JP3518197B2 - Secondary side power receiving circuit of non-contact power supply equipment - Google Patents
Secondary side power receiving circuit of non-contact power supply equipmentInfo
- Publication number
- JP3518197B2 JP3518197B2 JP25405096A JP25405096A JP3518197B2 JP 3518197 B2 JP3518197 B2 JP 3518197B2 JP 25405096 A JP25405096 A JP 25405096A JP 25405096 A JP25405096 A JP 25405096A JP 3518197 B2 JP3518197 B2 JP 3518197B2
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- Japan
- Prior art keywords
- reference voltage
- load
- circuit
- power receiving
- secondary side
- Prior art date
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- Rectifiers (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、無接触給電設備の
２次側受電回路に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a secondary side power receiving circuit of a contactless power feeding facility.
【０００２】[0002]
【従来の技術】従来の無接触給電設備の２次側受電回路
の一例を図３により説明する。２次側受電回路は、高周
波電流を流す１次側誘導線路１に対向してコイル２を設
け、このコイル２に、コイルとともに誘導線路１の周波
数に共振する共振回路を形成するコンデンサ３を接続
し、このコンデンサ３に整流回路４を接続し、さらに整
流回路４に、出力電圧ＶOUT を基準電圧ＶE に制御する
定電圧制御回路５を接続して構成されている。負荷６は
定電圧制御回路５に接続され、この定電圧制御回路５よ
り負荷６へ給電される。2. Description of the Related Art An example of a conventional secondary side power receiving circuit of a contactless power feeding facility will be described with reference to FIG. The secondary-side power receiving circuit is provided with a coil 2 facing the primary-side induction line 1 for flowing a high-frequency current, and a capacitor 3 forming a resonance circuit that resonates at the frequency of the induction line 1 together with the coil 2 is connected to the coil 2. A rectifier circuit 4 is connected to the capacitor 3, and a constant voltage control circuit 5 for controlling the output voltage V OUT to the reference voltage V E is connected to the rectifier circuit 4. The load 6 is connected to the constant voltage control circuit 5, and the constant voltage control circuit 5 supplies power to the load 6.
【０００３】上記定電圧制御回路５は、電流制限用のコ
イル７と、上記基準電圧ＶE を発生する電圧発生器８
と、出力電圧ＶOUT と電圧発生器８の基準電圧ＶE とを
比較するコンパレータ９と、出力電圧ＶOUT が基準電圧
ＶE を越えた場合にコンパレータ９によりオンされる出
力調整用トランジスタ10と、フィルタを形成するダイオ
ード11およびコンデンサ12から構成されている。基準電
圧ＶE は、全負荷６に給電しているときを想定した高電
圧に設定されている。負荷６の電力は、使用電圧
ＶOUT 、すなわち基準電圧ＶE を大きくとると、大きく
なる。The constant voltage control circuit 5 includes a current limiting coil 7 and a voltage generator 8 for generating the reference voltage V E.
And a comparator 9 for comparing the output voltage V OUT with the reference voltage V E of the voltage generator 8, and an output adjusting transistor 10 which is turned on by the comparator 9 when the output voltage V OUT exceeds the reference voltage V E. , A diode 11 and a capacitor 12 which form a filter. The reference voltage V E is set to a high voltage that is assumed when power is being supplied to the full load 6. The power of the load 6 increases as the working voltage V OUT , that is, the reference voltage V E , increases.
【０００４】この定電圧制御回路５の構成により、負荷
６が減少すると、出力電圧ＶOUT が上昇し、出力電圧Ｖ
OUT が基準電圧ＶE を越えると、コンパレータ９により
トランジスタ10がオンされ、出力電圧ＶOUT が下げられ
て、出力電圧ＶOUT が基準電圧ＶE に維持される。With the configuration of the constant voltage control circuit 5, when the load 6 decreases, the output voltage V OUT increases and the output voltage V OUT increases.
When OUT exceeds the reference voltage V E , the transistor 9 is turned on by the comparator 9, the output voltage V OUT is lowered, and the output voltage V OUT is maintained at the reference voltage V E.
【０００５】[0005]
【発明が解決しようとする課題】しかし、このような従
来の無接触給電設備の２次側受電回路では、トランジス
タ10がオンされた際に、コンデンサ３に蓄えられている
電荷が過電流としてトランジスタ10に流れ、このトラン
ジスタ10のスイッチング損失により熱損失が多く発生す
るという問題があった。コンデンサ３の電荷は、トラン
ジスタ10がオフのときに蓄えられることから、基準電圧
ＶE が高いと、コンデンサ３に蓄えられる電荷は多くな
る。However, in such a secondary side power receiving circuit of the conventional contactless power feeding equipment, when the transistor 10 is turned on, the electric charge accumulated in the capacitor 3 becomes an overcurrent and the transistor is turned on. There is a problem that a large amount of heat loss occurs due to the switching loss of the transistor 10. Since the charge of the capacitor 3 is stored when the transistor 10 is off, the charge stored in the capacitor 3 increases when the reference voltage V E is high.
【０００６】また高周波電流を流す誘導線路１から給電
される２次側受電回路の数は、負荷６に印加される電圧
ＶOUT の２乗に反比例するため、基準電圧ＶE を高電圧
に設定すると、給電する２次側受電回路の数を少なくせ
ざるを得ないという問題があった。Since the number of secondary side power receiving circuits fed from the induction line 1 through which a high-frequency current flows is inversely proportional to the square of the voltage V OUT applied to the load 6, the reference voltage V E is set to a high voltage. Then, there is a problem that the number of secondary side power receiving circuits for supplying power must be reduced.
【０００７】そこで本発明は、熱損失を減少でき、誘導
線路から多数の２次側受電回路の受電を可能とする無接
触給電設備の２次側受電回路を提供することを目的とし
たものである。Therefore, the present invention has an object to provide a secondary side power receiving circuit of a contactless power feeding facility which can reduce heat loss and can receive a large number of secondary side power receiving circuits from an induction line. is there.
【０００８】[0008]
【課題を解決するための手段】前述した目的を達成する
ために、本第１発明の無接触給電設備の２次側受電回路
は、高周波電流を流す１次側誘導線路に対向してコイル
を設け、このコイルに、コイルとともに誘導線路の周波
数に共振する共振回路を形成するコンデンサを接続し、
このコンデンサに整流回路を接続し、この整流回路に、
出力電圧を基準電圧に制御する定電圧制御回路を接続
し、この定電圧制御回路より負荷に給電する無接触給電
設備の２次側受電回路であって、前記定電圧制御回路の
基準電圧を、負荷電力量に比例して段階的に設定する設
定手段を設けたことを特徴とするものである。In order to achieve the above-mentioned object, the secondary side power receiving circuit of the contactless power feeding equipment of the first aspect of the present invention has a coil facing a primary side induction line through which a high frequency current flows. Provided with this coil, a capacitor forming a resonance circuit that resonates at the frequency of the induction line together with the coil is connected,
Connect a rectifier circuit to this capacitor,
A secondary side power receiving circuit of a contactless power feeding facility, wherein a constant voltage control circuit for controlling an output voltage to a reference voltage is connected, and the constant voltage control circuit feeds a load to a load, wherein the reference voltage of the constant voltage control circuit is: It is characterized in that a setting means for setting stepwise in proportion to the amount of load electric power is provided.
【０００９】上記コンデンサに蓄えられる電荷が、定電
圧制御回路が動作したときに定電圧制御回路に流入して
損失となる。このコンデンサに蓄えられる電荷は基準電
圧に依存することから、定電圧制御回路が動作したとき
に発生する損失は基準電圧に依存する。The electric charge stored in the capacitor flows into the constant voltage control circuit when the constant voltage control circuit operates, resulting in a loss. Since the charge stored in this capacitor depends on the reference voltage, the loss that occurs when the constant voltage control circuit operates depends on the reference voltage.
【００１０】上記構成により、負荷電力量に応じて、基
準電圧を設定することにより、損失を減少させることが
可能となる。本第２発明の無接触給電設備の２次側受電
回路は、本第１発明の無接触給電設備の２次側受電回路
であって、設定手段は、負荷電力量を負荷の使用状態で
判断し、基準電圧を２段階に設定することを特徴とする
ものである。With the above arrangement, it is possible to reduce the loss by setting the reference voltage according to the amount of load power. The secondary side power receiving circuit of the contactless power feeding facility of the second aspect of the present invention is the secondary side power receiving circuit of the contactless power feeding facility of the first aspect of the present invention, wherein the setting means determines the load power amount based on the load usage state. However, the reference voltage is set in two steps.
【００１１】上記構成により、負荷の使用状態に応じて
基準電圧が２段階に設定される。With the above configuration, the reference voltage is set in two stages according to the usage state of the load.
【００１２】[0012]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。なお、従来例の図３の構成と同一
の構成には同一の符号を付して説明を省略する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. It should be noted that the same components as those of the conventional example shown in FIG.
【００１３】図１は本発明の実施の形態における無接触
給電設備の２次側受電回路の回路構成図である。本発明
の定電圧制御回路５’は、従来の電圧発生器８に代え
て、バッテリ21と、このバッテリ21に接続された可変抵
抗器からなる２つの基準電圧電圧発生器22，23と、この
２つの基準電圧電圧発生器22，23により発生される基準
電圧ＶE1，ＶE2（ＶE1＞ＶE2）の一方を選択するリレイ
24およびその接点25を設け、出力電圧ＶOUT とリレイ24
（接点25）により選択された基準電圧ＶE がコンパレー
タ９により比較される。出力電圧ＶOUT が基準電圧ＶE
を越えた場合にコンパレータ９が動作し、トランジスタ
10がオンされ、短絡される。たとえば、基準電圧ＶE1と
してＤＣ３００Ｖ，基準電圧ＶE2としてＤＣ１００Ｖが
発生される。なお、基準電圧ＶE1が従来例の電圧発生器
８が発生する基準電圧に相当する。FIG. 1 is a circuit configuration diagram of a secondary side power receiving circuit of a contactless power feeding facility according to an embodiment of the present invention. The constant voltage control circuit 5'of the present invention replaces the conventional voltage generator 8 with a battery 21, two reference voltage voltage generators 22 and 23 composed of variable resistors connected to the battery 21, and A relay for selecting one of the reference voltages V E1 and V E2 (V E1 > V E2 ) generated by the two reference voltage generators 22 and 23.
24 and its contact 25 are provided to output voltage V OUT and relay 24
The reference voltage V E selected by the (contact 25) is compared by the comparator 9. The output voltage V OUT is the reference voltage V E
When it exceeds the threshold, the comparator 9 operates and the transistor
10 is turned on and short circuited. For example, 300 V DC is generated as the reference voltage V E1 and 100 V DC is generated as the reference voltage V E2 . The reference voltage V E1 corresponds to the reference voltage generated by the conventional voltage generator 8.
【００１４】また、負荷６に代えて、定電圧制御回路
５’から給電されるインバータ31と、このインバータ31
により駆動されるモータ32を設け、前記インバータ31に
モータ32の駆動指令信号を出力する制御装置33を設けて
いる。この制御装置33は、インバータ31へ指令信号を出
力すると同時にリレイ24の励磁信号を出力する。このリ
レイ24の励磁信号が、負荷の使用状態を示す信号とな
る。Further, instead of the load 6, an inverter 31 fed from a constant voltage control circuit 5 ', and this inverter 31
A motor 32 driven by the motor 32 is provided, and a control device 33 that outputs a drive command signal for the motor 32 to the inverter 31 is provided. The control device 33 outputs a command signal to the inverter 31 and at the same time outputs an excitation signal for the relay 24. The excitation signal of the relay 24 becomes a signal indicating the usage state of the load.
【００１５】上記バッテリ21と、基準電圧電圧発生器2
2，23と、リレイ24およびその接点25と、制御装置33と
により設定手段が形成される。上記２次側受電回路の回
路構成による作用を説明する。The battery 21 and the reference voltage generator 2
2, 23, the relay 24 and its contact 25, and the control device 33 form a setting means. The operation of the circuit configuration of the secondary power receiving circuit will be described.
【００１６】高周波、たとえば10kHz の正弦波電流が誘
導線路１に供給され、この誘導線路１に発生する磁束に
より、誘導線路１の周波数に共振するピックアップコイ
ル２に大きな起電力が発生し、この起電力により発生し
た交流電流は整流回路４で整流され、定電圧制御回路
５’により基準電圧ＶE に整圧されてインバータ31に供
給される。A high frequency, eg, 10 kHz sinusoidal current is supplied to the induction line 1, and the magnetic flux generated in the induction line 1 generates a large electromotive force in the pickup coil 2 which resonates at the frequency of the induction line 1. The alternating current generated by the electric power is rectified by the rectifier circuit 4, regulated to the reference voltage V E by the constant voltage control circuit 5 ′, and supplied to the inverter 31.
【００１７】このとき、制御装置33からインバータ31へ
駆動指令信号が出力され、かつリレイ24の励磁信号が出
力されていると、基準電圧電圧発生器22により発生され
る基準電圧ＶE1が基準電圧ＶE として選択され、出力電
圧ＶOUT とコンパレータ９において比較され、出力電圧
ＶOUT は基準電圧ＶE1に制御される。インバータ31は駆
動指令信号に応じて、モータ32へ給電し、給電されたこ
のモータ32は回転し、負荷電力量が増大する。At this time, when the drive command signal is output from the control device 33 to the inverter 31 and the excitation signal of the relay 24 is output, the reference voltage V E1 generated by the reference voltage generator 22 is the reference voltage. It is selected as V E and compared with the output voltage V OUT in the comparator 9, and the output voltage V OUT is controlled to the reference voltage V E1 . The inverter 31 supplies power to the motor 32 in response to the drive command signal, and the supplied motor 32 rotates and the amount of load power increases.
【００１８】制御装置33から出力されるインバータ31へ
の駆動指令信号がオフとなり、同時にリレイ24の励磁信
号がオフとなると、基準電圧電圧発生器23により発生さ
れる基準電圧ＶE2が基準電圧ＶE として選択され、出力
電圧ＶOUT とコンパレータ９において比較され、出力電
圧ＶOUT は基準電圧ＶE2に制御される。インバータ31は
モータ32への給電を停止し、モータ32は停止し、負荷電
力量が減少する。When the drive command signal output from the control device 33 to the inverter 31 is turned off and the excitation signal of the relay 24 is turned off at the same time, the reference voltage V E2 generated by the reference voltage generator 23 is changed to the reference voltage V E2. E is selected and compared with the output voltage V OUT in the comparator 9, and the output voltage V OUT is controlled to the reference voltage V E2 . The inverter 31 stops the power supply to the motor 32, the motor 32 stops, and the load power amount decreases.
【００１９】このように、モータ32が駆動され負荷電力
量が大きいとき、高電圧の基準電圧ＶE1が選択され、モ
ータ32が停止され負荷電力量が小さいとき、低電圧の基
準電圧ＶE2が選択されることによって、トランジスタ10
がオンとなったときトランジスタ10へ流れる過電流は、
図２に示すように、基準電圧ＶE が低いほど少なくなる
ことから、従来のように常に基準電圧ＶE を基準電圧Ｖ
E1に一定としている場合と比較してスイッチング損失を
低減することができる。As described above, when the motor 32 is driven and the load electric energy is large, the high voltage reference voltage V E1 is selected, and when the motor 32 is stopped and the load electric energy is small, the low voltage reference voltage V E2 is selected. Transistor 10 by being selected
When is turned on, the overcurrent flowing to the transistor 10 is
As shown in FIG. 2, the lower the reference voltage V E , the smaller the reference voltage V E.
Switching loss can be reduced as compared with the case where E1 is kept constant.
【００２０】また誘導線路１から給電される２次側受電
回路の数は、負荷に印加される電圧ＶOUT の２乗に反比
例するため、基準電圧ＶE を低電圧に設定することによ
り、２次側受電回路の数を多くすることができる。[0020] The number of secondary side power receiving circuit fed from the induction line 1 is inversely proportional to the square of the voltage V OUT applied to the load, by setting the reference voltage V E to a low voltage, 2 The number of secondary power receiving circuits can be increased.
【００２１】なお、本実施の形態では、負荷電力量を負
荷の使用状態で判断して、２段階に基準電圧を発生させ
ているが、予測される負荷電力量により、基準電圧を切
換えてもよく、また、負荷電力量として複数の電力量が
予測されるとき、この数に合わせて基準電圧を発生さ
せ、切り換えるようにしてもよい。In the present embodiment, the load power amount is judged based on the load usage state to generate the reference voltage in two stages. However, even if the reference voltage is switched depending on the predicted load power amount. Alternatively, when a plurality of power amounts are predicted as the load power amount, the reference voltage may be generated and switched according to this number.
【００２２】[0022]
【発明の効果】以上説明したように本発明によれば、定
電圧制御回路が動作したときに発生する損失はコンデン
サに蓄えられる電荷に依存し、コンデンサに蓄えられる
電荷は基準電圧に依存することにより、負荷電力量に応
じて、基準電圧を設定することにより、損失を減少させ
ることができる。As described above, according to the present invention, the loss generated when the constant voltage control circuit operates depends on the charge stored in the capacitor, and the charge stored in the capacitor depends on the reference voltage. Thus, the loss can be reduced by setting the reference voltage according to the load power amount.
【図１】本発明の実施の形態における無接触給電設備の
２次側受電回路の回路構成図である。FIG. 1 is a circuit configuration diagram of a secondary side power receiving circuit of a contactless power feeding facility according to an embodiment of the present invention.
【図２】同無接触給電設備のトランジスタのオン・オフ
時のトランジスタに流れる電流の特性図である。FIG. 2 is a characteristic diagram of a current flowing through a transistor when the transistor of the contactless power supply equipment is turned on / off.
【図３】従来の無接触給電設備の２次側受電回路の回路
構成図である。FIG. 3 is a circuit configuration diagram of a secondary side power receiving circuit of a conventional contactless power feeding facility.
１ 誘導線路 ２ コイル ３ コイルと共振回路を形成するコンデンサ ４ 整流回路 ５’ 定電圧制御回路 ９ コンパレータ 10 出力調整用トランジスタ 21 バッテリ 22，23 基準電圧電圧発生器 24 リレイ 25 リレイの接点 31 インバータ（負荷） 32 モータ（負荷） 33 制御装置 1 induction line 2 coils 3 Capacitor that forms a resonance circuit with the coil 4 Rectifier circuit 5'constant voltage control circuit 9 comparator 10 Output adjustment transistor 21 battery 22, 23 Reference voltage Voltage generator 24 relay 25 Relay contacts 31 Inverter (load) 32 motor (load) 33 Control device
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H02J 7/00,17/00 H01F 38/14 B60L 5/00 B65G 43/00 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) H02J 7 / 00,17 / 00 H01F 38/14 B60L 5/00 B65G 43/00
Claims (2)
してコイルを設け、このコイルに、コイルとともに誘導
線路の周波数に共振する共振回路を形成するコンデンサ
を接続し、このコンデンサに整流回路を接続し、この整
流回路に、出力電圧を基準電圧に制御する定電圧制御回
路を接続し、この定電圧制御回路より負荷に給電する無
接触給電設備の２次側受電回路であって、 前記定電圧制御回路の基準電圧を、負荷電力量に比例し
て段階的に設定する設定手段を設けたことを特徴とする
無接触給電設備の２次側受電回路。1. A coil is provided so as to face a primary side induction line through which a high-frequency current flows, and a capacitor forming a resonance circuit that resonates at the frequency of the induction line together with the coil is connected to the coil, and the rectifier circuit is connected to this capacitor. A constant voltage control circuit for controlling an output voltage to a reference voltage is connected to the rectifier circuit, and the constant voltage control circuit is a secondary side power receiving circuit for supplying power to a load from the constant voltage control circuit. A secondary side power receiving circuit of a contactless power feeding facility, comprising setting means for setting a reference voltage of a constant voltage control circuit stepwise in proportion to a load power amount.
受電回路であって、 設定手段は、負荷電力量を負荷の使用状態で判断し、基
準電圧を２段階に設定することを特徴とする。2. The secondary-side power receiving circuit of the contactless power supply equipment according to claim 1, wherein the setting means determines the load electric energy based on the usage state of the load and sets the reference voltage in two stages. Characterize.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25405096A JP3518197B2 (en) | 1996-09-26 | 1996-09-26 | Secondary side power receiving circuit of non-contact power supply equipment |
| US08/901,726 US5831841A (en) | 1996-08-02 | 1997-07-28 | Contactless power distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25405096A JP3518197B2 (en) | 1996-09-26 | 1996-09-26 | Secondary side power receiving circuit of non-contact power supply equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10108390A JPH10108390A (en) | 1998-04-24 |
| JP3518197B2 true JP3518197B2 (en) | 2004-04-12 |
Family
ID=17259542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25405096A Expired - Fee Related JP3518197B2 (en) | 1996-08-02 | 1996-09-26 | Secondary side power receiving circuit of non-contact power supply equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3518197B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9548674B2 (en) | 2010-12-15 | 2017-01-17 | Central Japan Railway Company | Electric power receiving device and method of receiving electric power |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000217277A (en) * | 1999-01-19 | 2000-08-04 | Ishikawajima Harima Heavy Ind Co Ltd | Noncontact power supply facility |
| JP4692011B2 (en) * | 2005-02-18 | 2011-06-01 | ミツミ電機株式会社 | Driving circuit and driving method |
| JP5673420B2 (en) * | 2011-08-02 | 2015-02-18 | 株式会社デンソー | DCDC converter |
| JP6356437B2 (en) | 2014-03-03 | 2018-07-11 | 東海旅客鉄道株式会社 | Power receiving device |
| US10141789B2 (en) | 2015-04-14 | 2018-11-27 | Central Japan Railway Company | Converter and power receiving apparatus |
| US10931149B2 (en) * | 2018-06-29 | 2021-02-23 | Etherdyne Technologies, Inc. | Wireless power receiver circuits that provide constant voltage or current to an electrical load, and methods |
| US11362543B2 (en) | 2018-06-29 | 2022-06-14 | Etherdyne Technologies, Inc. | Wireless power receiver circuits that provide constant voltage or current to an electrical load, and methods |
-
1996
- 1996-09-26 JP JP25405096A patent/JP3518197B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9548674B2 (en) | 2010-12-15 | 2017-01-17 | Central Japan Railway Company | Electric power receiving device and method of receiving electric power |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10108390A (en) | 1998-04-24 |
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