JPS5644859A - Sensing circuit of maximum electric current - Google Patents

Sensing circuit of maximum electric current

Info

Publication number
JPS5644859A
JPS5644859A JP12075979A JP12075979A JPS5644859A JP S5644859 A JPS5644859 A JP S5644859A JP 12075979 A JP12075979 A JP 12075979A JP 12075979 A JP12075979 A JP 12075979A JP S5644859 A JPS5644859 A JP S5644859A
Authority
JP
Japan
Prior art keywords
electric current
zeuner
diode
voltage
sensing circuit
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
JP12075979A
Other languages
Japanese (ja)
Inventor
Yukio Asakawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12075979A priority Critical patent/JPS5644859A/en
Publication of JPS5644859A publication Critical patent/JPS5644859A/en
Pending legal-status Critical Current

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  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE: To sense the correct maximum electric current by taking out polyphase all-wave rectifier output sensing the maximum voltage value, through a Zeuner diode.
CONSTITUTION: Sensing voltage of an electric current sensor 3 which detects a load electric current of DC electric motor 2 is conducted to the input terminals B1WBn of an n-phase allwave rectifier 4. The maximum voltage is added to an impedance 5 through the Zeuner diode 7 and is taken out either between N and C or P and C. A differential beyond the rated electric current is obtained in the output of an insulated amplifier 6 by making the Zeuner voltage of Zeuner diode 7 correspond to the rated electric current of the DC electric motor 2.
COPYRIGHT: (C)1981,JPO&Japio
JP12075979A 1979-09-21 1979-09-21 Sensing circuit of maximum electric current Pending JPS5644859A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12075979A JPS5644859A (en) 1979-09-21 1979-09-21 Sensing circuit of maximum electric current

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12075979A JPS5644859A (en) 1979-09-21 1979-09-21 Sensing circuit of maximum electric current

Publications (1)

Publication Number Publication Date
JPS5644859A true JPS5644859A (en) 1981-04-24

Family

ID=14794282

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12075979A Pending JPS5644859A (en) 1979-09-21 1979-09-21 Sensing circuit of maximum electric current

Country Status (1)

Country Link
JP (1) JPS5644859A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06153303A (en) * 1992-11-09 1994-05-31 Matsushita Electric Ind Co Ltd Leak detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06153303A (en) * 1992-11-09 1994-05-31 Matsushita Electric Ind Co Ltd Leak detector

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