JPS5785593A - Chopper controlling circuit - Google Patents

Chopper controlling circuit

Info

Publication number
JPS5785593A
JPS5785593A JP16073680A JP16073680A JPS5785593A JP S5785593 A JPS5785593 A JP S5785593A JP 16073680 A JP16073680 A JP 16073680A JP 16073680 A JP16073680 A JP 16073680A JP S5785593 A JPS5785593 A JP S5785593A
Authority
JP
Japan
Prior art keywords
time
circuit
chopper circuit
protecting
chopper
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
JP16073680A
Other languages
Japanese (ja)
Inventor
Shigeru Kuriyama
Susumu Shiba
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 JP16073680A priority Critical patent/JPS5785593A/en
Publication of JPS5785593A publication Critical patent/JPS5785593A/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

Abstract

PURPOSE:To enable the detection of a commutation failure from the terminal voltage of a chopper circuit and to prevent the erroneous operation at the starting or stopping time by stopping the operation of a protecting circuit of the chopper circuit for the predetermined period of time from the time when a start contact is closed. CONSTITUTION:When a start switch 7-1 is thrown in a controlling circuit for controlling the speed of a DC motor 4 via a chopper circuit 5, a contactor coil 8 is energized from a transistor TR9 via TR2 to throw a start contactor. Simultaneously, a time limiter having a capacitor C8 and an OPAMP2 is energized, a collector current is supplied to the transistor TR1 of a protecting circit after the predetermined period of time set by the limiter, and the protecting circuit is operated. Further, a diode D3 for detecting the commutation failure is connected to the positive electrode side of the chopper circuit.
JP16073680A 1980-11-17 1980-11-17 Chopper controlling circuit Pending JPS5785593A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16073680A JPS5785593A (en) 1980-11-17 1980-11-17 Chopper controlling circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16073680A JPS5785593A (en) 1980-11-17 1980-11-17 Chopper controlling circuit

Publications (1)

Publication Number Publication Date
JPS5785593A true JPS5785593A (en) 1982-05-28

Family

ID=15721338

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16073680A Pending JPS5785593A (en) 1980-11-17 1980-11-17 Chopper controlling circuit

Country Status (1)

Country Link
JP (1) JPS5785593A (en)

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