中国电机工程学报2025，Vol.45Issue(8)：3147-3159,中插24,14.DOI:10.13334/j.0258-8013.pcsee.240223
LLC谐振变换器简化时域算法及其频率前馈控制
Simplified Time-domain Algorithm and Frequency Feedforward Control of LLC Resonant Converter
李佳昊 1陈捷 1邵志冲 1蔡璟珂 1佘焱 1王勇1
作者信息
- 1. 上海交通大学电气工程系,上海市 闵行区 200240
- 折叠
摘要
Abstract
This paper proposes a frequency feedforward control method based on simplified time-domain analysis of LLC resonant converters to address the unsatisfactory dynamic response of traditional linear controllers.By simplifying the time-domain equations of LLC converters under three operating conditions-under resonance,over resonance near the resonance point,and over resonance far from the resonance point-we develop three simplified time-domain iterative algorithms that enable real-time calculation of the ideal switching frequency in digital controllers.These calculated frequencies are then fed forward to linear controllers,significantly improving the dynamic response of LLC converters.The proposed simplified time-domain algorithm can also compute working waveforms including voltage gain,resonant current,and resonant voltage in real time.Simulation results demonstrate that the algorithm's calculated working waveforms and voltage gain curves closely match those obtained from detailed time-domain analysis,confirming the algorithm's accuracy.An experimental prototype validates the dynamic response improvement achieved by the proposed feedforward control.Experimental results indicate that this feedforward control effectively optimizes performance across various LLC converter dynamic processes while imposing a relatively low computational burden on digital controllers.关键词
LLC 谐振变换器/简化时域方程/泰勒展开/前馈控制/动态响应Key words
LLC resonant converter/simplified time-domain equation/Taylor expansion/feedforward control/dynamic response分类
信息技术与安全科学引用本文复制引用
李佳昊,陈捷,邵志冲,蔡璟珂,佘焱,王勇..LLC谐振变换器简化时域算法及其频率前馈控制[J].中国电机工程学报,2025,45(8):3147-3159,中插24,14.
