发明名称 |
Detection of vibration in an AC traction system |
摘要 |
An electric powered vehicle includes a traction motor powered from a source of switched DC power. The motor includes a tachometer for measuring the rotational velocity of the motor and for providing a tachometer signal indicative thereof. A low pass filter low pass filters the tachometer signal and produces a reference tachometer signal. A summing circuit combines the tachometer signal and the reference tachometer signal to produce a deviation signal. The deviation signal is provided to a signal processing circuit which includes a comparator and a reference value generator. The comparator compares the output of the summing circuit to a reference value provided by the reference value generator and produces a binary changing signal as a function of the comparison. A controller, which controls the rate DC power is switched to the motor, accumulates a count of the comparator signals over a predetermined interval and terminates the provisioning of power to the motor if the accumulated count exceeds a predetermined value.
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申请公布号 |
US5902342(A) |
申请公布日期 |
1999.05.11 |
申请号 |
US19970829328 |
申请日期 |
1997.03.27 |
申请人 |
ABB DAIMLER-BENZ TRANSPORTATION (NORTH AMERICA) INC. |
发明人 |
MISHRA, AJAY P. |
分类号 |
B60L9/00;B60L9/22;(IPC1-7):G06G7/76;G06F7/70 |
主分类号 |
B60L9/00 |
代理机构 |
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代理人 |
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地址 |
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