JPH0895650A - Power unit - Google Patents
Power unitInfo
- Publication number
- JPH0895650A JPH0895650A JP6235500A JP23550094A JPH0895650A JP H0895650 A JPH0895650 A JP H0895650A JP 6235500 A JP6235500 A JP 6235500A JP 23550094 A JP23550094 A JP 23550094A JP H0895650 A JPH0895650 A JP H0895650A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- current
- voltage
- bodies
- output
- 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
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Voltage And Current In General (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、複数台の電源本体を負
荷に並列接続して定電流制御を行なう電源装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for controlling a constant current by connecting a plurality of power supply main bodies in parallel with a load.
【0002】[0002]
【従来の技術】従来、複数台の電源本体を負荷に並列接
続して定電流制御を行なう方法として、例えば、特開昭
62−221872号公報に開示されるような、マスタ
ー・スレーブ方式によるものや、特開平6−10546
4号公報に開示されるような、予備用の電源本体を備え
た並列冗長運転によるものが知られている。図2は、既
存のマスター・スレーブ方式による電源装置の一例を示
したものであり、同図において、1は主電源本体,1
A,1Bは従電源本体であり、これらの主電源本体1お
よび従電源本体1A,1Bの各出力端子+V,−Vは、
共通の負荷4に並列接続される。主電源本体1と従電源
本体1A,1Bは同一の内部構成を有し、出力端子+
V,−Vからの各直流出力電圧Vout1,Vout
2,Vout3の電圧設定値を外部から可変する電圧可
変端子TRMと、並列運転用端子としてのマスター端子
Mおよびスレーブ端子Sが設けられる。そして、主電源
本体1のマスター端子Mに、従電源本体1A,1Bの各
スレーブ端子Sを接続することにより、従電源本体1
A,1Bは主電源本体1の内部基準電圧で並列運転され
る。2. Description of the Related Art Conventionally, as a method for controlling a constant current by connecting a plurality of power sources in parallel to a load, for example, a method of a master / slave system as disclosed in JP-A-62-221872. And JP-A-6-10546
There is known one using parallel redundant operation provided with a spare power source main body as disclosed in Japanese Patent No. FIG. 2 shows an example of an existing master / slave power supply device. In FIG. 2, 1 is a main power supply main unit, and 1 is a main power supply unit.
A and 1B are sub power source main bodies, and the output terminals + V and -V of the main power source main body 1 and the sub power source main bodies 1A and 1B are
It is connected in parallel to the common load 4. The main power supply main body 1 and the sub power supply main bodies 1A and 1B have the same internal configuration, and the output terminal +
DC output voltages Vout1, Vout from V, -V
2, a voltage variable terminal TRM for externally varying the voltage setting values of Vout3, a master terminal M and a slave terminal S as terminals for parallel operation are provided. Then, by connecting each slave terminal S of the slave power source bodies 1A and 1B to the master terminal M of the main power source body 1, the slave power source body 1
A and 1B are operated in parallel with the internal reference voltage of the main power supply body 1.
【0003】一方、主電源本体1および従電源本体1
A,1Bの各出力電圧ラインには、電流検出器たるシャ
ント抵抗5,5A,5Bが挿入接続される。この中で、
主電源本体1の出力電流I1を監視するシャント抵抗5
からの電流検出信号は、フィードバック制御回路6を構
成する誤差増幅器7によって基準電源8の基準電圧と比
較される。そして、この比較結果が、オペアンプ(図示
せず)などを内蔵する可変指令電圧出力回路9を介し
て、可変指令電圧として主電源本体1の電圧可変端子T
RMに印加される。また、従電源本体1A,1Bに対応
する各フィードバック制御回路6A,6Bでは、出力電
流I2,I3を監視するシャント抵抗5A,5Bからの
電流検出信号と、主電源本体1に対応する誤差増幅器7
の比較結果が誤差増幅器7A,7Bにより誤差増幅さ
れ、可変指令電圧出力回路9A,9Bを介して、従電源
本体1A,1Bの電圧可変端子TRMに可変指令電圧が
供給される。On the other hand, the main power source main body 1 and the sub power source main body 1
Shunt resistors 5, 5A and 5B as current detectors are inserted and connected to the output voltage lines of A and 1B, respectively. In this,
Shunt resistor 5 for monitoring the output current I1 of the main power supply body 1
The current detection signal from is compared with the reference voltage of the reference power source 8 by the error amplifier 7 which constitutes the feedback control circuit 6. Then, the comparison result is supplied as a variable command voltage to the voltage variable terminal T of the main power source body 1 via the variable command voltage output circuit 9 including an operational amplifier (not shown) or the like.
Applied to RM. In the feedback control circuits 6A and 6B corresponding to the sub power source bodies 1A and 1B, the current detection signals from the shunt resistors 5A and 5B for monitoring the output currents I2 and I3 and the error amplifier 7 corresponding to the main power source body 1 are detected.
The result of comparison is error-amplified by the error amplifiers 7A and 7B, and the variable command voltage is supplied to the voltage variable terminal TRM of the slave power supply bodies 1A and 1B via the variable command voltage output circuits 9A and 9B.
【0004】フィードバック制御回路6は、シャント抵
抗5を流れる出力電流I1が一定となるように、可変指
令電圧出力回路9からの可変指令電圧に応じて、主電源
本体1の出力電圧Vout1を可変制御する。また、主
電源本体1に従属する従電源本体1A,1B側のフィー
ドバック制御回路6A,6Bも、主電源本体1に設けら
れた誤差増幅器7の比較結果を基準として、各シャント
抵抗5A,5Bを流れる出力電流I2,I3が一定とな
るように、可変指令電圧出力回路9A,9Bからの可変
指令電圧に応じて、従電源本体1A,1Bの出力電圧V
out2,Vout3を可変制御する。この結果、各フ
ィードバック制御回路6,6A,6Bによって、各出力
電流I1,I2,I3を加えた負荷電流Iを一定にする
定電流制御が行なわれる。The feedback control circuit 6 variably controls the output voltage Vout1 of the main power supply main body 1 according to the variable command voltage from the variable command voltage output circuit 9 so that the output current I1 flowing through the shunt resistor 5 becomes constant. To do. The feedback control circuits 6A and 6B on the side of the main power supply bodies 1A and 1B, which are subordinate to the main power supply body 1, also use the shunt resistors 5A and 5B as a reference, based on the comparison result of the error amplifier 7 provided in the main power supply body 1. According to the variable command voltage from the variable command voltage output circuits 9A and 9B, the output voltage V of the slave power source bodies 1A and 1B is set so that the output currents I2 and I3 that flow are constant.
The out2 and Vout3 are variably controlled. As a result, the feedback control circuits 6, 6A, 6B carry out constant current control for making the load current I to which the output currents I1, I2, I3 are added constant.
【0005】次に、並列冗長運転の可能な電源装置の一
例を図3に示す。同図において、各電源本体11,11A,
11Bは各々同一構成をなすが、前記マスター端子Mおよ
びスレーブ端子Sに代わり、カレントシェアリング端子
PCが設けられている。各電源本体11,11A,11Bのカ
レントシェアリング端子PCは互いに接続されており、
これによって、各電源本体11,11A,11Bからの出力電
流I1,I2,I3が均等に分担される。また、負荷4
の負荷電流Iを監視するために、電流検出器たる単一の
シャント抵抗15が設けられている。シャント抵抗15から
の電流検出信号は、フィードバック制御回路16の誤差増
幅器17によって、基準電源18の基準電圧と比較され、こ
の比較結果が可変指令電圧出力回路19から可変指令電圧
として各電源本体11,11A,11Bの電圧可変端子TRM
に印加される。Next, an example of a power supply device capable of parallel redundant operation is shown in FIG. In the figure, each power supply body 11, 11A,
11B have the same configuration, but a current sharing terminal PC is provided instead of the master terminal M and the slave terminal S. The current sharing terminals PC of each power source body 11, 11A, 11B are connected to each other,
As a result, the output currents I1, I2, I3 from the power supply bodies 11, 11A, 11B are equally shared. Also, load 4
A single shunt resistor 15, which is a current detector, is provided to monitor the load current I of the. The current detection signal from the shunt resistor 15 is compared with the reference voltage of the reference power supply 18 by the error amplifier 17 of the feedback control circuit 16, and the comparison result is output from the variable command voltage output circuit 19 as a variable command voltage to each power supply body 11, 11A, 11B voltage variable terminal TRM
Is applied to
【0006】上記構成では、シャント抵抗15を流れる負
荷電流Iが一定となるように、各電源本体11,11A,11
Bからの出力電圧Vout1,Vout2,Vout3
が可変制御される。また、図2に示すマスター・スレー
ブ方式とは異なり、各電源本体11,11A,11Bは、それ
ぞれ独立した内部基準電圧で並列運転されるため、ある
1台の電源本体11が故障しても、カレントシェアリング
端子PCどうしの接続により、出力電流I2,I3のバ
ランスを取りつつ、残りのN台の電源本体11A,11Bに
よる並列運転が継続される。In the above structure, the power supply bodies 11, 11A, 11 are so arranged that the load current I flowing through the shunt resistor 15 becomes constant.
Output voltage Vout1, Vout2, Vout3 from B
Is variably controlled. Further, unlike the master-slave system shown in FIG. 2, since each power supply main body 11, 11A, 11B is operated in parallel with an independent internal reference voltage, even if one power supply main body 11 fails, By connecting the current sharing terminals PC to each other, the parallel operation by the remaining N power supply bodies 11A and 11B is continued while balancing the output currents I2 and I3.
【0007】[0007]
【発明が解決しようとする課題】上記従来技術におい
て、図2に示すマスター・スレーブ方式の電源装置で
は、主電源本体1が何等かの原因で故障を起こすと、こ
れに従属する従電源本体2,3も一緒にシステムダウン
してしまい、負荷4に対して正常の電力供給を続行する
ことができなくなる欠点が有る。これに対して、図3に
示す並列冗長運転の場合には、ある電源本体11,11A,
11Bが故障しても、電源装置全体がシステムダウンする
ことはない。しかし、シャント抵抗15は負荷電流Iを直
接検出するため、それ自体大きく高価なものが必要とな
り、しかも、電源装置の容量を上げるために、別の電源
本体11Cを付加しようとすると、シャント抵抗15も同時
に再設計しなければならず、装置全体のシステム構築を
各電源本体11,11A,11B毎にユニット化して行ないに
くいという欠点が有る。In the above-mentioned prior art, in the master-slave type power supply device shown in FIG. 2, when the main power supply main body 1 fails for some reason, the sub-power supply main body 2 subordinate to the main power supply main body 1 fails. , 3 also goes down the system together, and there is a drawback that normal power supply to the load 4 cannot be continued. On the other hand, in the case of parallel redundant operation shown in FIG. 3, certain power supply main bodies 11, 11A,
Even if 11B fails, the entire power supply does not go down. However, since the shunt resistor 15 directly detects the load current I, a large and expensive shunt resistor itself is required. Moreover, in order to increase the capacity of the power supply device, if another power supply body 11C is added, the shunt resistor 15 will be added. Has to be redesigned at the same time, and there is a drawback that it is difficult to construct the system of the entire device as a unit for each power source main body 11, 11A, 11B.
【0008】そこで、本発明は上記問題点に鑑み、並列
冗長運転による定電流制御が可能で、しかも、装置全体
のシステム構築を各電源本体毎に簡単に行なうことの可
能な電源装置を提供することを目的とする。In view of the above problems, the present invention provides a power supply device capable of constant current control by parallel redundant operation and capable of easily constructing a system for the entire device for each power supply body. The purpose is to
【0009】[0009]
【課題を解決するための手段】本発明の電源装置は、出
力電圧を可変する電圧可変端子を備えた複数台の電源本
体を負荷に並列接続するとともに、負荷電流を監視する
ための電流検出器を接続し、前記電流検出器からの電流
検出信号に基づいて前記負荷電流が一定となるように前
記各電源本体の電圧可変端子に可変指令電圧を供給する
フィードバック制御回路を備えた電源装置において、前
記各電源本体の出力電圧ラインに前記電流検出器を各々
接続し、この電流検出器からの各電流検出信号を加算し
て共通の前記可変指令電圧を供給する加算回路を前記フ
ィードバック制御回路に備えたものである。SUMMARY OF THE INVENTION A power supply device of the present invention is a current detector for monitoring a load current while connecting a plurality of power supply main bodies each having a voltage variable terminal for varying an output voltage to a load in parallel. In a power supply device including a feedback control circuit that supplies a variable command voltage to the voltage variable terminal of each power supply main body so that the load current becomes constant based on the current detection signal from the current detector, The feedback control circuit is provided with an adder circuit that connects the current detectors to the output voltage lines of the power supplies and adds the current detection signals from the current detectors to supply the common variable command voltage. It is a thing.
【0010】[0010]
【作用】上記構成により、各電流検出器からの電流検出
信号を加算回路により加算して、電源本体の各電圧可変
端子に共通の可変指令電圧を供給することで、複数台の
電源本体による並列冗長運転を行ないつつ、各出力電圧
を同時に可変させながら、負荷電流を一定に保つ制御が
行なわれる。この場合、電流検出器は各電源本体毎に設
けられており、大きく高価な電流検出器は不要である。
また、既存の装置に別の電源本体を付加する際にも、こ
の電源本体の出力電流に見合う電流検出器を挿入接続す
るだけでよく、他の電流検出器を再設計する必要もな
い。With the above configuration, the current detection signals from the respective current detectors are added by the adder circuit, and a common variable command voltage is supplied to each voltage variable terminal of the power supply main body, so that a plurality of power supply main bodies operate in parallel. Control is performed to keep the load current constant while simultaneously varying each output voltage while performing redundant operation. In this case, the current detector is provided for each power supply main body, and a large and expensive current detector is unnecessary.
Further, when adding another power supply main body to the existing device, it suffices to insert and connect a current detector corresponding to the output current of the power supply main body, and it is not necessary to redesign another current detector.
【0011】[0011]
【実施例】以下、本発明の一実施例につき、電源装置全
体の回路構成を示す図1を参照して説明する。なお、こ
の図1において、前記従来例と同一部分には同一符号を
付し、その共通する部分の詳細なる説明は省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 1 showing the circuit configuration of the entire power supply device. In FIG. 1, the same parts as those in the conventional example are designated by the same reference numerals, and detailed description of the common parts will be omitted.
【0012】同図において、各電源本体11,11A,11B
は前記図3と同様に同一の構成をなし、N+1台の電源
本体11,11A,11Bによる並列冗長運転を行なうため
に、カレントシェアリング端子PCどうしが接続され
る。また、電流検出器たるシャント抵抗15,15A,15B
が、各電源本体11,11A,11Bの出力電圧ラインの一方
に各々挿入接続される。一方、フィードバック制御回路
16には、各シャント抵抗15,15A,15Bからの電流検出
信号を加算して、各電源本体11,11A,11Bの電圧可変
端子TRMに共通する可変指令電圧を供給する加算回路
21が設けられる。この加算回路21は、誤差増幅器たる加
算器22の反転入力端子に、各シャント抵抗15,15A,15
Bからの電流検出信号を増幅するバッファ23,23A,23
Bと、入力抵抗24,24A,24Bとの直列回路を各々並列
接続し、この加算器22の非反転入力端子に可変可能な基
準電源25を接続するとともに、加算器22の反転入力端子
と出力端子との間に帰還抵抗26を接続して構成される。In the figure, each power source body 11, 11A, 11B
Has the same configuration as in FIG. 3, and the current sharing terminals PC are connected to each other in order to perform the parallel redundant operation by the N + 1 power supply main bodies 11, 11A and 11B. In addition, shunt resistors 15, 15A, 15B that are current detectors
, Respectively, are inserted and connected to one of the output voltage lines of the power supply bodies 11, 11A and 11B. Meanwhile, the feedback control circuit
An adder circuit for adding the current detection signals from the respective shunt resistors 15, 15A, 15B to the 16 to supply a variable command voltage common to the voltage variable terminals TRM of the respective power source bodies 11, 11A, 11B.
21 is provided. This adder circuit 21 has shunt resistors 15, 15A, 15 at the inverting input terminals of an adder 22 which is an error amplifier.
Buffers 23, 23A, 23 for amplifying the current detection signal from B
B and the input resistors 24, 24A, 24B are connected in parallel to each other in parallel, the variable reference power source 25 is connected to the non-inverting input terminal of the adder 22, and the inverting input terminal and the output of the adder 22 are connected. It is configured by connecting a feedback resistor 26 between the terminal and the terminal.
【0013】次に、上記構成に付きその作用を説明する
と、本実施例では、負荷4を流れる負荷電流Iの監視
が、電源本体11,11A,11B毎に設けられた各シャント
抵抗15,15A,15Bによって行なわれる。すなわち、シ
ャント抵抗15,15A,15Bは、各電源本体11,11A,11
Bからの出力電流I1,I2,I3を個々に監視し、こ
れらの出力電流I1,I2,I3に対応した電流検出信
号が加算回路21に出力される。加算回路21は、各電流検
出信号を加算した結果を、共通の可変指令電圧として各
電源本体11,11A,11Bの電圧可変端子TRMに供給す
る。これにより、各電源本体11,11A,11Bの出力電圧
Vout1,Vout2,Vout3は、フィードバッ
ク制御回路16からの可変指令電圧に基づいて、各々の出
力電流I1,I2,I3が一定となるように可変制御さ
れる。Next, the operation of the above structure will be described. In this embodiment, the load current I flowing through the load 4 is monitored by the shunt resistors 15, 15A provided for each of the power source bodies 11, 11A, 11B. , 15B. That is, the shunt resistors 15, 15A, 15B are connected to the respective power source bodies 11, 11A, 11
The output currents I1, I2, I3 from B are individually monitored, and current detection signals corresponding to these output currents I1, I2, I3 are output to the adder circuit 21. The adder circuit 21 supplies the result of adding the respective current detection signals to the voltage variable terminal TRM of each power source main body 11, 11A, 11B as a common variable command voltage. As a result, the output voltages Vout1, Vout2, Vout3 of the respective power supply bodies 11, 11A, 11B are varied based on the variable command voltage from the feedback control circuit 16 so that the respective output currents I1, I2, I3 become constant. Controlled.
【0014】また、各電源本体11,11A,11Bは、それ
ぞれ独立した内部基準電圧を有しており、仮に電源本体
11が故障しても、カレントシェアリング端子PCどうし
を接続することにより、残りのN台の電源本体11A,11
Bは互いに出力電流I2,I3のバランスを取りつつ、
並列運転を継続する。Further, each power source main body 11, 11A, 11B has an independent internal reference voltage.
Even if 11 fails, by connecting the current sharing terminals PC to each other, the remaining N power supply units 11A, 11
B balances the output currents I2 and I3 with each other,
Continue parallel operation.
【0015】本実施例における電源装置は、複数台の電
源本体11,11A,11Bに対して、個々にシャント抵抗1
5,15A,15Bを接続し、これらのシャント抵抗15,15
A,15Bから出力される電流検出信号を加算回路21によ
り加算して、各電源本体11,11A,11Bの電圧可変端子
TRMに共通の可変指令電圧として供給することで、電
源本体11,11A,11Bによる並列冗長運転を行ないつ
つ、各出力電圧Vout1,Vout2,Vout3を
同時に可変させながら、負荷電流Iを一定に保つ制御を
行なっている。この場合、シャント抵抗15,15A,15B
は各電源本体11,11A,11B毎に分散して設けられてい
るため、従来のような大きく高価なシャント抵抗は不要
である。しかも、既存の装置に別の電源本体11Cを付加
する際にも、この電源本体11Cの出力電流に見合うシャ
ント抵抗などの電流検出器を、電源本体11Cの出力電圧
ラインに挿入接続するだけでよく、すでに接続されてい
るシャント抵抗15,15A,15Bをいちいち再設計する必
要もない。つまり、各電源本体11,11A,11Bに対応し
て、シャント抵抗15,15A,15Bや入力抵抗24,24A,
24Bなどを個別にユニット化して設計し、これらを負荷
4の容量などに応じて適宜組み合わせれば、簡単に装置
全体のシステム構築を行なうことができる。The power supply device according to this embodiment has a plurality of power supply bodies 11, 11A and 11B, each of which has a shunt resistor 1
Connect 5,15A, 15B, and connect these shunt resistors 15,15
The current detection signals output from A and 15B are added by the adder circuit 21 and are supplied as a common variable command voltage to the voltage variable terminals TRM of the respective power supply main bodies 11, 11A and 11B. While performing parallel redundant operation by 11B, the output currents Vout1, Vout2, and Vout3 are simultaneously varied, and the load current I is kept constant. In this case, shunt resistors 15, 15A, 15B
Are distributed for each power source main body 11, 11A, 11B, so that a large and expensive shunt resistor as in the prior art is unnecessary. Moreover, when adding another power supply unit 11C to the existing device, a current detector such as a shunt resistor matching the output current of the power supply unit 11C can be simply inserted and connected to the output voltage line of the power supply unit 11C. , It is not necessary to redesign the already connected shunt resistors 15, 15A and 15B. That is, the shunt resistors 15, 15A, 15B and the input resistors 24, 24A, corresponding to the power supply bodies 11, 11A, 11B,
If the 24B and the like are individually designed as a unit and are appropriately combined according to the capacity of the load 4 or the like, the system construction of the entire apparatus can be easily performed.
【0016】このように、出力電圧Vout1,Vou
t2,Vout3を可変する電圧可変端子TRMを備え
た複数台の電源本体11,11A,11Bを負荷4に並列接続
するとともに、負荷電流Iを監視するためのシャント抵
抗15,15A,15Bを接続し、シャント抵抗15,15A,15
Bからの電流検出信号に基づいて負荷電流Iが一定とな
るように各電源本体11,11A,11Bの電圧可変端子TR
Mに可変指令電圧を供給するフィードバック制御回路16
を備えた電源装置において、各電源本体11,11A,11B
の出力電圧ラインに前記シャント抵抗15,15A,15Bを
各々接続し、このシャント抵抗15,15A,15Bからの各
電流検出信号を加算して共通の前記可変指令電圧を供給
する加算回路21をフィードバック制御回路16に備えたも
のであるから、並列冗長運転による定電流制御が可能
で、しかも、装置全体のシステム構築を各電源本体11,
11A,11B毎に簡単に行なうことのできる電源装置が得
られる。In this way, the output voltages Vout1 and Vou are
A plurality of power supply bodies 11, 11A, 11B equipped with voltage variable terminals TRM for varying t2 and Vout3 are connected in parallel to the load 4, and shunt resistors 15, 15A, 15B for monitoring the load current I are connected. , Shunt resistor 15, 15A, 15
The voltage variable terminal TR of each power source body 11, 11A, 11B so that the load current I becomes constant based on the current detection signal from B.
Feedback control circuit 16 for supplying variable command voltage to M
In a power supply device equipped with, each power supply body 11, 11A, 11B
The shunt resistors 15, 15A and 15B are respectively connected to the output voltage line of and the current detection signals from the shunt resistors 15, 15A and 15B are added to feed back the adder circuit 21 which supplies the common variable command voltage. Since it is provided in the control circuit 16, constant current control by parallel redundant operation is possible, and furthermore, the system construction of the entire device can be achieved by each power supply body 11,
It is possible to obtain a power supply device that can be easily operated for each of 11A and 11B.
【0017】さらに、本実施例の加算回路21は、各シャ
ント抵抗15,15A,15B毎に並列接続される入力抵抗2
4,24A,24Bと帰還抵抗26とを、演算増幅器たる加算
器22に接続した構成となっているため、仮に複数台の電
源本体11を付加した場合に、各シャント抵抗15,15A,
15Bからの電流検出信号の加算値が加算器22の出力飽和
電圧以上に達したとしても、帰還抵抗26の定数を変える
だけで、加算回路21からの出力を飽和させずに、簡単に
定電流制御を行なうことが可能となる。この場合、N台
の電源本体11,11A,11B…に対して、同じ抵抗値Rの
入力抵抗24,24A,24Bを接続し、かつ、帰還抵抗26の
抵抗値をR/Nに設定すれば、常に各電流検出信号の平
均値が、加算回路21の出力として可変指令電圧出力回路
19から各電源本体11,11A,11B…の電圧可変端子TR
Mに供給され、装置全体のシステム構築が一層容易にな
る。Further, the adder circuit 21 of the present embodiment has an input resistor 2 connected in parallel for each shunt resistor 15, 15A, 15B.
Since 4, 24A, 24B and the feedback resistor 26 are connected to the adder 22 which is an operational amplifier, if a plurality of power supply bodies 11 are added, each shunt resistor 15, 15A,
Even if the added value of the current detection signal from 15B reaches the output saturation voltage of the adder 22 or more, simply changing the constant of the feedback resistor 26 does not saturate the output from the adder circuit 21 and the constant current can be easily adjusted. It becomes possible to control. In this case, if the input resistances 24, 24A, 24B having the same resistance value R are connected to the N power supply bodies 11, 11A, 11B ... And the resistance value of the feedback resistance 26 is set to R / N. , The average value of each current detection signal is always the variable command voltage output circuit as the output of the adding circuit 21.
From 19 to the voltage variable terminal TR of each power supply body 11, 11A, 11B ...
It is supplied to M, and the system construction of the entire device becomes easier.
【0018】なお、本発明は上記実施例に限定されるも
のではなく、本発明の要旨の範囲において種々の変形実
施が可能である。例えば、電流検出器として、実施例中
におけるシャント抵抗に代わり、カレントトランスなど
を用いることも可能である。The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, as the current detector, a current transformer or the like can be used instead of the shunt resistor in the embodiment.
【0019】[0019]
【発明の効果】本発明は、出力電圧を可変する電圧可変
端子を備えた複数台の電源本体を負荷に並列接続すると
ともに、負荷電流を監視するための電流検出器を接続
し、前記電流検出器からの電流検出信号に基づいて前記
負荷電流が一定となるように前記各電源本体の電圧可変
端子に可変指令電圧を供給するフィードバック制御回路
を備えた電源装置において、前記各電源本体の出力電圧
ラインに前記電流検出器を各々接続し、この電流検出器
からの各電流検出信号を加算して共通の前記可変指令電
圧を供給する加算回路を前記フィードバック制御回路に
備えたものであり、並列冗長運転による定電流制御が可
能で、しかも、装置全体のシステム構築を各電源本体毎
に簡単に行なうことの可能な電源装置を提供できる。According to the present invention, a plurality of power supply bodies having voltage variable terminals for varying the output voltage are connected in parallel to a load, and a current detector for monitoring the load current is connected to the current detector. In a power supply device including a feedback control circuit that supplies a variable command voltage to a voltage variable terminal of each power supply main body so that the load current becomes constant based on a current detection signal from a power supply unit, an output voltage of each power supply main body The feedback control circuit is provided with an adder circuit that connects the current detectors to a line and adds the respective current detection signals from the current detectors to supply the common variable command voltage. It is possible to provide a power supply device capable of constant current control by operation and capable of easily constructing a system of the entire device for each power supply main body.
【図1】本発明の一実施例を示す電源装置の回路構成図
である。FIG. 1 is a circuit configuration diagram of a power supply device showing an embodiment of the present invention.
【図2】従来例を示すマスター・スレーブ方式における
電源装置の回路構成図である。FIG. 2 is a circuit configuration diagram of a power supply device in a master / slave system showing a conventional example.
【図3】従来例を示す並列冗長運転時における電源装置
の回路構成図である。FIG. 3 is a circuit configuration diagram of a power supply device during parallel redundant operation showing a conventional example.
4 負荷 11,11A,11B 電源本体 15,15A,15B シャント抵抗(電流検出器) 16 フィードバック制御回路 21 加算回路 TRM 電圧可変端子 4 Load 11, 11A, 11B Power supply main unit 15, 15A, 15B Shunt resistance (current detector) 16 Feedback control circuit 21 Adder circuit TRM Voltage variable terminal
Claims (1)
た複数台の電源本体を負荷に並列接続するとともに、負
荷電流を監視するための電流検出器を接続し、前記電流
検出器からの電流検出信号に基づいて前記負荷電流が一
定となるように前記各電源本体の電圧可変端子に可変指
令電圧を供給するフィードバック制御回路を備えた電源
装置において、前記各電源本体の出力電圧ラインに前記
電流検出器を各々接続し、この電流検出器からの各電流
検出信号を加算して共通の前記可変指令電圧を供給する
加算回路を前記フィードバック制御回路に備えたことを
特徴とする電源装置。1. A plurality of power supply main bodies each having a voltage variable terminal for varying an output voltage are connected in parallel to a load, and a current detector for monitoring a load current is connected to the load, and a current from the current detector is connected. In a power supply device including a feedback control circuit that supplies a variable command voltage to a voltage variable terminal of each power supply main body so that the load current becomes constant based on a detection signal, the current is supplied to an output voltage line of each power supply main body. A power supply device characterized in that the feedback control circuit is provided with an adder circuit to which each of the detectors is connected and each current detection signal from the current detector is added to supply a common variable command voltage.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6235500A JPH0895650A (en) | 1994-09-29 | 1994-09-29 | Power unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6235500A JPH0895650A (en) | 1994-09-29 | 1994-09-29 | Power unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0895650A true JPH0895650A (en) | 1996-04-12 |
Family
ID=16986950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6235500A Pending JPH0895650A (en) | 1994-09-29 | 1994-09-29 | Power unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0895650A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003023737A (en) * | 2001-07-06 | 2003-01-24 | Toshiba Corp | Uninterruptible power supply system |
JP2020194232A (en) * | 2019-05-24 | 2020-12-03 | 株式会社日立製作所 | Redundant constant current source and sensor system |
-
1994
- 1994-09-29 JP JP6235500A patent/JPH0895650A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003023737A (en) * | 2001-07-06 | 2003-01-24 | Toshiba Corp | Uninterruptible power supply system |
JP4497760B2 (en) * | 2001-07-06 | 2010-07-07 | 株式会社東芝 | Uninterruptible power supply system |
JP2020194232A (en) * | 2019-05-24 | 2020-12-03 | 株式会社日立製作所 | Redundant constant current source and sensor system |
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