JP2006345661A - Radial gap type motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radial gap motor for eliminating a necessity of a sliding member such as a slip ring for supplying power to a magnetic field coil or an armature coil, simplifying a structure, and overcoming problems that a life of the motor is shortened by a contact abrasion in the slip ring and power is unstably supplied. <P>SOLUTION: The radial gap motor 10 has an armature 12 spaced from a rotor 11 fitted and fixed to an exterior of a drive shaft 13 and radially disposed through an air gap. The armature coil 23 is fixed and disposed on an inner circumference of a stator 12, and alternately excited in the circumferential direction in reverse polarity. One magnetic field coil 18 is fixed and disposed on the side of the rotor 11 in the axial line direction, and annularly wound around an axial line. The rotor 11 comprises first and second induction elements 15, 16 circumferentially and alternately disposed. The first induction element 15 comprises a magnetic material for facing a magnetic pole generated on an inner circumference of the magnetic field coil 18 on one end face, and facing the armature coil 23 on the other end face. The second induction element 16 comprises the magnetic material for facing a magnetic pole generated on an outer circumference of the magnetic field coil 18 on one end face, and facing the armature coil 23 on the other end face. Alternatively, the magnetic field coil and the armature coil can be oppositely disposed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a radial gap type motor in which a stator is arranged with a gap in a radial direction with respect to a rotor fitted and fixed to a drive shaft.

  Conventionally, in the generator disclosed in Japanese Patent Application Laid-Open No. 54-116610 and Japanese Patent Application Laid-Open No. 6-86517, as shown in FIG. The field winding 5 is provided on the outer periphery of the yoke 4 that is externally fitted and fixed to the rotary shaft 1, and the claw-shaped magnetic poles 6 and 7 that protrude alternately from the left and right sides of the field winding 5 are provided as a whole. A rotor is formed. On the other hand, the armature winding 8 is provided on the bracket 2 so as to face the claw-shaped magnetic poles 6 and 7. In addition, the power supply to the field winding 5 is configured to supply power slidably through the slip ring 9.

  For example, when a direct current is supplied to the field winding 5 via the slip ring 9 to generate an N pole on the right side of the drawing of the field winding 5 and an S pole on the left side of the drawing, The N pole is guided to the claw-shaped magnetic pole 6 protruding from the right side, and the S pole is guided to the claw-shaped magnetic pole 7 protruding from the left side. That is, by providing only one field winding 5 wound around the drive shaft 1, a plurality of N poles and S poles can be alternately generated in the circumferential direction on the outer peripheral side of the rotor. .

However, the field winding 5 is formed as a part of the rotor, and the power supply to the field winding 5 that performs the rotational motion must be performed by sliding contact via the slip ring 9, and the structure is In addition to being complicated, there are problems of life reduction due to contact wear at the slip ring 9 and problems that power feeding is not stable when the sliding contact at the slip ring 9 becomes unstable.
JP 54-116610 A JP-A-6-86517

  This invention is made | formed in view of the said problem, and makes it the subject to enable it to simplify the electric power feeding structure etc. to a coil.

In order to solve the above-mentioned problem, in the first invention, in the radial gap type motor in which the stator is arranged with a gap in the radial direction with respect to the rotor fitted and fixed to the drive shaft,
Armature coils that are alternately magnetized in the circumferential direction are fixedly arranged on the inner peripheral surface of the stator, and are wound in an annular shape around the axis on the side in the axial direction of the rotor. One field coil is fixedly arranged,
The rotor has a first inductor made of a magnetic material having one end face facing a magnetic pole generated on the inner peripheral side of the field coil and the other end face facing the armature coil, and one end face being the field. A radial gap type characterized in that second inductors made of a magnetic material facing the magnetic poles generated on the outer peripheral side of the magnetic coil and having the other end face opposed to the armature coil are alternately arranged in the circumferential direction. Provide motor.

With the above configuration, the field coil for generating magnetic poles on the outer periphery of the rotor is fixedly arranged without rotating, so that it is not necessary to use a sliding contact member such as a slip ring for power feeding to the field coil. In addition, it is possible to solve the problem of shortening the service life due to contact wear on the slip ring and the problem of unstable feeding.
Further, even when the rotor rotates, the first inductor moves on the circumference along the outer peripheral side of the field coil, and the second inductor moves on the circumference along the inner peripheral side of the field coil. Since they move, opposite polarities are always induced in the first inductor and the second inductor. Therefore, the rotor is rotationally driven by the repulsion / attraction force with the magnetic pole generated in the armature coil. In addition, it is preferable that a yoke for collecting magnetic flux is fixedly disposed on the inner and outer circumferences of the field coil.

In the second invention, the arrangement positions of the armature coil and the field coil of the first invention are reversed.
That is, in a radial gap type motor in which a stator is arranged with a gap in a radial direction with respect to a rotor fitted and fixed to a drive shaft,
A field coil that is alternately magnetized in the circumferential direction is fixedly arranged on the inner circumferential surface of the stator, and is wound in an annular shape around the axis on the side in the axial direction of the rotor. One armature coil is fixedly arranged,
The rotor has a first inductor made of a magnetic material having one end surface facing a magnetic pole generated on the inner peripheral side of the armature coil and the other end surface facing the field coil, and one end surface of the rotor A radial gap type characterized in that second inductors made of a magnetic material facing the magnetic poles generated on the outer peripheral side of the child coil and having the other end face opposed to the field coil are alternately arranged in the circumferential direction. Provide motor.

In both the first and second inventions, the armature coil is supplied with alternating current, while the field coil is supplied with direct current.
Also in the second invention, since the armature coil for generating the magnetic poles on the outer periphery of the rotor is fixedly arranged without rotating, it is necessary to use a sliding contact member such as a slip ring for power feeding to the armature coil. Absent.
Similarly to the first invention, even if the rotor rotates, the first inductor moves on the circumference along the outer circumference side of the armature coil, and the second inductor is the inner circumference of the armature coil. Since they move on the circumference along the side, opposite polarities are always induced in the first inductor and the second inductor. Therefore, the rotor is rotationally driven by the repulsion / attraction force with the magnetic pole generated in the field coil.

The drive shaft is a magnetic body, and the first inductor is connected to the drive shaft at one end surface, and the other end surface is an armature coil or a field coil fixed to the inner peripheral surface of the stator. Faced,
It is preferable that a magnetic pole generated on the inner peripheral side of the field coil or armature coil arranged on the side of the rotor in the axial direction is guided to the first inductor through the drive shaft. .

  With the above configuration, the magnetic pole generated on the inner peripheral side of the field coil or armature coil arranged on the side in the axial direction of the rotor is transferred to the second inductor using the drive shaft made of an existing magnetic material. Therefore, there is no need to arrange a special member on the inner peripheral side of the field coil or the armature coil, and there is an advantage that the diameter of the motor can be easily reduced.

It is preferable that a yoke made of a magnetic material is disposed on the inner peripheral side or / and the outer peripheral side of the field coil or the armature coil disposed on the side of the rotor in the axial direction.
With this configuration, the inner and outer magnetic poles excited by the field coil are converged by the yoke made of a magnetic material, and the directivity of the magnetic flux can be enhanced.

  In any of the first invention and the second invention, it is preferable that at least one of the field coil and the armature coil is formed of a superconducting wire.

  A predetermined gap is provided between the field coil and each inductor or between each inductor and the armature coil, so that the magnetic resistance increases and a leakage flux that flows in an unexpected direction is generated. Thus, the case where the magnetic flux contributing to the output is small can be considered. Therefore, by forming one or both of the field coil and the armature coil with a superconducting wire, it becomes possible to supply a large current without fear of heat generation, and the generated magnetic flux can be greatly enhanced. Therefore, even if leakage magnetic flux is generated, since the entire magnetic flux is increased, the magnetic flux contributing to the output is also increased, and high output can be achieved. Moreover, since a large current density is obtained by achieving superconductivity, each coil can be made small, and the motor can be reduced in size and weight.

  In addition, even if a structure for cooling the superconducting wire is provided in order to exhibit the required superconducting performance, both the field coil and the armature coil are fixedly arranged and do not rotate as described above. In addition, the design of the seal structure and the like can be simplified, and the cooling structure can be simplified.

The cross-sectional areas of the first inductor and the second inductor are preferably constant from one end to the other end.
With this configuration, the magnetic flux generated in the field coil and introduced into each inductor is less likely to be saturated in the inductor, so that the magnetic flux can be efficiently guided to the armature coil.

The cross-sectional area of the first inductor and the cross-sectional area of the second inductor are preferably substantially the same.
With the above configuration, by making the cross-sectional area of each inductor uniform, the attraction / repulsion force generated between the inductor and the armature coil becomes constant, and the rotation balance of the rotor can be stabilized.

  As is clear from the above description, according to the present invention, the field coil or armature for generating the magnetic poles on the outer periphery of the rotor is fixedly arranged without rotating. It is no longer necessary to use a sliding contact member such as a slip ring for power supply to the power supply, and the structure can be simplified, and the problem of life reduction and unstable power supply due to contact wear on the slip ring or the like can be solved.

Embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a first embodiment.
In the radial gap type motor 10 of the present embodiment, the rotor 11 is fitted and fixed to the drive shaft 13, and the field coil 18 embedded in the yoke 17 is fixedly arranged on the side of the rotor 11 in the axial direction, and rotated. The child 11 and the field coil 18 are surrounded by a stator 12 having a cylindrical cross section.

As shown in FIGS. 1 and 2, the yoke 17 is fixed to the wall surface of the stator 12 with a gap around the drive shaft 13 and driven with a large amount of axial protrusion toward the rotor 11. A small-diameter cylindrical portion 17a loosely fitted on the shaft 13, an annular portion 17b projecting radially from the rear edge of the small-diameter cylindrical portion 17a, and projecting toward the rotor 11 from the outer peripheral end of the annular portion 17b; A large-diameter cylindrical portion 17c having a small protruding amount. The yoke 17 is made of, for example, a magnetic material such as a permender, a silicon steel plate, iron, permalloy, or a dust magnetic material.
An annular heat insulating refrigerant container 19 is accommodated in an annular recess formed by the small diameter cylindrical portion 17a, the annular portion 17b and the large diameter cylindrical portion 17c of the yoke 17, and a refrigerant such as liquid nitrogen is contained inside the heat insulating refrigerant container 19. In addition, a field coil 18 made of a superconducting wire is accommodated. That is, one field coil 18 is arranged in an annular shape around the axis. The heat insulating refrigerant container 19 has a vacuum heat insulating structure in which a vacuum layer is interposed between double walls. The field coil 18 is made of a superconducting wire such as bismuth or yttrium.

As shown in FIG. 3, the rotor 11 includes a support portion 14 made of a nonmagnetic material that is fitted and fixed to the drive shaft 13, and first inductors that are alternately attached to the outer peripheral surface of the support portion 14 in the circumferential direction. 15 and a second inductor 16.
As shown in FIG. 1, the first inductor 15 includes a flat plate portion 15 a attached to the outer peripheral surface of the support portion 14, and a small-diameter cylinder having a yoke 17 projecting from the flat plate portion 15 a sideways in an L shape. And a protrusion 15b adjacent to the portion 17a.
As shown in FIG. 2, the second inductor 16 includes a flat plate portion 16 a attached to the outer peripheral surface of the support portion 14, and a large-diameter cylindrical portion 17 c that extends sideways from the flat plate portion 16 a and has a tip at the yoke 17. And a projecting portion 16b that is in close proximity to.

The first inductor 15 and the second inductor 16 have a constant cross-sectional area from one end on the projecting portions 15b and 16b side to the other end on the flat plate portions 15a and 16a side. The cross-sectional areas of the first inductor 15 and the second inductor 16 are substantially the same.
In addition, each inductor 15 and 16 is formed with magnetic bodies, such as a permender, a silicon steel plate, iron, a permalloy, and a dust magnetic body, for example. Moreover, the support part 14 is formed with nonmagnetic materials, such as FRP, for example.

The stator 12 includes a housing section 20 having a cylindrical section that surrounds the rotor 11, the field coil 18, and the like, bearings 21 and 22 that rotatably support a drive shaft 13 that passes through the housing section 20, and a housing section 20. Are provided with an armature coil 23 made of a superconducting wire attached at equal intervals in the circumferential direction on the inner peripheral surface side, and a heat insulating refrigerant container 24 for housing the armature coil 23.
The heat insulating refrigerant container 24 has a vacuum heat insulating structure in which a vacuum layer is interposed between double walls, and a refrigerant such as liquid nitrogen is supplied to the inside. The armature coil 23 is made of a superconducting wire such as bismuth or yttrium.

  The field coil 18 is supplied with a direct current from a power supply device (not shown) to serve as a field, and the armature coil 23 is supplied with an alternating current from a power supply device (not shown) to serve as an armature. Moreover, the coils 18 and 23 are kept at a very low temperature by circulating and supplying a refrigerant such as liquid nitrogen to the heat insulating refrigerant containers 19 and 24 through a cooling pipe (not shown).

Next, the operation principle of the radial gap type motor 10 will be described.
When direct current is fed to the field coil 18, for example, an N pole is generated on the inner peripheral side and an S pole is generated on the outer peripheral side. As a result, as shown in FIG. 1, the magnetic flux on the N pole side is introduced into the first inductor 15 from the small-diameter cylindrical portion 17a of the yoke 17 through the protruding portion 15b, and the flat plate portion 15a facing the armature coil 23. N pole magnetic flux appears. Further, as shown in FIG. 2, the magnetic flux on the S pole side is introduced into the second inductor 16 from the large-diameter cylindrical portion 17 c of the yoke 17 through the protruding portion 16 b and faces the armature coil 23. S pole magnetic flux appears in
From this state, if alternating current is supplied to the armature coil 23 to periodically excite reverse magnetism in the circumferential direction, an attractive / repulsive force is generated between the armature coil 23 and the inductors 15 and 16. The rotor 11 rotates and the drive shaft 13 is driven.

  With the above configuration, both the armature coil 23 and the field coil 18 do not rotate, and only the rotor 11 to which the inductors 15 and 16 are attached rotates with the drive shaft 13. A sliding contact member such as a slip ring is not required for power supply to the power supply, which simplifies the power supply structure and stabilizes the power supply and contributes to extending the life of the motor. In addition, since the heat insulating refrigerant containers 19 and 24 to which a refrigerant such as liquid nitrogen is supplied are also fixed and do not rotate, the design of a cooling pipe (not shown), a seal structure, and the like can be facilitated, and the cooling structure can be simplified.

4 to 6 show a third embodiment.
The difference from the first embodiment is that the drive shaft 13 made of a magnetic material is used for magnetic flux induction.

As shown in FIGS. 4 and 5, the yoke 35 of the radial gap motor 30 of the present embodiment is a circle fixed to the wall surface of the stator 12 with a gap around the drive shaft 13 made of a magnetic material. An annular portion 35a and a cylindrical portion 35b projecting toward the rotor 31 from the outer peripheral end of the annular portion 35a are provided. The yoke 35 is made of, for example, a magnetic material such as a permender, a silicon steel plate, iron, permalloy, or a dust magnetic material.
An annular heat insulating refrigerant container 19 is accommodated in an internal space formed by the annular portion 35a and the cylindrical portion 35b of the yoke 35, and a field coil made of a superconducting wire together with a refrigerant such as liquid nitrogen inside the heat insulating refrigerant container 19. 18 is housed.

As shown in FIG. 6, the rotor 31 has a first inductor 32 protruding in the four radial directions from the outer peripheral surface of the drive shaft 13, and a nonmagnetic material disposed so as to fill a space other than the first inductor 32. The support part 33 which consists of a body and the 2nd inductor 34 attached between the 1st inductors 32 on the outer peripheral surface of the support part 33 are provided.
As shown in FIG. 4, the first inductor 32 has a radially inner end 32 a connected to the drive shaft 13, and a radially outer other end 32 b facing the armature coil 23.
As shown in FIG. 5, the second inductor 34 includes a flat plate portion 34 a attached to the outer peripheral surface of the support portion 33, a side portion extending from the flat plate portion 34 a, and a tip close to the cylindrical portion 35 b of the yoke 35. Projecting portion 34b.

The first inductor 32 has a constant cross-sectional area from one end 32a to the other end 32b. The second inductor 34 has a constant cross-sectional area from one end on the protruding portion 34b side to the other end on the flat plate portion 34a side. Further, the cross-sectional areas of the first inductor 32 and the second inductor 34 are substantially the same.
Each of the inductors 32 and 34 is made of, for example, a magnetic material such as a permender, a silicon steel plate, iron, permalloy, or a dust magnetic material. Moreover, the support part 33 is formed with nonmagnetic materials, such as FRP, for example. Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

Next, the operation principle of the radial gap type motor 30 will be described.
When direct current is fed to the field coil 18, for example, an N pole is generated on the inner peripheral side and an S pole is generated on the outer peripheral side. As shown in FIG. 4, the magnetic flux on the N pole side is introduced into the first inductor 32 via the drive shaft 13 made of a magnetic material, and the N pole magnetic flux appears at the other end portion 32 b facing the armature coil 23. . Further, as shown in FIG. 5, the magnetic flux on the S pole side is introduced into the second inductor 34 from the cylindrical portion 35 b of the yoke 35 through the protruding portion 34 b, and S is applied to the flat plate portion 34 a facing the armature coil 23. Polar magnetic flux appears.
From this state, when AC power is supplied to the armature coil 23 and the reverse magnetism is periodically and alternately excited in the circumferential direction, an attractive / repulsive force is generated between the armature coil 23 and the inductors 32 and 34. The rotor 31 rotates and the drive shaft 13 is driven.

  With the above configuration, the N pole magnetic flux generated on the inner peripheral side of the field coil 18 can be guided to the second inductor 32 using the drive shaft 13 made of a magnetic material. There is no need to arrange a yoke on the side, and the motor 30 is reduced in diameter as a whole.

7 and 8 show a third embodiment.
The difference from the second embodiment is that one end portion 41a of the drive shaft 41 is disposed inside the stator 42 and is in a cantilever state.

  The stator 42 of the radial gap type motor 40 according to the present embodiment rotatably supports a cylindrical housing section 43 surrounding the rotor 31 and the field coil 18 and the like, and a drive shaft 41 penetrating the housing section 43. Bearing 21, armature coil 23 made of a superconducting wire attached at an equal interval in the circumferential direction on the inner peripheral surface side of housing portion 43, and heat insulating refrigerant container 24 for housing armature coil 23. Yes.

As shown in FIGS. 7 and 8, the yoke 44 is a disc-shaped magnetic body, and an annular groove 44a is formed on the surface facing the rotor 31, and is formed in a cylindrical shape on the outer peripheral side of the annular groove 44a. The outer peripheral cylindrical portion 44b and the central portion 44c formed in a columnar shape are provided on the inner peripheral side of the annular groove 44a. An annular heat insulating refrigerant container 19 is accommodated in the annular groove 44 a of the yoke 44, and a field coil 18 made of a superconducting wire together with a refrigerant such as liquid nitrogen is accommodated inside the heat insulating refrigerant container 19.
Since other configurations are the same as those of the second embodiment, the same reference numerals are given and description thereof is omitted.

Next, the operation principle of the radial gap type motor 40 will be described.
When direct current is fed to the field coil 18, for example, an N pole is generated on the inner peripheral side and an S pole is generated on the outer peripheral side. As shown in FIG. 7, the magnetic flux on the N pole side is introduced into the first inductor 32 from the central portion 44 c of the yoke 44 through the drive shaft 13 made of a magnetic material, and is opposed to the armature coil 23. An N-pole magnetic flux appears at 32b. Further, as shown in FIG. 8, the magnetic flux on the S pole side is introduced into the second inductor 34 from the outer peripheral cylindrical portion 44 b of the yoke 44 through the protruding portion 34 b, and is applied to the flat plate portion 34 a facing the armature coil 23. S pole magnetic flux appears.
From this state, when AC power is supplied to the armature coil 23 and the reverse magnetism is periodically and alternately excited in the circumferential direction, an attractive / repulsive force is generated between the armature coil 23 and the inductors 32 and 34. The rotor 31 rotates and the drive shaft 13 is driven.

9 and 10 show a fourth embodiment.
The difference from the first embodiment is that no yoke is provided on the inner and outer peripheries of the field coil 18 and the heat insulating refrigerant container 19.

In the radial gap type motor 50 of this embodiment, an annular heat-insulating refrigerant container 19 containing a field coil 18 around an axis made of a superconducting wire is directly fixed to the wall surface of the housing portion 20 of the stator 12.
The rotor 51 includes a support portion 14 made of a non-magnetic material that is fitted and fixed to the drive shaft 13, and a first inductor 52 and a second inductor 53 that are alternately attached to the outer peripheral surface of the support portion 14 in the circumferential direction. And.
As shown in FIG. 9, the first inductor 52 includes a flat plate portion 52 a attached to the outer peripheral surface of the support portion 14, a reduced diameter portion 52 b that protrudes laterally in an L shape from the flat plate portion 52 a, and a reduced size. A projecting portion 52 c that protrudes laterally from the inner peripheral end of the diameter portion 52 b and that has a tip close to the inner peripheral side of the field coil 18 is provided.
As shown in FIG. 10, the second inductor 53 includes a flat plate portion 53 a attached to the outer peripheral surface of the support portion 14, a side extending from the flat plate portion 53 a, and a distal end on the outer peripheral side of the field coil 18. And a projecting portion 53b adjacent to each other.
The first inductor 52 and the second inductor 53 have a constant cross-sectional area from one end on the projecting portions 52c, 53b side to the other end on the flat plate portions 52a, 53a side. Further, the cross-sectional areas of the first inductor 52 and the second inductor 53 are substantially the same.
Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

Next, the operation principle of the radial gap type motor 50 will be described.
When direct current is fed to the field coil 18, for example, an N pole is generated on the inner peripheral side and an S pole is generated on the outer peripheral side. As shown in FIG. 9, the magnetic flux on the N pole side is introduced into the first inductor 52 via the protruding portion 52 c, and the N pole magnetic flux appears on the flat plate portion 52 a facing the armature coil 23. Further, as shown in FIG. 10, the magnetic flux on the S pole side is introduced into the second inductor 53 via the protruding portion 53 b, and the S pole magnetic flux appears on the flat plate portion 53 a facing the armature coil 23.
From this state, when alternating current is supplied to the armature coil 23 to periodically excite reverse magnetism in the circumferential direction, an attractive / repulsive force is generated between the armature coil 23 and the inductors 52 and 53. The rotor 51 rotates and the drive shaft 13 is driven.

  If it is set as the above structure, since the yoke is not provided in the inner and outer periphery of the field coil 18 and the heat insulation refrigerant | coolant container 19, the motor 50 can be reduced in weight as a whole.

11 and 12 show a fifth embodiment.
The difference from the first embodiment is that a plurality of rotors 11 are attached to one drive shaft 13.

  In the radial gap type motor 60 of this embodiment, two rotors 11 are fitted and fixed to a drive shaft 13, and a pair of field coils 18 embedded in a yoke 63 are fixedly disposed between the two rotors 11. Each rotor 11 and each field coil 18 are surrounded by a stator 61 having a cylindrical cross section.

The yoke 63 is fixed to the wall surface of the stator 61 with a gap around the drive shaft 13, and has a small projecting amount in the axial direction toward the rotor 11 on both sides and a small diameter that is loosely fitted to the drive shaft 13. A cylindrical portion 63a, an annular portion 63b projecting radially from an intermediate portion of the small-diameter cylindrical portion 63a, and projecting from the outer peripheral end of the annular portion 63b toward the rotors 11 on both sides and having a small projecting amount A diameter cylindrical portion 63c.
An annular heat-insulating refrigerant container 19 is accommodated in each of the pair of annular recesses on both sides formed by the small-diameter cylindrical portion 63a, the annular portion 63b, and the large-diameter cylindrical portion 63c of the yoke 63. A field coil 18 made of a superconducting wire is housed together with a refrigerant such as liquid nitrogen. That is, the two field coils 18 are arranged in an annular shape around the axis.

  The rotor 11 has the same structure as that of the first embodiment, and a first support portion 14 made of a non-magnetic material that is externally fixed to the drive shaft 13 and a first outer portion that is alternately attached to the outer peripheral surface of the support portion 14 in the circumferential direction. An inductor 15 and a second inductor 16 are provided.

  The stator 61 includes a housing section 62 having a cylindrical section that surrounds the pair of rotors 11, the field coils 18, and the like, bearings 21 and 22 that rotatably support the drive shaft 13 that penetrates the housing section 62, and a pair of stators 61. Corresponding to each of the rotors 11, the armature coil 23 made of a superconducting wire attached to the inner peripheral surface side of the housing portion 62 at equal intervals in the circumferential direction, and a heat insulating refrigerant container for housing the armature coil 23 24. The housing part 62 is provided with an annular projecting part 62a projecting radially inward at the center position, and a yoke 63 is fixed to the inner peripheral surface of the projecting part 62a.

  The field coil 18 is supplied with a direct current from a power supply device (not shown) to serve as a field, and the armature coil 23 is supplied with an alternating current from a power supply device (not shown) to serve as an armature. Moreover, the coils 18 and 23 are kept at a very low temperature by circulating and supplying a refrigerant such as liquid nitrogen to the heat insulating refrigerant containers 19 and 24 through a cooling pipe (not shown).

  With the above configuration, since the plurality of rotors 11 are attached to one drive shaft 13, the output torque of the motor 60 can be increased. In the present embodiment, two rotors 11 are provided, but three or more may be provided.

FIG. 13 shows a sixth embodiment.
In the sixth embodiment, the arrangement of the field coil 18 and the armature coil 23 of the first embodiment is reversed.
In the radial gap type motor 70 of the sixth embodiment, the rotor 11 is fitted and fixed to the drive shaft 13, and the armature coil 23 embedded in the yoke 17 is fixedly arranged on the side of the rotor 11 in the axial direction. A rotor 11, an armature coil 23, and the like are surrounded by a stator 12 having a cylindrical cross section.

  Similar to the first embodiment, the yoke 17 is fixed to the wall surface of the stator 12 with a gap around the drive shaft 13. An annular heat insulating refrigerant container 19 is accommodated in the annular recess of the yoke 17, and an armature coil 23 made of a superconducting wire together with a refrigerant such as liquid nitrogen is accommodated inside the heat insulating refrigerant container 19.

As in the first embodiment, the rotor 11 has a support portion 14 made of a nonmagnetic material that is fitted and fixed to the drive shaft 13, and a first portion that is alternately attached to the outer peripheral surface of the support portion 14 in the circumferential direction. An inductor 15 and a second inductor 16 are provided.
A field coil 18 made of a superconducting wire is provided on the inner peripheral surface side of the housing portion 20 of the stator 12 at equal intervals in the circumferential direction, and the field coil 18 is accommodated in a heat insulating refrigerant container 24.

The field coil 18 is supplied with direct current from a power supply device, and the armature coil 23 is supplied with alternating current from the power supply device.
Also in the radial gap type motor 70, when a direct current is supplied to the field coil 18 and an alternating current is supplied to the armature coil 23, an attractive / repulsive force is generated between the armature coil 23 and the inductors 15 and 16. Then, the rotor 11 rotates and the drive shaft 13 is driven.

  Even in the case of the configuration of the sixth embodiment, both the armature coil 23 and the field coil 18 do not rotate, and only the rotor 11 to which the inductors 15 and 16 are attached rotates with the drive shaft 13. A sliding contact member such as a slip ring is not required for power supply to each of the coils 18 and 23, the power supply structure can be simplified and the power supply can be stabilized, and the life of the motor can be extended.

It is sectional drawing of the radial gap type motor of 1st Embodiment of this invention. It is sectional drawing in the position rotated 45 degrees. It is sectional drawing of an orthogonal direction with respect to the axis line of a rotor. It is sectional drawing of the radial gap type motor of 2nd Embodiment. It is sectional drawing in the position rotated 45 degrees. It is sectional drawing of an orthogonal direction with respect to the axis line of a rotor. It is sectional drawing of the radial gap type motor of 3rd Embodiment. It is sectional drawing in the position rotated 45 degrees. It is sectional drawing of the radial gap type motor of 4th Embodiment. It is sectional drawing in the position rotated 45 degrees. It is sectional drawing of the radial gap type motor of 5th Embodiment. It is sectional drawing in the position rotated 45 degrees. It is sectional drawing of the radial gap type motor of 6th Embodiment. It is drawing which shows a prior art example.

Explanation of symbols

10, 30, 40, 50, 60, 70 Radial gap type motor 11, 31, 51 Rotor 12, 42, 61 Stator 13, 41 Drive shaft 14, 33 Support portion 15, 32, 52 First inductor 16, 34, 53 Second inductor 17, 35, 44, 63 Yoke 18 Field coil 19, 24 Insulating refrigerant container 23 Armature coil

Claims (7)

In the radial gap type motor in which the stator is arranged with a gap in the radial direction with respect to the rotor fitted and fixed to the drive shaft,
Armature coils that are alternately magnetized in the circumferential direction are fixedly arranged on the inner peripheral surface of the stator, and are wound in an annular shape around the axis on the side in the axial direction of the rotor. One field coil is fixedly arranged,
The rotor has a first inductor made of a magnetic material having one end face facing a magnetic pole generated on the inner peripheral side of the field coil and the other end face facing the armature coil, and one end face being the field. A radial gap type characterized in that second inductors made of a magnetic material facing the magnetic poles generated on the outer peripheral side of the magnetic coil and having the other end face opposed to the armature coil are alternately arranged in the circumferential direction. motor. In the radial gap type motor in which the stator is arranged with a gap in the radial direction with respect to the rotor fitted and fixed to the drive shaft,
A field coil that is alternately magnetized in the circumferential direction is fixedly arranged on the inner circumferential surface of the stator, and is wound in an annular shape around the axis on the side in the axial direction of the rotor. One armature coil is fixedly arranged,
The rotor has a first inductor made of a magnetic material having one end surface facing a magnetic pole generated on the inner peripheral side of the armature coil and the other end surface facing the field coil, and one end surface of the rotor A radial gap type characterized in that second inductors made of a magnetic material facing the magnetic poles generated on the outer peripheral side of the child coil and having the other end face opposed to the field coil are alternately arranged in the circumferential direction. motor. The armature coil or the field coil, wherein the drive shaft is a magnetic body, and the first inductor has one end surface connected to the drive shaft and the other end surface fixed to the inner peripheral surface of the stator. Is opposed to
The magnetic pole generated on the inner peripheral side of the field coil or the armature coil arranged on the side of the rotor in the axial direction is configured to be guided to the first inductor via the drive shaft. The radial gap type motor according to claim 1 or 2.   The yoke which consists of magnetic bodies is arrange | positioned at the inner peripheral side or / and outer peripheral side of the said field coil or the said armature coil arrange | positioned at the side of the axial direction of the said rotor. 4. A radial gap motor according to any one of items 3 to 3.   The radial gap motor according to any one of claims 1 to 4, wherein at least one of the field coil and the armature coil is formed of a superconducting wire.   The radial gap motor according to any one of claims 1 to 5, wherein a cross-sectional area of the first inductor and the second inductor is constant from one end to the other end.   The radial gap motor according to any one of claims 1 to 6, wherein a cross-sectional area of the first inductor and a cross-sectional area of the second inductor are substantially the same.

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