具有单辅助开关的谐振直流环节逆变器  

Resonant DC Link Inverter with a Single Auxiliary Switch

作　　者：王强[1] 刘岩松[1] 陈祥雪 王天施[1] 刘晓琴[1] 

机构地区：[1]辽宁石油化工大学信息与控制工程学院,辽宁抚顺113001

出　　处：《电子学报》2014年第11期2321-2324,共4页Acta Electronica Sinica

基　　金：国家自然科学基金(No.51207069);中国博士后科学基金面上项目(No.2013M531349);辽宁省教育厅科研项目(No.L2013146);江苏省博士后科研资助计划项目(No.1301105C)

摘　　要：为实现一种结构简单、控制方便、高效率、高功率密度的逆变器,提出了一种新型谐振直流环节软开关逆变器的拓扑结构.通过在传统硬开关逆变器的直流环节添加辅助谐振单元,使直流母线电压周期性地归零,可以实现逆变桥主开关器件的零电压开关,而且辅助开关器件可以实现零电流开通和零电压关断.此外,其辅助谐振单元只有一个辅助开关器件,所以该逆变器控制相对简单,硬件成本低.对其工作原理进行分析,给出不同工作模式下的等效电路图和软开关的实现条件.制作一个1k W的实验样机,通过实验结果验证该软开关逆变器的有效性.A resonant DC link soft-switching inverter was proposed to realize an inverter which has a simple topology,an easy control strategy,high efficiency and high power density. Auxiliary resonant unit was added to DC link of conventional inverter to make DC-bus voltage decrease to zero periodically,which realized zero-voltage operation of all switching devices in inverter. Furthermore,the switching device in the auxiliary resonant unit could be turned on under zero-current and turned off under zero-voltage. In addition,because only one auxiliary switch was in the auxiliary resonant unit,control strategy was relatively simple and cost of hardware was lower. The operation principle was analyzed. The equivalent circuits at different operation modes and conditions for realization of soft-switching were presented. A 1k W laboratory prototype had been built. Experimental results were proposed to confirm validity of soft-switching inverter presented.

关 键 词：谐振 零电压开关 单辅助开关 软开关 逆变器 

分 类 号：TM464[电气工程—电器]