Pulsewidth Modulation Inverter Drive with Fast Response to Frequency and Amplitude Controls

A pulsewidth modulation (PWM) inverter drive is presented, which uses an original parallel processing technique. The multiplication process of the voltage demand by the instantaneous value of the wave is achieved in time domain using a variable frequency clock. Optimum feedback is used to ensure the accuracy of the analog processing stage, with the result of a rapid and accurate response achieved with a modest component count requiring very little adjustment.