JPS6059969U - Isolated current/voltage detection circuit - Google Patents
Isolated current/voltage detection circuitInfo
- Publication number
- JPS6059969U JPS6059969U JP15264383U JP15264383U JPS6059969U JP S6059969 U JPS6059969 U JP S6059969U JP 15264383 U JP15264383 U JP 15264383U JP 15264383 U JP15264383 U JP 15264383U JP S6059969 U JPS6059969 U JP S6059969U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- detection circuit
- voltage detection
- current
- detected current
- 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
- Measurement Of Current Or Voltage (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来のホトカプラによる絶縁形電圧検出回路図
、第２図はホトカプラの伝達効率の経時変化及び温度特
性による゛影響をなくした本考案による絶縁形電流・電
圧検出回路の構成例を示す図、第３図はその動作波形の
略図である。
１・・・抵抗、２・・・誤差増幅器、３・・・ホトカプ
ラ、４・・・パルス幅変調器、５・・・論理ゲート、■
亡・被検出電圧、Ｖｆ・・・変調波形、Ｖｆ’・・・論
理ゲート入力電圧波形、Ｖｆ’・・・論理ゲート出力電
圧波形、■２・・・出力電圧、Ｅ・・・基準電圧、Ｅａ
・・・電源電圧、Ｒ□・・・抵抗、Ｃ１・・・コンデン
サ。Figure 1 shows a diagram of an isolated voltage detection circuit using a conventional photocoupler, and Figure 2 shows a configuration example of an isolated current/voltage detection circuit according to the present invention that eliminates the effects of changes in photocoupler transfer efficiency over time and temperature characteristics. FIG. 3 is a schematic diagram of its operating waveforms. 1...Resistor, 2...Error amplifier, 3...Photocoupler, 4...Pulse width modulator, 5...Logic gate, ■
Vf...modulation waveform, Vf'...logic gate input voltage waveform, Vf'...logic gate output voltage waveform, ■2...output voltage, E...reference voltage, Ea
...Power supply voltage, R□...Resistance, C1...Capacitor.
Claims (1)
路において、該被検出電流・電圧をパルス幅変調器によ
り該被検出電流・電圧の大きさに−応じてパルス幅が変
化する矩形波に変換し、該矩形波をホトカプラ及び論理
ゲートを軽重して積分回路の入力に伝達し、該積分回路
にて前記矩形波を平均化することにより、前記被検出電
流・電圧に対して直線的に変化する直流電圧を得ること
を特徴とする絶縁形電流・電圧検出回路。In a current/voltage detection circuit that insulates and transmits the detected current/voltage, the detected current/voltage is converted into a rectangular wave whose pulse width changes according to the magnitude of the detected current/voltage using a pulse width modulator. The rectangular wave is transmitted to the input of an integrating circuit by using a photocoupler and a logic gate, and the integrating circuit averages the rectangular wave, so that it is linear with respect to the detected current/voltage. An isolated current/voltage detection circuit characterized by obtaining a DC voltage that changes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15264383U JPS6059969U (en) | 1983-10-01 | 1983-10-01 | Isolated current/voltage detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15264383U JPS6059969U (en) | 1983-10-01 | 1983-10-01 | Isolated current/voltage detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6059969U true JPS6059969U (en) | 1985-04-25 |
Family
ID=30337933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15264383U Pending JPS6059969U (en) | 1983-10-01 | 1983-10-01 | Isolated current/voltage detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6059969U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0458162A (en) * | 1990-06-27 | 1992-02-25 | Hitachi Cable Ltd | High-voltage measuring instrument and high-voltage phase difference measuring instrument |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5529B2 (en) * | 1973-10-29 | 1980-01-05 |
-
1983
- 1983-10-01 JP JP15264383U patent/JPS6059969U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5529B2 (en) * | 1973-10-29 | 1980-01-05 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0458162A (en) * | 1990-06-27 | 1992-02-25 | Hitachi Cable Ltd | High-voltage measuring instrument and high-voltage phase difference measuring instrument |
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