JPWO2015019478A1 - Non-contact power feeding device - Google Patents

Abstract

An object of the present invention is to provide a non-contact power feeding device capable of reducing the weight of a power feeding transformer while stabilizing magnetic characteristics during rotation. In order to solve the above problems, the present invention includes a first circuit connected to a power supply, a power supply transformer, and a second circuit for supplying power to a load, and the power of the power supply is supplied to the first power supply. In the non-contact power feeding device that transmits power from a circuit to the second circuit in a non-contact manner via the power feeding transformer, the power feeding transformer includes a winding wound in an annular shape, an inner circumference and an outer circumference of the winding. And a pair of power supply coils each formed of at least one of an inner peripheral core and an outer peripheral core formed so as to extend along a predetermined gap.

Description

  The present invention relates to a non-contact power supply apparatus that transmits electric power in a non-contact manner to a device powered by electric energy such as an X-ray CT apparatus or a wind power generator using a power supply transformer.

  For example, an X-ray CT apparatus and a wind power generator include a gantry fixing part and a rotating part that is rotatably supported with respect to the gantry fixing part. In order to drive the apparatus mounted on the rotating part, the gantry fixing part It is necessary to supply power to the rotating unit from the power supply device arranged in the above. In many X-ray CT apparatuses and wind power generators, slip rings are used as power transmission means between the gantry fixing part and the rotating part. The slip ring includes a metal ring and a metal brush brought into contact with the metal ring. For example, the slip ring has a structure in which a metal ring is provided on the gantry fixing portion and a metal brush is provided on the rotating portion. With such a structure, it is possible to transmit power between the gantry fixing unit and the rotating unit while rotating the rotating unit. However, in the slip ring, the rotating part is rotated while the metal ring and the metal brush are in contact with each other. Therefore, wear powder is generated due to wear of the metal ring and the metal brush, and maintenance work such as removal of the wear powder is necessary. Moreover, since heat is generated when the metal ring and the metal brush are worn, it is not suitable for high-speed rotational movement.

  [Patent Document 1] is disclosed as a non-contact power feeding apparatus that solves this problem. In the non-contact power feeding device described in [Patent Document 1], the primary coil mounted on the gantry fixing unit and the secondary coil mounted on the rotating unit are arranged to face each other, and the secondary coil is moved from the primary coil by using electromagnetic induction. Transmits electric power to the coil without contact. The primary coil and the secondary coil have a configuration in which an integrally formed U-shaped magnetic body core is annularly arranged along a winding wound in an annular shape. Furthermore, the magnetic characteristic of the power feeding coil during rotation is stabilized by using different numbers of magnetic cores arranged in the primary coil and the secondary coil.

  However, in order to improve the magnetic coupling between the power feeding coils, it is necessary to arrange a large number of magnetic cores without any gaps, and there is a problem that it is difficult to reduce the weight of the power feeding transformer.

  As a non-contact power feeding apparatus that solves this problem, [Patent Document 2] or [Patent Document 3] is disclosed. In the non-contact power feeding device described in [Patent Document 2], the shape of the magnetic core is a U-shape having an open surface in which one side of a rectangle is cut out, and the protruding end of the magnetic core is aligned along the rotational movement direction. By adopting a shape having a long and opposed surface, the magnetic characteristics are stabilized and the feed transformer is reduced in weight. Further, in the non-contact power feeding device described in [Patent Document 3], the primary coil has a configuration in which an annular winding and a U-shaped core are annularly arranged, and the secondary coil is the primary coil. A plurality of magnetic cores are arranged along the circumferential direction of each of the coils, windings are wound around each of the plurality of magnetic cores, and the respective windings are connected in series. The coil is lightened.

JP 2000-150276 A JP 2001-269330 A JP 2009-131618 A

  However, the technique described in [Patent Document 2] has a problem that the shape of the magnetic core is complicated. Furthermore, since the winding is wound around the center of the U-shaped core, there is a problem that it is difficult to improve the magnetic coupling between the feeding coils.

  Moreover, in the technique described in [Patent Document 3], since it is necessary to divide the secondary coil into a plurality of parts, there is a problem that the structure of the feed transformer is complicated. Furthermore, since the primary coil is configured by arranging a large number of U-shaped cores without any gaps, it is difficult to reduce the weight of the primary coil.

In order to solve the above problems, the present invention includes a first circuit connected to a power supply, a power supply transformer, and a second circuit for supplying power to a load, and the power of the power supply is supplied to the first power supply. In the non-contact power feeding device that transmits power from a circuit to the second circuit in a non-contact manner via the power feeding transformer, the power feeding transformer includes a winding wound in an annular shape, an inner circumference and an outer circumference of the winding. A pair of power supply coils each including at least one of an inner peripheral core and an outer peripheral core formed so as to extend along a predetermined gap is disposed opposite to each other with a predetermined gap interposed therebetween.

According to the present invention, since the core shape of the power transformer can be simplified, it is possible to provide a non-contact power feeder that can reduce the weight of the power transformer while stabilizing the magnetic characteristics during rotation.

1 is a schematic configuration diagram illustrating a configuration of a non-contact power feeding device according to Embodiment 1. FIG. 1 is a configuration diagram of a power supply transformer according to Embodiment 1. FIG. 1 is a configuration diagram of a power supply transformer according to Embodiment 1. FIG. FIG. 6 is a configuration diagram of a power supply transformer according to a second embodiment. FIG. 6 is a configuration diagram of a power supply transformer according to a third embodiment. FIG. 6 is a configuration diagram of a power supply transformer according to a fourth embodiment. FIG. 10 is a configuration diagram of a power supply transformer according to a fifth embodiment. FIG. 10 is a configuration diagram of a power supply transformer according to a fifth embodiment. FIG. 10 is a configuration diagram of a power supply transformer according to a sixth embodiment. FIG. 10 is a schematic configuration diagram illustrating a configuration of an X-ray CT apparatus 602 according to a seventh embodiment. FIG. 10 is a configuration diagram of a power supply transformer according to a seventh embodiment. FIG. 10 is a configuration diagram of a power supply transformer according to a seventh embodiment. FIG. 10 is a configuration diagram of a power supply transformer according to an eighth embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic configuration diagram of a non-contact power feeding device 2 according to a first embodiment of the present invention. The non-contact power feeding device 2 includes a gantry fixing unit 4 and a rotating unit 5, and transmits electric power from the gantry fixing unit 4 to the rotating unit 5 in a non-contact manner by magnetic coupling in a power supply transformer Tr.

  The gantry fixing unit 4 includes a power supply circuit 101 that receives power from the AC power supply 1 and supplies high-frequency power to the primary coil T1, and a primary coil T1. The power supply circuit 101 includes an AC / DC converter 6 that outputs a DC link voltage, a high-frequency inverter 7 that supplies high-frequency power to the primary coil T1 by outputting an AC voltage of an arbitrary frequency with the DC link voltage as an input, Control means 9 and communication means 11 are provided.

  The AC / DC converter 6 and the high frequency inverter 7 are controlled by the control means 9 and control the frequencies of the DC link voltage and the AC voltage to arbitrary values.

  On the other hand, the rotating unit 5 is configured to magnetically couple with the primary coil T1 to form a power supply transformer Tr, and receives power from the primary coil T1 in a non-contact manner and receives power from the secondary coil T2. 3 and a load 3. The power receiving circuit 102 includes a rectifier circuit 8, a control unit 10, and a communication unit 12. The control means 9 and the control means 10 are wirelessly connected by the communication means 11 and the communication means 12. The control means 10 detects the output voltage and output current of the rectifier circuit 8.

  Next, the configuration of the feed transformer Tr will be described with reference to FIGS. 2 and 3. 2 and 3 are configuration diagrams showing a first embodiment of a power supply transformer Tr of the present invention. FIG. 2 is an exploded configuration diagram of the feed transformer Tr. 3A is a view of the power supply transformer Tr as viewed from the direction of the rotation axis, and FIG. 3B is a view of the A-B cross section of FIG. 3A as viewed from the direction of the arrow.

  The power supply transformer Tr includes an axial gap structure in which a primary coil T1 and a secondary coil T2 are arranged to face each other with a gap in the rotation axis direction.

  The primary coil T1 includes a primary winding N1 wound in an annular shape, an inner peripheral core 13 and an outer peripheral core 14 formed along the inner periphery and the outer periphery of the primary winding N1, and the inner peripheral core 13 and the outer core. 14 includes a bottom core 15 that magnetically couples 14 and a support member 16. The support member 16 supports the inner peripheral core 13, the outer peripheral core 14, and the bottom core 15 to the gantry fixing portion 4.

  The secondary coil T2 includes a secondary winding N2 wound in an annular shape, an inner peripheral core 17 and an outer peripheral core 18 formed along the inner periphery and the outer periphery of the secondary winding N2, and the inner peripheral core 17. And a bottom core 19 that magnetically couples the outer peripheral core 18 and a support member 20. The support member 20 supports the inner peripheral core 17, the outer peripheral core 18, and the bottom core 19 to the rotating unit 5.

  Thus, the core shape can be simplified by dividing the magnetic core of the primary coil T1 or the secondary coil T2 into the inner peripheral core, the outer peripheral core, and the bottom core. Thereby, since the strength of the core can be ensured, it is easy to reduce the thickness of the core and reduce the weight of the feed transformer as compared with the case of using an integrally molded core. Furthermore, by arranging the inner core and / or outer core facing each other, it is possible to improve the magnetic coupling between the feeding coils and to stabilize the magnetic characteristics during rotation.

  As materials used for the inner peripheral cores 13 and 17, the outer cores 14 and 18, and the bottom cores 15 and 19, ferrite, a silicon steel plate, permalloy, other ferromagnetic materials, paramagnetic materials, and the like are used.

  Although not shown, a fixing member for fixing the primary winding N1 and the secondary winding N2 to the support members 16 and 19 may be provided. An enameled wire (single wire) is used for the primary winding N1 and the secondary winding N2, but a litz wire may be used.

  According to the present embodiment, it is possible to simplify the shape of the core constituting the power supply transformer. Thereby, weight reduction of a feed transformer is realizable, stabilizing a magnetic characteristic.

  Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a cross-sectional view of the feed transformer Tr according to the second embodiment of the present invention.

  The difference from the first embodiment is that the bottom cores 115 and 119 are arranged up to both ends of the support members 116 and 120, the primary winding N1 or the secondary winding N2, and the inner peripheral core 113. , 117 and / or the outer cores 114 and 118 and / or the bottom cores 15 and 19, insulators 121 and 122 are inserted.

  According to the present embodiment, the insulation between the primary winding N1 or secondary winding N2 and the core is ensured by inserting an insulator between the primary winding N1 or secondary winding N2 and the core. Can do. Furthermore, by using a resin mold as the insulator, the insulator can be used as a support material for supporting the winding on the core.

  Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 5 is an exploded configuration diagram of the feed transformer Tr according to the third embodiment of the present invention.

  The difference from the first embodiment is that the primary winding N1 and / or the inner core 213 and / or the outer core 214 of the primary coil T1, and the secondary winding N1 and / or the inner core 217 of the secondary coil T2. And / or the outer peripheral core 218 has a different diameter, and the inner peripheral core 217 and the outer peripheral core 218 are covered with the inner peripheral core 213 and the outer peripheral core 214.

  According to this embodiment, since the opposing area of the primary coil T1 and the secondary coil T2 can be increased, the magnetic coupling between the power feeding coils can be improved.

  Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 6 is an exploded configuration diagram of the feeding transformer Tr according to the fourth embodiment of the present invention.

  The difference from the first embodiment is that the bottom cores 315 and 319 of the primary coil T1 and the secondary coil T2 are divided in the radial direction of the primary winding N1 and the secondary winding N2. In this embodiment, the bottom cores 315 and 319 of the primary coil T1 and the secondary coil T2 are divided into the same number, but the bottom core 315 of only one of the primary coil T1 and the secondary coil T2 is divided. 319 may be divided. Further, the bottom core may be divided into different numbers by the primary coil T1 and the secondary coil T2. In the present embodiment, the bottom cores 315 and 319 are divided in the circumferential direction of the winding, but may be divided in the radial direction of the winding. By adding the bottom core to the circumferential direction of the winding and also dividing it in the radial direction, the core members that make up the feed transformer Tr can be further miniaturized, so that the core strength can be improved and the core can be manufactured. This makes it easier to reduce the manufacturing cost of the feed transformer.

  According to this embodiment, since the bottom core can be reduced in size, it is easier to manufacture the core than in the first embodiment. Thereby, the manufacturing cost of a feed transformer can be reduced.

  Next, a fifth embodiment of the present invention will be described with reference to FIGS. FIG. 7 is an exploded configuration diagram of the feed transformer Tr according to the fifth embodiment of the present invention. FIG. 8A is a diagram showing the positional relationship between the inner peripheral core 413, the outer peripheral core 414, and the bottom core 415 of the primary coil T1 of the fifth embodiment of the present invention, and FIG. It is the figure which showed the positional relationship of the inner peripheral core 417, the outer peripheral core 418, and the bottom face core 419 of the secondary coil T2 of Example 5 of invention. The difference from the first embodiment and the second embodiment is that the inner cores 413 and 417 and the outer cores 414 and 418 are divided into a plurality of parts.

  In the present embodiment, the inner cores 413 and 417 and the outer cores 414 and 418 have the same number of divisions, but the inner and outer cores may have different numbers of core divisions.

  In the present embodiment, the bottom cores 415 and 419 are arranged in the gap between the divided inner peripheral cores 413 and 417 and outer peripheral cores 414 and 418. It is good also as a structure arrange | positioned in the center part of 414,417 and the outer periphery cores 414,418.

  According to this embodiment, since the core shape can be reduced in size and simplified, the core can be easily manufactured. By reducing the size of the core, the members can be shared by the inner peripheral core and the outer peripheral core, so that the cost of the power supply transformer can be reduced.

  Next, a sixth embodiment of the present invention will be described with reference to FIG. FIG. 9A is a diagram showing the positional relationship of the inner peripheral core 513, the outer peripheral core 514, and the bottom core 515 of the primary coil T1 of Example 6 of the present invention, and FIG. It is the figure which showed the positional relationship of the inner peripheral core 517 of the secondary coil T2 of Example 6, the outer peripheral core 518, and the bottom face core 519.

  The difference from the third embodiment is that the inner and outer cores 513 and 517 and the outer and outer cores 514 and 518 are divided into different numbers by the primary coil T1 and the secondary coil T2.

  In the present embodiment, the number of divisions of the core of the primary coil T1 is set to 7 (N), and the number of divisions of the core of the secondary coil T2 is set to 6 (N-1). For example, the core division number of the primary coil T1 may be N-1, and the core division number of the secondary coil T2 may be N. Further, the inner cores 513 and 517 and the outer cores 514 and 518 may be divided into different numbers.

  Further, although the number of bottom cores 515 and 519 is different between the primary coil T1 and the secondary coil T2, the number of bottom cores may be the same between the primary coil T1 and the secondary coil T2.

  According to the present embodiment, the relative positions of the inner and outer cores of the primary coil T1 and the secondary coil T2 do not completely overlap with each other. Therefore, the magnetic characteristics during rotation can be improved as compared with the third embodiment. Can be stabilized.

  Next, a seventh embodiment of the present invention will be described with reference to FIGS. In the non-contact power feeding device 2 described in the first embodiment, a single power transformer is disposed. However, depending on the device, a plurality of power transformers may be required. Here, an X-ray CT apparatus will be described as an example. FIG. 10 is a diagram showing a schematic configuration of an X-ray CT apparatus 602 employing the non-contact power feeding apparatus 2 of the present invention.

  The X-ray CT apparatus 602 of this embodiment is divided into a gantry fixing unit 604 and a rotating unit 605. The rotating part 605 is supported rotatably with respect to the gantry fixing part 604.

  The gantry fixing unit 604 receives the AC power supply 1 as an input, generates an AC / DC converter 606 that generates a DC link voltage, and receives a DC link voltage as an input, generates an AC voltage of an arbitrary frequency, and generates primary coils T11 and T12. High-frequency inverters 607 and 621 for supplying high-frequency power to the power source, primary coils T11 and T12, a control unit 609, an image display unit 630, an image processing unit 631, and communication units 611 and 632.

  The rotating unit 605 constitutes power feeding transformers Tr11 and Tr21 by being magnetically coupled to the primary coils T11 and T12, and receives secondary power from the primary coils T11 and T12 in a non-contact manner, and secondary coils T21 and T22. The rectifier circuit 608 rectifies the power of the coil T21 and supplies a high DC voltage to the X-ray tube 627 serving as the load 603, the rectifier circuit 622 that rectifies the power of the secondary coil T22, and the X-ray tube 627. An inverter 623 that supplies electric power to a stator coil 624 for rotating the rotary anode, an inverter 625 that transmits electric power to a heating transformer 626 for heating a cathode included in the X-ray tube 627, and an X-ray detector 628, a control unit 610, and communication units 612 and 633. The control means 610 detects the output control of the inverters 623 and 625 and the output voltage and output current of the rectifier circuit 608. The control unit 609 and the control unit 610 are wirelessly connected by the communication unit 611 and the control unit 612. The X-ray detection unit 628 and the image processing unit 631 are wirelessly connected by the communication unit 632 and the communication unit 633.

  The difference from the first embodiment described above is that a power supply transformer Tr21 of a system different from the power supply transformer Tr is provided in order to transmit power to the stator coil 624 and the heating transformer 626. The X-ray tube 627 emits X-rays toward the subject 629 by being supplied with the DC voltage output from the rectifier circuit 608. X-rays that have passed through the subject 629 enter the X-ray detection unit 628. The X-ray detection unit 628 detects X-rays transmitted through the subject 629 and amplifies the detected signal, and is disposed to face the X-ray tube 627. By irradiating and detecting X-rays while the X-ray tube and the X-ray detection unit provided in the rotating unit rotate, transmission X-ray dose distributions at various angles can be measured.

  The communication units 632 and 633 transmit the detection signal of the X-ray detection unit 628 from the rotation unit 605 to the gantry fixing unit 604. The detection signal received by the communication unit 632 is transmitted to the image processing device 631. The image processing device 631 generates a tomographic image of the subject 629 by processing the transmitted detection signal. The image display device 630 displays a tomographic image generated by the image processing device 631.

  Next, a detailed configuration of the power supply transformers Tr11 and Tr21 will be described below with reference to FIGS. FIG. 11 is an exploded configuration diagram of the power supply transformers Tr11 and Tr21, and FIG. 12 is a cross-sectional view of the power supply transformers Tr11 and Tr21.

  The primary coil T11 includes a primary winding N11 wound in an annular shape, an inner peripheral core 613a and an outer peripheral core 614a formed along the inner periphery and the outer periphery of the primary winding N11, and the inner periphery core 613a and the outer periphery core. A bottom core 615b that magnetically couples 614a.

  The primary coil T12 is formed so as to be along the inner periphery and the outer periphery of the primary winding N12, and the primary winding N12 wound in an annular shape along the inner periphery of the primary winding N11 via the gap 634. An inner circumferential core 613b and an outer circumferential core 614b, and a bottom core 615b that magnetically couples the inner circumferential core 613b and the outer circumferential core 614b are provided. The inner cores 613a and 613b, the outer cores 614a and 614b, and the bottom cores 615a and 615b are fixed to the gantry fixing portion 604 by the support member 616.

  On the other hand, the secondary coil T21 includes an annularly wound secondary winding N21, an inner peripheral core 617a and an outer peripheral core 618a formed along the inner periphery and the outer periphery of the secondary winding N21, A core 617a and a bottom core 619b that magnetically couples the outer core 618a are provided.

  The secondary coil T22 has a secondary winding N22 wound in an annular shape along the inner periphery of the secondary winding N21 via the gap 635, and extends along the inner periphery and the outer periphery of the secondary winding N22. And an inner core 617b and an outer core 618b, and a bottom core 619b that magnetically couples the inner core 617b and the outer core 618b. The inner peripheral cores 617a and 617b, the outer peripheral cores 618a and 618b, and the bottom cores 619a and 619b are fixed to the rotating portion 605 by a support member 620.

  A common core may be used for the inner peripheral core 613a of the primary coil T11 and the outer peripheral core 614b of the primary coil T12. Similarly for the secondary coils 21 and T22, a common core may be used for the inner peripheral core 617a and the outer peripheral core 618b. In the present embodiment, the cores divided into the bottom core 615a of the primary coil 11 and the bottom core 615b of the primary coil T12 are used, but a common core may be used. Similarly, for the secondary coils T21 and T22, a common core may be used for the bottom core 619a and the bottom core 619b. Thus, by sharing the core, the number of parts constituting the power supply transformer can be reduced, so that the number of assembling steps of the power supply transformer Tr11 and the power supply transformer Tr12 can be reduced.

  According to the present embodiment, the shape of the core constituting the feed transformer can be simplified as in the first embodiment described above. Thereby, it is possible to reduce the weight of the power supply transformer while stabilizing the magnetic characteristics.

  Next, an eighth embodiment of the present invention will be described with reference to FIG. FIG. 13 is a cross-sectional view of power supply transformers Tr12 and Tr22 according to an eighth embodiment of the present invention.

  The difference from the seventh embodiment is that the primary transformer T13 is shared by the feed transformer Tr12 and the feed transformer Tr22, the bottom core 719 is shared by the secondary coil T23 and the secondary coil T24, and the secondary coil T23 is A secondary winding N23 and an inner peripheral core 717 are provided, and the secondary coil T24 is configured to include a secondary winding N24 and an outer peripheral core 718. The primary coil T13 includes a primary winding N13, an inner peripheral core 713, an outer peripheral core 714, a bottom core 715, and a support member 716.

According to this embodiment, by sharing the primary coil T13 with a plurality of power supply transformers, it is possible to reduce the weight of the power supply transformer disposed on the gantry fixing portion. Moreover, the number of parts of the power supply transformer can be reduced, and the cost of the non-contact power supply device can be reduced.

As mentioned above, although embodiment of this invention was described, this invention is not limited to these. For example, in the seventh embodiment, the contactless power supply device including two power supply transformers has been described. However, the present invention can also be applied to a contactless power supply device including three or more power supply transformers. It is. In all the embodiments, the case where power is transmitted from the fixed unit to the rotating unit has been described. It is possible to apply the invention.

Industrial applicability

The non-contact power supply device of the present invention can be applied to a power supply device used for an X-ray CT apparatus, a power supply device for a wind power generator, a power supply device used for a monitoring camera, and the like.

DESCRIPTION OF SYMBOLS 1 ... AC power source, 2 ... Non-contact electric power feeder, 3,603 ... Load, 4,604 ... Mount fixing | fixed part, 5,605 ... Rotation part, 6,606 ... AC DC converter, 7,607 ... high frequency inverter, 8, 608, 622 ... rectifier circuit, 9, 10, 609, 610 ... control means, 11, 12, 611, 612, 632, 633 ...・ Communication means, 602... X-ray CT apparatus, 623, 625... Inverter, 624... Stator coil, 625... Heating transformer, 627. Detection unit, 629 ... subject, 630 ... image display device, 631 ... image processing device, 13, 113, 213, 313, 413, 513, 613a, 613b, 17, 117, 217, 317, 417, 517, 617 , 617b, 713, 717 ... inner core, 14, 114, 214, 314, 414, 514, 614a, 614b, 18, 118, 218, 318, 418, 518, 618a, 618b, 714, 718,. Outer core, 15, 115, 215, 315, 415, 515, 615a, 615b, 19, 119, 219, 319, 419, 519, 619a, 619b, 715, 719 ... bottom core, 16, 116, 216 , 316, 416, 516, 616a, 616b, 20, 120, 220, 320, 420, 520, 620a, 620b, 716, 720 ... supporting member, 101 ... power feeding circuit, 102 ... power receiving circuit, 121, 122 ... insulator, 634, 635 ... gap, Tr, Tr11, Tr12, Tr21, r22 ... feed transformer, T1, T11, T12, T13 ... primary coil, T2, T21, T22, T23, T24 ... secondary coil, N1, N11, N12, N13 ... primary winding, N2, N21, N22, N23, N24 ... Secondary winding

Claims (16)

A first circuit connected to a power supply; a power supply transformer; and a second circuit for supplying power to a load. The power of the power supply is transferred from the first circuit to the second circuit. In a non-contact power feeding device that transmits power in a non-contact manner,
The power supply transformer includes a pair of power supply coils including a winding wound in an annular shape, and at least one of an inner peripheral core and an outer peripheral core formed respectively along an inner periphery and an outer periphery of the winding. A non-contact power feeding apparatus having a configuration in which a predetermined gap is interposed therebetween.   The contactless power supply device according to claim 1, comprising both the inner peripheral core and the outer peripheral core.   3. The non-contact power feeding apparatus according to claim 2, further comprising a bottom core that magnetically couples the inner and outer peripheral cores on a side opposite to the facing surface of the winding. .   The non-contact power feeding device according to claim 1, wherein the non-contact power feeding device includes a gantry fixing portion and a rotating portion that is rotatably supported with respect to the gantry fixing portion. The fixing unit includes the first circuit and one of the feeding coils, and the rotating unit includes the other of the feeding coil, the second circuit, and the load. Non-contact power feeding device.   5. The non-contact power feeding device according to claim 1, wherein one of the windings of the feeding coil and / or the inner circumferential core and / or the inner circumferential core and the other winding of the feeding coil. And / or the inner peripheral core and / or the outer peripheral core have substantially the same diameter, respectively.   In the non-contact electric power feeder in any one of Claims 1-4, the said winding and / or the inner periphery core and / or the said outer periphery core with which one of the said power supply coils was provided, and the said other with which the said power supply coil was provided A non-contact power feeding device, wherein the winding and / or the inner peripheral core and / or the outer peripheral core have different diameters.   The contactless power supply device according to claim 3, wherein the bottom core is divided in a circumferential direction of the winding.   The contactless power feeding device according to claim 1, wherein the inner peripheral core and / or the outer peripheral core is divided in a circumferential direction of the winding.   9. The non-contact power feeding device according to claim 8, wherein the bottom core is disposed in a gap between the inner peripheral core and / or the outer peripheral core that are separately disposed.   The contactless power supply device according to claim 8 or 9, wherein the inner peripheral core and / or the outer peripheral core provided in one of the power supply coils, and the inner peripheral core provided in the other of the power supply coil and / or The non-contact electric power feeder characterized by dividing the said outer periphery core into a different number.   The contactless power supply device according to claim 10, wherein a division number of the inner peripheral core and / or the outer peripheral core provided in one of the power supply coils is N, and the inner peripheral core provided in the other of the power supply coil and / or A non-contact power feeding device, wherein the number of divisions of the outer peripheral core is N-1.   The non-contact power feeding device according to claim 3, further comprising a support member that supports the winding, the inner peripheral core, the outer peripheral core, and the bottom core. Contact power supply device.   The non-contact power feeding device according to claim 3, wherein an insulator is inserted between the winding and the inner and / or outer and / or bottom cores. A non-contact power feeding device.   The contactless power feeding device according to claim 1, comprising a plurality of the power feeding transformers.   The contactless power supply device according to claim 14, wherein one of the power supply coils is shared by the plurality of power supply transformers.   An X-ray CT apparatus equipped with one non-contact power feeding device according to claim 1.

Images