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单电感电流连续型推挽类拓扑的推衍和特性研究

, PP. 85-92

Keywords: 电源控制器,推挽单元,电流连续,低纹波,电流凹陷,电流尖峰,拓扑

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Abstract:

鉴于电流连续型拓扑的优越性,结合推挽类拓扑在卫星电源系统中应用广泛的现状,提出单电感电流连续型推挽类拓扑的概念。通过对传统推挽单元进行推导得到4种新的非隔离型推挽单元。以此为基础,分别推衍得到4类推挽单元的单电感电流连续型拓扑族,其中有3种拓扑为首次提出的新型拓扑。根据拓扑结构以及控制方式的不同,可将这些拓扑分成Smart和Weinberg两类,其中Smart类拓扑低纹波侧电流存在凹陷,已提出的Weinberg类拓扑低纹波侧电流存在尖峰,而该文提出的3种新型拓扑不存在此问题。由母线侧电流低纹波的条件,还可将所有拓扑分成适用作蓄电池放电调节器和适用作蓄电池充电调节器两类,通过列表对拓扑的各项特性进行比较,从而得到各种拓扑的优缺点及其适用场合,为电源控制器系统中DC-DC变换器的选择提供理论支持。最后选择一种新型拓扑,搭建实验平台验证理论分析结果。

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