一种消除三相隔离式AC-DC矩阵变换器稳态直流偏置的新型伏秒自平衡SVPWM方案

For a three-phase isolated ac-dc matrix converter, the slight volt-second imbalance caused by variable input voltage is an inherent defect and has been neglected in most PWM schemes. The analysis in this paper shows that the imbalance lies in a single direction during the entire input cycle, and it might generate a large dc bias to severely decrease the efficiency of the steady-state operation. Th...