JP5897777B1 - Non-contact power feeding system, power receiving device, and power transmitting device - Google Patents

Abstract

In the magnetic resonance type non-contact power feeding system 1, power is stably supplied from the power transmitting device 10 to the power receiving device 20 while maintaining the target transmission efficiency. The power receiving device 20 is provided in the internal space of the power receiving coil 211, the adjustment coil 212 whose direction of the winding axis rotates with respect to the direction of the winding axis of the power receiving coil 211, and a transmission efficiency that is a target value during power feeding The angle adjusting mechanism 24 that adjusts the angle θ1 formed by the direction of the winding axis of the power receiving coil 211 and the direction of the winding axis of the adjustment coil 212 is provided. The power transmission device 10 is provided in the internal space of the power transmission coil 111, the adjustment coil 112 whose direction of the winding axis rotates with respect to the direction of the winding axis of the power transmission coil 111, and a transmission efficiency that is a target value during power feeding. The angle adjusting mechanism 14 that adjusts the angle θ2 formed by the direction of the winding axis of the power transmission coil 111 and the direction of the winding axis of the adjustment coil 112 is provided.

Description

  The present invention relates to a non-contact power feeding system, a power receiving device, and a power transmitting device.

  Patent Document 1 describes a power feeding system configured to cut off or transmit power supplied from a power transmitting device to a power receiving device, and the power transmitting device supplies power to the first coil of the power receiving device. Crossing the winding axis of the second coil so that the power is cut off or supplied, and the power transmission circuit having the second coil for power transmission, the third coil magnetically coupled between the second coil and the second coil It describes that it includes a rotation device that rotates the third coil around the rotation axis to change the impedance of the power transmission circuit.

Japanese Patent No. 05579953

  Transmission efficiency in a magnetic resonance type non-contact power supply system varies depending on the inductance and capacitance of the resonance circuit on the power transmission side or power reception side, the distance between the coil on the power transmission side and the coil on the power reception side, etc. To do. Therefore, in a system that performs magnetic resonance type non-contact power feeding, there is a need for a mechanism that stably supplies power from the power transmitting apparatus to the power receiving apparatus while maintaining transmission efficiency.

  The present invention has been made in view of such a background, and a non-contact power feeding system and a power receiving device capable of stably supplying power while maintaining a target transmission efficiency from the power transmitting device to the power receiving device. And it aims at providing a power transmission apparatus.

  One aspect of the present invention for achieving the above object is a power transmission device that has a power transmission side resonance circuit configured by using a power transmission coil and a capacitor and performs magnetic resonance type non-contact power feeding, a power reception coil, A non-contact power feeding system including a power receiving-side resonance circuit configured using a capacitor and receiving power from the power transmitting device by the non-contact power feeding, wherein the power receiving device The power receiving side adjustment coil provided in the inner space of the power receiving coil and supported in a manner such that the direction of the winding axis is rotatable with respect to the direction of the winding axis of the power receiving coil; An angle θ1 formed by the direction of the winding axis of the power receiving coil and the direction of the winding axis of the power receiving side adjustment coil so that transmission efficiency is maintained at a target value during power feeding from the power transmitting device to the power receiving device. Adjusting the power receiving side angle Includes a mechanism, a.

  According to the present invention, the direction of the winding axis of the power receiving coil and the coil for adjusting the power receiving side so that the power receiving device is maintained at the target value during power feeding from the power transmitting device to the power receiving device by non-contact power feeding. Since the angle θ1 formed by the direction of the winding axis is adjusted, it is possible to stably supply power while maintaining the target transmission efficiency from the power transmission device to the power reception device.

  One aspect of the present invention for achieving the above object is a power transmission device that has a power transmission side resonance circuit configured by using a power transmission coil and a capacitor and performs magnetic resonance type non-contact power feeding, a power reception coil, A non-contact power feeding system including a power receiving side resonance circuit configured using a capacitor and receiving power from the power transmitting device by the non-contact power feeding, wherein the power transmitting device The power transmission side adjustment coil provided in the internal space of the power transmission coil, and the direction of the winding axis is rotatably supported with respect to the direction of the winding axis of the power transmission coil, and the contactless power supply An angle θ2 formed by the direction of the winding axis of the power transmission coil and the direction of the winding axis of the power transmission side adjustment coil so that the transmission efficiency is maintained at a target value during power feeding from the power transmission device to the power reception device. Adjusting the power transmission side angle Includes a mechanism, a.

  According to the present invention, the direction of the winding axis of the power transmission coil and the power transmission side adjustment coil are set so that the transmission efficiency is maintained at the target value during power feeding from the power transmission device to the power receiving device by non-contact power feeding. Since the angle θ2 formed by the direction of the winding axis is adjusted, it is possible to stably supply power while maintaining the target transmission efficiency from the power transmission device to the power reception device.

  One aspect of the present invention for achieving the above object is the contactless power supply system, wherein the power transmission device is provided in an internal space of the power transmission coil, and a direction of a winding axis thereof is the winding of the power transmission coil. The power transmission side adjustment coil pivotally supported with respect to the direction of the rotation axis, and so that the transmission efficiency is maintained at the target value during power feeding from the power transmission device to the power reception device by the non-contact power feeding, A power transmission side angle adjustment mechanism that adjusts an angle θ2 formed by the direction of the winding axis of the power transmission coil and the direction of the winding axis of the power transmission side adjustment coil.

  According to the present invention, the direction of the winding axis of the power receiving coil and the coil for adjusting the power receiving side so that the power receiving device is maintained at the target value during power feeding from the power transmitting device to the power receiving device by non-contact power feeding. The winding angle of the power transmission coil is adjusted so that the transmission efficiency is maintained at the target value during power feeding from the power transmission device to the power reception device by non-contact power feeding. Since the angle θ2 formed by the direction of the rotation axis and the direction of the winding axis of the power transmission side adjustment coil is adjusted, the target transmission efficiency is maintained from the power transmission device to the power reception device, and power is supplied more stably. can do.

  One aspect of the present invention for achieving the above object is the non-contact power feeding system, wherein the power receiving device includes a power measuring circuit that measures the power received by the power receiving side resonance circuit, and the power receiving side angle. The adjustment mechanism controls an angle θ1 formed by the direction of the winding axis of the power receiving coil and the direction of the winding axis of the power receiving side adjustment coil so that the received power is maintained at a target value.

  According to the present invention, the power receiving device controls the angle θ1 formed by the direction of the winding axis of the power receiving coil and the direction of the winding axis of the power receiving side adjustment coil so that the received power is maintained at the target value. Therefore, it is possible to stably supply power while maintaining the target transmission efficiency from the power transmission apparatus to the power reception apparatus.

  One aspect of the present invention for achieving the above object is the non-contact power feeding system, wherein the power transmission device includes a power measurement circuit that measures transmission power of the resonance circuit on the power transmission side, and the power transmission side angle. The adjustment mechanism controls an angle θ2 formed by the direction of the winding axis of the power transmission coil and the direction of the winding axis of the power transmission side adjustment coil so that the transmitted power is maintained at a target value.

  According to the present invention, the power transmission device controls the angle θ2 formed by the direction of the winding axis of the power transmission coil and the direction of the winding axis of the power transmission side adjustment coil so that the transmitted power is maintained at the target value. Therefore, it is possible to stably supply power while maintaining the target transmission efficiency from the power transmission apparatus to the power reception apparatus.

  One aspect of the present invention for achieving the above object is the non-contact power feeding system, wherein the power receiving coil and the power receiving side adjusting coil are each formed by winding conductor wires in an annular shape with different diameters. One coil is configured to be accommodated in the internal space of another coil.

  By making the power receiving coil and the power receiving side adjustment coil have such a configuration, the power receiving device can be downsized.

  One aspect of the present invention for achieving the above object is the non-contact power feeding system, wherein the power transmission coil and the power transmission side adjustment coil are each formed by winding conductor wires in a ring shape with different diameters. One coil is configured to be accommodated in the internal space of another coil.

  By configuring the power transmission coil and the power transmission side adjustment coil as described above, the power transmission device can be reduced in size.

  In addition, the subject which this application discloses, and its solution method are clarified by the column of the form for inventing, and drawing.

  ADVANTAGE OF THE INVENTION According to this invention, electric power can be stably supplied maintaining the target transmission efficiency with respect to a receiving device from a power transmission apparatus.

It is a figure explaining the schematic structure of the non-contact electric power feeding system 1 of 1st Example. 1 is a diagram illustrating a configuration of a power transmission device 10. 2 is a diagram illustrating a configuration of a power receiving device 20. FIG. 3 is a diagram illustrating an arrangement example of a power transmission coil 111 of the power transmission device 10, and a power reception coil 211 and an adjustment coil 212 of the power reception device 20. FIG. It is a figure explaining the schematic structure of the non-contact electric power feeding system 1 of 2nd Example. 1 is a diagram illustrating a configuration of a power transmission device 10. 2 is a diagram illustrating a configuration of a power receiving device 20. FIG. 3 is a diagram illustrating an arrangement example of a power transmission coil 111 and an adjustment coil 112 of the power transmission device 10 and a power reception coil 211 of the power reception device 20. FIG. It is a figure explaining the schematic structure of the non-contact electric power feeding system 1 of 3rd Example. 1 is a diagram illustrating a configuration of a power transmission device 10. 2 is a diagram illustrating a configuration of a power receiving device 20. FIG. 3 is a diagram illustrating an arrangement example of a power transmission coil 111 and an adjustment coil 112 of the power transmission device 10, and a power reception coil 211 and an adjustment coil 212 of the power reception device 20. FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, duplicate description may be omitted by assigning the same reference numerals to common components. Moreover, the same code | symbol may be attached | subjected about a similar structure and those structures may be named generically.

= First embodiment =
FIG. 1 shows a schematic configuration of a magnetic resonance type non-contact power feeding system 1 shown as the first embodiment. As shown in the figure, the non-contact power feeding system 1 includes a power transmission device 10 and a power reception device 20. The power transmission device 10 transmits power toward the power reception device 20 by magnetic resonance type non-contact power feeding. The power receiving device 20 receives power transmitted from the power transmitting device 10.

  FIG. 2 shows a main configuration of the power transmission device 10 of the first embodiment. As illustrated in FIG. 1, the power transmission device 10 includes a power transmission circuit 11 and a power supply circuit 13.

  The power transmission circuit 11 includes a power transmission coil 111, a power transmission capacitor 113, and a control circuit 114. The power transmission coil 111 and the power transmission capacitor 113 constitute a resonance circuit. The power transmission coil 111 has a configuration in which a conductor wire such as an insulating coated copper wire is wound around the winding axis in a ring a predetermined number of times. The power transmission coil 111 is fixed to, for example, an insulating frame. The control circuit 114 includes a driver circuit (a gate driver, a half bridge driver, etc.), and generates a drive current having a predetermined frequency to be supplied to the resonance circuit based on the power supplied from the power supply circuit 13.

  The power supply circuit 13 is, for example, a switching or linear circuit, and supplies driving power to the power transmission circuit 11.

  FIG. 3 shows a main configuration of the power receiving device 20 of the first embodiment. As shown in the figure, the power reception device 20 includes a power reception circuit 21, a power measurement circuit 22, a load 23, and an angle adjustment mechanism 24.

 The power receiving circuit 21 includes a power receiving coil 211, an adjustment coil 212, a power receiving capacitor 213, and a rectifier circuit 214. The power receiving coil 211 and the power receiving capacitor 213 constitute a resonance circuit. The power receiving coil 211 has a configuration in which a conductor wire such as an insulation-coated copper wire is wound around the winding axis in a ring a predetermined number of times. The power receiving coil 211 is fixed to, for example, an insulating frame. The adjustment coil 212 is disposed in the internal space of the power receiving coil 211. The adjustment coil 212 is magnetically coupled to the power receiving coil 211. The rectifier circuit 214 converts AC power received by the resonance circuit into DC power and supplies the DC power to the load 23.

  The power measuring circuit 22 measures the received power of the power receiving circuit 21. The power measuring circuit 22 includes a voltmeter and an ammeter for measuring the power output from the power receiving circuit 21. The received power of the power receiving circuit 21 is an index representing the transmission efficiency of contactless power feeding.

  The angle adjusting mechanism 24 adjusts an angle θ1 formed by the direction of the winding axis of the power receiving coil 211 and the direction of the winding axis of the adjustment coil 212 according to the received power of the power receiving circuit 21 measured by the power measuring circuit 22. The transmission efficiency of contactless power feeding is adjusted. The angle adjustment mechanism 24 is configured using, for example, a microcomputer, an ASIC (Application Specific Integrated Circuit), a motor drive mechanism, a servo motor, a stepping motor, or the like.

  FIG. 4 illustrates an arrangement example of the power transmission coil 111 of the power transmission device 10 and the power reception coil 211 and the adjustment coil 212 of the power reception device 20. In this example, the power transmission coil 111 and the power reception coil 211 are arranged so that their respective winding axes coincide with the same straight line parallel to the x-axis of the three-dimensional orthogonal coordinate system set in FIG. . In the following description, it is assumed that the power transmission coil 111 and the power reception coil 211 are fixed so that the directions of the respective winding axes are maintained in this state.

  The outer diameter of the adjustment coil 212 is smaller than the inner diameter of the power reception coil 211, and the adjustment coil 212 is arranged in the internal space of the power reception coil 211 so that the center thereof coincides with the center of the power reception coil 211. By making the adjustment coil 212 and the power receiving coil 211 have such a configuration, the power receiving device 20 can be downsized.

  For example, the adjustment coil 212 is pivotally supported by a rotation axis that passes through the center thereof and is parallel to the z-axis. By rotating the adjustment coil 212 around the rotation axis, the direction of the winding axis of the adjustment coil 212 can be rotated in a plane parallel to the xy plane, whereby the winding axis of the power receiving coil 211 is rotated. The angle θ1 formed by the direction and the direction of the winding axis of the adjustment coil 212 can be changed.

従って、上記角度θ１を変化させることにより、共振回路の共振周波数（固有共振周波数）を変化させることができる。Here, it has been found that, in the resonance circuit of the power receiving circuit 21, the value of the inductance indicated by the power receiving coil 211 varies depending on the angle θ1. The resonance frequency (natural resonance frequency) f ₀ of the resonance circuit of the power transmission circuit 11 or the power reception circuit 21 constituting the non-contact power feeding system 1 is L for the inductance of the coil constituting the resonance circuit and the static frequency of the capacitor constituting the resonance circuit. If the capacitance is C, it can be expressed by the following formula 1.

Therefore, by changing the angle θ1, the resonance frequency (natural resonance frequency) of the resonance circuit can be changed.

On the other hand, the resonance frequency (f1 or f2) of the resonance circuit of the power transmission circuit 11 and the resonance circuit of the power reception circuit 21 is expressed by the following Expression 2 or Expression 3, for example, where k is the coupling coefficient of both.

  From Equation 1 to Equation 3, it can be seen that the resonance frequency (f1 or f2) varies depending on the inductance L of the coil constituting the resonance circuit and the capacitance C of the capacitor constituting the resonance circuit. Therefore, the resonance frequency (f1 or f2) can be changed by changing the inductance of the coil of the resonance circuit. Then, the transmission power from the power transmitting device 10 to the power receiving device 20 is changed by changing the resonance frequency (f1 or f2). Therefore, the transmission efficiency of contactless power feeding can be controlled by changing the angle θ1. .

  Therefore, even when the inductance L of the coil constituting the resonance circuit of the power transmission circuit 11 or the power reception circuit 21 or the capacitance C of the capacitor constituting the resonance circuit is changed, the angle θ1 is changed to change the contactless power feeding. The transmission efficiency can be controlled, and power can be stably supplied from the power transmission device 10 to the power reception device 20 while maintaining the target transmission efficiency. The coupling coefficient k varies depending on, for example, the distance between the power transmission coil 111 and the power reception coil 211, the arrangement state of both, the environment in which both are disposed, and the resonance frequency ( If the shift of f1 or f2) is corrected by adjusting the angle θ1, the transmission efficiency can be further stabilized.

  In controlling the angle θ1, for example, the transmission efficiency is monitored as needed, and the angle θ1 is feedback-controlled so that the transmission efficiency is maximized. For example, when the target transmission efficiency is determined in advance, the angle θ1 is feedback-controlled so that the target value is maintained. For example, when the transmission efficiency is limited in advance, the angle θ1 is feedback-controlled so as not to exceed the limit value.

  By the way, in the first embodiment, since the transmission efficiency is adjusted by changing the inductance of the resonance circuit on the power receiving device 20 side, for example, one power transmission device 10 has a one-to-many relationship with a plurality of power receiving devices 20. In the case of performing non-contact power feeding, the non-contact power feeding can be performed by adjusting the transmission efficiency to an appropriate value for each power receiving device 20.

= Second Example =
FIG. 5 shows a schematic configuration of a magnetic resonance type non-contact power feeding system 1 shown as the second embodiment. As shown in the figure, the non-contact power feeding system 1 includes a power transmission device 10 and a power reception device 20. The power transmission device 10 transmits power toward the power reception device 20 by magnetic resonance type non-contact power feeding. The power receiving device 20 receives power transmitted from the power transmitting device 10.

  FIG. 6 shows a main configuration of the power transmission device 10. As illustrated in FIG. 1, the power transmission device 10 includes a power transmission circuit 11, a power measurement circuit 12, a power supply circuit 13, and an angle adjustment mechanism 14.

  The power transmission circuit 11 includes a power transmission coil 111, an adjustment coil 112, a power transmission capacitor 113, and a control circuit 114. The power transmission coil 111 and the power transmission capacitor 113 constitute a resonance circuit. The power transmission coil 111 has a configuration in which a conductor wire such as an insulating coated copper wire is wound around the winding axis in a ring a predetermined number of times. The power transmission coil 111 is fixed to, for example, an insulating frame. The adjustment coil 112 is disposed in the internal space of the power transmission coil 111. The adjustment coil 112 is magnetically coupled to the power transmission coil 111. The control circuit 114 includes a driver circuit (a gate driver, a half bridge driver, etc.), and generates a drive current having a predetermined frequency to be supplied to the resonance circuit based on the power supplied from the power supply circuit 13.

  The power supply circuit 13 is, for example, a switching or linear circuit, and supplies driving power to the power transmission circuit 11.

  The power measurement circuit 12 measures the power consumption of the power transmission circuit 11. The power measurement circuit 12 includes a voltmeter and an ammeter for measuring the power supplied from the power supply circuit 13 to the power transmission circuit 11. The power consumption of the power transmission circuit 11 is an index representing the transmission efficiency of contactless power feeding.

  The angle adjustment mechanism 14 adjusts an angle θ2 formed by the direction of the winding axis of the power transmission coil 111 and the direction of the winding axis of the adjustment coil 112 according to the power consumption of the power transmission circuit 11 measured by the power measurement circuit 12. The transmission efficiency of contactless power feeding is adjusted. The angle adjusting mechanism 14 is configured by using, for example, a microcomputer, an ASIC, a motor driving mechanism, a servo motor, a stepping motor, or the like.

  FIG. 7 shows a main configuration of the power receiving device 20 of the second embodiment. As shown in the figure, the power receiving device 20 includes a power receiving circuit 21 and a load 23.

  The power receiving circuit 21 includes a power receiving coil 211, a power receiving capacitor 213, and a rectifier circuit 214. The power receiving coil 211 and the power receiving capacitor 213 constitute a resonance circuit. The power receiving coil 211 has a configuration in which a conductor wire such as an insulation-coated copper wire is wound around the winding axis in a ring a predetermined number of times. The rectifier circuit 214 converts AC power received by the resonance circuit into DC power and supplies the DC power to the load 23.

  FIG. 8 illustrates an arrangement example of the power transmission coil 111 and the adjustment coil 112 of the power transmission device 10 and the power reception coil 211 of the power reception device 20. In this example, the power transmission coil 111 and the power reception coil 211 are arranged so that their respective winding axes coincide with the same straight line parallel to the x-axis of the three-dimensional orthogonal coordinate system set in FIG. . In the following description, it is assumed that the power transmission coil 111 and the power reception coil 211 are fixed so that the directions of the respective winding axes are maintained in this state.

  The outer diameter of the adjustment coil 112 is smaller than the inner diameter of the power transmission coil 111, and the adjustment coil 112 is arranged in the internal space of the power transmission coil 111 so that the center thereof coincides with the center of the power transmission coil 111. By making the adjustment coil 112 and the power transmission coil 111 have such a configuration, the power transmission device 10 can be reduced in size.

  For example, the adjustment coil 112 is pivotally supported by a rotation axis passing through the center thereof and parallel to the z-axis. By rotating the adjustment coil 112 around the rotation axis, the direction of the winding axis of the adjustment coil 112 can be rotated in a plane parallel to the xy plane, whereby the winding axis of the power transmission coil 111 is rotated. The angle θ2 formed by the direction and the direction of the winding axis of the adjustment coil 112 can be changed.

  Here, it has been found that in the resonance circuit of the power transmission circuit 11, the value of the inductance indicated by the power transmission coil 111 varies depending on the angle θ2. Further, as described in the first embodiment, by changing the angle θ2, the resonance frequency (natural resonance frequency) of the resonance circuit of the power transmission circuit 11 can be changed, and the resonance frequency (f1 or f2) described above. Can be changed. Then, the transmission power from the power transmission device 10 to the power reception device 20 is changed by changing the resonance frequency (f1 or f2). Therefore, the transmission efficiency of the non-contact power supply can be controlled by changing the angle θ2. .

  For this reason, even when the inductance L of the coil constituting the resonance circuit of the power transmission circuit 11 or the power reception circuit 21 or the capacitance C of the capacitor constituting the resonance circuit changes, the angle θ2 is changed to change the contactless power feeding. The transmission efficiency can be controlled, and power can be stably supplied from the power transmission device 10 to the power reception device 20 while maintaining the target transmission efficiency. The coupling coefficient k varies depending on, for example, the distance between the power transmission coil 111 and the power reception coil 211, the arrangement state of both, the environment in which both are disposed, and the resonance frequency ( If the shift of f1 or f2) is corrected by adjusting the angle θ2, the transmission efficiency can be further stabilized.

  In controlling the angle θ2, for example, the transmission efficiency is monitored as needed, and the angle θ2 is feedback-controlled so that the transmission efficiency is maximized. Also, for example, when the target transmission efficiency is determined in advance, the angle θ2 is feedback-controlled so that the target value is maintained. For example, when the transmission efficiency is limited in advance, the angle θ2 is feedback-controlled so as not to exceed the limit value.

  By the way, as described above, the transmission efficiency of the non-contact power feeding can be grasped by using the power consumption of the power transmission circuit 11 as an index. The transmission efficiency is, for example, the transmission power from the power transmission device 10 and the power reception of the power reception device 20. You may obtain | require from ratio with electric power. In that case, for example, the power transmission device 10 and the power reception device 20 are communicably connected so that the power reception power of the power reception device 20 can be grasped on the power transmission device 10 side.

= Third Example =
FIG. 9 shows a schematic configuration of a magnetic resonance type non-contact power feeding system 1 shown as the third embodiment. As shown in the figure, the non-contact power feeding system 1 includes a power transmission device 10 and a power reception device 20. The power transmission device 10 transmits power toward the power reception device 20 by magnetic resonance type non-contact power feeding. The power receiving device 20 receives power transmitted from the power transmitting device 10.

  FIG. 10 shows a main configuration of the power transmission device 10 of the third embodiment. The configuration of the power transmission device 10 of the third embodiment is the same as that of the power transmission device 10 of the second embodiment.

  FIG. 11 shows a main configuration of the power receiving device 20. The configuration of the power receiving device 20 of the third embodiment is the same as that of the power receiving device 20 of the first embodiment.

  FIG. 12 illustrates an arrangement example of the power transmission coil 111 and the adjustment coil 112 of the power transmission device 10 and the power reception coil 211 and the adjustment coil 212 of the power reception device 20. In this example, the power transmission coil 111 and the power reception coil 211 are arranged so that their respective winding axes coincide with the same straight line parallel to the x-axis of the three-dimensional orthogonal coordinate system set in FIG. .

  In the non-contact power feeding system 1 according to the third embodiment, the power transmission device 10 changes the angle θ2 formed by the direction of the winding axis of the power transmission coil 111 and the direction of the winding axis of the adjustment coil 112, thereby Control the transmission efficiency of contact power supply. Further, the power receiving device 20 controls the transmission efficiency of the non-contact power feeding by changing the angle θ1 formed by the direction of the winding axis of the power receiving coil 211 and the direction of the winding axis of the adjustment coil 212. Thus, in the non-contact power feeding system 1 of the third embodiment, since both the power transmitting device 10 and the power receiving device 20 adjust the transmission efficiency by changing the inductance of the resonance circuit, the transmission efficiency is more reliably stabilized. Can be maintained.

  The embodiment of the present invention has been described above, but the above description is intended to facilitate understanding of the present invention and does not limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof.

  In the above, the power receiving coil 211 is fixed and the adjustment coil 212 is rotated to change the angle θ1, but conversely, the power receiving coil 211 may be rotated to change the angle θ1. . Further, the angle θ1 may be changed by rotating both the power receiving coil 211 and the adjustment coil 212. Similarly, in the above description, the power transmission coil 111 is fixed and the adjustment coil 112 is rotated to change the angle θ2, but conversely, the power transmission coil 111 is rotated to change the angle θ2. May be. Further, the angle θ2 may be changed by rotating both the power transmission coil 111 and the adjustment coil 112.

  In the above description, the adjustment coil 112 (or the adjustment coil 212) has a diameter smaller than that of the power transmission coil 111 (or the power reception coil 211), but the adjustment coil 112 (or the adjustment coil 212). The diameter of the power transmission coil 111 (or the power receiving coil 211) may be the same (or substantially the same), or the diameter may be larger than the diameter of the power transmission coil 111 (or the power receiving coil 211). It may be adopted.

DESCRIPTION OF SYMBOLS 1 Non-contact electric power feeding system, 10 Power transmission apparatus, 11 Power transmission circuit, 12 Power measurement circuit, 13 Power supply circuit, 14 Angle adjustment mechanism, 111 Power transmission coil, 112 Adjustment coil, 113 Power transmission capacitor, 114 Control circuit, 20 Power reception apparatus, 21 Power receiving circuit, 22 Power measuring circuit, 23 Load, 24 Angle adjustment mechanism, 211 Power receiving coil, 212 Adjustment coil, 213 Power receiving capacitor, 214 Rectifier circuit

Claims (11)

A power transmission device that has a resonance circuit on the power transmission side configured by using a power transmission coil and a capacitor and performs magnetic field resonance type non-contact power feeding,
A non-contact power feeding system including a power receiving-side resonance circuit configured using a power receiving coil and a capacitor and receiving power from the power transmitting device by the non-contact power feeding,
The power receiving device is:
A power receiving side adjustment coil provided in an inner space of the power receiving coil, and a direction of a winding axis thereof rotatably supported with respect to a direction of the winding axis of the power receiving coil;
The direction of the winding axis of the power receiving coil and the winding axis of the power receiving side adjustment coil are set so that the transmission efficiency is maintained at a target value during power feeding from the power transmitting device to the power receiving device by the non-contact power feeding. A power receiving side angle adjusting mechanism for changing a resonance frequency of the power receiving side resonance circuit by adjusting an angle θ1 formed by the direction;
A non-contact power supply system. A power transmission device that has a resonance circuit on the power transmission side configured by using a power transmission coil and a capacitor and performs magnetic field resonance type non-contact power feeding,
A non-contact power feeding system including a power receiving-side resonance circuit configured using a power receiving coil and a capacitor and receiving power from the power transmitting device by the non-contact power feeding,
The power transmission device is:
A power transmission side adjustment coil provided in the internal space of the power transmission coil, the direction of the winding axis of which is rotatably supported with respect to the direction of the winding axis of the power transmission coil;
The direction of the winding axis of the power transmission coil and the winding axis of the power transmission side adjustment coil are set so that transmission efficiency is maintained at a target value during power feeding from the power transmission device to the power reception device by the non-contact power feeding. A power transmission side angle adjusting mechanism that changes a resonance frequency of the resonance circuit on the power transmission side by adjusting an angle θ2 formed by the direction;
A non-contact power supply system. The contactless power supply system according to claim 1,
The power transmission device is:
A power transmission side adjustment coil provided in the internal space of the power transmission coil, the direction of the winding axis of which is rotatably supported with respect to the direction of the winding axis of the power transmission coil;
The direction of the winding axis of the power transmission coil and the winding axis of the power transmission side adjustment coil are set so that transmission efficiency is maintained at a target value during power feeding from the power transmission device to the power reception device by the non-contact power feeding. A power transmission side angle adjusting mechanism that changes a resonance frequency of the resonance circuit on the power transmission side by adjusting an angle θ2 formed by the direction;
A non-contact power supply system. The contactless power supply system according to claim 1,
The power receiving device includes a power measurement circuit that measures received power of the resonance circuit on the power receiving side,
The power receiving side angle adjusting mechanism controls an angle θ1 formed by the direction of the winding axis of the power receiving coil and the direction of the winding axis of the power receiving side adjustment coil so that the received power is maintained at a target value. A contactless power supply system. It is a non-contact electric power feeding system according to claim 2 or 3,
The power transmission device includes a power measurement circuit that measures transmission power of the resonance circuit on the power transmission side,
The power transmission side angle adjustment mechanism controls an angle θ2 formed by the direction of the winding axis of the power transmission coil and the direction of the winding axis of the power transmission side adjustment coil so that the transmitted power is maintained at a target value. A contactless power supply system. The contactless power supply system according to claim 1,
The power receiving coil and the power receiving side adjustment coil are each configured by winding conductor wires in an annular shape with different diameters, and one coil is configured to be accommodated in the internal space of another coil. Contactless power supply system. It is a non-contact electric power feeding system according to claim 2 or 3,
The power transmission coil and the power transmission side adjustment coil are each configured by winding conductor wires in an annular shape with different diameters, and one coil is configured to be accommodated in an internal space of another coil. Contactless power supply system. The power receiving device in the non-contact power feeding system according to claim 1,
A power receiving side adjustment coil provided in an inner space of the power receiving coil, and a direction of a winding axis thereof rotatably supported with respect to a direction of the winding axis of the power receiving coil;
The direction of the winding axis of the power receiving coil and the winding axis of the power receiving side adjustment coil are set so that the transmission efficiency is maintained at a target value during power feeding from the power transmitting device to the power receiving device by the non-contact power feeding. A power receiving side angle adjusting mechanism for changing a resonance frequency of the power receiving side resonance circuit by adjusting an angle θ1 formed by the direction;
A power receiving apparatus comprising: The power transmission device in the non-contact power feeding system according to claim 2 or 3,
A power transmission side adjustment coil provided in the internal space of the power transmission coil, the direction of the winding axis of which is rotatably supported with respect to the direction of the winding axis of the power transmission coil;
The direction of the winding axis of the power transmission coil and the winding axis of the power transmission side adjustment coil are set so that transmission efficiency is maintained at a target value during power feeding from the power transmission device to the power reception device by the non-contact power feeding. A power transmission side angle adjusting mechanism that changes a resonance frequency of the resonance circuit on the power transmission side by adjusting an angle θ2 formed by the direction;
A power transmission device comprising: The power receiving device in the non-contact power feeding system according to claim 4,
A power measurement circuit for measuring the received power of the power-resonant resonance circuit;
The power receiving side angle adjusting mechanism controls an angle θ1 formed by the direction of the winding axis of the power receiving coil and the direction of the winding axis of the power receiving side adjustment coil so that the received power is maintained at a target value. Power receiving device. The power transmission device in the non-contact power feeding system according to claim 5,
A power measurement circuit for measuring the transmission power of the resonance circuit on the power transmission side,
The power transmission side angle adjustment mechanism controls an angle θ2 formed by the direction of the winding axis of the power transmission coil and the direction of the winding axis of the power transmission side adjustment coil so that the transmitted power is maintained at a target value. Power transmission device.

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