摘要
双Buck逆变器(dual buck inverter,DBI)不存在桥臂直通的问题,且功率开关管和续流二极管分离,便于实现续流二极管的最优选取,因此DBI具有可靠性和变换效率方面的优势。但是,传统DBI滤波电感上的电流是半周期正弦波,磁性元件利用率偏低。为了解决这个问题,提出一种三电感DBI(three-inductor DBI,TIDBI),通过从原始的电感中分离出一个交流滤波电感作为主导的滤波电感,并将两个直流滤波电感耦合,从而提高磁性元件的利用率,有效地降低了滤波电感的体积和重量。详细分析TIDBI的工作原理,给出滤波电感的设计原则。最后通过实验结果验证理论分析的正确性。
The Dual-Buck Inverter （DBI） has no shoot-through concerns and the free-wheeling diodes of DBIs can be chosen optimally because of the separation of power switches and freewheeling diodes, so it has great advantages in reliability and efficiency. However, since the current of filter inductors is half cycle sinusoidal wave, the utilization rate of magnetic components is low. In order to overcome the shortcomings, a three-inductor dual-buck inverter （TIDBI） was first proposed in the paper. In the proposed TIDBI, an AC inductor was separated from the primary inductors and severed as a dominant filter inductor. And the two DC filter induct^Srs were coupled together. The proposed TIDBI effectively increases the utilization rate of magnetic components and decreases the volume and weight of the inverter. In this paper, the operating principles of the proposed TIDBI were analyzed in detail. The design guidelines of the filter were given out. Finally, experimental results verified the theoretical analysis.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2014年第21期3413-3422,共10页
Proceedings of the CSEE
基金
国家自然科学基金项目(51007039)~~
关键词
三电感
双BUCK逆变器
滤波电感
耦合电感
three-inductor
dual-buck inverter （DBI）
filter inductor
coupled-inductor
