JPS63141466U - - Google Patents

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Publication number
JPS63141466U
JPS63141466U JP3261287U JP3261287U JPS63141466U JP S63141466 U JPS63141466 U JP S63141466U JP 3261287 U JP3261287 U JP 3261287U JP 3261287 U JP3261287 U JP 3261287U JP S63141466 U JPS63141466 U JP S63141466U
Authority
JP
Japan
Prior art keywords
circuit
power source
primary
measurement
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
Application number
JP3261287U
Other languages
Japanese (ja)
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 JP3261287U priority Critical patent/JPS63141466U/ja
Publication of JPS63141466U publication Critical patent/JPS63141466U/ja
Pending legal-status Critical Current

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  • Measurement Of Current Or Voltage (AREA)

Description

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

第１図は本考案による電流検知器の実施例を示
すブロツク図、第２図は、第１図における実施例
の具体的回路を示す図、第３図は従来のホトカプ
ラを使用した電流検知器の例を示す回路図である
。 なお、１：信号線、２：シヤント抵抗、３：差
動増幅回路、４：レベル測定回路、５：信号処理
回路、６，６ａ，６ｂ：ホトカプラ、７：発光ダ
イオード、８：ホトトランジスタ、９：負荷抵抗
、１０：電源、１１：電源回路、１３，１３ａ，
１３ｂ，１３ｃ：演算増幅器、１４：トランジス
タ、１５：トランスホーマ、１６ａ，１６ｂ，１
６ｃ：巻線、１７ａ，１７ｂ：出力端、１８：ダ
イオード、１９：コンデンサ、２０：オフセツト
電圧調整用抵抗、２２ａ，２２ｂ，２３ａ，２３
ｂ：抵抗。 Fig. 1 is a block diagram showing an embodiment of a current detector according to the present invention, Fig. 2 is a diagram showing a specific circuit of the embodiment in Fig. 1, and Fig. 3 is a current detector using a conventional photocoupler. FIG. 2 is a circuit diagram showing an example. Note that 1: signal line, 2: shunt resistor, 3: differential amplifier circuit, 4: level measurement circuit, 5: signal processing circuit, 6, 6a, 6b: photocoupler, 7: light emitting diode, 8: phototransistor, 9 : Load resistance, 10: Power supply, 11: Power supply circuit, 13, 13a,
13b, 13c: operational amplifier, 14: transistor, 15: transformer, 16a, 16b, 1
6c: winding, 17a, 17b: output terminal, 18: diode, 19: capacitor, 20: offset voltage adjustment resistor, 22a, 22b, 23a, 23
b: resistance.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 被測定電流が流れる信号線１に接続された測定
用シヤント抵抗２の両端電圧を増幅処理する信号
処理回路５の１次測回路と、該１次側回路と測定
器に接がれる２次側出力回路との間を電気的に絶
縁するホトカプラ６と、直流電源を電源として発
生されたパルス電圧を絶縁トランスホーマ１５を
介して整流し、変換された直流電源として前記１
次側回路に供給する電源回路１１とを具備してな
る電流検出器。 A primary measurement circuit of a signal processing circuit 5 that amplifies the voltage across the measurement shunt resistor 2 connected to the signal line 1 through which the current to be measured flows, and a secondary side connected to the primary side circuit and the measuring instrument. A photocoupler 6 that electrically insulates between the output circuit and the DC power source is used to rectify the pulse voltage generated by the insulation transformer 15 as a converted DC power source.
A current detector comprising a power supply circuit 11 that supplies a next-side circuit.
JP3261287U 1987-03-07 1987-03-07 Pending JPS63141466U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3261287U JPS63141466U (en) 1987-03-07 1987-03-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3261287U JPS63141466U (en) 1987-03-07 1987-03-07

Publications (1)

Publication Number Publication Date
JPS63141466U true JPS63141466U (en) 1988-09-19

Family

ID=30839458

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3261287U Pending JPS63141466U (en) 1987-03-07 1987-03-07

Country Status (1)

Country Link
JP (1) JPS63141466U (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5514B2 (en) * 1975-12-18 1980-01-05
JPS57154065A (en) * 1981-03-19 1982-09-22 Mitsubishi Electric Corp Current voltage converter
JPS58167970A (en) * 1982-03-30 1983-10-04 Toshiba Corp Apparatus for measuring effective value of current
JPS6120869A (en) * 1984-07-10 1986-01-29 Nec Corp Photoinsulated power source module circuit at input circuit of measurement system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5514B2 (en) * 1975-12-18 1980-01-05
JPS57154065A (en) * 1981-03-19 1982-09-22 Mitsubishi Electric Corp Current voltage converter
JPS58167970A (en) * 1982-03-30 1983-10-04 Toshiba Corp Apparatus for measuring effective value of current
JPS6120869A (en) * 1984-07-10 1986-01-29 Nec Corp Photoinsulated power source module circuit at input circuit of measurement system

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