摘要
该文提出一种零电压零电流开关PWM复合式全桥三电平变换器,该变换器的一个桥臂为三电平桥臂,其开关管的电压应力为输入电压的一半,可在很宽的负载范围内实现零电压开关,可以选用场效应管(MOSFET);另一个桥臂为两电平桥臂,其开关管电压应力为输入电压,可在很宽的负载范围内实现零电流开关,可以选用IGBT。该变换器的输出整流电压交流分量很小,可以减小输出滤波器,改善变换器的动态特性。其输入电流脉动很小,可以减小输入滤波器。该文详细分析该变换器的工作原理,讨 论参数设计,并且给出实验结果。
This paper proposes a zero-voltage and zero-current-switching PWM hybrid full-bridge three-level converter (ZVZCS PWM H-FB TL converter), which has a three-level leg and a two-level leg. The voltage stress of the switches of the three-level leg is half of the input voltage, and the switches can realize ZVS in a wide load range, so MOSFET can be adopted; The voltage stress of the switches of the two-level leg is the input voltage, and the switches can realize ZCS in a wide load range, so IGBT can be adopted. The secondary rectified voltage is a three-level waveform having lower high-frequency content compared with that of the traditional full-bridge converters, which can reduce the output filter, and as a result, the dynamic response of the converter is improved. The input filter can also be significantly reduced due to the little ripple of the input current. The operation principle of the proposed converter is analyzed and verified by the experimental results.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2003年第4期9-14,共6页
Proceedings of the CSEE
基金
国家自然科学基金项目(50177013)
