双有源全桥DC/DC转换器的动态建模  

Dynamic Modeling of Dual Active Full Bridge DC/DC Converter

作　　者：宋建国[1] 谢敏波 张斌[1] SONG Jian-guo;XIE Min-bo;ZHANG Bin(Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学电子信息与控制工程学院,北京100124

出　　处：《电力电子技术》2020年第11期93-96,共4页Power Electronics

基　　金：北京市教育委员会(PXM2019_014204_500034)。

摘　　要：双有源全桥电路广泛应用于新能源电动汽车充电技术,将电动汽车的高压动力电池能量传递给低压蓄电池,确保低压配电器能够长时间稳定工作。双有源全桥DC/DC转换器采用了移相全桥控制技术,通过功率器件的结电容或并联谐振电容于变压器漏电感或是外加谐振电感,为功率器件创造零电压开关(ZVS)开断的条件,实现软开关控制。通过将电路进行模块化动态建模,对电路每个周期内自发的动态变化进行模型化验证。通过理论分析,利用Pspice搭建模型进行仿真验证,并通过实验台架验证了理论分析,为实际设计开发具有更宽动态性能的转换器提供理论依据。The dual active full bridge circuit is widely used in new energy electric vehicle charging technology,transferring the energy of the high-voltage power battery of the electric vehicle to the low-voltage battery to ensure that the low-voltage distributor can work stably for a long time.The dual active full bridge DC/DC converter uses phaseshifted full-bridge control technology.It creates the zero-voltage switching(ZVS)breaking conditions for the power device by using the junction capacitance of the power device or the parallel resonance capacitor to the leakage inductance of the transformer or the resonance inductance to achieve soft switching control.By modularizing the dynamic modeling of the circuit,the spontaneous dynamic changes within each cycle of the circuit are modeled and verified.Through theoretical analysis,Pspice is used to build a model for simulation verification,and the experimental analysis is used to verify the theoretical analysis,which provides a theoretical basis for the actual design and development of converters with wider dynamic performance.

关 键 词：转换器 移相全桥 软开关控制 双有源全桥 

分 类 号：TM46[电气工程—电器]