A new quasi-resonant DC link topology for soft switching of voltage-source inverter

IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03. Pub Date : 2003-06-15 DOI:10.1109/PESC.2003.1218111

C. Attaianese, G. Tomasso

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引用次数: 1

Abstract

Pulsewidth modulated voltage source inverter can be easily controlled in such a way as to achieve the desired value of the output voltage and/or current, but they exhibit high switching losses when operated at high switching frequencies. Besides, relevant electromagnetic interferences can be produced because of the high di/dt and dv/dt in the converter waveforms. These problems can be partially or totally eliminated if the converter switches are commutated at zero voltage and/or zero current. This is achieved by means of suitable tuned LC resonant circuits. In this paper, a novel topology of quasi-resonant DC link for soft switching of VSI is proposed. It is based on two resonant circuits: a main one, which makes the voltage oscillating around the main DC bus voltage, and which is commutated at zero current, and an auxiliary circuit which is enabled to drive the DC voltage to zero just when an inverter switch commutation occurs. Dead time imposition is fully taken into account. A detailed experiment investigation has been performed for validating the proposed scheme.

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一种用于电压源型逆变器软开关的新型准谐振直流链路拓扑

脉宽调制电压源逆变器可以很容易地控制，以达到输出电压和/或电流的期望值，但它们在高开关频率下工作时表现出高开关损耗。此外，由于变换器波形的高di/dt和dv/dt会产生相应的电磁干扰。如果转换器开关在零电压和/或零电流下换向，这些问题可以部分或完全消除。这是通过适当的调谐LC谐振电路实现的。本文提出了一种用于VSI软开关的准谐振直流链路拓扑结构。它基于两个谐振电路:一个主电路，它使电压围绕主直流母线电压振荡，并在零电流时换相;一个辅助电路，当逆变器开关发生换相时，使直流电压驱动为零。完全考虑了死期强制征收。为了验证所提出的方案，进行了详细的实验研究。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.

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