Adjustable switched capacitor control for a single-phase induction motor

This paper presents a new method to achieve a maximum torque for a single-phase induction motor. An AC adjustable capacitor which uses an electronic switch in parallel with a capacitor is proposed. The capacitor is short-circuited in a different period by an electronic switch during each cycle to vary the effective value of the AC capacitor. Two new optimization algorithms to obtain a maximum starting torque by adjusting the effective capacitor are proposed. No starting capacitor or centrifugal switch are used. A theoretical analysis, and simulated and experimental results are presented in this paper