单原边绕组电压源型双输入推挽变换器

Single-Primary-Winding Voltage-Fed Double-Input Push-Pull Converter

多原边绕组多输入推挽变换器适用于中小功率场合,但随着输入源数量的增加,原边绕组和开关管的数量均增多。论文根据脉冲电压源组合原则,将非隔离型脉冲电压源串联或并联的组合直接替代单输入推挽变换器的输入源,从而获得一族单原边绕组电压源型多输入推挽变换器。相对于传统的多原边绕组多输入推挽变换器,它具有单个原边绕组,因此体积和成本将大为减小。文中以Buck型脉冲电压源串联组合构成的单元边绕组双输入推挽变换器为例,详细分析其工作原理、模态和性能,并阐述控制原则,最后给出仿真及实验结果以验证理论分析的正确性。

Multi-input push-pull converter with multiple-primary-winding is suitable in small and medium-power applications. However, with the increase of the input sources, the number of the primary windings and switches increases as well. Based on Pulsating Voltage Source Cells （PVSCs） combination principle, the input voltage source of the single-input push-pull converter is replaced with the series or parallel-cormected non-isolated pulsating voltage source cells （PVSCs）. So a family of single- primary-winding （SPW） voltage-fed multi-input push-pull converters can be proposed. Compared to traditional multi-input converters, they have a form of single-Primary-Winding, and therefore the size and cost is greatly reduced. Since the configuration of a double-input Buck DC/DC converter is very simple, it is chosen as an example to analysis the MIC. The operation principle, modes and control strategy are illustrated. Finally, simulation and experimental results are presented to verify the theoretical analysis.