Commutation Problem of Single Phase Matrix Converter with PWM Phase Shift Dead Time Technique

Abstract

The matrix converter can provide both the features variable voltage and variable frequency in single stage without the need of dc-link capacitor. The converter is fed from 50 Hz source supplying the power to RL load. The commutation problem arises due to dead time and overlap time, mainly in high frequency operation, can be handled with the help of RC snubbers circuit and soft commutation strategies. The problem associated such as costly, bulky with RC snubbers and complexity with soft commutation strategies has analyzed by PWM dead time technique. This paper presents the commutation control topology of single phase matrix converter at high frequency operation. The main shortcomings of matrix converter i.e. the commutation is analyzed and simulated using unipolar PWM, bipolar PWM, (with & without) passive filter. Simulation results shows that the performance such as fundamental values, THD have been improved with PWM dead time technique using passive filter as compared to unmodulated converter which can help in industry application requiring the matrix converter.