数字化移相控制隔离型双向软开关变换器

An Insulated Bi-directional Digital Phase Shift Control Soft Switching DC/DC Converter

隔离型双向直流变换器作为电力电子变换器的一个新分支,在分布式发电、光伏发电、电动汽车等系统中起着控制能量流动方向和调节能量大小的双重作用,是系统中的核心部分,故有必要对其进行深入的研究。介绍了一种隔离型双向软开关变换器的拓扑结构和工作原理,并推导出了该变换器的数学模型。设计了以TMS320F2812为处理器的控制系统,并阐述了一种简单可靠的基于DSP的数字化移相脉冲生成方法。研制了实验样机,并进行了实验研究。实验结果证实了理论分析的正确性,同时证明所有开关管均可实现软开关。

Isolated bi-directional DC/DC converter is a new branch of power electronic convertersi,t plays the dual role of controlling the direction of energy flow and regulating energy in the system of distributed generation,photovoltaic power generation,wind powerf,uel cells,electric vehicles and othersi,ts’ a core part in the systems,o it is necessary to have an indepth study.A topology and operation theory of insulated bi-directional soft switching converter are introducedt,he state space average mathematics model is gotten according to modern control theory.The control system based on TMS320F2812 is designed and a simple and reliable method which produce digital phase shift pulse based on DSP is explicated.A proto-type is established and some experiments have been done.The experimental results verify the validity of the theoretical analysis and all switches can realize soft switching.