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拓扑与电路 LLC谐振 DC-DC变换器 PWM控制 ★ 5.0

基于扩展描述函数法的LLC谐振DC/DC变换器观测器控制

Observer-Based Control of LLC DC/DC Resonant Converter Using Extended Describing Functions

语言:

中文摘要

本文研究了LLC谐振变换器在宽输入电压和负载变化下的动态特性、频率响应及控制策略。通过扩展描述函数法建立了LLC变换器的非线性模型,并据此设计了一种基于非线性观测器的控制器,有效提升了系统的动态性能与稳定性。

English Abstract

This paper presents theoretical and practical results about dynamic analysis, frequency response, and control of a LLC resonant dc/dc converter operating under wide input voltage and load variations. A nonlinear model for the LLC resonant converter was developed using the extended describing function method; then, based on the derived model, a nonlinear observer-based controller was designed and i...
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SunView 深度解读

LLC谐振变换器是阳光电源户用光伏逆变器及储能系统(如PowerStack、PowerTitan系列中的DC/DC环节)的核心拓扑。该文提出的基于扩展描述函数法的非线性观测器控制,能够显著改善变换器在宽电压范围和剧烈负载波动下的瞬态响应速度,这对提升户用储能系统在离网切换、负载突变场景下的输出电压质量至关重要。建议研发团队将其引入iSolarCloud智能运维平台的仿真模型中,并优化现有逆变器控制算法,以提升产品在复杂工况下的鲁棒性。