Variants of the auxiliary resonant commutated pole principle are described, aiming at assisting the generation of PWM waveforms with soft transitions in multilevel nested-cell phase legs. Typical merits and demerits of the proposed circuits are addressed. In order to clarify the evolution of the topologies, various steps are discussed starting from a conventional two-level switching leg. Experimental results validate the concepts for a 800 V/100 A/10 kHz three-level nested-cell converter.
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机译：描述了辅助谐振换向极原理的变体，旨在通过多层嵌套单元相臂中的软过渡来辅助PWM波形的生成。提出的电路的典型优缺点被解决。为了阐明拓扑结构的演变，从常规的两级交换支路开始讨论各种步骤。实验结果验证了800 V / 100 A / 10 kHz三电平嵌套单元转换器的概念。
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