摘要
针对移相全桥变换器因谐振电感体积和占空比损失的限制,传统控制方法难以在宽负载范围内实现软开关的问题,采用1种基于峰值电流与突发模式的混合控制方法。通过调整突发占空比稳定输出电压到参考值,改变移相角保证原边有足够大的电流实现滞后桥臂开关管的零电压开通。对所采用的控制方式搭建仿真平台,并研制1台240 W样机,通过数字信号处理器实现移相全桥变换器混合控制,通过仿真和实验验证控制方法的可行性。
Aimed at the problem that the traditional control methods are difficult to achieve soft-switching in a wide load range due to the limitation of resonant inductor volume and duty cycle loss in phase-shifted full-bridge converters,a hybrid control method based on peak current and Burst mode is proposed.The output voltage is stabilized to a reference value by adjusting the Burst duty cycle,and the phase shift angle is changed to maintain the minimum primary current so as to realize the lagging bridge arm zero voltage switching.A simulation platform was built for the proposed control method,and a 250 W prototype was developed.The hybrid control of a phase-shifted full-bridge converter was realized through a digital signal processor,and the feasibility of the control method was verified by simulation and experimental results.
作者
吴斌
何圣仲
代东雷
陈宇航
徐英雷
WU Bin;HE Shengzhong;DAI Donglei;CHEN Yuhang;XU Yinglei(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611730,China)
出处
《电源学报》
北大核心
2025年第2期40-47,共8页
Journal of Power Supply
关键词
移相全桥变换器
轻载软开关
混合控制
突发模式
峰值电流控制
Phase-shifted full-bridge converter
light-load soft-switching
hybrid control
Burst mode
peak current control
