EFFECT OF FERRITE MAGNETIC WEDGE ON CHARACTERISTICS OF CAPACITOR MOTOR UNDER ASYMMETRICAL VOLTAGE APPLICATION

The characteristics of the capacitor motor under voltage control are highly applicable to home electric appliances. In this study, the supply voltage controlled by a triac has been applied to a split-phase capacitor motor. The capacitor motor usually produces an oscillative torque with a double supply frequency. When asymmetrical voltages controlled by the triacs are applied to the motor, the voltage and current behaviors are distorted. The authors have proposed a countermeasure of the insertion of ferrite magnetic wedges into the motor slot openings to smooth the Aux density pulsation across the air gap. As a result, some significant relationships have been obtained.