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DCM模式下交错并联磁集成双向DC/DC变换器的稳态性能分析

, PP. 60-70

Keywords: 双向DC/DC变换器,交错并联磁集成,耦合电感,稳态性能,DCM模态

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Abstract:

针对目前交错并联磁集成双向DC/DC变换器工作在DCM模态下的分析不全面这一研究现状,以两相电感进行耦合的两相交错并联磁集成Buck/Boost双向DC/DC变换器为例,在轻载时关断MOS管,利用MOS管的体二极管具有单向导电的特性,避免电感电流出现负值,从而降低变换器的能量损耗,提高变换器的效率。首先深入分析了运行在Buck状态下的双向DC/DC变换器的DCM模态的稳态性能。其次,分析了变换器的工作状况转换条件,求出各模态转换的临界负载电流。并通过引入的变比与其他参数之间的关系具体分析变换器在各种工作情况(CCM/DCM)下每相相电流的变化规律,同时找出变换器的总输出电流的变化规律。最后,通过仿真和实验的具体数据验证理论分析的可靠性。

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