JPH0161186B2 - - Google Patents
Info
- Publication number
- JPH0161186B2 JPH0161186B2 JP19204981A JP19204981A JPH0161186B2 JP H0161186 B2 JPH0161186 B2 JP H0161186B2 JP 19204981 A JP19204981 A JP 19204981A JP 19204981 A JP19204981 A JP 19204981A JP H0161186 B2 JPH0161186 B2 JP H0161186B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- input
- average value
- output
- output terminal
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/10—Measuring sum, difference or ratio
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Description
【発明の詳細な説明】
本発明は、多数の入力電圧のそれぞれとこれら
の入力電圧の平均値との間の電圧偏差を検出する
ための装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for detecting voltage deviations between each of a number of input voltages and the average value of these input voltages.
この種の検出装置は、例えば多数の電源装置を
並列運転するときの電流分担を監視もしくは制御
する装置においてしばしば用いられる。すなわ
ち、各電源装置に出力電流検出器が設けられ、こ
れらの出力電流検出器の出力電圧が電圧偏差検出
装置に入力される。電力偏差検出装置は入力され
る電圧の平均値を算出して、この平均値に対する
各電圧の偏差に相当する出力電圧を発生する。 This type of detection device is often used, for example, in a device that monitors or controls current sharing when a large number of power supplies are operated in parallel. That is, each power supply device is provided with an output current detector, and the output voltages of these output current detectors are input to the voltage deviation detection device. The power deviation detection device calculates an average value of input voltages and generates an output voltage corresponding to the deviation of each voltage from this average value.
第１図はこの種の電圧偏差検出装置の従来例を
示す。この装置は入力電圧e1〜eoの個数に等しい
個数の入力端子および出力端子を備え、平均値を
求めるための加算増幅部Q0と、平均値からの偏
差を求めるためのｎ個の加算増幅部Q1〜Qoとか
ら構成されている。各入力端子はそれぞれ入力抵
抗R1およびスイツチS1を介して演算増幅器の反
転入力端子に接続されている。さらに演算増幅器
にはそれぞれスイツチS2を介してｎ個の帰還抵抗
R2が接続されている。すべてのスイツチがオン
されている場合には、この増幅部Q0の出力電圧
v0は、R1＝R2とすると、
v0＝−e1＋e2＋…＋eo／ｎ
となり、入力電圧e1〜eoの平均値となる。 FIG. 1 shows a conventional example of this type of voltage deviation detection device. This device is equipped with a number of input terminals and output terminals equal to the number of input voltages e 1 to e o , a summing amplifier Q 0 for determining the average value, and n summing amplifiers for determining the deviation from the average value. It is composed of amplifier sections Q 1 to Q o . Each input terminal is connected to the inverting input terminal of the operational amplifier via an input resistor R 1 and a switch S 1 , respectively. Furthermore, each operational amplifier is connected to n feedback resistors via switch S2 .
R 2 is connected. When all switches are on, the output voltage of this amplifier Q 0
When R 1 =R 2 , v 0 becomes v 0 =−e 1 +e 2 +...+e o /n, which is the average value of the input voltages e 1 to e o .
増幅部Q1〜Qoはそれぞれ演算増幅器と２つの
入力抵抗Rioと帰還抵抗RfとスイツチS3とから構
成されている。増幅部Q1の出力電圧v1は、
v1＝−Rf／Rio（v0＋e1）
＝Rf／Rio（e1＋e2＋…＋eo／ｎ−e1）
と表わすことができ、これは平均値に対する入力
電圧e1の偏差に比例する。他の出力電圧v2〜voに
ついても同様に所望の偏差に相当する値が得られ
る。 Each of the amplifier sections Q 1 to Q o is composed of an operational amplifier, two input resistors R io , a feedback resistor R f , and a switch S 3 . The output voltage v 1 of the amplifier Q 1 can be expressed as v 1 = −R f /R io (v 0 + e 1 ) = R f /R io (e 1 + e 2 +...+e o /ne - e 1 ) , which is proportional to the deviation of the input voltage e 1 from the average value. Similarly, values corresponding to the desired deviations can be obtained for the other output voltages v 2 to vo .
先に述べたように多数の電源装置を並列運転す
る場合に、保守点検もしくは故障のためにいずれ
かの電源装置を切り離したときには、その電源装
置に対応するスイツチS1〜S3がオフされる。これ
によつて演算部Q0は正しく平均値を算出するこ
とができ、また切り離された電源装置に対応する
出力電圧は不動作状態を表わすべく零にされる。 As mentioned above, when many power supplies are operated in parallel, when one of the power supplies is disconnected for maintenance inspection or failure, the switches S 1 to S 3 corresponding to that power supply are turned off. . This allows the calculation unit Q 0 to correctly calculate the average value, and the output voltage corresponding to the disconnected power supply device is set to zero to represent the non-operating state.
この従来装置は入力点数の変更を必要とする用
途にあつては、多数のスイツチを設けなければな
らず回路が非常に煩雑になるという欠点を有す
る。 This conventional device has the disadvantage that in applications requiring a change in the number of input points, a large number of switches must be provided, making the circuit extremely complicated.
本発明の目的は回路を簡略化することにより上
述の如き欠点を除去することにある。 An object of the present invention is to eliminate the above-mentioned drawbacks by simplifying the circuit.
この目的は、本発明によれば、特許請求の範囲
に記載の構成によつて達成される。 This object is achieved according to the invention by the features described in the claims.
以下、第２図に示す実施例を参照しながら本発
明をさらに詳細に説明する。 The present invention will be explained in more detail below with reference to the embodiment shown in FIG.
第２図に示す本発明実施例によれば、入力電圧
e1〜eoに導かれる入力端子と共通電位端子Ｍとの
間に抵抗ブリツジがそれぞれ接続されている。各
抵抗ブリツジでは、対辺同士の抵抗値の積が互い
に等しくしてあり、つまりr1・r4＝r2・r3なる関
係にある。各抵抗ブリツジの一方の出力端子（す
なわち抵抗r3とr3との接続点）はそれぞれ１つの
スイツチT1〜Toを介して入切可能に一括接続さ
れている。この出力端子と他方の出力端子（抵抗
r1とr2との接続点）との間に生じる差電圧△V1、
△V2、…、△Voが差動増幅器A1，A2，…，Aoに
よつてそれぞれ増幅され、出力電圧v1、v2、…、
voが取り出される。 According to the embodiment of the invention shown in FIG. 2, the input voltage
A resistive bridge is connected between the input terminals led to e 1 to e o and the common potential terminal M, respectively. In each resistance bridge, the products of the resistance values on opposite sides are equal to each other, that is, there is a relationship of r 1 · r 4 = r 2 · r 3 . One output terminal of each resistor bridge (that is, the connection point between resistors r3 and r3 ) is connected collectively via one switch T1 to T0 so that it can be turned on and off. This output terminal and the other output terminal (resistor
The difference voltage △V 1 that occurs between the connection point of r 1 and r 2 ),
△V 2 , ..., △V o are amplified by differential amplifiers A 1 , A 2 , ..., A o , respectively, and output voltages v 1 , v 2 , ...,
v o is retrieved.
各ブリツジの一方の出力端子から流出する電流
をi1、i2、…、ioとすると、
o
〓j=1
ij＝０ ………(1)
が成り立つ。一括接続点ａと共通電位点Ｍとの間
の電圧をVaとすると、
ij＝ej−Va／r3−Va／r4
＝ej／r3−（１／r3＋１／r4）Va ………(2)
(1)、(2)式より
つまり、電圧Vaは入力電圧e1〜eoの平均値に
比例する。したがつて、ｊ番目の入力電圧ejに対
応する抵抗ブリツジから取り出される差電圧△
Vjは、
となる。ところで、r1・r4＝r2・r3であるから、
r2／r1＋r2＝r4／r3＋r4＝Ｋ（定数）
が成り立つので、結局
となる。この差電圧△Vjは差動増幅器Aj（ｊ＝１
〜ｎ）、によつて増幅されて出力電圧Vj（ｊ＝１
〜ｎ）となる。したがつて、各出力電圧vjは入力
電圧ejと平均値との偏差に比例する。 If the currents flowing out from one output terminal of each bridge are i 1 , i 2 , . . . , i o , then o 〓 j=1 i j =0 . If the voltage between the collective connection point a and the common potential point M is V a , then i j = e j −V a /r 3 −V a /r 4 = e j /r 3 −(1/r 3 +1 /r 4 ) V a ......(2) From equations (1) and (2) In other words, the voltage Va is proportional to the average value of the input voltages e 1 to e o . Therefore, the differential voltage △ drawn from the resistor bridge corresponding to the j-th input voltage e j
V j is becomes. By the way, since r 1 · r 4 = r 2 · r 3 , r 2 / r 1 + r 2 = r 4 / r 3 + r 4 = K (constant) holds, so in the end becomes. This differential voltage △V j is applied to the differential amplifier A j (j=1
~n), and the output voltage V j (j=1
〜n). Therefore, each output voltage v j is proportional to the deviation between the input voltage e j and the average value.
入力点数の変更はスイツチT1〜Toの入切を行
うだけでむす。例えば入力電圧e1を無効にしたい
ときにはスイツチT1をオフにすればよい。これ
によつて出力電圧v1は自動的に零になる。なぜな
らば、r1：r2＝r3：r4であるからである。残りの
抵抗ブリツジでは、
が生じる（但し、ｊ＝２〜ｎ）。 Changing the number of input points is accomplished by simply turning on/off switches T 1 to T o . For example, if you want to disable the input voltage e1 , just turn off the switch T1 . As a result, the output voltage v 1 automatically becomes zero. This is because r 1 :r 2 = r 3 :r 4 . In the remaining resistance bridge, occurs (however, j=2 to n).
以上のように、本発明によれば、各入力電圧に
対応する抵抗ブリツジにそれぞれ１つだけのスイ
ツチを設けさえすればよいので、入力点数が多い
場合にも従来装置における如き回路の煩雑さを避
けることができる。 As described above, according to the present invention, it is only necessary to provide only one switch for each resistor bridge corresponding to each input voltage, so even when the number of input points is large, the complexity of the circuit as in conventional devices can be avoided. It can be avoided.
第１図は従来装置を示す回路図、第２図は本発
明一実施例を示す回路図である。
r1〜r4……抵抗ブリツジ、T1〜To……スイツ
チ、A1〜Ao……差動増幅器。
FIG. 1 is a circuit diagram showing a conventional device, and FIG. 2 is a circuit diagram showing an embodiment of the present invention. r 1 to r 4 ...resistance bridge, T 1 to T o ... switch, A 1 to A o ... differential amplifier.
Claims (1)
圧の平均値との間の電圧偏差を検出するための装
値において、各入力電圧を導かれる入力端子と共
通電位端子との間に、対向辺同士の抵抗値の積を
互いに等しく選んだ抵抗ブリツジを接続し、各抵
抗ブリツジの一方の出力端子はそれぞれスイツチ
を介して入切可能に一括接続し、各抵抗ブリツジ
の一方の出力端子と他方の出力端子との間から所
望の電圧偏差をそれぞれ取り出すことを特徴とす
る電圧偏差検出装置。1. In a device for detecting the voltage deviation between each of a number of input voltages and the average value of these input voltages, there is a Resistance bridges selected to have the same product of resistance values are connected, and one output terminal of each resistance bridge is connected together so that it can be turned on and off via a switch, and one output terminal of each resistance bridge is connected to the other output terminal. A voltage deviation detection device characterized by extracting desired voltage deviations from between terminals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19204981A JPS5892962A (en) | 1981-11-30 | 1981-11-30 | Voltage deviation detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19204981A JPS5892962A (en) | 1981-11-30 | 1981-11-30 | Voltage deviation detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5892962A JPS5892962A (en) | 1983-06-02 |
| JPH0161186B2 true JPH0161186B2 (en) | 1989-12-27 |
Family
ID=16284756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19204981A Granted JPS5892962A (en) | 1981-11-30 | 1981-11-30 | Voltage deviation detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5892962A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02141284U (en) * | 1989-04-28 | 1990-11-27 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006296110A (en) * | 2005-04-12 | 2006-10-26 | Fuji Electric Systems Co Ltd | Unit inverter device |
-
1981
- 1981-11-30 JP JP19204981A patent/JPS5892962A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02141284U (en) * | 1989-04-28 | 1990-11-27 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5892962A (en) | 1983-06-02 |
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