JP2015080324A - Non-contact power supply - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-contact power supply capable of preventing the reduction of power supply efficiency due to a position deviation between mutual coil units, with a miniaturized overall power supply.SOLUTION: A primary winding part 21 and a secondary winding part 31 are disposed in a movable manner by support means 22, 32 and motors 23, 33. According to a position deviation between a power supply side unit 2 and a power reception side unit 3, the primary winding part 21 and the secondary winding part 31 are relatively moved, to prevent the reduction of power supply efficiency. Even in a case that the positions of the power supply side unit 2 and the power reception side unit 3 deviate larger than the sum of the movable range of the primary winding part 21 and the secondary winding part 31, it is possible to obtain an effect by relative movement between the winding parts 21, 31, and to miniaturize the overall power supply.

Description

  The present invention relates to a non-contact power feeding device that supplies power from a power feeding side unit to a power receiving side unit.

  2. Description of the Related Art Conventionally, a non-contact power feeding device that corrects misalignment between winding portions by providing an iron core in a slidable manner has been proposed (see, for example, Patent Document 1). In the non-contact power feeding device described in Patent Document 1, as shown in FIG. 4, the primary side iron core 101 and the secondary side iron core 102 include protrusions 103 and 104 that protrude in the opposite direction, and the primary side iron core 101 has It is slidable in the left-right direction in FIG. When a lateral displacement occurs between the power supply side unit 105 and the power reception side unit 106 provided with the respective iron cores 101 and 102, the projecting portions 103 and 104 face each other (that is, substantially the same position in the lateral direction). Thus, the primary side iron core 101 slides to reduce the leakage magnetic flux and prevent the power supply efficiency from decreasing.

JP 2013-90392 A

  However, in the non-contact power feeding device described in Patent Document 1, since the magnetic flux passes from the primary side iron core 101 through the protruding portion 103 toward the protruding portion 104 of the secondary side iron core 102, the power feeding side unit 105 and the power receiving side unit 106. Is displaced more than the movable range of the primary side iron core 101, the magnetic flux goes farther than the configuration in which the protrusions 103 and 104 are not provided, and is directed toward the secondary side iron core 102. There was a possibility.

  Furthermore, in order to make the protrusions 103 and 104 face each other when a large positional deviation occurs, it is necessary to increase the horizontal dimension of the primary unit 105, and there is an inconvenience that the entire apparatus becomes large. It is done.

  An object of the present invention is to provide a non-contact power feeding device that can prevent a reduction in power feeding efficiency due to a positional shift and can downsize the entire device.

  A non-contact power feeding device of the present invention is a non-contact power feeding device that supplies power from a power feeding side unit to a power receiving side unit, and the power feeding side unit includes a primary side coil unit including a primary side winding portion. The power receiving side unit is configured to include a secondary coil unit including a secondary winding portion, and at least one of the power feeding side unit and the power receiving side unit is the primary side. A support means for slidably supporting the primary side winding part or the secondary side winding part in a direction crossing the opposing direction of the winding part and the secondary side winding part, and the primary side winding part Or a moving means for moving the secondary winding portion on the support means, and the moving means intersects the primary winding portion and the secondary winding portion. It is characterized by relative movement according to the positional deviation in the direction. .

  According to the present invention as described above, the primary winding portion and the secondary winding portion are moved relative to each other in accordance with the displacement of each other, so that the winding portions face each other, or Accordingly, it is possible to prevent a reduction in power supply efficiency, and it is not necessary to provide an iron core or to form a protrusion on the iron core, thereby simplifying the configuration of the apparatus. Furthermore, even when the primary side winding part and the secondary side winding part are misaligned more than the movable range, it is possible to obtain the effect by moving the winding parts relative to each other, By forming the power supply side unit and the power reception side unit so as to have an appropriate movable range, the entire apparatus can be reduced in size. The supporting means and the moving means may be any means that slides the winding portion in at least one direction among the directions intersecting the facing direction.

  At this time, in the non-contact power feeding device of the present invention, it is preferable that the power feeding side unit and the power receiving side unit include the support means and the moving means, respectively. According to such a configuration, the power supply side unit and the power reception side unit include the support means and the movement means, that is, the primary side winding part and the secondary side winding part are provided slidably. If the positional deviation is equal to or less than the sum of the movable range on the primary side and the movable range on the secondary side, the winding portions can be opposed to each other, and either one of the winding portions can be moved. In comparison, it is possible to prevent one of the power supply side unit and the power reception side unit from increasing in size in the slide direction (crossing direction).

  Furthermore, in the non-contact electric power feeder of this invention, while the said primary side coil unit and the said secondary side coil unit are each equipped with an iron core, the said primary side coil | winding part and the said secondary side are set by making the said crossing direction into an axial direction. Preferably, winding portions are formed around the iron core, and the support means supports the primary winding portion or the secondary winding portion so as to be slidable along the iron core.

  According to such a configuration, the support means supports the winding portion so as to be slidable along the iron core, whereby the inductance of the coil unit can be increased while preventing the configuration from becoming complicated. Further, the axial direction coincides with the direction intersecting the facing direction, that is, the winding part is provided so as to slide in the axial direction, so that the winding part can be easily slid along the iron core. Can do.

  Moreover, in the non-contact electric power feeder of this invention, it is preferable that the said primary side winding part and the said secondary side winding part are formed by making the said opposing direction into an axial direction. According to such a configuration, in the configuration in which the axial direction and the facing direction coincide with each other and the power feeding efficiency is likely to decrease due to the positional deviation between the winding portions in the direction intersecting these directions, at least of the intersecting directions. Since the winding part is slidably provided in one direction, it is possible to effectively prevent a reduction in power supply efficiency.

  According to the non-contact power feeding device of the present invention as described above, the primary side winding portion and the secondary side winding portion are moved relative to each other in accordance with the positional deviation, thereby preventing a reduction in power feeding efficiency. The entire apparatus can be reduced in size.

It is a perspective view which shows the non-contact electric power feeder which concerns on embodiment of this invention. It is operation | movement explanatory drawing of the said non-contact electric power feeder. It is a perspective view which shows the non-contact electric power feeder which concerns on the modification of this invention. It is a side view which shows the non-contact electric power feeder of a prior art.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the non-contact power feeding device 1 of the present embodiment includes a power feeding side unit 2 having a primary side winding portion 21, a power receiving side unit 3 having a secondary side winding portion 31, And a detecting means (not shown) for detecting the relative position between the side unit 2 and the power receiving side unit 3. The power receiving side unit 3 is provided in a vehicle (not shown) and connected to a battery. The power feeding side unit 2 is installed at an appropriate position in the parking space and connected to a power source (not shown). The battery is configured to be able to supply power from the power source via the power receiving side unit 3.

  The non-contact power feeding device 1 may be an electromagnetic induction method or a magnetic field resonance method provided with appropriate circuit elements. Further, the X direction, Y direction, and Z direction in the present embodiment are as shown in FIG. In FIG. 1, the power supply side unit 2 and the power reception side unit 3 face each other in the Z direction and are provided at substantially the same position in the XY plane, so that the primary side winding part 21 and the secondary side winding part 31 are positioned. They are facing straight. Furthermore, the power supply side unit 2 and the power reception side unit 3 are provided such that the X direction faces the width direction of the vehicle.

  The power supply side unit 2 includes a primary winding portion 21, support means 22 that slidably supports the primary winding portion 21, and a motor as a moving means that moves the primary winding portion 21 on the support means 22. 23, a primary winding part 21, a support means 22, a shield case 24 for housing the motor 23, and a control means (not shown) for controlling the motor 23 based on the detection result of the detection means. Has been.

  The primary side winding part 21 is formed by winding the electric wire 211 around the bobbin 212 in a spiral manner with the X direction as the axial direction. The bobbin 212 is supported so as to be slidable along the iron core 221 by being formed so as to surround a plate-like iron core 221 described later from the Y direction and the Z direction. The bobbin 212 is formed with a rack portion 212a that meshes with a gear 231 (described later) of the motor 23.

  The support means 22 includes a plate-shaped iron core 221 whose Z direction is the plate thickness direction, and a fixing portion 222 that fixes the iron core 221 to the shield case 24. The iron core 221 and the primary winding part 21 function as a primary coil unit.

  The motor 23 is provided to move the bobbin 212 in the X direction by rotating a gear 231 provided at the tip.

  The power receiving side unit 3 includes a secondary winding 31, support means 32 that slidably supports the secondary winding 31, and moving means that moves the secondary winding 31 on the support 32. As a motor 33, a secondary winding portion 31, a support means 32, a shield case 34 for housing the motor 33, and a control means (not shown) for controlling the motor 33 based on the detection result of the detection means. It is configured.

  The secondary side winding portion 31 includes an electric wire 311 wound around the X direction as an axial direction and a bobbin 312 in which a rack portion 312a is formed, as in the primary side winding portion 21. Further, the support means 32 includes a plate-like iron core 321 and a fixing portion 322 in substantially the same manner as the support means 22, and the secondary winding 31 and the iron core 321 function as a secondary coil unit. Further, the motor 33 is provided with a gear 331 at the tip, substantially like the motor 23.

  Next, the operation of the non-contact power feeding device 1 when the vehicle is parked in the parking space and the power feeding side unit 2 and the power receiving side unit 3 are displaced in the X direction will be described with reference to FIG. First, as shown by a two-dot chain line in FIG. 2, the primary side winding portion 21 is positioned at the substantially central portion in the X direction in the power feeding side unit 2, and the secondary side winding portion 31 is in the power receiving side unit 3. The motors 23 and 33 are respectively rotated so as to be positioned at the approximate center in the X direction. As a result, the positional deviation between the power feeding side unit 2 and the power receiving side unit 3 and the positional deviation between the winding portions 21 and 31 are substantially equal. Next, the detection means detects the positional deviation amount ΔX between the power supply side unit 2 and the power reception side unit 3 shown in FIG. 2, and the control means provided in the power supply side unit 2 and the power reception side unit 3 includes the bobbin 212, The motors 23 and 33 are rotated so that 312 approaches each other, and the primary side winding part 21 and the secondary side winding part 31 are moved by ΔX / 2 in the opposite direction of the X direction.

  As shown by a solid line in FIG. 2, when the primary side winding part 21 and the secondary side winding part 31 face each other (that is, substantially in the same position in the X direction), the magnetic flux generated in the primary side winding part 21 Becomes easy to interlink with the secondary side winding portion 31, thereby reducing the loss caused by the magnetic flux entering another structure during power feeding.

  In addition, when ΔX / 2 is larger than the movable range of the primary side winding part 21 and the secondary side winding part 31, the primary side winding part 21 and the secondary side winding part 31 are maximized within the movable range. Move them closer together.

  According to this embodiment, there are the following effects. That is, the primary side winding part 21 and the secondary side winding part 31 are moved relative to each other in accordance with the positional deviation between the primary side winding part 21 and the secondary side winding part 31, thereby reducing the feeding efficiency. It is possible to prevent this, and it is not necessary to form protrusions on the iron cores 221, 321 and the configuration can be simplified. Further, even when the power feeding side unit 2 and the power receiving side unit 3 are displaced by a larger amount than the sum of the movable ranges of the primary side winding part 21 and the secondary side winding part 31, the winding parts 21, 31 are used. The effect of moving each other relative to each other can be obtained. By forming the power supply side unit 2 and the power reception side unit 3 so that the winding portions 21 and 31 have an appropriate movable range, the entire apparatus can be downsized. be able to. Further, the winding portions 21 and 31 are moved relative to each other in response to the deviation in the X direction between the power supply side unit 2 and the power reception side unit 3, so that the deviation in the front-rear direction (Y direction) with respect to the parking position of the vehicle is reduced. Even if it is prevented by stopping, etc., even if a deviation occurs in the width direction (X direction), it is possible to minimize a decrease in power supply efficiency.

  Furthermore, if the primary side winding part 21 and the secondary side winding part 31 are slidably provided, if the positional deviation is less than the sum of the movable ranges of the winding parts 21, 31, the winding part 21, 31 can be made to face each other, and one unit can be prevented from increasing in size as compared with a configuration in which either one is slidable.

  Further, the support means 22 and 32 respectively support the primary winding part 21 and the secondary winding part 31 so as to be slidable along the iron cores 221 and 321, thereby preventing the configuration from becoming complicated. However, the inductance of the primary side coil unit and the secondary side coil unit can be increased.

  Further, since the primary side winding part 21 and the secondary side winding part 31 are provided so as to be slidable in the X direction which is the axial direction, the winding parts 21 and 31 can be easily moved along the iron cores 221 and 321. Can be slid.

  In addition, this invention is not limited to the said embodiment, Including other structures etc. which can achieve the objective of this invention, the deformation | transformation etc. which are shown below are also contained in this invention. For example, in the above-described embodiment, the primary side winding part 21 and the secondary side winding part 31 are provided to be slidable in the X direction. However, the primary side winding part 21 and the secondary side winding part 31 are provided. One of them may be slidable. Further, the winding portion only needs to be slidable in at least one direction on the XY plane. For example, the winding portion is formed such that the Y-direction dimension inside the winding portion is larger than the Y-direction dimension of the iron core. The part may be configured to be movable in the Y direction, or the primary side winding part and the secondary side winding part may be provided to be slidable in different directions.

  Moreover, in the said embodiment, although the support means 22 and 32 shall be equipped with the iron cores 221 and 321, the iron cores 221 and 321 may be abbreviate | omitted, for example, the plate-shaped member of substantially the same shape as the iron cores 221 and 321 The bobbin 212, 312 may be configured to slide on the top, or a rail part may be formed inside the shield case so that a part of the bobbin is slidably supported by the rail part. .

  Moreover, in the said embodiment, although the primary side coil | winding part 21 and the secondary side coil | winding part 31 shall be formed facing the axial direction to the X direction, as shown in FIG. As a result, the primary winding part 21B and the secondary winding part 31B may be formed by winding the electric wires 211B and 311B. Thus, in the configuration in which the opposing direction of the winding portion and the axial direction coincide with each other, the power feeding efficiency is likely to be reduced due to the positional deviation along the XY plane intersecting these directions. The relative movement can effectively prevent a decrease in power supply efficiency. In such a configuration, the winding portions 21 and 31 are preferably provided so as to be relatively movable not only in the X direction but also in the Y direction. The plate-like members 221B and 321B that support the winding portions 21B and 31B may be iron cores or may be formed of members having low magnetic permeability.

  In the above embodiment, the motors 23 and 33 are exemplified as the moving means. However, the moving means may be any means that moves the winding portions 21 and 31 in the XY plane. The linear motor may be provided so that the shaft can protrude and retract in the sliding direction.

  Moreover, in the said embodiment, although the primary side coil | winding part 21 and the secondary side coil | winding part 31 shall be provided with the bobbins 212 and 312, the bobbin may be abbreviate | omitted and the electric wire wound helically May be directly supported by the supporting means and moved by the moving means.

  In the embodiment, the power supply side unit 2 and the power reception side unit 3 are provided with the X direction facing the vehicle width direction. However, the power supply side unit 2 and the power reception side unit 3 are arranged in the axial direction of the winding portion. (Y direction) may be provided so as to face the vehicle width direction.

  Moreover, in the said embodiment, although the non-contact electric power feeder 1 shall be for supplying electric power to the battery provided in the vehicle, what is necessary is just an apparatus which carries out non-contact electric supply from a power supply to arbitrary electric equipment.

  In addition, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but may be configured for the above-described embodiments without departing from the scope and spirit of the invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations. Therefore, the description limiting the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

DESCRIPTION OF SYMBOLS 1 Non-contact electric power feeder 2 Power feeding side unit 3 Power receiving side unit 21 Primary side winding part 22 Support means 23 Motor (moving means)
31 Secondary winding part 32 Support means 33 Motor (moving means)
221 Iron core 321 Iron core

Claims (4)

A non-contact power supply device that supplies power from a power supply side unit to a power reception side unit,
The power supply side unit is configured to include a primary side coil unit including a primary side winding portion,
The power receiving unit is configured to include a secondary coil unit including a secondary winding portion,
At least one of the power supply side unit and the power receiving side unit is the primary side winding part or the secondary side in a direction intersecting with the opposing direction of the primary side winding part and the secondary side winding part. A support means for slidably supporting the winding part, and a moving means for moving the primary side winding part or the secondary side winding part on the support means,
The non-contact power feeding apparatus according to claim 1, wherein the moving means relatively moves the primary side winding part and the secondary side winding part in accordance with a positional shift in the intersecting direction.   The non-contact power feeding device according to claim 1, wherein each of the power feeding side unit and the power receiving side unit includes the supporting unit and the moving unit. The primary side coil unit and the secondary side coil unit each include an iron core, and the primary side winding portion and the secondary side winding portion are formed around the iron core with the intersecting direction as an axial direction. And
The non-contact power feeding apparatus according to claim 1, wherein the support unit supports the primary side winding part or the secondary side winding part so as to be slidable along the iron core.   The contactless power feeding device according to claim 1, wherein the primary side winding portion and the secondary side winding portion are formed with the facing direction as an axial direction.

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