基于ZVS负载范围的移相全桥变换器参数优化设计  

Optimization Parameter Design of Phase⁃shifted Full⁃bridge Converter Based on ZVS Load Range

作　　者：何俊鹏 张润泽 白旭峰 郝帅 曹虎 HE Junpeng;ZHANG Runze;BAI Xufeng;HAO Shuai;CAO Hu(Technology Center,CRRC Qingdao Sifang Rolling Stock Research Institute Co.,Ltd.,Qingdao 266000,Shandong,China)

机构地区：[1]中车青岛四方车辆研究所有限公司技术中心,山东青岛266000

出　　处：《电气传动》2021年第21期14-21,共8页Electric Drive

摘　　要：移相全桥(PSFB)变换器以其零电压开通(ZVS)的软开关特性而得到广泛的应用。但在实际的工程应用中,移相全桥变换器电路参数的设计仍然存在较大的困难。通过深入分析移相全桥变换器的工作原理,推导出系统占空比丢失以及ZVS负载范围的数学表达式,提出了一种基于ZVS负载范围的移相全桥变换器参数优化设计方法,详细地介绍了隔直电容、输出滤波电感、谐振电感以及IGBT死区时间的设计方法。最后,通过搭建45 kW的实验样机验证了理论分析的正确性。The phase-shifted full-bridge(PSFB)converter is widely used because of its soft-switching characteristics of zero-voltage-switching(ZVS).However,in actual engineering applications,the design of the circuit parameters for PSFB converter still has great difficulties.The mathematical expressions of system duty cycle loss and ZVS load range were derived,and an optimization parameter design method of PSFB converter based on ZVS load range was proposed through analysing the working principle of PSFB converter in deeply.Design methods of DC blocking capacitor,output filter inductor,resonant inductor and IGBT dead time were introduced in detail.Finally,the correctness of the theoretical analysis was verified by building a 45 kWexperimental prototype.

关 键 词：移相全桥 参数设计 占空比丢失 ZVS负载范围 

分 类 号：TM46[电气工程—电器]