JPS5775586A - Overcurrent protecting circuit for dc motor - Google Patents
Overcurrent protecting circuit for dc motorInfo
- 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
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.
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) |
-
1980
- 1980-10-27 JP JP55149478A patent/JPS5775586A/en active Pending
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