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    • 5. 发明授权
    • Apparatus and method for detecting abnormality of high voltage circuit
    • 高压电路异常检测装置及方法
    • US08749247B2
    • 2014-06-10
    • US13391718
    • 2010-09-09
    • Yuuichi HaraNoriko HoshinoTsuyoshi Morita
    • Yuuichi HaraNoriko HoshinoTsuyoshi Morita
    • G01R31/14
    • G01R31/025B60L3/0023B60L3/0069G01R31/006
    • Disclosed are abnormality detecting apparatus and method for a high-voltage circuit (A), in which: a square wave pulse is outputted to a measuring point (p1) with a switch (SW1) set off, the switch (SW1) provided between an inverter circuit (2) and the ground, a difference voltage (Vp-p) between a voltage (Vh) detected at a phase of T/2 and a voltage (V1) detected at a phase of T is obtained, the occurrence of a ground fault is detected based on the size of the difference voltage (Vp-p); and the square wave pulse is outputted to the measuring point (p1) with the switch (SW1) set on, and it is judged that a loosening of a fastening section (p2) occurs when the difference voltage (Vp-p) exceeds a reference voltage (Vref2).
    • 本发明公开了一种高压电路(A)的异常检测装置和方法,其中:在开关(SW1)断开时,将方波脉冲输出到测量点(p1),开关(SW1)设置在 逆变器电路(2)和接地,获得在T / 2相检测的电压(Vh)与在相位T检测的电压(V1)之间的差电压(Vp-p),发生 基于差分电压(Vp-p)的大小检测接地故障; 并且方波脉冲被输入到测量点(p1),开关(SW1)置于开,并且当差值电压(Vp-p)超过参考值时,判断为紧固部分(p2)松动 电压(Vref2)。