JPH03178526A - Parallel redundant operation system of power unit - Google Patents
Parallel redundant operation system of power unitInfo
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- JPH03178526A JPH03178526A JP1316229A JP31622989A JPH03178526A JP H03178526 A JPH03178526 A JP H03178526A JP 1316229 A JP1316229 A JP 1316229A JP 31622989 A JP31622989 A JP 31622989A JP H03178526 A JPH03178526 A JP H03178526A
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Abstract
Description
【発明の詳細な説明】
〔目次〕
牟既要
産業上の利用分野
従来の技術（第３図）
発明が解決しようとする課題
課題を解決するための手段（第１
作用
実施例
（ａ） 一実施例の説明（第２図）
（ｂ） 他の実施例の説明
発明の効果
図）
〔概要〕
負荷に対し複数の電源ユニットを並列に接続し、電流バ
ランスをとりながら並列冗長運転する電源ユニットの並
列冗長運転方式に関し、
電流バランス機能を付加しても冗長機能が失われないよ
うにすることを目的とし、
出力電圧を一定電圧に制御するための電圧制御部と、出
力電圧を検出し、所定の電圧と比較し、制御電圧を該電
圧制御部に出力する第１の電圧比較部と、該第１の電圧
比較部の出力電圧検出点に接続され、出力電流に比例し
た電圧を発生する電圧源とを有する電源ユニットを負荷
に対し複数並列に接続し、各電源ユニットの該電圧源を
電流バランス端子を通して互いに接続してなる電源ユニ
ットの並列冗長運転方式において、各電源ユニットに、
該出力電圧を検出し、所定の電圧と比較し、制御電圧を
該電圧制御部に出力する第２の電圧比較部を設けた。[Detailed description of the invention] [Table of contents] Existing industrial fields of application Prior art (Fig. 3) Means for solving the problem to be solved by the invention (1st working example (a) 1 Description of Embodiments (Figure 2) (b) Explanation of other embodiments Diagram of effects of the invention) [Summary] A power supply unit that connects a plurality of power supply units in parallel to a load and performs parallel redundant operation while maintaining current balance. Regarding the parallel redundant operation method of A first voltage comparison section that compares a predetermined voltage and outputs a control voltage to the voltage control section; and a first voltage comparison section that is connected to an output voltage detection point of the first voltage comparison section and generates a voltage proportional to the output current. In a parallel redundant operation method of a power supply unit, in which a plurality of power supply units having a voltage source are connected in parallel to a load, and the voltage sources of each power supply unit are connected to each other through a current balance terminal, each power supply unit has a
A second voltage comparison section was provided to detect the output voltage, compare it with a predetermined voltage, and output a control voltage to the voltage control section.
本発明は、負荷に対し複数の電源ユニットを並列接続し
、電流バランスをとりながら並列冗長運転する電源ユニ
ットの並列冗長運転方式に関する。The present invention relates to a parallel redundant operation method for power supply units in which a plurality of power supply units are connected in parallel to a load and are operated in parallel redundantly while maintaining current balance.
情報処理装置等の電子機器において、処理の増大によっ
て大容量及び高信頼性を目的とした電源ユニットの並列
冗長運転が増加している。2. Description of the Related Art In electronic devices such as information processing devices, parallel redundant operation of power supply units for the purpose of large capacity and high reliability is increasing due to an increase in processing.
並列冗長運転とは、例えば１００Ａの負荷に対し５０Ａ
の電源ユニットを三台並列に接続し、−台がダウンした
場合でも残る二台で１０ＯＡの負荷電流を賄うものであ
る。Parallel redundant operation means, for example, 50A for a 100A load.
Three power supply units are connected in parallel, and even if the - unit goes down, the remaining two units can cover the load current of 10OA.
このような並列冗長運転では、更に信頼度の向上を目的
に各電源ユニットの出力電流をバランスさせる並列冗長
・電流バランス運転が望まれている。In such parallel redundant operation, parallel redundant/current balance operation is desired in which the output currents of each power supply unit are balanced for the purpose of further improving reliability.
第３図は従来技術の説明図である。 FIG. 3 is an explanatory diagram of the prior art.
負荷Ｒに対し、２つの電源ユニッ）ＰＷＲ１、ＰＷＲ２
が接続されている。For load R, two power supply units) PWR1, PWR2
is connected.
各電源ユニソ）ＰＷＲ１、ＰＷＲ２は、出力電圧Ｖｏ１
、ＶＯ２を一定電圧に制？ＩＩｌする電圧制御部１と、
出力電圧を検出し、所定電圧ｖＯと比較して電圧制御部
１に制御電圧を出力する第１の電圧比較部２とを有して
いる。Each power supply unit) PWR1, PWR2 is the output voltage Vo1
, control VO2 to a constant voltage? IIl voltage control section 1;
It has a first voltage comparison section 2 that detects the output voltage, compares it with a predetermined voltage vO, and outputs a control voltage to the voltage control section 1.
電圧制御部１は、トランスＴｒの一次側に接続されたト
ランジスタＱと、トランスＴｒの二次側に設けられたダ
イオードＤ１、Ｄ２の整流回路と、コイルＬｌ、コンデ
ンサＣＩの平滑回路とを有し、第１の電圧比較部２の制
御電圧をパルス幅変調回路ＰＷＭでパルス幅変調し、ト
ランジスタＱを駆動することで出力電圧を安定化する。The voltage control unit 1 includes a transistor Q connected to the primary side of the transformer Tr, a rectifier circuit including diodes D1 and D2 provided on the secondary side of the transformer Tr, and a smoothing circuit including a coil Ll and a capacitor CI. , the control voltage of the first voltage comparator 2 is pulse width modulated by a pulse width modulation circuit PWM, and the output voltage is stabilized by driving the transistor Q.
一方、第１の電圧比較部２は、直列抵抗ｒ１、ｒ２、ｒ
３によって出力電圧ｖｏｌ、Ｖｏｗを分圧し、分圧電圧
Ｖｓｌ、Ｖｓ２と所定電圧Ｖｏを比較アンプＡＭＰＩで
比較して制御電圧を出力する。On the other hand, the first voltage comparator 2 includes series resistors r1, r2, r
The output voltages vol and Vow are divided by 3, and the divided voltages Vsl and Vs2 are compared with a predetermined voltage Vo by a comparator amplifier AMPI to output a control voltage.
このような２台の電源ユニットＰＷＲ１、ＰＷＲ２の出
力電流をバランスするために、各電源ユニットＰＷＲ１
、ＰＷＲ２に、第１の電圧比較部２の出力電圧検出点（
抵抗ｒ２とｒ３の接続点）に接続され、出力電流に比例
した電圧Ｖｉ＋、Ｖｉ２を発生する電圧源３が設けられ
、各電源ユニットＰＷＲ１、ＰＷＲ２の電圧１１１１Ｘ
３が電流バランス端子ＣＢ１、ＣＢ２を通して互いに接
続している。In order to balance the output currents of these two power supply units PWR1 and PWR2, each power supply unit PWR1
, PWR2 is connected to the output voltage detection point (
A voltage source 3 that generates voltages Vi+ and Vi2 proportional to the output current is connected to the connection point of resistors r2 and r3), and generates voltages Vi+ and Vi2 proportional to the output current, and the voltage 1111X of each power supply unit PWR1 and PWR2
3 are connected to each other through current balance terminals CB1 and CB2.
電圧源３は、電圧制御部１のトランスＴｒの一次側の電
流を変流器Ｔｃで検出し、ダイオードＤ３、抵抗ｒ４、
コンデンサＣ２によって電圧Ｖｉ１、Ｖｉ２に変換する
。The voltage source 3 detects the current on the primary side of the transformer Tr of the voltage control unit 1 with a current transformer Tc, and includes a diode D3, a resistor r4,
It is converted into voltages Vi1 and Vi2 by capacitor C2.
この電流バランス動作は、次のようである。This current balance operation is as follows.
２台の電源ユニットＰＷＲ１、ＰＷＲ２の出力電圧ＶＯ
ｘ、Ｖｏ２が、Ｖｏ １ ＝Ｖｏ ２と等しく電流がバ
ランスしている時は、各電圧源３の電圧Ｖｉｒ、■１２
は、■１１＝Ｖｉ２であり、電流バランス端子ＣＢ１、
ＣＢ２間に流れる電流Ｉｔは０であり、２台の電源ユニ
ットＰＷＲ１、ＰＷＲ２は電流バランス端子ＣＢ１、Ｃ
Ｂ２を接続していない時と同じ動作を行う。Output voltage VO of two power supply units PWR1 and PWR2
When x, Vo2 are equal to Vo 1 = Vo 2 and the current is balanced, the voltage Vir of each voltage source 3, ■12
is ■11=Vi2, and the current balance terminal CB1,
The current It flowing between CB2 is 0, and the two power supply units PWR1 and PWR2 have current balance terminals CB1 and C
Perform the same operation as when B2 is not connected.
次に、出力電圧Ｖｏ！、Ｖｏ２がＶｏ １＞Ｖ。Next, the output voltage Vo! , Vo2 is Vo1>V.
シの時は、出力電流１ｏ１、ｌｏｔがｌｏｔ＞１０２と
なるから、電圧源３の電圧Ｖｉ１．Ｖｉ２はＶｉｌ＞Ｖ
ｉ２となって、電源ユニットＰＷＲ■の電圧源３から電
圧比較部２の抵抗ｒ３、電源ユニットＰＷＲ２の電圧比
較部２の抵抗ｒ３、電源ユニソ）ＰＷＲ２の電圧源３の
順で電流が流れ、これによって電流バランス端子ＣＢ２
から電流バランス端子ＣＢＩに向かって電流Ｉｔが流れ
る。When the output current is 1o1 and lot is lot>102, the voltage Vi1 of the voltage source 3 is. Vi2 is Vil>V
i2, a current flows in this order from the voltage source 3 of the power supply unit PWR■ to the resistor r3 of the voltage comparator 2, the resistor r3 of the voltage comparator 2 of the power supply unit PWR2, and the voltage source 3 of the power supply unit PWR2. By current balance terminal CB2
A current It flows from the terminal toward the current balance terminal CBI.
これによって、電源ユニットＰＷＲ１の電圧比較部２の
抵抗ｒ３の電圧ＶＲ１は上昇し、逆に電源ユニットＰＷ
Ｒ２の電圧比較部２の抵抗ｒ３の電圧Ｖｌ１２は低下す
ることになる。As a result, the voltage VR1 of the resistor r3 of the voltage comparison section 2 of the power supply unit PWR1 increases, and conversely, the voltage VR1 of the resistor r3 of the voltage comparison section 2 of the power supply unit PWR1 increases.
The voltage Vl12 of the resistor r3 of the voltage comparator 2 of R2 will decrease.
このため、電源ユニットＰＷＲ１の電圧比較部２の検出
電圧ＶＳＩは上昇し、電源ユニソ）ＰＷＲｌは出力電圧
ＶＯＩを下げる方向に、電源ユニッ）ＰＷＲ２の電圧比
較部２の検出電圧Ｖｓ２は下降し、電源ユニソ）ＰＷＲ
２は出力電圧Ｖｏ２を上げる方向に制御が働く。Therefore, the detection voltage VSI of the voltage comparison section 2 of the power supply unit PWR1 increases, and the detection voltage Vs2 of the voltage comparison section 2 of the power supply unit PWR2 decreases, decreasing the output voltage VOI of the power supply unit PWR1. Uniso) PWR
2, control works in the direction of increasing the output voltage Vo2.
その結果、各電源ユニソ）ＰＷＲ１、ＰＷＲ２の出力電
流１０１、■ｏ２はｌ０１＝Ｉ０２となるように出力電
圧が制御される。As a result, the output voltages of the output currents 101 and 2o2 of the power supplies UNISO) PWR1 and PWR2 are controlled so that 101=I02.
又、出力電圧■０１、ＶＯ２が、Ｖｏ Ｉ＜Ｖ。Also, the output voltage ■01, VO2 is Vo I<V.
２の時は逆の動作となる。At the time of 2, the operation is the opposite.
このようにして、容易に出力電流のバランスがとれた並
列運転が実現できる。In this way, parallel operation with well-balanced output currents can be easily achieved.
しかしながら、従来技術では、動作中に電源ユニットの
一台がダウンした場合に不具合が生じる。However, in the conventional technology, a problem occurs when one of the power supply units goes down during operation.
例えば、電源ユニットＰＷＲ２がダウンしたとすると、
電源ユニットＰＷＲ２の出力電流１０２＝０１電源ユニ
ツトＰＷＲ１の出力電流１ｏＩ＝１、ｌとなり、電源ユ
ニットＰＷＲ２の電圧源３の電圧Ｖｉａ＝０、電源ユニ
ソ）ＰＷＲＩの電圧源３の電圧Ｖｉ１は正常時の倍の出
力となる。For example, if power supply unit PWR2 goes down,
The output current of the power supply unit PWR2 is 102 = 01, the output current of the power supply unit PWR1 is 1oI = 1, l, the voltage Via of the voltage source 3 of the power supply unit PWR2 is 0, the voltage Vi1 of the voltage source 3 of the power supply unit PWRI is normal. The output will be doubled.
従って、電流バランス端子ＣＢ２からＣＢＩへ向かって
大きな電流Ｉｔが流れ、電源ユニットＰＷＲＩの電圧比
較部２の検出電圧ＶＳＩは上昇し、電源ユニソ）ＰＷＲ
Ｉの出力電圧ＶｏＩは大幅に低下する。Therefore, a large current It flows from the current balance terminal CB2 toward CBI, and the detected voltage VSI of the voltage comparator 2 of the power supply unit PWRI increases, and the power supply unit PWR
The output voltage VoI of I drops significantly.
このため、従来技術では電流バランス機能を付加したこ
とによって冗長の機能を失うことになるという問題が生
じた。For this reason, in the prior art, a problem arose in that the addition of the current balance function resulted in a loss of redundant function.
従って、本発明は、電流バランス機能を付加しても冗長
機能を失うことのない電源ユニットの並列冗長運転方式
を提供することを目的とする。Therefore, an object of the present invention is to provide a parallel redundant operation system for power supply units that does not lose its redundant function even when a current balance function is added.
第１図は本発明の原理図である。 FIG. 1 is a diagram showing the principle of the present invention.
本発明は、第１図に示すように、出力電圧を一定電圧に
制御するための電圧制御部１と、出力電圧を検出し、所
定の電圧と比較し、制御電圧を該電圧制御部ｌに出力す
る第１の電圧比較部２と、該第１の電圧比較部２の出力
電圧検出点に接続され、出力電流に比例した電圧を発生
する電圧源３とを有する電源ユニットＰＷＲ１、ＰＷＲ
２を負荷Ｒに対し複数並列に接続し、各電源ユニッ）Ｐ
ＷＲ１、ＰＷＲ２の該電圧源３を電流バランス端子を通
して互いに接続してなる電源ユニットの並列冗長運転方
式において、各電源ユニットＰＷＲ１、ＰＷＲ２に、該
出力電圧を検出し、所定の電圧と比較し、制御電圧を該
電圧制御部１に出力する第２の電圧比較部４を設けたも
のである。As shown in FIG. 1, the present invention includes a voltage control section 1 for controlling an output voltage to a constant voltage, a voltage control section 1 that detects the output voltage, compares it with a predetermined voltage, and applies a control voltage to the voltage control section 1. Power supply units PWR1, PWR which have a first voltage comparison section 2 that outputs, and a voltage source 3 that is connected to the output voltage detection point of the first voltage comparison section 2 and generates a voltage proportional to the output current.
2 are connected in parallel to the load R, and each power supply unit) P
In a parallel redundant operation method of power supply units in which the voltage sources 3 of WR1 and PWR2 are connected to each other through current balance terminals, each power supply unit PWR1 and PWR2 detects the output voltage, compares it with a predetermined voltage, and controls it. A second voltage comparison section 4 that outputs a voltage to the voltage control section 1 is provided.
本発明では、各電源ユニッ）ＰＷＲｌ、ＰＷＲ２に２系
統の電圧比較部２．４を設け、両者の出力で電圧制御部
Ｉを制御するようにしている。In the present invention, two voltage comparators 2.4 are provided in each power supply unit PWRl and PWR2, and the voltage controller I is controlled by the outputs of both.
ここで、第１の電圧比較部２が出力電圧Ｖｏｕｔ１に、
第２の電圧比較部４が出力電圧をＶｏｕｔ２ （Ｖｏｕ
ｔｌ＞Ｖｏｕｔ２）に制御するように設定しておけば、
両電源ユニソ）ＰＷＲ１、ＰＷＲ２が正常に動作してい
る場合には、第１の電圧比較部２の制御電圧が第２の電
圧比較部４の制御電圧より大となって、第１の電圧比較
部２によって電流バランスに応して電圧制御部１が制ｆ
′ｌＩＩされる。Here, the first voltage comparator 2 outputs the output voltage Vout1,
The second voltage comparator 4 converts the output voltage to Vout2 (Vou
If you set it to control tl>Vout2),
When PWR1 and PWR2 are operating normally, the control voltage of the first voltage comparator 2 becomes higher than the control voltage of the second voltage comparator 4, and the first voltage comparison The voltage control unit 1 controls f according to the current balance by the unit 2.
'lII will be done.
一方、電源ユニットＰＷＲＩ ＰＷＲ２の一方がダウン
すると、ダウンしてない電源ユニットの第１の電圧比較
部２の制御電圧はほとんどＯとなるから、第２の電圧比
較部４の制御電圧によって電圧制御部ｌが制御され、冗
長運転が実現される。On the other hand, when one of the power supply units PWRI and PWR2 goes down, the control voltage of the first voltage comparison section 2 of the power supply unit that is not down becomes almost O, so the voltage control section is controlled by the control voltage of the second voltage comparison section 4. l is controlled and redundant operation is realized.
ｔａ＋ 一実施例の説明 第２図は本発明の一実施例構成図である。 ta+ Explanation of one embodiment FIG. 2 is a configuration diagram of an embodiment of the present invention.
図中、第１図及び第３図で示したものと同一のものは、
同一の記号で示しである。In the figure, the same things as shown in Figures 1 and 3 are:
Indicated by the same symbol.
第２の電圧比較部４は、出力電圧端子間に設けられた直
列抵抗ｒ５、ｒ６と、直列抵抗ｒ５、ｒ８による出力電
圧の分圧電圧と所定電圧■０とそ比較し、制御電圧を発
生する比較アンプ（誤差増幅器）ＡＭＰ２と、比較アン
プＡＭＰ２の出力を電圧制御部ｌのＰＷＭ回路ＰＷＭに
導くダイオードＤ５とを有する。The second voltage comparator 4 compares the divided voltage of the output voltage by the series resistors r5 and r6 provided between the output voltage terminals and the series resistors r5 and r8 with a predetermined voltage 0 and generates a control voltage. and a diode D5 that leads the output of the comparison amplifier AMP2 to the PWM circuit PWM of the voltage control section l.
第１の電圧比較部２にも、比較アンプＡＭＰ １の出力
を電圧制御部１のＰＷＭ回路ＰＷＭに導くダイオードＤ
４が設けられており、従って、両比較アンプＡＭＰ１、
ＡＭＰ２の出力はダイオードＯＲされてＰＷＭ回路ＰＷ
Ｍへ入力する。The first voltage comparison section 2 also includes a diode D that leads the output of the comparison amplifier AMP 1 to the PWM circuit PWM of the voltage control section 1.
4 are provided, therefore both comparison amplifiers AMP1,
The output of AMP2 is diode-ORed and connected to the PWM circuit PW.
Enter into M.
この比較アンプＡＭＰ １は出力電圧をＶｏｕｔｌに、
比較アンプＡＭＰ ２は出力電圧をＶｏｕｔ２ （Ｖｏ
ｕｔｌ＞Ｖｏｕｔ２）に制御するように設定され、例え
ば出力電圧が５Ｖの場合、Ｖｏｕｔ １ ＝５．ＯＶ、
Ｖｏｕｔ２≦４．９Ｖにセットする。This comparison amplifier AMP 1 sets the output voltage to Voutl,
Comparison amplifier AMP2 output voltage Vout2 (Vo
For example, when the output voltage is 5V, Vout 1 =5. OV,
Set Vout2≦4.9V.
次に、実施例の動作について説明する。Next, the operation of the embodiment will be explained.
先づ、電源ユニッ）ＰＷＲ１、ＰＷＲ２が正常に動作し
ている場合には、比較アンプＡＭＰＩの制御電圧Ｖ、１
と比較アンプＡＭＰ２の制御電圧Ｖ、２との関係は、Ｖ
ＡＩ＞ＶＡ２となり、ダイオードＯＲにより比較アンプ
ＡＭＰＩの制御電圧Ｖ、ｌが有効となって、ＰＷＭ回路
ＰＷＭに出力される。First, if the power supply unit) PWR1 and PWR2 are operating normally, the control voltage V,1 of the comparator amplifier AMPI
The relationship between and the control voltage V,2 of the comparison amplifier AMP2 is V
AI>VA2, and the control voltages V and l of the comparator amplifier AMPI become valid by the diode OR and are output to the PWM circuit PWM.
従って、出力電圧は５．ＯＶとなり、電流バランス動作
は、第２の電圧比較部４が設けられていない状態と同一
のもの、即ち第３図で示した従来通りの動作を行う。Therefore, the output voltage is 5. OV, and the current balance operation is the same as in the state where the second voltage comparator 4 is not provided, that is, the conventional operation shown in FIG. 3 is performed.
次に、電源ユニットＰＷＲ２がダウンした場合には、第
３図の従来技術で説明したように、電源ユニッ）ＰＷＲ
１の第１の電圧比較部２の比較アンプＡＭＰＩの入力電
圧Ｖｓ＋は大幅に上昇し、比較アンプＡＭＰＩの制御電
圧Ｖ＾１ξＯＶとなり、ダイオードＤ４がカットオフし
、第２の電圧比較部４の比較アンプＡＭＰ２の出力〈制
御電圧）が有効となる。Next, when the power supply unit PWR2 goes down, as explained in the prior art in FIG.
The input voltage Vs+ of the comparator amplifier AMPI of the first voltage comparator 2 of 1 rises significantly and becomes the control voltage V^1ξOV of the comparator amplifier AMPI, the diode D4 is cut off, and the comparison of the second voltage comparator 4 increases. The output (control voltage) of the amplifier AMP2 becomes valid.
このため、出力電圧は、比較アンプＡＭＰ２の設定値で
ある４、９■に保たれ、冗長運転が実現できる。Therefore, the output voltage is maintained at the set value of the comparator amplifier AMP2 of 4.9■, and redundant operation can be realized.
尚、負荷の電圧精度は通常５Ｖ±５％（５，２５〜４．
７５Ｖ）であり、電源の出力電圧が４．９Ｖ程度まで低
下しても負荷は正常に動作する。In addition, the voltage accuracy of the load is usually 5V±5% (5, 25 to 4.
75V), and the load operates normally even if the output voltage of the power supply drops to about 4.9V.
従って、電源ユニットＰＷＲ２がダウンしても、負荷電
流が電源ユニットＰＷＲＩの出力電流以下であれば正常
に動作を続けることができる。Therefore, even if power supply unit PWR2 goes down, normal operation can be continued as long as the load current is equal to or less than the output current of power supply unit PWRI.
（ｂ） 他の実施例の説明
上述の実施例では２台の電源ユニットの並列運転につい
て説明したが、３台以上の電源ユニットの並列運転にも
適用できる。(b) Description of other embodiments In the above-mentioned embodiments, parallel operation of two power supply units has been described, but it can also be applied to parallel operation of three or more power supply units.
又、電圧制御部１、電圧比較部２．４も実施例のものに
限られず、いわゆる安定化電源を構成するものであれば
よい。Furthermore, the voltage control section 1 and the voltage comparison section 2.4 are not limited to those of the embodiments, but may be of any type as long as they form a so-called stabilized power source.
以上本発明を実施例により説明したが、本発明は本発明
の主旨に従い種々の変形が可能であり、本発明からこれ
らを排除するものではない。Although the present invention has been described above using examples, the present invention can be modified in various ways according to the gist of the present invention, and these are not excluded from the present invention.
以上説明した様に、本発明によれば、各電源ユニットに
、電流バランス制御を行う第１の電圧比較部の他に、第
２の電圧比較部を設けているので、各電源ユニットを電
流バランスする機能を与えても、電源ユニットの１台が
ダウンした時代の電源ユニットで運転する冗長運転を実
現できるという効果を奏し、安定な並列冗長・電流バラ
ンス運転の実現に寄与することろが大きい。As explained above, according to the present invention, each power supply unit is provided with a second voltage comparison section in addition to the first voltage comparison section that performs current balance control, so that each power supply unit is Even if this function is provided, it has the effect of realizing redundant operation using the power supply unit of the era when one of the power supply units is down, which greatly contributes to the realization of stable parallel redundant and current balanced operation.
第１図は本発明の原理図、
第２図は本発明の一実施例構成図、
第３図は従来技術の説明図である。
図中、ＰＷＲ１，ＰＷＲ２−電源ユニット−・電圧制御
部、
２−第１の電圧比較部、
ト、
３
・電圧源、
第２の電圧比較部、
負荷。FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a configuration diagram of an embodiment of the present invention, and FIG. 3 is an explanatory diagram of the prior art. In the figure, PWR1, PWR2 - power supply unit - voltage control section, 2 - first voltage comparison section, 3. voltage source, second voltage comparison section, load.
Claims (1)
と、 出力電圧を検出し、所定の電圧と比較し、制御電圧を該
電圧制御部（１）に出力する第１の電圧比較部（２）と
、該第１の電圧比較部（２）の出力電圧検出点に接続さ
れ、出力電流に比例した電圧を発生する電圧源（３）と
を有する電源ユニット（ＰＷＲ１、ＰＷＲ２）を負荷（
Ｒ）に対し複数並列に接続し、 各電源ユニット（ＰＷＲ１、ＰＷＲ２）の該電圧源（３
）を電流バランス端子を通して互いに接続してなる電源
ユニットの並列冗長運転方式において、 各電源ユニット（ＰＷＲ１、ＰＷＲ２）に、該出力電圧
を検出し、所定の電圧と比較し、制御電圧を該電圧制御
部（１）に出力する第２の電圧比較部（４）を設けたこ
とを特徴とする電源ユニットの並列冗長運転方式。[Claims] Voltage control unit (1) for controlling output voltage to a constant voltage
a first voltage comparison section (2) that detects the output voltage, compares it with a predetermined voltage, and outputs a control voltage to the voltage control section (1); A power supply unit (PWR1, PWR2) having a voltage source (3) connected to the output voltage detection point and generating a voltage proportional to the output current is
R) is connected in parallel to the corresponding voltage source (3) of each power supply unit (PWR1, PWR2).
) are connected to each other through current balance terminals.In the parallel redundant operation method of power supply units, each power supply unit (PWR1, PWR2) detects the output voltage, compares it with a predetermined voltage, and sets the control voltage to the voltage control. 1. A parallel redundant operation system for a power supply unit, characterized in that a second voltage comparison section (4) is provided which outputs an output to the section (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1316229A JP2846679B2 (en) | 1989-12-05 | 1989-12-05 | Parallel redundant operation of power supply units |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1316229A JP2846679B2 (en) | 1989-12-05 | 1989-12-05 | Parallel redundant operation of power supply units |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03178526A true JPH03178526A (en) | 1991-08-02 |
| JP2846679B2 JP2846679B2 (en) | 1999-01-13 |
Family
ID=18074749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1316229A Expired - Fee Related JP2846679B2 (en) | 1989-12-05 | 1989-12-05 | Parallel redundant operation of power supply units |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2846679B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102857099A (en) * | 2011-06-30 | 2013-01-02 | 鸿富锦精密工业（深圳）有限公司 | Current balancing circuit |
| KR102318535B1 (en) * | 2020-12-31 | 2021-10-28 | 주식회사 엘파워 | String-optima with string leakage current detection and trip function of solar power generation system |
-
1989
- 1989-12-05 JP JP1316229A patent/JP2846679B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102857099A (en) * | 2011-06-30 | 2013-01-02 | 鸿富锦精密工业（深圳）有限公司 | Current balancing circuit |
| KR102318535B1 (en) * | 2020-12-31 | 2021-10-28 | 주식회사 엘파워 | String-optima with string leakage current detection and trip function of solar power generation system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2846679B2 (en) | 1999-01-13 |
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