JPS56130904A - Defect detecting circuit for constant-current controlled coil driving circuit - Google Patents

Defect detecting circuit for constant-current controlled coil driving circuit

Info

Publication number
JPS56130904A
JPS56130904A JP3538180A JP3538180A JPS56130904A JP S56130904 A JPS56130904 A JP S56130904A JP 3538180 A JP3538180 A JP 3538180A JP 3538180 A JP3538180 A JP 3538180A JP S56130904 A JPS56130904 A JP S56130904A
Authority
JP
Japan
Prior art keywords
defect
logic
detecting circuit
flop
flip
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
JP3538180A
Other languages
Japanese (ja)
Inventor
Shigeo Sakaba
Hiroshige Nakano
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.)
Koki Holdings Co Ltd
Original Assignee
Hitachi Koki Co 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 Koki Co Ltd filed Critical Hitachi Koki Co Ltd
Priority to JP3538180A priority Critical patent/JPS56130904A/en
Publication of JPS56130904A publication Critical patent/JPS56130904A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
    • G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

PURPOSE:To inexpensively provide a defect detecting circuit by providing counting for counting the number of output pulses from an error amplifier and discriminating a defect when the counted value is less than predetermined value. CONSTITUTION:A flip-flop 12 generates one logic ''1'' signal at its output terminal when the one or more of the output pulses are generated from an error amplifier 5, and a flip-flop 13 generates one logic ''1'' signal when two or more of the output pulses are generated from the error amplifier 5. When the coil driving circuit is normal, the amplifier 5 generates more than two of the voltage pulses while the coil drive signal is logic ''1''. If a transistor 1 is, for example, broken down, the output of the amplifier 5 becomes one voltage pulse. Accordingly, an AND gate 15 will generate a logic ''1'' signal representing the defect to set the flip-flop 16 and to thus detect and store the defect. Thus, the inexpensive detecting circuit can be provided.
JP3538180A 1980-03-18 1980-03-18 Defect detecting circuit for constant-current controlled coil driving circuit Pending JPS56130904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3538180A JPS56130904A (en) 1980-03-18 1980-03-18 Defect detecting circuit for constant-current controlled coil driving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3538180A JPS56130904A (en) 1980-03-18 1980-03-18 Defect detecting circuit for constant-current controlled coil driving circuit

Publications (1)

Publication Number Publication Date
JPS56130904A true JPS56130904A (en) 1981-10-14

Family

ID=12440312

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3538180A Pending JPS56130904A (en) 1980-03-18 1980-03-18 Defect detecting circuit for constant-current controlled coil driving circuit

Country Status (1)

Country Link
JP (1) JPS56130904A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0701261A1 (en) * 1994-09-06 1996-03-13 Motorola, Inc. Circuit and method of detecting actuator movement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0701261A1 (en) * 1994-09-06 1996-03-13 Motorola, Inc. Circuit and method of detecting actuator movement

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