Research on Modulation Strategy of Two-Stage Matrix Converter Based on DSP+CPLD

Aiming at the complexity modulation strategy and commutation problem of conventional matrix converter(CMC),this paper researches a kind of two-stage matrix converter(TSMC),which can retain the same performance as CMC but overcome its disadvantages.This paper deduces modulation strategy of TSMC,analyzes its zero current commutation principle and gives the experimental setup.At last,an experimental prototype is established based on DSP+CPLD,The experimental results indicate that the input and output electric currents are the sinusoidal wave and the unit is the input power factor.