Design and implementation of a PWM rectifier using MCT for DC motor load

The lower on state voltage drop along with high dv/dt, di/dt are some of the attractive features which makes MCT the most suitable device for motor drive application. A simple PWM scheme for half controlled MCT based AC/DC converter has been suggested. This pulse pattern has been optimised to contain simultaneously the minimum amount of input current and output voltage harmonics while at the same tune it is simple to implement as compared to similar other schemes. An analytical simulation has been carried out for this converter with DC motor load. The simulation results shows that the converter input performances like power factor and harmonic factor are relatively good. The output performance parameters like the ripple factor and peak factor are comparatively improved as compared to the published work. A MCT based converter with three phase input and the proposed control strategy has been assembled and tested in the laboratory to check the validity of its implementation. The overall converter performance has been found to be satisfactory. Some of the essential waveforms obtained from the experimental set up are shown in this paper.