移相+PWM控制双Boost半桥双向DC-DC变换器软开关过程的分析  

The Analysis of Soft-Switching of the Phase Shift + PWM Control Dual Boost Half-Bridge Bidirectional DC-DC Converter

作　　者：肖旭[1] 张方华[1] 郑愫 

机构地区：[1]南京航空航天大学江苏省新能源发电与电能变换重点实验室,南京210016

出　　处：《电工技术学报》2015年第16期17-25,55,共10页Transactions of China Electrotechnical Society

摘　　要：移相+PWM控制结合了移相控制和PWM控制的优点,可以减小变换器的电流应力和通态损耗,减小环流能量,提高变换器传输功率的能力,扩宽开关管零电压关断(ZVS)的范围。本文以移相+PWM控制双Boost半桥双向DC-DC变换器为研究对象,给出了变换器在各种工作模式下开关过程的等效电路模型,以及漏电感电流和结电容电压的表达式。分析了各开关管ZVS开通的条件,以及影响各开关管实现ZVS的非理想因素。最后给出了在特定功率软开关条件下的参数设计方法,通过仿真和实验证明了理论分析与参数设计方法的正确性。Phase shift ＋PWM control method has the advantages of phase shift and PWM control method. It can reduce the current stress, conduction loss and the circulation energy of the converter. It can also improve the ability of transmission power of the converter and broaden the range of zero voltage switch（ZVS） of the switches. In this paper, phase shift ＋PWM control dual Boost half-bridge bidirectional DC-DC converter is studied and the equivalent circuit models as well as the expressions of inductor current and capacitor voltage in dead time in a variety of work situations are given. The soft-switching conditions, as well as the non-ideal impact elements of the switches to achieve soft switching are analyzed. Finally, a method is given in the paper to design the parameters to get ZVS of all switches in the setting power condition. The correctness of the theoretical analysis and the method are verified by simulation and experiment.

关 键 词：相移+PWM 双向DC-DC 双Boost半桥 ZVS 

分 类 号：TM461[电气工程—电器]