Research On Control Strategies And Commutation Methods Of Matrix-Converter

In this paper, the methods of voltage control and current control for matrix converter (MC) is described. Based on the investigation with several voltage control methods, such as Venturini method, Instantaneous Double-Voltage Synthesis method and Vector Space Modulation method (SVM), Vector Modulation method (SVM), new control strategies are put forward. Firstly, a matrix-varying modulation coefficient SVM method is proposed to improve MC's anti-disturbance performance under the asymmetry input voltage. The Vector Space Modulation method is verified by Matlab/Simulink. Secondly, a switching sequence is presented for MC controlled by the SVM method, which reduces the commutation number and switching losses remarkably. I also study the Commutation methods of MC. Based on four-step current commutation and two-step current commutation, new commutation method is put forward. This method need auxiliary switches and dead-time commutation, using Matlab/Simulink to verify it.