Wireless power supply system and operation body

Abstract

To continuously change an operation mode of a plurality of electronic components mounted on an operation body by a simple method.SOLUTION: A magnetic field resonance-type wireless power supply system includes a transmission-side resonator including a transmission-side coil 11, and an operation body 40 that includes a plurality of reception-side resonators including reception-side coils 21A and 21B, and light emission elements being a plurality of electronic components that each operate with power from the plurality of reception-side resonators, and is configured such that both the position and orientation with respect to the transmission-side coil 11 are changeable. The area of a virtual plane surrounded by the reception-side coils 21A and 21B is smaller than the area of a virtual plane surrounded by the transmission-side coil 11. The plurality of reception-side resonators include the reception-side coils 21A and 21B that are disposed at different positions.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a wireless power feeding system that transmits power contactlessly from a power transmitting coil to a power receiving coil by a magnetic field resonance method, and to an actuator applied to the system. [Background technology]

[0002] Patent Document 1 discloses a light-emitting block having a rectangular parallelepiped shape that emits light toward the outside. The light-emitting block disclosed in Patent Document 1 has a hollow module having a rectangular parallelepiped shape and an LED unit disposed inside the module. The module has a light-transmitting peripheral wall and two ends that face each other vertically and cover the upper and lower openings of the peripheral wall. A connector sub-module and a connection board are provided at the ends for mechanically connecting to other light-emitting blocks. An LED unit is attached to the inner surface of the connection board. The LED unit has an appropriate number of LEDs of each of the RGB colors and can output multi-color light.

[0003] In such a light-emitting block, the brightness of the light-emitting elements of each color of the LED unit is controlled by an external control device. The light emitted from the LED unit passes through the surrounding wall, causing the light-emitting block to emit light. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2009-165593 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-mentioned light-emitting block, in order to control the light-emitting mode of the LED unit, it is necessary to electronically control each light-emitting element of the LED unit by an external control device. Also, the above-mentioned effecting block supplies power from a power source to the LED unit by wire. For these reasons, there is a demand for a light-emitting block that can continuously change the light-emitting mode of a plurality of light-emitting elements by a simple method. Also, there is a demand for an operating body that can continuously change the operating mode of a plurality of electronic components by a simple method. [Means for solving the problem]

[0006] Various aspects of a wireless power supply system and an effector for solving the above problems will be described below. [Aspect 1] A wireless power supply system that transmits power from a power transmitting coil to a power receiving coil in a non-contact manner using a magnetic resonance method, a power transmitting side resonator including the power transmitting side coil; an actuator having a plurality of power receiving side resonators including the power receiving side coil and a plurality of electronic components each operated by power from the power receiving side resonators, the actuator being configured such that at least one of a position and an orientation with respect to the power transmitting side coil can be changed; an area of ​​an imaginary plane surrounded by the power receiving side coil is smaller than an area of ​​an imaginary plane surrounded by the power transmitting side coil, The plurality of power receiving side resonators include the power receiving side coils provided at different positions from each other. Wireless power supply system.

[0007] A wireless power transfer system that transmits power contactlessly using a magnetic resonance method is composed of a power transmitting side resonator including a power transmitting side coil, and a power receiving side resonator including a power receiving side coil and having the same resonant frequency as the power transmitting side resonator. When an alternating current flows through the power transmitting side coil, the vibration of the magnetic field generated is transmitted to the power receiving side resonator that resonates at the same resonant frequency as the power transmitting side resonator, and a current flows through the power receiving side resonator.

[0008] The direction and magnitude of the magnetic field around the power transmitting coil changes continuously depending on the position. The magnetic field is oriented on one side in a direction perpendicular to an imaginary plane enclosed by the power transmitting coil at the center of the power transmitting coil, and on one side in a circumferential direction centered on the cross section of the coil wire near the coil wire of the power transmitting coil.

[0009] Here, if the direction perpendicular to the imaginary plane enclosed by the power receiving coil is defined as the main direction, then if the magnetic field strength is the same, the power supply efficiency of the power receiving coil will be highest when the main direction of the power receiving coil coincides with the direction of the magnetic field of the power transmitting coil that penetrates the power receiving coil.

[0010] If the magnetic field strength is the same, the power supply efficiency of the power receiving coil is lowest when the main direction of the power receiving coil and the direction of the magnetic field of the power transmitting coil that penetrates the power receiving coil are perpendicular to each other. Furthermore, when the main direction of the power receiving coil and the direction of the magnetic field of the power transmitting coil penetrating the power receiving coil change from a state in which they are aligned to a state in which they are perpendicular to each other, the power supply efficiency of the power receiving coil decreases continuously.

[0011] The strength of the magnetic field decreases as the distance from the power transmitting coil increases. According to the above configuration, the multiple power receiving side resonators provided in the actuator include power receiving side coils provided at different positions. Also, the area of ​​the imaginary plane surrounded by the power receiving side coil is smaller than the area of ​​the imaginary plane surrounded by the power transmitting side coil. Therefore, by changing the relative position and orientation of the power transmitting side coil and the actuator, the direction and strength of the magnetic field penetrating the power receiving side coil become different between the power receiving side coils located at different positions. As a result, the power supply efficiency of the power receiving side coil becomes different between the power receiving side coils located at different positions. As a result, by continuously changing the relative position and orientation of the power transmitting side coil and the actuator, the operation modes of the multiple electronic components provided in the actuator are continuously changed.

[0012] Therefore, the operating modes of the plurality of electronic components provided in the operating body can be continuously changed by a simple method. [Aspect 2] When a direction perpendicular to a virtual plane surrounded by the power receiving side coil is defined as a main direction, The plurality of power receiving side resonators include the power receiving side coils whose main directions are different from each other. 2. The wireless power supply system according to claim 1.

[0013] According to this configuration, the multiple power receiving side resonators provided in the actuator include power receiving side coils having different main directions. Therefore, by changing the relative position and orientation of the power transmitting side coil and the actuator, the direction and strength of the magnetic field penetrating the power receiving side coils become different between the power receiving side coils having different main directions. In addition, the power supply efficiency of the power receiving side coils becomes different between the power receiving side coils having different main directions. As a result, by continuously changing the relative position and orientation of the power transmitting side coil and the actuator, the operation modes of the multiple electronic components are continuously changed. Therefore, the operation modes of the multiple electronic components provided in the actuator can be continuously changed by a simple method.

[0014] [Aspect 3] the electronic component is a light-emitting element, The light-emitting elements electrically connected to the power-receiving coils having different main directions have different light-emitting colors. The wireless power supply system according to embodiment 2.

[0015] According to this configuration, the relative position and orientation of the power transmitting coil and the actuator can be continuously changed, thereby continuously changing the light emission intensity of each of the multiple light emitting elements. This makes it possible to, for example, make only one light emitting element emit light, or make multiple light emitting elements emit light simultaneously. Also, for example, from a state in which only one light emitting element is emitting light, it is possible to continuously lower the light emission intensity of the light emitting element while continuously increasing the light emission intensity of the other light emitting elements.

[0016] [Aspect 4] An actuator applied to a wireless power feeding system that transmits power from a power transmitting coil to a power receiving coil in a non-contact manner by a magnetic resonance method, a power receiving side resonator including the power receiving side coil and a plurality of electronic components each operated by power from the power receiving side resonators, and at least one of a position and an orientation with respect to the power transmitting side coil is changeable; The plurality of power receiving side resonators include the power receiving side coils provided at different positions from each other. Actuator.

[0017] According to this configuration, it is possible to achieve the same advantageous effects as those of the wireless power feeding system according to the first aspect. [Aspect 5] When a direction perpendicular to a virtual plane surrounded by the power receiving side coil is defined as a main direction, The plurality of power receiving side resonators include the power receiving side coils whose main directions are different from each other. The actuator according to embodiment 4.

[0018] According to this configuration, it is possible to achieve the same advantageous effects as those of the wireless power feeding system according to the second aspect. Effect of the Invention

[0019] According to the present invention, the operation modes of a plurality of electronic components provided in an operating body can be continuously changed by a simple method. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a plan view of a wireless power supply system according to an embodiment. [Diagram 2] FIG. 2 is a perspective view of an actuator constituting the wireless power supply system of FIG. [Diagram 3] FIG. 3 is a cross-sectional view showing the positional relationship between the power transmitting coil, the magnetic field lines around the power transmitting coil, and the power receiving coil of the actuator. [Figure 4] FIG. 4 is a cross-sectional view showing the positional relationship between the power transmitting coil, the magnetic field lines around the power transmitting coil, and the power receiving coil of the actuator. [Diagram 5]FIG. 5 is a cross-sectional view showing the positional relationship between the power transmitting coil, the magnetic field lines around the power transmitting coil, and the power receiving coil of the actuator. [Figure 6] FIG. 6 is a perspective view of an operating body according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, an embodiment of a wireless power supply system and an actuator will be described with reference to Figs. As shown in FIGS. 1 and 2, the wireless power feeding system transmits power in a non-contact manner from a power transmitting coil 11 to power receiving coils 21A to 21C by using a magnetic field resonance method.

[0022] The wireless power feeding system includes a power transmitting side resonator 10, and an actuation body 40 having a plurality of power receiving side resonators 20A to 20C and a plurality of light emitting elements 30A to 30C. Next, each component of the wireless power supply system will be described.

[0023] <Power transmitting side resonator 10> 1, the power transmitting side resonator 10 includes a power transmitting side coil 11 and a circuit 12 that sets the resonant frequency of the power transmitting side coil 11. The resonant frequency is, for example, 6.78 MHz.

[0024] The power transmitting coil 11 has, for example, a circular shape. Alternatively, the power transmitting coil 11 may have a rectangular shape. An imaginary plane VO surrounded by the power transmitting coil 11 is a plane along the paper surface of FIG.

[0025] The circuit 12 has a known configuration including a capacitor and an inductor, and is located between an AC power source (not shown) and the power transmitting coil 11, and is electrically connected to the AC power source and the power transmitting coil 11.

[0026] <Actuator 40> As shown in Figs. 1 and 2, the device includes a plurality of power receiving side resonators 20A to 20C, a plurality of light emitting elements 30A to 30C, and a housing 41 that houses the power receiving side resonators 20A to 20C and the light emitting elements 30A to 30C.

[0027] (Case 41) 2, the housing 41 has, for example, a rectangular parallelepiped shape. The housing 41 of this embodiment has a cubic shape.

[0028] The outer surface 42 of the housing 41 has a pair of first surfaces 42A that are parallel to each other, a pair of second surfaces 42B that are perpendicular to the first surfaces 42A and parallel to each other, and a pair of third surfaces 42C that are perpendicular to both the first surfaces 42A and the second surfaces 42B and parallel to each other.

[0029] The housing 41 has visible light transmissibility and is formed of a known light guide made of resin. The actuating body 40 is separated from the power transmitting side coil 11. That is, the actuating body 40 is configured so that both the position and the orientation of the actuating body 40 with respect to the power transmitting side coil 11 can be changed.

[0030] (Receiving side resonators 20A to 20C) As shown in Figs. 1 and 2, the actuation body 40 of this embodiment includes two each of the first power receiving side resonators 20A, the second power receiving side resonators 20B, and the third power receiving side resonators 20C.

[0031] The power receiving side resonators 20A to 20C include power receiving side coils 21A to 21C and a circuit 22 that matches the resonant frequency of the power receiving side coils 21A to 21C with the transmission frequency of the power transmitting side coil 11.

[0032] The power receiving side coils 21A to 21C are, for example, circular in shape. Alternatively, the power receiving side coils 21A to 21C may be rectangular in shape. The areas of imaginary planes VA to VC enclosed by the power receiving side coils 21A to 21C, respectively, are set smaller than the area of ​​imaginary plane VO enclosed by the power transmitting side coil 11.

[0033] The multiple power receiving side resonators 20A to 20C include power receiving side coils 21A to 21C provided at different positions from each other. Directions perpendicular to imaginary planes VA to VC enclosed by the power receiving side coils 21A to 21C, respectively, are defined as main directions A to C. The power receiving side resonators 20A to 20C include the power receiving side coils 21A to 21C whose main directions A to C are different from one another.

[0034] The two first power receiving side coils 21A are disposed inside the two first surfaces 42A, respectively. An imaginary plane VA surrounded by the first power receiving side coils 21A is parallel to the first surfaces 42A.

[0035] The two second power receiving side coils 21B are disposed on the inner sides of the two second surfaces 42B, respectively. An imaginary plane VB surrounded by the second power receiving side coils 21B is parallel to the second surface 42B.

[0036] The two third power receiver coils 21C are disposed inside the two third surfaces 42C, respectively. An imaginary plane VC surrounded by the third power receiver coils 21C is parallel to the third surface 42C.

[0037] The circuit 22 has a known configuration including a capacitor and an inductor, and is electrically connected to the power receiving side coils 21A to 21 C. One circuit 22 is provided for each of the power receiving side coils 21A to 21C.

[0038] (Light emitting elements 30A to 30C) The light emitting elements 30A to 30C are electrically connected to the power receiving side resonators 20A to 20C, respectively, and are operated by power from the power receiving side resonators 20A to 20C, respectively.

[0039] In this embodiment, one first light emitting element 30A is provided for one first power receiving side resonator 20A. One second light emitting element 30B is provided for one second power receiving side resonator 20B. Also, one third light emitting element 30C is provided for one third power receiving side resonator 20C.

[0040] The light emitting elements 30A to 30C are light emitting diodes (LEDs). The light emitted by the first light emitting element 30A is, for example, red. The light emitted by the second light emitting element 30B is, for example, blue. The light emitted by the third light emitting element 30C is, for example, green.

[0041] The light emitting elements 30A to 30C electrically connected to the power receiving side coils 21A to 21C having different main directions A to C emit light in different colors. <Action of this embodiment> The wireless power feeding system that transmits power contactlessly by the magnetic field resonance method is composed of a power transmitting side resonator 10 including a power transmitting side coil 11, and power receiving side resonators 20A to 20C including power receiving side coils 21A to 21C and having the same resonance frequency as the power transmitting side resonator 10. When an AC current is applied to the power transmitting side coil 11 from an AC power source, the vibration of the magnetic field generated is transmitted to the power receiving side resonators 20A to 20C that resonate at the same resonance frequency as the power transmitting side resonator 10, causing a current to flow in the power receiving side resonators 20A to 20C.

[0042] As indicated by the dashed lines in FIGS. 3 to 5, the direction and magnitude of the magnetic field around power transmission side coil 11 changes continuously depending on the position. The direction of the magnetic field, at the center of the power transmitting side coil 11, is on one side (the upper side in Figs. 3 to 5) in a direction perpendicular to the imaginary plane VO surrounded by the power transmitting side coil 11. Moreover, in the vicinity of the coil wire 11a of the power transmitting side coil 11, the direction of the magnetic field is on one side in the circumferential direction centered on the cross section of the coil wire 11a.

[0043] If the magnetic field strength is the same, the power supply efficiency of the power receiving side coil 21A (21B, 21C) is highest when the main direction A (B, C) of the power receiving side coil 21A (21B, 21C) coincides with the direction of the magnetic field of the power transmitting side coil 11 that penetrates the power receiving side coil 21A (21B, 21C).

[0044] If the magnetic field strength is the same, the power supply efficiency of the power receiving side coil 21A (21B, 21C) is lowest when the main direction A (B, C) of the power receiving side coil 21A (21B, 21C) is perpendicular to the direction of the magnetic field of the power transmitting side coil 11 that penetrates the power receiving side coil 21A (21B, 21C).

[0045] In addition, when the main direction A (B, C) of the power receiving side coil 21A (21B, 21C) and the direction of the magnetic field of the power transmitting side coil 11 penetrating the power receiving side coil 21A (21B, 21C) change from a state in which they are aligned to a state in which they are perpendicular to each other, the power supply efficiency of the power receiving side coil 21A (21B, 21C) continuously decreases.

[0046] The strength of the magnetic field decreases as the distance from the power transmitting coil 11 increases. As shown in FIG. 3, for example, the actuator 40 is positioned directly above the center of the power transmitting coil 11 so that the first surface 42A is aligned with the imaginary plane VO of the power transmitting coil 11. In this case, the main direction A of the first power receiving coil 21A and the direction of the magnetic field of the power transmitting coil 11 penetrating the first power receiving coil 21A coincide with each other. As a result, the first power receiving coil 21A is fed with high power feeding efficiency, and the first light emitting element 30A emits light with high light emission intensity. At this time, the power feeding efficiency of the second power receiving coil 21B and the third power receiving coil 21C is the lowest, so that the second light emitting element 30B and the third light emitting element 30C do not emit light. As a result, the entire housing 41 emits light in red.

[0047] As shown in FIG. 4, for example, the actuator 40 is positioned directly above the center of the power transmitting coil 11 so that the second surface 42B is aligned with the imaginary plane VO of the power transmitting coil 11. In this case, the main direction B of the second power receiving coil 21B coincides with the direction of the magnetic field of the power transmitting coil 11 penetrating the second power receiving coil 21B. As a result, the second power receiving coil 21B is fed with high power feeding efficiency, and the second light emitting element 30B emits light with high light emission intensity. At this time, the power feeding efficiency of the first power receiving coil 21A and the third power receiving coil 21C is the lowest, so that the first light emitting element 30A and the third light emitting element 30C do not emit light. As a result, the entire housing 41 emits blue light.

[0048] 5, for example, the actuator 40 is positioned directly above the coil wire 11a of the power transmitting coil 11 so that the first surface 42A is aligned with the imaginary plane VO of the power transmitting coil 11. In this case, a magnetic field generated near the coil wire 11a of the power transmitting coil 11 penetrates the first power receiving coil 21A and the second power receiving coil 21B. This causes the first light emitting element 30A and the second light emitting element 30B to emit light simultaneously. As a result, the entire housing 41 emits light in purple.

[0049] Depending on the position and attitude of the actuator 40, the entire housing 41 can be made to emit light in green or in a mixture of red, blue, and green. According to this embodiment, the power receiving side resonators 20A to 20C provided in the actuation body 40 include the power receiving side coils 21A to 21C provided at different positions. The power receiving side coils 21A to 21C have different main directions A to C. The area of ​​the imaginary planes VA to VC surrounded by the power receiving side coils 21A to 21C is smaller than the area of ​​the imaginary plane VO surrounded by the power transmitting side coil 11. Therefore, by changing the relative position and orientation of the power transmitting side coil 11 and the actuation body 40, the direction and strength of the magnetic field penetrating the power receiving side coils 21A to 21C become different between the power receiving side coils 21A to 21C that are located at different positions and have different main directions A to C. As a result, the power supply efficiency of the power receiving side coils 21A to 21C becomes different between the power receiving side coils 21A to 21C that have different main directions A to C. As a result, by continuously changing the relative position and orientation of the power transmitting side coil 11 and the actuation body 40, the operation modes, that is, the light emission intensities of the plurality of light emitting elements 30A to 30C are continuously changed.

[0050] <Effects of this embodiment> (1) The wireless power feeding system includes a power transmitting side resonator 10, and an actuator 40 having a plurality of power receiving side resonators 20A-20C and light emitting elements 30A-30C which are electronic components that are respectively operated by power from the plurality of power receiving side resonators 20A-20C, and configured to be changeable in both position and orientation with respect to a power transmitting side coil 11. The area of ​​imaginary planes VA-VC surrounded by the power receiving side coils 21A-21C is smaller than the area of ​​imaginary plane VO surrounded by the power transmitting side coil 11. The plurality of power receiving side resonators 20A-20C include power receiving side coils 21A-21C provided at different positions from each other. More specifically, the plurality of power receiving side resonators 20A-20C include power receiving side coils 21A-21C having main directions A-C different from each other.

[0051] According to such a configuration, the above-mentioned effects are achieved, so that the operation modes of the plurality of light-emitting elements 30A to 30C provided in the actuation body 40 can be changed continuously by a simple method. (2) The light emitting elements 30A to 30C electrically connected to the power receiving side coils 21A to 21C having different main directions A to C have different light emission colors.

[0052] According to this configuration, the light emission intensity of each of the plurality of light emitting elements 30A to 30C can be continuously changed by continuously changing the relative position and orientation of the power transmitting coil 11 and the actuator 40. This makes it possible to, for example, make only the first light emitting element 30A emit light, or make the two light emitting elements 30A and 30B or the three light emitting elements 30A to 30C emit light simultaneously. Also, for example, from a state in which the first light emitting element 30A is emitting light, it is possible to continuously increase the light emission intensity of the second light emitting element 30B (third light emitting element 30C) while continuously decreasing the light emission intensity of the first light emitting element 30A.

[0053] <Example of change> This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that there is no technical contradiction.

[0054] The actuator 40 can also be configured by connecting a plurality of housings 41. For example, as shown in Fig. 6, a connecting portion can be provided in a part of the housing 41, and a plurality of housings 41 can be connected like a Rubik's Cube (registered trademark).

[0055] The shape of the housing 41 is not limited to a cube. That is, the housing 41 may be a rectangular parallelepiped in which at least one of the pair of first faces 42A, the pair of second faces 42B, and the pair of third faces 42C that are parallel to each other are rectangular.

[0056] The shape of the housing 41 is not limited to a rectangular parallelepiped, and may be other three-dimensional shapes such as a cylindrical shape, a cone shape, or a triangular pyramid shape. The electronic components are not limited to light-emitting elements, but may be motors. In this case, the motors may be arranged such that the axial directions of the output shafts of the motors are different from each other.

[0057] In the above embodiment, the actuator 40 is configured so that both the position and the orientation with respect to the power transmitting side coil 11 can be changed, but this is not limiting. That is, the actuator 40 may be configured so that either the position or the orientation with respect to the power transmitting side coil 11 can be changed.

[0058] In the above embodiment, the power receiving side coils 21A to 21C are arranged so that the main directions A to C are different from one another. However, the power receiving side coils 21A to 21C may be arranged so that the main directions A to C are the same and only the positions are different from one another.

[0059] The wireless power supply system is not limited to having only one power transmitting side resonator 10, and may have a plurality of power transmitting side resonators 10. [Explanation of symbols]

[0060] 10...Transmission side resonator 11...Transmission coil 11a…Coil wire 12...Circuit 20A…First receiving side resonator 20B...Second power receiving side resonator 20C…Third receiving side resonator 21A…First receiving coil 21B: Second power receiving coil 21C…Third receiving coil 22A…circuit 22B…Circuit 22C…Circuit 30A...First light emitting element 30B...Second light-emitting element 30C...Third light-emitting element 40...actuator 41…Housing 42...External surface 42A…Side 1 42B…Second side 42C...Side 3 VA, VB, VC, VO...Virtual plane

Claims

1. A wireless power supply system that transmits power from a power transmitting coil to a power receiving coil in a non-contact manner using a magnetic resonance method, a power transmitting side resonator including the power transmitting side coil; an actuator having a plurality of power receiving side resonators including the power receiving side coil and a plurality of electronic components each operated by power from the power receiving side resonators, the actuator being configured such that at least one of a position and an orientation with respect to the power transmitting side coil can be changed; an area of ​​an imaginary plane surrounded by the power receiving side coil is smaller than an area of ​​an imaginary plane surrounded by the power transmitting side coil, The plurality of power receiving side resonators include the power receiving side coils provided at different positions from each other. Wireless power supply system.

2. When a direction perpendicular to a virtual plane surrounded by the power receiving side coil is defined as a main direction, The plurality of power receiving side resonators include the power receiving side coils whose main directions are different from each other. The wireless power supply system according to claim 1 .

3. the electronic component is a light-emitting element, The light-emitting elements electrically connected to the power-receiving coils having different main directions have different light-emitting colors. The wireless power supply system according to claim 2 .

4. An actuator applied to a wireless power feeding system that transmits power from a power transmitting coil to a power receiving coil in a non-contact manner by a magnetic resonance method, a power receiving side resonator including the power receiving side coil and a plurality of electronic components each operated by power from the power receiving side resonators, and at least one of a position and an orientation with respect to the power transmitting side coil is changeable; The plurality of power receiving side resonators include the power receiving side coils provided at different positions from each other. Actuator.

5. When a direction perpendicular to a virtual plane surrounded by the power receiving side coil is defined as a main direction, The plurality of power receiving side resonators include the power receiving side coils whose main directions are different from each other. The actuator according to claim 4.

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