SINE TRIANGLE PWM IN SINGLE PHASE SYSTEM

摘要

Embodiments herein disclose a method and a single phase motor for using Pulse Width Modulation (PWM), the method comprising applying a modulating wave to each arm of a drive of the single phase motor, wherein a second modulating wave leads a first modulating wave by 90 degrees and a third modulating wave lags the first modulating wave by 90 degrees; comparing instantaneous magnitude of carrier wave and instantaneous magnitude of the modulating waves on each arm; and switching voltage level at a motor terminal connected to an arm to +Vdc on instantaneous magnitude of the carrier wave being greater than the instantaneous magnitude of the modulating wave on the arm.