JPS5775586A - Overcurrent protecting circuit for dc motor - Google Patents

Overcurrent protecting circuit for dc motor

Info

Publication number
JPS5775586A
JPS5775586A JP55149478A JP14947880A JPS5775586A JP S5775586 A JPS5775586 A JP S5775586A JP 55149478 A JP55149478 A JP 55149478A JP 14947880 A JP14947880 A JP 14947880A JP S5775586 A JPS5775586 A JP S5775586A
Authority
JP
Japan
Prior art keywords
breaker
power source
circuit
motor
ward
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
JP55149478A
Other languages
Japanese (ja)
Inventor
Katsuo Kobari
Keiji Sakamoto
Yoshiaki Hachisuga
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.)
Fanuc Corp
Original Assignee
Fanuc Corp
Fujitsu Fanuc 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 Fanuc Corp, Fujitsu Fanuc Ltd filed Critical Fanuc Corp
Priority to JP55149478A priority Critical patent/JPS5775586A/en
Publication of JPS5775586A publication Critical patent/JPS5775586A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/021—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order
    • H02H3/023—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order by short-circuiting

Landscapes

  • Control Of Direct Current Motors (AREA)

Abstract

PURPOSE:To protect a DC motor against an overcurrent effectively with a simple circuit configuration by providing a current breaker between a power source and a Ward-Leonard circuit and shortcircuitting and breaking the breaker against the power source with the overcurrent detection signal. CONSTITUTION:A current breaker 2 such as a fuse or the like is connected in series between a DC power source 1 and a Ward-Leonard circuit in a circuit for controlling with a chopper a DC motor M by forming a Ward-Leonard circuit in combination of four transistors Q1-Q4 and four diodes D1-D4 in a bridge. Further, there are provided a commutation unit 3 for shortcircuitting the breaker to the power source 1 and a current detector r2. The detection signal from the detector r2 is compared by a comparator 4, and the unit 3 is conducted when excessive current is detected to break the breaker 2.
JP55149478A 1980-10-27 1980-10-27 Overcurrent protecting circuit for dc motor Pending JPS5775586A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55149478A JPS5775586A (en) 1980-10-27 1980-10-27 Overcurrent protecting circuit for dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55149478A JPS5775586A (en) 1980-10-27 1980-10-27 Overcurrent protecting circuit for dc motor

Publications (1)

Publication Number Publication Date
JPS5775586A true JPS5775586A (en) 1982-05-12

Family

ID=15476021

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55149478A Pending JPS5775586A (en) 1980-10-27 1980-10-27 Overcurrent protecting circuit for dc motor

Country Status (1)

Country Link
JP (1) JPS5775586A (en)

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