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DEVICE AND METHOD FOR DETECTING FAULT OF STATOR WINDINGS OF INVERTER-FED AC MOTOR
DEVICE AND METHOD FOR DETECTING FAULT OF STATOR WINDINGS OF INVERTER-FED AC MOTOR
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机译：交流电机定子绕组故障检测装置及方法
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摘要
A method and a device for detecting a fault of a stator winding of an inverter-fed AC motor are provided to minimize damage due to an insulation breakdown by quickly detecting a disconnection in the stator winding. An AC motor includes a first phase winding, a second phase winding, and a third phase winding. Capacitors(C1,C2) are included in an inverter for driving the AC motor. A DC voltage is applied across the capacitors. Two resistors(R1,R2) are series-connected to each other. The resistors are parallel-connected to both ends of the capacitors. A zero phase voltage is obtained by measuring a potential difference between a node n between the resistors and a neutral point S of the windings of the AC motor. When the zero voltage is not zero, a defect of the stator winding is determined.
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