中国电机工程学报2023，Vol.43Issue(24)：9423-9434,中插4,13.DOI:10.13334/j.0258-8013.pcsee.223272
基于广义状态空间建模的串联谐振DC/DC变换器主动软开关控制策略
Control Strategy for Active Soft Switch of Generalized State Space Averaging Based Series Resonant DC/DC Converter
摘要
Abstract
Based on generalized state space averaging,this paper presents a control strategy which could realize the active soft switch of switching devices and regulate output voltage simultaneously by means of pulse frequency modulation-pulse width modulation(PFM+PWM)with two degrees of control freedom.The proposed strategy could"actively"change the soft switch mode according to the loss profiles of the devices,taking the overall improvement of efficiency and the realization of wide load range into account.Three operation modes of full bridge series resonant DC converter when switch frequency is above resonant frequency are analyzed,in which the abnormal discontinuous current mode could be escaped by designing resonant tank parameters.The generalized state space averaging is used to model the frequency response dynamics of the system including the modulation section whose numerical sweep results coincide with the physical model well.The sensitivity matrix reflecting the controllability of MIMO system is defined,by which the linear double-link control strategy to realize output voltage control and active soft switch control is designed.MATLAB/Simulink simulation and experiment prototype verify that the presented strategy could realize higher efficiency and wider load range of pulse frequency modulation.关键词
串联谐振变换器/脉冲频率调制-脉冲宽度调制/广义状态空间平均/主动软开关Key words
series resonant converter/pulse frequency modulation-pulse width modulation(PFM+PWM)/generalized state space averaging/active soft switch分类
信息技术与安全科学引用本文复制引用
张涛,王辉,王成,郭柏,王冠,王艺霏,房澳宇..基于广义状态空间建模的串联谐振DC/DC变换器主动软开关控制策略[J].中国电机工程学报,2023,43(24):9423-9434,中插4,13.基金项目
国家重点研发计划项目(2021YFB2601402).National Key R&D Program of China(2021YFB2601402). （2021YFB2601402）
