Adjustable-speed single-phase induction motor drive

This paper investigates the performance of adjustable-speed drive systems based on start-capacitor (SC) and split-phase capacitor (SPC) single-phase motors. It is demonstrated that operating single-phase motors in two-phase mode contributes to an increase in the motor torque, reduces the torque pulsation and provides smooth start-up currents. Simulation results for SC and SPC motor as well as experimental results for an adjustable-speed drive based on a SC motor are presented and demonstrate the performance, correctness and feasibility of the proposed solution.