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发明授权
CN107404236B 功率转换装置及应用了该功率转换装置的电梯装置 有权

功率转换装置及应用了该功率转换装置的电梯装置
摘要：
本发明提供一种具有如下功能且小型化的功率转换装置，即，功率转换用的三相桥臂所使用的功率半导体开关元件一部分发生故障也能继续进行电力提供。在该功率转换装置(100A)中，若逆变器电路(102A)的桥臂(106a)损坏，则信号控制部(240)检测出来自连接点(116e、116f)的电流值并判定为发生异常，通过控制部(240)向第1连接部(141)发送从商用电源(110)切断构成脉宽调制整流电路(101A)的三相桥臂(103a、104a、105a)中的一相的桥臂(105a)的控制指令信号，并向第2连接部(142a)发送控制指令信号，使下述两部位相连接：切断的部位、以及包含损坏的MOSFET(126c、136c)的桥臂(106a)和电动机(120)的连接部位，因此电路(101A)的桥臂(105a)替换发生故障的电路(102A)的桥臂(106a)。
摘要（英）：

The invention provides a power conversion device, which has such functions and is minimized. Even if part of a power semiconductor switch for a three phase bridge arm for power conversion is broken, power supply can be continued. In the power conversion device (100A), if the bridge arm (106a) of an inverter circuit (102A) is broken, a signal control part (110) can detect the current value from a connection point (116e, 116f) and finds the abnormal state, a control command signal is sent to a first connection part (141) through a control part (240) the control command signal is generated by cutting a cameral power supply (110) to form rectifying circuit (101A) of one phase of bridge arm (105a) of three phase bridge arm (103a, 104a, 105a); a control command signal is sent to a second connection part (142a) so as to connect two parts the cut part and the connection part of broken MOSFET (126 c, 136c) of the bridge arm (106a) and a motor (120); and the bridge arm (105a) of the circuit (101A) replaces the bridge arm (106a) of the failure circuit (102A).

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