WO2013104757A1 - Inductive energy transfer device - Google Patents

Description

 Inductive energy transformer

description

The invention relates to an inductive

Energy exchanger for electrical equipment, which are plugged side by side on an elongated holding device and which are equipped with at least one coil for generating or receiving an alternating magnetic field. Under the transmission of energy and the transmission of signals, eg. As data understood.

For galvanically isolated power supply

Transformers or energy transformers used with primary coil and secondary coil, usually a

ferromagnetic or ferrimagnetic core for

Flow bundling included. If it is the

Power supply of separate devices or modules

is also the ferromagnetic or

ferrimagnetic core when forming a core gap on primary coil and secondary coil divided (WO98 / 15069, EP 1 885 085 AI, DE 10 2007 060 811 AI and DE 10 2007 061 610 B4). In such a design, the

Contactless energy transfer with a relatively high efficiency. However, this sets a precise spatial

Assignment of the primary coil to the secondary coil ahead, whereby the freedom of the spatial positioning of the

Power supply via the primary coil to the

Power receiving device with secondary coil is severely limited. In order to get rid of this restriction of the spatial positioning, US Pat. No. 7,262,700 B2 and US 2010/01328044 A1 propose a power supply unit with

Provide table surface on which flat coils are arranged as primary coils, with the secondary

 Flat coils of the energy receiving devices or modules work together to supply the power

accomplish. The receiving device with the secondary coil is mobile and can be coupled to any one of the primary coils at any position on the tabletop of the power supply. The effective magnetic field lines between primary coil and secondary coil are perpendicular to the table surface. EP 2 067 148 B1 discloses a charger for transmitting electromagnetic energy to a large number of sources

loading receiving devices, namely, a plurality of overlapping, flat primary coils are provided along a rail-like support, the presence of a secondary coil of a sensor by means of a sensor

 Detect receiving device and accordingly activate primary flat coils selectively. The effective magnetic field lines between primary coil and secondary coil are perpendicular to the rail surface.

US 2003/0210106 A1 shows a system of inductive coupling between a plate-shaped primary side of the transmitting device and a secondary side of the receiving device constructed with helical turns. The primary side has one

Flat winding on, in which the windings run spirally or in a rectangular shape nested to an inductive coupling over a table surface with the Receiving device to enable its position and

Alignment within an active area of the

Table surface is freely selectable. In this active region, the magnetic field lines are substantially parallel to the table surface. The secondary side has a helical winding around a plate-shaped or cylindrical core.

With WO2010 / 125048 AI a system for contactless data and power supply of bus subscriber modules is known, wherein a mounting base is provided with a hat-shaped rail, in the space between which extends a supply rail, which is a spiral

Flat coil carries, which generates a magnetic induction field with an effective proportion perpendicular to the longitudinal extent of the supply rail.

With DE 10 2007 046 054 AI a Rogowski current transformer is known, which comprises a printed circuit board with a plurality of stacked discrete substrate layers. A first coil is at least three of the discrete ones

Substrate layers wound around and a second coil passes through the center of the first coil. Such a Rogowski current transformer is used to measure the current in a conductor, but is not part of an inductive transformer for the purpose of powering

electrical equipment provided.

Electrotechnical devices are often housed in control cabinets and often attached along with mounting rails. In many cases, a galvanic isolation between the power supply and the user or end devices required. Although such utility or end devices are adapted with their base to the support rail, but come in terms of the dimension in the longitudinal direction of the rail

considerable differences. In narrow-built devices, the opposite in the holding rail surface is quite small, so that the inductive coupling between the

Power supply and the user or terminal appears problematic. The invention has for its object to provide an inductive energy exchanger, in which there is a certain freedom of spatial positioning of the primary coil to the secondary coil for the purpose of power supply of electrical

There are devices that are to be fastened along an elongate holding device.

In particular, a coil form is provided which is particularly suitable for an inductive power transformer having an elongate holding device. In order for a power supply even for quite narrow built user or terminal devices can be provided, which are strung together along the longitudinally extending holding device and are thereby contactlessly supplied with electrical energy and / or data.

In the case of an inductive energy exchanger, a coil is provided to generate or receive an alternating magnetic field parallel to a longitudinally extending holding device. The coil is comprised of a first plate for receiving first helix coil elements, a second plate parallel to the first plate for receiving second helical coil elements and a connection structure which extends between first and second plates and provides connection helix coil elements, so that the turns of the coil results in a helical structure with sections of straight conductor sections. Such a current-carrying helix coil generates magnetic field lines which are parallel to the inside of the coil

Coil axis extend, then bend at one end of the coil, extending along the coil shell and bend again at the other coil end to the coil axis. A portion of the field parallel or nearly parallel to

Longitudinal extension of the holding device outside the

Primary coil can be used as a usable portion of the magnetic field in the energy transfer from primary to

Secondary coil can be exploited.

According to a preferred embodiment of the invention, the first and the second plate are formed with thereon or therein attached conductor tracks, and the

Connection structure contains conductor elements, which are the conduction paths in the sense of forming a helical

Complete the coil. In this embodiment, the coil of prefabricated panels or plate-like structures can be modular. In detail, the connection structure may include two mutually parallel rung bars or pin headers. But it is also possible to use a closed connection structure (without openings), in which case the two plates and the two-part

Connection structure to complement a box-shaped hollow profile. In the design as a hollow profile are manifold

Modifications possible. So it is possible the

 Connecting structure in conjunction with one of the two plates to produce a U-profile, which is covered with the other plate. Another possibility is to produce a part of the connecting structure with the one plate and the other part of the connecting structure with the second plate in a composite, so that two L-shaped structures arise, which are stacked together to form the box-like structure.

In particular, if one of the plates as a printed

Circuit board is executed, can be applied to the plate with an electronic control system to operate the coil with adapted frequencies and current amplitudes. The control electronics can also be accommodated in the intermediate space of the plates or the connection structure.

The coil is fixed to a holding device, which is usually rail-like and often made of metal. Therefore, between coil and

Holding device arranged a shielding device.

Embodiments of the invention will be described with reference to FIGS

Drawing described. Showing:

Fig. 1 shows an energy transformer schematized in

perspective view and in side view, Fig. 2 shows a coil of two printed circuit boards and

Pin headers or rung bars constructed, Fig. 3 is a box-shaped coil, and

4 shows a power transmission arrangement. The preferred coils according to the invention are made of a first plate 1, a second plate 2 and a

Connecting structure 3, 4 constructed to a hollow

Cuboid shape. The sidewalls of the cuboid are either closed (Fig. 3) or partially open (Fig. 2). In the application as a primary coil PI, the plates 1, 2 extend parallel to an elongate holding device 5, which may be formed as a metal rail. Between the lower plate 2 and the holding device 5 extends a shield 6, preferably made of ferrite.

The plates 1, 2 and the two-part connection structure 3, 4 each contain an insulating base body 10, 20, 30, 40 and conductive coil elements 11, 21, 31, 41.

Assembled result in the plates 1, 2 and the

Connecting structure 3, 4, the elongated hollow cuboid shape, near the surface of which the coil extends as a helix coil, which is composed of the coil elements 11, 21, 31, 41. In the design according to FIG. 2, the plates 1 and 2 consist of printed circuit boards whose "etched" or imprinted

Conductor tracks represent the coil elements 11 and 21, respectively. In the plate 1, the tracks are slanted on the

Plane level arranged in the plate 2, however, transversely to the longitudinal extent of the plate 2. The conductor tracks 11 are provided at their ends with contact holes 13 and 14 and the conductor tracks 21 with contact holes 23 and 24. In Fig. 1, the connecting structures 3, 4 are designed as pin headers or rung ladder, a number of

Contain contact pins as the coil elements 31 and 41, respectively, to electrically connect the contact bores 13, 23 and 14, 24 with each other. In this way, the

helical coil formed from the coil elements 11, 21, 31, 41. A trace 12 leads the left end of the coil to a connection point 15 adjacent to the connection point 16 of the coil. These connection points 15, 16 are connected to a control device 7, which is designed as a printed circuit.

Fig. 3 shows a variant of the helical coil, wherein like components are denoted by the same reference numerals. The two plates 1 and 2 and the two-part connection structure 3, 4 complement each other

box-shaped hollow profile whose main body 10, 20, 30, 40 made of electrically insulating material. In the

Embodiment of FIG. 3 is formed from the parts 2, 3 and 4, a U-profile, which by the first plate. 1

is closed. But it is also possible to form each of the parts 1 and 3 and 2 and 4 respectively an L-profile, which form the hollow profile lying on top of each other. Around the surface of the hollow profile, the coil elements 11, 21, 31, 41 extend, which together

form a helical coil. The coil can be made in MID technology (Molded Interconnect Devices), wherein the coil elements are within the walls of the

extend box-shaped hollow profile. But there are also other ways of making possible, even the winding of the box-shaped, from the insulating bodies

existing hollow profile is possible. The novel coil is provided as an element in an inductive energy exchanger, which serves to supply energy to a plurality of devices to be supplied, which are arranged next to one another in a row on the holding device 5

are attached. Therefore, there are several to each other

aligned primary coils PI, P2 ... on the

 Holding device, as indicated in Fig. 3 with a primary coil P2 shown aborted. Such

juxtaposed primary coils PI, P2 can be interconnected to form a single virtual coil, and serve for this purpose contact points 17, 18 of the primary coil PI, wherein the contact points 18 with contact points 19 of

Primary coil P2 work together. In the exterior or interior of the box-shaped hollow profile are circuits for power supply, for connection and separation of adjacent primary coils and control electronics to supply the coils currents with the appropriate frequencies and amplitudes. These circuits are symbolic at 7

outlined.

Fig. 1 shows a schematic representation of an inductive energy exchanger with a primary coil PI and a

Secondary coil Sl in perspective and in side view. The primary coil PI is a helix coil whose axis is parallel to the holding device 5 and above it. The outline of the primary coil may be cylindrical, but preferably the box shape of Fig. 2 and 3 is applied, since this conforms to the shape of the DIN rail 5. The secondary coil Sl may be a flat coil with a spiral winding in a plane perpendicular to the axis of

Primary coil PI stands. But it is also possible, one Secondary coil in box form according to FIGS. 2 and 3 apply.

If the primary coil PI is suitably excited, an alternating magnetic field is produced, to which several field lines H1, H2, H3, H4 are drawn. The field line Hl has a parallel to the z-axis share when passing through the

Secondary coil Sl. This horizontal course of the field line is the useful part of the alternating field and leads to

corresponding induced voltages and currents in the secondary coil Sl. To increase the efficiency of the transformer thus formed, a ferromagnetic or ferrimagnetic core can be provided for the primary coil PI, which extends along the marked field line H1, but leaves a sufficiently wide air gap in the horizontal course to accommodate the secondary coil Sl.

The secondary coil Sl is arranged in a device to be supplied, which sits on the holding device 5 in addition to other devices to be supplied and to be supplied with electrical isolation during electrical isolation. When using a flat secondary coil Sl, the device to be supplied can be built very narrow, the capture cross section of the secondary coil Sl thanks to the horizontal curve Hl of the field lines is sufficiently large to couple enough energy into the secondary coil. Thus, the coil form of the primary coil PI is a valuable component in the construction of an inductive energy exchanger, which can also act on narrow-built, to be supplied devices.

If the requirement of the narrow design omitted, the novel coil can also be used as a secondary coil in Receiving devices are used. It can be a

Cross-sectional shape of the secondary coil can be selected, which is the paired - or multiple - arrangement of coils

next to each other allows, at the largest possible

Capture surface of the coil, the space above the primary coil largely exploit, as in a sectoral

Cross section of the coil is possible. In the semicircle around a cylindrical primary coil, therefore, two or more secondary coils can be grouped sectorally and thus optimally utilize the alternating magnetic flux.

FIG. 4 shows a power transmission arrangement based on an electrical device 100 that is connected to the elongate one

Holding device 5 is attached and secured. On the holding device 5, a series of primary coils PI, P2, P3, P4 are arranged, each having a coil core 101, 102, 103 and 104 respectively. The coil cores are plate-shaped and have top and bottom sides, which are parallel to the main surfaces of the rail-like

Holding device 5 extend. The cross sections of the

plate-shaped coil cores are rectangular. Thus, the coil cores 101, 102, 103, 104 can be ranked very close together. For the primary coils PI, P2, P3, P4, the designs shown in FIGS. 2 and 3 can be used. It is also possible to wind the coil cores.

The electrical device 100 includes a device housing 110 and a circuit board 50 having a secondary coil S1 in communication with electronic components 51 (FIG. 1). The housing 110 is indicated in Fig. 4 only in the lower region, where it is used for attachment to the DIN rail of the holding device 5. A spool core 120 extends through the opening of the secondary coil Sl and cooperates with the coil core 101 of the primary coil PI. The coil core 120 of the secondary coil S1 expediently has the shape of a U-rail, the middle leg of which passes through the opening of the secondary coil S1 and its outer one

 Thighs reach to near the surface of the bobbin 101 of the primary coil PI. The remaining gap between the leg ends of the spool core 120 and the adjacent spool core 101 allows the electrical device 100 to be displaced and correctly aligned relative to the retainer 5 along the axial direction given by the rail of the retainer so that the magnetic field lines are short shut down.

While only one electrical device 100 is sketched in FIG. 4, a plurality of electrical devices can be placed next to one another on the holding device 5 and fastened. The devices 100 can assume different widths, measured in the axial direction of the rail of the holding device 5. Narrow devices have a width comparable to the width of the coil cores 101, 102, 103 or 104, while wide electrical devices can cover two or more of the coil cores 101, 102, 103, 104. In such a case, the covered coil cores of the primary side are interconnected to virtual coils, as has been described with FIG. 3.

In a modification of the energy transmission arrangement according to FIG. 4, the magnetic cores of the primary coils are combined to form a single coil core, which thus acts as a coil core

Plate along the holding device 5 extends and defines the area along which electrical devices 100th can be positioned. The pole pieces of such a coil core can up to the height of the secondary coils

unwound unwound to effectively bundle the horizontal portion of the alternating magnetic field to the secondary coils of the juxtaposed devices. In such a case, the magnetic cores of the secondary coils may be omitted.

In a further modification, the individual

Primary coils offset by half the length in two rows next to each other to get the best possible

To ensure coverage of the entire holding device for arbitrarily positioned secondary coils on the holding device.

It is still possible for the secondary coils

To provide two - piece magnetic cores with a dielectric gap in between, located in the region of

Secondary coil is located. The secondary coil will then not be punctured by a core.

Fig. 4 shows a schematic representation of only a short section of the holding device 5 for electrical equipment 100, such as those side by side in cabinets

be housed. The person skilled in the art is able to arrange a large number of the plate-like coil cores 101, 102, etc. for the primary coils PI, P2, etc. in a suitable manner along the rail 5 and the electrical devices 100 so to these coil cores 101, 102, etc. to arrange that the correct coupling between the coil cores of the primary coils and the secondary coils for arbitrary positioning along the holding device comes about.

Claims

claims 1. Inductive energy exchanger for electrical appliances, which are attachable side by side on an elongate holding device (5), comprising:  - At least one primary coil (PI) for generating an alternating magnetic field with proportion parallel to Longitudinal extent of the holding device (5),  - At least one secondary coil (Sl) for receiving the alternating magnetic field, wherein the secondary coil (Sl) belongs to the electrical device,  at least one coil core (101) extending at least partially through the coil opening of the primary coil (PI), - Wherein the primary coil (PI) and / or the secondary coil (Sl) comprises:  - A first plate (1) for receiving the first Helical coil elements (11),  a second plate (2) substantially parallel to the first plate for receiving second helix coil elements (21), a connection structure (3, 4) between first and second plates for forming or receiving connection helix coil elements (31, 41) between the first and second helix coil elements (11, 21), and - Wherein the helix coil elements (11, 21, 31, 41) to the primary coil (PI) and / or the secondary coil (Sl) put together. 2. Inductive energy exchanger according to claim 1, wherein the first and the second plate (1, 2) made insulating base bodies (10, 20) with thereon or therein attached conductor tracks (11, 21) are formed, and the Connection structure (3, 4) insulating base body (30, 40) for attachment of conductor elements (31, 41) which supplement the conductor paths in the sense of forming a helical coil. 3. Inductive energy exchanger according to claim 2, wherein the connecting structure (3, 4) contains two mutually parallel pin headers. 4. Inductive energy exchanger according to one of claims 1 to 3, wherein the first plate (1), the second plate (2) and the connecting structure (3, 4) complement each other to form a box-shaped hollow profile. 5. Inductive energy exchanger according to claim 4, wherein the second plate (2) is connected to the connecting structure (3, 4) to form a U-profile and the first plate (1) completes the U-profile to the box-shaped hollow profile. 6. Inductive energy exchanger according to claim 5, wherein the box-shaped hollow profile as insulating Spool support a helical winding is used, which generates the alternating magnetic field parallel to the first plate and in the longitudinal extent of the box-shaped hollow profile. 7. Inductive energy exchanger according to one of claims 1 to 6, wherein the first plate (1) having provided with contact points (17, 18) ends which for electrical connection are formed with adjacent coils (P2) in order to switch over two or more coils extending alternating magnetic field can. 8. Inductive energy exchanger according to one of claims 1 to 7, wherein between the second plate (2) and holding means (5) a ferromagnetic or ferrimagnetic plate (6) is arranged. 9. Inductive energy exchanger according to one of claims 1 - 8, wherein between the first and second plate (1, 2) and between the two parts of the connecting structure (3, 4) extends a cavity in which a coil core is included. 10. Inductive energy exchanger according to one of claims 1 to 9, wherein the first plate (1), the second plate (2) and the connecting structure (3, 4) or parts of these with their helical coil elements (11, 21, 31, 41) are made in MID technology. 11. Inductive energy exchanger according to one of claims 1 to 10, wherein one of the plates (1), or the cavity between the plates, includes control electronics (7) for generating time varying coil currents with frequencies and amplitudes that match adjusted induction currents in lead at least one secondary coil. 12. Inductive energy exchanger according to one of claims 1 to 11, wherein adjacent primary coils (PI, P2) are interconnectable to form a virtual total coil to operate in the longitudinal direction of wider electrical equipment can. 13. Inductive energy exchanger according to one of claims 1 - 12, wherein for a plurality of secondary coils, a single primary-side coil core of plate-like design and with pole shoes is provided to the magnetic Alternating field with proportion parallel to the longitudinal extent of the holding device to effectively bundle. 14. Inductive energy exchanger according to one of claims 1 to 13, wherein in addition to the coil core (101) of the primary coil (PI) or a coil core (120) of the secondary coil (Sl) is provided, which forms part of the electrical device and is arranged with this adjustable to the elongate holding means (5). 15. Inductive energy exchanger according to claim 14, the coil core (101) of the primary coil (PI) in the form of a plate with parallel to the holding device (5) extending upper and lower side and with a rectangular cross-section transverse to the longitudinal extent of the holding device (5), and wherein the coil core (120) of the secondary coil (Sl) has the shape of a U-rail, which passes through the coil opening of the secondary coil (Sl) and with their Thigh ends form surfaces that are at a close distance to the top of the spool core (101) of the primary coil (PI). 16. Inductive energy exchanger according to claim 14 or 15, wherein a number of coil cores (101, 102, 103, 104) occupied primary coils (PI, P2, P3, P4) a Power output part for a number of electrical Form devices and a number of coil cores (120) occupied secondary coils (Sl) form a power receiving part for the electrical equipment.