一种适用于宽输入电压范围的三端口变换器

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。

A Novel Three-Port Converter for Wide-input-voltage-range Application

An H-bridge three-port converter(HB-TPC) for wide-voltage range application was proposed.The HB-TPC is generated based on the H-bridge Buck/Boost converter by introducing a transformer and a secondary rectifier and filter circuit to build the third output port.The converter is composed of two bidirectional ports and an isolated output port.The three ports are connected to input source,battery and load respectively.Power management among the three ports is achieved with the proposed HB-TPC.The equivalent circuit of primary side is H-bridge Buck/Boost converter,which can meet the demand of wide-input-range-voltage application.The work states and operational modes of the proposed converter were analyzed in detail.Furthermore,the relationship between the switching sequences of the power switches and the DC-bias value of the transformer was analyzed and an optimized switching scheme was designed.Finally,the topology and analysis were verified by experimental results.