发明名称 |
Overcurrent protection apparatus for DC motor |
摘要 |
An overcurrent protection apparatus for a DC motor which can be used with a speed control system of a DC motor to prevent an overcurrent condition arising when the DC motor is run with a heavy load or locked by an overload from burning or overheating windings of the motor. The apparatus is constructed using at least one integrated circuit and includes a current mirror circuit for detecting an overcurrent and for cutting off the supply current of the DC motor. A timing circuit prevents overcurrents lasting only a short time from triggering the apparatus to shut down the motor. Once the apparatus is triggered to shut off the motor, the motor will remain off for an indefinite period of time until the apparatus is reset.
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申请公布号 |
US4473856(A) |
申请公布日期 |
1984.09.25 |
申请号 |
US19810335358 |
申请日期 |
1981.12.29 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
TAKAHASHI, KENICHIROH;NAKANO, HIROMITSU;YOSHIDA, ISAO |
分类号 |
H02H7/085;H02H3/093;H02H7/08;(IPC1-7):H02H7/08 |
主分类号 |
H02H7/085 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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