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三电感双Buck逆变器

DOI: 10.13334/j.0258-8013.pcsee.2014.21.003, PP. 3413-3422

Keywords: 三电感,双Buck逆变器,滤波电感,耦合电感

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Abstract:

双Buck逆变器(dualbuckinverter,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-inductorDBI,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。

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