Research of LC Series Resonant Bidrectional DC/DC Converter

doi:10.16628/j.cnki.2095-8188.2020.02.006

Abstract

Abstract: The traditional bidirectional DC/DC converter has large backflow power,limited soft switch range and switch off at peak current.On the basis of the original circuit,a resonance network was introduced to study LC series resonant DC/DC converter.The approximate equivalent circuit model of LC series resonant DAB converter was established by fundamental wave analysis,and the expressions of power transmission and output current of the converter were derived.The working principle,power transmission characteristics,soft switching conditions and three kinds of soft switching modes were described.Compared with the non resonant DAB converter,the LC series resonant DAB converter is more close to the sinusoidal,the switch off current is smaller,the switching loss is reduced,and the system EMC characteristics can be improved.Through MATLAB/Simulink simulation software,it validated the principle and control method of the system.The utilization and efficiency of the system performance were validated by the experimental results.

Key words: bidirectional DC-DC converter, series resonant, phase-shifting control, funda mental wave analysis

CLC Number:

TM464

LUO Min, LIANG Hui. Research of LC Series Resonant Bidrectional DC/DC Converter[J]. DIANQI YU NENGXIAO GUANLI JISHU, 2020, 587(2): 30-40.

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