JPS6245474Y2 - - Google Patents

Info

Publication number
JPS6245474Y2
JPS6245474Y2 JP17000480U JP17000480U JPS6245474Y2 JP S6245474 Y2 JPS6245474 Y2 JP S6245474Y2 JP 17000480 U JP17000480 U JP 17000480U JP 17000480 U JP17000480 U JP 17000480U JP S6245474 Y2 JPS6245474 Y2 JP S6245474Y2
Authority
JP
Japan
Prior art keywords
input
circuit
output
switch
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
Application number
JP17000480U
Other languages
Japanese (ja)
Other versions
JPS5792351U (en
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 filed Critical
Priority to JP17000480U priority Critical patent/JPS6245474Y2/ja
Publication of JPS5792351U publication Critical patent/JPS5792351U/ja
Application granted granted Critical
Publication of JPS6245474Y2 publication Critical patent/JPS6245474Y2/ja
Expired legal-status Critical Current

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Relay Circuits (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)

Description

【考案の詳細な説明】 この考案は、半導体回路で構成され、電圧また
は電流の検出を行なう静止形継電器に関する。
DETAILED DESCRIPTION OF THE INVENTION This invention relates to a static relay that is configured with a semiconductor circuit and that detects voltage or current.

従来の静止形継電器は、第1図及び第2図に示
すように、直流用(第1図)と交流用(第2図)
とで別個に構成されるのが普通であつた。すなわ
ち、演算増幅器14と、入力抵抗7と、帰還可変
抵抗8とにより反転増幅回路1を構成し、入力端
子11,12に加えられた入力電圧を次段以降の
回路に都合のよいレベルに変換するようにし、こ
の反転増幅回路1の出力を比較回路4で基準電圧
と比較し、過電圧または不足電圧を判定してパワ
ー回路5を経て出力リレー6を駆動するのである
が、交流の場合には第2図に示すようにダイオー
ドブリツジよりなる全波整流回路2を挿入しなけ
ればならず、この各ダイオードにおいて順方向降
下電圧が生じるので、交流と直流とでは反転増幅
回路1の増幅度を異ならす必要があるからであ
る。
As shown in Figures 1 and 2, conventional static relays are for DC (Figure 1) and AC (Figure 2).
It was common for these to be constructed separately. That is, an inverting amplifier circuit 1 is configured by an operational amplifier 14, an input resistor 7, and a feedback variable resistor 8, and converts the input voltage applied to the input terminals 11 and 12 to a level convenient for the circuits in the subsequent stages. The output of the inverting amplifier circuit 1 is compared with the reference voltage in the comparator circuit 4 to determine overvoltage or undervoltage and drive the output relay 6 via the power circuit 5. As shown in Figure 2, a full-wave rectifier circuit 2 consisting of a diode bridge must be inserted, and a forward voltage drop occurs in each of these diodes, so the amplification degree of the inverting amplifier circuit 1 is different between AC and DC. This is because they need to be different.

本考案は、上記のように交流用と直流用とで別
個に構成する必要がなく、交流・直流共用型の静
止形継電器を提供することを目的とする。
An object of the present invention is to provide a static relay that can be used for both AC and DC, without requiring separate configurations for AC and DC as described above.

以下、この考案の一実施例を図面にもとづいて
説明する。第3図は、この考案を電圧検出を行な
う静止形継電器に適用したものである。入力電圧
は、反転増幅回路1の入力端子11,12へ印加
される。入力端子11は、入力抵抗15,16を
介して演算増幅器14の反転入力端子へ接続され
る。入力抵抗16と並列にスイツチ13が接続さ
れる。入力端子12は、演算増幅器14の非反転
入力端子へ直接接続される。入力端子12と演算
増幅器14の非反転入力端子の接続点は、図示さ
れていない基準点(GND)へ接続される。演算
増幅器14の出力と反転入力端子は、帰還可変抵
抗17を介して接続される。反転増幅回路1の出
力は、全波整流回路2の入力へ接続される。全波
整流回路2の出力は、平滑回路3の入力へ接続さ
れる。平滑回路3の出力は、比較回路4の入力へ
接続される。比較回路4の出力は、パワー回路5
の入力へ接続される。パワー回路5の出力は、出
力リレー6を駆動する。
An embodiment of this invention will be described below based on the drawings. FIG. 3 shows this invention applied to a static relay that detects voltage. The input voltage is applied to input terminals 11 and 12 of the inverting amplifier circuit 1. Input terminal 11 is connected to an inverting input terminal of operational amplifier 14 via input resistors 15 and 16. A switch 13 is connected in parallel with the input resistor 16. Input terminal 12 is connected directly to a non-inverting input terminal of operational amplifier 14 . A connection point between the input terminal 12 and the non-inverting input terminal of the operational amplifier 14 is connected to a reference point (GND) not shown. The output of the operational amplifier 14 and the inverting input terminal are connected via a feedback variable resistor 17. The output of the inverting amplifier circuit 1 is connected to the input of a full-wave rectifier circuit 2. The output of the full-wave rectifier circuit 2 is connected to the input of the smoothing circuit 3. The output of the smoothing circuit 3 is connected to the input of the comparison circuit 4. The output of the comparison circuit 4 is sent to the power circuit 5.
connected to the input of The output of power circuit 5 drives output relay 6.

第3図のように構成された静止形継電器の入力
端子11,12に入力が加えられると、反転増幅
回路1によつて後段の回路で処理しやすいレベル
に変換される。この反転増幅回路1の出力は全波
整流回路2によつて比較回路4の基準電圧と極性
が等しくなるように変換される。全波整流回路2
の出力は平滑回路3によつてリツプル分が除去さ
れ、平均値が出力される。平滑回路3の出力は比
較回路4によつて基準電圧と比較されて、平滑回
路3の出力が基準電圧より大きい場合に出力リレ
ー6を駆動するような信号が比較回路4よりパワ
ー回路5へ入力される。
When an input is applied to the input terminals 11 and 12 of the static relay configured as shown in FIG. 3, it is converted by the inverting amplifier circuit 1 to a level that can be easily processed by the subsequent circuit. The output of the inverting amplifier circuit 1 is converted by a full-wave rectifier circuit 2 so that its polarity is equal to that of the reference voltage of a comparator circuit 4. Full wave rectifier circuit 2
The ripple component is removed from the output by the smoothing circuit 3, and the average value is output. The output of the smoothing circuit 3 is compared with a reference voltage by a comparison circuit 4, and when the output of the smoothing circuit 3 is higher than the reference voltage, a signal that drives the output relay 6 is inputted from the comparison circuit 4 to the power circuit 5. be done.

ところで、交流(正弦波)を入力した場合の平
滑回路4の出力は交流電圧の平均値に対応したも
のということになるが、交流電圧の実効値Eev
は、平均値Eavに対し、 の関係にある。したがつて交流入力の場合の反転
増幅回路1の増幅度を直流入力の場合の増幅度の
“π/2√2”倍とすることにより、交流電圧の
実効値と直流電圧の平均値とを全波整流回路2以
降の回路において同じに扱うことができ、結局、
交流電圧(実効値)と直流電圧(平均値)とで継
電器としての動作値を同じにできて、交流・直流
共用可能となる。
By the way, the output of the smoothing circuit 4 when AC (sine wave) is input corresponds to the average value of AC voltage, but the effective value Eev of AC voltage
is for the average value Eav, There is a relationship between Therefore, by setting the amplification degree of the inverting amplifier circuit 1 for AC input to "π/2√2" times the amplification degree for DC input, the effective value of AC voltage and the average value of DC voltage can be Full-wave rectifier circuit 2 and subsequent circuits can be treated in the same way, and in the end,
The operating value of the relay can be the same for AC voltage (effective value) and DC voltage (average value), making it possible to use both AC and DC.

抵抗15,16,17の抵抗値をR15,R16
R17としたときスイツチ13が開のときの反転増
幅回路1の増幅度AOFFは AOFF=−R17/R15+R16 となり、スイツチ13が閉のときの増幅度AONは AON=−R17/R15 となる。R16ならば となる。従つて、交流入力の場合スイツチ13を
閉とし、直流入力の場合スイツチ13を開とすれ
ば、実効値としての交流入力と、直流入力とに対
して平滑回路3の出力は等しくなる。
The resistance values of resistors 15, 16, and 17 are R 15 , R 16 ,
R 17 , the amplification degree A OFF of the inverting amplifier circuit 1 when the switch 13 is open is A OFF = -R 17 /R 15 + R 16 , and the amplification degree A ON when the switch 13 is closed is A ON = -R 17 /R 15 . R 16 If so becomes. Therefore, if the switch 13 is closed in the case of AC input and opened in the case of DC input, the output of the smoothing circuit 3 will be equal to the AC input as an effective value and the DC input.

第4図は、この考案の他の実施例を示すもの
で、入力端子11は可変抵抗18を介して演算増
幅器14の反転入力端子へ接続され、演算増幅器
14の出力は抵抗19,20を介して反転入力端
子と接続される。抵抗20と並列にスイツチ13
が接続される。他は、第1の実施例と同じであ
る。
FIG. 4 shows another embodiment of this invention, in which the input terminal 11 is connected to the inverting input terminal of an operational amplifier 14 through a variable resistor 18, and the output of the operational amplifier 14 is connected through resistors 19 and 20. is connected to the inverting input terminal. Switch 13 in parallel with resistor 20
is connected. The rest is the same as the first embodiment.

とし、交流入力の場合スイツチ13を開とし、直
流入力の場合スイツチ13を閉にすれば、実効値
としての交流入力と、直流入力とに対して平滑回
路3の増幅度は等しくなる。
If the switch 13 is opened in the case of AC input and the switch 13 is closed in the case of DC input, the amplification degree of the smoothing circuit 3 becomes equal for the AC input and the DC input as effective values.

以上実施例について説明したように、本考案に
よれば、入力端子の直後に接続された増幅回路に
おいて、スイツチの開閉によつて交流入力時の増
幅度を直流入力時の増幅度の“π/2√2”倍と
なるようにしたので、実効値としての交流と直流
とを以降の回路で同等に扱うことができ、また全
波整流回路や平滑回路での電圧降下等が交流及び
直流の両方に同等に影響を及ぼすので、電圧また
は電流の検出を行なう静止形継電器を交流・直流
で共用できる。
As described in the embodiments above, according to the present invention, in the amplifier circuit connected immediately after the input terminal, the amplification degree at the time of AC input is changed to "π/" of the amplification degree at DC input by opening and closing the switch. 2√2” times, so AC and DC can be treated equally in the subsequent circuits as effective values, and voltage drops in full-wave rectifier circuits and smoothing circuits are reduced by AC and DC. Since it affects both equally, a static relay that detects voltage or current can be used in both AC and DC.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図及び第2図はそれぞれ従来例のブロツク
図、第3図は本考案の一実施例のブロツク図、第
4図は他の実施例のブロツク図である。 1……反転増幅回路、2……全波整流回路、3
……平滑回路、4……比較回路、5……パワー回
路、6……出力リレー、11,12……入力端
子、14……演算増幅器。
1 and 2 are block diagrams of a conventional example, FIG. 3 is a block diagram of one embodiment of the present invention, and FIG. 4 is a block diagram of another embodiment. 1...Inverting amplifier circuit, 2...Full wave rectifier circuit, 3
... Smoothing circuit, 4 ... Comparison circuit, 5 ... Power circuit, 6 ... Output relay, 11, 12 ... Input terminal, 14 ... Operational amplifier.

Claims (1)

【実用新案登録請求の範囲】 (1) 演算増幅器とその入力抵抗及び帰還抵抗とス
イツチとにより構成され、前記スイツチの開閉
により交流入力のときの増幅度が直流入力のと
きの増幅度の“π/2√2”倍となるように構
成された増幅回路と、この増幅回路の出力に接
続された全波整流回路と、この全波整流回路の
出力に接続された平滑回路と、この平滑回路の
出力に接続され、基準出力と前記平滑回路出力
とを比較する比較回路とを備えた静止形継電
器。 (2) 前記スイツチは前記入力抵抗の一部と並列に
接続されていることを特徴とする実用新案登録
請求の範囲第1項記載の静止形継電器。 (3) 前記スイツチは前記帰還抵抗の一部と並列に
接続されていることを特徴とする実用新案登録
請求の範囲第1項記載の静止形継電器。
[Claims for Utility Model Registration] (1) Consisting of an operational amplifier, its input resistor, feedback resistor, and switch, the amplification degree for AC input is changed to "π" from the amplification degree for DC input by opening and closing of the switch. /2√2” times, a full-wave rectifier circuit connected to the output of this amplifier circuit, a smoothing circuit connected to the output of this full-wave rectifier circuit, and this smoothing circuit. A static relay, comprising: a comparison circuit connected to the output of the amplifier and comparing the reference output with the smoothing circuit output. (2) The static relay according to claim 1, wherein the switch is connected in parallel with a part of the input resistor. (3) The static relay according to claim 1, wherein the switch is connected in parallel with a part of the feedback resistor.
JP17000480U 1980-11-27 1980-11-27 Expired JPS6245474Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17000480U JPS6245474Y2 (en) 1980-11-27 1980-11-27

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17000480U JPS6245474Y2 (en) 1980-11-27 1980-11-27

Publications (2)

Publication Number Publication Date
JPS5792351U JPS5792351U (en) 1982-06-07
JPS6245474Y2 true JPS6245474Y2 (en) 1987-12-04

Family

ID=29528475

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17000480U Expired JPS6245474Y2 (en) 1980-11-27 1980-11-27

Country Status (1)

Country Link
JP (1) JPS6245474Y2 (en)

Also Published As

Publication number Publication date
JPS5792351U (en) 1982-06-07

Similar Documents

Publication Publication Date Title
US5712774A (en) Device for suppressing higher harmonic current of power source
JPS6245474Y2 (en)
EP0580237B1 (en) Power factor correction circuit
JP2686070B2 (en) Neutral wire open phase detection circuit breaker
JPS61173672A (en) Automatic switching type rectifier
CN211606434U (en) Voltage conversion device and motor speed feedback system
JPH0326280U (en)
JPH09285115A (en) Power source equipment
JP3508553B2 (en) DC power supply
JP2001218471A (en) Switching power supply
KR0161835B1 (en) Overcurrent relay for open phase protection
JPS6016120Y2 (en) Inrush current prevention circuit
JP3090299B2 (en) Power supply circuit
JPS6042099U (en) Electric motor braking device
JPH11332242A (en) Inrush current prevention circuit
JP2629585B2 (en) Inrush current suppression circuit
JPS6117408Y2 (en)
JPH0767225B2 (en) AA neutral wire open phase detection circuit breaker
JPS6248215A (en) Overcurrent relay for dc circuit
JPH0742569U (en) Rectifier power supply circuit
JPH02106173A (en) Voltage sensing circuit and power supply
JPH09298876A (en) Rush current control circuit of power supply
JPH0325889B2 (en)
JPS61273120A (en) Missed phase detector/breaker
JPH0622542A (en) Power supply