JP2015104151A - Power feeding apparatus - Google Patents

Power feeding apparatus Download PDF

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JP2015104151A
JP2015104151A JP2013240851A JP2013240851A JP2015104151A JP 2015104151 A JP2015104151 A JP 2015104151A JP 2013240851 A JP2013240851 A JP 2013240851A JP 2013240851 A JP2013240851 A JP 2013240851A JP 2015104151 A JP2015104151 A JP 2015104151A
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power
power transmission
electromagnetic shield
medium
power receiving
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寛之 高辻
Hiroyuki Takatsuji
寛之 高辻
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Murata Manufacturing Co Ltd
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Murata Manufacturing Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a power feeding apparatus capable of suppressing occurrence of electromagnetic noise.SOLUTION: A power transmission device includes a power transmission medium and a power transmission side electromagnetic shield for electromagnetically shielding the power transmission medium. A power receiving device includes a power receiving medium and a power receiving side electromagnetic shield for electromagnetically shielding the power receiving medium. The power transmission side electromagnetic shield and the power receiving side electromagnetic shield respectively include a power transmission side aperture and a power receiving side aperture. When the power transmission device and the power receiving device are arranged in an operation state so that the power transmission medium and the power receiving medium are electrically or magnetically connected to each other, electric power is supplied from the power transmission medium to the power receiving medium. In the operation state, the power transmission side aperture is opposed to the power receiving medium, the power receiving side aperture is opposed to the power transmission medium, the power receiving side electromagnetic shield is electrically connected to the power transmission side electromagnetic shield, both the electromagnetic shields are set to the same potential, and a peripheral edge portion of the power receiving side aperture is brought into contact with a peripheral edge portion of the power transmission side aperture over the whole length in a peripheral direction or opposed to the peripheral edge portion of the power transmission side aperture through a gap of 1/10 or less of the shortest distance between the power transmission medium and the power receiving medium.

Description

本発明は、送電装置の送電媒体と受電装置の受電媒体とが非接触の状態で、送電装置から受電装置に電力を伝送する給電装置に関する。   The present invention relates to a power feeding device that transmits power from a power transmitting device to a power receiving device in a state where the power transmitting medium of the power transmitting device and the power receiving medium of the power receiving device are not in contact with each other.

送電装置と受電装置とを近接させて電力を伝送する方式として、電磁誘導方式、磁界共鳴方式、電界結合方式等が知られている。特許文献１に、送電媒体（コイル）を送電側電磁シールドで覆い、受電媒体（コイル）を受電側電磁シールドで覆うことにより、電磁界ノイズを遮蔽した給電装置が開示されている。給電中は、受電側電磁シールドと送電側電磁シールドとが電気的に接続され、両者が同電位に保たれる。これにより、電位差に起因する電界発生が防止される。   As a method for transmitting power by bringing a power transmitting device and a power receiving device close to each other, an electromagnetic induction method, a magnetic field resonance method, an electric field coupling method, and the like are known. Patent Document 1 discloses a power feeding device that shields electromagnetic field noise by covering a power transmission medium (coil) with a power transmission side electromagnetic shield and covering a power reception medium (coil) with a power reception side electromagnetic shield. During power feeding, the power reception side electromagnetic shield and the power transmission side electromagnetic shield are electrically connected, and both are kept at the same potential. As a result, the generation of an electric field due to the potential difference is prevented.

特開２０１２−２２８１４８号公報JP 2012-228148 A

受電側電磁シールドと送電側電磁シールドとが電気的に接続されるが、接続箇所以外の部分には、受電側電磁シールドと送電側電磁シールドとの間に隙間が形成される。この隙間から電磁界が漏れることにより、種々のノイズ問題が発生する場合がある。本発明の目的は、電磁ノイズの発生を抑制することができる給電装置を提供することである。   The power reception side electromagnetic shield and the power transmission side electromagnetic shield are electrically connected, but a gap is formed between the power reception side electromagnetic shield and the power transmission side electromagnetic shield at a portion other than the connection location. Various noise problems may occur due to leakage of electromagnetic fields from the gap. The objective of this invention is providing the electric power feeder which can suppress generation | occurrence | production of electromagnetic noise.

本発明の一観点によると、
送電媒体、及び前記送電媒体を電磁シールドする送電側電磁シールドを含む送電装置と、
受電媒体及び前記受電媒体を電磁シールドする受電側電磁シールドを含む受電装置と
を有し、
前記送電側電磁シールド及び前記受電側電磁シールドが、それぞれ送電側開口部及び受電側開口部を有し、
前記送電装置に対して前記受電装置を、前記送電媒体と前記受電媒体とが電気的または磁気的に結合するように配置して動作状態とすることにより、前記送電媒体から前記受電媒体に電力が供給され、
前記動作状態のとき、前記送電側開口部が前記受電媒体に対向し、前記受電側開口部が前記送電媒体に対向し、前記受電側電磁シールドが前記送電側電磁シールドに電気的に接続されて両者が同電位にされ、前記受電側開口部の周縁部が、周方向の全長に亘って、前記送電側開口部の周縁部に接触するか、または前記送電媒体と前記受電媒体との最短距離の１／１０以下の間隙を隔てて対向する給電装置が提供される。 According to one aspect of the invention,
A power transmission device including a power transmission medium, and a power transmission side electromagnetic shield that electromagnetically shields the power transmission medium;
A power receiving device including a power receiving medium and a power receiving side electromagnetic shield that electromagnetically shields the power receiving medium;
The power transmission side electromagnetic shield and the power reception side electromagnetic shield have a power transmission side opening and a power reception side opening, respectively.
By placing the power receiving device with respect to the power transmitting device so that the power transmitting medium and the power receiving medium are electrically or magnetically coupled to each other, the power is transmitted from the power transmitting medium to the power receiving medium. Supplied,
In the operation state, the power transmission side opening is opposed to the power reception medium, the power reception side opening is opposed to the power transmission medium, and the power reception side electromagnetic shield is electrically connected to the power transmission side electromagnetic shield. Both are set to the same potential, and the peripheral edge of the power receiving side opening is in contact with the peripheral edge of the power transmission side opening over the entire length in the circumferential direction, or the shortest distance between the power transmission medium and the power receiving medium A power supply device is provided which is opposed to each other with a gap of 1/10 or less of the above.

受電側開口部の周縁部が、周方向の全長に亘って、送電側開口部の周縁部に接触するか、または送電媒体と受電媒体との最短距離の１／１０以下の間隙を隔てて対向することにより、電磁ノイズの遮蔽効果を高めることができる。   The peripheral edge of the power receiving side opening is in contact with the peripheral edge of the power transmission side opening over the entire length in the circumferential direction, or opposed with a gap of 1/10 or less of the shortest distance between the power transmission medium and the power receiving medium. By doing so, the shielding effect of electromagnetic noise can be enhanced.

前記送電装置が、さらに送電回路基板を含み、前記送電側電磁シールドが前記送電回路基板のグランド導体に接続されている構成としてもよい。   The power transmission device may further include a power transmission circuit board, and the power transmission side electromagnetic shield may be connected to a ground conductor of the power transmission circuit board.

前記送電側開口部の周縁部、及び前記受電側開口部の周縁部に鍔部が設けられており、前記動作状態のとき、前記送電側開口部の周縁部と、前記受電側開口部の周縁部との鍔部同士が対向する構成としてもよい。鍔部を設けることにより、受電側電磁シールドと送電側電磁シールドとの接触面積を大きくすることができる。   A flange is provided at the peripheral edge of the power transmission side opening and the peripheral edge of the power reception side opening, and in the operation state, the peripheral edge of the power transmission side opening and the periphery of the power reception side opening It is good also as a structure where the collar parts with a part oppose. By providing the collar portion, the contact area between the power reception side electromagnetic shield and the power transmission side electromagnetic shield can be increased.

前記送電側電磁シールド及び前記受電側電磁シールドの、相互に対向する表面の一方に凹部が形成されており、他方に凸部が形成されており、前記動作状態のとき、前記凸部が前記凹部に嵌入される構成としてもよい。凸部を凹部に嵌入させることにより、受電側電磁シールドと送電側電磁シールドとの位置合わせを容易に行うことができる。   The power transmission side electromagnetic shield and the power reception side electromagnetic shield have a concave portion formed on one of the mutually opposing surfaces, and a convex portion is formed on the other surface. When in the operation state, the convex portion is the concave portion. It is good also as a structure inserted by. By fitting the convex portion into the concave portion, it is possible to easily align the power receiving side electromagnetic shield and the power transmitting side electromagnetic shield.

前記受電装置が、さらに導電性の筐体を持つ蓄電装置を含み、前記蓄電装置の筐体が、前記受電側電磁シールドの一部分を兼ねる構成としてもよい。   The power receiving device may further include a power storage device having a conductive housing, and the housing of the power storage device may also serve as a part of the power receiving side electromagnetic shield.

受電側開口部の周縁部が、周方向の全長に亘って、送電側開口部の周縁部に接触するか、または送電媒体と受電媒体との最短距離の１／１０以下の間隙を隔てて対向することにより、電磁ノイズの遮蔽効果を高めることができる。   The peripheral edge of the power receiving side opening is in contact with the peripheral edge of the power transmission side opening over the entire length in the circumferential direction, or opposed with a gap of 1/10 or less of the shortest distance between the power transmission medium and the power receiving medium. By doing so, the shielding effect of electromagnetic noise can be enhanced.

図１Ａ及び図１Ｂは、それぞれ実施例１による受電装置の断面図及び底面図である。1A and 1B are a cross-sectional view and a bottom view of the power receiving device according to the first embodiment, respectively. 図２Ａ及び図２Ｂは、それぞれ実施例１による送電装置の断面図及び平面図である。2A and 2B are a cross-sectional view and a plan view of the power transmission device according to the first embodiment, respectively. 図３は、実施例１による給電装置の断面図である。FIG. 3 is a cross-sectional view of the power feeding apparatus according to the first embodiment. 図４Ａは、受電側電磁シールドと送電側電磁シールドとが周方向の一部分のみで接触する構造を有する給電装置から生じる電磁ノイズのスペクトルを示すグラフであり、図４Ｂは、実施例１による給電装置から生じる電磁ノイズのスペクトルを示すグラフである。FIG. 4A is a graph illustrating a spectrum of electromagnetic noise generated from a power feeding device having a structure in which the power receiving side electromagnetic shield and the power transmitting side electromagnetic shield are in contact with each other only in a part in the circumferential direction, and FIG. 4B is a power feeding device according to the first embodiment. It is a graph which shows the spectrum of the electromagnetic noise resulting from. 図５は、実施例２による給電装置の断面図である。FIG. 5 is a cross-sectional view of the power feeding apparatus according to the second embodiment. 図６は、実施例３による給電装置の断面図である。FIG. 6 is a cross-sectional view of the power feeding apparatus according to the third embodiment. 図７Ａは、実施例４による送電装置の平面図であり、図７Ｂは、実施例４による給電装置の断面図である。7A is a plan view of the power transmission device according to the fourth embodiment, and FIG. 7B is a cross-sectional view of the power feeding device according to the fourth embodiment. 図８は、実施例５による給電装置の断面図である。FIG. 8 is a cross-sectional view of the power feeding apparatus according to the fifth embodiment.

［実施例１］
図１Ａ〜図４Ｂを参照して、実施例１による給電装置について説明する。この給電装置は、送電装置と受電装置とを含み、電磁誘導方式により電力が伝送される。 [Example 1]
With reference to FIG. 1A-FIG. 4B, the electric power feeder by Example 1 is demonstrated. The power supply device includes a power transmission device and a power reception device, and transmits power by an electromagnetic induction method.

図１Ａ及び図１Ｂに、それぞれ受電装置１０の断面図及び底面図を示す。図１Ａは、図１Ｂの一点鎖線１Ａ−１Ａにおける断面図に相当する。受電装置１０は、例えばスマートフォン等の携帯情報端末である。   1A and 1B are a cross-sectional view and a bottom view of the power receiving device 10, respectively. 1A corresponds to a cross-sectional view taken along one-dot chain line 1A-1A in FIG. 1B. The power receiving device 10 is a portable information terminal such as a smartphone.

受電装置１０は、受電媒体１１、受電側電磁シールド１２、及び筐体２４を含む。受電媒体１１にはコイルが用いられる。受電側電磁シールド１２には、導電性材料、例えば銅等の金属が用いられる。筐体２４には、例えば樹脂が用いられる。   The power receiving device 10 includes a power receiving medium 11, a power receiving side electromagnetic shield 12, and a housing 24. A coil is used as the power receiving medium 11. The power receiving side electromagnetic shield 12 is made of a conductive material, for example, a metal such as copper. For the housing 24, for example, a resin is used.

受電媒体１１の上方及び側方が、受電側電磁シールド１２で覆われている。受電側電磁シールド１２は筐体２４に取り付けられており、下方（筐体２４の外側）に向かう受電側開口部１４を有する。受電側開口部１４の周縁部に鍔部１３が設けられている。鍔部１３
は、受電側開口部１４の縁から外側に向かって張り出している。 The upper side and the side of the power receiving medium 11 are covered with the power receiving side electromagnetic shield 12. The power receiving side electromagnetic shield 12 is attached to the casing 24 and has a power receiving side opening 14 directed downward (outside the casing 24). A flange 13 is provided at the peripheral edge of the power receiving side opening 14. Buttock 13
Projecting outward from the edge of the power receiving side opening 14.

筐体２４内に、受電回路基板１９、二次電池２１、及び機能回路基板２３が収容されている。受電媒体１１が配線１８により受電回路基板１９に接続されている。配線１８は、受電側電磁シールド１２に設けられた貫通孔１５を貫通して、筐体２４の外部から内部に導入されている。   A power receiving circuit board 19, a secondary battery 21, and a functional circuit board 23 are accommodated in the housing 24. The power receiving medium 11 is connected to the power receiving circuit board 19 by wiring 18. The wiring 18 passes through the through hole 15 provided in the power receiving side electromagnetic shield 12 and is introduced from the outside of the housing 24 to the inside.

受電回路基板１９が配線２０により二次電池２１に接続されている。二次電池２１は、配線２２により機能回路基板２３に接続されている。機能回路基板２３に、携帯情報端末の種々の機能を実現するための電子回路が実装されている。受電媒体１１で受信された電力によって二次電池２１が充電される。二次電池２１からの電力によって、機能回路基板２３に実装されている電子回路が動作する。   The power receiving circuit board 19 is connected to the secondary battery 21 by the wiring 20. The secondary battery 21 is connected to the functional circuit board 23 by wiring 22. An electronic circuit for realizing various functions of the portable information terminal is mounted on the functional circuit board 23. The secondary battery 21 is charged by the power received by the power receiving medium 11. The electronic circuit mounted on the functional circuit board 23 is operated by the power from the secondary battery 21.

図２Ａ及び図２Ｂに、それぞれ送電装置の断面図及び平面図を示す。図２Ａは、図２Ｂの一点鎖線２Ａ−２Ａにおける断面図に相当する。   2A and 2B are a cross-sectional view and a plan view of the power transmission device, respectively. 2A corresponds to a cross-sectional view taken along one-dot chain line 2A-2A in FIG. 2B.

送電装置３０は、送電媒体３１、送電側電磁シールド３２、及び筐体４５を含む。送電媒体３１の下方及び側方が、送電側電磁シールド３２で覆われている。送電側電磁シールド３２は筐体４５に取り付けられており、上方（筐体４５の外側）に向かう送電側開口部３４を有する。送電側開口部３４の周縁部に鍔部３３が設けられている。鍔部３３は、送電側開口部３４の縁から外側に向かって張り出している。   The power transmission device 30 includes a power transmission medium 31, a power transmission side electromagnetic shield 32, and a housing 45. A lower side and a side of the power transmission medium 31 are covered with a power transmission side electromagnetic shield 32. The power transmission side electromagnetic shield 32 is attached to the housing 45 and has a power transmission side opening 34 directed upward (outside the housing 45). A flange 33 is provided at the peripheral edge of the power transmission side opening 34. The flange 33 projects outward from the edge of the power transmission side opening 34.

筐体４５内に送電回路基板３９が収容されている。送電媒体３１が配線３８により送電回路基板３９に接続されている。配線３８は、送電側電磁シールド３２に設けられた貫通孔３５を通って、筐体４５の外部から内部に導入されている。送電側電磁シールド３２は、配線４１により、送電回路基板３９のグランド導体４０に接続されている。送電回路基板３９に実装されている送電回路は、電源ケーブル４２を介して商用電源等に接続される。   A power transmission circuit board 39 is accommodated in the housing 45. The power transmission medium 31 is connected to the power transmission circuit board 39 by wiring 38. The wiring 38 is introduced from the outside to the inside of the housing 45 through the through hole 35 provided in the power transmission side electromagnetic shield 32. The power transmission side electromagnetic shield 32 is connected to the ground conductor 40 of the power transmission circuit board 39 by a wiring 41. The power transmission circuit mounted on the power transmission circuit board 39 is connected to a commercial power source or the like via the power cable 42.

送電媒体３１にはコイルが用いられる。送電側電磁シールド３２には、導電性材料、例えば銅等の金属が用いられる。筐体４５には、例えば樹脂が用いられる。   A coil is used for the power transmission medium 31. The power transmission side electromagnetic shield 32 is made of a conductive material, for example, a metal such as copper. For the housing 45, for example, a resin is used.

図３に、給電装置が動作状態、すなわち送電装置３０から受電装置１０に電力が送電されている状態のときの受電装置１０及び送電装置３０の相対位置関係を示す。送電側電磁シールド３２が、送電側開口部３４を受電媒体１１に向け、受電側電磁シールド１２が、受電側開口部１４を送電媒体３１に向けている。受電側開口部１４の周縁部が、周方向の全長に亘って送電側開口部３４の周縁部に接触している。これにより、受電側電磁シールド１２と送電側電磁シールド３２とが電気的に接続され、両者が同電位に保たれる。受電側電磁シールド１２及び送電側電磁シールド３２に、それぞれ鍔部１３、３３が設けられているため、両者の接触面積を大きくすることができる。   FIG. 3 shows a relative positional relationship between the power receiving device 10 and the power transmitting device 30 when the power feeding device is in an operating state, that is, when power is being transmitted from the power transmitting device 30 to the power receiving device 10. The power transmission side electromagnetic shield 32 directs the power transmission side opening 34 toward the power reception medium 11, and the power reception side electromagnetic shield 12 points the power reception side opening 14 toward the power transmission medium 31. The periphery of the power receiving side opening 14 is in contact with the periphery of the power transmission side opening 34 over the entire length in the circumferential direction. Thereby, the power reception side electromagnetic shield 12 and the power transmission side electromagnetic shield 32 are electrically connected, and both are kept at the same potential. Since the power receiving side electromagnetic shield 12 and the power transmission side electromagnetic shield 32 are provided with the flange portions 13 and 33, respectively, the contact area between them can be increased.

動作状態のとき、受電媒体１１と送電媒体３１とが、間隔を隔てて対向し、磁気的に結合する。これにより、送電媒体３１から受電媒体１１に電力が伝送される。   In the operating state, the power receiving medium 11 and the power transmitting medium 31 face each other with a gap therebetween and are magnetically coupled. As a result, power is transmitted from the power transmission medium 31 to the power reception medium 11.

図４Ａ及び図４Ｂを参照して、受電側電磁シールド１２と送電側電磁シールド３２とが、周方向の全長に亘って接触している構造の効果について説明する。図４Ａ及び図４Ｂは、給電装置から放射された電磁ノイズのスペクトルを示す。縦軸はノイズレベルを単位「ｄＢμＶ／ｍ」で表し、横軸は周波数を単位「ＭＨｚ」で表す。図４Ａは、受電側電磁シールド１２と送電側電磁シールド３２とを、周方向の一部分のみで接触させた場合の電磁ノイズを示し、図４Ｂは、図３に示した実施例１による構造の電磁ノイズを示す。送電媒
体３１に供給する交流電力の周波数は約１００ｋＨｚである。また、図４Ａの構造において、受電側電磁シールド１２と送電側電磁シールド３２との、相互に接触していない部分の間隔は、約５ｍｍである。 With reference to FIG. 4A and FIG. 4B, the effect of the structure where the receiving side electromagnetic shield 12 and the power transmission side electromagnetic shield 32 are contacting over the full length of the circumferential direction is demonstrated. 4A and 4B show the spectrum of electromagnetic noise radiated from the power feeding device. The vertical axis represents the noise level in the unit “dBμV / m”, and the horizontal axis represents the frequency in the unit “MHz”. 4A shows electromagnetic noise when the power receiving side electromagnetic shield 12 and the power transmitting side electromagnetic shield 32 are brought into contact with each other only in a part in the circumferential direction, and FIG. 4B shows electromagnetic waves having a structure according to the first embodiment shown in FIG. Indicates noise. The frequency of AC power supplied to the power transmission medium 31 is about 100 kHz. In the structure of FIG. 4A, the interval between the portions of the power reception side electromagnetic shield 12 and the power transmission side electromagnetic shield 32 that are not in contact with each other is about 5 mm.

図４Ａと図４Ｂとを比較すると、実施例１の構造を採用することにより、約２１０ｋＨｚ以外のピークが低減されていることがわかる。このように、受電側電磁シールド１２と送電側電磁シールド３２とを、周方向の全域において接触させることにより、電磁ノイズを遮蔽する効果を高めることができる。   Comparing FIG. 4A and FIG. 4B, it can be seen that peaks other than about 210 kHz are reduced by adopting the structure of Example 1. Thus, the effect of shielding electromagnetic noise can be enhanced by bringing the power reception side electromagnetic shield 12 and the power transmission side electromagnetic shield 32 into contact with each other in the entire circumferential direction.

［実施例２］
図５を参照して、実施例２による給電装置について説明する。以下の説明では、実施例１との相違点に着目し、実施例１と同一の構成については説明を省略する。 [Example 2]
With reference to FIG. 5, the electric power feeder by Example 2 is demonstrated. In the following description, paying attention to differences from the first embodiment, the description of the same configuration as the first embodiment is omitted.

図５は、実施例２による給電装置の断面図を示す。実施例１では、図３に示したように、受電側電磁シールド１２と送電側電磁シールド３２とが相互に接触する面（以下、対向面という。）が平坦であった。実施例２では、受電側電磁シールド１２の対向面及び送電側電磁シールド３２の対向面に、それぞれ凹部１６及び凸部３６が形成されている。動作状態においては、凸部３６が凹部１６に嵌入される。   FIG. 5 is a cross-sectional view of the power feeding apparatus according to the second embodiment. In Example 1, as shown in FIG. 3, the surface where the power receiving side electromagnetic shield 12 and the power transmitting side electromagnetic shield 32 contact each other (hereinafter referred to as an opposing surface) was flat. In Example 2, the recessed part 16 and the convex part 36 are formed in the opposing surface of the power receiving side electromagnetic shield 12 and the opposing surface of the power transmission side electromagnetic shield 32, respectively. In the operating state, the convex portion 36 is fitted into the concave portion 16.

実施例２では、凸部３６を凹部１６に嵌入させることにより受電装置１０と送電装置３０との位置ずれを防止することができる。凹部１６は、周方向に連続する溝で構成してもよいし、周方向に離散的に分布する複数の穴で構成してもよい。凹部１６が溝で構成される場合には、凸部３６は周方向に連続する尾根状の形状を有する。凹部１６が複数の穴で構成される場合には、凸部３６は、複数の突起で構成される。   In the second embodiment, it is possible to prevent the positional deviation between the power receiving device 10 and the power transmitting device 30 by fitting the convex portion 36 into the concave portion 16. The recessed part 16 may be comprised by the groove | channel which continues in the circumferential direction, and may be comprised by the some hole distributed discretely in the circumferential direction. When the recessed part 16 is comprised with a groove | channel, the convex part 36 has a ridge shape continuous in the circumferential direction. In the case where the concave portion 16 is composed of a plurality of holes, the convex portion 36 is composed of a plurality of protrusions.

図５では、受電側電磁シールド１２に凹部１６を形成し、送電側電磁シールド３２に凸部３６を形成したが、その反対に、受電側電磁シールド１２に凸部３６を形成し、送電側電磁シールド３２に凹部１６を形成してもよい。   In FIG. 5, the concave portion 16 is formed in the power receiving side electromagnetic shield 12 and the convex portion 36 is formed in the power transmitting side electromagnetic shield 32, but conversely, the convex portion 36 is formed in the power receiving side electromagnetic shield 12, The recess 16 may be formed in the shield 32.

［実施例３］
図６を参照して、実施例３による給電装置について説明する。以下の説明では、実施例１との相違点に着目し、実施例１と同一の構成については説明を省略する。 [Example 3]
With reference to FIG. 6, the electric power feeder by Example 3 is demonstrated. In the following description, paying attention to differences from the first embodiment, the description of the same configuration as the first embodiment is omitted.

実施例３では、受電回路基板１９及び二次電池２１が金属製の筐体５１に収容されて、蓄電装置５０を構成する。受電媒体１１が、蓄電装置５０の受電回路基板１９に接続されている。蓄電装置５０の二次電池２１が、機能回路基板２３に接続されている。金属製の筐体５１が、受電側電磁シールド１２の一部分を兼ねている。   In the third embodiment, the power receiving circuit board 19 and the secondary battery 21 are accommodated in a metal casing 51 to constitute the power storage device 50. The power receiving medium 11 is connected to the power receiving circuit board 19 of the power storage device 50. The secondary battery 21 of the power storage device 50 is connected to the functional circuit board 23. The metal casing 51 also serves as a part of the power reception side electromagnetic shield 12.

実施例３のように、蓄電装置５０の金属製の筐体５１を、受電側電磁シールド１２の一部分として利用してもよい。   As in the third embodiment, the metal casing 51 of the power storage device 50 may be used as a part of the power receiving side electromagnetic shield 12.

［実施例４］
図７Ａ及び図７Ｂを参照して、実施例４による給電装置について説明する。以下の説明では、実施例１との相違点に着目し、実施例１と同一の構成については説明を省略する。 [Example 4]
With reference to FIG. 7A and 7B, the electric power feeder by Example 4 is demonstrated. In the following description, paying attention to differences from the first embodiment, the description of the same configuration as the first embodiment is omitted.

実施例１では、図３に示したように、受電側電磁シールド１２と送電側電磁シールド３２とが、周方向の全長に亘って接触していた。実施例４では、受電側電磁シールド１２と送電側電磁シールド３２とが、周方向の一部分においてのみ接触しており、他の部分においては、間隙を隔てて相互に対向している。   In the first embodiment, as illustrated in FIG. 3, the power reception side electromagnetic shield 12 and the power transmission side electromagnetic shield 32 are in contact with each other over the entire length in the circumferential direction. In the fourth embodiment, the power reception side electromagnetic shield 12 and the power transmission side electromagnetic shield 32 are in contact with each other only in a part in the circumferential direction, and in other parts, they are opposed to each other with a gap.

図７Ａに、実施例４による送電装置３０の平面図を示す。送電側電磁シールド３２の、受電装置１０に対向する表面に、複数の突起３７が形成されている。突起３７は、周方向に離散的に配置されている。受電側電磁シールド１２の、送電装置３０に対向する表面（以下、対向面という。）は、実施例１と同様に平坦である。   FIG. 7A is a plan view of the power transmission device 30 according to the fourth embodiment. A plurality of protrusions 37 are formed on the surface of the power transmission side electromagnetic shield 32 facing the power receiving device 10. The protrusions 37 are discretely arranged in the circumferential direction. The surface of the power receiving side electromagnetic shield 12 facing the power transmission device 30 (hereinafter referred to as the facing surface) is flat as in the first embodiment.

図７Ｂに、実施例４による給電装置の断面図を示す。動作状態のとき、送電側電磁シールド３２の突起３７の先端が、受電側電磁シールド１２の対向面に接触する。これにより、受電側電磁シールド１２が送電側電磁シールド３２に電気的に接続される。突起３７が形成されていない部分においては、受電側電磁シールド１２と送電側電磁シールド３２とが、間隙を隔てて対向する。   FIG. 7B is a cross-sectional view of the power feeding device according to the fourth embodiment. In the operating state, the tip of the protrusion 37 of the power transmission side electromagnetic shield 32 contacts the facing surface of the power reception side electromagnetic shield 12. Thereby, the power reception side electromagnetic shield 12 is electrically connected to the power transmission side electromagnetic shield 32. In the part where the protrusion 37 is not formed, the power reception side electromagnetic shield 12 and the power transmission side electromagnetic shield 32 face each other with a gap therebetween.

受電側電磁シールド１２と送電側電磁シールド３２との間に間隙が形成されている場合であっても、受電側電磁シールド１２と送電側電磁シールド３２との間隔が十分狭ければ、電磁ノイズの放射を抑制することができる。例えば、動作状態において、受電側電磁シールド１２と送電側電磁シールド３２との間隔の最大値ＧＢが、受電媒体１１と送電媒体３１との最短距離ＧＡの１／１０以下であれば、十分な電磁ノイズ抑制効果が得られる。   Even when a gap is formed between the power reception side electromagnetic shield 12 and the power transmission side electromagnetic shield 32, if the interval between the power reception side electromagnetic shield 12 and the power transmission side electromagnetic shield 32 is sufficiently narrow, electromagnetic noise Radiation can be suppressed. For example, when the maximum value GB of the distance between the power reception side electromagnetic shield 12 and the power transmission side electromagnetic shield 32 is 1/10 or less of the shortest distance GA between the power reception medium 11 and the power transmission medium 31 in the operating state, sufficient electromagnetic force is obtained. Noise suppression effect can be obtained.

［実施例５］
図８を参照して、実施例５による給電装置について説明する。以下の説明では、実施例１との相違点に着目し、実施例１と同一の構成については説明を省略する。 [Example 5]
With reference to FIG. 8, the electric power feeder by Example 5 is demonstrated. In the following description, paying attention to differences from the first embodiment, the description of the same configuration as the first embodiment is omitted.

実施例１〜４による給電装置では、電磁誘導方式が採用されていたが、上記実施例１〜４に示した技術的思想は、他のワイヤレス給電方式、例えば磁界共鳴方式、電界結合方式等の給電装置にも適用可能である。   In the power feeding devices according to the first to fourth embodiments, the electromagnetic induction method has been adopted. However, the technical ideas shown in the first to fourth embodiments are based on other wireless power feeding methods such as a magnetic field resonance method and an electric field coupling method. The present invention can also be applied to a power feeding device.

図８に示した実施例５による給電装置では、電界結合方式が採用されている。電界結合方式においては、受電媒体１１が受電側アクティブ電極として作用し、送電媒体３１が送電側アクティブ電極として作用する。受電側電磁シールド１２及び送電側電磁シールド３２が、それぞれ受電側パッシブ電極及び送電側パッシブ電極として作用する。受電側アクティブ電極、受電側パッシブ電極、送電側アクティブ電極、及び送電側パッシブ電極が電気的に結合することにより、送電側アクティブ電極から受電側アクティブ電極に電力が伝送される。   In the power supply apparatus according to the fifth embodiment illustrated in FIG. 8, the electric field coupling method is employed. In the electric field coupling method, the power reception medium 11 functions as a power reception side active electrode, and the power transmission medium 31 functions as a power transmission side active electrode. The power reception side electromagnetic shield 12 and the power transmission side electromagnetic shield 32 act as a power reception side passive electrode and a power transmission side passive electrode, respectively. Power is transmitted from the power transmission side active electrode to the power reception side active electrode by electrically coupling the power reception side active electrode, the power reception side passive electrode, the power transmission side active electrode, and the power transmission side passive electrode.

受電媒体１１及び受電側電磁シールド１２に、受電回路基板１９に実装された受電回路が接続されている。送電回路基板３９に実装された送電回路が、送電媒体３１及び送電側電磁シールド３２に接続されている。   A power receiving circuit mounted on a power receiving circuit board 19 is connected to the power receiving medium 11 and the power receiving side electromagnetic shield 12. A power transmission circuit mounted on the power transmission circuit board 39 is connected to the power transmission medium 31 and the power transmission side electromagnetic shield 32.

実施例５のように、電界結合方式の給電装置においても、送電側電磁シールド３２と受電側電磁シールド１２とを、周方向の全域において接触させることにより、電磁ノイズの放射を抑制することができる。   As in the fifth embodiment, even in an electric field coupling type power feeding device, radiation of electromagnetic noise can be suppressed by bringing the power transmission side electromagnetic shield 32 and the power reception side electromagnetic shield 12 into contact with each other in the entire circumferential direction. .

以上実施例に沿って本発明を説明したが、本発明はこれらに制限されるものではない。例えば、種々の変更、改良、組み合わせ等が可能なことは当業者に自明であろう。   Although the present invention has been described with reference to the embodiments, the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications, improvements, combinations, and the like can be made.

１０ 受電装置
１１ 受電媒体
１２ 受電側電磁シールド
１３ 鍔部
１４ 受電側開口部
１５ 貫通孔
１６ 凹部
１８ 配線
１９ 受電回路基板
２０ 配線
２１ 二次電池
２２ 配線
２３ 機能回路基板
２４ 筐体
３０ 送電装置
３１ 送電媒体
３２ 送電側電磁シールド
３３ 鍔部
３４ 送電側開口部
３５ 貫通孔
３６ 凸部
３７ 突起
３８ 配線
３９ 送電回路基板
４０ グランド導体
４１ 配線
４２ 電源ケーブル
４５ 筐体
５０ 蓄電装置
５１ 筐体 DESCRIPTION OF SYMBOLS 10 Power receiving apparatus 11 Power receiving medium 12 Power receiving side electromagnetic shield 13 ridge part 14 Power receiving side opening 15 Through-hole 16 Recess 18 Wiring 19 Power receiving circuit board 20 Wiring 21 Secondary battery 22 Wiring 23 Functional circuit board 24 Case 30 Power transmitting apparatus 31 Power transmission Medium 32 Power transmission side electromagnetic shield 33 Hook 34 Power transmission side opening 35 Through hole 36 Protrusion 37 Projection 38 Wiring 39 Power transmission circuit board 40 Ground conductor 41 Wiring 42 Power cable 45 Housing 50 Power storage device 51 Housing

Claims (5)

送電媒体、及び前記送電媒体を電磁シールドする送電側電磁シールドを含む送電装置と、
受電媒体及び前記受電媒体を電磁シールドする受電側電磁シールドを含む受電装置と
を有し、
前記送電側電磁シールド及び前記受電側電磁シールドが、それぞれ送電側開口部及び受電側開口部を有し、
前記送電装置に対して前記受電装置を、前記送電媒体と前記受電媒体とが電気的または磁気的に結合するように配置して動作状態とすることにより、前記送電媒体から前記受電媒体に電力が供給され、
前記動作状態のとき、前記送電側開口部が前記受電媒体に対向し、前記受電側開口部が前記送電媒体に対向し、前記受電側電磁シールドが前記送電側電磁シールドに電気的に接続されて両者が同電位にされ、前記受電側開口部の周縁部が、周方向の全長に亘って、前記送電側開口部の周縁部に接触するか、または前記送電媒体と前記受電媒体との最短距離の１／１０以下の間隙を隔てて対向する給電装置。 A power transmission device including a power transmission medium, and a power transmission side electromagnetic shield that electromagnetically shields the power transmission medium;
A power receiving device including a power receiving medium and a power receiving side electromagnetic shield that electromagnetically shields the power receiving medium;
The power transmission side electromagnetic shield and the power reception side electromagnetic shield have a power transmission side opening and a power reception side opening, respectively.
By placing the power receiving device with respect to the power transmitting device so that the power transmitting medium and the power receiving medium are electrically or magnetically coupled to each other, the power is transmitted from the power transmitting medium to the power receiving medium. Supplied,
In the operation state, the power transmission side opening is opposed to the power reception medium, the power reception side opening is opposed to the power transmission medium, and the power reception side electromagnetic shield is electrically connected to the power transmission side electromagnetic shield. Both are set to the same potential, and the peripheral edge of the power receiving side opening is in contact with the peripheral edge of the power transmission side opening over the entire length in the circumferential direction, or the shortest distance between the power transmission medium and the power receiving medium A power feeding device that is opposed to each other with a gap of 1/10 or less. 前記送電装置は、さらに送電回路基板を含み、前記送電側電磁シールドが前記送電回路基板のグランド導体に接続されている請求項１に記載の給電装置。   The power feeding device according to claim 1, wherein the power transmission device further includes a power transmission circuit board, and the power transmission side electromagnetic shield is connected to a ground conductor of the power transmission circuit board. 前記送電側開口部の周縁部、及び前記受電側開口部の周縁部に鍔部が設けられており、
前記動作状態のとき、前記送電側開口部の周縁部と、前記受電側開口部の周縁部との鍔部同士が対向する請求項１または２に記載の給電装置。 A flange is provided on the peripheral edge of the power transmission side opening and the peripheral edge of the power reception side opening,
3. The power feeding device according to claim 1, wherein, in the operation state, flanges of a peripheral edge portion of the power transmission side opening portion and a peripheral edge portion of the power reception side opening portion face each other. 前記送電側電磁シールド及び前記受電側電磁シールドの、相互に対向する表面の一方に凹部が形成されており、他方に凸部が形成されており、前記動作状態のとき、前記凸部が前記凹部に嵌入される請求項１乃至３のいずれか１項に記載の給電装置。   The power transmission side electromagnetic shield and the power reception side electromagnetic shield have a concave portion formed on one of the mutually opposing surfaces, and a convex portion is formed on the other surface. When in the operation state, the convex portion is the concave portion. The power feeding device according to any one of claims 1 to 3, wherein the power feeding device is inserted into the power feeding device. 前記受電装置が、さらに導電性の筐体を持つ蓄電装置を含み、
前記蓄電装置の筐体が、前記受電側電磁シールドの一部分を兼ねる請求項１乃至４のいずれか１項に記載の給電装置。 The power receiving device further includes a power storage device having a conductive casing,
The power feeding device according to claim 1, wherein a housing of the power storage device also serves as a part of the power reception side electromagnetic shield.
JP2013240851A 2013-11-21 2013-11-21 Power feeding apparatus Pending JP2015104151A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017195443A1 (en) * 2016-05-10 2017-11-16 ヤマハ発動機株式会社 Power reception device, vehicle, and saddle-riding-type vehicle
JP2018082595A (en) * 2016-11-18 2018-05-24 トヨタ自動車株式会社 Coil unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017195443A1 (en) * 2016-05-10 2017-11-16 ヤマハ発動機株式会社 Power reception device, vehicle, and saddle-riding-type vehicle
JP2018082595A (en) * 2016-11-18 2018-05-24 トヨタ自動車株式会社 Coil unit

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