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一种适用于宽输入电压范围的三端口变换器

, PP. 119-125

Keywords: 三端口变换器,直流变换器,新能源供电系统,升降压变换器,拓扑

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Abstract:

提出一种适用于宽电压范围的H桥三端口变换器。在H桥升降压变换器的基础上引入变压器副边整流滤波电路,形成变换器的第3个输出端口,从而构造出H桥三端口变换器;变换器包括两个双向输入/输出端和一个隔离输出端,分别与输入源、蓄电池和负载相连,同时实现三者的功率控制;变换器的原边电路等效为H桥升降压变换器,可以适应输入源电压宽范围变化的应用需求。详细分析变换器的工作状态及开关模态,分析开关时序对变压器直流偏置电流的影响,提出优化的开关时序控制方式,最后通过实验验证理论分析的正确性。

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