Randomized Pulse Position PWM and Its Realization on Matrix Converter

The matrix converter is a new cycle converter with matrix switch sequences, which has a series of advantages. A novel randomized pulse position PWM based on traditional voltage space vectors is proposed, which is worked on the model of matrix converter. In the strategy, the positions of the zero voltage vectors are randomly changed, and then two PWM modes with low switching losses are selected randomly, which make harmonic that comes from matrix converter distribute in a wider frequency range evenly. This paper illustrates a fast algorithm of SVPWM in the less switching loss mode. S-function models are programmed by means of MATLB, which are combined with the models of power system block in SIMULINK to set up the simulation model. And it produces the better waveform and data by the simulation using the two strategies separately. The simulation results verify the feasibility and the practicability of the novel randomized pulse position PWM.