This paper briefly reviews virtual space vector pulse width modulation (VSVPWM) for the diode-clamped multilevel inverter (DCMLI). Based on the universal modulation model of the DCMLI with N-level, a modulation strategy named as full range capacitor voltage balance PWM (FRCVBPWM) is proposed, which has similar capacitor voltage balance characteristics as VSVPWM. The characteristic of FRCVBPWM is that there are respectively zero, N − 1 and N − 2 switching actions for the three phases of the DCMLI. Therefore, the total switching actions are greatly decreased compared with VSVPWM. The switching loss comparison between FRCVBPWM and VSVPWM is conducted by comprehensive simulations. Finally, the feasibility and superiority of FRCVBPWM over VSVPWM is verified by experiments.

中文翻译：

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二极管钳位多电平逆变器的全范围电容器电压平衡PWM策略

本文简要回顾了二极管钳位多电平逆变器（DCMLI）的虚拟空间矢量脉冲宽度调制（VSVPWM）。基于具有N电平的DCMLI的通用调制模型，提出了一种称为全范围电容器电压平衡PWM（FRCVBPWM）的调制策略，其具有与VSVPWM相似的电容器电压平衡特性。FRCVBPWM的特征是，DCMLI的三相分别有零个，N-1个和N-2个开关动作。因此，与VSVPWM相比，总开关动作大大减少。通过全面的仿真对FRCVBPWM和VSVPWM的开关损耗进行比较。最后，通过实验验证了FRCVBPWM优于VSVPWM的可行性和优越性。