Concurrent microprocessors-based PWM converter control

Abstract

Fairly sophisticated controls are needed to achieve concurrent multiple objectives of pulse-width-modulation (PWM) converters. The objectives may include near sinusoidal current waveforms, fine dc voltage or current regulation, and specified power factor. The paper describes the application of a system of three high speed digital signal processors to implement these controls in real time. The voltage angle lock loop control of a voltage source (boost-type) converter for high voltage direct current system is presented. Experimental results confirm that the digitally controlled system can realize the full potential oi the PWM converter.