JPH10285836A - Receiving device of electromagnetic induction power supply unit - Google Patents
Receiving device of electromagnetic induction power supply unitInfo
- Publication number
- JPH10285836A JPH10285836A JP9080846A JP8084697A JPH10285836A JP H10285836 A JPH10285836 A JP H10285836A JP 9080846 A JP9080846 A JP 9080846A JP 8084697 A JP8084697 A JP 8084697A JP H10285836 A JPH10285836 A JP H10285836A
- Authority
- JP
- Japan
- Prior art keywords
- receiving coil
- electromagnetic induction
- receiving device
- load impedance
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Inverter Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は電磁誘導作用により
給電装置から非接触にて受電装置に電力を供給する電磁
誘導電源装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic induction power supply for supplying electric power from a power supply to a power receiving device in a non-contact manner by an electromagnetic induction action.
【０００２】[0002]
【従来の技術】図３は従来の電磁誘導電源装置の受電装
置の回路図である。同図において、誘導磁界１のエネル
ギーを受電コイル２で受電した電力は、交流電力となる
ため、ダイオードブリッジ７で全波整流し、平滑コンデ
ンサ８で直流化する。この後、必要であれば、電圧調整
回路９で電圧を安定化し、負荷出力１１に出力し、負荷
回路に電力を供給する（特開昭６３−１２４７３５号公
報参照）。2. Description of the Related Art FIG. 3 is a circuit diagram of a power receiving device of a conventional electromagnetic induction power supply. In the figure, the power received by the power receiving coil 2 from the energy of the induction magnetic field 1 is AC power, so that it is full-wave rectified by the diode bridge 7 and converted to DC by the smoothing capacitor 8. Thereafter, if necessary, the voltage is stabilized by the voltage adjusting circuit 9 and output to the load output 11 to supply power to the load circuit (see JP-A-63-124735).
【０００３】[0003]
【発明が解決しようとする課題】従来技術の第一の問題
点は、受電コイルの出力電圧が小さく、電力伝送効率が
悪いことである。誘導電源方式は、通常のトランス等に
よる電力伝送と異なり、磁界を伝達する磁心がないた
め、漏れ滋束が多く伝送効率を極端に悪化させてしま
う。また、磁心がないため磁束密度が小さく、受電コイ
ルの巻き数を多くしないと負荷に供給する電圧が得られ
ないが、受電コイル巻き数を多くするとコイルインピー
ダンスが大きくなってしまう。The first problem of the prior art is that the output voltage of the receiving coil is small and the power transmission efficiency is poor. The inductive power supply system has a magnetic core that does not transmit a magnetic field unlike power transmission using a normal transformer or the like, and therefore has a large amount of leakage and extremely deteriorates transmission efficiency. Further, since there is no magnetic core, the magnetic flux density is low, and a voltage to be supplied to the load cannot be obtained unless the number of turns of the receiving coil is increased. However, if the number of turns of the receiving coil is increased, the coil impedance increases.
【０００４】また、第二の問題点は、第一の問題点であ
る出力電圧の小さいことを解決するために受電コイル側
を直列共振回路とした場合には、一定負荷での使用の制
約がある。[0004] The second problem is that if a series resonance circuit is used on the power receiving coil side in order to solve the first problem, that is, a small output voltage, there is a restriction on use at a constant load. is there.
【０００５】本発明の目的は、誘導電源に使用される受
電装置側の伝送効率の向上及び負荷インピーダンスの変
動に対応できる受電装置を提供することである。An object of the present invention is to provide a power receiving device that can improve the transmission efficiency of a power receiving device used for an inductive power supply and can cope with fluctuations in load impedance.
【０００６】[0006]
【課題を解決するための手段】本発明は、受電コイルの
巻き線の途中にいくつかの引き出し線と、その巻き数に
対応する共振コンデンサと、負荷インピーダンスの変動
に対応して伝送効率が最適となるように引き出し線とダ
イオードブリッジとの接続を切り替えるスイッチ手段と
を備える。SUMMARY OF THE INVENTION According to the present invention, there are provided several lead wires in the middle of a winding of a receiving coil, a resonance capacitor corresponding to the number of windings, and an optimum transmission efficiency corresponding to a change in load impedance. Switch means for switching the connection between the lead wire and the diode bridge so that
【０００７】[0007]
【発明の実施の形態】本発明の実施の一形態を示す図１
及び図２を参照すると、この受電装置は、受電コイル２
（詳細は図２）とそのコイルに対応した直列共振コンデ
ンサ５とにより、磁束密度の小さい場合でも少ない巻き
数で高い出力電圧を得る。つまり、誘導磁界１側からみ
た回路のＱ値を大きくしている訳である。並列共振回路
のＱ値は、受電コイル２のＬ（Ｈ），Ｒ（Ω），共振コ
ンデンサ５のＣ（Ｆ），誘導磁界１の周波数（Ｈｚ）及
び負荷インピーダンス（Ω）で決定される。負荷インピ
ーダンスが決定されると、最適なＱ値を得るための受電
コイル２の巻き数及び共振コンデンサ５の容量が決定で
きることになる。そこで、負荷インピーダンスが変動す
る場合は、その変動に合わせて、受電コイル２の巻き数
を引き出し線の場所を変えることによって最適値に合わ
せる。引き出し線の場所の変更は、切り替えスイッチ４
及び６を切り替えることによって実施する。この切り替
えは出力電力をモニタしているスイッチ制御回路１０に
よって実施することができる。他の構成は従来と同様で
ある。FIG. 1 shows an embodiment of the present invention.
Referring to FIG. 2 and FIG. 2, the power receiving device includes a power receiving coil 2.
(See FIG. 2 for details) and the series resonant capacitor 5 corresponding to the coil, a high output voltage can be obtained with a small number of turns even when the magnetic flux density is small. That is, the Q value of the circuit as viewed from the induction magnetic field 1 is increased. The Q value of the parallel resonance circuit is determined by L (H) and R (Ω) of the power receiving coil 2, C (F) of the resonance capacitor 5, frequency (Hz) of the induction magnetic field 1, and load impedance (Ω). When the load impedance is determined, the number of turns of the power receiving coil 2 and the capacity of the resonance capacitor 5 for obtaining the optimum Q value can be determined. Therefore, when the load impedance fluctuates, the number of turns of the power receiving coil 2 is adjusted to an optimum value by changing the location of the lead wire in accordance with the fluctuation. To change the position of the leader line, use the changeover switch 4
And 6 are switched. This switching can be performed by the switch control circuit 10 monitoring the output power. Other configurations are the same as the conventional one.
【０００８】[0008]
【発明の効果】本発明により、インピーダンスの大きく
変動する負荷に対しても、誘導電源により効率よく電力
を伝送することができる。According to the present invention, power can be efficiently transmitted by the inductive power supply even to a load whose impedance greatly varies.
【図１】本発明の実施の一形態の回路図。FIG. 1 is a circuit diagram of one embodiment of the present invention.
【図２】図１に示す受電コイルの詳細構成図。FIG. 2 is a detailed configuration diagram of a power receiving coil shown in FIG. 1;
【図３】従来の受電装置の回路図。FIG. 3 is a circuit diagram of a conventional power receiving device.
１ 誘導磁界 ２ 受電コイル ３ 受電コイル引き出し線 ４ 切り替えスイッチ ５ 並列共振コンデンサ ６ 切り替えスイッチ ７ ダイオードブリッジ ８ 平滑用コンデンサ ９ 電圧調整回路 １０ スイッチ制御回路 １１ 電圧出力 DESCRIPTION OF SYMBOLS 1 Induction magnetic field 2 Receiving coil 3 Receiving coil lead wire 4 Changeover switch 5 Parallel resonance capacitor 6 Changeover switch 7 Diode bridge 8 Smoothing capacitor 9 Voltage adjustment circuit 10 Switch control circuit 11 Voltage output
Claims (2)
される電磁誘導電源装置の受電装置において、電磁誘導
の磁界周波数と共振するように設定された受電コイル及
び共振用コンデンサを備えることを特徴とする電磁誘導
電源装置の受電装置。1. A power receiving device for an electromagnetic induction power supply device which is supplied with electric power in a non-contact manner by an electromagnetic induction action, comprising a power receiving coil and a resonance capacitor set to resonate with a magnetic field frequency of electromagnetic induction. Power receiving device of the electromagnetic induction power supply device.
の引き出し線を設け、その巻き線数に対応する前記共振
用コンデンサを持ち、負荷への必要供給電力によってこ
の組み合わせをスイッチ手段により切り替えることを特
徴とする請求項１記載の電磁誘導電源装置の受電装置。2. A method according to claim 1, wherein a plurality of lead wires are provided in the middle of the winding of the power receiving coil, the resonance capacitors corresponding to the number of windings are provided, and the combination is switched by a switch means depending on required power supplied to a load. The power receiving device for an electromagnetic induction power supply device according to claim 1, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9080846A JPH10285836A (en) | 1997-03-31 | 1997-03-31 | Receiving device of electromagnetic induction power supply unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9080846A JPH10285836A (en) | 1997-03-31 | 1997-03-31 | Receiving device of electromagnetic induction power supply unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10285836A true JPH10285836A (en) | 1998-10-23 |
Family
ID=13729724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9080846A Pending JPH10285836A (en) | 1997-03-31 | 1997-03-31 | Receiving device of electromagnetic induction power supply unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10285836A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001238372A (en) * | 2000-02-24 | 2001-08-31 | Nippon Telegr & Teleph Corp <Ntt> | Power transmission system, electromagnetic field generator, and electromagnetic field receiver |
| JP2010158151A (en) * | 2008-12-01 | 2010-07-15 | Toyota Industries Corp | Contactless power transmission apparatus |
| KR101369415B1 (en) * | 2012-03-20 | 2014-03-06 | 한양대학교 산학협력단 | Transmitter used in wireless power transfer and wireless power transfer system having the same |
| EP2361435B2 (en) † | 2008-12-22 | 2018-04-11 | Siemens Aktiengesellschaft | Transformer for transformation between medium and low voltage with a step switch and its operating method |
| US9979231B2 (en) | 2014-02-10 | 2018-05-22 | Canon Kabushiki Kaisha | Electronic apparatus, method for controlling the same, and storage medium |
| CN111532151A (en) * | 2020-05-09 | 2020-08-14 | 天津理工大学 | System and method for wireless charging of electric automobile |
| US11070086B2 (en) | 2017-03-29 | 2021-07-20 | Fujitsu Limited | Power receiving unit, power transmission system, and method of controlling the power receiving unit |
-
1997
- 1997-03-31 JP JP9080846A patent/JPH10285836A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001238372A (en) * | 2000-02-24 | 2001-08-31 | Nippon Telegr & Teleph Corp <Ntt> | Power transmission system, electromagnetic field generator, and electromagnetic field receiver |
| JP2010158151A (en) * | 2008-12-01 | 2010-07-15 | Toyota Industries Corp | Contactless power transmission apparatus |
| EP2361435B2 (en) † | 2008-12-22 | 2018-04-11 | Siemens Aktiengesellschaft | Transformer for transformation between medium and low voltage with a step switch and its operating method |
| KR101369415B1 (en) * | 2012-03-20 | 2014-03-06 | 한양대학교 산학협력단 | Transmitter used in wireless power transfer and wireless power transfer system having the same |
| US9979231B2 (en) | 2014-02-10 | 2018-05-22 | Canon Kabushiki Kaisha | Electronic apparatus, method for controlling the same, and storage medium |
| US11070086B2 (en) | 2017-03-29 | 2021-07-20 | Fujitsu Limited | Power receiving unit, power transmission system, and method of controlling the power receiving unit |
| CN111532151A (en) * | 2020-05-09 | 2020-08-14 | 天津理工大学 | System and method for wireless charging of electric automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20000523 |