AC-DC single phase matrix converter with reduced switch count and unity power factor wave shaping current control loop

This thesis presents the implementation of AC-DC single phase matrix converter with reduced switch count and unity power factor wave shaping current control loop. Basic operation of rectifier by using PWM was used to calculate the switch duty ratio to synthesis the output. Safe commutation strategy was implemented to avoid voltage spikes due to inductive load. The reduce switches were proposed after analyze the all operation in switching scheme; AC state, safe commutation strategy and power factor correction making it less complexity. A current control (CCL) using standard proportional integral control was used to develop power factor correction to correct the pulsating nature of the input current to almost unity power factor form with low total harmonic distortion (THD) level well below the acceptable limit that was defined in the IEEE 519 Std. Active current wave shaping control was used to ensure the supply current waveform could perform corrections making it continuous, sinusoidal and in phase with the voltage supply. Prior to its practical realization a computer simulation model is developed to investigate the behavior of the SPMC using MATLAB/Simulink. Selected simulations results are presented to verify proposed operation.