JP2021175256A - Wireless power supply device - Google Patents

Wireless power supply device Download PDF

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JP2021175256A
JP2021175256A JP2020076708A JP2020076708A JP2021175256A JP 2021175256 A JP2021175256 A JP 2021175256A JP 2020076708 A JP2020076708 A JP 2020076708A JP 2020076708 A JP2020076708 A JP 2020076708A JP 2021175256 A JP2021175256 A JP 2021175256A
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power
unit
electrode unit
power transmission
transmission electrode
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中 市川
Ataru Ichikawa
聡史 田中
Satoshi Tanaka
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Denso Corp
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Denso Corp
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Abstract

To provide a wireless power supply device which improves power transmission efficiency and reduces apparatus damage by turning on and turning off supply of power on the basis of overlapping of a power transmitting electrode part at a facility side and a power receiving electrode part of a movable apparatus.SOLUTION: A wireless power supply device 10 comprises a power transmitting electrode part 21, a movable apparatus 12, a power receiving electrode part 22, a detection section 23 and a control section 24. The power transmitting electrode part 21 is provided in a facility 11 which is a stationary side, and supplies power. The movable electrode apparatus 12 is movable with respect to the facility 11. The power receiving electrode part 22 is provided in the movable apparatus 12 and faces the power transmitting electrode part 21, thereby receiving power from the power transmitting electrode part 21 in a non-contact manner. The detection section 23 detects overlapping of the power transmitting electrode part 21 and the power receiving electrode part 22 as an overlap amount. On the basis of the overlap amount detected by the detection section 23, the control section 24 controls start and end of power supply from the power transmitting electrode part 21.SELECTED DRAWING: Figure 1

Description

本実施形態は、無線給電装置に関する。 The present embodiment relates to a wireless power supply device.

例えばＡＧＶ（Automated Guided Vehicle）、ロボットあるいはドローンなどの可動機器を有する設備は、これらの可動機器への電力の供給が必要である。この電力の供給の手法として、電磁誘導、磁界結合あるいは電界結合など、多様な無線給電の手法が提案されている。このような無線給電を利用する場合、電力を供給する固定側の設備と、電力を受け取る可動機器側との間では送電効率を向上するために整合回路によって例えばインピーダンス整合が図られる。無線給電装置は、設備から可動機器へ電力を供給するときオンになり、電力の供給が不要なときオフされる（無線給電に関して特許文献１〜３参照）。 For example, equipment having mobile devices such as AGVs (Automated Guided Vehicles), robots, and drones needs to supply electric power to these mobile devices. As a method of supplying this electric power, various wireless power feeding methods such as electromagnetic induction, magnetic field coupling, and electric field coupling have been proposed. When such wireless power supply is used, impedance matching is achieved, for example, by a matching circuit in order to improve transmission efficiency between the equipment on the fixed side that supplies electric power and the mobile device side that receives electric power. The wireless power supply device is turned on when power is supplied from the equipment to the mobile device, and is turned off when the power supply is not required (see Patent Documents 1 to 3 regarding wireless power supply).

しかしながら、設備側の送電電極部と可動機器側の受電電極部との物理的な重なりが不完全な状態で電力の供給をオンすると、送電効率の低下や電力の反射にともなう機器の損傷の原因となる。また、無線給電装置は、電力を供給する対象となる可動機器の数にあわせて、整合回路を切り替え、送電効率の向上を図っている。このような場合にも、可動機器が受電可能な状態となる前に電力の供給をオンすると、送電効率の低下や機器の損傷を招くおそれがある。 However, if the power supply is turned on when the physical overlap between the power transmission electrode on the equipment side and the power receiving electrode on the mobile device side is incomplete, the power transmission efficiency may drop and the equipment may be damaged due to power reflection. It becomes. In addition, the wireless power supply device switches matching circuits according to the number of mobile devices to which power is supplied to improve power transmission efficiency. Even in such a case, if the power supply is turned on before the movable device is ready to receive power, the power transmission efficiency may be lowered or the device may be damaged.

特開２０１３−１１５９０９号公報Japanese Unexamined Patent Publication No. 2013-115909 特開２０１６−０２７７８２号公報Japanese Unexamined Patent Publication No. 2016-027782 特開２０１７−１８４４３８号公報Japanese Unexamined Patent Publication No. 2017-184438

そこで、設備側の送電電極部と可動機器の受電電極部との重なりに基づいて電力の供給をオンおよびオフすることにより、送電効率を向上し、機器の損傷が低減される無線給電装置を提供することを目的とする。 Therefore, we provide a wireless power supply device that improves power transmission efficiency and reduces damage to equipment by turning on and off the power supply based on the overlap between the power transmission electrode on the equipment side and the power receiving electrode on the mobile device. The purpose is to do.

上記の課題を解決するために一実施形態の無線給電装置は、固定側の送電電極部と可動機器側の受電電極部との重なりをオーバラップ量として検出部で検出する。制御部は、検出部で検出したオーバラップ量に基づいて、送電電極部から受電電極部への電力の供給開始および供給終了を制御する。これにより、制御部は、設備の送電電極部と可動機器の受電電極部とが十分に重なり合ってオーバラップ量が大きくなると電力の供給を開始する。これとともに、制御部は、オーバラップ量が小さくなると電力の供給を終了する。その結果、送電電極部から受電電極部への電力の供給は、設備側の送電電極部と可動機器の受電電極部との重なりであるオーバラップ量に基づいてオンおよびオフされる。したがって、送電効率を向上することができるとともに、電力の反射などにともなう機器の損傷を低減することができる。 In order to solve the above problems, in the wireless power feeding device of one embodiment, the detection unit detects the overlap between the power transmission electrode portion on the fixed side and the power receiving electrode portion on the movable device side as an overlap amount. The control unit controls the start and end of supply of electric power from the power transmission electrode unit to the power reception electrode unit based on the amount of overlap detected by the detection unit. As a result, the control unit starts supplying electric power when the power transmission electrode portion of the equipment and the power receiving electrode portion of the movable device sufficiently overlap each other and the overlap amount becomes large. At the same time, the control unit ends the power supply when the overlap amount becomes small. As a result, the supply of electric power from the power transmission electrode unit to the power reception electrode unit is turned on and off based on the amount of overlap, which is the overlap between the power transmission electrode unit on the equipment side and the power reception electrode unit of the movable device. Therefore, it is possible to improve the power transmission efficiency and reduce the damage to the equipment due to the reflection of electric power.

第1実施形態による無線給電装置の構成を示すブロック図Block diagram showing the configuration of the wireless power supply device according to the first embodiment 第1実施形態による無線給電装置を適用した設備を示す模式図Schematic diagram showing equipment to which the wireless power supply device according to the first embodiment is applied. 第１実施形態による無線給電装置の可動機器およびその近傍を拡大した模式図Schematic diagram of the movable device of the wireless power feeding device according to the first embodiment and its vicinity enlarged. 図３の矢印IV方向から見た模式図Schematic diagram seen from the direction of arrow IV in FIG. 第１実施形態による無線給電装置において、可動機器とオーバラップ量との関係を説明する模式図Schematic diagram illustrating the relationship between the movable device and the overlap amount in the wireless power feeding device according to the first embodiment. 第１実施形態による無線給電装置において、可動機器とオーバラップ量との関係を説明する模式図Schematic diagram illustrating the relationship between the movable device and the overlap amount in the wireless power feeding device according to the first embodiment. 第１実施形態による無線給電装置において、可動機器とオーバラップ量との関係を説明する模式図Schematic diagram illustrating the relationship between the movable device and the overlap amount in the wireless power feeding device according to the first embodiment. 第２実施形態による無線給電装置の構成を示すブロック図Block diagram showing the configuration of the wireless power supply device according to the second embodiment 第３実施形態による無線給電装置の構成を示すブロック図Block diagram showing the configuration of the wireless power supply device according to the third embodiment

以下、無線給電装置の複数の実施形態について図面に基づいて説明する。なお、複数の実施形態において、実質的に共通する構成部位には同一の符号を付し、説明を省略する。
（第１実施形態）
図１および図２に示すように第１実施形態による無線給電装置１０は、例えば工場などの設備１１に用いられる。設備１１は、固定側であり、複数の可動機器１２および給電ステーション１３を備えている。第１実施形態の場合、可動機器１２は、例えば工場などの設備１１において部品や製品を運搬するＡＧＶである。給電ステーション１３は、設備１１において予め設定された位置に設けられており、可動機器１２に電力を供給する。給電ステーション１３は、１台または複数台の可動機器１２に電力を供給する。可動機器１２は、設備１１に設定されている移動路１４に沿って移動する。なお、設備１１としての工場および可動機器１２としてのＡＧＶなどは、無線給電装置１０を適用する一例である。可動機器１２は、例えば固定された設備１１に相当するレールに沿って移動するロボットの可動部など、固定の設備１１に対して移動可能であれば任意の機器とすることができる。 Hereinafter, a plurality of embodiments of the wireless power feeding device will be described with reference to the drawings. In addition, in a plurality of embodiments, substantially common constituent parts are designated by the same reference numerals, and the description thereof will be omitted.
(First Embodiment)
As shown in FIGS. 1 and 2, the wireless power feeding device 10 according to the first embodiment is used for equipment 11 such as a factory. The equipment 11 is on the fixed side and includes a plurality of movable devices 12 and a power supply station 13. In the case of the first embodiment, the movable device 12 is an AGV that transports parts and products in equipment 11 such as a factory. The power supply station 13 is provided at a preset position in the equipment 11 to supply electric power to the movable device 12. The power supply station 13 supplies electric power to one or a plurality of mobile devices 12. The movable device 12 moves along the moving path 14 set in the equipment 11. The factory as the equipment 11 and the AGV as the movable device 12 are examples in which the wireless power feeding device 10 is applied. The movable device 12 can be any device as long as it can be moved with respect to the fixed equipment 11, such as a movable part of a robot that moves along a rail corresponding to the fixed equipment 11.

無線給電装置１０は、図１に示すように上述の可動機器１２に加え、送電電極部２１、受電電極部２２、検出部２３および制御部２４を備えている。第１実施形態の場合、送電電極部２１は、設備１１の給電ステーション１３に設けられている。第１実施形態の場合、送電電極部２１は、例えば金属板などで形成され、設備１１の床面２５に設置されている。送電電極部２１は、設備１１の床面２５に限らず、壁面などに設置してもよい。このように、送電電極部２１は、設備１１に固定されている。送電電極部２１は、一対の送電電極部材２６を有している。送電電極部２１を構成する一対の送電電極部材２６は、設備１１の給電ステーション１３においてほぼ平行に設けられている。 As shown in FIG. 1, the wireless power feeding device 10 includes a power transmission electrode unit 21, a power receiving electrode unit 22, a detection unit 23, and a control unit 24, in addition to the above-mentioned movable device 12. In the case of the first embodiment, the power transmission electrode unit 21 is provided at the power supply station 13 of the equipment 11. In the case of the first embodiment, the power transmission electrode portion 21 is formed of, for example, a metal plate and is installed on the floor surface 25 of the equipment 11. The power transmission electrode portion 21 is not limited to the floor surface 25 of the equipment 11, and may be installed on a wall surface or the like. In this way, the power transmission electrode portion 21 is fixed to the equipment 11. The power transmission electrode unit 21 has a pair of power transmission electrode members 26. The pair of power transmission electrode members 26 constituting the power transmission electrode unit 21 are provided substantially in parallel at the power supply station 13 of the equipment 11.

受電電極部２２は、可動機器１２に設けられている。具体的には、受電電極部２２は、例えば金属板などで形成され、図３および図４に示すように可動機器１２の本体２７において、底面側すなわち設備１１の床面２５側に設けられている。受電電極部２２は、一対の受電電極部材２８を有している。可動機器１２が設備１１の給電ステーション１３に移動すると、可動機器１２の受電電極部２２は設備１１の送電電極部２１と対向する。このとき、受電電極部２２は、送電電極部２１との間に空間を形成しつつ対向する。これにより、受電電極部２２は、送電電極部２１との間に誘電体である空気を挟み込む。 The power receiving electrode portion 22 is provided on the movable device 12. Specifically, the power receiving electrode portion 22 is formed of, for example, a metal plate, and is provided on the bottom surface side of the main body 27 of the movable device 12, that is, on the floor surface 25 side of the equipment 11 as shown in FIGS. 3 and 4. There is. The power receiving electrode unit 22 has a pair of power receiving electrode members 28. When the movable device 12 moves to the power supply station 13 of the equipment 11, the power receiving electrode portion 22 of the movable device 12 faces the power transmission electrode portion 21 of the equipment 11. At this time, the power receiving electrode unit 22 faces the power transmission electrode unit 21 while forming a space. As a result, the power receiving electrode unit 22 sandwiches air, which is a dielectric, between the power receiving electrode unit 22 and the power transmission electrode unit 21.

図１に示すように検出部２３および制御部２４は、固定側の設備１１に設けられている。無線給電装置１０は、これらに加え、固定側の設備１１に、電源３１、高周波生成部３２および整合器３３を備えている。高周波生成部３２は、例えばインバータなどを有しており、電源３１からの電力を用いて高周波を生成する。高周波生成部３２で生成した高周波は、送電電極部２１へ供給される。送電電極部２１と受電電極部２２とが対向しているとき、送電電極部２１へ高周波を供給することにより、例えば電界結合や磁界結合によって送電電極部２１から受電電極部２２へ非接触で電力が供給される。すなわち、電力は、固定側の設備１１から移動側の可動機器１２へ無線による非接触で供給される。 As shown in FIG. 1, the detection unit 23 and the control unit 24 are provided in the equipment 11 on the fixed side. In addition to these, the wireless power supply device 10 includes a power supply 31, a high frequency generator 32, and a matching unit 33 in the equipment 11 on the fixed side. The high frequency generation unit 32 has, for example, an inverter or the like, and generates high frequencies by using the electric power from the power source 31. The high frequency generated by the high frequency generation unit 32 is supplied to the power transmission electrode unit 21. When the power transmission electrode unit 21 and the power reception electrode unit 22 face each other, power is supplied to the power transmission electrode unit 21 in a non-contact manner from the power transmission electrode unit 21 to the power reception electrode unit 22 by, for example, electric field coupling or magnetic field coupling. Is supplied. That is, electric power is wirelessly and non-contactly supplied from the equipment 11 on the fixed side to the movable device 12 on the mobile side.

整合器３３は、図示しない電気的な複数の整合回路を有している。無線給電装置１０は、送電電極部２１から受電電極部２２へ電力を供給するとき、例えばインピーダンスなどの整合を図る必要がある。この送電電極部２１と受電電極部２２との間の整合は、給電ステーション１３において電力の供給を受ける可動機器１２の種類や台数によって変化する。整合器３３は、例えばインピーダンスやインダクタンスなどの特性の異なる複数の整合回路を有している。整合器３３は、これら複数の整合回路を条件にあわせて切り替えることにより、送電電極部２１と受電電極部２２との間の整合を最適化する。 The matching device 33 has a plurality of electrical matching circuits (not shown). When the wireless power feeding device 10 supplies electric power from the power transmitting electrode unit 21 to the power receiving electrode unit 22, it is necessary to match the impedance and the like, for example. The alignment between the power transmission electrode unit 21 and the power reception electrode unit 22 changes depending on the type and number of movable devices 12 to which power is supplied at the power supply station 13. The matching device 33 has a plurality of matching circuits having different characteristics such as impedance and inductance. The matching device 33 optimizes the matching between the power transmitting electrode unit 21 and the power receiving electrode unit 22 by switching the plurality of matching circuits according to the conditions.

検出部２３は、送電電極部２１と受電電極部２２との重なりをオーバラップ量Ｍとして検出する。すなわち、検出部２３は、固定側の設備１１に設けられている送電電極部２１と移動側の可動機器１２に設けられている受電電極部２２とが給電ステーション１３において対向しているとき、これらの重なりをオーバラップ量Ｍとして検出する。オーバラップ量Ｍは、可動機器１２の移動とともに変化する。つまり、図５に示すように可動機器１２が給電ステーション１３に進入するとき、オーバラップ量Ｍは可動機器１２の移動とともに「０」から最大値Ｍａへ増加する。図６に示すように可動機器１２が給電ステーション１３に位置しているとき、オーバラップ量Ｍは最大値Ｍａで一定となる。一方、図７に示すように可動機器１２が給電ステーション１３から離脱するとき、オーバラップ量Ｍは可動機器１２の移動とともに最大値Ｍａから「０」へ減少する。検出部２３は、このように給電ステーション１３において可動機器１２の移動とともに変化するオーバラップ量Ｍを検出する。 The detection unit 23 detects the overlap between the power transmission electrode unit 21 and the power reception electrode unit 22 as the overlap amount M. That is, in the detection unit 23, when the power transmission electrode unit 21 provided in the equipment 11 on the fixed side and the power reception electrode unit 22 provided in the movable device 12 on the moving side face each other in the power supply station 13, these The overlap is detected as the overlap amount M. The overlap amount M changes with the movement of the movable device 12. That is, as shown in FIG. 5, when the movable device 12 enters the power feeding station 13, the overlap amount M increases from “0” to the maximum value Ma as the movable device 12 moves. As shown in FIG. 6, when the movable device 12 is located at the power supply station 13, the overlap amount M is constant at the maximum value Ma. On the other hand, as shown in FIG. 7, when the movable device 12 is separated from the power feeding station 13, the overlap amount M decreases from the maximum value Ma to “0” as the movable device 12 moves. In this way, the detection unit 23 detects the overlap amount M that changes with the movement of the movable device 12 at the power supply station 13.

制御部２４は、検出部２３で検出したオーバラップ量Ｍに基づいて、送電電極部２１からの電力の供給開始および供給終了を制御する。制御部２４は、例えば図示しないＣＰＵ、ＲＯＭおよびＲＡＭを有するマイクロコンピュータで構成されている。制御部２４は、ＲＯＭに記憶されているコンピュータプログラムを実行することにより、高周波生成部３２および整合器３３を含む設備１１をソフトウェア的に制御する。なお、制御部２４は、ハードウェア的、またはソフトウェアとハードウェアとの協働によって高周波生成部３２および整合器３３を含む設備１１を制御する構成としてもよい。 The control unit 24 controls the start and end of supply of electric power from the power transmission electrode unit 21 based on the overlap amount M detected by the detection unit 23. The control unit 24 is composed of, for example, a microcomputer having a CPU, a ROM, and a RAM (not shown). The control unit 24 controls the equipment 11 including the high frequency generation unit 32 and the matching unit 33 by software by executing the computer program stored in the ROM. The control unit 24 may be configured to control the equipment 11 including the high frequency generation unit 32 and the matching unit 33 in terms of hardware or in collaboration with software and hardware.

制御部２４は、検出部２３で検出したオーバラップ量Ｍが予め設定した開始設定値Ｍｓ以上になると、送電電極部２１からの電力の供給を開始する。すなわち、制御部２４は、オーバラップ量Ｍが開始設定値Ｍｓ以上、つまりＭ≧Ｍｓのとき、高周波生成部３２をオンにし、高周波生成部３２から送電電極部２１へ電力を供給する。一方、制御部２４は、検出部２３で検出したオーバラップ量Ｍが予め設定した終了設定値Ｍｅ以下になると、送電電極部２１からの電力の供給を終了する。すなわち、制御部２４は、オーバラップ量Ｍが終了設定値Ｍｅ以下、つまりＭ≦Ｍｅのとき、高周波生成部３２をオフにし、高周波生成部３２から送電電極部２１への電力の供給を停止する。開始設定値Ｍｓおよび終了設定値Ｍｅは、同一であってもよく、異なっていてもよい。例えば開始設定値Ｍｓおよび終了設定値Ｍｅをオーバラップ量Ｍの最大値Ｍａの９０％、つまりＭｓ＝Ｍｅ＝Ｍａ×０．９と設定する。そして、制御部２４は、オーバラップ量Ｍが最大値Ｍａの９０％以上つまりＭ≧Ｍａ×０．９になると高周波生成部３２をオンにし、９０％未満つまりＭ＜Ｍａ×０．９になると高周波生成部３２をオフにする構成としてもよい。開始設定値Ｍｓおよび終了設定値Ｍｅは、適用する無線給電装置１０、ならびに設備１１および可動機器１２の性能や特性などにあわせて、オーバラップ量Ｍの最大値Ｍａの９０％に限らず、任意の値に設定することができる。 When the overlap amount M detected by the detection unit 23 becomes equal to or greater than the preset start set value Ms, the control unit 24 starts supplying electric power from the power transmission electrode unit 21. That is, when the overlap amount M is equal to or greater than the start set value Ms, that is, M ≧ Ms, the control unit 24 turns on the high frequency generation unit 32 and supplies power from the high frequency generation unit 32 to the power transmission electrode unit 21. On the other hand, when the overlap amount M detected by the detection unit 23 becomes equal to or less than the preset end set value Me, the control unit 24 ends the supply of electric power from the power transmission electrode unit 21. That is, when the overlap amount M is equal to or less than the end set value Me, that is, when M ≦ Me, the control unit 24 turns off the high frequency generation unit 32 and stops the supply of electric power from the high frequency generation unit 32 to the power transmission electrode unit 21. .. The start set value Ms and the end set value Me may be the same or different. For example, the start set value Ms and the end set value Me are set to 90% of the maximum value Ma of the overlap amount M, that is, Ms = Me = Ma × 0.9. Then, when the overlap amount M is 90% or more of the maximum value Ma, that is, M ≧ Ma × 0.9, the control unit 24 turns on the high frequency generation unit 32, and when it is less than 90%, that is, M <Ma × 0.9. The high frequency generator 32 may be turned off. The start set value Ms and the end set value Me are not limited to 90% of the maximum value Ma of the overlap amount M, and are arbitrary according to the performance and characteristics of the wireless power feeding device 10 to be applied, the equipment 11 and the movable device 12. Can be set to the value of.

可動機器１２は、図１に示すように上述の受電電極部２２に加え、整流回路部４１、コンバータ４２、蓄電部４３、駆動制御部４４および駆動部４５を有している。整流回路部４１は、図示しないコイルやダイオードなどを有しており、受電電極部２２において受け取った高周波の電力を整流する。コンバータ４２は、例えばＤＣ−ＤＣコンバータなどを有しており、整流回路部４１で整流された電力の電圧を調整する。蓄電部４３は、例えば図示しないバッテリやキャパシタなどを有しており、整流および電圧が調整された後の電力を蓄える。駆動制御部４４は、例えば図示しないＣＰＵ、ＲＯＭおよびＲＡＭを有するマイクロコンピュータで構成されている。駆動制御部４４は、ＲＯＭに記憶されているコンピュータプログラムを実行することにより、駆動部４５を含む可動機器１２の全体をソフトウェア的に制御する。なお、駆動制御部４４は、ハードウェア的、またはソフトウェアとハードウェアとの協働によって駆動部４５を含む可動機器１２を制御する構成としてもよい。駆動部４５は、図３に示すようにモータ４６および駆動輪４７などを有しており、蓄電部４３に蓄えられた電力を用いて可動機器１２を駆動するための力を発生する。 As shown in FIG. 1, the movable device 12 includes a rectifier circuit unit 41, a converter 42, a power storage unit 43, a drive control unit 44, and a drive unit 45 in addition to the power receiving electrode unit 22 described above. The rectifier circuit unit 41 has a coil, a diode, and the like (not shown), and rectifies the high-frequency power received by the power receiving electrode unit 22. The converter 42 includes, for example, a DC-DC converter, and adjusts the voltage of the electric power rectified by the rectifier circuit unit 41. The power storage unit 43 has, for example, a battery or a capacitor (not shown), and stores power after rectification and voltage adjustment. The drive control unit 44 is composed of, for example, a microcomputer having a CPU, a ROM, and a RAM (not shown). The drive control unit 44 controls the entire movable device 12 including the drive unit 45 by software by executing a computer program stored in the ROM. The drive control unit 44 may be configured to control the movable device 12 including the drive unit 45 in terms of hardware or in collaboration with software and hardware. As shown in FIG. 3, the drive unit 45 has a motor 46, drive wheels 47, and the like, and uses the electric power stored in the power storage unit 43 to generate a force for driving the movable device 12.

第１実施形態の場合、無線給電装置１０は、図１に示すように位置センサ５１を備えている。位置センサ５１は、設備１１の給電ステーション１３に設けられている。位置センサ５１は、給電ステーション１３における可動機器１２の位置を検出する。位置センサ５１は、例えば光、画像、質量または電磁波などにより、非接触で可動機器１２の位置を検出する。また、位置センサ５１は、例えばスイッチなどのように物理的な接触によって可動機器１２の位置を検出する構成としてもよい。位置センサ５１は、検出した可動機器１２の位置を電気信号として検出部２３へ出力する。検出部２３は、位置センサ５１で検出した可動機器１２の位置に基づいて、送電電極部２１と受電電極部２２とのオーバラップ量Ｍを検出する。送電電極部２１は、設備１１の給電ステーション１３において、床面２５に所定の長さで設けられている。給電ステーション１３での給電時にこの送電電極部２１と対向する受電電極部２２は、可動機器１２に設けられているものの、全長が可動機器１２の本体２７と同一であるとは限らない。一方、可動機器１２の本体２７と受電電極部２２との位置関係は、設計的な値であり既知である。そこで、検出部２３は、位置センサ５１によって可動機器１２の位置を検出するとともに、この可動機器１２の位置と既知である受電電極部２２の位置との関係から、給電ステーション１３における送電電極部２１と受電電極部２２とのオーバラップ量Ｍを検出する。 In the case of the first embodiment, the wireless power feeding device 10 includes a position sensor 51 as shown in FIG. The position sensor 51 is provided at the power supply station 13 of the equipment 11. The position sensor 51 detects the position of the movable device 12 in the power feeding station 13. The position sensor 51 detects the position of the movable device 12 in a non-contact manner by, for example, light, an image, a mass, or an electromagnetic wave. Further, the position sensor 51 may be configured to detect the position of the movable device 12 by physical contact, such as a switch. The position sensor 51 outputs the detected position of the movable device 12 as an electric signal to the detection unit 23. The detection unit 23 detects the overlap amount M between the power transmission electrode unit 21 and the power reception electrode unit 22 based on the position of the movable device 12 detected by the position sensor 51. The power transmission electrode unit 21 is provided on the floor surface 25 with a predetermined length in the power supply station 13 of the equipment 11. Although the power receiving electrode unit 22 facing the power transmission electrode unit 21 at the time of power supply at the power supply station 13 is provided in the movable device 12, the total length is not always the same as the main body 27 of the movable device 12. On the other hand, the positional relationship between the main body 27 of the movable device 12 and the power receiving electrode portion 22 is a design value and is known. Therefore, the detection unit 23 detects the position of the movable device 12 by the position sensor 51, and from the relationship between the position of the movable device 12 and the known position of the power receiving electrode unit 22, the power transmission electrode unit 21 in the power feeding station 13 The amount of overlap M between the power receiving electrode portion 22 and the power receiving electrode portion 22 is detected.

制御部２４は、検出部２３で検出したオーバラップ量Ｍに基づいて、高周波生成部３２のオンおよびオフを制御する。また、検出部２３は、検出したオーバラップ量Ｍから、給電ステーション１３の送電電極部２１から電力の供給を受ける可動機器１２の台数を検出する。制御部２４は、オーバラップ量Ｍに基づいて高周波生成部３２のオンおよびオフを制御するとともに、電力の供給を受ける可動機器１２の台数に応じて整合器３３の整合回路部を切り替える。これにより、給電ステーション１３における可動機器１２の状態に応じて、送電電極部２１と受電電極部２２との間の適切な整合が実行され、送電電極部２１から受電電極部２２への送電効率の向上が図られる。 The control unit 24 controls the on / off of the high frequency generation unit 32 based on the overlap amount M detected by the detection unit 23. Further, the detection unit 23 detects the number of mobile devices 12 that receive power from the power transmission electrode unit 21 of the power supply station 13 from the detected overlap amount M. The control unit 24 controls the on / off of the high frequency generation unit 32 based on the overlap amount M, and switches the matching circuit unit of the matching device 33 according to the number of movable devices 12 to be supplied with electric power. As a result, appropriate matching between the power transmission electrode unit 21 and the power reception electrode unit 22 is executed according to the state of the movable device 12 in the power supply station 13, and the power transmission efficiency from the power transmission electrode unit 21 to the power reception electrode unit 22 is increased. Improvement is planned.

以上説明した第１実施形態では、検出部２３は、設備１１側の送電電極部２１と可動機器１２側の受電電極部２２との重なりを、オーバラップ量Ｍとして検出する。制御部２４は、検出部２３で検出したオーバラップ量Ｍに基づいて、整合器３３の整合回路を切り替えるとともに、送電電極部２１から受電電極部２２への電力の供給開始および供給終了を制御する。これにより、設備１１の送電電極部２１と可動機器１２の受電電極部２２とが十分に重なり合っていることが検出されると、制御部２４は電力の供給を開始するとともに、オーバラップ量Ｍが小さくなると、制御部２４は電力の供給を終了する。したがって、設備１１側の送電電極部２１と可動機器１２の受電電極部２２との重なりに基づいて電力の供給をオンおよびオフすることができ、送電効率を向上することができるとともに、電力の反射などにともなう機器の損傷を低減することができる。 In the first embodiment described above, the detection unit 23 detects the overlap between the power transmission electrode unit 21 on the equipment 11 side and the power reception electrode unit 22 on the movable device 12 side as the overlap amount M. The control unit 24 switches the matching circuit of the matching device 33 based on the overlap amount M detected by the detecting unit 23, and controls the start and end of power supply from the power transmission electrode unit 21 to the power receiving electrode unit 22. .. As a result, when it is detected that the power transmission electrode unit 21 of the equipment 11 and the power reception electrode unit 22 of the movable device 12 are sufficiently overlapped with each other, the control unit 24 starts supplying electric power and the overlap amount M is increased. When it becomes smaller, the control unit 24 ends the power supply. Therefore, the power supply can be turned on and off based on the overlap between the power transmission electrode unit 21 on the equipment 11 side and the power reception electrode unit 22 of the movable device 12, the power transmission efficiency can be improved, and the power reflection can be performed. It is possible to reduce the damage to the equipment due to such factors.

また、第１実施形態では、可動機器１２の位置からオーバラップ量Ｍを検出する位置センサ５１を備えている。これにより、検出部２３は、給電ステーション１３に設けられている位置センサ５１で検出した可動機器１２の位置に基づいて、送電電極部２１と受電電極部２２とのオーバラップ量Ｍを検出する。したがって、位置センサ５１の設置という簡単な構造でオーバラップ量Ｍを検出することができる。 Further, in the first embodiment, the position sensor 51 that detects the overlap amount M from the position of the movable device 12 is provided. As a result, the detection unit 23 detects the overlap amount M between the power transmission electrode unit 21 and the power reception electrode unit 22 based on the position of the movable device 12 detected by the position sensor 51 provided in the power supply station 13. Therefore, the overlap amount M can be detected with a simple structure of installing the position sensor 51.

（第２実施形態）
第２実施形態による無線給電装置を図８に示す。
図８に示すように第２実施形態による無線給電装置１０は、容量検出部５２を備えている。容量検出部５２は、送電電極部２１と受電電極部２２との間に形成される電気的な容量を検出する。第１実施形態で説明したように、対向する送電電極部２１と受電電極部２２との間は空気が満たされている。そのため、送電電極部２１と受電電極部２２とは、電気的な容量であるコンデンサを形成する。この送電電極部２１と受電電極部２２との間の電気的な容量は、送電電極部２１と受電電極部２２との重なり量すなわちオーバラップ量Ｍに相関する。そこで、容量検出部５２は、これら送電電極部２１と受電電極部２２との間の電気的な容量を検出する。容量検出部５２は、検出した容量を電気信号として検出部２３へ出力する。検出部２３は、容量検出部５２で検出した電気的な容量に基づいて、送電電極部２１と受電電極部２２とのオーバラップ量Ｍを検出する。 (Second Embodiment)
The wireless power feeding device according to the second embodiment is shown in FIG.
As shown in FIG. 8, the wireless power feeding device 10 according to the second embodiment includes a capacity detecting unit 52. The capacity detection unit 52 detects the electrical capacity formed between the power transmission electrode unit 21 and the power reception electrode unit 22. As described in the first embodiment, air is filled between the power transmitting electrode unit 21 and the power receiving electrode unit 22 facing each other. Therefore, the power transmission electrode unit 21 and the power reception electrode unit 22 form a capacitor having an electrical capacity. The electrical capacity between the power transmission electrode unit 21 and the power reception electrode unit 22 correlates with the amount of overlap between the power transmission electrode unit 21 and the power reception electrode unit 22, that is, the overlap amount M. Therefore, the capacity detection unit 52 detects the electrical capacity between the power transmission electrode unit 21 and the power reception electrode unit 22. The capacity detection unit 52 outputs the detected capacity as an electric signal to the detection unit 23. The detection unit 23 detects the overlap amount M between the power transmission electrode unit 21 and the power reception electrode unit 22 based on the electrical capacity detected by the capacity detection unit 52.

制御部２４は、検出部２３で検出したオーバラップ量Ｍに基づいて、高周波生成部３２のオンおよびオフを実行する。これとともに、制御部２４は、検出部２３で検出したオーバラップ量Ｍに基づいて、給電ステーション１３において送電電極部２１から電力の供給を受ける可動機器１２の台数を検出し、この可動機器１２の台数に応じて整合器３３の整合回路部を切り替える。 The control unit 24 turns on and off the high frequency generation unit 32 based on the overlap amount M detected by the detection unit 23. At the same time, the control unit 24 detects the number of mobile devices 12 that receive power from the power transmission electrode unit 21 at the power supply station 13 based on the overlap amount M detected by the detection unit 23, and the control unit 24 detects the number of mobile devices 12 that receive power from the power transmission electrode unit 21. The matching circuit unit of the matching device 33 is switched according to the number of units.

第２実施形態では、送電電極部２１と受電電極部２２との間の電気的な容量を検出する容量検出部５２を有している。これにより、検出部２３は、容量検出部５２で検出した送電電極部２１と受電電極部２２との間の電気的な容量に基づいて、送電電極部２１と受電電極部２２とのオーバラップ量Ｍを検出する。したがって、電気的な容量の検出という簡単な構造かつ電気的な手法でオーバラップ量Ｍを検出することができる。 In the second embodiment, the capacity detection unit 52 that detects the electrical capacity between the power transmission electrode unit 21 and the power reception electrode unit 22 is provided. As a result, the detection unit 23 has an overlap amount between the power transmission electrode unit 21 and the power reception electrode unit 22 based on the electrical capacity between the power transmission electrode unit 21 and the power reception electrode unit 22 detected by the capacity detection unit 52. Detect M. Therefore, the overlap amount M can be detected by a simple structure and an electric method of detecting the electric capacity.

（第３実施形態）
第３実施形態による無線給電装置を図９に示す。
図９に示すように第３実施形態による無線給電装置１０は、反射検出部５３を備えている。反射検出部５３は、送電電極部２１と受電電極部２２との間の電気的な反射を反射電力として検出する。送電電極部２１から出力された電力は、その一部が受電電極部２２で受電されずに高周波生成部３２側へ反射する。すなわち、送電電極部２１から出力された電力の一部は、電気的な反射によって高周波生成部３２側へ戻される。この電気的な反射電力は、送電電極部２１と受電電極部２２との重なり量すなわちオーバラップ量Ｍに相関する。そこで、反射検出部５３は、電力の供給時に反射される電力を反射電力として検出する。反射検出部５３は、検出した反射電力を電気信号として検出部２３へ出力する。検出部２３は、反射検出部５３で検出した反射電力に基づいて、送電電極部２１と受電電極部２２とのオーバラップ量Ｍを検出する。 (Third Embodiment)
The wireless power feeding device according to the third embodiment is shown in FIG.
As shown in FIG. 9, the wireless power feeding device 10 according to the third embodiment includes a reflection detecting unit 53. The reflection detection unit 53 detects the electrical reflection between the power transmission electrode unit 21 and the power reception electrode unit 22 as reflected power. A part of the electric power output from the power transmission electrode unit 21 is reflected to the high frequency generation unit 32 side without being received by the power reception electrode unit 22. That is, a part of the electric power output from the power transmission electrode unit 21 is returned to the high frequency generation unit 32 side by electrical reflection. This electrically reflected power correlates with the amount of overlap, that is, the amount of overlap M between the power transmission electrode unit 21 and the power reception electrode unit 22. Therefore, the reflection detection unit 53 detects the power reflected when the power is supplied as the reflected power. The reflection detection unit 53 outputs the detected reflected power as an electric signal to the detection unit 23. The detection unit 23 detects the overlap amount M between the power transmission electrode unit 21 and the power reception electrode unit 22 based on the reflected power detected by the reflection detection unit 53.

制御部２４は、検出部２３で検出したオーバラップ量Ｍに基づいて、高周波生成部３２のオンおよびオフを実行する。これとともに、制御部２４は、検出部２３で検出したオーバラップ量Ｍに基づいて、給電ステーション１３において送電電極部２１から電力の供給を受ける可動機器１２の台数を検出し、この可動機器１２の台数に応じて整合器３３の整合回路部を切り替える。 The control unit 24 turns on and off the high frequency generation unit 32 based on the overlap amount M detected by the detection unit 23. At the same time, the control unit 24 detects the number of mobile devices 12 that receive power from the power transmission electrode unit 21 at the power supply station 13 based on the overlap amount M detected by the detection unit 23, and the control unit 24 detects the number of mobile devices 12 that receive power from the power transmission electrode unit 21. The matching circuit unit of the matching device 33 is switched according to the number of units.

第３実施形態では、送電電極部２１と受電電極部２２との間で生じる電気的な反射を反射電力として検出する反射検出部５３を有している。これにより、検出部２３は、反射検出部５３で検出した電気的な反射に基づいて、送電電極部２１と受電電極部２２とのオーバラップ量Ｍを検出する。したがって、電気的な反射の検出という簡単な構造かつ電気的な手法でオーバラップ量Ｍを検出することができる。 In the third embodiment, the reflection detection unit 53 detects the electrical reflection generated between the power transmission electrode unit 21 and the power reception electrode unit 22 as reflected power. As a result, the detection unit 23 detects the overlap amount M between the power transmission electrode unit 21 and the power reception electrode unit 22 based on the electrical reflection detected by the reflection detection unit 53. Therefore, the overlap amount M can be detected by a simple structure and an electrical method of detecting electrical reflection.

以上説明した本発明は、上記実施形態に限定されるものではなく、その要旨を逸脱しない範囲で種々の実施形態に適用可能である。
本開示は、実施例に準拠して記述されたが、本開示は当該実施例や構造に限定されるものではないと理解される。本開示は、様々な変形例や均等範囲内の変形をも包含する。加えて、様々な組み合わせや形態、さらには、それらに一要素のみ、それ以上、あるいはそれ以下、を含む他の組み合わせや形態をも、本開示の範疇や思想範囲に入るものである。
本開示に記載の制御部およびその手法は、コンピュータプログラムにより具体化された一つ乃至は複数の機能を実行するようにプログラムされたプロセッサおよびメモリを構成することによって提供された専用コンピュータにより、実現されてもよい。あるいは、本開示に記載の制御部およびその手法は、一つ以上の専用ハードウェア論理回路によってプロセッサを構成することによって提供された専用コンピュータにより、実現されてもよい。もしくは、本開示に記載の制御部およびその手法は、一つ乃至は複数の機能を実行するようにプログラムされたプロセッサおよびメモリと一つ以上のハードウェア論理回路によって構成されたプロセッサとの組み合わせにより構成された一つ以上の専用コンピュータにより、実現されてもよい。また、コンピュータプログラムは、コンピュータにより実行されるインストラクションとして、コンピュータ読み取り可能な非遷移有形記録媒体に記憶されていてもよい。 The present invention described above is not limited to the above-described embodiment, and can be applied to various embodiments without departing from the gist thereof.
Although the present disclosure has been described in accordance with the examples, it is understood that the present disclosure is not limited to the examples and structures. The present disclosure also includes various modifications and modifications within a uniform range. In addition, various combinations and forms, as well as other combinations and forms that include only one element, more, or less, are also within the scope of the present disclosure.
The controls and methods thereof described in the present disclosure are realized by a dedicated computer provided by configuring a processor and memory programmed to perform one or more functions embodied by a computer program. May be done. Alternatively, the controls and methods thereof described in the present disclosure may be implemented by a dedicated computer provided by configuring the processor with one or more dedicated hardware logic circuits. Alternatively, the controls and methods described herein are by a combination of a processor and memory programmed to perform one or more functions and a processor composed of one or more hardware logic circuits. It may be realized by one or more dedicated computers configured. Further, the computer program may be stored in a computer-readable non-transitional tangible recording medium as an instruction executed by the computer.

図面中、１０は無線給電装置、１１は設備、１２は可動機器、２１は送電電極部、２２は受電電極部、２３は検出部、２４は制御部、５１は位置センサ、５２は容量検出部、５３は反射検出部を示す。 In the drawing, 10 is a wireless power feeding device, 11 is equipment, 12 is a movable device, 21 is a power transmission electrode unit, 22 is a power receiving electrode unit, 23 is a detection unit, 24 is a control unit, 51 is a position sensor, and 52 is a capacity detection unit. , 53 indicate a reflection detection unit.

Claims (6)

固定側である設備（１１）に設けられ、電力を供給する送電電極部（２１）と、
前記設備（１１）に対して移動可能な可動機器（１２）と、
前記可動機器（１２）に設けられ、前記送電電極部（２１）と対向することにより、前記送電電極部（２１）から非接触で電力を受け取る受電電極部（２２）と、
前記送電電極部（２１）と前記受電電極部（２２）との重なりをオーバラップ量として検出する検出部（２３）と、
前記検出部（２３）で検出した前記オーバラップ量に基づいて、前記送電電極部（２１）からの電力の供給開始および供給終了を制御する制御部（２４）と、
を備える無線給電装置。 A power transmission electrode unit (21) provided in the equipment (11) on the fixed side and supplying electric power,
A movable device (12) that can be moved with respect to the equipment (11), and
A power receiving electrode unit (22) provided on the movable device (12) and receiving power from the power transmission electrode unit (21) in a non-contact manner by facing the power transmission electrode unit (21).
A detection unit (23) that detects the overlap between the power transmission electrode unit (21) and the power reception electrode unit (22) as an overlap amount, and
A control unit (24) that controls the start and end of power supply from the power transmission electrode unit (21) based on the overlap amount detected by the detection unit (23).
A wireless power supply device equipped with. 前記制御部（２４）は、前記検出部（２３）で検出した前記オーバラップ量が予め設定した開始設定値以上になると前記送電電極部（２１）からの電力の供給を開始する請求項１記載の無線給電装置。 The first aspect of claim 1, wherein the control unit (24) starts supplying electric power from the power transmission electrode unit (21) when the overlap amount detected by the detection unit (23) becomes equal to or more than a preset start set value. Wireless power supply device. 前記制御部（２４）は、前記検出部（２３）で検出した前記オーバラップ量が予め設定した終了設定値以下になると前記送電電極部（）からの電力の供給を終了する請求項１記載の無線給電装置。 The first aspect of claim 1, wherein the control unit (24) terminates the supply of electric power from the power transmission electrode unit () when the overlap amount detected by the detection unit (23) becomes equal to or less than a preset end set value. Wireless power supply device. 前記可動機器（１２）の位置を検出する位置センサ（５１）をさらに備え、
前記検出部（２３）は、前記位置センサ（５１）で検出した前記可動機器（１２）の位置から前記オーバラップ量を検出する請求項１から３のいずれか一項記載の無線給電装置。 A position sensor (51) for detecting the position of the movable device (12) is further provided.
The wireless power supply device according to any one of claims 1 to 3, wherein the detection unit (23) detects the overlap amount from the position of the movable device (12) detected by the position sensor (51). 前記送電電極部（２１）と前記受電電極部（２２）との間に形成される電気的な容量を検出する容量検出部（５２）をさらに備え、
前記検出部（２３）は、前記容量検出部（５２）で検出した前記容量から前記オーバラップ量を検出する請求項１から３のいずれか一項記載の無線給電装置。 A capacity detection unit (52) for detecting an electrical capacity formed between the power transmission electrode unit (21) and the power reception electrode unit (22) is further provided.
The wireless power feeding device according to any one of claims 1 to 3, wherein the detection unit (23) detects the overlap amount from the capacity detected by the capacity detection unit (52). 前記送電電極部（２１）から前記受電電極部（２２）へ電力を供給するとき、前記受電電極部（２２）から前記送電電極部（２１）へ反射する電力を反射電力として検出する反射検出部（５３）をさらに備え、
前記検出部（２３）は、前記反射検出部（５３）で検出した前記反射電力から前記オーバラップ量を検出する請求項１から３のいずれか一項記載の無線給電装置。 When power is supplied from the power transmission electrode unit (21) to the power reception electrode unit (22), the reflection detection unit detects the power reflected from the power reception electrode unit (22) to the power transmission electrode unit (21) as reflected power. Further equipped with (53)
The wireless power feeding device according to any one of claims 1 to 3, wherein the detection unit (23) detects the overlap amount from the reflected power detected by the reflection detection unit (53).
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03123814A (en) * 1989-10-09 1991-05-27 Tokin Corp Electrostatic capacity type displacement sensor
JP2016119756A (en) * 2014-12-19 2016-06-30 Tdk株式会社 Wireless power transmission system
WO2019117140A1 (en) * 2017-12-11 2019-06-20 パナソニックＩｐマネジメント株式会社 Wireless power transmission system, power transmitting device, and power receiving device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03123814A (en) * 1989-10-09 1991-05-27 Tokin Corp Electrostatic capacity type displacement sensor
JP2016119756A (en) * 2014-12-19 2016-06-30 Tdk株式会社 Wireless power transmission system
WO2019117140A1 (en) * 2017-12-11 2019-06-20 パナソニックＩｐマネジメント株式会社 Wireless power transmission system, power transmitting device, and power receiving device

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