基于改进自抗扰的全桥LLC谐振变换器混合控制

项光阳; 张春; 张勇成

文章摘要

基于改进自抗扰的全桥LLC谐振变换器混合控制

Hybrid Control of Full-Bridge LLC Resonant Converter Based on Improved Active Disturbance Rejection

投稿时间：2026-01-14 修订日期：2026-02-07

DOI：

英文关键词: Full-Bridge LLC Resonant Converter Improved Super-Twisting Sliding Mode Active Disturbance Rejection Control Frequency Conversion - Phase Shift Control

基金项目:国家自然科学(U21A20146)；安徽高校协同创新项目(GXXT-2020-070)

作者	单位	邮编
项光阳	安徽工程大学	241000
张春^*	安徽工程大学	241000
张勇成	安徽工程大学	241000

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中文摘要:

为进一步优化全桥LLC(Inductor-Inductor-Capacitor)谐振变换器变频-移相控制扰动估计的实时性和准确性,并提升系统的动态响应能力和鲁棒性,提出一种基于改进超螺旋滑模自抗扰的变频-移相控制策略。首先,对全桥LLC谐振变换器变频和移相两种模式进行研究。其次,针对传统线性扩张状态观测器的扰动估计环节存在相位滞后的问题,在扰动补偿环节增加一个基于误差的比例微分(Proportional Derivative ,PD)环节,使其能更快地跟踪真实扰动,让补偿更为及时。最后,引入超螺旋滑模(Super-Twisting Sliding Mode,STSM)控制器对传统线性状态误差反馈环节中的控制器进行改进,以提高系统动态性能和快速性。通过MATLAB/Simulink构建仿真模型进行仿真研究,对比传统线性自抗扰控制,所提策略在切换过程中超调量降低约50%,恢复时间缩短至1ms,表现出更优的动态性能。

英文摘要:

To further optimize the real-time performance and accuracy of disturbance estimation in the variable frequency-phase shift control of a full-bridge LLC (inductor-inductor-capacitor) resonant converter, and to enhance the system"s dynamic response and robustness, an improved super-twisting sliding mode active disturbance rejection control strategy for variable frequency-phase shift control is proposed. First, the variable frequency and phase shift modes of the full-bridge LLC resonant converter are investigated. Second, to address the phase lag issue in the disturbance estimation of the traditional linear extended state observer, a proportional-derivative link based on error is added to the disturbance compensation loop, enabling faster tracking of actual disturbances and more timely compensation. Finally, a super-twisting sliding mode controller is introduced to replace the controller in the traditional linear state error feedback loop, thereby enhancing the dynamic performance and response speed of the system. A simulation model is constructed using MATLAB/Simulink for validation. Compared with the traditional linear active disturbance rejection control, the proposed strategy reduces overshoot by approximately 50% during the switching process and shortens the recovery time to 1ms, demonstrating superior dynamic performance.

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