Honda Motor Co., Ltd.

Takeo Saito

Yasuhiko Kondo

A control device of a rotary electric machine capable of preventing occurrence of electrical resonance when a conversion operation abnormality of a DC voltage converter occurs is provided. In a case that the DC voltage converter stops a conversion operation and the conversion operation abnormality that input/output voltages become equal occurs, when a vehicle speed proportional to an electric motor rotation number exceeds a torque limit start vehicle speed, i.e., when the electric motor rotation number exceeds a torque limit start rotation number, a torque limit control for limiting an output torque of the electric motor is executed. The torque limit start vehicle speed is set to a vehicle speed corresponding to a lower limit frequency of a predetermined frequency range where there is a high likelihood of an electrical resonance occurring in the DC voltage converter when the conversion operation abnormality occurs.

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Saitama, Japan

Takeo Saito