A Study on the Efficiency Improvement of Induction Motor with AC Voltage Controller

교류 전압 제어기에 의한 유도전동기의 효율 개선에 관한 연구

This paper proposes a minimum power factor control for maximum efficiency operation of an induction motor, under low load condition. Minimum input or maximum efficiency operation is achived by properly adjusting the amplitude of the stator voltage, with the three phase AC voltage controller. Through the simulation, the relationships between the delay angle and input power under various load conditions are examined. Experimental results are also given, which show good coincidence with the simulation results.