全桥三电平变换器的一种新型控制策略  

A NOVEL DOUBLE PHASE-SHIFT CONTROL SCHEME FOR FULL-BRIDGE THREE-LEVEL CONVERTER

作　　者：张之梁[1] 阮新波[1] 

机构地区：[1]南京航空航天大学航空电源重点实验室,江苏省南京市210016

出　　处：《中国电机工程学报》2005年第19期19-24,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50177013)。~~

摘　　要：对全桥三电平变换器提出了一种新的脉宽调制控制策略——双移相(Double phase-shift,DPS)控制。对比斩波加移相(Chopping plus phase-shift,CPS)控制,该控制策略大大减小开关管体二极管的损耗,使全桥三电平变换器可以工作在三电平模式和两电平模式,从而提高了变换器的效率。同时保持开关管的电压应力只有输入电压的一半,使该变换器非常适合高压输入的场合,并实现所有开关管的零电压开关。此外,全桥三电平变换器输出滤波电感比传统全桥变换器也大为减小。副边整流二极管的电压应力得到了降低。由于变换器的输入电流纹波很小,输入滤波器也得到了减小。本文详细分析全桥三电平变换器在双移相控制策略下的工作原理,讨论参数设计,并且给出实验结果。A novel “double phase-shift （DPS）” control for full-bridge （FB） three-level （TL） converter is proposed, which improves efficiency by reducing losses of switches＇ body diodes meanwhile maintains the converter＇s original advantages without adding additional components compared with “chopping plus phase-shift （CPS）” control. Furthermore, the voltage stress of the main switches is only half of the input voltage, which makes it very suitable in high input voltage applications. Compared with traditional FB converter, the output filter inductance of FB TL converter is significantly reduced due to lower high-frequency content of the secondary rectified voltage. Additionally the input current of the converter has quite little ripple, the input filter can be reduced. The operation principle is verified on 3kW, 100kHz prototype.

关 键 词：电力电子 三电平变换器 全桥变换器 移相控制 软开关 

分 类 号：TM311[电气工程—电机]