An experimental evaluation of the effect of voltage distortion on the performance of induction motors

摘要

A variable frequency drive operated motor was used to inject harmonics onto a bus bar on which a smaller line connected test motor is operating. The effect of voltage distortion on the operation of each test motor is investigated by measuring their operating efficiency. The motors tested comprise integral horsepower three phase motors of EPACT and NEMA Premium design as well as single phase motors. It was verified that distortion levels of about 8%THD have negligible effect on the operation of both the integral and single phase motors.