(EN) This invention makes it such that even if a malfunction occurs in a motor drive circuit, drive control of a polyphase electric motor can be continued without an electromagnetic brake acting on said electric motor. This invention includes a main motor drive circuit that performs drive control for the aforementioned polyphase electric motor, a backup motor drive circuit that performs drive control for said polyphase electric motor if a malfunction occurs in the main motor drive circuit, and a malfunction diagnosis unit that diagnoses malfunctions in the main motor drive circuit and the backup motor drive circuit. This invention has a normal drive state in which the polyphase electric motor is driven by the main motor drive circuit alone and a backup drive state in which, if the result of a diagnosis performed on the main motor drive circuit by the malfunction diagnosis unit indicates a malfunction in said main motor drive circuit when in the aforementioned normal drive state, motor current from the malfunctioning phase output unit is interrupted and the polyphase electric motor is driven by switching from the interrupted phase output unit to the phase output unit for the same phase in the backup motor drive circuit.
(ZH) 本发明的电动机控制装置（100）包括电动机（10）、控制装置（40）和电动机驱动电路（50）。电动机（10）包括：电动机转子（20）；电动机定子（30）；以及多个线圈组，其按三相至少分成第一线圈组（G1）和第二线圈组（G2）的两个系统，并用三相交流对定子铁芯（31）进行励磁。电动机驱动电路（50）中，第一电动机驱动电路（50A）基于指令值将三相交流的第一电动机驱动电流供给到第一线圈组（G1），第二电动机驱动电路（50B）将相对于第一电动机驱动电流的相位具有相位差的三相交流的第二电动机驱动电流供给到第二线圈组（G2）。
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