辅助谐振极逆变器缓冲回路能耗最小化改进控制策略  

A Modified Control Strategy of Loss Minimization in the Snubber Circuit for Auxiliary Resonant Commutated Pole Inverters

作　　者：褚恩辉[1] 毋勐漾[1] 

机构地区：[1]东北大学信息科学与工程学院,辽宁省沈阳市110819

出　　处：《中国电机工程学报》2013年第12期90-98,190,共9页Proceedings of the CSEE

基　　金：教育部中央高校基础研究基金(N100404015)~~

摘　　要：针对辅助谐振变换极型逆变器在换流时缓冲回路损耗大这一问题,在一种改进型谐振极逆变器的基础上提出一种改进控制策略。与原控制策略相比,该控制策略不仅能够实现所有主、辅开关管的软开关,而且可将换流时流过缓冲回路的电流最大值控制在换流时刻的负载电流值,避免换流时缓冲回路的谐振电流与换流时刻的负载电流相叠加,从而可有效降低缓冲回路在换流时的环流损耗以及辅助管的电流应力。在改进控制策略下,根据不同工作模式下的等效电路图,分析该逆变器的工作原理、软开关实现条件以及最佳参数设计方法。最后使用IGBT作为开关器件制作一台10kW、16kHz样机,通过实验验证该控制策略的有效性。Aiming at overcoming the problem that the snubber circuit of auxiliary resonant commutated pole （ARCP） inverters has a high loss in commutation process, this paper proposed a modified control strategy based on an improved ARCP inverter. In comparison with previous control strategy, this control strategy can not only realize soft-switching for all switches, but also avoid superposition of the resonant current and the load current at the commutation moment in the snubber circuit and make the maximum snubber circuit current approach to the load current in commutation process. So the circumfluence loss in the snubber circuit and the current peak stress in auxiliary switches can be reduced deeply. According to the equivalent circuit in different operation modes under the control strategy, this paper analyzed the operation principle, soft-switching conditions and optimal parameter design procedure of the improved ARCP inverter. Finally, the modified control strategy has been applied to an 10 kW-16 kHz improved ARCP inverter with IGBT-based switches. Experimental results are given to demonstrate the validity and features of the inverter under this control strategy.

关 键 词：谐振极逆变器 缓冲回路 软开关 零电压开关 控制策略 

分 类 号：TM464[电气工程—电器]