JP2021164392A - Non-contact power supply device - Google Patents
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本発明は、非接触給電装置に関し、特に非接触送電装置の送電電力制御技術に関する。 The present invention relates to a contactless power supply device, and more particularly to a transmission power control technique for the contactless power transmission device.
近年、各種電気機器の充電、電気自動車への給電等の幅広い分野において、非接触で電力を伝送する非接触給電技術が用いられるようになってきている。非接触給電装置では、送受コイル間の相対位置の変動に伴う結合係数の変動により出力電圧が変化し、出力電圧が規定値から外れるおそれがある。例えば送受コイルが近づきすぎた場合は、受電側出力電圧が必要以上に上昇し、それに伴い出力電流も増加するが、例えば特許文献１には、受電側電圧が上昇した場合は、受電側から通信で送電側に制御信号を送り、送電側の出力を調整することにより、受電側の出力電流の増加を抑制する技術が開示されており、また例特許文献２には、受電側の出力電流が想定より大きくなった場合は放電回路を通して放電することにより、通信することなく出力電流の増加を抑制する技術が開示されている。 In recent years, non-contact power supply technology for transmitting electric power in a non-contact manner has come to be used in a wide range of fields such as charging of various electric devices and power supply to electric vehicles. In the non-contact power feeding device, the output voltage may change due to the fluctuation of the coupling coefficient due to the fluctuation of the relative position between the transmission / reception coils, and the output voltage may deviate from the specified value. For example, if the transmission / reception coil gets too close, the output voltage on the power receiving side rises more than necessary, and the output current also increases accordingly. Discloses a technique for suppressing an increase in the output current on the power receiving side by sending a control signal to the power transmitting side and adjusting the output on the power transmitting side. A technique for suppressing an increase in output current without communication by discharging through a discharge circuit when the value becomes larger than expected is disclosed.
前述のように結合係数が変動した時、受電側の出力電圧が変動することになる。その変動を二次側のＤＣ−ＤＣコンバータのスイッチングを変更することによって変動を吸収する制御が特許文献１に記載されているが、特許文献１に記載の制御では以下のような問題点がある。 When the coupling coefficient fluctuates as described above, the output voltage on the power receiving side fluctuates.
第１に、送電側と受電側の通信が途絶した場合に、送電電力が高いまま動作することになり、電池および車載側充電回路が過熱するという問題がある。 First, when the communication between the power transmission side and the power reception side is interrupted, the power transmission power remains high and the battery and the on-vehicle side charging circuit are overheated.
第２に、結合係数の変動速度が高くなり、送電側制御回路と受電側制御回路の通信速度を上回った場合に、一次側の制御のみでは充電電力変動を抑制しきれないという問題がある。 Secondly, when the fluctuation speed of the coupling coefficient becomes high and exceeds the communication speed of the power transmission side control circuit and the power reception side control circuit, there is a problem that the charge power fluctuation cannot be suppressed only by the control on the primary side.
また、特許文献２の技術では、送電側と受電側の通信が途絶した場合に、前記加熱の問題は回避できるが、余分な電流を放電回路で熱に変換するので、電力の無駄が生じるという問題がある。 Further, in the technique of
本発明は前述の問題点を鑑みてなされたものであり、送受コイル間の結合係数が変動しても、無線通信することなく、受電側の出力電圧あるいは出力電流を制御することができる非接触給電装置を提供することを目的とする。 The present invention has been made in view of the above-mentioned problems, and even if the coupling coefficient between the transmission and reception coils fluctuates, the output voltage or output current on the power receiving side can be controlled without wireless communication. It is an object of the present invention to provide a power feeding device.
本発明は前述の目的を達成するために以下の技術的手段を採用する。 The present invention employs the following technical means to achieve the above-mentioned object.
本発明に係る非接触給電装置の第１の構成は、送電側コイルと、前記送電側コイルに交流電力を給電する送電側コイル駆動手段と、前記送電側コイル駆動手段に通電するパルス波形を生成する交流波形生成器と、前記交流波形生成器の前記パルス波形に基づいて送電電力を制御する送電電力制御手段とを備え、前記送電側コイルから、外部の受電側装置に備えられた受電側コイルに対して電力を非接触で給電する非接触給電装置において用いられる送電側コイルで消費される電力を検出する手段を有している非接触給電装置であって、
前記非接触給電装置は、前記送電側コイル駆動手段から前記送電側コイルに通電される電圧波形に相似な波形である送電側コイル駆動電圧検出波形を生成する送電側コイル駆動電圧波形検出手段と、前記送電側コイルに通電される電流の波形に相似な波形である送電側コイル電流検出波形を生成する送電側コイル電流波形検出手段と、
前記送電側コイル駆動電圧検出波形と前記送電側コイル電流検出波形とを乗算する乗算器と、前記乗算器出力から直流に近い低い周波数の成分のみを取り出す低域通過フィルタにより、送電側コイルで消費される電力を検出する手段と、
前記送電電力制御手段において前記送電側コイルで消費される電力を制御するための波形を変化させる手段と、を備え、
前記送電側コイルでの消費電力が一定になるように制御できることを特徴とする。The first configuration of the non-contact power feeding device according to the present invention generates a power transmission side coil, a power transmission side coil driving means for supplying AC power to the power transmission side coil, and a pulse waveform for energizing the power transmission side coil driving means. A power transmission power control means for controlling power transmission based on the pulse waveform of the AC waveform generator, and a power reception side coil provided in an external power reception side device from the power transmission side coil. It is a non-contact power feeding device having a means for detecting the power consumed by the power transmission side coil used in the non-contact power feeding device that supplies power to the power in a non-contact manner.
The non-contact power feeding device includes a power transmission side coil drive voltage waveform detecting means that generates a power transmission side coil drive voltage detection waveform that is a waveform similar to a voltage waveform that is energized from the power transmission side coil drive means to the power transmission side coil. A power transmission side coil current waveform detecting means for generating a power transmission side coil current detection waveform which is a waveform similar to the waveform of the current energized in the power transmission side coil, and
Consumed by the power transmission side coil by a multiplier that multiplies the power transmission side coil drive voltage detection waveform and the power transmission side coil current detection waveform, and a low frequency pass filter that extracts only low frequency components close to direct current from the multiplier output. Means to detect the power to be generated,
The power transmission power control means includes means for changing the waveform for controlling the power consumed by the power transmission side coil.
It is characterized in that the power consumption of the power transmission side coil can be controlled to be constant.
この構成によれば、送電側コイルに印加される送電側コイル駆動電圧検出波形と送電コイルに流れる送電側コイル電流検出波形を検出した結果に基づいて、送電コイルで消費される電力を導出して、この電力が設定値になるように制御することが可能となる。 According to this configuration, the power consumed by the power transmission coil is derived based on the result of detecting the power transmission side coil drive voltage detection waveform applied to the power transmission side coil and the power transmission side coil current detection waveform flowing through the power transmission coil. , It is possible to control this power to reach the set value.
送電側コイルで消費される電力は、送電側コイルの抵抗による発熱と受電側に送られる電力の和であるが、前記発熱は通常十分に小さくなるように設計されるので、前記送電側コイルで消費される電力はほぼ受電側装置で受ける電力に等しいため、本発明の制御により受電電力制御が可能となる。 The power consumed by the power transmission side coil is the sum of the heat generated by the resistance of the power transmission side coil and the power sent to the power reception side. Since the power consumed is substantially equal to the power received by the power receiving side device, the power received can be controlled by the control of the present invention.
本発明に係る非接触給電装置の第２の構成は、前記送電電力制御手段として、前記交流波形生成器の出力パルスのデューティを制御することにより送電電力を制御することを特徴とする。 The second configuration of the non-contact power feeding device according to the present invention is characterized in that the transmitted power is controlled by controlling the duty of the output pulse of the AC waveform generator as the transmitted power controlling means.
この構成によれば、送電側コイルを駆動する送電側コイル駆動手段の出力パルス幅を制御することにより、送電側電力を制御することが可能となる。 According to this configuration, it is possible to control the power transmission side power by controlling the output pulse width of the power transmission side coil driving means for driving the power transmission side coil.
本発明に係る非接触給電装置の第３の構成は、前記送電電力制御手段として、前記送電側コイル駆動回路の供給電圧を制御することにより送電電力を制御することを特徴とする。 A third configuration of the non-contact power feeding device according to the present invention is characterized in that, as the power transmission power control means, the power transmission power is controlled by controlling the supply voltage of the coil drive circuit on the power transmission side.
この構成によれば、送電側コイルを駆動する送電側コイル駆動手段の電源電圧を制御することにより、送電側電力を制御することが可能となる。 According to this configuration, it is possible to control the power transmission side power by controlling the power supply voltage of the power transmission side coil driving means for driving the power transmission side coil.
本発明に係る非接触給電装置の第４の構成は、前記送電電力制御手段として、前記交流波形生成器の出力にスイッチやゲート回路を挿入し、前記交流波形生成器のパルス出力を送電側コイル駆動回路に通したり、遮断することにより送電電力を制御することを特徴とする。 The fourth configuration of the non-contact power feeding device according to the present invention is to insert a switch or a gate circuit into the output of the AC waveform generator as the power transmission power control means, and to transmit the pulse output of the AC waveform generator to the power transmission side coil. It is characterized in that the transmitted power is controlled by passing it through or shutting off the drive circuit.
この構成によれば、送電側コイルを駆動する送電側コイル駆動手段の入力の駆動信号を通過させたり、あるいは遮断したりすることにより、送電側電力を制御することが可能となる。 According to this configuration, it is possible to control the power transmission side power by passing or blocking the input drive signal of the power transmission side coil driving means for driving the power transmission side coil.
本発明に係る非接触給電装置の第５の構成は、前記送電電力制御手段として、前記交流波形生成器の出力パルスの周波数を制御することにより送電電力を制御することを特徴とする。 A fifth configuration of the non-contact power feeding device according to the present invention is characterized in that the transmitted power is controlled by controlling the frequency of the output pulse of the AC waveform generator as the transmitted power controlling means.
この構成によれば、受電側の共振回路が周波数特性を有しているので、送電側コイルを駆動する給電回路の駆動周波数を制御することにより、送電側電力を制御することが可能となる。 According to this configuration, since the resonance circuit on the power receiving side has a frequency characteristic, it is possible to control the power on the power transmission side by controlling the drive frequency of the power supply circuit that drives the coil on the power transmission side.
本発明によれば、受電側に供給される電力が制限値を超過する事態を、通信という手段を使用せずに、抑制することができる。また、受電側が２次電池の充電の場合は、電池電圧がほぼ一定なので、ほぼ一定電流での充電が可能となる。 According to the present invention, it is possible to suppress a situation in which the power supplied to the power receiving side exceeds the limit value without using a means of communication. Further, when the power receiving side is charging the secondary battery, the battery voltage is substantially constant, so that charging with a substantially constant current is possible.
以下、本発明を実施するための形態について、図面を参照しながら説明する。尚，以下の実施の形態は，本発明を具体化した一例であって，本発明の技術的範囲を限定する性格のものではない。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The following embodiments are examples that embody the present invention, and do not limit the technical scope of the present invention.
図１は、本発明の基本となる実施形態である。送電側コイル６の駆動電圧波形と通過電流を検出し、乗算後低域通過フィルタを通すことにより送電側コイルで消費される電力を導出して、送電電力制御手段に加えることにより、送電側コイルでの消費電力を制御できる。送電側コイルで消費される電力は、送電コイルの抵抗による発熱と受電側に送られる電力の和であるが、前記発熱は通常十分に小さくなるように設計されるので、前記電力はほぼ受電側装置で受ける電力にほぼ等しいため、前記送電電力制御により受電側電力制御が可能となる。 FIG. 1 is a basic embodiment of the present invention. By detecting the drive voltage waveform and passing current of the power
１…送電側装置
２…受電側装置
３…交流波形生成器
４…送電電力制御手段
５…送電側コイル駆動手段
６…送電側コイル
７…送電側コイル駆動電圧波形検出手段
８…送電側コイル電流波形検出手段
９…乗算器
１０…低域通過フィルタ
１１…受電側コイル
１２…共振コンデンサ
１３…ダイオードブリッジ
１４…平滑コンデンサ
１５…２次電池
１６…電圧制御発振器1 ...
Claims (5)
前記非接触給電装置は、前記送電側コイル駆動手段から前記送電側コイルに通電される電圧波形に相似な波形である送電側コイル駆動電圧検出波形を生成する送電側コイル駆動電圧波形検出手段と、前記送電側コイルに通電される電流の波形に相似な波形である送電側コイル電流検出波形を生成する送電側コイル電流波形検出手段と、
前記送電側コイル駆動電圧検出波形と前記送電側コイル電流検出波形とを乗算する乗算器と、前記乗算器出力から直流に近い低い周波数の成分のみを取り出す低域通過フィルタにより、送電側コイルで消費される電力を検出する手段と、
前記送電電力制御手段において前記送電側コイルで消費される電力を制御するための波形を変化させる手段と、を備え、
前記送電側コイルでの消費電力が一定になるように制御できることを特徴とする、非接触給電装置。A power transmission side coil, a power transmission side coil driving means for supplying AC power to the power transmission side coil, an AC waveform generator for generating a pulse waveform for energizing the power transmission side coil drive means, and the pulse of the AC waveform generator. In a non-contact power supply device provided with a power transmission power control means for controlling power transmission based on a waveform, power is non-contactly supplied from the power transmission side coil to a power reception side coil provided in an external power reception side device. A non-contact power supply device having a means for detecting the power consumed by the power transmission side coil used.
The non-contact power feeding device includes a power transmission side coil drive voltage waveform detecting means that generates a power transmission side coil drive voltage detection waveform that is a waveform similar to a voltage waveform that is energized from the power transmission side coil drive means to the power transmission side coil. A power transmission side coil current waveform detecting means for generating a power transmission side coil current detection waveform which is a waveform similar to the waveform of the current energized in the power transmission side coil, and
Consumed by the power transmission side coil by a multiplier that multiplies the power transmission side coil drive voltage detection waveform and the power transmission side coil current detection waveform, and a low frequency pass filter that extracts only low frequency components close to direct current from the multiplier output. Means to detect the power to be generated,
The power transmission power control means includes means for changing the waveform for controlling the power consumed by the power transmission side coil.
A non-contact power feeding device characterized in that the power consumption of the power transmission side coil can be controlled to be constant.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2021176578A (en) * | 2020-05-29 | 2021-11-11 | 株式会社三洋物産 | Game machine |
| JP2022136178A (en) * | 2021-03-03 | 2022-09-15 | 株式会社三洋物産 | game machine |
| JP2022141901A (en) * | 2021-02-22 | 2022-09-29 | 株式会社三洋物産 | game machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021176578A (en) * | 2020-05-29 | 2021-11-11 | 株式会社三洋物産 | Game machine |
| JP2022141901A (en) * | 2021-02-22 | 2022-09-29 | 株式会社三洋物産 | game machine |
| JP2022136178A (en) * | 2021-03-03 | 2022-09-15 | 株式会社三洋物産 | game machine |
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