This article proposes a new pulse-width modulation (PWM) scheme that reduces common-mode (CM) voltage and switching losses simultaneously in CSI. The proposed PWM (i.e., reduced voltages PWM: RVM) reduces CM voltages and switching losses by selecting the optimal zero current vector and PWM sequence based on the CSI output voltage conditions. This article also proves the proposed RVM achieves both objectives (i.e., reduced CM voltage and switching losses) simultaneously for all CSI operating conditions without compromising the other objective. The proposed RVM inherently achieves zero-voltage switching conditions during the zero current vector transitions, further reducing the switching losses. Experimental results demonstrate significant reductions in CM voltage, reaching up to approximately 95%, accompanied by an increase of up to about 5.5% in CSI efficiency across a wide operating range compared to alternative PWM methods, confirming the predicted advantages of the proposed RVM.

中文翻译：

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用于同时最小化电流源逆变器中的开关损耗和 CM 电压的 PWM


本文提出了一种新的脉宽调制 (PWM) 方案，可同时降低 CSI 中的共模 (CM) 电压和开关损耗。所提出的 PWM（即降压 PWM：RVM）通过基于 CSI 输出电压条件选择最佳零电流矢量和 PWM 序列来降低 CM 电压和开关损耗。本文还证明所提出的 RVM 在所有 CSI 操作条件下同时实现了两个目标（即降低 CM 电压和开关损耗），而不会影响其他目标。所提出的 RVM 在零电流矢量转换期间固有地实现了零电压开关条件，从而进一步降低了开关损耗。实验结果表明，与替代 PWM 方法相比，CM 电压显着降低，达到约 95%，同时在宽工作范围内 CSI 效率提高约 5.5%，证实了所提出的 RVM 的预测优势。