WO2013051501A1 - Power transmission system and power transmitting device - Google Patents

Power transmission system and power transmitting device Download PDF

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Publication number
WO2013051501A1
WO2013051501A1 PCT/JP2012/075362 JP2012075362W WO2013051501A1 WO 2013051501 A1 WO2013051501 A1 WO 2013051501A1 JP 2012075362 W JP2012075362 W JP 2012075362W WO 2013051501 A1 WO2013051501 A1 WO 2013051501A1
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WO
WIPO (PCT)
Prior art keywords
electrode
power
passive electrode
power transmission
receiving device
Prior art date
Application number
PCT/JP2012/075362
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French (fr)
Japanese (ja)
Inventor
篠田　悟史
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株式会社村田製作所
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Priority to JP2013537497A priority Critical patent/JP5742955B2/en
Publication of WO2013051501A1 publication Critical patent/WO2013051501A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/05—Circuit arrangements or systems for wireless supply or distribution of electric power using capacitive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices

Definitions

  • the present invention relates to a power transmission system and a power transmission device that transmit power without being physically connected.
  • 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).
  • the coil module 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.
  • Patent Document 1 discloses a device that transmits electric power by forming a strong electric field between an active electrode on a power transmission device side and an active electrode on a power reception device side.
  • FIG. 9 is a schematic diagram showing a configuration of a power transmission system that forms a conventional electric field and transmits power.
  • a voltage generating circuit 12 is provided between the active electrode 11a and the passive electrode 11p of the power transmission device 1, and a load circuit 22 is provided between the active electrode 21a and the passive electrode 21p of the power receiving device 2. is there.
  • An electrostatic field 6 is formed between the active electrode 11 a of the power transmission device 1 and the active electrode 21 a of the power reception device 2, and power is transmitted via the electrostatic field 6. Since an electrostatic field is used, it is not necessary to control the relative positions of the active electrodes 11a and 21a in the planar direction with high accuracy, and the degree of freedom in designing the shape of the coupling electrode is high.
  • FIG. 10 is an equivalent circuit diagram of a conventional power transmission system.
  • a power transmission device 1 of a conventional power transmission system 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.
  • 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 electrode) 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.
  • the capacitor CG is a capacitor between the active electrode 11 a and the 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 11a of the power transmission device 1 and the active electrode 21a of the power reception device 2.
  • the resonance circuit is also included, but this is for increasing the stability of power transmission, and the resonance circuit is not necessarily required.
  • the passive electrode 11p of the power transmission device 1 and the passive electrode 21p of the power reception device 2 are separated, and the coupling capacity between the passive electrodes 11p and 21p is increased to perform stable power transmission. Therefore, the size (area) of the passive electrode 11p of the power transmitting device 1 and the passive electrode 21p of the power receiving device 2 is increased.
  • the chargeable area is increased, or when the size of the active electrode 11a of the power transmission device 1 is increased so that the plurality of power receiving devices 2 can be charged simultaneously, it is necessary to further increase the size of the passive electrodes 11p and 21p.
  • Patent Document 2 when the power receiving device 2 is attached to the power transmitting device 1, the active electrode 11a of the power transmitting device 1, the active electrode 21a of the power receiving device 2, the power receiving device The second passive electrode 21p and the passive electrode 11p of the power transmission device 1 are arranged in this order.
  • Patent Document 2 can be applied only to the card-shaped power receiving device 2 and has a problem that the shape of the power receiving device 2 is limited.
  • the present invention has been made in view of the above circumstances, and can improve the power transmission efficiency by increasing the coupling capacitance between the passive electrodes, and can prevent the leakage of unnecessary electric fields to the surroundings.
  • An object is to provide a power transmission device.
  • a power transmission system includes a first passive electrode, a first active electrode having a higher potential than the first passive electrode, and the first passive electrode and the first passive electrode.
  • a power transmission device including a voltage generating circuit connected between the active electrode and a second passive electrode, and a second active electrode having a higher potential than the second passive electrode, and is attached to the power transmission device
  • a power transmission system including a power receiving device capable of performing the first active electrode of the power transmitting device and the second active electrode of the power receiving device when the power receiving device is attached to the power transmitting device.
  • the first passive electrode of the power transmission device is disposed so as to cover the second passive electrode of the power receiving device.
  • the first power electrode of the power transmission device is covered so as to cover the first active electrode of the power transmission device, the second active electrode of the power reception device, and the second passive electrode of the power reception device.
  • the size of the first passive electrode can be increased, so that the coupling capacitance between the first passive electrode and the second passive electrode can be increased, and the power The transmission efficiency can be increased. Further, unnecessary electric field leakage to the surroundings can be prevented.
  • the power transmission device includes a pedestal portion on which the power reception device is placed, and a housing that houses the power reception device in a state of being placed on the pedestal portion. It is preferable that the second active electrode is provided on the surface of the pedestal portion, and the first passive electrode is provided on a part or all of the inner surface of the housing.
  • the second active electrode is provided on the surface to be placed on the pedestal portion of the power receiving device
  • the first passive electrode is provided on a part or all of the inner surface of the housing.
  • a part or all of the casing is made of a transparent material.
  • a blade-like third passive electrode and / or a belt-like fourth passive electrode may be provided connected to the first passive electrode of the power transmission device. preferable.
  • the third passive electrode and / or the fourth passive electrode in the form of a strip are connected to the first passive electrode of the power transmission device, so the third passive electrode and / or the second passive electrode is provided.
  • the first passive electrode of the power transmission device and the second passive electrode of the power receiving device are brought close to each other.
  • the coupling capacitance between the electrode and the second passive electrode can be increased, and the power transmission efficiency can be increased.
  • a power transmission device has a capacity between a second passive electrode and a power reception device including a second active electrode having a higher potential than the second passive electrode.
  • a power transmission device coupled to transmit power to the power receiving device, the first passive electrode, a first active electrode having a higher potential than the first passive electrode, and the first passive electrode and the first A voltage generating circuit connected to one active electrode, and when the power receiving device is mounted, the first active electrode, the second active electrode of the power receiving device, and the power receiving device
  • the first passive electrode is arranged so as to cover the second passive electrode.
  • the first passive electrode when the power receiving device is attached, the first passive electrode is disposed so as to cover the first active electrode, the second active electrode of the power receiving device, and the second passive electrode of the power receiving device. Since the size of the first passive electrode can be increased, the coupling capacitance between the first passive electrode and the second passive electrode can be increased, and the power transmission efficiency can be increased. It becomes. In addition, power can be reliably transmitted regardless of the shape of the power receiving device, and unnecessary electric field leakage to the surroundings can be prevented.
  • the first active electrode of the power transmission device when the power reception device is attached to the power transmission device, the first active electrode of the power transmission device, the second active electrode of the power reception device, and the second passive electrode of the power reception device.
  • the size of the first passive electrode can be increased, so that the coupling capacitance between the first passive electrode and the second passive electrode
  • the power transmission efficiency can be increased. Further, unnecessary electric field leakage to the surroundings can be prevented.
  • FIG. 1 is a schematic diagram showing a configuration of a power transmission system according to Embodiment 1 of the present invention.
  • the power receiving device 2 of the power transmission system includes a second active electrode 21a and a second passive electrode 21p with a load circuit 22 interposed therebetween.
  • the second active electrode 21a of the power receiving device 2 is opposed to the first active electrode 11a of the power transmitting device 1 via a gap, and forms an electric field 18 and is capacitively coupled.
  • the size of the gap between the second active electrode 21a of the power receiving device 2 and the first active electrode 11a of the power transmitting device 1 is the sum of the thicknesses of the insulating films provided on the surfaces of the active electrodes 11a and 21a.
  • the first active electrode 11a of the power transmission device 1 has a higher charge density than the first passive electrode 11p, so the electric field 18 in the air gap becomes stronger.
  • the first passive electrode 11 p of the power transmission device 1 is provided on the entire inner surface of the housing 25 that houses the power reception device 2. Therefore, the second passive electrode 21p of the power receiving device 2 is opposed to a part of the first passive electrode 11p provided on the entire inner surface of the housing 25 with a relatively large distance, and therefore a relatively weak electric field. 19 is formed and capacitively coupled.
  • the size of the second passive electrode 21p of the power receiving device 2 can be made larger than the size of the second active electrode 21a and the size of the first passive electrode 11p can be increased, the first passive electrode 11p And the second passive electrode 21p can be increased in coupling capacitance. Therefore, it is possible to increase the power transmission efficiency.
  • FIG. 2 is a transparent perspective view schematically showing the configuration of the power transmission system according to Embodiment 1 of the present invention when a pedestal portion on which the power receiving device 2 is placed is provided.
  • a pedestal portion 41 on which the power receiving device 2 is placed is provided below the housing 25.
  • a first active electrode 11 a is provided on the top surface of the pedestal portion 41
  • a first passive electrode 11 p is provided on the top and bottom surfaces of the housing 25.
  • the first passive electrode 11p is provided on the top surface and the bottom surface of the housing 25.
  • the power receiving device 2 is placed on the pedestal portion 41 so that the second active electrode 21a faces the first active electrode 11a provided on the top surface of the pedestal portion 41. As a result, the second active electrode 21a and the first active electrode 11a are capacitively coupled. On the other hand, the second passive electrode 21p of the power receiving device 2 is capacitively coupled to the first passive electrode 11p provided on the top surface of the housing 25.
  • the first active electrode 11a of the power transmitting device 1 when the power receiving device 2 is attached to the power transmitting device 1, the first active electrode 11a of the power transmitting device 1, the second active electrode 21a of the power receiving device 2, and the power receiving device. Since the size of the first passive electrode 11p can be increased by arranging the first passive electrode 11p of the power transmission device 1 so as to cover the second passive electrode 21p, the second passive electrode It is possible to increase the coupling capacity between the power source 21p and the power transmission efficiency. It is also possible to prevent unnecessary electric field leakage to the surroundings.
  • FIG. 3 is a transparent perspective view schematically showing the configuration of the power transmission system according to Embodiment 2 of the present invention.
  • a pedestal portion 41 on which the power receiving device 2 is placed is provided below the housing 25, and the first active electrode 11 a is provided on the top surface of the pedestal portion 41.
  • a first passive electrode 11p is provided on the top and bottom surfaces of the casing 25.
  • the first passive electrode 11p is provided on the top surface and the bottom surface of the housing 25.
  • the power receiving device 2 may be placed anywhere on the pedestal portion 41, and a plurality of power receiving devices 2 may be placed on the pedestal portion 41.
  • the power receiving device 2 is placed on the pedestal portion 41 so that the second active electrode 21 a faces the first active electrode 11 a provided on the top surface of the pedestal portion 41.
  • the second active electrode 21a and the first active electrode 11a are capacitively coupled.
  • the second passive electrode 21p of the power receiving device 2 is capacitively coupled to the first passive electrode 11p provided on the top surface of the housing 25.
  • the casing 25 is made of a transparent material
  • the first passive electrode 11p provided on the top and bottom surfaces is formed of a transparent electrode such as ITO (indium tin oxide), and the casing 25 and the first passive electrode 11p are formed.
  • ITO indium tin oxide
  • the power receiving device 2 placed inside the housing 25 the charge state display provided in the power receiving device 2, and the like can be viewed from the outside.
  • the power receiving device 2 is placed, what kind of the power receiving device 2 is placed, to what extent the charging has progressed, etc. can be visually recognized from the outside.
  • it is not limited to comprising all of a transparent material, and a part of the material may be transparent.
  • FIG. 4 is a schematic diagram showing a configuration of the power transmission system according to Embodiment 2 of the present invention when the housing 25 has a lid.
  • 4A is a perspective view showing a configuration when the housing 25 has the lid portion 61
  • FIG. 4B shows a cross-sectional view showing a configuration when the housing 25 has the lid portion 61. ing.
  • the base portion 41 and the lid portion 61 are connected via a hinge 62 to constitute a housing 25.
  • the power receiving device 2 is placed on the pedestal portion 41, power is transmitted by closing the lid portion 61.
  • the power receiving device 2 is configured so that the first active electrode 11 a and the second active electrode 21 a provided on the top surface side of the pedestal portion 41 face each other. 41. Then, the power receiving device 2 can be accommodated in the housing 25 by rotating the lid portion 61 with the hinge 62 and covering the lid portion 41. Then, the first passive electrode 11p provided on the entire inner surface of the lid 61 and the second passive electrode 21p of the power receiving device 2 can be capacitively coupled to transmit power efficiently.
  • power transmission may be started when the lid 61 is closed.
  • a switch connected to the voltage generation circuit 12 may be provided so that the switch is turned on and energized when the lid 61 comes into contact with the pedestal 41.
  • FIG. 5 is a schematic diagram showing another configuration of the power transmission system according to Embodiment 2 of the present invention.
  • one surface of the housing 25 may be constituted by a door portion 71 that opens and closes like a door.
  • the first passive electrode 11p is provided on the inner surface of the door portion 71, the door portion 71 is opened, the power receiving device 2 is placed, and power transmission is started when the door portion 71 is closed.
  • a part of the housing 25 may be constituted by a drawer portion 72.
  • the first passive electrode 11p is provided on the inner surface side of the lead portion 72, the lead portion 72 is pulled out, the power receiving device 2 is placed, and transmission of power is started when the lead portion 72 is pushed. .
  • the top surface of the casing 25 that is not a rectangular parallelepiped shape may be configured by a lid 73.
  • the first passive electrode 11p is provided on the inner surface of the lid 73, the lid 73 is opened, the power receiving device 2 is placed, and power transmission is started when the lid 73 is closed.
  • the first active electrode 11a of the power transmitting device 1 and the second active electrode 21a of the power receiving device 2 are used.
  • the size of the first passive electrode 11p can be increased.
  • the coupling capacitance between the one passive electrode 11p and the second passive electrode 21p can be increased, and the power transmission efficiency can be increased. It is also possible to prevent unnecessary electric field leakage to the surroundings.
  • power transmission may be requested from the power receiving apparatus 2, power transmission may be started when requested, and capacitive coupling may be disconnected when charging is completed. Furthermore, power may be transmitted only when the power receiving device 2 is placed.
  • a sensor that detects that the power receiving device 2 is placed on the pedestal portion 41 is provided, and when it is detected that the power receiving device 2 is placed, a switch connected to the voltage generation circuit 12 is turned on. When it is detected that the power is removed and the battery is removed, the switch connected to the voltage generation circuit 12 is turned off to end the charging.
  • the first passive electrode 11p is provided in a part or all of the housing 25, so It is also possible to prevent leakage of unnecessary electric field.
  • the third embodiment is different from the first and second embodiments in that a blade-like third passive electrode and / or a belt-like fourth passive electrode is provided connected to the first passive electrode 11p of the power transmission device 1. 2 is different.
  • FIG. 6 is a schematic diagram showing a configuration of the power transmission system according to the third embodiment of the present invention.
  • the power receiving device 2 of the power transmission system according to the third embodiment includes an active electrode (second active electrode) 21 a and a passive electrode (second passive electrode) across a load circuit 22. 21p.
  • the second active electrode 21a of the power receiving device 2 is opposed to the first active electrode 11a of the power transmitting device 1, and forms a strong electric field 18 and is capacitively coupled.
  • the first passive electrode 11 p of the power transmission device 1 is provided on the entire inner surface of the housing 25 that houses the power reception device 2.
  • a blade-like third passive electrode 81 is connected to the first passive electrode 11p.
  • the presence of the blade-like third passive electrode 81 is the same as bringing the first passive electrode 11p of the power transmitting device 1 close to the second passive electrode 21p of the power receiving device 2, and more easily the strong electric field 19 Can be formed and capacitive coupling can be performed, and the coupling capacity can be increased. Therefore, it is possible to increase the power transmission efficiency.
  • the third passive electrode 81 having a blade shape is made of metal foil, metal tape, carbon fiber, or the like, and the surface of the third passive electrode 81 connected to the first passive electrode 11p is insulation-coated. You can leave it.
  • FIG. 7 is a schematic diagram showing a configuration of the power transmission system according to Embodiment 3 of the present invention when a band-shaped fourth passive electrode is used in combination.
  • the blade-like third passive electrode 81 and the belt-like fourth passive electrode 91 are provided on the lid 61 that can be opened and closed via a hinge 62 and connected to the passive electrode 11p of the power transmission device 1. .
  • the lid portion 61 is closed, first, the band-like fourth passive electrode 91 is deformed along the shape of the power receiving device 2 placed on the pedestal portion 41 and is in close contact with the power receiving device 2.
  • the third passive electrode 81 in contact with the fourth passive electrode 91 in close contact with the power receiving device 2 is in contact with the fourth passive electrode 91. Therefore, the first passive electrode 11p of the power transmission device 1 and the second passive electrode 21p of the power reception device 2 are similar to each other, the coupling capacity can be increased, and the power transmission efficiency can be increased. It becomes possible.
  • the blade-like third passive electrode 81 and / or the belt-like fourth passive electrode 91 are connected to the first passive electrode 11p of the power transmission device 1 and provided. Therefore, by arranging the third passive electrode 81 and / or the fourth passive electrode 91 close to the second passive electrode 21p, the first passive electrode 11p of the power transmitting device 1 and the power receiving device 2 This is the same as bringing the second passive electrode 21p closer, and the coupling capacitance between the passive electrodes can be increased, and the power transmission efficiency can be improved.
  • 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 present invention.
  • the shape of the power receiving device 2 is not limited to a square shape, and may be, for example, a spherical shape or a cylindrical shape.
  • FIG. 8 is a schematic diagram showing a configuration of the power transmission system according to Embodiment 3 of the present invention when the power receiving device 2 has a cylindrical shape.
  • the cylindrical power receiving device 2 is provided with a pair of second active electrodes 21 a and 21 a at positions facing each other.
  • the one second active electrode 21a faces the first active electrode 11a of the pedestal 41, the one second active electrode 21a is capacitively coupled to the first active electrode 11a.
  • the other second active electrode 21a faces the first passive electrode 11p of the lid portion 61 and is capacitively coupled to the first passive electrode 11p.
  • Electric power can be transmitted from the power transmitting device 1 to the power receiving device 2 by causing a current to flow through the load circuit 22 due to a voltage having the same amplitude and opposite phase generated in the pair of second active electrodes 21a and 21a. .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

Provided is a power transmission system which has improved power transmission efficiency by increasing the coupling capacitance between passive electrodes and is capable of preventing unnecessary leakage of electric field to the surrounding area. This power transmission system is provided with: a power transmitting device (1) which is provided with a first passive electrode (11p), a first active electrode (11a) that is at a higher potential than the first passive electrode (11p), and a voltage generation circuit (12) that is connected between the first passive electrode (11p) and the first active electrode (11a); and a power receiving device (2) which is provided with a second passive electrode (21p) and a second active electrode (21a) that is at a higher potential than the second passive electrode (21p), said power receiving device (2) capable of being attached to the power transmitting device (1). In cases where the power receiving device (2) is attached to the power transmitting device (1), the first passive electrode (11p) of the power transmitting device (1) is arranged so as to cover the first active electrode (11a) of the power transmitting device (1), the second active electrode (21a) of the power receiving device (2) and the second passive electrode (21p) of the power receiving device (2).

Description

電力伝送システム及び送電装置Power transmission system and power transmission device
　本発明は、物理的に接続することなく電力を伝送する電力伝送システム及び送電装置に関する。 The present invention relates to a power transmission system and a power transmission device that transmit power without being physically connected.
　近年、非接触で電力を伝送する電子機器が多々開発されている。電子機器において非接触で電力を伝送するためには、電力の送電ユニットと、電力の受電ユニットとの双方にコイルモジュールを設けた磁界結合方式の電力伝送システムが採用されることが多い。 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, a magnetic field coupling type electric power transmission system in which coil modules are provided in both the electric power transmission unit and the electric power reception unit is often employed.
　しかし、磁界結合方式では、各コイルモジュールを通過する磁束の大きさが起電力に大きく影響され、電力を高い効率で伝送するためには、送電ユニット側（一次側）のコイルモジュールと受電ユニット側（二次側）のコイルモジュールとのコイル平面方向の相対位置の制御に高い精度が要求される。また、結合電極としてコイルモジュールを用いているので、送電ユニット及び受電ユニットの小型化が難しくなる。さらに、電子機器等では、コイルの発熱による蓄電池への影響を考慮する必要があり、これが配置設計上のボトルネックになるおそれがあるという問題もあった。 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. Furthermore, in an electronic device or the like, it is necessary to consider the influence on the storage battery due to the heat generated by the coil, which may cause a bottleneck in layout design.
　そこで、静電界を用いた電力伝送システムが多々開発されている。例えば特許文献１では、送電装置側の能動電極と受電装置側の能動電極との間で強い電場を形成して、電力を伝送する装置が開示されている。図９は、従来の電場を形成して電力を伝送する電力伝送システムの構成を示す模式図である。 Therefore, many power transmission systems using electrostatic fields have been developed. For example, Patent Document 1 discloses a device that transmits electric power by forming a strong electric field between an active electrode on a power transmission device side and an active electrode on a power reception device side. FIG. 9 is a schematic diagram showing a configuration of a power transmission system that forms a conventional electric field and transmits power.
　図９に示すように、送電装置１の能動電極１１ａと受動電極１１ｐとの間に電圧発生回路１２を設け、受電装置２の能動電極２１ａと受動電極２１ｐとの間に負荷回路２２を設けてある。送電装置１の能動電極１１ａと受電装置２の能動電極２１ａとの間に静電界６が形成され、静電界６を介して電力が伝送される。静電界を用いているので、能動電極１１ａ、２１ａの平面方向の相対位置を高い精度で制御する必要がなく、結合電極の形状設計の自由度が高い。 As shown in FIG. 9, a voltage generating circuit 12 is provided between the active electrode 11a and the passive electrode 11p of the power transmission device 1, and a load circuit 22 is provided between the active electrode 21a and the passive electrode 21p of the power receiving device 2. is there. An electrostatic field 6 is formed between the active electrode 11 a of the power transmission device 1 and the active electrode 21 a of the power reception device 2, and power is transmitted via the electrostatic field 6. Since an electrostatic field is used, it is not necessary to control the relative positions of the active electrodes 11a and 21a in the planar direction with high accuracy, and the degree of freedom in designing the shape of the coupling electrode is high.
　また、図１０は、従来の電力伝送システムの等価回路図である。図１０に示すように、従来の電力伝送システムの送電装置１は、少なくとも電圧発生回路１２及び昇圧トランス１３を有する送電モジュール１０と、結合電極１１とを備えている。図１０の等価回路では、電圧発生回路１２で発生した１０ｋＨｚ～１０ＭＨｚの周波数の交流電圧が昇圧トランス１３により昇圧され、能動電極（第一の能動電極）１１ａが高電圧となり、受動電極（第一の受動電極）１１ｐが低電圧となる。 FIG. 10 is an equivalent circuit diagram of a conventional power transmission system. As shown in FIG. 10, a power transmission device 1 of a conventional power transmission system 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. 10, 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 electrode) The passive electrode 11p becomes a low voltage.
　受電装置２は、少なくとも降圧トランス２３を有する受電モジュール２０と、結合電極２１とを備えている。図１０の等価回路では、容量ＣＧは、送電装置１の能動電極１１ａと受動電極１１ｐとの間の容量である。容量ＣＬは、受電装置２の能動電極（第二の能動電極）２１ａと受動電極（第二の受動電極）２１ｐとの間の容量である。容量ＣＭは送電装置１の能動電極１１ａと受電装置２の能動電極２１ａとの間の容量に相当する。なお、図１０では、共振回路も含めて記載しているが、電力伝送の安定度を高めるためであり、必ずしも共振回路は必要ではない。 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. 10, the capacitor CG is a capacitor between the active electrode 11 a and the 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 11a of the power transmission device 1 and the active electrode 21a of the power reception device 2. In FIG. 10, the resonance circuit is also included, but this is for increasing the stability of power transmission, and the resonance circuit is not necessarily required.
特表２００９－５３１００９号公報JP-T 2009-531009 特開平０６－１５００７９号公報Japanese Patent Laid-Open No. 06-150079
　図９に示す電力伝送システムでは、送電装置１の受動電極１１ｐと受電装置２の受動電極２１ｐとが離れており、受動電極１１ｐ、２１ｐ同士の結合容量を大きくして安定した電力伝送を行うことができるように、送電装置１の受動電極１１ｐ及び受電装置２の受動電極２１ｐのサイズ（面積）を大きくしてある。充電可能面積を広げる場合、あるいは複数の受電装置２を同時に充電できるよう送電装置１の能動電極１１ａのサイズを大きくした場合、受動電極１１ｐ、２１ｐのサイズをさらに大きくする必要が生じる。しかし、受動電極１１ｐ、２１ｐのサイズを大きくするにも限度があり、送電装置１の能動電極１１ａの干渉により受動電極１１ｐ、２１ｐ間の容量結合が阻害されるおそれがあるという問題点があった。 In the power transmission system shown in FIG. 9, the passive electrode 11p of the power transmission device 1 and the passive electrode 21p of the power reception device 2 are separated, and the coupling capacity between the passive electrodes 11p and 21p is increased to perform stable power transmission. Therefore, the size (area) of the passive electrode 11p of the power transmitting device 1 and the passive electrode 21p of the power receiving device 2 is increased. When the chargeable area is increased, or when the size of the active electrode 11a of the power transmission device 1 is increased so that the plurality of power receiving devices 2 can be charged simultaneously, it is necessary to further increase the size of the passive electrodes 11p and 21p. However, there is a limit in increasing the size of the passive electrodes 11p and 21p, and there is a problem that capacitive coupling between the passive electrodes 11p and 21p may be hindered by interference of the active electrode 11a of the power transmission device 1. .
　そのため、例えば特許文献２に開示してある非接触型ＩＣメモリカードシステムでは、受電装置２を送電装置１に装着した場合、送電装置１の能動電極１１ａ、受電装置２の能動電極２１ａ、受電装置２の受動電極２１ｐ、送電装置１の受動電極１１ｐという順に配置される。しかし、特許文献２では、カード状の受電装置２に対してしか適用することができず、受電装置２の形状を制限してしまうという問題点があった。 Therefore, for example, in the non-contact IC memory card system disclosed in Patent Document 2, when the power receiving device 2 is attached to the power transmitting device 1, the active electrode 11a of the power transmitting device 1, the active electrode 21a of the power receiving device 2, the power receiving device The second passive electrode 21p and the passive electrode 11p of the power transmission device 1 are arranged in this order. However, Patent Document 2 can be applied only to the card-shaped power receiving device 2 and has a problem that the shape of the power receiving device 2 is limited.
　本発明は、上記事情に鑑みてなされたものであり、受動電極間の結合容量を大きくすることにより電力伝送効率を高め、周囲への不要な電界の漏えいを防止することができる電力伝送システム及び送電装置を提供することを目的とする。 The present invention has been made in view of the above circumstances, and can improve the power transmission efficiency by increasing the coupling capacitance between the passive electrodes, and can prevent the leakage of unnecessary electric fields to the surroundings. An object is to provide a power transmission device.
　上記目的を達成するために本発明に係る電力伝送システムは、第一の受動電極、該第一の受動電極より高電位である第一の能動電極、及び前記第一の受動電極と前記第一の能動電極との間に接続された電圧発生回路を備える送電装置と、第二の受動電極、及び該第二の受動電極より高電位である第二の能動電極を備え、前記送電装置に装着することが可能な受電装置とを備える電力伝送システムであって、前記受電装置を前記送電装置に装着した場合、前記送電装置の前記第一の能動電極、前記受電装置の前記第二の能動電極、及び前記受電装置の前記第二の受動電極を覆うように、前記送電装置の前記第一の受動電極を配置してあることを特徴とする。 To achieve the above object, a power transmission system according to the present invention includes a first passive electrode, a first active electrode having a higher potential than the first passive electrode, and the first passive electrode and the first passive electrode. A power transmission device including a voltage generating circuit connected between the active electrode and a second passive electrode, and a second active electrode having a higher potential than the second passive electrode, and is attached to the power transmission device A power transmission system including a power receiving device capable of performing the first active electrode of the power transmitting device and the second active electrode of the power receiving device when the power receiving device is attached to the power transmitting device. And the first passive electrode of the power transmission device is disposed so as to cover the second passive electrode of the power receiving device.
　上記構成では、受電装置を送電装置に装着した場合、送電装置の第一の能動電極、受電装置の第二の能動電極、及び受電装置の第二の受動電極を覆うように、送電装置の第一の受動電極を配置することにより、第一の受動電極のサイズを大きくすることができるので、第一の受動電極と第二の受動電極との間の結合容量を大きくすることができ、電力の伝送効率を高めることが可能となる。また、周囲への不要な電界の漏えいを防止することが可能となる。 In the above configuration, when the power reception device is attached to the power transmission device, the first power electrode of the power transmission device is covered so as to cover the first active electrode of the power transmission device, the second active electrode of the power reception device, and the second passive electrode of the power reception device. By disposing one passive electrode, the size of the first passive electrode can be increased, so that the coupling capacitance between the first passive electrode and the second passive electrode can be increased, and the power The transmission efficiency can be increased. Further, unnecessary electric field leakage to the surroundings can be prevented.
　また、本発明に係る電力伝送システムにおいて、前記送電装置は、前記受電装置を載置する台座部と、前記受電装置を前記台座部に載置した状態で収容する筺体とを備え、前記受電装置の前記台座部に載置する面に前記第二の能動電極を設けてあり、前記筺体の内面の一部又は全てに前記第一の受動電極を設けてあることが好ましい。 In the power transmission system according to the present invention, the power transmission device includes a pedestal portion on which the power reception device is placed, and a housing that houses the power reception device in a state of being placed on the pedestal portion. It is preferable that the second active electrode is provided on the surface of the pedestal portion, and the first passive electrode is provided on a part or all of the inner surface of the housing.
　上記構成では、受電装置の台座部に載置する面に第二の能動電極を設けてあり、筺体の内面の一部又は全てに第一の受動電極を設けてあるので、第一の受動電極のサイズを大きくすることができ、第一の受動電極と第二の受動電極との間の結合容量を大きくすることができ、電力の伝送効率を高めることが可能となる。また、周囲への不要な電界の漏えいを防止することが可能となる。さらに、受電装置が筺体に収容された時点で電力の伝送を開始するようにすることで、受電装置を台座部へ安全に載置することが可能となる。 In the above configuration, the second active electrode is provided on the surface to be placed on the pedestal portion of the power receiving device, and the first passive electrode is provided on a part or all of the inner surface of the housing. Can be increased, the coupling capacitance between the first passive electrode and the second passive electrode can be increased, and the power transmission efficiency can be increased. Further, unnecessary electric field leakage to the surroundings can be prevented. Furthermore, by starting the transmission of power when the power receiving device is accommodated in the housing, the power receiving device can be safely placed on the pedestal.
　また、本発明に係る電力伝送システムにおいて、前記筺体の一部又は全てが透明な材質で構成されていることが好ましい。 Further, in the power transmission system according to the present invention, it is preferable that a part or all of the casing is made of a transparent material.
　上記構成では、筺体の一部又は全てが透明な材質で構成されているので、受電装置が載置されているか否か、充電の進捗度合い等を外部から視認することが可能となる。 In the above configuration, since a part or all of the casing is made of a transparent material, it is possible to visually check whether or not the power receiving device is placed, the progress of charging, and the like from the outside.
　また、本発明に係る電力伝送システムにおいて、はたき状の第三の受動電極及び／又は帯状の第四の受動電極を、前記送電装置の前記第一の受動電極に接続して設けてあることが好ましい。 Further, in the power transmission system according to the present invention, a blade-like third passive electrode and / or a belt-like fourth passive electrode may be provided connected to the first passive electrode of the power transmission device. preferable.
　上記構成では、はたき状の第三の受動電極及び／又は帯状の第四の受動電極を、送電装置の第一の受動電極に接続して設けてあるので、第三の受動電極及び／又は第四の受動電極を第二の受動電極に近接するよう配置することで、送電装置の第一の受動電極と受電装置の第二の受動電極とを接近させたのと同様となり、第一の受動電極と第二の受動電極との間の結合容量を大きくすることができ、電力の伝送効率を高めることが可能となる。 In the above configuration, the third passive electrode and / or the fourth passive electrode in the form of a strip are connected to the first passive electrode of the power transmission device, so the third passive electrode and / or the second passive electrode is provided. By placing the four passive electrodes close to the second passive electrode, the first passive electrode of the power transmission device and the second passive electrode of the power receiving device are brought close to each other. The coupling capacitance between the electrode and the second passive electrode can be increased, and the power transmission efficiency can be increased.
　次に、上記目的を達成するために本発明に係る送電装置は、第二の受動電極、及び該第二の受動電極より高電位である第二の能動電極を備える受電装置との間で容量結合し、該受電装置へ電力を伝送する送電装置であって、第一の受動電極、該第一の受動電極より高電位である第一の能動電極、及び前記第一の受動電極と前記第一の能動電極との間に接続された電圧発生回路とを備え、前記受電装置が装着された場合、前記第一の能動電極、前記受電装置の前記第二の能動電極、及び前記受電装置の前記第二の受動電極を覆うように、前記第一の受動電極を配置してあることを特徴とする。 Next, in order to achieve the above object, a power transmission device according to the present invention has a capacity between a second passive electrode and a power reception device including a second active electrode having a higher potential than the second passive electrode. A power transmission device coupled to transmit power to the power receiving device, the first passive electrode, a first active electrode having a higher potential than the first passive electrode, and the first passive electrode and the first A voltage generating circuit connected to one active electrode, and when the power receiving device is mounted, the first active electrode, the second active electrode of the power receiving device, and the power receiving device The first passive electrode is arranged so as to cover the second passive electrode.
　上記構成では、受電装置が装着された場合、第一の能動電極、受電装置の第二の能動電極、及び受電装置の第二の受動電極を覆うように、第一の受動電極を配置することにより、第一の受動電極のサイズを大きくすることができるので、第一の受動電極と第二の受動電極との間の結合容量を大きくすることができ、電力の伝送効率を高めることが可能となる。また、受電装置がどのような形状であっても確実に電力を伝送することができるとともに、周囲への不要な電界の漏えいを防止することが可能となる。 In the above configuration, when the power receiving device is attached, the first passive electrode is disposed so as to cover the first active electrode, the second active electrode of the power receiving device, and the second passive electrode of the power receiving device. Since the size of the first passive electrode can be increased, the coupling capacitance between the first passive electrode and the second passive electrode can be increased, and the power transmission efficiency can be increased. It becomes. In addition, power can be reliably transmitted regardless of the shape of the power receiving device, and unnecessary electric field leakage to the surroundings can be prevented.
　本発明に係る電力伝送システム及び送電装置では、受電装置を送電装置に装着した場合、送電装置の第一の能動電極、受電装置の第二の能動電極、及び受電装置の第二の受動電極を覆うように、送電装置の第一の受動電極を配置することにより、第一の受動電極のサイズを大きくすることができるので、第一の受動電極と第二の受動電極との間の結合容量を大きくすることができ、電力の伝送効率を高めることが可能となる。また、周囲への不要な電界の漏えいを防止することが可能となる。 In the power transmission system and the power transmission device according to the present invention, when the power reception device is attached to the power transmission device, the first active electrode of the power transmission device, the second active electrode of the power reception device, and the second passive electrode of the power reception device. By arranging the first passive electrode of the power transmission device so as to cover, the size of the first passive electrode can be increased, so that the coupling capacitance between the first passive electrode and the second passive electrode The power transmission efficiency can be increased. Further, unnecessary electric field leakage to the surroundings can be prevented.
本発明の実施の形態１に係る電力伝送システムの構成を示す模式図である。It is a schematic diagram which shows the structure of the electric power transmission system which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る電力伝送システムの、送電装置に受電装置を載置する台座部を設けた場合の構成を模式的に示す透過斜視図である。It is a permeation | transmission perspective view which shows typically the structure at the time of providing the base part which mounts a power receiving apparatus in the power transmission apparatus of the power transmission system which concerns on Embodiment 1 of this invention. 本発明の実施の形態２に係る電力伝送システムの構成を模式的に示す透過斜視図である。It is a permeation | transmission perspective view which shows typically the structure of the electric power transmission system which concerns on Embodiment 2 of this invention. 本発明の実施の形態２に係る電力伝送システムの、筺体が蓋部を有する場合の構成を示す模式図である。It is a schematic diagram which shows the structure in case the housing has a cover part of the electric power transmission system which concerns on Embodiment 2 of this invention. 本発明の実施の形態２に係る電力伝送システムの他の構成を示す模式図である。It is a schematic diagram which shows the other structure of the electric power transmission system which concerns on Embodiment 2 of this invention. 本発明の実施の形態３に係る電力伝送システムの構成を示す模式図である。It is a schematic diagram which shows the structure of the electric power transmission system which concerns on Embodiment 3 of this invention. 本発明の実施の形態３に係る電力伝送システムの、帯状の第四の受動電極を併用した場合の構成を示す模式図である。It is a schematic diagram which shows the structure at the time of using together the strip | belt-shaped 4th passive electrode of the electric power transmission system which concerns on Embodiment 3 of this invention. 本発明の実施の形態３に係る電力伝送システムの、受電装置の形状が円柱状である場合の構成を示す模式図である。It is a schematic diagram which shows the structure in case the shape of the power receiving apparatus is a column shape of the power transmission system which concerns on Embodiment 3 of this invention. 従来の電場を形成して電力を伝送する電力伝送システムの構成を示す模式図である。It is a schematic diagram which shows the structure of the power transmission system which forms the conventional electric field and transmits electric power. 従来の電力伝送システムの等価回路図である。It is an equivalent circuit diagram of a conventional power transmission system.
　以下、本発明の実施の形態における電力伝送システムについて、図面を用いて具体的に説明する。以下の実施の形態は、請求の範囲に記載された発明を限定するものではなく、実施の形態の中で説明されている特徴的事項の組み合わせの全てが解決手段の必須事項であるとは限らないことは言うまでもない。 Hereinafter, the power transmission system according to the 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 not necessarily essential to the solution means. It goes without saying that there is nothing.
　（実施の形態１）
　本発明の実施の形態１に係る電力伝送システムの等価回路図は、従来の構成と同様であることから、図１０と同一の符号を付することで詳細な説明は省略する。図１は、本発明の実施の形態１に係る電力伝送システムの構成を示す模式図である。 (Embodiment 1)
Since the equivalent circuit diagram of the power transmission system according to Embodiment 1 of the present invention is the same as the conventional configuration, the same reference numerals as those in FIG. FIG. 1 is a schematic diagram showing a configuration of a power transmission system according to Embodiment 1 of the present invention.
　図１に示すように、本実施の形態１に係る電力伝送システムの受電装置２は、負荷回路２２を挟んで、第二の能動電極２１ａと第二の受動電極２１ｐとを備えている。受電装置２の第二の能動電極２１ａは、送電装置１の第一の能動電極１１ａと空隙を介して対向しており、電界１８を形成して容量結合している。 As shown in FIG. 1, the power receiving device 2 of the power transmission system according to the first embodiment includes a second active electrode 21a and a second passive electrode 21p with a load circuit 22 interposed therebetween. The second active electrode 21a of the power receiving device 2 is opposed to the first active electrode 11a of the power transmitting device 1 via a gap, and forms an electric field 18 and is capacitively coupled.
　受電装置２の第二の能動電極２１ａと送電装置１の第一の能動電極１１ａとの間の空隙の大きさは、能動電極１１ａ、２１ａの表面に設けた絶縁膜の厚みの総和である。一方、送電装置１の第一の能動電極１１ａには第一の受動電極１１ｐより大きな電荷密度が発生するので空隙の電界１８は強くなる。 The size of the gap between the second active electrode 21a of the power receiving device 2 and the first active electrode 11a of the power transmitting device 1 is the sum of the thicknesses of the insulating films provided on the surfaces of the active electrodes 11a and 21a. On the other hand, the first active electrode 11a of the power transmission device 1 has a higher charge density than the first passive electrode 11p, so the electric field 18 in the air gap becomes stronger.
　送電装置１の第一の受動電極１１ｐは、受電装置２を収容する筺体２５の内面全体に設けてある。したがって、受電装置２の第二の受動電極２１ｐは、筺体２５の内面全体に設けてある第一の受動電極１１ｐの一部と相対的に大きな距離を隔てて対向するので、相対的に弱い電界１９を形成して容量結合する。しかし、受電装置２の第二の受動電極２１ｐのサイズを第二の能動電極２１ａのサイズより大きくするとともに、第一の受動電極１１ｐのサイズを大きくすることができるので、第一の受動電極１１ｐと第二の受動電極２１ｐとの間の結合容量を大きくすることができる。したがって、電力の伝送効率を高めることが可能となる。 The first passive electrode 11 p of the power transmission device 1 is provided on the entire inner surface of the housing 25 that houses the power reception device 2. Therefore, the second passive electrode 21p of the power receiving device 2 is opposed to a part of the first passive electrode 11p provided on the entire inner surface of the housing 25 with a relatively large distance, and therefore a relatively weak electric field. 19 is formed and capacitively coupled. However, since the size of the second passive electrode 21p of the power receiving device 2 can be made larger than the size of the second active electrode 21a and the size of the first passive electrode 11p can be increased, the first passive electrode 11p And the second passive electrode 21p can be increased in coupling capacitance. Therefore, it is possible to increase the power transmission efficiency.
　図２は、本発明の実施の形態１に係る電力伝送システムの、受電装置２を載置する台座部を設けた場合の構成を模式的に示す透過斜視図である。図２では、筺体２５の下部に受電装置２を載置する台座部４１を設けてある。台座部４１の天面には、第一の能動電極１１ａを設けてあり、筺体２５の天面及び底面には第一の受動電極１１ｐが設けてある。図２では筺体２５の天面及び底面の二面に第一の受動電極１１ｐを設けてあるが、実際には他の四面にも第一の受動電極１１ｐを設けることが好ましい。周囲への不要な電界の漏えいを防止することができるからである。 FIG. 2 is a transparent perspective view schematically showing the configuration of the power transmission system according to Embodiment 1 of the present invention when a pedestal portion on which the power receiving device 2 is placed is provided. In FIG. 2, a pedestal portion 41 on which the power receiving device 2 is placed is provided below the housing 25. A first active electrode 11 a is provided on the top surface of the pedestal portion 41, and a first passive electrode 11 p is provided on the top and bottom surfaces of the housing 25. In FIG. 2, the first passive electrode 11p is provided on the top surface and the bottom surface of the housing 25. However, in practice, it is preferable to provide the first passive electrode 11p on the other four surfaces. This is because unnecessary electric field leakage to the surroundings can be prevented.
　受電装置２は、第二の能動電極２１ａが台座部４１の天面に設けてある第一の能動電極１１ａと対向するように、台座部４１に載置する。これにより、第二の能動電極２１ａと第一の能動電極１１ａとが容量結合する。一方、受電装置２の第二の受動電極２１ｐは、筺体２５の天面に設けてある第一の受動電極電１１ｐと容量結合する。 The power receiving device 2 is placed on the pedestal portion 41 so that the second active electrode 21a faces the first active electrode 11a provided on the top surface of the pedestal portion 41. As a result, the second active electrode 21a and the first active electrode 11a are capacitively coupled. On the other hand, the second passive electrode 21p of the power receiving device 2 is capacitively coupled to the first passive electrode 11p provided on the top surface of the housing 25.
　以上のように本実施の形態１によれば、受電装置２を送電装置１に装着した場合、送電装置１の第一の能動電極１１ａ、受電装置２の第二の能動電極２１ａ、及び受電装置２の第二の受動電極２１ｐを覆うように、送電装置１の第一の受動電極１１ｐを配置することにより、第一の受動電極１１ｐのサイズを大きくすることができるので、第二の受動電極２１ｐとの間の結合容量を大きくすることができ、電力の伝送効率を高めることが可能となる。また、周囲への不要な電界の漏えいを防止することも可能となる。 As described above, according to the first embodiment, when the power receiving device 2 is attached to the power transmitting device 1, the first active electrode 11a of the power transmitting device 1, the second active electrode 21a of the power receiving device 2, and the power receiving device. Since the size of the first passive electrode 11p can be increased by arranging the first passive electrode 11p of the power transmission device 1 so as to cover the second passive electrode 21p, the second passive electrode It is possible to increase the coupling capacity between the power source 21p and the power transmission efficiency. It is also possible to prevent unnecessary electric field leakage to the surroundings.
　（実施の形態２）
　本発明の実施の形態２に係る電力伝送システムの基本的な構成は、実施の形態１と同様であることから、同一の符号を付することで詳細な説明は省略する。本実施の形態２は、送電装置１に複数の受電装置２を同時に装着して電力を伝送する点で実施の形態１とは相違する。 (Embodiment 2)
Since the basic configuration of the power transmission system according to the second embodiment of the present invention is the same as that of the first embodiment, detailed description will be omitted by attaching the same reference numerals. The second embodiment is different from the first embodiment in that a plurality of power receiving devices 2 are simultaneously attached to the power transmitting device 1 to transmit power.
　図３は、本発明の実施の形態２に係る電力伝送システムの構成を模式的に示す透過斜視図である。図３では、筺体２５の下部に、受電装置２を載置する台座部４１を設けてあり、台座部４１の天面に第一の能動電極１１ａを設けてある。筺体２５の天面及び底面には第一の受動電極１１ｐが設けてある。図３では筺体２５の天面及び底面の二面に第一の受動電極１１ｐを設けてあるが、実際には他の四面にも第一の受動電極１１ｐを設けることが好ましい。周囲への不要な電界の漏えいを防止することができるからである。 FIG. 3 is a transparent perspective view schematically showing the configuration of the power transmission system according to Embodiment 2 of the present invention. In FIG. 3, a pedestal portion 41 on which the power receiving device 2 is placed is provided below the housing 25, and the first active electrode 11 a is provided on the top surface of the pedestal portion 41. A first passive electrode 11p is provided on the top and bottom surfaces of the casing 25. In FIG. 3, the first passive electrode 11p is provided on the top surface and the bottom surface of the housing 25. However, in practice, it is preferable to provide the first passive electrode 11p on the other four surfaces. This is because unnecessary electric field leakage to the surroundings can be prevented.
　受電装置２は、台座部４１のどこに載置しても良いし、複数の受電装置２を台座部４１に載置しても良い。受電装置２は、第二の能動電極２１ａが台座部４１の天面に設けてある第一の能動電極１１ａと対向するように台座部４１に載置する。これにより、第二の能動電極２１ａと第一の能動電極１１ａとが容量結合する。一方、受電装置２の第二の受動電極２１ｐは、筺体２５の天面に設けてある第一の受動電極電１１ｐと容量結合する。 The power receiving device 2 may be placed anywhere on the pedestal portion 41, and a plurality of power receiving devices 2 may be placed on the pedestal portion 41. The power receiving device 2 is placed on the pedestal portion 41 so that the second active electrode 21 a faces the first active electrode 11 a provided on the top surface of the pedestal portion 41. As a result, the second active electrode 21a and the first active electrode 11a are capacitively coupled. On the other hand, the second passive electrode 21p of the power receiving device 2 is capacitively coupled to the first passive electrode 11p provided on the top surface of the housing 25.
　筺体２５を透明な材質で構成し、天面及び底面に設けてある第一の受動電極１１ｐをＩＴＯ（酸化インジウムスズ）等の透明電極で形成して、筺体２５及び第一の受動電極１１ｐを透明にすることで、筺体２５の内部に載置した受電装置２、受電装置２に設けられた充電状態表示等を外部から視認することができる。その結果、受電装置２が載置されているか否か、載置されている受電装置２の種類は何か、充電はどの程度まで進んでいるか、等を外部から視認することができる。もちろん、全てを透明な材質で構成することに限定されるものではなく、一部が透明な材質であっても良い。 The casing 25 is made of a transparent material, the first passive electrode 11p provided on the top and bottom surfaces is formed of a transparent electrode such as ITO (indium tin oxide), and the casing 25 and the first passive electrode 11p are formed. By making it transparent, the power receiving device 2 placed inside the housing 25, the charge state display provided in the power receiving device 2, and the like can be viewed from the outside. As a result, whether or not the power receiving device 2 is placed, what kind of the power receiving device 2 is placed, to what extent the charging has progressed, etc. can be visually recognized from the outside. Of course, it is not limited to comprising all of a transparent material, and a part of the material may be transparent.
　また、筺体２５の一部を蓋、扉等で構成しても良い。図４は、本発明の実施の形態２に係る電力伝送システムの、筺体２５が蓋部を有する場合の構成を示す模式図である。図４（ａ）は、筺体２５が蓋部６１を有する場合の構成を示す斜視図を、図４（ｂ）は、筺体２５が蓋部６１を有する場合の構成を示す断面図を、それぞれ示している。 Further, a part of the housing 25 may be constituted by a lid, a door, or the like. FIG. 4 is a schematic diagram showing a configuration of the power transmission system according to Embodiment 2 of the present invention when the housing 25 has a lid. 4A is a perspective view showing a configuration when the housing 25 has the lid portion 61, and FIG. 4B shows a cross-sectional view showing a configuration when the housing 25 has the lid portion 61. ing.
　図４（ａ）に示すように、蝶番６２を介して台座部４１と蓋部６１とが連結されて筺体２５を構成している。台座部４１に受電装置２を載置した場合、蓋部６１を閉じることにより、電力を伝送する。 As shown in FIG. 4A, the base portion 41 and the lid portion 61 are connected via a hinge 62 to constitute a housing 25. When the power receiving device 2 is placed on the pedestal portion 41, power is transmitted by closing the lid portion 61.
　すなわち、図４（ｂ）に示すように、受電装置２は、台座部４１の天面側に設けてある第一の能動電極１１ａと第二の能動電極２１ａとが対向するように、台座部４１に載置する。そして、蓋部６１を蝶番６２で回転させて台座部４１へかぶせることで受電装置２を筺体２５へ収容することができる。そして蓋部６１の内面全体に設けてある第一の受動電極１１ｐと受電装置２の第二の受動電極２１ｐとを容量結合させることにより、効率よく電力を伝送することができる。 That is, as illustrated in FIG. 4B, the power receiving device 2 is configured so that the first active electrode 11 a and the second active electrode 21 a provided on the top surface side of the pedestal portion 41 face each other. 41. Then, the power receiving device 2 can be accommodated in the housing 25 by rotating the lid portion 61 with the hinge 62 and covering the lid portion 41. Then, the first passive electrode 11p provided on the entire inner surface of the lid 61 and the second passive electrode 21p of the power receiving device 2 can be capacitively coupled to transmit power efficiently.
　なお、蓋部６１を閉じた時点で電力の伝送を開始するようにしても良い。具体的には、電圧発生回路１２と接続するスイッチを設けておき、蓋部６１が台座部４１と接触した時点でスイッチがオン状態となり通電するようにすれば良い。 Note that power transmission may be started when the lid 61 is closed. Specifically, a switch connected to the voltage generation circuit 12 may be provided so that the switch is turned on and energized when the lid 61 comes into contact with the pedestal 41.
　もちろん、蝶番６２を介して台座部４１と蓋部６１とが連結された筺体２５を構成することに限定されるものではない。図５は、本発明の実施の形態２に係る電力伝送システムの他の構成を示す模式図である。 Of course, the present invention is not limited to configuring the casing 25 in which the pedestal portion 41 and the lid portion 61 are connected via the hinge 62. FIG. 5 is a schematic diagram showing another configuration of the power transmission system according to Embodiment 2 of the present invention.
　図５（ａ）に示すように、筺体２５の一面を扉状に開閉する扉部７１で構成しても良い。この場合、例えば扉部７１の内面に第一の受動電極１１ｐを設けておき、扉部７１を開けて受電装置２を載置し、扉部７１を閉じた時点で電力の伝送を開始する。 As shown in FIG. 5 (a), one surface of the housing 25 may be constituted by a door portion 71 that opens and closes like a door. In this case, for example, the first passive electrode 11p is provided on the inner surface of the door portion 71, the door portion 71 is opened, the power receiving device 2 is placed, and power transmission is started when the door portion 71 is closed.
　また、図５（ｂ）に示すように、筺体２５の一部を引き出し部７２で構成しても良い。この場合、例えば引き出し部７２の内面側に第一の受動電極１１ｐを設けておき、引き出し部７２を引き出して受電装置２を載置し、引き出し部７２を押し込んだ時点で電力の伝送を開始する。 Further, as shown in FIG. 5 (b), a part of the housing 25 may be constituted by a drawer portion 72. In this case, for example, the first passive electrode 11p is provided on the inner surface side of the lead portion 72, the lead portion 72 is pulled out, the power receiving device 2 is placed, and transmission of power is started when the lead portion 72 is pushed. .
　さらに、図５（ｃ）に示すように、直方体形状ではない筺体２５の天面を、蓋部７３で構成しても良い。この場合、蓋部７３の内面に第一の受動電極１１ｐを設けておき、蓋部７３を開けて受電装置２を載置し、蓋部７３を閉じた時点で電力伝送を開始する。 Furthermore, as shown in FIG. 5 (c), the top surface of the casing 25 that is not a rectangular parallelepiped shape may be configured by a lid 73. In this case, the first passive electrode 11p is provided on the inner surface of the lid 73, the lid 73 is opened, the power receiving device 2 is placed, and power transmission is started when the lid 73 is closed.
　以上のように本実施の形態２によれば、一又は複数の受電装置２を送電装置１に装着した場合、送電装置１の第一の能動電極１１ａ、受電装置２の第二の能動電極２１ａ、及び受電装置２の第二の受動電極２１ｐを覆うように、送電装置１の第一の受動電極１１ｐを配置することにより、第一の受動電極１１ｐのサイズを大きくすることができるので、第一の受動電極１１ｐと第二の受動電極２１ｐとの間の結合容量を大きくすることができ、電力の伝送効率を高めることが可能となる。また、周囲への不要な電界の漏えいを防止することも可能となる。 As described above, according to the second embodiment, when one or a plurality of power receiving devices 2 are attached to the power transmitting device 1, the first active electrode 11a of the power transmitting device 1 and the second active electrode 21a of the power receiving device 2 are used. And by arranging the first passive electrode 11p of the power transmission device 1 so as to cover the second passive electrode 21p of the power receiving device 2, the size of the first passive electrode 11p can be increased. The coupling capacitance between the one passive electrode 11p and the second passive electrode 21p can be increased, and the power transmission efficiency can be increased. It is also possible to prevent unnecessary electric field leakage to the surroundings.
　なお、受電装置２から電力の伝送を要求し、要求があった時点で電力の伝送を開始し、充電が完了した時点で容量結合を切断するようにしても良い。さらに、受電装置２が載置されている場合のみ電力を伝送するようにしても良い。例えば台座部４１に受電装置２が載置されたことを検知するセンサを設けておき、受電装置２が載置されたことを検知した場合に電圧発生回路１２と接続するスイッチがオン状態となって通電し、取り外されたことを検知した場合に電圧発生回路１２と接続するスイッチがオフ状態となって充電を終了するようにすれば良い。受電装置２が載置されていない領域については、第一の能動電極１１ａから不要な電界が発生するものの、筺体２５の一部又は全てに第一の受動電極１１ｐを設けてあるので、周囲への不要な電界の漏えいを防止することも可能となる。 It should be noted that power transmission may be requested from the power receiving apparatus 2, power transmission may be started when requested, and capacitive coupling may be disconnected when charging is completed. Furthermore, power may be transmitted only when the power receiving device 2 is placed. For example, a sensor that detects that the power receiving device 2 is placed on the pedestal portion 41 is provided, and when it is detected that the power receiving device 2 is placed, a switch connected to the voltage generation circuit 12 is turned on. When it is detected that the power is removed and the battery is removed, the switch connected to the voltage generation circuit 12 is turned off to end the charging. In the region where the power receiving device 2 is not mounted, although an unnecessary electric field is generated from the first active electrode 11a, the first passive electrode 11p is provided in a part or all of the housing 25, so It is also possible to prevent leakage of unnecessary electric field.
　（実施の形態３）
　本発明の実施の形態３に係る電力伝送システムの基本的な構成は、実施の形態１と同様であることから、図９及び図１０と同一の符号を付することで詳細な説明は省略する。本実施の形態３は、はたき状の第三の受動電極及び／又は帯状の第四の受動電極を送電装置１の第一の受動電極１１ｐに接続して設けてある点で実施の形態１及び２とは相違する。 (Embodiment 3)
Since the basic configuration of the power transmission system according to the third embodiment of the present invention is the same as that of the first embodiment, the same reference numerals as those in FIGS. . The third embodiment is different from the first and second embodiments in that a blade-like third passive electrode and / or a belt-like fourth passive electrode is provided connected to the first passive electrode 11p of the power transmission device 1. 2 is different.
　図６は、本発明の実施の形態３に係る電力伝送システムの構成を示す模式図である。図６に示すように、本実施の形態３に係る電力伝送システムの受電装置２は、負荷回路２２を挟んで、能動電極（第二の能動電極）２１ａと受動電極（第二の受動電極）２１ｐとを備えている。受電装置２の第二の能動電極２１ａは、送電装置１の第一の能動電極１１ａと対向しており、強い電界１８を形成して容量結合している。 FIG. 6 is a schematic diagram showing a configuration of the power transmission system according to the third embodiment of the present invention. As illustrated in FIG. 6, the power receiving device 2 of the power transmission system according to the third embodiment includes an active electrode (second active electrode) 21 a and a passive electrode (second passive electrode) across a load circuit 22. 21p. The second active electrode 21a of the power receiving device 2 is opposed to the first active electrode 11a of the power transmitting device 1, and forms a strong electric field 18 and is capacitively coupled.
　送電装置１の第一の受動電極１１ｐは、受電装置２を収容する筺体２５の内面全体に設けてある。また、受電装置２の第二の受動電極２１ｐに最も近い筺体２５の内面に、はたき状の第三の受動電極８１を、第一受動電極１１ｐに接続して設けてある。はたき状の第三の受動電極８１の存在により、送電装置１の第一の受動電極１１ｐと受電装置２の第二の受動電極２１ｐとを接近させたのと同様となり、より容易に強い電界１９を形成して容量結合することができるとともに、結合容量を大きくすることができる。したがって、電力の伝送効率を高めることが可能となる。 The first passive electrode 11 p of the power transmission device 1 is provided on the entire inner surface of the housing 25 that houses the power reception device 2. In addition, on the inner surface of the casing 25 closest to the second passive electrode 21p of the power receiving device 2, a blade-like third passive electrode 81 is connected to the first passive electrode 11p. The presence of the blade-like third passive electrode 81 is the same as bringing the first passive electrode 11p of the power transmitting device 1 close to the second passive electrode 21p of the power receiving device 2, and more easily the strong electric field 19 Can be formed and capacitive coupling can be performed, and the coupling capacity can be increased. Therefore, it is possible to increase the power transmission efficiency.
　なお、はたき状の第三の受動電極８１は、金属箔、金属テープ、カーボン繊維等で構成すれば足り、第一の受動電極１１ｐに接続した第三の受動電極８１の表面は絶縁コーティングしておいても良い。 In addition, it is sufficient that the third passive electrode 81 having a blade shape is made of metal foil, metal tape, carbon fiber, or the like, and the surface of the third passive electrode 81 connected to the first passive electrode 11p is insulation-coated. You can leave it.
　図７は、本発明の実施の形態３に係る電力伝送システムの、帯状の第四の受動電極を併用した場合の構成を示す模式図である。はたき状の第三の受動電極８１及び帯状の第四の受動電極９１は、蝶番６２を介して開閉することが可能な蓋部６１に、送電装置１の受動電極１１ｐと接続して設けてある。蓋部６１を閉じた場合、まず帯状の第四の受動電極９１が、台座部４１に載置してある受電装置２の形状に沿って変形し、受電装置２と密着する。次に、受電装置２と密着した第四の受動電極９１にはたき状の第三の受動電極８１が接触する。したがって、送電装置１の第一の受動電極１１ｐと受電装置２の第二の受動電極２１ｐとを接近させたのと同様となり、結合容量を大きくすることができ、電力の伝送効率を高めることが可能となる。 FIG. 7 is a schematic diagram showing a configuration of the power transmission system according to Embodiment 3 of the present invention when a band-shaped fourth passive electrode is used in combination. The blade-like third passive electrode 81 and the belt-like fourth passive electrode 91 are provided on the lid 61 that can be opened and closed via a hinge 62 and connected to the passive electrode 11p of the power transmission device 1. . When the lid portion 61 is closed, first, the band-like fourth passive electrode 91 is deformed along the shape of the power receiving device 2 placed on the pedestal portion 41 and is in close contact with the power receiving device 2. Next, the third passive electrode 81 in contact with the fourth passive electrode 91 in close contact with the power receiving device 2 is in contact with the fourth passive electrode 91. Therefore, the first passive electrode 11p of the power transmission device 1 and the second passive electrode 21p of the power reception device 2 are similar to each other, the coupling capacity can be increased, and the power transmission efficiency can be increased. It becomes possible.
　以上のように本実施の形態３によれば、はたき状の第三の受動電極８１及び／又は帯状の第四の受動電極９１を、送電装置１の第一の受動電極１１ｐに接続して設けてあるので、第三の受動電極８１及び／又は第四の受動電極９１を第二の受動電極２１ｐに近接するよう配置することで、送電装置１の第一の受動電極１１ｐと受電装置２の第二の受動電極２１ｐとを接近させたのと同様となり、受動電極間の結合容量を大きくすることができ、電力の伝送効率を向上させることが可能となる。 As described above, according to the third embodiment, the blade-like third passive electrode 81 and / or the belt-like fourth passive electrode 91 are connected to the first passive electrode 11p of the power transmission device 1 and provided. Therefore, by arranging the third passive electrode 81 and / or the fourth passive electrode 91 close to the second passive electrode 21p, the first passive electrode 11p of the power transmitting device 1 and the power receiving device 2 This is the same as bringing the second passive electrode 21p closer, and the coupling capacitance between the passive electrodes can be increased, and the power transmission efficiency can be improved.
　その他、本発明は上記実施例に限定されるものではなく、本発明の趣旨の範囲内であれば多種の変形、置換等が可能であることは言うまでもない。例えば受電装置２の形状は方形状に限定されるものではなく、例えば球状、円柱状等であっても良い。 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 present invention. For example, the shape of the power receiving device 2 is not limited to a square shape, and may be, for example, a spherical shape or a cylindrical shape.
　図８は、本発明の実施の形態３に係る電力伝送システムの、受電装置２の形状が円柱状である場合の構成を示す模式図である。図８に示すように、円柱状の受電装置２には、互いに対向する位置に一対の第二の能動電極２１ａ、２１ａを設けてある。一方の第二の能動電極２１ａが台座部４１の第一の能動電極１１ａに対向した場合、一方の第二の能動電極２１ａは第一の能動電極１１ａと容量結合する。このとき、他方の第二の能動電極２１ａは蓋部６１の第一の受動電極１１ｐに対向して、第一の受動電極１１ｐと容量結合する。一対の第二の能動電極２１ａ、２１ａで発生する同一振幅で逆位相の電圧により負荷回路２２に電流が流れて電力消費されることにより、送電装置１から受電装置２へ電力伝送することができる。なお、台座部４１の周縁部には、突起部１１１を設けることが好ましい。受電装置２が第一の能動電極１１ａの数分の一という小さいサイズであっても、送電装置１の台座部４１の周縁部の内側の領域に、受電装置２を載置することができ、電力の伝送効率を高く維持することができるからである。 FIG. 8 is a schematic diagram showing a configuration of the power transmission system according to Embodiment 3 of the present invention when the power receiving device 2 has a cylindrical shape. As shown in FIG. 8, the cylindrical power receiving device 2 is provided with a pair of second active electrodes 21 a and 21 a at positions facing each other. When one second active electrode 21a faces the first active electrode 11a of the pedestal 41, the one second active electrode 21a is capacitively coupled to the first active electrode 11a. At this time, the other second active electrode 21a faces the first passive electrode 11p of the lid portion 61 and is capacitively coupled to the first passive electrode 11p. Electric power can be transmitted from the power transmitting device 1 to the power receiving device 2 by causing a current to flow through the load circuit 22 due to a voltage having the same amplitude and opposite phase generated in the pair of second active electrodes 21a and 21a. . In addition, it is preferable to provide the protrusion 111 on the peripheral edge of the pedestal 41. Even if the power receiving device 2 is as small as a fraction of the size of the first active electrode 11a, the power receiving device 2 can be placed in a region inside the peripheral portion of the base portion 41 of the power transmitting device 1, This is because the power transmission efficiency can be kept high.
　１　送電装置
　２　受電装置
　１１ａ　能動電極（第一の能動電極）
　１１ｐ　受動電極（第一の受動電極）
　１２　電圧発生回路
　１３　昇圧トランス
　２１ａ　能動電極（第二の能動電極）
　２１ｐ　受動電極（第二の受動電極）
　２２　負荷回路
　２５　筺体
　４１　台座部
　６１、７３　蓋部
　７１　扉部
　７２　引き出し部
　８１　第三の受動電極
　９１　第四の受動電極 DESCRIPTION OF SYMBOLS 1 Power transmission apparatus 2 Power receiving apparatus 11a Active electrode (1st active electrode)
11p passive electrode (first passive electrode)
12 voltage generation circuit 13 step-up transformer 21a active electrode (second active electrode)
21p passive electrode (second passive electrode)
22 Load circuit 25 Housing 41 Base part 61, 73 Lid part 71 Door part 72 Drawer part 81 Third passive electrode 91 Fourth passive electrode

Claims (5)

  1. 　第一の受動電極、該第一の受動電極より高電位である第一の能動電極、及び前記第一の受動電極と前記第一の能動電極との間に接続された電圧発生回路を備える送電装置と、
    　第二の受動電極、及び該第二の受動電極より高電位である第二の能動電極を備え、前記送電装置に装着することが可能な受電装置と
    　を備える電力伝送システムであって、
    　前記受電装置を前記送電装置に装着した場合、前記送電装置の前記第一の能動電極、前記受電装置の前記第二の能動電極、及び前記受電装置の前記第二の受動電極を覆うように、前記送電装置の前記第一の受動電極を配置してあることを特徴とする電力伝送システム。     A power transmission comprising a first passive electrode, a first active electrode having a higher potential than the first passive electrode, and a voltage generating circuit connected between the first passive electrode and the first active electrode Equipment,
    A power transmission system comprising: a second passive electrode; and a second active electrode having a higher potential than the second passive electrode, and a power receiving device that can be attached to the power transmission device,
    When the power receiving device is attached to the power transmitting device, the first active electrode of the power transmitting device, the second active electrode of the power receiving device, and the second passive electrode of the power receiving device are covered. The power transmission system, wherein the first passive electrode of the power transmission device is arranged.
  2. 　前記送電装置は、
    　前記受電装置を載置する台座部と、
    　前記受電装置を前記台座部に載置した状態で収容する筺体と
    　を備え、
    　前記受電装置の前記台座部に載置する面に前記第二の能動電極を設けてあり、前記筺体の内面の一部又は全てに前記第一の受動電極を設けてあることを特徴とする請求項１に記載の電力伝送システム。     The power transmission device is:
    A pedestal for placing the power receiving device;
    A housing that houses the power receiving device in a state of being placed on the pedestal portion,
    The said 2nd active electrode is provided in the surface mounted in the said base part of the said power receiving apparatus, The said 1st passive electrode is provided in a part or all of the inner surface of the said housing. Item 4. The power transmission system according to Item 1.
  3. 　前記筺体の一部又は全てが透明な材質で構成されていることを特徴とする請求項２に記載の電力伝送システム。 The power transmission system according to claim 2, wherein a part or all of the casing is made of a transparent material.
  4. 　はたき状の第三の受動電極及び／又は帯状の第四の受動電極を、前記送電装置の前記第一の受動電極に接続して設けてあることを特徴とする請求項１乃至３のいずれか一項に記載の電力伝送システム。 4. A blade-like third passive electrode and / or a belt-like fourth passive electrode are provided in connection with the first passive electrode of the power transmission device. The power transmission system according to one item.
  5. 　第二の受動電極、及び該第二の受動電極より高電位である第二の能動電極を備える受電装置との間で容量結合し、該受電装置へ電力を伝送する送電装置であって、
    　第一の受動電極、該第一の受動電極より高電位である第一の能動電極、及び前記第一の受動電極と前記第一の能動電極との間に接続された電圧発生回路とを備え、
    　前記受電装置が装着された場合、前記第一の能動電極、前記受電装置の前記第二の能動電極、及び前記受電装置の前記第二の受動電極を覆うように、前記第一の受動電極を配置してあることを特徴とする送電装置。     A power transmission device that capacitively couples between a second passive electrode and a power reception device including a second active electrode that has a higher potential than the second passive electrode, and transmits power to the power reception device,
    A first passive electrode, a first active electrode having a higher potential than the first passive electrode, and a voltage generation circuit connected between the first passive electrode and the first active electrode. ,
    When the power receiving device is mounted, the first passive electrode is covered so as to cover the first active electrode, the second active electrode of the power receiving device, and the second passive electrode of the power receiving device. A power transmission device that is arranged.
PCT/JP2012/075362 2011-10-03 2012-10-01 Power transmission system and power transmitting device WO2013051501A1 (en)

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WO2017002842A1 (en) * 2015-06-29 2017-01-05 株式会社ＥｘＨ Electrical power transmission system
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CN105190327A (en) * 2013-06-06 2015-12-23 株式会社村田制作所 Inspection device and inspection method for contactless electric power transmission system
WO2017002842A1 (en) * 2015-06-29 2017-01-05 株式会社ＥｘＨ Electrical power transmission system
WO2017022860A1 (en) * 2015-08-05 2017-02-09 株式会社ＥｘＨ Electric power transmitting system

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