JP3089714B2 - Power supply for parallel operation - Google Patents
Power supply for parallel operationInfo
- Publication number
- JP3089714B2 JP3089714B2 JP03166590A JP16659091A JP3089714B2 JP 3089714 B2 JP3089714 B2 JP 3089714B2 JP 03166590 A JP03166590 A JP 03166590A JP 16659091 A JP16659091 A JP 16659091A JP 3089714 B2 JP3089714 B2 JP 3089714B2
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- output voltage
- supply device
- output
- voltage
- 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.)
- Expired - Fee Related
Links
Landscapes
- Direct Current Feeding And Distribution (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は並列運転用電源装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply unit for parallel operation.
【０００２】[0002]
【従来の技術】従来の並列運転用電源装置は、図２に示
す様に、微小な抵抗値を有する電流バランス用のバラン
ス抵抗２７，３７を電源装置２ａ，３ａの出力段に接続
するか、もしくは負荷ケーブルの抵抗を利用し、その電
圧降下により、各電源装置２ａ，３ａの電流のバランス
をとる構成となっていた。2. Description of the Related Art As shown in FIG. 2, a conventional power supply unit for parallel operation connects balance resistors 27 and 37 for current balance having minute resistance values to output stages of power supply units 2a and 3a. Alternatively, the current of each power supply device 2a, 3a is balanced by utilizing the resistance of the load cable and the voltage drop.
【０００３】[0003]
【発明が解決しようとする課題】上述した従来の並列運
転用電源装置は、バランス抵抗として出力インピーダン
スが存在する為、下記の欠点がある。The above-described conventional power supply for parallel operation has the following drawbacks because the output impedance exists as a balance resistor.
【０００４】（１）電源装置から負荷迄の抵抗を考慮し
て、出力電圧微調整等のバランス調整を行なう必要があ
る。(1) It is necessary to perform balance adjustment such as fine adjustment of output voltage in consideration of the resistance from the power supply to the load.
【０００５】（２）効率が悪く、また応答性も良くな
い。(2) The efficiency is poor and the response is not good.
【０００６】[0006]
【課題を解決するための手段】本発明の並列運転用電源
装置は、それぞれの出力端子に同一負荷を接続して電力
を供給する第１の電源装置と第２の電源装置とからな
り、前記第１及び第２の電源装置は、それぞれ負荷電流
の増加に伴い発生する発熱を検出する負の温度係数を有
する温度検出素子を出力電圧変動幅制限用抵抗と直列に
接続してなる温度補償回路を有し、前記出力端子に接続
する出力電圧検出用分圧抵抗に対して検出温度が上昇す
ると前記第１又は第２の電源装置の出力電圧を微小に低
下させる様に前記温度補償回路を接続して前記出力電圧
検出用分圧抵抗の出力電圧が上昇すると前記出力電圧を
低下させる帰還回路を有している。A power supply device for parallel operation according to the present invention comprises a first power supply device and a second power supply device for supplying electric power by connecting the same load to each output terminal. Each of the first and second power supply devices includes a temperature detecting element having a negative temperature coefficient for detecting heat generated with an increase in load current in series with the output voltage fluctuation width limiting resistor.
A temperature compensating circuit connected to the output terminal, the output voltage of the first or second power supply device being slightly reduced when the detected temperature rises with respect to the output voltage detecting voltage dividing resistor connected to the output terminal. the output voltage by connecting the temperature compensation circuit to
When the output voltage of the detection voltage dividing resistor rises, the output voltage is reduced.
It has a feedback circuit to lower it .
【０００７】[0007]
【実施例】次に、本発明について図面を参照して説明す
る。Next, the present invention will be described with reference to the drawings.
【０００８】図１は本発明の一実施例を示すブロック図
である。FIG. 1 is a block diagram showing one embodiment of the present invention.
【０００９】図１において、本実施例の電源装置２，３
は共に負荷１に電力を供給して並列運転されている。電
源装置２は負荷１へ電圧を供給する電圧源２５と、負荷
１への出力電圧を分圧して検出するための出力電圧検出
用抵抗２３，２４と、出力電圧検出用抵抗２３に並列接
続された温度保償回路４と、出力電圧検出用抵抗２４に
よる検出電圧によって電圧源２５を制御する制御回路２
６とを有し、温度保償回路４は出力電圧変動幅制限用抵
抗２１とサーミスタ２２とが直列接続して構成してい
る。同様に電源装置３も電源装置２と同様に、電圧源３
５と、出力電圧検出用抵抗３３，３４と、温度保償回路
５と、制御回路２６とを有し、温度保償回路５は出力電
圧変動幅制限用抵抗３１とサーミスタ３２とが直列に接
続して構成してる。尚、サーミスタ２２，３２は負の温
度係数を有している。In FIG. 1, power supply units 2 and 3 of the present embodiment are shown.
Are operated in parallel by supplying power to the load 1. The power supply device 2 is connected in parallel to a voltage source 25 that supplies a voltage to the load 1, output voltage detection resistors 23 and 24 for dividing and detecting an output voltage to the load 1, and an output voltage detection resistor 23. A temperature compensation circuit 4 and a control circuit 2 for controlling a voltage source 25 by a voltage detected by an output voltage detection resistor 24.
The temperature compensation circuit 4 includes an output voltage fluctuation width limiting resistor 21 and a thermistor 22 connected in series. Similarly, the power supply 3 has the same voltage source 3 as the power supply 2.
5, the output voltage detecting resistors 33 and 34, the temperature compensation circuit 5, and the control circuit 26. The temperature compensation circuit 5 includes an output voltage fluctuation width limiting resistor 31 and a thermistor 32 connected in series. It is composed. Note that the thermistors 22 and 32 have a negative temperature coefficient.
【００１０】次に、本実施例の動作について説明する。Next, the operation of this embodiment will be described.
【００１１】まず、電源３より電源２の方が出力電圧が
微小に高いとすると、主に電源２から負荷１へ電流が流
れ、電源３からはあまり流れない。すると電源２の発熱
が大きくなり、サーミスタ２２の抵抗値が減少し、出力
電圧は微小に低下し、電源３の出力電圧より低くなる。
すると今度は電源３より負荷１へ負荷電流が供給され、
電源２は負荷が軽くなる為、冷却される。First, assuming that the output voltage of the power supply 2 is slightly higher than that of the power supply 3, current mainly flows from the power supply 2 to the load 1, and does not flow much from the power supply 3. Then, the heat generation of the power supply 2 increases, the resistance value of the thermistor 22 decreases, the output voltage slightly decreases, and becomes lower than the output voltage of the power supply 3.
Then, the load current is supplied from the power supply 3 to the load 1 this time,
The power supply 2 is cooled because the load is reduced.
【００１２】これらの動作が操り返されて電源２と３と
の出力電流は均等になる。These operations are repeated to make the output currents of the power supplies 2 and 3 equal.
【００１３】[0013]
【発明の効果】以上説明したように本発明は、それぞれ
の出力端子に同一負荷を接続して電力を供給する第１の
電源装置と第２の電源装置とからなり、第１及び第２の
電源装置は、それぞれ負荷電流の増加に伴い発生する発
熱を検出する負の温度係数を有する温度検出素子を出力
電圧変動幅制限用抵抗と直列に接続してなる温度補償回
路を有し、出力端子に接続する出力電圧検出用分圧抵抗
に対して検出温度が上昇すると第１又は第２の電源装置
の出力電圧を微小に低下させる様に温度補償回路を接続
して出力電圧検出用分圧抵抗の出力電圧が上昇すると出
力電圧を低下させる帰還回路を有することにより、並列
運転を行う複数の電源の電力分担を均等にする事が可能
となるので、下記の効果がある。As described above, the present invention comprises a first power supply device and a second power supply device for supplying power by connecting the same load to each output terminal. Each power supply outputs a temperature detection element with a negative temperature coefficient that detects the heat generated by the increase in load current.
Temperature compensation circuit connected in series with a voltage fluctuation limiting resistor
First or second power supply device when the detected temperature rises with respect to the output voltage detecting voltage dividing resistor connected to the output terminal
Connect the temperature compensation circuit the output voltage so as to lower minutely
Output when the output voltage of the output voltage detecting resistor
The provision of the feedback circuit for lowering the force voltage makes it possible to equalize the power sharing of a plurality of power supplies that operate in parallel, and has the following effects.
【００１４】（１）負荷バランス用抵抗又は負荷ケーブ
ル抵抗を考慮せず、並列運転が出来る。(1) Parallel operation can be performed without considering the load balancing resistance or the load cable resistance.
【００１５】（２）負荷バランス用抵抗又は負荷ケーブ
ル抵抗を必要としない為、効率及び応答性が改善され
る。(2) Since no load balancing resistor or load cable resistor is required, efficiency and responsiveness are improved.
【図１】本発明の一実施例を示すブロック図である。FIG. 1 is a block diagram showing one embodiment of the present invention.
【図２】従来の並列運転用電源装置の一例を示すブロッ
ク図である。FIG. 2 is a block diagram showing an example of a conventional parallel operation power supply device.
１ 負荷 ２，２ａ，３，３ａ 電源装置 ４，５ 温度保償回路 ２１，３１ 出力電圧変動幅制限用抵抗 ２２，３２ サーミスタ ２３，２４，３３，３４ 出力電圧検出用抵抗 ２５，．３５ 電圧源（コンバータ） ２６，３６ 出力電圧制御回路 ２７，３７ バランス抵抗（負荷ケーブル等の抵抗分
も含む）1 Load 2, 2a, 3, 3a Power supply device 4, 5 Temperature compensation circuit 21, 31, Output voltage fluctuation width limiting resistor 22, 32 Thermistor 23, 24, 33, 34 Output voltage detecting resistor 25,. 35 Voltage source (converter) 26, 36 Output voltage control circuit 27, 37 Balance resistance (including resistance of load cable etc.)
フロントページの続き (56)参考文献 特開 昭50−119533（ＪＰ，Ａ) 特開 平４−285429（ＪＰ，Ａ) 実開 昭58−179531（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02J 1/10 H02J 1/00 306 Continuation of front page (56) References JP-A-50-119533 (JP, A) JP-A-4-285429 (JP, A) JP-A-58-179531 (JP, U) (58) Fields investigated (Int) .Cl. 7 , DB name) H02J 1/10 H02J 1/00 306
Claims (1)
て電力を供給する第１の電源装置と第２の電源装置とか
らなり、前記第１及び第２の電源装置は、それぞれ負荷
電流の増加に伴い発生する発熱を検出する負の温度係数
を有する温度検出素子を出力電圧変動幅制限用抵抗と直
列に接続してなる温度補償回路を有し、前記出力端子に
接続する出力電圧検出用分圧抵抗に対して検出温度が上
昇すると前記第１又は第２の電源装置の出力電圧を微小
に低下させる様に前記温度補償回路を接続して前記出力
電圧検出用分圧抵抗の出力電圧が上昇すると前記出力電
圧を低下させる帰還回路を有することを特徴とする並列
運転用電源装置。1. A first power supply device and a second power supply device for supplying electric power by connecting the same load to each output terminal, wherein the first and second power supply devices each have a load current. A temperature detecting element having a negative temperature coefficient for detecting the heat generated by the increase is directly connected to the output voltage fluctuation width limiting resistor.
A temperature compensating circuit connected to the column, and when the detected temperature rises with respect to the output voltage detecting voltage dividing resistor connected to the output terminal, the output voltage of the first or second power supply device slightly decreases said output connected to said temperature compensation circuit so as to
When the output voltage of the voltage detecting voltage dividing resistor rises, the output voltage is reduced.
A power supply device for parallel operation, comprising a feedback circuit for reducing pressure .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03166590A JP3089714B2 (en) | 1991-07-08 | 1991-07-08 | Power supply for parallel operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03166590A JP3089714B2 (en) | 1991-07-08 | 1991-07-08 | Power supply for parallel operation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0522862A JPH0522862A (en) | 1993-01-29 |
| JP3089714B2 true JP3089714B2 (en) | 2000-09-18 |
Family
ID=15834104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03166590A Expired - Fee Related JP3089714B2 (en) | 1991-07-08 | 1991-07-08 | Power supply for parallel operation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3089714B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999025052A1 (en) * | 1997-11-10 | 1999-05-20 | Mitsubishi Denki Kabushiki Kaisha | Service life controller for power unit |
| US6158561A (en) * | 1998-04-01 | 2000-12-12 | Toyoda Koki Kabushiki Kaisha | Clutch plate |
-
1991
- 1991-07-08 JP JP03166590A patent/JP3089714B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0522862A (en) | 1993-01-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20000620 |
|
| LAPS | Cancellation because of no payment of annual fees |