A feed-forward compensation strategy of SPWM Matrix Converter under abnormal input voltage conditions

The feed-forward control scheme based on SPWM matrix converter is proposed. As a device without DC line, the AC line side abnormal inputs can deteriorate its output characteristics. Tri-carrier is prior modulated by measured envelop of line voltages, to let the pulse width of SPWM get different compensation in each pulse. This paper analyzes compensation principle, introduces realization method, and compares output behaviors of without compensation with compensation by Matlab/Simulink. Analyses and simulations show that the scheme modifies effectively output characteristics of MC (Matrix Converter) under abnormal input conditions. It is simple not only easy to realize through hardware but also to digital, and simple algorithm.