现代电子技术2025，Vol.48Issue(24)：41-46,6.DOI:10.16652/j.issn.1004-373x.2025.24.007
基于优化轨迹控制的DNPC LLC谐振变换器软启动研究
Research on DNPC LLC resonant converter soft start based on optimal trajectory control
摘要
Abstract
In allusion to the problems such as increased switching device losses,significant parasitic parameters,and electromagnetic interference caused by the high startup frequency when traditional LLC resonant converters adopt frequency-reduction for start-up,the establishment process of the state trajectory control of the DNPC(diode-clamped type)LLC resonant converter is analyzed.Phase shift control is added on the basis of the existing frequency-modulation control,and a method of phase shift and frequency-modulation trajectory control soft-start is proposed.The trajectory waveform of the phase shift and frequency-modulation soft-start is analyzed,and the frequency solution methods for each stage in the phase shift and frequency-modulation control are presented.A model of the DNPC LLC resonant converter is constructed in Matlab/Simulink,and the variation processes of frequency,resonant voltage and current during startup are analyzed by means of the simulation.The effectiveness of the proposed method of phase shift and frequency-modulation trajectory control soft-start is verified based on the DNPC LLC resonant converter hardware platform.The results show that the resonant inductance current of the proposed method is stable near the maximum current limit band at the beginning of startup.In comparison with the traditional trajectory control,the proposed method has a higher resonant capacitor voltage at the beginning of startup and a faster startup process.关键词
DNPC LLC谐振变换器/状态轨迹控制/软启动/移相变频控制/启动频率/谐振电流Key words
DNPC LLC resonant converter/state trajectory control/soft start/phase shift frequency conversion control/startup frequency/resonant current分类
信息技术与安全科学引用本文复制引用
黄珺,沈飞,毛世威..基于优化轨迹控制的DNPC LLC谐振变换器软启动研究[J].现代电子技术,2025,48(24):41-46,6.基金项目
国家自然科学基金项目(52130710) （52130710）
