hello, i am making an IGBT driver for 1200V/50A. i am using LPC 1788 to generate PWM . Generating PWM and AMPLITUDE variation was easy. But my main concern is how to vary frequency keeping V/F ratio of the motor constant of an induction motor. Is it possible with the same processor..How to change frequency of PWM.. MY IGBT DRIVER would be able to make my motor work properly up to 100 hz(of sinewave)..