发明名称 |
Circuit for monitoring the voltage stress of a capacitor |
摘要 |
A circuit for monitoring the voltage stress of a capacitor which produces an over-stress indicator signal responsive to the over-voltage history of the capacitor. If the measured voltage stress of the capacitor exceeds a predetermined over-voltage value, a characteristic-curve generator, having a predetermined transfer function, produces an output signal which is responsive to the measured voltage stress of the capacitor and the transfer function of the characteristic-curve generator. This signal is combined with a further signal which is responsive to a predetermined permissible continuous operation voltage value. The combined signals are conducted to an integrator having a predetermined integration time constant for producing an overload signal. The overload signal at the output of the integrator is a measure of the state of stress of the capacitor. Circuitry may be provided for disconnecting the capacitor from a transmission line in response to the output signal of the integrator. Also, plural capacitor voltage stress monitoring stages may be combined to monitor the capacitor voltage stress in a plurality of over-voltage ranges.
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申请公布号 |
US4326230(A) |
申请公布日期 |
1982.04.20 |
申请号 |
US19800165809 |
申请日期 |
1980.07.03 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
BECKER, MICHAEL;RENZ, KLAUS;WEIBELZAHL, MANFRED;FENDT, ALFONS;POVH, DUSAN;SCHUCH, GERHARD;WALDMANN, HERMANN |
分类号 |
H02H3/50;H02H7/16;(IPC1-7):H02H7/16 |
主分类号 |
H02H3/50 |
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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