JP2013085351A - Non-contact power transmission device - Google Patents

Non-contact power transmission device Download PDF

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JP2013085351A
JP2013085351A JP2011222797A JP2011222797A JP2013085351A JP 2013085351 A JP2013085351 A JP 2013085351A JP 2011222797 A JP2011222797 A JP 2011222797A JP 2011222797 A JP2011222797 A JP 2011222797A JP 2013085351 A JP2013085351 A JP 2013085351A
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power transmission
coil
power
transmission device
power receiving
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Toshinori Sugiyama
寿紀 杉山
Yasushi Miyauchi
靖 宮内
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Maxell Holdings Ltd
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Hitachi Maxell Ltd
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PROBLEM TO BE SOLVED: To provide a non-contact power transmission device which has a large likelihood for positioning a power reception device in a power transmission device, has a little burden of device operation, and can obtain sufficient transmission efficiency while having a simple structure.SOLUTION: The non-contact power transmission device includes a power transmission device 1 having a power transmission coil 6 including a resonant coil, and a power reception device 10 having a power reception coil 14 including the resonant coil. The power transmission device includes a positioning portion 12 having a peripheral edge shape along the inner peripheral edge of at least a part of at least one power transmission coil, and the power reception device includes a power reception coil storing case 2 for storing the power reception coil. At least a part of the outer peripheral edge of the power reception coil storing case forms a position reference surface along the peripheral edge shape of the positioning portion, the loop shape of the power reception coil is an oval shape or such a curved oval shape that the outer peripheral edge of the oval shape in a long diameter direction is curved, and at least a part of the outer peripheral edge in the long diameter direction is stored along the position reference surface of the power reception coil storing case.

Description

本発明は、非接触(ワイヤレス)で電力を伝送する非接触電力伝送装置に関する。   The present invention relates to a non-contact power transmission apparatus that transmits power in a non-contact (wireless) manner.

非接触で電力を伝送する方法として、電磁誘導(数100kHz)による電磁誘導型、電界または磁界共鳴を介したLC共振間伝送による電界・磁界共鳴型、電波(数GHz)によるマイクロ波送電型、あるいは可視光領域の電磁波(光)によるレーザ送電型が知られている。この中で既に実用化されているのは、電磁誘導型である。これは簡易な回路(トランス方式)で実現可能であるなどの優位性はあるが、送電距離が短いという課題もある。   As a method of transmitting power in a non-contact manner, an electromagnetic induction type by electromagnetic induction (several hundreds of kHz), an electric field / magnetic field resonance type by transmission between LC resonances via electric field or magnetic field resonance, a microwave power transmission type by radio waves (several GHz), Alternatively, a laser power transmission type using electromagnetic waves (light) in the visible light region is known. Among them, the electromagnetic induction type has already been put into practical use. This has the advantage that it can be realized with a simple circuit (transformer system), but there is also a problem that the transmission distance is short.

そこで、最近になって近距離伝送(〜2m)が可能な電界・磁界共鳴型の電力伝送が注目を浴びてきた。このうち、電界共鳴型の場合、伝送経路中に手などを入れると、人体が誘電体であるため、エネルギーを熱として吸収して誘電体損失を生じる。これに対して磁界共鳴型の場合、人体がエネルギーをほとんど吸収せず、誘電体損失を避けられる。この点から磁界共鳴型に対する注目度が上昇してきている。   Therefore, recently, electric field / magnetic field resonance type power transmission capable of short-distance transmission (up to 2 m) has attracted attention. Among these, in the case of the electric field resonance type, when a hand or the like is put in the transmission path, the human body is a dielectric, so that energy is absorbed as heat and dielectric loss occurs. On the other hand, in the case of the magnetic resonance type, the human body hardly absorbs energy, and dielectric loss can be avoided. From this point of view, attention to the magnetic resonance type has been increasing.

このような電磁誘導型や磁界共鳴型の構成により非接触で電力を送受電する場合、送電器に対して受電器が正しく置かれていないと、効率良く電力を伝送することができない。例えば、特許文献1に記載されているような磁界共鳴型の送受電装置は、電磁誘導を用いた送受電装置よりも比較的位置決め尤度が高いと言われているが、実用上、受電器に対する何らかの位置決め装置が必要である。   When power is transmitted and received in a contactless manner using such an electromagnetic induction type or magnetic field resonance type configuration, the power cannot be efficiently transmitted unless the power receiver is properly placed with respect to the power transmitter. For example, a magnetic field resonance type power transmitting and receiving device as described in Patent Document 1 is said to have a relatively high positioning likelihood as compared with a power transmitting and receiving device using electromagnetic induction. Some positioning device is required.

特許文献1は、車両に設けられた受電コイルに対して送電コイルから電力を伝送する装置に関するものである。送電コイルに対する車両内の送電コイルを位置決めするために、送電コイルが送電する電力量と受電部が受電する電力量との相関に基づいて電力の受電状態を検知する受電状態検知手段と、受電状態検知手段が検知する受電状態が良くなるように受電コイルの位置を調整する受電コイル調整手段とを設けることが開示されている。受電コイル調整手段の例としては、受電コイルの位置を自在に変更可能な駆動ユニットが用いられ、駆動ユニットのサーボモータが作動することで受電コイルの位置を動かすように構成されている。地面に固定された送電ユニットに対して、受電コイルは駆動ユニットによって前後方向、左右方向、上下方向へ移動可能である。   Patent Document 1 relates to an apparatus that transmits electric power from a power transmission coil to a power reception coil provided in a vehicle. In order to position the power transmission coil in the vehicle with respect to the power transmission coil, a power reception state detection unit that detects a power reception state based on a correlation between the amount of power transmitted by the power transmission coil and the amount of power received by the power reception unit; It is disclosed to provide a power receiving coil adjusting means for adjusting the position of the power receiving coil so that the power receiving state detected by the detecting means is improved. As an example of the power receiving coil adjusting means, a drive unit capable of freely changing the position of the power receiving coil is used, and the position of the power receiving coil is moved by operating a servo motor of the drive unit. With respect to the power transmission unit fixed to the ground, the power receiving coil can be moved in the front-rear direction, the left-right direction, and the up-down direction by the drive unit.

しかし、特許文献1に記載されているような自動車等の大型機器に関しては、その様な位置決め機構の存在は許容出来るが、補聴器等の小型機器に関しては、装置スペースおよび装置コストの観点から、その様な位置調整機構を備える事は許容できない。   However, for a large device such as an automobile described in Patent Document 1, the presence of such a positioning mechanism is acceptable, but for a small device such as a hearing aid, from the viewpoint of device space and device cost, It is unacceptable to have such a position adjustment mechanism.

そのため、特許文献2に示されるような電動歯ブラシあるいは電動工具のような小型電気機器の場合は、やむを得ず、勘合部材による位置決めを用いていた。あるいは、位置ずれ尤度が少ない位置規制部材を配置することにより、受電コイルを内蔵する補聴器の位置をタイトに規制し、送電コイルとの相対位置がずれないような構成にしていた。そのような、補聴器を受電装置とし、位置ずれ尤度が少ない位置規制部材を備えた非接触電力伝送装置の例について、図14〜図17を参照して説明する。   Therefore, in the case of a small electric device such as an electric toothbrush or electric tool as shown in Patent Document 2, it is inevitable that positioning by a fitting member is used. Alternatively, by arranging a position regulating member with a low positional deviation likelihood, the position of the hearing aid incorporating the power receiving coil is tightly regulated so that the relative position with respect to the power transmitting coil does not shift. An example of such a non-contact power transmission device that includes a hearing aid as a power receiving device and includes a position regulating member with a low positional deviation likelihood will be described with reference to FIGS.

図14は、従来例の非接触電力伝送装置の受電装置である補聴器の構成を示す斜視図である。図15は、当該補聴器を含む非接触電力伝送装置の構成を示す平面図、図16はその断面図を示す。   FIG. 14 is a perspective view showing a configuration of a hearing aid that is a power receiving device of a conventional contactless power transmission device. FIG. 15 is a plan view showing a configuration of a non-contact power transmission apparatus including the hearing aid, and FIG. 16 is a cross-sectional view thereof.

図14に示す補聴器32は、補聴器筐体2、イアホン3、及びそれらを連結する連結部4からなる。補聴器筐体2内には、電源となるコイン型2次電池5、及び円形の受電コイル33が収納されている。図15及び図16に示す送電装置36は、送電装置ケース37を有し、送電装置ケース37内に、送電コイル38、補聴器装着凹部39が配置され、補聴器装着凹部39内に位置決め凸部40が形成されている。補聴器装着凹部39の下部に送電コイル収納部13が設けられており、送電コイル38は送電コイル収納部13に収納されている。   A hearing aid 32 shown in FIG. 14 includes a hearing aid housing 2, an earphone 3, and a connecting portion 4 for connecting them. In the hearing aid housing 2, a coin-type secondary battery 5 as a power source and a circular power receiving coil 33 are housed. The power transmission device 36 shown in FIGS. 15 and 16 has a power transmission device case 37, in which the power transmission coil 38 and the hearing aid mounting recess 39 are disposed, and the positioning convex portion 40 is disposed in the hearing aid mounting recess 39. Is formed. A power transmission coil storage unit 13 is provided below the hearing aid mounting recess 39, and the power transmission coil 38 is stored in the power transmission coil storage unit 13.

送電装置36により補聴器32に対する電力伝送を行うときには、補聴器32の内側に位置決め凸部40が嵌合するように補聴器32を装着する。それにより、受電コイル33と送電コイル38が整列して相対位置がずれないように位置規制され、効率良く電力を伝送することが可能である。   When power transmission to the hearing aid 32 is performed by the power transmission device 36, the hearing aid 32 is mounted so that the positioning convex portion 40 fits inside the hearing aid 32. As a result, the power receiving coil 33 and the power transmitting coil 38 are aligned so that their relative positions do not shift and power can be transmitted efficiently.

特開2010−246348号公報JP 2010-246348 A 特開平6−311660号公報JP-A-6-31660

上記従来例のように、コスト増の許容値が小さい小型の民生機器に関しては、位置ずれ尤度が少ない位置規制部材を配置する事により、コスト抑制可能であるが、受電コイルを備えた機器を決まった場所に正確に装着する操作が必要があり、装置使用者の負担増になっていた。近年、機器取り扱いに関してはユニバーサル化が叫ばれており、特に高齢者の使用頻度が高くなる補聴器等は、低コストでかつ使用者の負担が小さい機器構成が望まれる。   As in the above conventional example, for small consumer devices with a small allowance for cost increase, it is possible to reduce the cost by arranging a position regulating member with a low likelihood of displacement, but a device equipped with a power receiving coil It was necessary to mount the device accurately at a fixed location, which increased the burden on the user of the device. In recent years, universalization has been screamed regarding the handling of devices, and in particular, hearing aids and the like that are frequently used by elderly people are desired to have a low-cost and low-loading device configuration.

これに対して、図17に示すように、内側の位置決め凸部40を設けずに補聴器装着凹部39のみで位置規制する構成とすれば、位置決め尤度が大きくなる。しかし、図示したように、受電コイル33と送電コイル38の相対位置がずれ易くなり、このような状態になると、図18に示すように、電力伝送の効率は著しく低下する。図18において、受電コイル33と送電コイル38の相対位置ずれは、送電コイル38の中心軸と受電コイル33の中心軸の相対中心軸間距離(r/rm’)によって横軸に示される。rはコイル中心間距離、rm’は補聴器装着凹部39の半径である。r/rm’の値が0から縦の破線で示す狭い範囲のみで、実用的に十分な電送効率が得られることが判る。   On the other hand, as shown in FIG. 17, if the position is restricted only by the hearing aid mounting recess 39 without providing the inner positioning protrusion 40, the positioning likelihood increases. However, as shown in the figure, the relative positions of the power receiving coil 33 and the power transmitting coil 38 are likely to be shifted, and in this state, the efficiency of power transmission is significantly reduced as shown in FIG. In FIG. 18, the relative displacement between the power receiving coil 33 and the power transmitting coil 38 is indicated on the horizontal axis by the relative center axis distance (r / rm ′) between the central axis of the power transmitting coil 38 and the central axis of the power receiving coil 33. r is the distance between the coil centers, and rm ′ is the radius of the hearing aid mounting recess 39. It can be seen that practically sufficient transmission efficiency can be obtained only when the value of r / rm 'is from 0 to a narrow range indicated by a vertical broken line.

以上のことを考慮して、本発明は、送電装置内での受電装置の位置決め尤度が大きくて装置操作の負担が少なく、しかも簡素な構造でありながら十分な伝送効率が得られる位置決めが可能な非接触電力伝送装置を提供することを目的とする。   In view of the above, the present invention has a high positioning likelihood of the power receiving device in the power transmission device, reduces the burden of device operation, and enables positioning with sufficient transmission efficiency while having a simple structure. An object of the present invention is to provide a non-contact power transmission device.

本発明の非接触電力伝送装置は、共振コイルを含む送電コイルを有する送電装置と、共振コイルを含む受電コイルを有する受電装置とを備え、前記送電コイルと前記受電コイルの間の磁界共鳴を介して前記送電装置から前記受電装置へ電力を伝送するように構成され、前記送電装置は、少なくとも1個の前記送電コイルの少なくとも一部分の内周縁に沿った周縁形状を有する位置決め部を備え、前記受電装置は、前記受電コイルを収納する受電コイル収納ケースを備え、前記受電コイル収納ケースは外周縁の少なくとも一部が前記位置決め部の周縁形状に沿った位置基準面を形成し、前記受電コイルは、ループ形状が、長円形であるか、または長円形の長径方向の外周縁が湾曲した湾曲長円形であり、その長径方向の外周縁の少なくとも一部は前記受電コイル収納ケースの位置基準面に沿うように収納されていることを特徴とする。   A non-contact power transmission device of the present invention includes a power transmission device having a power transmission coil including a resonance coil, and a power reception device including a power reception coil including a resonance coil, and through magnetic field resonance between the power transmission coil and the power reception coil. Power transmission from the power transmission device to the power reception device, the power transmission device including a positioning portion having a peripheral shape along an inner peripheral edge of at least a part of at least one of the power transmission coils, The apparatus includes a power reception coil storage case for storing the power reception coil, wherein the power reception coil storage case forms a position reference surface along a peripheral shape of the positioning portion at least a part of an outer peripheral edge. The loop shape is an oval, or a curved oval having a curved outer periphery in the major axis direction of the ellipse, and at least a part of the outer periphery in the major axis direction Characterized in that it is housed along the position reference surface of the power receiving coil housing case.

上記構成の非接触電力伝送装置によれば、送電装置の位置決め部と受電コイル収納ケースの位置基準面の関係、及び受電コイルの受電コイル収納ケース内での配置の相互関係に基づき、送電装置内での受電装置の位置決め尤度が大きいにも関わらず、適切な範囲に維持できる。しかも、受電コイルのループ形状が長円形または湾曲長円形であることにより、送電コイルと受電コイル間で十分な伝送効率を得ることができる。従って、小型の装置に十分に適用可能な簡素な構造でありながら、装置操作の負担の少ない、高効率な使い勝手の良い非接触電力伝送装置が得られる。   According to the non-contact power transmission device having the above configuration, in the power transmission device based on the relationship between the positioning unit of the power transmission device and the position reference plane of the power receiving coil storage case and the arrangement of the power receiving coil in the power receiving coil storage case. Although the positioning likelihood of the power receiving device in the case is large, it can be maintained in an appropriate range. In addition, since the loop shape of the power receiving coil is oval or curved oval, sufficient transmission efficiency can be obtained between the power transmitting coil and the power receiving coil. Therefore, it is possible to obtain a highly efficient and easy-to-use non-contact power transmission apparatus that has a simple structure that can be sufficiently applied to a small-sized apparatus and has a small burden on apparatus operation.

実施の形態1における非接触電力伝送装置の受電装置を構成する補聴器を示す斜視図The perspective view which shows the hearing aid which comprises the power receiving apparatus of the non-contact electric power transmission apparatus in Embodiment 1. 同非接触電力伝送装置の送電装置に補聴器が装着された状態を示す平面図The top view which shows the state with which the hearing aid was mounted | worn with the power transmission apparatus of the non-contact power transmission apparatus 同非接触電力伝送装置の図2に示した状態の断面図Sectional drawing of the state shown in Drawing 2 of the non-contact electric power transmission device 同非接触電力伝送装置の送電装置における補聴器の位置決め形態の一例を示す平面図The top view which shows an example of the positioning form of the hearing aid in the power transmission apparatus of the non-contact power transmission apparatus 同非接触電力伝送装置の送電装置における補聴器の位置決め形態の他の例を示す平面図The top view which shows the other example of the positioning form of the hearing aid in the power transmission apparatus of the non-contact electric power transmission apparatus 同非接触電力伝送装置の送電装置に対する補聴器の相対位置の定義を説明するための平面図The top view for demonstrating the definition of the relative position of the hearing aid with respect to the power transmission apparatus of the non-contact power transmission apparatus 実施の形態2における非接触電力伝送装置の送電装置に受電装置を構成する補聴器が装着された状態を示す平面図The top view which shows the state with which the hearing aid which comprises a power receiving apparatus was mounted | worn with the power transmission apparatus of the non-contact electric power transmission apparatus in Embodiment 2. 同非接触電力伝送装置の送電装置に対する補聴器の相対位置の定義を説明するための平面図The top view for demonstrating the definition of the relative position of the hearing aid with respect to the power transmission apparatus of the non-contact power transmission apparatus 比較例1の非接触電力伝送装置の送電装置に補聴器が装着された状態を示す平面図The top view which shows the state with which the hearing aid was mounted | worn with the power transmission apparatus of the non-contact electric power transmission apparatus of the comparative example 1. 比較例2の非接触電力伝送装置の送電装置に補聴器が装着された状態を示す平面図The top view which shows the state with which the hearing aid was mounted | worn with the power transmission apparatus of the non-contact electric power transmission apparatus of the comparative example 2. 実施の形態1、2および比較例1、2の非接触電力伝送装置の伝送効率に関する特性を示す図The figure which shows the characteristic regarding the transmission efficiency of Embodiment 1, 2 and the non-contact electric power transmission apparatus of Comparative Examples 1 and 2 実施の形態3における非接触電力伝送装置の送電装置に受電装置の一態様である補聴器が装着された状態を示す平面図The top view which shows the state with which the hearing aid which is an aspect of a receiving device was mounted | worn with the power transmission apparatus of the non-contact electric power transmission apparatus in Embodiment 3 実施の形態4における非接触電力伝送装置の送電装置に受電装置の一態様である懐中電灯が装着された状態を示す平面図The top view which shows the state with which the flashlight which is an aspect of a receiving device was mounted | worn with the power transmission apparatus of the non-contact electric power transmission apparatus in Embodiment 4 従来例の非接触電力伝送装置の受電装置である補聴器の構成を示す斜視図The perspective view which shows the structure of the hearing aid which is a receiving device of the non-contact electric power transmission apparatus of a prior art example. 同非接触電力伝送装置の送電装置に補聴器が装着された状態を示す平面図The top view which shows the state with which the hearing aid was mounted | worn with the power transmission apparatus of the non-contact power transmission apparatus 同非接触電力伝送装置の図15に示した状態の断面図Sectional drawing of the state shown in FIG. 15 of the non-contact electric power transmission apparatus 同非接触電力伝送装置の課題を説明するための平面図The top view for demonstrating the subject of the non-contact electric power transmission apparatus 同非接触電力伝送装置の伝送効率に関する特性を示す図The figure which shows the characteristic regarding the transmission efficiency of the same non-contact electric power transmission equipment

本発明の非接触電力伝送装置は、上記構成を基本として、以下のような態様を採ることができる
すなわち、前記受電装置位置決め部は、前記送電装置に装着された前記受電装置を平面内方向における周囲を包囲する形状を有することが好ましい。それにより、送電装置内での受電装置の位置決め尤度を、適切な範囲内に容易に抑制することができる。その場合、前記送電コイルの形状は、円形もしくは正多角形とすることができる。
The non-contact power transmission device of the present invention can take the following aspects based on the above configuration. That is, the power receiving device positioning unit moves the power receiving device mounted on the power transmitting device in an in-plane direction. It preferably has a shape surrounding the periphery. Thereby, the positioning likelihood of the power receiving device in the power transmitting device can be easily suppressed within an appropriate range. In that case, the shape of the power transmission coil may be a circle or a regular polygon.

また、前記位置決め部による前記受電コイル収納ケースの位置決め形態は、複数の形態を採ることが可能なように構成することができる。   Moreover, the positioning form of the said receiving coil storage case by the said positioning part can be comprised so that a several form can be taken.

また、前記位置決め部により前記受電コイル収納ケースが位置決めされ、その結果、前記受電コイルが、前記送電コイルのループ形状の内周縁に対して位置決めされる構成とすることができる。   Further, the power receiving coil storage case is positioned by the positioning portion, and as a result, the power receiving coil can be positioned with respect to the loop-shaped inner periphery of the power transmitting coil.

また、前記位置決め部により決定される前記受電コイルと前記送電コイルの相対位置は、前記送電コイルから前記受電コイルへの電力伝送効率が、前記送電コイルと平行な面内において最大になるよう設定されていることが好ましい。   The relative position between the power receiving coil and the power transmitting coil determined by the positioning unit is set so that the power transmission efficiency from the power transmitting coil to the power receiving coil is maximized in a plane parallel to the power transmitting coil. It is preferable.

以下、本発明の実施の形態について、図面を参照しながら説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<実施の形態1>
実施の形態1における非接触電力伝送装置の構成について、図1〜図3を参照して説明する。本実施の形態は、受電装置を構成する小型の機器の一例として補聴器を対象とし、補聴器に対して電力伝送するために構成された非接触電力伝送装置に関するものである。図1は、補聴器の構成を示す斜視図、図2は、当該補聴器を含む非接触電力伝送装置の構成を示す平面図、図3はその断面図を示す。なお、図2の平面図では、送電装置の蓋部等の図示が省略されている。
<Embodiment 1>
The configuration of the non-contact power transmission apparatus according to Embodiment 1 will be described with reference to FIGS. The present embodiment is directed to a hearing aid as an example of a small device constituting the power receiving device, and relates to a non-contact power transmission device configured to transmit power to the hearing aid. FIG. 1 is a perspective view showing the configuration of a hearing aid, FIG. 2 is a plan view showing the configuration of a non-contact power transmission device including the hearing aid, and FIG. 3 is a cross-sectional view thereof. In the plan view of FIG. 2, illustration of a lid portion and the like of the power transmission device is omitted.

図1に示す補聴器(受電装置)1は、補聴器筐体2、イアホン3、及びそれらを連結する連結部4からなる。補聴器筐体2内には、電源となるコイン型2次電池5、及び受電コイル6が収納されている。従って、補聴器筐体2は、受電コイル収納ケースを構成する。本実施の形態の特徴は、受電コイル6のループ形状の外形が、湾曲した長円形を成していることである。ここで、湾曲した長円形とは、長円形の長径に沿った外周縁が湾曲して略C字型を成していることを意味するものとする。以下の記載では、このループ形状を湾曲長円形と称する。   A hearing aid (power receiving device) 1 shown in FIG. 1 includes a hearing aid housing 2, an earphone 3, and a connecting portion 4 for connecting them. In the hearing aid housing 2, a coin-type secondary battery 5 and a power receiving coil 6 serving as a power source are housed. Therefore, the hearing aid housing 2 constitutes a receiving coil storage case. The feature of this embodiment is that the outer shape of the loop shape of the power receiving coil 6 forms a curved ellipse. Here, the curved ellipse means that the outer peripheral edge along the major axis of the ellipse is curved to form a substantially C shape. In the following description, this loop shape is referred to as a curved ellipse.

図示は省略するが、補聴器筐体2内には更に、整流回路、充放電制御回路、および補聴器回路が収納されている。従って、受電コイル6により発生する交流電流は、整流回路により整流されて充放電制御回路に供給され、充放電制御回路によりコイン型2次電池5への充放電制御が行われる。また、補聴器回路は、イアホン3を駆動するための電力をコイン型2次電池5から供給される。   Although not shown, the hearing aid housing 2 further houses a rectifier circuit, a charge / discharge control circuit, and a hearing aid circuit. Therefore, the alternating current generated by the power receiving coil 6 is rectified by the rectifier circuit and supplied to the charge / discharge control circuit, and the charge / discharge control to the coin-type secondary battery 5 is performed by the charge / discharge control circuit. In addition, the hearing aid circuit is supplied with power for driving the earphone 3 from the coin-type secondary battery 5.

図2及び図3に示す送電装置10は、送電装置ケース11を有し、送電装置ケース11内に補聴器1を位置規制する位置決め部材12が配置されている。位置決め部材12の下部に、送電コイル収納部13が設けられて、送電コイル14が収納されている。送電装置ケース11の内面と位置決め部材12の間には、送電コイル14から発生する電磁波が外部に漏れるのを防ぐ電磁シールド部材15が配置されている。送電装置ケース11内には更に、送電コイル14に高周波電流を供給する高周波回路16、及び送電装置10の動作を制御する制御回路17が収納されている。送電装置ケース11には、ヒンジ18を介して送電装置ケース用蓋19が連結されている。送電装置ケース用蓋19の内部には、蓋側電磁シールド部材20が配置され、その内側には蓋部内壁21が設けられている。   A power transmission device 10 illustrated in FIGS. 2 and 3 includes a power transmission device case 11, and a positioning member 12 that positions the hearing aid 1 is disposed in the power transmission device case 11. A power transmission coil storage unit 13 is provided below the positioning member 12 to store the power transmission coil 14. Between the inner surface of the power transmission device case 11 and the positioning member 12, an electromagnetic shield member 15 that prevents electromagnetic waves generated from the power transmission coil 14 from leaking to the outside is disposed. The power transmission device case 11 further houses a high frequency circuit 16 that supplies a high frequency current to the power transmission coil 14 and a control circuit 17 that controls the operation of the power transmission device 10. A power transmission device case lid 19 is connected to the power transmission device case 11 via a hinge 18. A lid-side electromagnetic shield member 20 is disposed inside the power transmission device case lid 19, and a lid portion inner wall 21 is provided inside the lid-side electromagnetic shield member 20.

位置決め部材12と送電コイル14の形状は、送電コイル14の内周縁の方がわずかに曲率半径は小さいが、ほぼ同一の曲線形状を有し、かつ補聴器筐体2の外周縁形状もほぼそれと同一の形状を有する。その結果、補聴器筐体2の外周縁は位置決め部材12の内壁にほぼ沿った位置に位置決めされ、結果として補聴器筐体2内部に配置されている湾曲長円形のループ形状を有する受電コイル6は、送電コイル14の内周縁に近い内周側に配置される。このように、補聴器筐体2は外周縁の少なくとも一部は、位置決め部材12の内壁(周縁形状)に沿うように形成されて位置基準面を構成している。   The shapes of the positioning member 12 and the power transmission coil 14 are slightly smaller in radius of curvature at the inner periphery of the power transmission coil 14, but have substantially the same curved shape, and the outer peripheral shape of the hearing aid housing 2 is also substantially the same. It has the shape of As a result, the outer peripheral edge of the hearing aid housing 2 is positioned at a position substantially along the inner wall of the positioning member 12, and as a result, the power receiving coil 6 having a curved oval loop shape disposed inside the hearing aid housing 2 is It arrange | positions at the inner peripheral side near the inner peripheral edge of the power transmission coil 14. FIG. Thus, at least a part of the outer peripheral edge of the hearing aid housing 2 is formed along the inner wall (periphery shape) of the positioning member 12 to constitute a position reference plane.

位置決め部材12は、補聴器1に対する位置決め尤度が広い構成になっている。図4及び図5に、補聴器1の位置決め形態の例を示す。図2に示した位置決め形態と図4に示す位置決め形態との比較から判るように、補聴器1は位置決め部材12内で回転可能であり、回動角度方向における位置決め尤度が確保されている。また、図5に示す位置決め形態の様に、ある程度の範囲であれば平行に移動も可能である。このような構成により、使用者は補聴器1を送電装置10にセットするときに、補聴器1の角度や位置をあまり気にする事無く操作可能である。   The positioning member 12 has a wide positioning likelihood with respect to the hearing aid 1. 4 and 5 show examples of the positioning form of the hearing aid 1. FIG. As can be seen from the comparison between the positioning configuration shown in FIG. 2 and the positioning configuration shown in FIG. 4, the hearing aid 1 can rotate within the positioning member 12, and the positioning likelihood in the rotational angle direction is ensured. Further, as in the positioning form shown in FIG. 5, it can be moved in parallel within a certain range. With such a configuration, the user can operate the hearing aid 1 without worrying about the angle and position of the hearing aid 1 when setting the hearing aid 1 on the power transmission device 10.

上記構成の非接触電力伝送装置による効果について検証するために、以下のような実験を行った。実験に用いた装置の諸元は、以下のとおりである。   In order to verify the effect of the non-contact power transmission apparatus having the above configuration, the following experiment was performed. The specifications of the apparatus used for the experiment are as follows.

送電コイル14は、外径65mm、内径55mm(平均半径rm=30mm)の平面上に巻かれたターン数5のスパイラルコイルとし、外付けコンデンサー(図示せず)を接続し、共振周波数が10MHzになるよう調整した。受電コイル6は、平面状に巻かれたターン数10のスパイラルコイルであり、外付けコンデンサー(図示せず)を接続して、同様に共振周波数が10MHzになるように調整した。受電コイル6の長径d11は45mm、短径d12は9mmである。   The power transmission coil 14 is a spiral coil having a turn number of 5 wound on a plane having an outer diameter of 65 mm and an inner diameter of 55 mm (average radius rm = 30 mm), connected to an external capacitor (not shown), and a resonance frequency of 10 MHz. It adjusted so that it might become. The power receiving coil 6 is a spiral coil having a number of turns of 10 wound in a plane, and an external capacitor (not shown) is connected to adjust the resonance frequency to 10 MHz in the same manner. The power receiving coil 6 has a major axis d11 of 45 mm and a minor axis d12 of 9 mm.

長径d11、短径d12の定義は、図6に示すとおりである。すなわち、本実施の形態では、受電コイル6の湾曲長円形は、長円の長軸が円弧を形成して湾曲している。湾曲した長軸の円弧の中点と円弧の曲率中心を結ぶ方向に平行な線であって、受電コイル6の長手方向における外形の両端の半円にそれぞれ接する2本の接線を描き、その2本の接線間の距離を長径d11とする。また、湾曲した長軸の円弧に直交する方向における受電コイル6の幅を短径d12とする。   The definitions of the major axis d11 and the minor axis d12 are as shown in FIG. In other words, in the present embodiment, the ellipse of the power receiving coil 6 is curved with the major axis of the ellipse forming an arc. Draw two tangent lines that are parallel to the direction connecting the midpoint of the curved long-axis arc and the center of curvature of the arc, and touch the semicircles at both ends of the outer shape of the receiving coil 6 in the longitudinal direction. The distance between the tangent lines of the book is defined as the major axis d11. Further, the width of the power receiving coil 6 in the direction orthogonal to the curved major axis arc is defined as a minor axis d12.

また、送電コイル14が形成する下面と受電コイル6が形成する上面の間の距離、すなわち図3に示す距離hは、補聴器筐体2が、位置決め部材12の底面に接した状態で、約5mmである。上記距離hを5mmに保持して、送電コイル14の中心軸と受電コイル6の中心軸間の距離r(mm)を変化させて、コイル間の電送効率を測定した。この送電コイル14の中心軸と受電コイル6の中心軸間の距離を、以下の記載せはコイル中心間距離rと記述する。   Further, the distance h between the lower surface formed by the power transmission coil 14 and the upper surface formed by the power receiving coil 6, that is, the distance h shown in FIG. 3 is about 5 mm when the hearing aid housing 2 is in contact with the bottom surface of the positioning member 12. It is. While maintaining the distance h at 5 mm, the distance r (mm) between the central axis of the power transmission coil 14 and the central axis of the power receiving coil 6 was changed to measure the transmission efficiency between the coils. The distance between the central axis of the power transmission coil 14 and the central axis of the power receiving coil 6 is described as the coil center distance r below.

コイル中心間距離r(mm)の定義は、図6に示すそれぞれの距離r11,r12,r13の平均値とした。ここで、距離r11は、受電コイル6の一方の端部に形成された半円の曲率中心軸から送電コイル14の中心軸までの距離である。距離r12は、受電コイル6の他方の端部に形成された半円の曲率中心軸から送電コイル14の中心軸までの距離である。距離r13は湾曲した長軸の円弧の中点を通る軸から送電コイル14の中心軸までの距離である。   The distance r (mm) between the coil centers is defined as an average value of the distances r11, r12, r13 shown in FIG. Here, the distance r <b> 11 is a distance from the central axis of curvature of a semicircle formed at one end of the power receiving coil 6 to the central axis of the power transmission coil 14. The distance r <b> 12 is a distance from the semicircular curvature central axis formed at the other end of the power receiving coil 6 to the central axis of the power transmission coil 14. The distance r <b> 13 is a distance from an axis passing through the midpoint of the curved long-axis arc to the center axis of the power transmission coil 14.

以上のようにして測定した、送電コイル14と受電コイル6間の伝送効率は、図11に実施例1の特性線で示すとおりであった。図11において、横軸は、相対中心軸間距離(r/rm)を示す。相対中心軸間距離(r/rm)は、送電コイル平均半径rmに対するコイル中心間距離rの比であり、受電コイルと送電コイルの相対位置ずれを表す。   The transmission efficiency between the power transmission coil 14 and the power reception coil 6 measured as described above was as shown by the characteristic line of Example 1 in FIG. In FIG. 11, the horizontal axis represents the relative center axis distance (r / rm). The relative center axis distance (r / rm) is the ratio of the coil center distance r to the power transmission coil average radius rm, and represents the relative positional deviation between the power reception coil and the power transmission coil.

ここで、コイル中心間距離r(mm)は、位置決め部材12と補聴器筐体2の外周部が近接した状態であれば、補聴器1の角度によらず一定である。すなわち、図2に示した状態でのコイル中心間距離rの値をra、図4に示した状態でのコイル中心間距離rの値をrbとし、位置決め部材により許容されるコイル中心間距離rの最大値をrmaxと記述すれば、それらの関係は、下記の式で表される。   Here, the distance r (mm) between the coil centers is constant regardless of the angle of the hearing aid 1 as long as the positioning member 12 and the outer peripheral portion of the hearing aid housing 2 are close to each other. That is, the value of the coil center distance r in the state shown in FIG. 2 is ra, the value of the coil center distance r in the state shown in FIG. 4 is rb, and the coil center distance r allowed by the positioning member. If the maximum value of is described as rmax, the relationship between them is expressed by the following equation.

ra≒rb≒rmax
一方、図5に示した状態でのコイル中心間距離rの値をrcとし、位置決め部材により許容されるコイル中心間距離rの最小値をrminと記述すれば、それらの関係は、下記の式で表される。
ra≈rb≈rmax
On the other hand, if the value of the distance r between the coil centers in the state shown in FIG. 5 is rc, and the minimum value of the distance r between the coil centers allowed by the positioning member is described as rmin, the relationship between them is It is represented by

rc≒rmin
本実施の形態の一実施例では、rmax=25mm,rmin=16mmになるように設定した。言い換えれば、送電コイル14の平均半径rm=30mmに対する中心軸間距離rの比率である相対中心軸間距離(r/rm)が、約0.53〜0.83の範囲になる様に、補聴器1の外形および位置決め部材12の寸法が設定されている。
rc≈rmin
In one example of the present embodiment, rmax = 25 mm and rmin = 16 mm are set. In other words, the hearing aid so that the relative center axis distance (r / rm), which is the ratio of the center axis distance r to the average radius rm = 30 mm of the power transmission coil 14, is in the range of about 0.53 to 0.83. 1 and the dimensions of the positioning member 12 are set.

図11の実施例1の特性線で示した電送効率は、送電装置10の位置決め部材12の側壁を取り払った状態にして、相対中心軸間距離(r/rm)の値を0.3から1.2の範囲で変化させて測定した結果を示すものである。縦の破線で示す範囲が、相対中心軸間距離(r/rm)の0.53〜0.83の範囲に相当する。   The transmission efficiency indicated by the characteristic line of Example 1 in FIG. 11 is a state in which the side wall of the positioning member 12 of the power transmission device 10 is removed, and the value of the relative center axis distance (r / rm) is 0.3 to 1. .2 shows the results of measurement with a change in the range of 2. A range indicated by a vertical broken line corresponds to a range of 0.53 to 0.83 of the distance (r / rm) between the relative central axes.

図11から明らかな様に、上記構成の非接触電力伝送装置によれば、送電装置ケース11内で補聴器1の位置決め尤度が大きいにも関わらず、相対中心軸間距離(r/rm)が、約0.5〜0.83の範囲になる様にコイル中心間距離r設計することにより、送電コイル14と受電コイル間の電送効率は44%以上の高い値に保たれる。   As is clear from FIG. 11, according to the non-contact power transmission device having the above configuration, the relative center axis distance (r / rm) is large in spite of the large positioning likelihood of the hearing aid 1 in the power transmission device case 11. By designing the distance r between the coil centers so as to be in the range of about 0.5 to 0.83, the transmission efficiency between the power transmission coil 14 and the power reception coil is maintained at a high value of 44% or more.

また、図18に示した従来例における補聴器装着凹部39の半径rm’は、本実施の形成の送電コイル14の平均半径rmにほぼ値が等しいので、r/rm≒r/rm’の関係が成り立ち、従来例と比較すると、十分広い範囲で、高い電送効率が実現出来る事が分かる。   Further, since the radius rm ′ of the hearing aid mounting recess 39 in the conventional example shown in FIG. 18 is substantially equal to the average radius rm of the power transmission coil 14 formed in this embodiment, the relationship r / rm≈r / rm ′ is satisfied. As a result, it can be seen that high power transmission efficiency can be realized in a sufficiently wide range as compared with the conventional example.

このように、使用者が補聴器を送電装置にセットするときに、補聴器の位置や姿勢について厳密な調整を行うことが不要でありながら、自動的に送電コイルと受電コイル間の電送効率として最大かそれに近い値が得られる。従って、操作時の負担が少ない。   In this way, when the user sets the hearing aid to the power transmission device, it is not necessary to strictly adjust the position and orientation of the hearing aid, but the maximum transmission efficiency between the power transmission coil and the power reception coil is automatically set. A value close to that is obtained. Therefore, the burden on operation is small.

<実施の形態2>
実施の形態2における非接触電力伝送装置の構成について、図7〜図8を参照して説明する。本実施の形態も、受電装置を構成する小型の機器の一例として補聴器を対象とし、補聴器に対して電力伝送するために構成された非接触電力伝送装置に関するものである。図7は、補聴器(受電装置)22を含む非接触電力伝送装置の構成を示す平面図である。本実施の形態の構成は、補聴器22内の受電コイル23の形状以外は、実施の形態1の構成と同一であるため、同一の要素については同一の参照番号を付して、説明の繰り返しを簡略化する。
<Embodiment 2>
The configuration of the non-contact power transmission apparatus according to Embodiment 2 will be described with reference to FIGS. The present embodiment also relates to a non-contact power transmission device configured to transmit power to a hearing aid, targeting a hearing aid as an example of a small device constituting the power receiving device. FIG. 7 is a plan view showing a configuration of a non-contact power transmission device including a hearing aid (power receiving device) 22. Since the configuration of the present embodiment is the same as the configuration of the first embodiment except for the shape of the power receiving coil 23 in the hearing aid 22, the same elements are denoted by the same reference numerals and the description is repeated. Simplify.

本実施の形態における受電コイル23のループ形状は、長円形状である。受電コイル23の寸法の一例としては、長径d1を28mm、短径d2を8mmとすることができる。   The loop shape of the power receiving coil 23 in the present embodiment is an oval shape. As an example of the dimensions of the power receiving coil 23, the major axis d1 can be 28 mm and the minor axis d2 can be 8 mm.

実施形態1と同様に、位置決め部材12と送電コイル14の形状は、送電コイル14の内縁の方がわずかに曲率半径は小さいが、ほぼ同一の曲線形状をしており、かつ補聴器筐体2の外縁形状もほぼそれに近い形状をしている。その結果、補聴器筐体2の外周部は、位置決め部材12の内壁にほぼ沿った位置に位置決めされる。その結果として、補聴器筐体2の内部に配置される長円形状の受電コイル23は、送電コイル14の内周縁部に沿った形で、かつその内周縁に近い位置に配置される。   Similar to the first embodiment, the positioning member 12 and the power transmission coil 14 have substantially the same curved shape at the inner edge of the power transmission coil 14 but have a slightly smaller radius of curvature. The outer edge shape is almost similar to that. As a result, the outer peripheral portion of the hearing aid housing 2 is positioned at a position substantially along the inner wall of the positioning member 12. As a result, the ellipse-shaped power receiving coil 23 arranged inside the hearing aid housing 2 is arranged along the inner peripheral edge of the power transmitting coil 14 and at a position close to the inner peripheral edge.

本実施の形態においても、補聴器1の外形状および位置決め部材12の形状は、実施形態1の場合と同一なので、使用者は補聴器22を送電装置10にセットするときに、補聴器22の角度や位置をあまり気にする事無く操作可能である。   Also in the present embodiment, since the outer shape of the hearing aid 1 and the shape of the positioning member 12 are the same as those in the first embodiment, when the user sets the hearing aid 22 to the power transmission device 10, the angle and position of the hearing aid 22 are set. It can be operated without worrying too much.

上記構成の非接触電力伝送装置による効果について検証するために、実施の形態1と同様に、送電コイル14が形成する面と受電コイル23が形成する面との距離hを5mmに保持して、送電コイル14の中心軸と受電コイル23の中心軸間のコイル中心間距離r(mm)を変化させて、コイル間の電送効率を測定した。受電コイル23の長径d21を28mm、短径d22を8mmとした以外は、実施の形態1と同様に諸元を設定した。   In order to verify the effect of the non-contact power transmission apparatus having the above configuration, the distance h between the surface formed by the power transmission coil 14 and the surface formed by the power reception coil 23 is maintained at 5 mm, as in the first embodiment. The transmission efficiency between the coils was measured by changing the coil center distance r (mm) between the central axis of the power transmission coil 14 and the central axis of the power receiving coil 23. The specifications were set in the same manner as in Embodiment 1 except that the major axis d21 of the power receiving coil 23 was 28 mm and the minor axis d22 was 8 mm.

コイル中心間距離r(mm)の定義は、図8に示すそれぞれの距離r21,r22,r23の平均値とした。ここで、r21は、受電コイル23の端部に形成される半円の曲率中心軸から送電コイル14の中心軸までの距離である。r22は、受電コイル23の他方の端部に形成された半円の曲率中心軸から送電コイル14の中心軸までの距離である。r23は、受電コイル23の長軸の中点を通る軸と送電コイル14の中心軸までの距離である。   The definition of the distance r (mm) between the coil centers is an average value of the distances r21, r22, r23 shown in FIG. Here, r <b> 21 is a distance from the central axis of the semicircular curvature formed at the end of the power receiving coil 23 to the central axis of the power transmission coil 14. r22 is the distance from the central axis of curvature of the semicircle formed at the other end of the power receiving coil 23 to the central axis of the power transmitting coil 14. r23 is the distance from the axis passing through the midpoint of the long axis of the power receiving coil 23 to the central axis of the power transmitting coil 14.

測定の結果を、図11に実施例2の特性線により示す。同図から明らかな様に、上記構成の非接触電力伝送装置によれば、送電装置ケース11内で補聴器22(受電装置)の位置決め尤度が大きいにも関わらず、送電コイル14の平均半径rm=30mmに対して、相対中心軸間距離(r/rm)が、約0.5〜0.83の範囲になる様に設計することにより、送電コイル14と受電コイル23間の電送効率は、40%以上の高い値が保たれる。   The measurement results are shown in FIG. As is apparent from the figure, according to the non-contact power transmission device having the above-described configuration, the average radius rm of the power transmission coil 14 is high despite the high positioning likelihood of the hearing aid 22 (power reception device) in the power transmission device case 11. By designing so that the relative center axis distance (r / rm) is in a range of about 0.5 to 0.83 with respect to 30 mm, the transmission efficiency between the power transmission coil 14 and the power reception coil 23 is A high value of 40% or more is maintained.

このように、実施形態1と同様に、使用者が補聴器を送電装置にセットするときに、補聴器の位置や姿勢について厳密な調整を行うことが不要でありながら、自動的に送電コイルと受電コイル間の電送効率として最大かそれに近い値が得られる。従って、操作時の負担が少ない。   Thus, as in the first embodiment, when the user sets the hearing aid to the power transmission device, it is not necessary to strictly adjust the position and orientation of the hearing aid, but the power transmission coil and the power reception coil are automatically set. A maximum or near value is obtained as the power transmission efficiency. Therefore, the burden on operation is small.

<比較例1>
上記各実施の形態による効果を検証するために行った、比較例1の非接触電力伝送装置に関する測定について、以下に説明する。比較例1の非接触電力伝送装置の構成は、図9の平面図に示すとおりである。この装置は、実施の形態1〜2と同様、補聴器(受電装置)32に対して電力伝送するように構成されている。この比較例1の構成は、補聴器32内の受電コイル33以外は、実施の形態1と同様である。従って、同一の要素については同一の参照番号を付して、説明の繰り返しを簡略化する。
<Comparative Example 1>
The measurement related to the non-contact power transmission apparatus of Comparative Example 1 performed to verify the effects of the above embodiments will be described below. The configuration of the non-contact power transmission apparatus of Comparative Example 1 is as shown in the plan view of FIG. Similar to the first and second embodiments, this device is configured to transmit power to the hearing aid (power receiving device) 32. The configuration of the comparative example 1 is the same as that of the first embodiment except for the power receiving coil 33 in the hearing aid 32. Therefore, the same reference numerals are assigned to the same elements to simplify the repeated description.

受電コイル33の形状は、図9に示す様に円形状をしている。実施形態1と同様に、位置決め部材12と送電コイル14の内周縁形状は、送電コイル14の内周縁の方がわずかに曲率半径は小さいが、ほぼ同一の曲線形状をしており、かつ補聴器筐体2の外縁形状もほぼそれに近い形状をしている。その結果、補聴器筐体2の外周部は位置決め部材12の内壁にほぼ沿った位置に位置決めされ、結果として補聴器筐体2内部に配置された長円形状の受電コイル33は、送電コイル14の内周縁に沿った形で、かつその内周縁に近い位置に配置される。   The shape of the power receiving coil 33 is circular as shown in FIG. Similar to the first embodiment, the inner peripheral edge shape of the positioning member 12 and the power transmission coil 14 is substantially the same curved shape, although the inner peripheral edge of the power transmission coil 14 has a slightly smaller radius of curvature, and has a hearing aid housing. The outer edge shape of the body 2 is also almost similar to that. As a result, the outer peripheral portion of the hearing aid housing 2 is positioned at a position substantially along the inner wall of the positioning member 12, and as a result, the oval power receiving coil 33 disposed inside the hearing aid housing 2 It is arranged at a position along the periphery and close to the inner periphery.

比較例1においても、補聴器32の外縁形状および位置決め部材12の形状は、実施の形態1と同一なので、実施形態1と同様に、使用者は補聴器32を送電装置10にセットするときに、補聴器32の角度や位置をあまり気にする事無く操作可能である。   Also in Comparative Example 1, the outer edge shape of the hearing aid 32 and the shape of the positioning member 12 are the same as those in the first embodiment. Therefore, as in the first embodiment, when the user sets the hearing aid 32 to the power transmission device 10, the hearing aid 32 It can be operated without worrying too much about the angle and position of 32.

この構成の非接触電力伝送装置について、上記実施の形態の装置と比較するために、実施の形態1と同様に、送電コイル14が形成する面と受電コイル33が形成する面との距離hを5mmに保持して、送電コイル14の中心軸と受電コイル33の中心軸間のコイル中心間距離r(mm)を変化させて、コイル間の電送効率を測定した。コイル中心間距離r(mm)の定義は、図9に示す様に、送電コイル14の中心から受電コイル33の中心までの距離である。それ以外は、実施の形態1の場合と同様に諸元を設定した。   In order to compare the contactless power transmission device having this configuration with the device of the above embodiment, the distance h between the surface formed by the power transmission coil 14 and the surface formed by the power reception coil 33 is set as in the first embodiment. Holding at 5 mm, the coil center distance r (mm) between the central axis of the power transmission coil 14 and the central axis of the power receiving coil 33 was changed, and the power transmission efficiency between the coils was measured. The definition of the distance r (mm) between the coil centers is a distance from the center of the power transmission coil 14 to the center of the power reception coil 33 as shown in FIG. Other than that, the specifications were set in the same manner as in the first embodiment.

測定の結果を、図11に比較例1の特性線で示す。同図から明らかな様に、比較例1の非接触電力伝送装置の場合、送電装置ケース11内で補聴器32(受電装置)の位置決め尤度が大きいにも関わらず、相対中心軸間距離(r/rm)は0.6から0.83の範囲になるように設計されており、自動的に送電コイル14と受電コイル33間の電送効率は、最大かそれに近い値が得られる構成になっている。しかし、その最大値は17%程度しかない。従って、受電コイルは、上記実施の形態の場合のように、湾曲長円形もしくは長円形状が望ましいことが判る。   The measurement results are shown in FIG. As can be seen from the figure, in the case of the non-contact power transmission device of Comparative Example 1, the relative center axis distance (r) although the positioning likelihood of the hearing aid 32 (power receiving device) is large in the power transmission device case 11. / Rm) is designed to be in the range of 0.6 to 0.83, and the transmission efficiency between the power transmission coil 14 and the power reception coil 33 is automatically configured to obtain a maximum value or a value close thereto. Yes. However, the maximum value is only about 17%. Therefore, it can be seen that the power receiving coil is preferably a curved oval or oval shape as in the case of the above embodiment.

ここで、受電コイルの有効面積S1を、受電コイルの内径、外径の中間部より内側の面積と定義し、送電コイルの有効面積S2を、平均半径rmより内側の面と定義すると、この比較例1では、S1/S2=0.01となる。それに対して、実施の形態1,2ではS1/S2の値がそれぞれ0.11、0.05である。従って、S1/S2の値は、0.05以上であることが望ましい。また、一般的に磁界強度は、コイルの内周縁接線方向に添って強くなる。   Here, when the effective area S1 of the power receiving coil is defined as an area inside the intermediate portion of the inner diameter and the outer diameter of the power receiving coil, and the effective area S2 of the power transmitting coil is defined as a surface inside the average radius rm, this comparison is made. In Example 1, S1 / S2 = 0.01. On the other hand, in the first and second embodiments, the values of S1 / S2 are 0.11 and 0.05, respectively. Therefore, the value of S1 / S2 is desirably 0.05 or more. In general, the magnetic field strength increases along the direction of the inner peripheral edge of the coil.

<比較例2>
上記各実施の形態による効果を検証するために行った、比較例2の非接触電力伝送装置に関する測定について、以下に説明する。比較例2の非接触電力伝送装置の構成は、図10の平面図に示すとおりである。この装置は、図7に示した実施の形態2の場合と同様の補聴器(受電装置)22に対して電力伝送するように構成されている。
<Comparative example 2>
The measurement regarding the non-contact electric power transmission apparatus of the comparative example 2 performed in order to verify the effect by said each embodiment is demonstrated below. The configuration of the non-contact power transmission apparatus of Comparative Example 2 is as shown in the plan view of FIG. This device is configured to transmit power to a hearing aid (power receiving device) 22 similar to that of the second embodiment shown in FIG.

この比較例2の装置は、送電装置34における送電装置ケース35が実施の形態の場合と異なり、補聴器22に対する位置決め部材が設けられていない。従って、補聴器22内の長円形状の受電コイル23の長軸を縦方向に配列させても、送電装置34と補聴器22が干渉しない構造になっている。それ以外の構成は、実施の形態2と同様である。従って、同一の要素については同一の参照番号を付して、説明の繰り返しを簡略化する。   Unlike the case of the power transmission device case 35 in the power transmission device 34 in the device of the comparative example 2, the positioning member for the hearing aid 22 is not provided. Therefore, the power transmission device 34 and the hearing aid 22 do not interfere with each other even if the long axis of the oval power receiving coil 23 in the hearing aid 22 is arranged in the vertical direction. Other configurations are the same as those in the second embodiment. Therefore, the same reference numerals are assigned to the same elements to simplify the repeated description.

この構成の非接触電力伝送装置について、上記実施の形態の装置と比較するために、送電コイル14が形成する面と受電コイル23が形成する面との距離hを5mmに保持し、図10に矢印で示す様に縦方向の移動に限定して、送電コイル14の中心軸と受電コイル23の中心軸間のコイル中心間距離r(mm)を変化させて、コイル間の電送効率を測定した。   In order to compare the non-contact power transmission device having this configuration with the device of the above embodiment, the distance h between the surface formed by the power transmission coil 14 and the surface formed by the power reception coil 23 is maintained at 5 mm, as shown in FIG. As indicated by the arrows, the transmission efficiency between the coils was measured by changing the distance r (mm) between the coil centers between the central axis of the power transmission coil 14 and the central axis of the power receiving coil 23, limited to the vertical movement. .

コイル中心間距離r(mm)の定義は、図10に示す様に、送電コイル14の中心軸から受電コイル23の中心までの距離である。それ以外は、実施の形態1の場合と同様に諸元を設定した。受電コイル23の中心の定義は、実施形態2と同一とした。   The definition of the coil center distance r (mm) is a distance from the central axis of the power transmission coil 14 to the center of the power reception coil 23 as shown in FIG. Other than that, the specifications were set in the same manner as in the first embodiment. The definition of the center of the power receiving coil 23 is the same as that in the second embodiment.

測定の結果を、図11に比較例2の特性線により示す。同図から明らかな様に、比較例2の非接触電力伝送装置の場合、相対中心軸間距離(r/rm)の値を変えても、送電コイル14と受電コイル23間の伝達効率は、最大30%程度で、あまり伝達効率が向上しない事が分かった。   The measurement results are shown in FIG. As is clear from the figure, in the case of the non-contact power transmission device of Comparative Example 2, even if the value of the relative center axis distance (r / rm) is changed, the transmission efficiency between the power transmission coil 14 and the power reception coil 23 is It was found that the transmission efficiency does not improve much at a maximum of about 30%.

ここで、比較例1で述べた受電コイルの有効面積S1と、送電コイルの有効面積S2の比率は、実施の形態2と同様にS1/S2=0.05であるが、長円の長軸の向きが、送電コイルの接線方向に添う形状ではない。受電コイルの形状を長円形状にしても、その長軸向きが、送電コイルの接線形状に添う配置でないと、送電コイルと受電コイル間の伝達効率が向上しないことが判る。   Here, the ratio of the effective area S1 of the power receiving coil and the effective area S2 of the power transmitting coil described in Comparative Example 1 is S1 / S2 = 0.05 as in the second embodiment. Is not a shape that follows the tangential direction of the power transmission coil. It can be seen that even if the shape of the power receiving coil is an ellipse, the transmission efficiency between the power transmitting coil and the power receiving coil cannot be improved unless the direction of the major axis is arranged to follow the tangential shape of the power transmitting coil.

<実施の形態3>
実施の形態3における非接触電力伝送装置の構成について、図12を参照して説明する。本実施の形態も、受電装置を構成する小型の機器の一例として補聴器を対象とし、補聴器に対して電力伝送するために構成された非接触電力伝送装置に関するものである。図12は、補聴器(受電装置)1を含む非接触電力伝送装置の構成を示す平面図である。本実施の形態の構成は、送電装置24における位置決め部材25が、矩形の角が丸くなった形状である以外は、実施の形態1と同様である。従って、同一の要素については同一の参照番号を付して、説明の繰り返しを簡略化する。
<Embodiment 3>
The configuration of the non-contact power transmission apparatus in Embodiment 3 will be described with reference to FIG. The present embodiment also relates to a non-contact power transmission device configured to transmit power to a hearing aid, targeting a hearing aid as an example of a small device constituting the power receiving device. FIG. 12 is a plan view showing a configuration of a non-contact power transmission device including a hearing aid (power receiving device) 1. The configuration of the present embodiment is the same as that of the first embodiment except that the positioning member 25 in the power transmission device 24 has a shape in which a rectangular corner is rounded. Therefore, the same reference numerals are assigned to the same elements to simplify the repeated description.

上記構成でも、実施の形態1とほぼ同様の効果が期待できる。すなわち、補聴器1の外周形状は、送電コイル14の内周形状とほぼ同一の曲線形状をしており、その結果、補聴器筐体2の外周部は位置決め部材25の内壁にほぼ沿った位置に位置決めされる。その結果、補聴器筐体2内部に配置された湾曲長円形状の受電コイル6は、送電コイル14の形状に沿った形でかつ、実施の形態1,2と同様の、送電コイル14に対する相対位置に配置される。   Even in the above configuration, substantially the same effect as in the first embodiment can be expected. That is, the outer peripheral shape of the hearing aid 1 is substantially the same curved shape as the inner peripheral shape of the power transmission coil 14, and as a result, the outer peripheral portion of the hearing aid housing 2 is positioned at a position substantially along the inner wall of the positioning member 25. Is done. As a result, the curved ellipse-shaped receiving coil 6 arranged inside the hearing aid housing 2 has a shape along the shape of the power transmitting coil 14 and the same relative position to the power transmitting coil 14 as in the first and second embodiments. Placed in.

以上のように、送電コイル14の内周形状に対して、位置決め部材25の形状あるいは受電装置(補聴器)筐体の外周縁形状の少なくともいずれかが、ほぼ同一形状であれば、本発明の効果が得られる。   As described above, if at least one of the shape of the positioning member 25 and the outer peripheral edge shape of the power receiving device (hearing aid) housing is substantially the same as the inner peripheral shape of the power transmission coil 14, the effect of the present invention. Is obtained.

実施の形態3においても、実施の形態1と同様に、使用者が補聴器を送電装置にセットするときに、補聴器の位置や姿勢について厳密な調整を行うことが不要でありながら、自動的に送電コイルと受電コイル間の電送効率として最大かそれに近い値が得られる。従って、操作時の負担が少ない。   In the third embodiment, as in the first embodiment, when the user sets the hearing aid to the power transmission device, it is not necessary to strictly adjust the position and orientation of the hearing aid, but the power is automatically transmitted. The maximum or close value is obtained as the transmission efficiency between the coil and the receiving coil. Therefore, the burden on operation is small.

<実施の形態4>
実施の形態4における非接触電力伝送装置の構成について、図13を参照して説明する。本実施の形態は、受電装置を構成する機器の一例としてL字型充電式懐中電灯26を対象とし、電力伝送するために構成された非接触電力伝送装置に関するものである。図13は、L字型充電式懐中電灯26を含む非接触電力伝送装置の構成を示す平面図である。
<Embodiment 4>
The configuration of the non-contact power transmission apparatus in the fourth embodiment will be described with reference to FIG. The present embodiment relates to an L-shaped rechargeable flashlight 26 as an example of a device constituting the power receiving device, and relates to a non-contact power transmission device configured to transmit power. FIG. 13 is a plan view showing the configuration of the non-contact power transmission device including the L-shaped rechargeable flashlight 26.

L字型充電式懐中電灯26は、長円形状を有する受電コイル27が、矩形状の筐体(受電コイル収容ケース)28内に収納された構成を有する。L字型充電式懐中電灯26について、受電コイル27以外に図示はしないが、コイン型2次電池、受電コイル27により発生する交流電流を整流する整流回路、およびコイン型2次電池への充放電制御を行う充放電制御回路、等が構成要素として含まれる。   The L-shaped rechargeable flashlight 26 has a configuration in which a power receiving coil 27 having an oval shape is housed in a rectangular housing (power receiving coil housing case) 28. The L-shaped rechargeable flashlight 26 is not shown other than the power receiving coil 27, but the coin-type secondary battery, a rectifier circuit that rectifies an alternating current generated by the power receiving coil 27, and charging / discharging of the coin-type secondary battery A charge / discharge control circuit that performs control is included as a component.

実施形態1、2と異なり、筐体(受電コイル収容ケース)28、送電装置29に設けられた位置決め部材30および送電コイル31は、直線状の構成からなる矩形形状あるいは矩形形状の集合体である。しかし、結果として、それらは送電コイル31の一部形状と同一の直線形状をしており、その結果、筐体28の外周部は、位置決め部材30の内壁にほぼ沿った位置に位置決めされる。その結果、筐体28内部に配置された長円形状を有する受電コイル27は、送電コイル31の内周エッジ部に近い内周側に配置される。   Unlike the first and second embodiments, the casing (power receiving coil housing case) 28, the positioning member 30 provided in the power transmission device 29, and the power transmission coil 31 are a rectangular shape or a rectangular aggregate having a linear configuration. . However, as a result, they have the same linear shape as the partial shape of the power transmission coil 31, and as a result, the outer peripheral portion of the housing 28 is positioned at a position substantially along the inner wall of the positioning member 30. As a result, the power receiving coil 27 having an oval shape disposed inside the housing 28 is disposed on the inner peripheral side near the inner peripheral edge portion of the power transmitting coil 31.

本実施の形態では、一例として、送電コイル31のX軸中心から、送電コイル31の上方コイル部の外側と内側の平均位置までの距離をコイル平均距離をxmとすると、受電コイル27の長円X軸中心と送電コイル31のX軸中心までの距離xは、約0.6xmから0.7xmとする。   In the present embodiment, as an example, if the coil average distance is xm, the distance from the X-axis center of the power transmission coil 31 to the outer and inner average positions of the upper coil portion of the power transmission coil 31 is an ellipse of the power reception coil 27. The distance x from the center of the X axis to the center of the X axis of the power transmission coil 31 is about 0.6xm to 0.7xm.

これにより、実施の形態1,2と同様に、使用者がL字型充電式懐中電灯を送電装置にセットするときに、L字型充電式懐中電灯の位置や姿勢について厳密な調整を行うことが不要でありながら、自動的に送電コイルと受電コイル間の電送効率として最大かそれに近い値が得られる。従って、操作時の負担が少ない。   Thus, as in the first and second embodiments, when the user sets the L-shaped rechargeable flashlight on the power transmission device, the position and orientation of the L-shaped rechargeable flashlight must be strictly adjusted. Is automatically obtained, the maximum or close value is obtained as the transmission efficiency between the power transmission coil and the power reception coil. Therefore, the burden on operation is small.

本発明によれば、装置操作の負担が少なく、しかも簡素な構造でありながら十分な伝送効率が得られるので、補聴器、携帯電話やデジタルカメラ等のモバイル機器等の小型機器の非接触電力伝送に好適である。   According to the present invention, the burden of device operation is small, and sufficient transmission efficiency can be obtained while having a simple structure. Therefore, it can be used for non-contact power transmission of small devices such as hearing aids, mobile devices such as mobile phones and digital cameras. Is preferred.

1、22、32 補聴器(受電装置)
2 補聴器筐体(受電コイル収納ケース)
3 イアホン
4 連結部
5 コイン型2次電池
6、23、27、33 受電コイル
10、24、34、36 送電装置
11、35、37 送電装置ケース
12、25、30 位置決め部材
13 送電コイル収納部
14、31、38 送電コイル
15、20 電磁シールド部材
16 高周波ドライバー
17 制御回路
18 ヒンジ
19 蓋
21 蓋部内壁
26 L字型充電式懐中電灯
28 筐体
39 補聴器装着凹部
40 位置決め凸部
1, 22, 32 Hearing aid (power receiving device)
2 Hearing aid housing (receiving coil storage case)
3 Earphone 4 Connecting portion 5 Coin-type secondary battery 6, 23, 27, 33 Power receiving coil 10, 24, 34, 36 Power transmitting device 11, 35, 37 Power transmitting device case 12, 25, 30 Positioning member 13 Power transmitting coil storage portion 14 , 31, 38 Power transmission coil 15, 20 Electromagnetic shield member 16 High frequency driver 17 Control circuit 18 Hinge 19 Lid 21 Lid inner wall 26 L-shaped rechargeable flashlight 28 Housing 39 Hearing aid mounting concave part 40 Positioning convex part

Claims (6)

共振コイルを含む送電コイルを有する送電装置と、
共振コイルを含む受電コイルを有する受電装置とを備え、
前記送電コイルと前記受電コイルの間の磁界共鳴を介して前記送電装置から前記受電装置へ電力を伝送する非接触電力伝送装置において、
前記送電装置は、少なくとも1個の前記送電コイルの少なくとも一部分の内周縁に沿った周縁形状を有する位置決め部を備え、
前記受電装置は、前記受電コイルを収納する受電コイル収納ケースを備え、
前記受電コイル収納ケースは外周縁の少なくとも一部が前記位置決め部の周縁形状に沿った位置基準面を形成し、
前記受電コイルは、ループ形状が、長円形であるか、または長円形の長径方向の外周縁が湾曲した湾曲長円形であり、その長径方向の外周縁の少なくとも一部は前記受電コイル収納ケースの位置基準面に沿うように収納されていることを特徴とする非接触電力伝送装置。
A power transmission device having a power transmission coil including a resonance coil;
A power receiving device having a power receiving coil including a resonant coil,
In a non-contact power transmission device that transmits power from the power transmission device to the power reception device via magnetic resonance between the power transmission coil and the power reception coil,
The power transmission device includes a positioning portion having a peripheral shape along an inner peripheral edge of at least a part of at least one of the power transmission coils,
The power receiving device includes a power receiving coil storage case for storing the power receiving coil,
The power receiving coil storage case forms a position reference surface in which at least a part of the outer peripheral edge follows the peripheral shape of the positioning part,
The power receiving coil has an oval loop shape or a curved oval shape with a curved outer periphery in the major axis direction of the ellipse, and at least a part of the outer periphery in the major axis direction of the power receiving coil storage case. A non-contact power transmission device that is housed along a position reference plane.
前記受電装置位置決め部は、前記送電装置に装着された前記受電装置を平面内方向における周囲を包囲する形状を有する請求項1記載の非接触電力伝送装置。   The non-contact power transmission device according to claim 1, wherein the power receiving device positioning unit has a shape surrounding the power receiving device mounted on the power transmitting device in an in-plane direction. 前記送電コイルの形状は、円形もしくは正多角形である請求項2記載の非接触電力伝送装置。   The contactless power transmission device according to claim 2, wherein the shape of the power transmission coil is a circle or a regular polygon. 前記位置決め部による前記受電コイル収納ケースの位置決め形態は、複数の形態を採ることが可能である請求項1記載の非接触電力伝送装置。   The contactless power transmission device according to claim 1, wherein a positioning form of the power receiving coil storage case by the positioning unit can take a plurality of forms. 前記位置決め部により前記受電コイル収納ケースが位置決めされ、その結果、前記受電コイルが、前記送電コイルのループ形状の内周縁に対して位置決めされる請求項1〜3のいずれか1項記載の非接触電力伝送装置。   The non-contact according to any one of claims 1 to 3, wherein the power receiving coil storage case is positioned by the positioning portion, and as a result, the power receiving coil is positioned with respect to an inner periphery of the loop shape of the power transmitting coil. Power transmission device. 前記位置決め部により決定される前記受電コイルと前記送電コイルの相対位置は、前記送電コイルから前記受電コイルへの電力伝送効率が、前記送電コイルと平行な面内において最大になるよう設定されている請求項5記載の非接触電力伝送装置。   The relative positions of the power reception coil and the power transmission coil determined by the positioning unit are set such that the power transmission efficiency from the power transmission coil to the power reception coil is maximized in a plane parallel to the power transmission coil. The contactless power transmission device according to claim 5.
JP2011222797A 2011-10-07 2011-10-07 Non-contact power transmission device Pending JP2013085351A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013223262A (en) * 2012-04-12 2013-10-28 Hitachi Cable Ltd Resonance type non-contact feeding system
JP2015092809A (en) * 2013-10-04 2015-05-14 Tdk株式会社 Power receiving device and power supply device
JPWO2017037811A1 (en) * 2015-08-28 2018-08-02 Tdk株式会社 Non-contact power feeding device and non-contact power transmission device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013223262A (en) * 2012-04-12 2013-10-28 Hitachi Cable Ltd Resonance type non-contact feeding system
JP2015092809A (en) * 2013-10-04 2015-05-14 Tdk株式会社 Power receiving device and power supply device
JPWO2017037811A1 (en) * 2015-08-28 2018-08-02 Tdk株式会社 Non-contact power feeding device and non-contact power transmission device
US10439424B2 (en) 2015-08-28 2019-10-08 Tdk Corporation Non-contact power supply device and non-contact power transmission device

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