PWM-PFM定变频混合控制下的三端口隔离型谐振变换器研究

打开文本图片集

中图分类号：TM46 文献标志码：A 文章编号：1003-5168（2025）22-0010-06

DOI：10.19968/j.cnki.hnkj.1003-5168.2025.22.002

Research on Three-Port Isolated Resonant Converter under PWMPFMFixed-Frequency Hybrid Control

LIU Zixuan CUIChongyu JING Liupan BAI Jing CHENG Xin （Xizang Agricultural and Animal Husbandry University College，Linzhi 86oooo， China）

Abstract： [Purposes] To address the issue of poor adaptability of resonant converters in applications requiring a wide range of output voltages，a PWM-PFM fixed-frequency hybrid control scheme applied to a three-port isolated CLLC DC converter is proposed.[Methods] Leveraging the advantage of PWM control in easily achieving wide-range output and based on previous research findings，the PWM-PFM fixed-frequency hybrid control scheme for the three-port isolated CLLC DC converter is proposed. Subsequently，steady-state and transient scenarios are simulated and analyzed using Matlab/Simulink simulation software.[Findings] Simulation results show that the voltages at each port on the secondary side of the resonant converter can maintain stable output，and the currents can respond rapidly to reach steady state.[Conclusions] This successfully demonstrates that the three-port resonant converter employing the PWM-PFM fixed-frequency hybrid control scheme can achieve wide-range output while ensuring stable and anti-interference operation.

Keywords： three-port isolated DC converter; CLLC resonant structure; PWM-PFM fixed-frequency hybrid control; stability analysis;Matlab/Simulink simulation

0 引言

直流功率转换装置凭借其高效、低噪声及稳定工作的特点，已成为现代电子设备实现高性能的关键组件。（剩余6994字）