同步整流式三端口半桥变换器

Three-port Half-bridge Converter With Synchronous Rectification

提出一种适用于独立新能源供电系统的同步整流式三端口变换器拓扑。该拓扑形式与同步整流半桥变换器相同,蓄电池并联于分压电容,变压器同时用作储能电感,同步整流支路为此电感-变压器的电流提供续流回路;原边两开关管相互独立控制,实现三个端口之间的功率控制,并且任意两端口之间均为单级功率变换;详细分析变换器的工作状态、原理和电路模态,实验验证了拓扑及理论分析的正确性。将拓扑构成和控制思想推广,进一步提出其它形式的三端口和多端口半桥变换器。

A three-port half-bridge converter for stand-alone renewable power system was proposed. The topology of proposed converter was the same as half-bridge converter with synchronous rectifier and the battery was in parallel with one of the voltage dividing capacitors. The magnetizing inductor of the transformer was used as an inductor. The synchronous rectification circuit provided a free-wheeling path for the current of inductor-transformer and power control of the three ports was implemented by independent control of the two switches in primary side. Single stage power conversion between any two of the three ports was achieved. The operational states and principles of the proposed converter were analyzed and verified with experimental results. Furthermore, the topology generation and control method of the proposed three-port half- bridge converter was extended to some other novel three-port and multi-port half-bridge converter topologies was proposed.