发明名称 |
METHOD AND CIRCUIT ARRANGEMENT FOR PROTECTING AN ELECTRIC MOTOR FROM AN OVERLOAD |
摘要 |
A method and a circuit for protecting an electric motor and/or its trigger circuit against overload in the emergency-operation mode in a motor vehicle direct-current fan motor operated by means of pulse width modulation, in which the trigger circuit is designed as an emergency-operation controller, with a microcontroller preceding the motor end stage and with a comparator assembly for detecting overvoltages. Overload protection is assured at elevated battery voltage and at the same time when the emergency-operation controller is activated in response to malfunctions in the normal triggering of the electric motor. To that end, at least one overvoltage threshold (U<SUB>s1</SUB>, U<SUB>s2</SUB>) is defined; when it is exceeded, the power supplied to the motor is reduced or switched off. |
申请公布号 |
EP1459437(B1) |
申请公布日期 |
2016.07.13 |
申请号 |
EP20020774402 |
申请日期 |
2002.09.24 |
申请人 |
ROBERT BOSCH GMBH |
发明人 |
MOHR, THOMAS;KNAB, NORBERT;EISELE, ALBERT;RAPP, JUERGEN |
分类号 |
H02P3/08;H02P29/02;H02H7/08;H02P7/06 |
主分类号 |
H02P3/08 |
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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