Normally in the speed control of ac motor we use either voltage controller are variable frequency method to control the speed of motor. By controlling the voltage, we cannot achieve starting torque. In variable frequency method, the voltage is constant so the core loss will be high. To avoid all this loss we need to control the voltage and frequency simultaneously. For this condition, we use pwm sinewave pulse generator integrated circuit. This is very simplest method comparing with other pulse generating method and this method doesn’t need any software program (non-programmed ) configuration.

Keywords - ac motor control, pwm sinewave, non-programmed.;