面向三相四电平逆变器的直流侧电容电压平衡不连续脉宽调制技术

Compared with three-level inverters, four-level inverters need more switching times to balance the dc-link capacitor voltages, lowering the efficiency. This article proposes a four-level discontinuous pulsewidth modulation (4L-DPWM) to reduce the switching loss of inverters by clamping the switching state of one phase, and the dc-link capacitor voltage balancing is achieved as well. First, the sub...