JPS5755787A - Malfunction preventing device - Google Patents

Malfunction preventing device

Info

Publication number
JPS5755787A
JPS5755787A JP55132061A JP13206180A JPS5755787A JP S5755787 A JPS5755787 A JP S5755787A JP 55132061 A JP55132061 A JP 55132061A JP 13206180 A JP13206180 A JP 13206180A JP S5755787 A JPS5755787 A JP S5755787A
Authority
JP
Japan
Prior art keywords
transistor
trouble
alarm
motor
short 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
JP55132061A
Other languages
Japanese (ja)
Inventor
Yasushi Tanaka
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP55132061A priority Critical patent/JPS5755787A/en
Publication of JPS5755787A publication Critical patent/JPS5755787A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements

Landscapes

  • Emergency Alarm Devices (AREA)
  • Control Of Electric Motors In General (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

PURPOSE:To prevent the malfunction under the state of trouble, by a method wherein a resistance element with non-linear temperature characteristics is connected to a motor driving transistor so that an alarm signal is generated by the operation of a detecting circuit when a short circuit trouble of the transistor occurs. CONSTITUTION:A motor M, a driving transistor Tr1 and a thermal fuse F which consists of a resistance element with non-linear temperature characteristics are connected to a source 2 in series and the base of Tr1 is connected to a signal input terminal 1. When a short circuit failure of Tr1 occurs the potential of a junction A is elevated by the thermal fuse F, a transistor Tr3 of a detecting circuit 3 is ON and a transistor Tr4 is ON by transmitting a signal into the signal input terminal 1 so that an alarm 5 of an alarm circuit 4 is put into operation. With above method, power consumption produced by the trouble is eliminated and the short circuit of the driving transistor Tr1 is detected positively, so that the motor M is prevented from malfunctioning.
JP55132061A 1980-09-22 1980-09-22 Malfunction preventing device Pending JPS5755787A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55132061A JPS5755787A (en) 1980-09-22 1980-09-22 Malfunction preventing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55132061A JPS5755787A (en) 1980-09-22 1980-09-22 Malfunction preventing device

Publications (1)

Publication Number Publication Date
JPS5755787A true JPS5755787A (en) 1982-04-02

Family

ID=15072589

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55132061A Pending JPS5755787A (en) 1980-09-22 1980-09-22 Malfunction preventing device

Country Status (1)

Country Link
JP (1) JPS5755787A (en)

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