power reception electrode 43 overlap each other. The case where it arrange | positions can be mentioned. For this reason, there is a possibility that the capacitor capacity 37 necessary for forming the parallel resonance circuit cannot be induced and the parallel resonance condition cannot be maintained. For this reason, in addition to the power receiving electrode 43, a dedicated capacity inducing electrode 53 for inducing the capacitor capacity 37 is used, so that capacity induction is always performed for all of the adjacent first power transmitting electrode 36A and second power transmitting electrode 36B. The power supply efficiency can be increased because the large capacitor capacity 37 can be stably induced and the parallel resonance condition can be stably maintained. become. Furthermore, since the large capacitor capacity 37 can be induced stably, the inductor 35 can be made small.

(Effect of Embodiment 2)
As described above, according to the second embodiment, since the capacitance inducing portion 52 is configured as the capacitance inducing electrode 53, the capacitance inducing electrode 53 is always straddled across the first power transmitting electrode 36A and the second power transmitting electrode 36B. Since the large capacitor capacity 37 can be induced stably and the parallel resonance condition can be stably maintained, the power supply efficiency can be increased. Furthermore, since the large capacitor capacity 37 can be induced stably, the inductor 35 can be made small.

  Further, the capacity inducing electrode 53 is a flat body disposed in the power receiving plane, and has a hole 53a in a region corresponding to each of the plurality of power receiving electrodes 43. Since it is formed as a flat plate that is insulated from the power receiving electrode 43 between each other, the hole 53a is formed in one flat plate, so that the capacitance inducing electrode 53 can be easily manufactured over a wide area. be able to.

[Embodiment 3]
Next, Embodiment 3 will be described. In the third embodiment, communication means is further provided in the configuration of the second embodiment. The configuration of the third embodiment is substantially the same as the configuration of the second embodiment unless otherwise specified, and the configuration substantially the same as that of the second embodiment is the same as that used in the second embodiment. The same reference numerals and / or names are assigned as necessary, and the description thereof is omitted.

(Configuration-power supply)
Initially, the structure of the electric power supply body 60 is demonstrated. FIG. 13 is a circuit diagram of the power supply body 60 and the power supplied body 70 according to the third embodiment. The power supply body 60 includes a power transmission side communication unit 61. The power transmission side communication unit 61 is a power transmission side communication unit that communicates with a power reception side communication unit 71 described later. For example, the power transmission side communication unit 61 is configured using RF / MAC that performs RF communication using the MAC protocol (the same applies to the power reception side communication unit 71 described later). The power transmission side communication unit 61 is coupled to the line reaching the first power transmission electrode 36A via the capacitor 62, and is connected to the line reaching the second power transmission electrode 36B. A specific communication method by the power transmission side communication unit 61 is arbitrary. For example, wireless communication can be adopted, but here, PLC (Power Line Communications) communication (semi-wireless communication) via the coupling capacitor 26 is used. (Same in the power receiving side communication unit 71 described later). In other words, the power transmission side communication unit 61 superimposes the analog communication signal on the alternating current and transmits it to the power supplied body 70 via the coupling capacitor 26 and is supplied from the power supplied body 70 via the coupling capacitor 26. An analog communication signal component is separated from the current using a filter (not shown). As the carrier frequency, for example, a frequency higher than the frequency of the AC power supply 32 (as an example, a frequency that is about two to five digits higher) is used.

(Configuration-Power supplied body)
Next, the configuration of the power supplied body 70 will be described. The power supplied body 70 includes a power receiving side communication unit 71. The power reception side communication unit 71 is a power reception side communication unit that communicates with the power transmission side communication unit 61 via the boundary surface 25. For example, the power receiving side communication unit 71 is coupled to a line reaching one terminal of the load 42 via the capacitor 72 and connected to a line reaching the other terminal of the load 42. The power receiving side communication unit 71 superimposes the analog communication signal on the current and transmits the analog communication signal to the power supply body 60 via the coupling capacitor 26, and from the current supplied from the power supply body 60 via the coupling capacitor 26. The analog communication signal component is separated using a filter that does not.

(Power supply operation)
Next, the power supply operation according to the present embodiment will be described. In this control, a part of the power supply body 60 is set to a standby state to reduce power consumption of the power supply body 60 and power supply is performed with all functions of the power supply body 60 in a movable state. The power supply is performed by switching between the two modes of the normal operation mode.

  For example, a control unit (not shown) provided in the power supplied body 70 calls a rated current value or voltage value of the load 42 from a storage unit (not shown) provided in the power supplied body 70 and receives these data. Always output via the side communication unit 71.

  On the other hand, the power supply body 60 is in a standby mode in the initial state. Specifically, only a small amount of power is supplied to the power transmission side communication unit 61, and only the power transmission side communication unit 61 is left as a startup unit, and power is saved in the sleep state without supplying power to other parts. Plan. The power transmission side communication unit 61 constantly monitors the output from the power reception side communication unit 71 of the power supplied body 70, and when the power supplied body 70 is disposed opposite to the power supply body 60, the power transmission side communication is performed. The unit 61 receives data from the power receiving side communication unit 71. When data is received in this way, a control unit (not shown) provided in the power supply body 60 is activated and the standby mode is switched to the normal operation mode. In this normal operation mode, the control unit of the power supply body 60 is configured to supply AC power that matches the rated current value and voltage value of the load 42. A value or frequency is determined, and the AC power supply 32 is controlled so that AC power is output at the current value, voltage value, or frequency, and the resonance condition of the parallel resonance circuit is satisfied.

  Further, in the power supplied body 70, the current value or voltage value of the alternating current input to the load 42 is detected by a known method, and these data are constantly output via the power receiving side communication unit 71.

  On the other hand, in the power supply body 60, the power transmission side communication unit 61 receives data from the power reception side communication unit 71. When the data is received in this way, the control unit of the power supply body 60 determines whether or not the resonance condition of the parallel resonance circuit is maintained based on the current value or voltage value of the alternating current input to the load 42. Then, the AC power supply 32 is controlled based on the determination result.

(Effect of Embodiment 3)
As described above, according to the third embodiment, since the power supply body 60 includes the power transmission side communication unit 61 and the power supplied body 70 includes the power reception side communication unit 71, the power supply body 60, the power supplied body 70, Can be communicated with each other, and adjustment for maintaining the resonance condition can be performed.

[III] Modifications to Each Embodiment While each embodiment according to the present invention has been described above, the specific configuration and means of the present invention are the same as the technical idea of each invention described in the claims. Modifications and improvements can be arbitrarily made within the range. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above contents, and may vary depending on the implementation environment of the invention and the details of the configuration, and only a part of the problems described above. In some cases, only a part of the effects described above may be achieved. Furthermore, according to the present invention, there may be a case where a problem not described above is solved or an effect which is not described above. For example, even if it is not possible to completely achieve a free position by non-contact, if the degree of free position improvement can be improved compared to the conventional case, or the free position of the same level as before is different from the conventional If the technology has achieved it, the problem of the present invention has been solved.

(About power supply)
Among the configurations of the power supply body, the configuration of the power transmission unit excluding the power transmission electrode can be variously changed. FIG. 14 is a circuit diagram of a power supply body according to a modification. The power transmission unit 80 of the power supply body is basically configured in the same manner as the power transmission unit 31 of FIG. 8, but a capacitor 33 is disposed on the secondary side of the transformer 34, and the capacitor 33 and the transformer 34 are arranged. The secondary side coil 34b forms a parallel resonance circuit.

  In addition, the inductor 35 can arbitrarily change the connection position and the number of connections as long as a resonance circuit can be configured. For example, the inductor 35 is not necessarily connected to each of the plurality of power transmission electrodes 36. For example, one common inductor 35 may be connected to two or more power transmission electrodes 36. Specifically, it may be connected to at least one of the first power transmission electrode 36A or the second power transmission electrode 36B among the plurality of power transmission electrodes 36.

(About the power supplied body)
Among the configurations of the power supplied body, various modifications can be made particularly with respect to the configuration of the power receiving unit excluding the power receiving electrode 43. For example, the polarity separation unit 45 may be configured using a known mechanical switch as shown in FIG. 23 instead of the diodes 45a and 45b.

(About power transmission electrode)
The planar shape of the power transmission electrode 36 is not limited to a square shape, and may be any other shape (for example, a triangle, a rectangle, a pentagon, a hexagon, a circle, an ellipse, etc.). Further, the intervals between the plurality of power transmission electrodes 36 may be changed aperiodically or may be unequal intervals.

(Receiving electrode 43)
The planar shape of the power receiving electrode 43 is not limited to a circular shape, and may be any other shape (including, for example, a triangle, a square, a rectangle, a pentagon, a hexagon, an ellipse, and the like). Further, the intervals between the plurality of power transmission electrodes 36 may be changed aperiodically or may be unequal intervals.

  Moreover, the specific manufacturing method of the power receiving unit including the power receiving electrode 43 is arbitrary, but can be manufactured using, for example, an FPC (Flexible Print Circuit). FIG. 15 is a plan view of the power reception unit 90 manufactured using the FPC. The power receiving unit 90 is formed by sequentially forming an adhesive layer and a conductor layer on a film-like insulating layer, and covering the conductor layer with an adhesive layer and an insulating layer as necessary. A plurality of power receiving electrodes 43 are arranged in parallel, and diodes 45 a and 45 b constituting the polarity separation unit 45 are connected to each power receiving electrode 43. More specifically, the diodes 45 a and 45 b are formed in another layer superimposed on the layers of the plurality of power receiving electrodes 43. In addition, a plurality of common lines 91 for connecting two or more power receiving electrodes 43 and two or more diodes 45a and 45b for each polarity are formed, and these plurality of lines 91 are further connected to a common main line 92 for each polarity. It is connected to the. An electrode part 93 is provided at the end of the main line 92, and the power receiving part 90 can be connected to the load 42 via the electrode part 93. By manufacturing the power receiving unit 90 using the FPC in this way, the power receiving unit 90 can be comprehensively manufactured by a printing technique, and the manufacturing cost of the power receiving unit 90 can be reduced. Although not shown in FIG. 15, the power receiving unit 90 including the smoothing unit 46 and the capacitance inducing electrode 53 may be similarly manufactured by FPC.

  In order to maintain the resonance condition, the mutual capacitance between the power receiving electrode 43 and the power transmitting electrode 36 is stabilized to stabilize the capacitor capacitance 37 of the coupling capacitor, or the capacitance inducing power receiving electrode 43A or the like. It is preferable to stabilize the capacitor capacity 37 induced by the capacity inducing section 44 by stabilizing the mutual distance between the capacity inducing electrode 53 and the power transmission electrode 36. For this reason, for example, a configuration as shown in FIG. 16 may be adopted. In this configuration, the power transmission electrode 36 is formed of a magnetic material. Further, the power receiving electrode 43 (or the capacity inducing power receiving electrode 43A or the capacity inducing electrode 53) is formed of a conductive soft material such as polyimide. The power transmission electrode 36 and the magnetic body 94 to be attracted are disposed on the surface of the power reception electrode 43 opposite to the boundary surface 25. According to such a configuration, even when the smoothness of the surface near the boundary surface 25 of the power receiving electrode 43 is low, or even when a gas or a liquid enters between the power receiving electrode 43 and the boundary surface 25. Since the power reception electrode 43 is pressed toward the power transmission electrode 36 by the attractive force of the magnetic body 94, the mutual distance between the power reception electrode 43 and the power transmission electrode 36 is stabilized. In addition, for example, a conductive soft material may be disposed between the power receiving electrode 43 and the boundary surface 25, and the conductive soft material may be brought into close contact with the boundary surface 25 by the weight of the power receiving electrode 43.

(About capacity induction means)
The capacity inducing means is 1) in the case where it is constituted by only a part of the power receiving electrode 43 as described in the first embodiment, and 2) in addition to a part of the power receiving electrode 43 as described in the second embodiment. In the case of using the capacity inducing electrode 53, and 3) in the case of using the capacity inducing electrode 53 in place of a part of the power receiving electrode 43, it is conceivable. In the case of 2), a part of the power receiving electrode 43 is disposed so as to straddle between the first power transmitting electrode 36A and the second power transmitting electrode 36B, and the capacitance inducing electrode 53 is further disposed on the first power transmitting electrode 36A. And the second power transmission electrode 36B. In the case of 3), a part of the power receiving electrode 43 does not straddle between the first power transmitting electrode 36A and the second power transmitting electrode 36B, and only the capacitance inducing electrode 53 is connected to the first power transmitting electrode 36A. It arrange | positions so that it may straddle between the 2nd power transmission electrodes 36B. Thus, as a configuration in which a part of the power receiving electrode 43 does not straddle between the first power transmitting electrode 36A and the second power transmitting electrode 36B, as in Patent Document 2, the first power transmitting electrode 36A and the second power transmitting electrode 36B A configuration in which the mutual interval between the power transmission electrodes 36 </ b> B is sufficiently wider than the maximum width of the power reception electrode 43 can be employed.

(About the capacitance inducing electrode 53)
The capacitance inducing electrode 53 is not limited to the shape described in the second embodiment. For example, as shown in FIG. 17, the capacitance inducing electrode 53 is not in the same power receiving plane as the power receiving electrode 43 but in a plane parallel to the boundary surface 25 and further away from the boundary surface 25 than the power receiving plane. You may comprise as the arrange | positioned flat body. The capacitance inducing electrode 53 is formed with a hole 53a in a region corresponding to the line connected to the plurality of power receiving electrodes 43, and the line can be drawn toward the load 42 through the hole 53a. It is possible. The capacitance inducing electrode 53 is disposed in an insulated state with respect to the plurality of power receiving electrodes 43. Specifically, a sufficient interval is provided between the capacitance inducing electrode 53 and the received power to ensure mutual insulation. Alternatively, a known insulating material may be disposed between the capacitance inducing electrode 53 and the received power to insulate them from each other. When the capacitance inducing electrode 53 is configured in this way, the diameter of the hole 53a can be reduced and the mutual area (volume) of the hole 53a can be increased compared to the case of the second embodiment. Therefore, the resistance of the capacitance inducing electrode 53 can be reduced.

  Alternatively, as shown in FIG. 18, among the capacitance inducing electrodes 53 configured in the same manner as in the example of FIG. 17, a portion 53 b corresponding to each other between the power receiving electrodes 43 is curved toward the boundary surface 25. Thus, the curved portion 53 b may be interposed between the power receiving electrodes 43. Thus, the induced capacitor capacity 37 can be adjusted by adjusting the distance between the curved portion 53 b and the power transmission electrode 36.

(Regarding the mutual relationship between the power transmitting electrode and the power receiving electrode 43)
The number and arrangement of the power transmission electrodes 36 and the power reception electrodes 43 may be changed according to the range where the free position is required. For example, in the case where it is only necessary to arrange the power supply object at a specific place with respect to the power supply body (strictly speaking, when the free position is not required and power supply is performed in a dotted area) As shown in the plan view of FIG. 19, only one first power transmission electrode 36A and two second power transmission electrodes 36B are disposed, and the power reception electrode 43 is a power reception electrode disposed opposite to only the first power transmission electrode 36A. 43, only the power receiving electrode 43 disposed opposite to the second power transmitting electrode 36B, and only the power receiving electrode 43 (capacitance inducing power receiving electrode 43A) straddling the first power transmitting electrode 36A and the second power transmitting electrode 36B. (Alternatively, one capacitive inducing electrode 53 may be arranged instead of the capacitive inducing power receiving electrode 43A). Such a configuration is suitable, for example, when a mobile phone as a power supply body is charged by being placed at a specific position of a charger as a power supply body.

  Alternatively, in the case where it is only necessary to arrange the power supply object at any position along one specific direction in the power supply body (when power supply is performed in a linear region (one-dimensional region)), FIG. As shown in the plan view, the first power transmission electrode 36A and the second power transmission electrode 36B are arranged at a predetermined interval along one specific direction (the direction indicated by the arrow in FIG. 20), and the power reception electrode 43 is disposed in FIG. You may arrange | position similarly to the case. Such a configuration is suitable, for example, when power is supplied to a moving body as a power supplied body that moves on a straight track.

  In addition, as described above, when the planar shape of the spacing region of the power transmission electrode 36 is a straight strip and the planar shape of the spacing region of the power receiving electrode 43 is a straight strip, the spacing region of the power transmission electrode 36 and the receiving electrode 43 are configured. In the case where the power supply body is disposed opposite to the power supply body at a position where the gap region overlaps with each other, the power reception electrode 43 is disposed between the first power transmission electrode 36A and the second power transmission electrode 36B. (Possibility that at least a part of the electrode arrangement condition is not satisfied) occurs. In order to solve this problem, it is preferable that the gap region of the power transmission electrode 36 and the gap region of the power reception electrode 43 have different shapes. For example, as shown in FIG. 21, when the planar shape of each power transmission electrode 36 is a hexagonal shape and the plurality of power transmission electrodes 36 are arranged side by side in a honeycomb shape, the interval region of the power transmission electrodes 36 becomes a non-linear band shape. Therefore, even if the planar shape of the gap region of the power receiving electrode 43 is a straight band, the power receiving electrode 43 can be surely straddled between the first power transmitting electrode 36A and the second power transmitting electrode 36B. Similarly, one of the plurality of power transmission electrodes 36 and the plurality of power reception electrodes 43 may be arranged so as to form a jigsaw puzzle pattern or a Penrose tile pattern.

(Resonant circuit)
The resonance circuit of the power supply body only needs to include at least the inductor 35 and the capacitor capacitance 37 induced by the capacitance inducing unit 44, and may include any other circuit element. For example, it may be considered that the capacitor capacitance 37 induced by the capacitance induction unit 44 is combined with a first coupling capacitor and a second coupling capacitor to form a resonance circuit. In this case, the first coupling capacitor, the first coupling capacitor, A resonance circuit is configured including a two-coupling capacitor, an inductor 35, and a capacitor capacitance 37 induced by the capacitance inducing unit 44, and power can be supplied from the power supply body to the power supply target body via this resonance circuit. It becomes. The capacitor capacitance 37 induced by the capacitance induction unit 44 may be considered separately from the first coupling capacitor and the second coupling capacitor. In this case, the capacitor induced by the inductor 35 and the capacitance induction unit 44 Power can be supplied from the power supply body via the power supply body via the resonance circuit including the capacitor 37, the first coupling capacitor, and the second coupling capacitor.

(About smooth part)
As the configuration of the smoothing unit 46, in addition to the configuration described above, a different configuration using a known technique can be adopted, and for example, it may be configured only by a capacitor.

(About power transmission side communication unit and power reception side communication unit)
As the configuration of the power transmission side communication unit 61 and the power reception side communication unit 71, in addition to the configuration described above, a different configuration using a known technique can be adopted. For example, wireless communication that performs RF wireless communication using the MAC protocol You may comprise as a communication part.

DESCRIPTION OF SYMBOLS 1,20 Electric power supply system 2, 21, 100 Electric power supply area 3, 30, 60 Electric power supply body 4, 24, 102 Electric power supply area 5, 40, 70 Electric power supply object 7, 42 Load 8, 25 Boundary surface 9 , 31, 80 Power transmission unit 10, 41, 51, 90 Power receiving unit 11, 44, 52 Capacitance induction unit 12, 13, 26, 109 Coupling capacitor 14, 37 Capacitor capacity 22 Machine 23 Top plate 26A First coupling capacitor 26B Second Coupling capacitor 6, 32, 115 AC power supply 34 Transformer 34a, 34b, 110 Coil 35, 120 Inductor (coil)
36, 105, 106 Power transmitting electrode 36A First power transmitting electrode 36B Second power transmitting electrode 43, 107, 108 Power receiving electrode 43A Capacity inducing power receiving electrode 45 Polarity separating unit 46 Smoothing unit 53 Capacity inducing electrode 53a Hole 61 Power transmitting side communication unit 33, 62, 72, 121 Capacitor 71 Power-receiving-side communication unit 91 Line 92 Main line 93 Electrode unit 94 Magnetic body 101 Fixed body 103 Movable body

Claims (10)

Power for supplying AC power supplied from a predetermined AC power source to a predetermined load from a power supply body arranged in the power supply area via a power supplied body arranged in the power supplied area A feeding system,
The power supplier is
Power transmission means for supplying AC power supplied from the AC power source to the power supplied body,
The power supplied body is
Power receiving means for receiving AC power supplied from the power transmitting means and supplying the AC power to the load;
A capacity inducing means configured as a part of the power receiving means or different from the power receiving means,
By arranging a plurality of portions of the power transmission means and a plurality of portions of the power reception means to face each other in a non-contact manner through a boundary surface between the power supply region and the power supplied region, Forming a coupling capacitor,
By causing the power transmission means and the capacity inducing means to face each other in a non-contact manner via the boundary surface, the power transmission means induces a capacitor capacity,
Through the resonant circuit configured to include at least the capacitor capacity and the plurality of coupling capacitors, power can be supplied from the power supply body through the power supplied body.
Power supply system. The power transmission means is disposed at a position near a boundary surface between the power supply region and the power supplied region, and includes a plurality of power transmission electrodes that receive supply of AC power from the AC power source,
The power supply body includes an inductor connected to at least one of the first power transmission electrode or the second power transmission electrode among the plurality of power transmission electrodes,
The power receiving means includes a plurality of power receiving electrodes arranged in a non-contact manner across the boundary surface with respect to the plurality of power transmitting electrodes,
The capacitance inducing means is configured as a part of the plurality of power receiving electrodes,
A first coupling capacitor is formed by opposing a part of the power receiving electrodes of the plurality of power receiving electrodes to the first power transmitting electrode of the plurality of power transmitting electrodes,
The second power transmitting electrode adjacent to the first power transmitting electrode among the plurality of power transmitting electrodes is different from the part of the power receiving electrodes that are opposed to the first power transmitting electrode among the plurality of power receiving electrodes. A second coupling capacitor is formed by facing a part of the receiving electrodes,
A power receiving electrode different from the power receiving electrode opposed to the first power transmitting electrode or the second power transmitting electrode among the plurality of power receiving electrodes so as to straddle between the first power transmitting electrode and the second power transmitting electrode. Inducing the capacitor capacity between the first power transmission electrode and the second power transmission electrode by positioning the capacity inducing means as
Via the resonance circuit including the first coupling capacitor, the second coupling capacitor, the inductor, and the capacitor capacitance, or the resonance circuit including the inductor and the capacitor capacitance; The power can be supplied from the power supply body via the first coupling capacitor and the second coupling capacitor via the power supplied body.
The power supply system according to claim 1. The power transmission means is disposed at a position near a boundary surface between the power supply region and the power supplied region, and includes a plurality of power transmission electrodes that receive supply of AC power from the AC power source,
The power supply body includes an inductor connected to at least one of the first power transmission electrode or the second power transmission electrode among the plurality of power transmission electrodes,
The power receiving means includes a plurality of power receiving electrodes arranged in a non-contact manner across the boundary surface with respect to the plurality of power transmitting electrodes,
In addition to a part of the plurality of power receiving electrodes or in place of the plurality of power receiving electrodes, the capacity inducing means may be such that at least a part thereof straddles between the first power transmitting electrode and the second power transmitting electrode. Configured as a capacitance inducing electrode,
A first coupling capacitor is formed by opposing a part of the power receiving electrodes of the plurality of power receiving electrodes to the first power transmitting electrode of the plurality of power transmitting electrodes,
The second power transmitting electrode adjacent to the first power transmitting electrode among the plurality of power transmitting electrodes is different from the part of the power receiving electrodes that are opposed to the first power transmitting electrode among the plurality of power receiving electrodes. A second coupling capacitor is formed by facing a part of the receiving electrodes,
By positioning the capacitance inducing means so as to straddle between the first power transmission electrode and the second power transmission electrode, the capacitor capacitance is induced between the first power transmission electrode and the second power transmission electrode. ,
Via the resonance circuit including the first coupling capacitor, the second coupling capacitor, the inductor, and the capacitor capacitance, or the resonance circuit including the inductor and the capacitor capacitance; The power can be supplied from the power supply body via the first coupling capacitor and the second coupling capacitor via the power supplied body.
The power supply system according to claim 1 or 2. The plurality of power receiving electrodes are arranged in parallel in a power receiving plane parallel to the boundary surface in an insulated state,
The capacitance inducing electrode is a plate-like body arranged in the power receiving plane, and has a hole in a region corresponding to each of the plurality of power receiving electrodes, and between the plurality of power receiving electrodes. Formed as a flat body interposed in an insulated state with the power receiving electrode in
The power supply system according to claim 3. The plurality of power receiving electrodes are arranged in parallel in a power receiving plane parallel to the boundary surface in an insulated state,
The capacitance inducing electrode is a flat body that is parallel to the boundary surface and at least partially disposed in a plane that is farther from the boundary surface than the power receiving plane, and the plurality of power receiving electrodes It has a hole in a region corresponding to the connected line, and is formed as a flat plate disposed in an insulated state with respect to the plurality of power receiving electrodes.
The power supply system according to claim 3. The plurality of power transmission electrodes are formed in the same shape as each other, and in a power transmission plane parallel to the boundary surface, a second direction orthogonal to the predetermined first direction and the first direction in the power transmission plane. A plurality of rows are arranged in parallel in an insulated state so that the polarities are alternately different along the direction.
The power supply system according to any one of claims 2 to 5. The plurality of power receiving electrodes are formed in a shape wider than the interval between the plurality of power transmitting electrodes and in the same shape, and in a power receiving plane parallel to the boundary surface, a predetermined first direction and A plurality of rows are juxtaposed in a mutually insulated state along a second direction orthogonal to the first direction in the power receiving plane.
The power supply system according to claim 6. The power transmission electrode is formed of a magnetic material,
The power receiving electrode is formed of a conductive soft material,
On the surface of the power receiving electrode opposite to the boundary surface, a magnetic body that attracts the power transmitting electrode is disposed.
The power supply system according to any one of claims 2 to 7. The power supply body includes power transmission side communication means,
The power supplied body communicates with the power transmission side communication means via a portion in which a plurality of portions of the power transmission means and a plurality of portions of the power reception means are arranged to face each other in a non-contact manner. Comprising
The power supply system according to any one of claims 1 to 8. A power supply body disposed in the power supply area, wherein the power supply body is configured to supply AC power supplied from a predetermined AC power source to a predetermined load via the power supply body disposed in the power supply area. In the supplier
A power receiving means for receiving AC power supplied from a power transmitting means provided in the power supply body and supplying the AC power to the load;
A capacity inducing means configured as a part of the power receiving means or different from the power receiving means,
By arranging a plurality of portions of the power transmission means and a plurality of portions of the power reception means to face each other in a non-contact manner through a boundary surface between the power supply region and the power supplied region, Forming a coupling capacitor,
By causing the power transmission means and the capacity inducing means to face each other in a non-contact manner via the boundary surface, the power transmission means induces a capacitor capacity,
Through the resonant circuit configured to include at least the capacitor capacity and the plurality of coupling capacitors, power can be supplied from the power supply body.
Electric power recipient.

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