JP2014176125A5 - Charging apparatus and power supply method - Google Patents
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Description
本発明は、被充電機器に内蔵されている二次電池に充電するための無接点式の充電装置及びその充電装置が実行する給電方法に関する。 The present invention relates to a contactless charging device for charging a secondary battery built in a device to be charged and a power feeding method executed by the charging device.
本発明は、上記従来例の問題を解決するためになされたものであり、被充電機器側に受電コイルを備えていれば、機種やメーカーなどに関係なく内蔵二次電池に充電したり、あるいは内部回路に給電したりすることができ、機器充電載置台に対する被充電機器の位置に関わらず効率よく給電が可能な無接点式の充電装置及びその充電装置が実行する給電方法を提供することを目的とする。 The present invention has been made to solve the above-described problems of the conventional example, and if a receiving coil is provided on the charged device side, the built-in secondary battery can be charged regardless of the model or manufacturer, or To provide a contactless charging device that can supply power to an internal circuit and can efficiently supply power regardless of the position of a device to be charged with respect to a device charging stage, and a power supply method executed by the charging device. Objective.
上記目的を達成するために本発明の一態様に係る充電装置は、複数の送電コイルと、前記複数の送電コイルの各々の駆動時における進行波電力と反射波電力との差である送電電力に基づいて、前記複数の送電コイルの中から、１又は複数の第１送電コイルの各々の前記送電電力の合計値が所定閾値以上となるように、前記１又は複数の第１送電コイルと、前記第１送電コイルから所定範囲に位置する１又は複数の第２送電コイルとを特定する制御部とを備え、前記制御部によって特定された第１送電コイルと第２送電コイルとを駆動させて、被充電機器に給電を行う。 In order to achieve the above object, a charging device according to an aspect of the present invention provides a plurality of power transmission coils and a transmission power that is a difference between a traveling wave power and a reflected wave power when each of the plurality of power transmission coils is driven. Based on the one or more first power transmission coils, the total value of the transmission power of each of the one or more first power transmission coils from the plurality of power transmission coils is equal to or greater than a predetermined threshold, A control unit that specifies one or a plurality of second power transmission coils located in a predetermined range from the first power transmission coil, driving the first power transmission coil and the second power transmission coil specified by the control unit , Supply power to the device to be charged.
前記制御部は、前記１又は複数の第１送電コイルと前記１又は複数の第２送電コイルとの、複数組みの組み合わせのうち、前記１又は複数の第１送電コイルと前記１又は複数の第２送電コイルから得られる前記送電電力の合計値が、最大となる組合せを特定することが好ましい。 The control unit includes the one or more first power transmission coils, the one or more first power transmission coils, and the one or more first power transmission coils, and the one or more second power transmission coils. It is preferable to specify a combination in which the total value of the transmission power obtained from two transmission coils is maximized .
前記制御部は、前記第１送電コイルが、複数の第１送電コイルであるときに、前記複数の第１送電コイルと前記第２送電コイルとの複数組の組み合わせの中から、前記送電電力の合計値が最大となる組合せを特定することが好ましい。 When the first power transmission coil is a plurality of first power transmission coils, the control unit is configured to control the transmission power from a plurality of combinations of the plurality of first power transmission coils and the second power transmission coil. It is preferable to specify a combination that maximizes the total value .
前記制御部は、前記１又は複数の第１送電コイルの各々の前記送電電力の合計値が最大となるように、前記１又は複数の第１送電コイルを特定することが好ましい。 It is preferable that the control unit specifies the one or more first power transmission coils such that a total value of the transmitted power of each of the one or more first power transmission coils is maximized.
前記制御部は、前記１又は複数の第１送電コイルを中心として、前記１又は複数の第１送電コイルから所定範囲に位置する１又は複数のコイルを、前記１又は複数の第２送電コイルとして特定することが好ましい。 The control unit uses one or more coils positioned within a predetermined range from the one or more first power transmission coils as the one or more second power transmission coils, with the one or more first power transmission coils as a center. It is preferable to specify .
前記制御部は、前記複数の送電コイルのうち、前記１又は複数の第１送電コイルに対して各方向の所定の範囲に位置する前記複数の送電コイルを順に駆動することにより得られる前記送電電力の増加量に基づいて、前記１又は複数の第２送電コイルを特定することが好ましい。 The transmission power obtained by sequentially driving the plurality of power transmission coils located in a predetermined range in each direction with respect to the one or the plurality of first power transmission coils among the plurality of power transmission coils. It is preferable to identify the one or the plurality of second power transmission coils based on the amount of increase .
また、本発明の他の一態様に係る給電方法は、複数の送電コイルの各々を駆動するステップと、前記複数の送電コイルの各々の駆動時における進行波電力と反射波電力との差である送電電力を取得するステップと、前記送電電力に基づいて、１又は複数の第１送電コイルを特定するステップと、前記複数の送電コイルのうち、前記１又は複数の第１送電コイルに対して所定範囲内に位置する送電コイルを、順に駆動するステップと、前記駆動時における、前記所定範囲内に位置する送電コイルの各々の前記送電電力を取得するステップと、前記１又は複数の第１送電コイルの前記送電電力と、１又は複数の第２送電コイルの前記送電電力との合計値が最大となるように、前記１又は複数の第２送電コイルを特定するステップと、前記１又は複数の第１送電コイルと前記１又は複数の第２送電コイルとを駆動させて被充電機器に給電を行うステップとを含む。 Further, a power feeding method according to another aspect of the present invention is a difference between a step of driving each of the plurality of power transmission coils and a traveling wave power and a reflected wave power at the time of driving each of the plurality of power transmission coils. A step of acquiring transmitted power, a step of identifying one or more first power transmission coils based on the transmitted power, and a predetermined one for the one or more first power transmission coils among the plurality of power transmission coils. A step of sequentially driving a power transmission coil located within a range, a step of acquiring the transmitted power of each of the power transmission coils located within the predetermined range during the driving, and the one or more first power transmission coils Identifying the one or more second power transmission coils such that the total value of the transmitted power and the power transmission power of one or more second power transmission coils is maximized; The first transmitting coil and is driven and the one or more second transmission coil and performing a feed to be charged equipment.
本発明に係る充電装置によれば、被充電機器を載置すると、充電装置側で最も効率よく被充電機器の内蔵二次電池に充電可能な１つの送電コイル又は２以上の送電コイルの組合せを特定することができる。その結果、被充電機器の内蔵二次電池を充電するのに要する消費電力量を少なくすることができる。また、被充電機器は受電コイルと二次電池を有していればよく、その他の特別な機能は必要としない。そのため、機種やメーカーを問わず、様々な被充電機器を充電することができる。あるいは、内蔵二次電池を備えていない電気機器に対しても、受電コイルを備えていれば、その内部回路に給電することが可能である。 According to the charging apparatus according to the present invention, when for placing an object to be charged device, a combination of the most efficient one can be charged to the internal rechargeable battery of the charging device transmitting coil or two or more power transmission coils in the charging device side Can be identified. As a result, the power consumption required to charge the built-in secondary battery of the device to be charged can be reduced. Moreover, the to-be-charged apparatus should just have a receiving coil and a secondary battery, and other special functions are not required. Therefore, it is possible to charge various charged devices regardless of the model or manufacturer. Alternatively, an electric device that does not include a built-in secondary battery can supply power to the internal circuit as long as it includes a power receiving coil.
図３は、無接点式充電装置１のハードウエア構成及びマイクロコンピュータの機能ブロックを示す。電源回路３１は、商用電源から入力された交流電力を降圧し、さらに整流して直流電力に変換する。高周波電源３０は、例えば半導体素子を用いたスイッチング回路などで構成され、所望する周波数の交流電力（高周波電力）を発生させる。高周波電源３０から送電コイル１３に至る回路では高周波電流が流れるので、インピーダンス整合をとる必要があり、送電コイル１３が接続される各電線１４，１５には、それぞれ上記スイッチ１６，１７及び整合回路１８，１９が接続されている。スイッチ１６，１７の構成は特に限定されず、例えばトランジスタなどの半導体素子を用いた無接点スイッチなどで構成することができる。また、整合回路１８，１９の構成は特に限定されず、トランス、コイル、コンデンサ、抵抗体、トランジスタなどを適宜組み合わせて構成することができる。各電線１４，１５には、それぞれ方向性結合器３２が接続されており、後述するように、１つの送電コイル又は２以上の送電コイルに高周波電力を供給して駆動する際に、電力に応じた信号を出力する。方向性結合器３２にはＡ／Ｄ変換器３３が接続されており、方向性結合器３２から出力される信号をディジタル信号に変換してマイクロコンピュータ３４に入力する。進行波電力と反射波電力の差が送電電力となる。マイクロコンピュータ３４（「制御部」）は、周知のようにＣＰＵ、ＲＯＭ及びＲＡＭ等で構成され、以下に説明する各機能を実行する。 FIG. 3 shows a hardware configuration of the contactless charging apparatus 1 and a functional block of the microcomputer. The power supply circuit 31 steps down AC power input from a commercial power supply, further rectifies it, and converts it into DC power. The high frequency power supply 30 is constituted by, for example, a switching circuit using a semiconductor element, and generates AC power (high frequency power) having a desired frequency. Since a high-frequency current flows in the circuit from the high-frequency power source 30 to the power transmission coil 13, impedance matching needs to be taken. The wires 16, 15 to which the power transmission coil 13 is connected are connected to the switches 16, 17 and the matching circuit 18, respectively. , 19 are connected. The configuration of the switches 16 and 17 is not particularly limited. For example, the switches 16 and 17 can be configured by contactless switches using semiconductor elements such as transistors. The configurations of the matching circuits 18 and 19 are not particularly limited, and can be configured by appropriately combining a transformer, a coil, a capacitor, a resistor, a transistor, and the like. A directional coupler 32 is connected to each of the electric wires 14 and 15, and, as will be described later, when supplying high frequency power to one power transmission coil or two or more power transmission coils to drive, depending on the power. Output the signal. An A / D converter 33 is connected to the directional coupler 32, and a signal output from the directional coupler 32 is converted into a digital signal and input to the microcomputer 34. The difference between traveling wave power and reflected wave power is transmitted power. As is well known, the microcomputer 34 (“control unit”) includes a CPU, a ROM, a RAM, and the like, and executes each function described below.
Claims (7)
前記複数の送電コイルの各々の駆動時における進行波電力と反射波電力との差である送電電力に基づいて、前記複数の送電コイルの中から、１又は複数の第１送電コイルの各々の前記送電電力の合計値が所定閾値以上となるように、前記１又は複数の第１送電コイルと、前記第１送電コイルから所定範囲に位置する１又は複数の第２送電コイルとを特定する制御部とを備え、
前記制御部によって特定された第１送電コイルと第２送電コイルとを駆動させて、被充電機器に給電を行う充電装置。 A plurality of power transmission coils;
Based on the transmission power that is the difference between the traveling wave power and the reflected wave power at the time of driving each of the plurality of power transmission coils, the one of the one or more first power transmission coils is selected from the plurality of power transmission coils. A control unit that identifies the one or more first power transmission coils and one or more second power transmission coils located in a predetermined range from the first power transmission coil such that the total value of the transmitted power is equal to or greater than a predetermined threshold. And
A charging device that drives the first power transmission coil and the second power transmission coil specified by the control unit to supply power to the device to be charged.
前記１又は複数の第１送電コイルと前記１又は複数の第２送電コイルとの、複数組みの組み合わせのうち、前記１又は複数の第１送電コイルと前記１又は複数の第２送電コイルから得られる前記送電電力の合計値が、最大となる組合せを特定する請求項１に記載の充電装置。 The controller is
Of the plurality of combinations of the one or more first power transmission coils and the one or more second power transmission coils, obtained from the one or more first power transmission coils and the one or more second power transmission coils. The charging device according to claim 1, wherein a combination with which a total value of the transmitted power is maximized is specified .
前記第１送電コイルが、複数の第１送電コイルであるときに、
前記複数の第１送電コイルと前記第２送電コイルとの複数組の組み合わせの中から、前記送電電力の合計値が最大となる組合せを特定する請求項２に記載の充電装置。 The controller is
When the first power transmission coil is a plurality of first power transmission coils,
The charging device according to claim 2, wherein a combination that maximizes a total value of the transmitted power is specified from a plurality of combinations of the plurality of first power transmission coils and the second power transmission coil .
前記１又は複数の第１送電コイルの各々の前記送電電力の合計値が最大となるように、
前記１又は複数の第１送電コイルを特定する請求項１乃至請求項３の少なくともいずれか一項に記載の充電装置。 The controller is
The total value of the transmitted power of each of the one or more first power transmission coils is maximized ,
The charging device according to at least one of claims 1 to 3, wherein the one or more first power transmission coils are specified.
前記１又は複数の第１送電コイルを中心として、前記１又は複数の第１送電コイルから所定範囲に位置する１又は複数のコイルを、前記１又は複数の第２送電コイルとして特定する請求項１乃至請求項４の少なくともいずれか一項に記載の充電装置。 The controller is
The one or more coils located in a predetermined range from the one or more first power transmission coils with the one or more first power transmission coils as a center are specified as the one or more second power transmission coils. The charging device according to at least one of claims 4 to 4.
前記複数の送電コイルのうち、前記１又は複数の第１送電コイルに対して各方向の所定の範囲に位置する前記複数の送電コイルを順に駆動することにより得られる前記送電電力の増加量に基づいて、前記１又は複数の第２送電コイルを特定する請求項１乃至請求項５の少なくともいずれか一項に記載の充電装置。 The controller is
Based on the increase amount of the transmission power obtained by sequentially driving the plurality of power transmission coils located in a predetermined range in each direction with respect to the one or the plurality of first power transmission coils among the plurality of power transmission coils. Te, the charging device according to at least any one of claims 1 to 5 for identifying the one or more second transmission coil.
前記複数の送電コイルの各々の駆動時における進行波電力と反射波電力との差である送電電力を取得するステップと、
前記送電電力に基づいて、１又は複数の第１送電コイルを特定するステップと、
前記複数の送電コイルのうち、前記１又は複数の第１送電コイルに対して所定範囲内に位置する送電コイルを、順に駆動するステップと、
前記駆動時における、前記所定範囲内に位置する送電コイルの各々の前記送電電力を取得するステップと、
前記１又は複数の第１送電コイルの前記送電電力と、１又は複数の第２送電コイルの前記送電電力との合計値が最大となるように、前記１又は複数の第２送電コイルを特定するステップと、
前記１又は複数の第１送電コイルと前記１又は複数の第２送電コイルとを駆動させて被充電機器に給電を行うステップと
を含む給電方法。 Driving each of the plurality of power transmission coils;
Obtaining transmission power that is the difference between traveling wave power and reflected wave power at the time of driving each of the plurality of power transmission coils;
Identifying one or more first power transmission coils based on the transmitted power;
Among the plurality of power transmission coils, sequentially driving power transmission coils located within a predetermined range with respect to the one or plurality of first power transmission coils;
Obtaining the transmitted power of each of the power transmission coils located within the predetermined range during the driving;
The one or more second power transmission coils are specified such that the total value of the power transmission power of the one or more first power transmission coils and the power transmission power of the one or more second power transmission coils is maximized. Steps,
Feeding the charged device by driving the one or more first power transmission coils and the one or more second power transmission coils;
Including a power supply method .
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| US9390850B2 (en) | 2012-07-13 | 2016-07-12 | Semiconductor Energy Laboratory Co., Ltd. | Power transmitting device, power feeding system, and power feeding method |
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| US11863001B2 (en) | 2015-12-24 | 2024-01-02 | Energous Corporation | Near-field antenna for wireless power transmission with antenna elements that follow meandering patterns |
| CN108702018B (en) * | 2015-12-24 | 2022-01-18 | 艾诺格思公司 | System and method for wireless charging by multiple receiving devices |
| US10079515B2 (en) | 2016-12-12 | 2018-09-18 | Energous Corporation | Near-field RF charging pad with multi-band antenna element with adaptive loading to efficiently charge an electronic device at any position on the pad |
| JP6530335B2 (en) * | 2016-03-14 | 2019-06-12 | 株式会社東芝 | Wireless power transmission apparatus, wireless power transmission method, program, wireless power transmission system |
| DE102016221225A1 (en) * | 2016-10-27 | 2018-05-03 | Robert Bosch Gmbh | Energy transmission device and energy transmission method |
| US11011942B2 (en) | 2017-03-30 | 2021-05-18 | Energous Corporation | Flat antennas having two or more resonant frequencies for use in wireless power transmission systems |
| US11462949B2 (en) | 2017-05-16 | 2022-10-04 | Wireless electrical Grid LAN, WiGL Inc | Wireless charging method and system |
| US12074460B2 (en) | 2017-05-16 | 2024-08-27 | Wireless Electrical Grid Lan, Wigl Inc. | Rechargeable wireless power bank and method of using |
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