JP2001128375A - Noncontact type feeder system - Google Patents

Noncontact type feeder system

Info

Publication number
JP2001128375A
JP2001128375A JP30947899A JP30947899A JP2001128375A JP 2001128375 A JP2001128375 A JP 2001128375A JP 30947899 A JP30947899 A JP 30947899A JP 30947899 A JP30947899 A JP 30947899A JP 2001128375 A JP2001128375 A JP 2001128375A
Authority
JP
Japan
Prior art keywords
power supply
power
supplied
unit
current
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
Application number
JP30947899A
Other languages
Japanese (ja)
Inventor
Yoichi Hodozuka
Naoto Hosoyama
洋一 程塚
尚登 細山
Original Assignee
Matsushita Electric Ind Co Ltd
松下電器産業株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Ind Co Ltd, 松下電器産業株式会社 filed Critical Matsushita Electric Ind Co Ltd
Priority to JP30947899A priority Critical patent/JP2001128375A/en
Publication of JP2001128375A publication Critical patent/JP2001128375A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a noncontact type feeder system, capable of supplying electric power with high efficiency according to the load of an apparatus to be powered. SOLUTION: This noncontact type feeder system, performing noncontact feeding from a feeding system 201 to an apparatus 202 to be powered, is provided with a current detecting means 206 for detecting feeding current and a voltage-control means 205 for controlling feeding voltage, based on the detected results of the current detecting means. The feeding current depends on the load of the apparatus to be powered, so that the feeding current is detected and voltage is controlled according to its magnitude. Accordingly, electric power suitable for the load of the apparatus to be power can be supplied.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【発明の属する技術分野】本発明は、給電装置から被給
電装置に非接触で電力を供給する非接触給電装置に関
し、特に、被給電装置に最適なレベルの電力を供給でき
るようにしたものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact power supply apparatus for supplying electric power from a power supply apparatus to a power-supplied apparatus in a non-contact manner, and more particularly to an apparatus capable of supplying an optimum level of power to a power-supplied apparatus. is there.
【0002】[0002]
【従来の技術】従来、電気カミソリや携帯端末など、各
種の電気機器への給電に、電磁誘導を利用した非接触給
電が行われている。図3には、非接触給電の一例とし
て、充電装置(給電装置)31と、この充電装置31に載置
して充電が行われる携帯端末(被給電装置)32を示して
いる。
2. Description of the Related Art Conventionally, non-contact power supply using electromagnetic induction has been used for power supply to various electric devices such as electric razors and portable terminals. FIG. 3 shows, as an example of non-contact power supply, a charging device (power supply device) 31 and a portable terminal (power-supplied device) 32 mounted on the charging device 31 to perform charging.
【0003】従来の非接触給電では、図4に示すよう
に、給電装置101が、電源部104と給電部105とを備え、
また、被給電装置102が、被給電部106と負荷107とを備
えており、この給電部105と被給電部106とで非接触給電
部103を構成し、非接触給電部103を通じて、給電装置10
1から被給電装置102に電力が供給される。
In the conventional non-contact power supply, as shown in FIG. 4, a power supply device 101 includes a power supply unit 104 and a power supply unit 105,
The power-supplied device 102 includes a power-supplied unit 106 and a load 107. The power-supplied unit 105 and the power-supplied unit 106 constitute a non-contact power-supply unit 103. Ten
Power is supplied to the power-supplied device 102 from 1.
【0004】図5は、この給電装置101及び被給電装置1
02の回路構成の一例を示している。給電装置101の電源
部104は、電源VCCをオンオフするスイッチ11と、電
圧を一定に制御するDC−DCコンバータ12及びMOS
−FET20とを具備し、給電部105は、共振回路を構成
するコイル16及びコンデンサ15と、共振回路に同調する
周波数で発振する発振器13と、交流を作り出すために発
振器13の発振周波数でオンオフするMOS−FET14と
を具備している。
FIG. 5 shows the power supply apparatus 101 and the power-supplied apparatus 1.
02 shows an example of the circuit configuration of FIG. The power supply unit 104 of the power supply apparatus 101 includes a switch 11 for turning on and off the power supply VCC, a DC-DC converter 12 for controlling the voltage to be constant, and a MOS
-A power supply unit 105 comprising an FET 20; a coil 16 and a capacitor 15 constituting a resonance circuit; an oscillator 13 oscillating at a frequency tuned to the resonance circuit; and an oscillation frequency of the oscillator 13 for generating alternating current. And a MOS-FET 14.
【0005】また、被給電装置102の被給電部106は、給
電部105のコイル16に電磁結合するコイル17と、ダイオ
ード18と共に、負荷107に供給するための直流を生成す
るコンデンサ19とを具備している。
The power-supplied portion 106 of the power-supplied device 102 includes a coil 17 that is electromagnetically coupled to the coil 16 of the power-supplying portion 105, a diode 18, and a capacitor 19 that generates a direct current to be supplied to a load 107. are doing.
【0006】この装置では、給電装置101のスイッチ11
を入れ、給電装置101の給電部105と被給電装置102の被
給電部106とを近接させて配置することにより、給電装
置101から被給電装置102への電力供給が行われる。給電
装置101のスイッチ11は、給電が頻繁に行われる場合に
は、通常、オンのままにされる。
In this device, the switch 11 of the power supply device 101
And the power supply unit 105 of the power supply apparatus 101 and the power supply unit 106 of the power supply target apparatus 102 are arranged close to each other, so that power supply from the power supply apparatus 101 to the power supply apparatus 102 is performed. The switch 11 of the power supply apparatus 101 is normally kept on when power is frequently supplied.
【0007】[0007]
【発明が解決しようとする課題】しかし、従来の非接触
給電では、被給電装置102の負荷107が要求する最大電力
に合わせた電力を給電装置101が供給し続けるため、被
給電装置102の負荷107が減少し、その消費電力が減少す
ると、給電装置101により供給される電力が供給過多と
なり、電力供給の効率が悪化する。また、この場合、被
給電装置102の発熱を引き起こし、機器の性能に悪影響
を与えると云う問題もある。
However, in the conventional non-contact power supply, since the power supply apparatus 101 continues to supply power corresponding to the maximum power required by the load 107 of the power supply target apparatus 102, the load of the power supply target apparatus 102 is reduced. When 107 decreases and its power consumption decreases, the power supplied by the power supply apparatus 101 becomes excessively supplied, and the power supply efficiency deteriorates. In this case, there is also a problem that the power-supplied device 102 generates heat, which adversely affects the performance of the device.
【0008】本発明は、こうした従来の問題点を解決す
るものであり、被給電装置の負荷に応じて、効率的に電
力を供給することができる非接触給電装置を提供するこ
とを目的としている。
An object of the present invention is to solve such a conventional problem and to provide a non-contact power supply device capable of efficiently supplying power according to the load of a power-supplied device. .
【0009】[0009]
【課題を解決するための手段】そこで、本発明では、給
電装置から被給電装置への非接触給電を行う非接触給電
装置において、給電装置に、給電電流を検出する電流検
出手段と、電流検出手段の検出結果に基づいて給電電圧
を制御する電圧制御手段とを設けている。
SUMMARY OF THE INVENTION Accordingly, the present invention provides a non-contact power supply device for performing non-contact power supply from a power supply device to a power-supplied device. Voltage control means for controlling the power supply voltage based on the detection result of the means.
【0010】給電電流は、被給電装置の負荷によって変
化するため、給電電流を検出し、その大きさに応じて電
圧を制御することにより、被給電装置の負荷に適した電
力を供給することができる。
Since the power supply current varies depending on the load of the power-supplied device, it is possible to supply the power suitable for the load of the power-supplied device by detecting the power supply current and controlling the voltage according to the magnitude of the current. it can.
【0011】[0011]
【発明の実施の形態】本発明の実施形態における非接触
給電装置は、図1に示すように、電力を供給する給電装
置201には、電源部204と、給電電圧を制御する電圧制御
部205と、給電電流を検出し、制御線207を通じて電圧制
御部205に伝える電流検出部206と、非接触給電部203を
構成する給電装置208と、被給電装置の有無を検出する
検出部211と、検出部211の検出結果に基づいて電源部20
4をオンオフする非接触のスイッチ212とを備えている。
また、電力供給を受ける被給電装置202は、被給電部209
と、負荷210と、光などで被給電装置202の存在を伝える
通知部210とを備えている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a contactless power supply device according to an embodiment of the present invention includes a power supply device 201 for supplying power, a power supply unit 204, and a voltage control unit 205 for controlling a supply voltage. A current detection unit 206 that detects a power supply current and transmits the voltage to a voltage control unit 205 through a control line 207, a power supply device 208 included in the non-contact power supply unit 203, and a detection unit 211 that detects the presence or absence of a power supply target device. The power supply unit 20 based on the detection result of the detection unit 211
And a non-contact switch 212 for turning on and off the switch 4.
The power-supplied device 202 that receives power is
, A load 210, and a notification unit 210 that notifies the presence of the power-supplied device 202 by light or the like.
【0012】この装置では、被給電装置202が、通知部2
10として発光ダイオードなどを有しており、給電装置20
1は、検出部211がこの光を検出した場合に、電源部204
をスイッチオンする。
In this device, the power-supplied device 202 is
The power supply device 20 has a light emitting diode or the like as 10.
1 indicates that when the detection unit 211 detects this light,
Switch on.
【0013】また、被給電装置202への給電が開始され
ると、給電電流を検出し、その電流の大きさに基づい
て、給電電圧を制御する。給電状態においては、被給電
装置202の負荷210が大きいときには、給電装置201の給
電部208に大きな電流が流れ、また、被給電装置202の負
荷203が小さいときには、給電装置部208に小さな電流が
流れる。電流検出部206は、この給電電流を検出し、検
出結果を基に、制御線207を通じて電圧制御部205を制御
する。
When the power supply to the power-supplied device 202 is started, the power supply current is detected, and the power supply voltage is controlled based on the magnitude of the current. In the power supply state, a large current flows through the power supply unit 208 of the power supply apparatus 201 when the load 210 of the power supply apparatus 202 is large, and a small current flows through the power supply apparatus unit 208 when the load 203 of the power supply apparatus 202 is small. Flows. The current detection unit 206 detects the power supply current, and controls the voltage control unit 205 via the control line 207 based on the detection result.
【0014】それにより、被給電装置202の負荷210が大
きいときは、給電電圧が高められ、被給電装置202の負
荷210が小さいときは、給電電圧が抑えられる。その結
果、被給電装置202の消費電力が大きいときにも、必要
な電力が給電装置201から供給され、また、被給電装置2
02の消費電力が少ないときにも、給電装置201には必要
な電力だけが供給される。
Thus, when the load 210 of the power-supplied device 202 is large, the power supply voltage is increased, and when the load 210 of the power-supplied device 202 is small, the power supply voltage is suppressed. As a result, even when the power consumption of the power-supplied device 202 is large, necessary power is supplied from the power-supplying device 201, and
Even when the power consumption of 02 is small, only the necessary power is supplied to the power supply device 201.
【0015】また、ここで図1に示す電流検出部206を
被給電装置202の被給電部209と負荷200との間に設け、
電流検出結果を通知部210より給電装置201の検出部211
へ伝え、検出部211はスイッチ212のみで無く電圧制御部
205を制御する構成も可能である。
Further, the current detecting unit 206 shown in FIG. 1 is provided between the power-supplied unit 209 of the power-supplied device 202 and the load 200,
The current detection result is notified from the notification unit 210 to the detection unit 211 of the power supply device 201.
The detection unit 211 is not only a switch 212 but also a voltage control unit.
A configuration for controlling 205 is also possible.
【0016】図2は、この非接触給電装置の回路構成の
一例を示している。
FIG. 2 shows an example of a circuit configuration of the contactless power supply device.
【0017】給電装置201の電源部204は、スイッチ部21
2からの信号に基づいて電源部204をオンオフするMOS
−FET41、42と、給電電流に基づいて電圧を制御する
DC−DCコンバータ43及びMOS−FET44とを具備
し、電流検出部206は、電流を検出する電流検出IC45
を具備し、電圧制御部205は、電流検出IC45の出力を
基準値と比較するOPアンプ46を具備し、スイッチ部21
1、212は、光を検知する光センサー51と、光センサー51
の検出出力に応じてオンオフするトランジスタ52とを具
備し、また、給電部208は、従来の装置(図5)と同様
に、コイル50、コンデンサ49、発振器47及びMOS−F
ET48を具備している。
The power supply unit 204 of the power supply apparatus 201 includes a switch unit 21
MOS that turns on / off the power supply unit 204 based on the signal from 2
A current detecting unit 206 that includes FETs 41 and 42, a DC-DC converter 43 that controls a voltage based on a supply current, and a MOS-FET 44;
The voltage control unit 205 includes an OP amplifier 46 that compares the output of the current detection IC 45 with a reference value.
1, 212 are an optical sensor 51 for detecting light and an optical sensor 51
And a transistor 52 that is turned on and off in accordance with the detection output of the power supply unit. The power supply unit 208 includes a coil 50, a capacitor 49, an oscillator 47, and a MOS-F as in the conventional device (FIG. 5).
Equipped with ET48.
【0018】また、被給電装置202は、通知部210に発光
ダイオード64を具備し、被給電部209には、従来の装置
(図5)と同様に、コイル61、コンデンサ62及びダイオ
ード63を具備している。
The power-supplied device 202 includes a light-emitting diode 64 in the notification unit 210, and a coil 61, a capacitor 62, and a diode 63 in the power-supplied unit 209, as in the conventional device (FIG. 5). are doing.
【0019】この装置では、給電装置201の光センサー5
1が被給電装置202の発光ダイオード64の光を検知してオ
ンになると、トランジスタ52がオンになり、電源部204
のMOS−FET42、41がオンになって、電源電圧VC
Cが非接触給電部203の給電部208に供給され、被給電装
置202への給電が開始される。
In this device, the optical sensor 5 of the power feeding device 201
When 1 detects the light of the light emitting diode 64 of the power-supplied device 202 and turns on, the transistor 52 turns on and the power supply unit 204
MOS-FETs 42 and 41 are turned on, and the power supply voltage VC
C is supplied to the power supply unit 208 of the non-contact power supply unit 203, and power supply to the power-supplied device 202 is started.
【0020】給電部208のコイル50に流れる電流は、図
2(a)に示すように、被給電装置202の負荷210が大き
い時には振幅が大きくなり、負荷210が小さいときには
振幅が小さくなる。電流検出部206の電流は、コンデン
サ等により直流が流れ、図2(b)に示すように、被給
電装置202の負荷210により、そのレベルが変化する。電
流検出IC45は、この電流を検出してOPアンプ46に出
力し、OPアンプ46は、この電流と基準値との差分を出
力する。OPアンプ46の出力は、図2(c)のようにな
る。
As shown in FIG. 2A, the current flowing through the coil 50 of the power supply unit 208 has a large amplitude when the load 210 of the power-supplied device 202 is large, and has a small amplitude when the load 210 is small. As for the current of the current detection unit 206, a direct current flows through a capacitor or the like, and the level changes due to the load 210 of the power-supplied device 202, as shown in FIG. The current detection IC 45 detects this current and outputs it to the OP amplifier 46. The OP amplifier 46 outputs the difference between this current and a reference value. The output of the OP amplifier 46 is as shown in FIG.
【0021】OPアンプ46の出力はDC−DCコンバー
タ43にフィードバックされ、DC−DCコンバータ43
は、入力する電流に応じた電圧を出力し、それにより、
電源部204の電力は、負荷210が必要としているレベルに
調整される。
The output of the OP amplifier 46 is fed back to the DC-DC converter 43, and the DC-DC converter 43
Outputs a voltage corresponding to the input current,
The power of the power supply unit 204 is adjusted to a level required by the load 210.
【0022】なお、図2では、DC−DCコンバータ43
として、ステップアップDC−DCコンバータを示して
いるが、これはステップダウンDC−DCコンバータで
あっても良い。
In FIG. 2, the DC-DC converter 43
Is a step-up DC-DC converter, but this may be a step-down DC-DC converter.
【0023】また、この実施形態では、被給電装置を検
知して電源部をオンオフするスイッチを設けているが、
これは、従来のように、手動で行うようにしても良い。
Further, in this embodiment, a switch for detecting the power-supplied device and turning on and off the power supply unit is provided.
This may be done manually as in the prior art.
【0024】[0024]
【発明の効果】以上の説明から明らかなように、本発明
の非接触給電装置では、被給電装置の消費電力が大きい
ときには給電電力が大きく、被給電装置の消費電力が小
さいときには給電電力を小さく調整することが出来るの
で、常に最適な電力供給が可能であり、被給電装置の発
熱も抑えることができる。
As is apparent from the above description, in the non-contact power feeding device of the present invention, the feeding power is large when the power consumption of the power receiving device is large, and the power feeding power is small when the power consumption of the power receiving device is low. Since the adjustment can be performed, optimal power supply is always possible, and heat generation of the power-supplied device can be suppressed.
【図面の簡単な説明】[Brief description of the drawings]
【図1】本発明の実施形態における非接触給電装置の構
成を示すブロック図、
FIG. 1 is a block diagram showing a configuration of a wireless power supply device according to an embodiment of the present invention;
【図2】本発明の実施形態における非接触給電装置を構
成する回路図、
FIG. 2 is a circuit diagram of a wireless power supply device according to the embodiment of the present invention;
【図3】非接触給電装置の具体例、FIG. 3 is a specific example of a non-contact power supply device,
【図4】従来の非接触給電装置の構成を示すブロック
図、
FIG. 4 is a block diagram showing a configuration of a conventional wireless power supply device;
【図5】従来の非接触給電装置を構成する回路図であ
る。
FIG. 5 is a circuit diagram of a conventional wireless power supply device.
【符号の説明】[Explanation of symbols]
11 スイッチ 12、43 DC−DCコンバータ 13、47 発振器 14、48 MOS−FET 15 コンデンサ 16 コイル 17、61 コイル 18、62 ダイオード 19、63 コンデンサ 20、44 MOS−FET 31、101、201 給電装置 32、102、202 被給電装置 41、42 MOS−FET 45 電流検出IC 46 OPアンプ 49 コンデンサ 50 コイル 51 光センサー 52 トランジスタ 64 発光ダイオード 103、203 非接触給電部 104、204 電源部 105、208 給電部 106、209 被給電部 107、200 負荷 205 電圧制御部 206 電流検出部 207 制御線 11 Switch 12, 43 DC-DC converter 13, 47 Oscillator 14, 48 MOS-FET 15 Capacitor 16 Coil 17, 61 Coil 18, 62 Diode 19, 63 Capacitor 20, 44 MOS-FET 31, 101, 201 Power supply device 32, 102, 202 Powered device 41, 42 MOS-FET 45 Current detection IC 46 OP amplifier 49 Capacitor 50 Coil 51 Optical sensor 52 Transistor 64 Light emitting diode 103, 203 Non-contact power supply 104, 204 Power supply 105, 208 Power supply 106, 209 Power-supplied unit 107, 200 Load 205 Voltage control unit 206 Current detection unit 207 Control line
フロントページの続き Fターム(参考) 5G003 BA01 CC07 DA02 DA15 GB08 5H410 BB04 CC02 DD02 DD09 DD10 EA11 EA39 EB04 EB32 EB37 FF03 FF05 FF25 Continued on the front page F term (reference) 5G003 BA01 CC07 DA02 DA15 GB08 5H410 BB04 CC02 DD02 DD09 DD10 EA11 EA39 EB04 EB32 EB37 FF03 FF05 FF25

Claims (3)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 給電装置から被給電装置への非接触給電
    を行う非接触給電装置において、 前記給電装置が、 給電電流を検出する電流検出手段と、 前記電流検出手段の検出結果に基づいて給電電圧を制御
    する電圧制御手段とを備えることを特徴とする非接触給
    電装置。
    1. A non-contact power supply device for performing non-contact power supply from a power supply device to a power-supplied device, wherein the power supply device supplies a current based on a detection result of the current detection unit. A non-contact power supply device comprising: voltage control means for controlling a voltage.
  2. 【請求項2】 前記給電装置が、被給電装置を非接触検
    知する非接触検知手段を具備し、前記非接触検知手段が
    被給電装置を検知したとき、給電を開始することを特徴
    とする請求項1に記載の非接触給電装置。
    2. The power supply device further includes non-contact detection means for detecting the power-supplied device in a non-contact manner, and starts power supply when the non-contact detection means detects the power-supplied device. Item 2. The non-contact power supply device according to Item 1.
  3. 【請求項3】 前記被給電装置が発光手段を具備し、前
    記給電装置の非接触検知手段が、前記発光手段の発光を
    検知することを特徴とする請求項2に記載の非接触給電
    装置。
    3. The non-contact power supply device according to claim 2, wherein the power-supplied device includes a light-emitting unit, and the non-contact detection unit of the power supply device detects light emission of the light-emitting unit.
JP30947899A 1999-10-29 1999-10-29 Noncontact type feeder system Pending JP2001128375A (en)

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JP30947899A JP2001128375A (en) 1999-10-29 1999-10-29 Noncontact type feeder system

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Country Link
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