中国电机工程学报2026，Vol.46Issue(5)：2022-2032,中插23,12.DOI:10.13334/j.0258-8013.pcsee.250867
一种双半桥三通道超宽增益LLC谐振变换器及其控制策略
A Dual Half-bridge Three-channel Ultra-wide Gain LLC Resonant Converter and Its Control Strategy
摘要
Abstract
To address the contradiction in traditional LLC resonant converters where a wide switching frequency range in wide voltage applications increases circulating current losses and leads to a decline in overall efficiency,an LLC resonant converter with a dual half-bridge three-channel topology is proposed.This converter employs a hybrid pulse width modulation-pulse frequency modulation(PWM-PFM)control strategy to establish three operating sub-modes:the synchronous dual-channel mode,the asynchronous three-channel bridge rectification mode,and the asynchronous three-channel voltage-doubler rectification mode.These sub-modes cover different gain ranges,enabling an ultra-wide output voltage range.The working principles under each mode and the derivation of gain formulas are analyzed in detail.Finally,an experimental prototype with an output voltage range of 15～150 V and a constant output current of 2 A is designed and built.Experimental results verify the feasibility and effec-tiveness of the proposed converter.关键词
多模态切换/超宽电压增益/LLC谐振变换器/三通道/混合控制策略Key words
multimode switching/ultra-wide voltage gain/LLC resonant converter/three-channel/hybrid control strategy分类
信息技术与安全科学引用本文复制引用
林昊,林国庆,林羽静..一种双半桥三通道超宽增益LLC谐振变换器及其控制策略[J].中国电机工程学报,2026,46(5):2022-2032,中插23,12.基金项目
福建省发改委科技项目(00389102) （00389102）
晋江市福大科教园区发展中心科研项目(2019-JJFDKY-37).Science and Technology Project of Fujian Provincial Development and Reform Commission(00389102) （2019-JJFDKY-37）
Jinjiang Science and Education Park Development Center Research Project(2019-JJFDKY-37). （2019-JJFDKY-37）
