Control Device And Method For Electric Motor Electric Motor Using Same And Vehicle Drive System

Abstract: A control device for an electric motor which controls the operation of an electric motor by outputting a PWM signal to a switching element forming an inverter the control device being provided with: a voltage command generation unit (21) which generates as voltage commands (Vu* Vv* Vw*) superimposed wave signals wherein the tertiary harmonic wave of a sine wave is superimposed on said sine wave which has an inverter output frequency (FINV) as the fundamental frequency thereof; and a PWM signal generation unit (23) which generates PWM signals (U V W X Y Z) by means of a magnitude comparison between a voltage command output by the voltage command generation unit (21) and a carrier signal (CAR) output by an asynchronous carrier signal generation unit (22).

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