Carrier Loss of Induction Motors Driven by Inverters

—Comparison between Results Separated by Experiment and Field Analysis—

Abstract

In this study, we investigate the carrier loss of induction motors driven by PWM inverters from the results of both the experiment and the electromagnetic field analysis. In the experiment, the motor is driven by the PWM inverter as well as a sinusoidal power supply. The carrier loss is obtained from the increase in the losses. The electromagnetic field analysis is carried out by considering the skin effect of the electrical steel sheet applied to the core. The measured and calculated results are found to be in good agreement. It is clarified that the main component of the carrier loss is the harmonic core losses and that consideration of the skin effect in the core is indispensable to the accurate calculation of the carrier loss.