Improvement of four-step matrix converter based on commutation strategy for two line voltage synthesis
1. School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo, Henan 454000, China; 2. School of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China）
Abstract：Aiming at increasing the safe commutation and improving the quality of output waveform, an improved safe commutation method based on two line voltage synthesis is presented by analyzing the character of traditional four-step commutation. The improved method includes exchanging the switching PWM sequence and introducing variable commutation time four-step commutation strategy. A simplified method of generating PWM pulse is presented on the basis of two line voltage synthesis strategy. Improved commutation strategy can improve the reliability of commutation, decrease the commutation time and simplify the generation of PWM pulse design. Improved commutation strategy can enhance the quality of output waveform and eliminate the fault of short circuit and open circuit. Finally, experiment results demonstrate the availability and reliability of improved commutation strategy of matrix converter based on two line voltage synthesis.
马星河, 谭国俊, 方永丽, 汪旭东, 袁世鹰. 矩阵变换器双电压法四步换流策略的改进[J]. 江苏大学学报（自然科学版）, 2008, 29(1): 61-65.
Ma Xinghe, Tan Guojun, Fang Yongli, Wang Xudong, Yuan Shiying. Improvement of four-step matrix converter based on commutation strategy for two line voltage synthesis[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2008, 29(1): 61-65.
2008, Vol. 29 
