CONTROL DEVICE AND METHOD FOR AC ROTARY ELECTRICAL MACHINE AND ELECTRICAL POWER STEERING DEVICE

摘要

An AC rotary electrical machine and control device that controls an AC rotary machine is equipped with a plurality of sets of windings and comprises: a plurality of inverters having in each phase a switching element that controls the voltage applied to each phase of the aforementioned winding; current control means that controls the current flowing to the winding and that supplies a voltage instruction value corresponding to the aforementioned voltage to the aforementioned inverters; and fault detection means that detects malfunction representing at least either short circuiting or open circuiting of the aforementioned switching elements. The current control means sets the same potential side of each phase of the malfunctioning inverter to the same condition as the fault in accordance with the fault detected by the fault detection means but continues to perform control of the inverter on the normal side i.e. the side which is not malfunctioning.