JP2013093965A - Power transmission system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power transmission system that enables prevention of leakage of undesired electric fields from occurring by arranging a passive electrode so as to surround an active electrode, thereby relaxing constraint of electrode shape.SOLUTION: An power transmission device or a power receiving device includes a columnar part and a first cylindrical part surrounding the columnar part. The power transmission device or the power receiving device includes a second cylindrical part, which can be placed between the columnar part and the first cylindrical part. Active electrodes or passive electrodes are formed to face each other along the vicinity of the outer surface of the columnar part and the vicinity of the inner surface of the second cylindrical part. Further, active electrodes or passive electrodes are formed to face each other along the vicinity of the inner surface of the first cylindrical part and the vicinity of the outer surface of the second cylindrical part. At least one of the second passive electrode of the power receiving device and the first passive electrode of the power transmission device is arranged to surround the first active electrode of the power transmission device and the second active electrode of the power receiving device.

Description

  The present invention relates to a power transmission system that transmits power without being physically connected.

  In recent years, many electronic devices that transmit power without contact have been developed. In order to transmit electric power in an electronic device in a non-contact manner, an electromagnetic induction type electric power transmission system in which coil modules are provided in both an electric power transmission unit and an electric power reception unit is often employed.

  However, in the magnetic field coupling method, the magnitude of the magnetic flux passing through each coil module is greatly affected by the electromotive force, and in order to transmit power with high efficiency, the coil module on the power transmission unit side (primary side) and the power reception unit side High accuracy is required for controlling the relative position in the coil plane direction with the coil module on the (secondary side). In addition, since the coil module is used as the coupling electrode, it is difficult to reduce the size of the power transmission unit and the power reception unit. Further, in portable devices and the like, it is necessary to consider the influence on the storage battery due to the heat generated by the coil, and there is also a problem that it may become a bottleneck in layout design.

  Therefore, for example, Patent Document 1 discloses a non-contact power transmission system using an electromagnetic induction type connector using a primary side connector and a secondary side connector having a concentric cylindrical structure. In Patent Document 1, when a primary side connector and a secondary side connector are coupled, a magnetic circuit closed by both primary and secondary cores provided in each coil unit is configured, and power is transferred from the primary side to the secondary side. Can be supplied. And even if it is a case where dispersion | variation arises in the length of both cores, and the insertion depth, the leakage of electromagnetic waves is suppressed and the power transmission efficiency is stabilized. Further, Patent Document 2 discloses a non-contact power supply device that supplies power from a primary coil to a secondary coil, which is applied to an electric shaver or an electric toothbrush.

JP 2000-260642 A Japanese Patent No. 4092895

  In the non-contact power transmission system using the electromagnetic induction method using the non-contact power supply device disclosed in Patent Document 2, there is a possibility that leakage of electromagnetic waves may affect external devices. In that respect, in Patent Document 1, since the relative position of both cores can be fixed, leakage of electromagnetic waves can be suppressed.

  However, in the non-contact power transmission system using the electric field coupling method without using the electromagnetic induction method, the passive coil can be obtained by simply replacing the primary coil and the secondary coil of Patent Document 2 with a pair of active electrodes facing each other. Depending on the structure, an unnecessary electric field leaks, leaving the possibility of affecting external devices.

  The present invention has been made in view of the above circumstances, and by disposing a passive electrode so as to surround the active electrode, it is possible to prevent an unnecessary electric field from leaking to the surroundings in advance. An object of the present invention is to provide a power transmission system capable of relaxing the restrictions.

  To achieve the above object, a power transmission system according to the present invention is connected between a first passive electrode, a first active electrode, and the first passive electrode and the first active electrode. A power transmission device having a voltage generation circuit; a second passive electrode opposed to the first passive electrode through a gap when the power transmission device is mounted; and the first active electrode through a gap. A power receiving system having a second active electrode facing each other, wherein at least one of the second passive electrode of the power receiving device and the first passive electrode of the power transmitting device is the The first active electrode of the power transmitting device and the second active electrode of the power receiving device are arranged so as to surround the periphery.

  In the above configuration, at least one of the second passive electrode of the power receiving device having a relatively low potential and the first passive electrode of the power transmitting device has the first active electrode and the power receiving device of the power transmitting device having a relatively high potential. Since it arrange | positions so that the circumference | surroundings of the 2nd active electrode may be enclosed, it becomes possible to prevent that an unnecessary electric field leaks to the circumference | surroundings.

  Further, in the power transmission system according to the present invention, the power transmission device or the power receiving device includes a columnar portion and a first cylindrical portion surrounding the columnar portion, and the first transmission portion extends along the vicinity of the outer surface of the columnar portion. One active electrode or the second active electrode is formed, and the first passive electrode or the second passive electrode is formed along the vicinity of the inner surface of the first cylindrical portion, and the power receiving device or The power transmission device includes a second cylindrical part, and a second active electrode or a first active electrode is formed along the vicinity of the inner surface of the second cylindrical part, and the second cylindrical part It is preferable that the second passive electrode or the first passive electrode is formed along the vicinity of the outer surface.

  In the above configuration, the power transmission device (power reception device) includes a columnar portion and a first cylindrical portion surrounding the columnar portion, and the power reception device (power transmission device) is provided between the columnar portion and the first cylindrical portion. A second cylindrical portion that can be attached is provided. Active electrodes (passive electrodes) facing each other along the vicinity of the outer surface of the columnar part and the vicinity of the inner surface of the second cylindrical part are connected to the vicinity of the inner surface of the first cylindrical part and the second cylindrical part. Passive electrodes (active electrodes) facing each other are formed along the vicinity of the outer surface of the power source, and at least one of the second passive electrode of the power receiving device and the first passive electrode of the power transmitting device, which are relatively low in potential, Since it is arranged so as to surround the first active electrode of the power transmitting device and the second active electrode of the power receiving device, which have a relatively high potential, it is possible to prevent an unnecessary electric field from leaking to the surroundings. Is possible.

  Further, in the power transmission system according to the present invention, the capacitance between the first passive electrode of the power transmission device and the second passive electrode of the power reception device is the first active electrode of the power transmission device. It is preferable that the electrode is disposed so as to be larger than the capacity between the first active electrode and the second active electrode of the power receiving device.

  In the above configuration, the capacitance between the first passive electrode of the power transmission device and the second passive electrode of the power reception device is between the first active electrode of the power transmission device and the second active electrode of the power reception device. Since both electrodes are arranged by adjusting the area where both electrodes face each other, the distance between both electrodes, or the lamination of a resin sheet having a high dielectric constant, etc. Can be transmitted.

  Further, in the power transmission system according to the present invention, the capacitance between the first passive electrode of the power transmission device and the second passive electrode of the power reception device is the first active electrode of the power transmission device. And the second active electrode of the power receiving device, it is preferable that the electrode is arranged to be at least twice the capacity.

  In the above configuration, the capacitance between the first passive electrode of the power transmission device and the second passive electrode of the power reception device is between the first active electrode of the power transmission device and the second active electrode of the power reception device. Since the electrodes are arranged so as to be at least twice the capacity of the power, it is possible to reliably transmit power with high transmission efficiency.

  In the power transmission system according to the present invention, the bottom surface side of the first passive electrode of the power transmission device and the top surface side of the second passive electrode of the power reception device are respectively closed by other passive electrodes. It is preferable.

  In the above configuration, since the bottom surface side of the first passive electrode of the power transmission device and the top surface side of the second passive electrode of the power reception device are respectively closed by other passive electrodes, an unnecessary electric field to the surroundings is generated. It becomes possible to prevent leakage more reliably.

  The power transmission system according to the present invention includes a third active electrode adjacent to the first active electrode of the power transmission device, and a fourth active electrode adjacent to the second active electrode of the power reception device. The second passive electrode of the power receiving device and the first passive electrode of the power transmitting device, the first active electrode and the third active electrode of the power transmitting device, and the power receiving device It is preferable that the second active electrode and the fourth active electrode are arranged so as to surround the periphery.

  The above-described configuration includes the third active electrode adjacent to the first active electrode of the power transmission device and the fourth active electrode adjacent to the second active electrode of the power reception device. The second passive electrode of the power receiving device and the first passive electrode of the power transmitting device are the first active electrode and the third active electrode of the power transmitting device, and the second active electrode and the fourth active electrode of the power receiving device. Therefore, it is possible to transmit power with high transmission efficiency and to perform data communication with high reliability.

  Moreover, the power transmission system according to the present invention includes a surface where the first active electrode of the power transmission device and the second active electrode of the power reception device face each other, and the first passive electrode of the power transmission device. The surfaces of the power receiving device facing the second passive electrode preferably have a waterproof structure.

  In the above configuration, the first active electrode of the power transmission device and the second active electrode of the power reception device face each other, and the first passive electrode of the power transmission device and the second passive electrode of the power reception device face each other. Since each surface to be waterproof has a waterproof structure, it is possible to ensure the waterproof property of the power transmission device even when used for equipment used around water.

  In the power transmission system according to the present invention, the power transmission device includes a secondary battery and a rectifier circuit, and the first output terminal and the second output terminal of the rectifier circuit are connected to the secondary battery. Preferably, the first input terminal is connected to the first passive electrode of the power transmission device, and the second input terminal is connected to the first active electrode of the power transmission device.

  In the above configuration, the power transmission device includes a secondary battery and a rectifier circuit, and the first output terminal and the second output terminal of the rectifier circuit are connected to the secondary battery, and the first input terminal Is connected to the first passive electrode of the power transmission device, and the second input terminal is connected to the first active electrode of the power transmission device, so that the casing of the power transmission device can be completely sealed, Even in the case of use in equipment used in the above, the water intrusion route to the power transmission device can be completely blocked, and waterproofness can be ensured reliably.

  In the power transmission system according to the present invention, it is preferable that the columnar part is a columnar shape, and the first cylindrical part and the second cylindrical part are cylindrical.

  In the above configuration, since the columnar part is a columnar shape and the first cylindrical part and the second cylindrical part are cylindrical, the power receiving apparatus is attached to the power transmitting apparatus with the power receiving apparatus mounted on the power transmitting apparatus. Can be rotated.

  In the power transmission system according to the present invention, at least one of the second passive electrode of the power receiving device having a relatively low potential and the first passive electrode of the power transmitting device has a first active of the power transmitting device having a relatively high potential. Since it arrange | positions so that the circumference | surroundings of the electrode and the 2nd active electrode of a receiving device may be enclosed, it becomes possible to prevent that an unnecessary electric field leaks to circumference | surroundings.

It is an equivalent circuit diagram which shows typically the structure of the electric power transmission system which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows the structure of the electric power transmission system which concerns on Embodiment 1 of this invention. It is a perspective view which shows typically the arrangement configuration of the active electrode and passive electrode of the electric power transmission system which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows the structure of the electric power transmission system which concerns on Embodiment 2 of this invention. It is a schematic cross section which shows the positional relationship of the electrode of the electric power transmission system which concerns on Embodiment 2 of this invention. It is a schematic diagram which shows the structure of the electrode of the electric power transmission system which concerns on Embodiment 3 of this invention. It is a schematic diagram which shows the structure of the power receiving jacket in the case of applying the electric power transmission system which concerns on Embodiment 3 of this invention to a smart phone (electronic device). It is a perspective view which shows typically the structure of the power transmission apparatus in the case of applying the electric power transmission system which concerns on Embodiment 3 of this invention to a smart phone (electronic device). It is a schematic diagram which shows the structure of the electrode of the electric power transmission system which concerns on Embodiment 4 of this invention. It is a schematic diagram which shows the state which mounted | wore the smart phone (electronic device) in the case of transmitting electric power to a separate smart phone (electronic device) for every two active electrodes. It is a schematic diagram which shows the state which inserts a power receiving apparatus in a power transmission apparatus at the time of arrange | positioning an active electrode helically.

  Hereinafter, a power transmission system according to an embodiment of the present invention will be specifically described with reference to the drawings. The following embodiments do not limit the invention described in the claims, and all combinations of characteristic items described in the embodiments are essential to the solution. It goes without saying that it is not limited.

(Embodiment 1)
FIG. 1 is an equivalent circuit diagram schematically showing the configuration of the power transmission system according to Embodiment 1 of the present invention. As shown in FIG. 1, the power transmission device 1 of the power transmission system according to the first embodiment includes a power transmission module 10 having at least a voltage generation circuit 12 and a step-up transformer 13, and a coupling electrode 11. In the equivalent circuit of FIG. 1, an AC voltage having a frequency of 10 kHz to 10 MHz generated by the voltage generation circuit 12 is boosted by the step-up transformer 13, the active electrode (first active electrode) 11a becomes a high voltage, and the passive electrode (first The passive electrode 11p becomes a low voltage.

  The power receiving device 2 includes a power receiving module 20 having at least a step-down transformer 23 and a coupling electrode 21. In the equivalent circuit of FIG. 1, the capacitor CG is a capacitor between the active electrode (first active electrode) 11 a and the passive electrode (first passive electrode) 11 p of the power transmission device 1. The capacitance CL is a capacitance between the active electrode (second active electrode) 21a and the passive electrode (second passive electrode) 21p of the power receiving device 2. The capacitance CM corresponds to the capacitance between the active electrode (first active electrode) 11a of the power transmitting device 1 and the active electrode (second active electrode) 21a of the power receiving device 2. In FIG. 1, the resonance circuit is also included, but this is for improving the stability of power transmission, and the resonance circuit is not necessarily required.

  FIG. 2 is a schematic diagram showing a configuration of the power transmission system according to Embodiment 1 of the present invention. The power transmission device 1 shown in FIG. 2 boosts the power supplied from the commercial power supply 15 by the step-up transformer 13 via the primary rectification smoothing circuit 14. The step-up transformer 13 is connected to the first active electrode 11a and the first passive electrode 11p.

  In the power receiving device 2, the second active electrode 21a and the second passive electrode 21p are connected to the step-down transformer 23, and step down the transmitted power. And it is connected to the action part 27 which acts outside via the high frequency load circuit 22.

  For example, when the action part 27 is a toothbrush part of an electric toothbrush, the high frequency load circuit 22 rectifies by the rectifier circuit 24, stores in the secondary battery 25, and rotates the motor 26. Thereby, even if it is a case where it uses around water, a housing | casing can be sealed so that the permeation of the water to the inside of an apparatus may be prevented.

  Of course, the power transmission device also includes a second secondary battery (not shown) and a second rectifier circuit (not shown), and the first output terminal and the second output terminal of the second rectifier circuit. Are connected to the second secondary battery, the first input terminal is connected to the third passive electrode (not shown) of the power transmission device 1, and the second input terminal is connected to the third active electrode (see FIG. (Not shown) may be connected to each other. As described above, the commercial power supply 15 and the primary rectifying / smoothing circuit 14 in FIG. 1 are replaced with the second secondary battery (not shown), the second rectifying circuit (not shown), and the third passive electrode of the power transmission device 1. (Not shown), by replacing with a third active electrode (not shown), the casing of the power transmission device 1 can be completely sealed, and even when it is used for equipment used around water, power transmission It is possible to completely block the water intrusion path to the device 1 and to ensure waterproofness. The second secondary battery (not shown) is separately contactlessly charged via a third passive electrode (not shown) and a third active electrode (not shown).

  The power transmission device 1 includes a columnar columnar portion 101 and a cylindrical first tubular portion 102 that surrounds the columnar portion 101, and the power receiving device 2 is provided between the columnar portion 101 and the first tubular portion 102. A cylindrical second tubular portion 201 that can be attached to the housing is provided.

  The first active electrode 11a is formed along the vicinity of the outer surface of the columnar portion 101, and the second active electrode 21a is formed along the vicinity of the inner surface of the second cylindrical portion 201 so as to face each other. The first passive electrode 11p is formed along the vicinity of the inner surface of the first cylindrical portion 102, and the second passive electrode 21p is formed along the vicinity of the outer surface of the second cylindrical portion 201 so as to face each other. It is. The second passive electrode 21p of the power receiving device 2 and the first passive electrode 11p of the power transmitting device 1 surround the first active electrode 11a of the power transmitting device 1 and the second active electrode 21a of the power receiving device 2. It is arranged.

  Around the first active electrode 11a of the power transmission device 1 having a high potential and the second active electrode 21a of the power reception device 2, the second passive electrode 21p of the power reception device 2 and the first of the power transmission device 1 having a low potential are provided. Therefore, unnecessary electric field can be prevented from leaking to the surroundings.

  FIG. 3 is a perspective view schematically showing an arrangement configuration of active electrodes and passive electrodes of the power transmission system according to Embodiment 1 of the present invention. As shown in FIG. 3, the power transmission device 1 includes the first active electrode 11 a along the vicinity of the outer surface of the columnar columnar portion 101 and the vicinity of the inner surface of the cylindrical first cylindrical portion 102. A first passive electrode 11p is arranged. In addition, the power receiving device 2 arranges the second passive electrode 21p along the vicinity of the outer surface of the cylindrical second cylindrical portion 201, and the second passive electrode 21p along the vicinity of the inner surface of the second cylindrical portion 201. Active electrode 21a is arranged.

  By inserting the power receiving device 2 into the power transmitting device 1 in the direction of the arrow shown in FIG. 3, the first active electrode 11a of the power transmitting device 1 and the second active electrode 21a of the power receiving device 2 face each other, and the power transmitting device 1 The first passive electrode 11p and the second passive electrode 21p of the power receiving device 2 face each other and can be coupled by electric field. Moreover, the first active electrode 11a of the power transmission device 1 and the second active electrode 21a of the power reception device 2 are surrounded by the first passive electrode 11p of the power transmission device 1 and / or the second passive electrode 21p of the power reception device 2. Therefore, it is possible to prevent an unnecessary electric field from leaking to the surroundings.

  In Embodiment 1 described above, the power transmission device 1 includes the columnar columnar portion 101 and the cylindrical first cylindrical portion 102 surrounding the columnar portion 101, and the power receiving device 2 includes the columnar portion 101. The cylindrical second cylindrical part 201 that can be mounted between the first cylindrical part 102 and the first cylindrical part 102 is provided. Conversely, the power receiving device 2 includes a columnar columnar part and a columnar part. A cylindrical first cylindrical part that surrounds the part, and the power transmission device 1 includes a cylindrical second cylindrical part that can be mounted between the columnar part and the first cylindrical part. You may prepare.

  Also, the first active electrode 11a is disposed along the vicinity of the outer surface of the columnar section 101, and the second active electrode 21a is disposed along the vicinity of the inner surface of the second cylindrical section 201 so as to face each other. There is a first passive electrode 11p along the vicinity of the inner surface of the first cylindrical portion 102 and a second passive electrode 21p along the vicinity of the outer surface of the second cylindrical portion 201 so as to face each other. However, the first passive electrode 11p of the power transmission device 1 and the second passive electrode 21p of the power reception device 2 can be opposed to each other and can be electrically coupled to each other. Especially if it can arrange | position so that the 1st active electrode 11a of the power transmission apparatus 1 and the 2nd active electrode 21a of the power receiving apparatus 2 may be enclosed by the passive electrode 11p and / or the 2nd passive electrode 21p of the power receiving apparatus 2. It is not limited.

  As described above, according to the first embodiment, the second passive electrode 21p of the power receiving device 2 and the first passive electrode 11p of the power transmitting device 1 that are at a relatively low potential when mounted on the power transmitting device 1 are used. Since at least one of the first active electrode 11a of the power transmitting device 1 and the second active electrode 21a of the power receiving device 2 which are at a relatively high potential is disposed so as to surround, an unnecessary electric field leaks to the surroundings. This can be prevented in advance.

  In the first embodiment described above, the columnar portion 101 has a columnar shape, and the first tubular portion 102 and the second tubular portion 201 have a cylindrical shape, and thus the power receiving device 2 is attached to the power transmitting device 1. In this state, the power receiving device 2 can be rotated with respect to the power transmitting device 1. However, it is not particularly limited to such a shape, and the cross-sectional shape of the columnar portion 101 may be a polygon such as a triangle or a quadrangle, or may be a polygonal frustum shape having a taper.

  Although not shown, the bottom surface side of the first passive electrode 11p of the power transmission device 1 and the top surface side of the second passive electrode 21p of the power reception device 2 are respectively closed by other passive electrodes. It is preferable. By completely covering the bottom surface side of the first passive electrode 11p of the power transmission device 1 and the top surface side of the second passive electrode 21p of the power reception device 2 with other passive electrodes, leakage of unnecessary electric fields to the surroundings Can be more reliably prevented.

(Embodiment 2)
FIG. 4 is a schematic diagram showing the configuration of the power transmission system according to Embodiment 2 of the present invention. FIG. 4 (a) is a side sectional view schematically showing the configuration of the power transmission system according to the second embodiment of the present invention, and FIG. 4 (b) is a power transmission according to the second embodiment of the present invention. It is a front view which shows the structure of a system typically. The second embodiment is different from the first embodiment in that a power receiving jacket 2 a on which an electronic device is mounted is used as the power receiving device 2.

  As shown in FIG. 4, the power transmission device 1 includes a columnar portion 101 and a first cylindrical portion 102 that surrounds the columnar portion 101, and the power receiving jacket 2 a includes a columnar portion 101 and a first cylindrical portion 102. A second cylindrical portion 201 that can be mounted in between is provided. The electronic device 30 to be charged and the power receiving jacket 2a are connected via the connector 41, and the power supplied from the power transmission device 1 is a secondary battery in the electronic device 30 via the connector 41. Charge (not shown).

  The first active electrode 11a is disposed along the vicinity of the outer surface of the columnar portion 101, and the second active electrode 21a is disposed along the vicinity of the inner surface of the second tubular portion 201 so as to face each other. The first passive electrode 11p is disposed along the vicinity of the inner surface of the first tubular portion 102, and the second passive electrode 21p is disposed along the vicinity of the outer surface of the second tubular portion 201 so as to face each other. It is. The second passive electrode 21p of the power receiving jacket 2a and the first passive electrode 11p of the power transmitting device 1 surround the first active electrode 11a of the power transmitting device 1 and the second active electrode 21a of the power receiving device 2. It is arranged.

  Around the first active electrode 11a of the power transmission device 1 having a high potential and the second active electrode 21a of the power reception device 2, the second passive electrode 21p of the power receiving jacket 2a having the low potential and the first of the power transmission device 1 are arranged. Since it is surrounded by the passive electrode 11p, it is possible to prevent an unnecessary electric field from leaking to the surroundings and transmit power with high transmission efficiency.

  FIG. 5 is a schematic cross-sectional view showing the positional relationship of the electrodes of the power transmission system according to Embodiment 2 of the present invention. FIG. 5 is a cross-sectional view in a plane orthogonal to the height direction of the columnar portion 101.

  As shown in FIG. 5, the first active electrode 11a provided along the vicinity of the outer surface of the columnar portion 101 is provided along the vicinity of the inner surface of the second cylindrical portion 201 via a gap. Opposite the second active electrode 21a. The second passive electrode 21p provided along the vicinity of the outer surface of the second cylindrical portion 201 is provided along the vicinity of the inner surface of the first cylindrical portion 102 via the gap. It faces the passive electrode 11p. Since the first active electrode 11a and the second active electrode 21a having a high potential are surrounded by the second passive electrode 21p and the first passive electrode 11p having a low potential, an unnecessary electric field is passively generated. There is almost no risk of leaking beyond the electrodes.

  As described above, according to the second embodiment, at least one of the second passive electrode 21p of the power receiving jacket 2a having a relatively low potential and the first passive electrode 11p of the power transmission device 1 is relatively high. Since it is arranged so as to surround the first active electrode 11a of the power transmission device 1 having the potential and the second active electrode 21a of the power receiving jacket 2a, it is possible to prevent an unnecessary electric field from leaking to the surroundings. be able to. Therefore, it is possible to transmit power with high transmission efficiency.

(Embodiment 3)
FIG. 6 is a schematic diagram showing the configuration of the electrodes of the power transmission system according to Embodiment 3 of the present invention. The third embodiment is different from the first and second embodiments in that two active electrodes are provided on the power transmitting device 1 and the power receiving device 2, respectively.

  As shown in FIG. 6, the power transmission device 1 includes two active electrodes, that is, a first active electrode 11 a 1 and an adjacent third active electrode 11 a 2, and the power receiving device 2 also includes two active electrodes, that is, the first active electrode 11 a 1. The second active electrode 21a1 and the fourth active electrode 21a2 are provided. Two active electrodes are provided because one active electrode can be used for power transmission and the other active electrode can be used for data communication.

  The first active electrode 11a1, the third active electrode 11a2, the second active electrode 21a1, and the fourth active electrode 21a2 are the first passive electrode 11p of the power transmitting device 1 and the second passive electrode of the power receiving device 2. It is surrounded by the electrode 21p. Therefore, it is possible to prevent an unnecessary electric field from leaking to the surroundings.

  FIG. 7 is a schematic diagram illustrating a configuration of the power receiving jacket 2a when the power transmission system according to the third embodiment of the present invention is applied to a smartphone (electronic device). As shown in the perspective view of FIG. 7B, the smartphone (electronic device) 30 can be attached to the power receiving jacket 2 a that can be inserted into the power transmission device 1.

  7A shows the electrode arrangement of the power receiving jacket 2a. The power receiving jacket 2a is provided with a second passive electrode 21p on the housing. Thereby, it can prevent beforehand that an unnecessary electric field leaks to the circumference | surroundings in the state inserted in the power transmission apparatus 1. FIG.

  The power receiving jacket 2a includes two active electrodes, a second active electrode 21a1 and a fourth active electrode 21a2. The second active electrode 21a1 is used for power transmission, and the fourth active electrode 21a2 is used. Is used for data communication.

  FIG. 8 is a perspective view schematically showing a configuration of power transmission device 1 when the power transmission system according to Embodiment 3 of the present invention is applied to smartphone (electronic device) 30. As shown in FIG. 8 (a), the power transmission device 1 includes the first active electrode 11a1 and the third active electrode 11a1 so as to be wound around the outer surface of the columnar portion 101 in accordance with the positions of the two active electrodes of the power receiving jacket 2a. Active electrode 11a2. The first active electrode 11a1 is used for power transmission, and the third active electrode 11a2 is used for data communication. The first passive electrode 11p is formed on the surface and bottom surface of the first cylindrical portion 102.

  Of course, you may cover the 1st cylindrical part 102 whole with the 1st passive electrode 11p of the power transmission apparatus 1. FIG. For example, as shown in FIG. 8B, the smartphone 30 is a cup-shaped conductor 81 connected to the first passive electrode 11 p formed on the surface and bottom surface of the first cylindrical portion 102. What is necessary is just to cover the power receiving jacket 2a to which is attached in a state where the power receiving jacket 2a is inserted into the power transmitting device 1. By doing in this way, the cup-shaped conductor 81 functions as a passive electrode of the power transmission device 1, and it is possible to reliably prevent an unnecessary electric field from leaking to the surroundings.

  As described above, according to the third embodiment, two active electrodes are provided, and one is used for power transmission and the other is used for data communication, thereby transmitting power with stable and high transmission efficiency. In addition, data communication can be performed without degrading data quality.

(Embodiment 4)
FIG. 9 is a schematic diagram showing the configuration of the electrodes of the power transmission system according to Embodiment 4 of the present invention. FIG. 9 (a) is a front view schematically showing the configuration of the electrode of the power transmission system according to Embodiment 4 of the present invention, and FIG. 9 (b) is the power according to Embodiment 4 of the present invention. It is the elements on larger scale which show typically the composition of the electrode of a transmission system. The fourth embodiment is different from the first to third embodiments in that a high dielectric constant layer is provided on the surface of the passive electrode of the power transmitting device 1, the power receiving device 2, or the passive electrode of the power receiving jacket 2a.

  In the fourth embodiment, a ceramic plate made of barium titanate having a high dielectric constant is bonded and laminated on the surface of the first passive electrode 11p provided on the columnar portion 101 of the power transmission device 1 as the high dielectric constant layer 91. . Then, a high dielectric constant layer 92 having the same configuration is adhesively laminated on the surface of the second passive electrode 21p provided on the second cylindrical portion 201 of the power receiving jacket 2a. An epoxy resin layer mixed with barium titanate powder may be used as the high dielectric constant layer. Further, a sheet made of a metal oxide material having a high dielectric constant, a polymer material, or the like may be used. If the relative permittivity of the high dielectric constant layer is 7 or more, the first passive electrode is compared with the case where a resin layer made of an epoxy resin is formed on the surfaces of the first passive electrode 11p and the second passive electrode 21p. The capacitive coupling between 11p and the second passive electrode 21p can be strengthened.

  By providing the high dielectric constant layers 91 and 92 on the surface of the passive electrode, the capacitance between the first passive electrode 11p of the power transmission device 1 and the second passive electrode 21p of the power receiving jacket 2a is the same as that of the power transmission device 1. The capacity between the one active electrode 11a and the second active electrode 21a of the power receiving device 2 can be made larger, and power can be transmitted with high transmission efficiency.

  In particular, the capacitance between the first passive electrode 11p of the power transmission device 1 and the second passive electrode 21p of the power reception jacket 2a is such that the first active electrode 11a of the power transmission device 1 and the second active electrode of the power reception jacket 2a. When the capacity with respect to 21a is twice or more, the power can be transmitted more reliably with high transmission efficiency. Therefore, the area where both electrodes face each other and the distance between both electrodes are adjusted so as to be twice or more, and the high dielectric constant layers 91 and 92 are stacked as in the fourth embodiment, thereby reducing the power consumption. Transmission efficiency can be increased.

  As described above, according to the fourth embodiment, the high dielectric constant layer 91 is provided on the surface of the first passive electrode 11p of the power transmission device 1 and the surface of the second passive electrode 21p of the power reception device 2 or the power reception jacket 2a. By providing the high dielectric constant layer 92, the capacitance between the first passive electrode 11 p of the power transmission device 1 and the second passive electrode 21 p of the power reception device 2 or the power reception jacket 2 a is increased. Adjustment can be made so that the capacitance between the electrode 11a and the second active electrode 21a of the power receiving device 2 or the power receiving jacket 2a is at least twice, and power can be transmitted with high transmission efficiency.

  In addition, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications and substitutions are possible within the scope of the gist of the present invention. For example, in Embodiment 3, a configuration in which two active electrodes are provided in each of the power transmitting device 1 and the power receiving device 2 is described. In this case, power is supplied to separate electronic devices for each of the two active electrodes. It may be transmitted. FIG. 10 is a schematic diagram illustrating a state in which the smartphone 30 is mounted when power is transmitted to separate smartphones (electronic devices) 30 for each of the two active electrodes.

  In FIG. 10, the power receiving jacket 2a is formed as a hollow cylindrical body. Then, the power receiving jacket 2a on which the first smartphone 30 is mounted is inserted into the upright columnar portion 101 of the power transmission device 1 from above.

  Next, the power receiving jacket 2a to which the second smartphone 30 is attached is inserted from above with the movable stopper 71 interposed therebetween. By doing in this way, as shown to Fig.10 (a), (b), the two smart phones 30 installed vertically can be charged simultaneously.

  Of course, the power receiving jacket is not limited to the vertical placement, and for example, as shown in FIG. 10C, two columnar portions 101 are provided in the horizontal direction of the power transmission device 1 and the smartphone 30 is attached to each of them. 2a may be inserted from above. By doing in this way, it becomes possible to charge the smart phone 30 as many as the number of the columnar parts 101 simultaneously.

  In the third embodiment, a configuration in which two active electrodes are provided in each of the power transmitting device 1 and the power receiving device 2 is described. However, the configuration is not limited to two, and a plurality of active electrodes may be used. One active electrode may be arranged in a spiral. FIG. 11 is a schematic diagram illustrating a state where the power receiving device 2 is inserted into the power transmitting device 1 when the active electrodes are arranged in a spiral shape.

  As shown in FIG. 11, the first active electrode 11 a is spirally provided on the surface of the columnar portion 101 of the power transmission device 1, and the inner surface of the second cylindrical portion 201 of the power receiving device 2 has the same shape. In addition, the second active electrode 21a is provided in a spiral shape. Accordingly, the power receiving device 2 can be rotated in a state where the power receiving device 2 is inserted into the power transmitting device 1 and stopped at a position where the power transmission efficiency is highest. Therefore, power can be transmitted with high efficiency.

DESCRIPTION OF SYMBOLS 1 Power transmission apparatus 2 Power receiving apparatus 2a Power receiving jacket 10 Power transmission module 11 Coupling electrode 11a Active electrode (1st active electrode)
11p passive electrode (first passive electrode)
12 voltage generation circuit 13 step-up transformer 20 power receiving module 21 coupling electrode 21a active electrode (second active electrode)
21p passive electrode (second passive electrode)
22 high frequency load circuit 101 columnar part 102 first cylindrical part 201 second cylindrical part

Claims (9)

A power transmission device having a first passive electrode, a first active electrode, and a voltage generating circuit connected between the first passive electrode and the first active electrode;
A second passive electrode opposed to the first passive electrode via a gap when mounted on the power transmission device; and a second active electrode opposed to the first active electrode via a gap. A power transmission system comprising:
At least one of the second passive electrode of the power receiving device and the first passive electrode of the power transmitting device is around the first active electrode of the power transmitting device and the second active electrode of the power receiving device. An electric power transmission system arranged so as to surround. The power transmission device or the power receiving device includes a columnar portion and a first cylindrical portion surrounding the columnar portion,
The first active electrode or the second active electrode is formed along the vicinity of the outer surface of the columnar part,
The first passive electrode or the second passive electrode is formed along the vicinity of the inner surface of the first cylindrical portion,
The power receiving device or the power transmitting device includes a second cylindrical portion,
A second active electrode or a first active electrode is formed along the vicinity of the inner surface of the second cylindrical portion,
2. The power transmission system according to claim 1, wherein a second passive electrode or a first passive electrode is formed along the vicinity of the outer surface of the second cylindrical portion.   The capacitance between the first passive electrode of the power transmitting device and the second passive electrode of the power receiving device is the first active electrode of the power transmitting device and the second active electrode of the power receiving device. The power transmission system according to claim 1, wherein the electrode is disposed so as to be larger than a capacity between the electrode and the electrode.   The capacitance between the first passive electrode of the power transmitting device and the second passive electrode of the power receiving device is the first active electrode of the power transmitting device and the second active electrode of the power receiving device. The power transmission system according to claim 3, wherein the electrode is disposed so as to be at least twice the capacity between the electrode and the electrode.   The bottom surface side of the first passive electrode of the power transmission device and the top surface side of the second passive electrode of the power reception device are respectively closed by other passive electrodes. 5. The power transmission system according to claim 4. A third active electrode adjacent to the first active electrode of the power transmitting device; and a fourth active electrode adjacent to the second active electrode of the power receiving device;
The second passive electrode of the power receiving device and the first passive electrode of the power transmitting device are the first active electrode and the third active electrode of the power transmitting device, and the second of the power receiving device. The power transmission system according to claim 1, wherein the power transmission system is arranged so as to surround the periphery of the active electrode and the fourth active electrode.   The surface where the first active electrode of the power transmission device and the second active electrode of the power reception device face each other, and the first passive electrode of the power transmission device and the second passive electrode of the power reception device The power transmission system according to any one of claims 1 to 6, wherein the surfaces facing each other have a waterproof structure. The power transmission device includes a secondary battery and a rectifier circuit,
The first output terminal and the second output terminal of the rectifier circuit are connected to the secondary battery, the first input terminal is connected to the first passive electrode of the power transmission device, and the second input terminal The power transmission system according to claim 1, wherein the power transmission system is connected to the first active electrode of the power transmission device.   The power transmission system according to any one of claims 2 to 8, wherein the columnar part has a columnar shape, and the first cylindrical part and the second cylindrical part have a cylindrical shape. .

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