零电压开关多谐振三电平直流变换器

该文提出一族零电压开关多谐振三电平直流变换器(Zero-voltage-switching multi-resonant three-leve lconverters，ZVS-MR-TLCs)，它是在三电平变换器的基础上加入LCC谐振网络实现ZVS，开关管和二极管的结电容以及变压器的漏感被利用。该文以Buck ZVS-MR-TLC为例分析它的工作原理和特性，并与传统的两电平零电压开关多谐振变换器(ZVS-MRC)进行比较。与两电平ZVS-MRC相比，ZVS-MR-TLC功率器件的电压应力降低，实现ZVS的负载范围变宽，滤波电感和滤波电容大大减小。最后给出了实验结果。

ZERO-VOLTAGE-SWITCHING MULTI-RESONANT THREE-LEVEL CONVERTERS

This paper proposes a family of zero-voltageswitching multi-resonant three-level converters (ZVS-MR-TLCs). A LCC multi-resonant network is added to the three-level converters to realize ZVS. The unique arrangement of a multiresonant network results in absorption of all major parasitic components in the resonant circuit, including switch output capacitance, diode junction capacitance and transformer leakage inductance. The proposed converters achieve ZVS in a wider load range, reduce the voltage stress on the switches and with a less significant filter as compared with two-level MRCs. Buck ZVS-MR-TLC is taken as the example to illustrate the operation principle, characteristics and the advantages over the traditional Buck ZVS-MRC. The experimental results are also included in this paper.