Review of Analysis Methods and Control Technologies for CLLC Resonant Converters

Q1 Engineering

Chinese Journal of Electrical Engineering Pub Date : 2025-06-01 DOI:10.23919/CJEE.2025.000131

Kai Sun;Kai Zhang;Huan Chen;Leheng Wang;Zengyang Liu

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Abstract

A CLLC converter is a high-frequency, high-efficiency, isolated bidirectional DC/DC converter that is widely used in DC microgrid applications. The typical topology and basic working principle of CLLC converters are introduced herein. Subsequently, both analysis methods and control technologies are reviewed. On the one hand, several steady-state analysis models are listed, consisting of a harmonic approximation-based model in the frequency domain and a state equation-based model in the time domain, and some initial dynamic models are also included. On the other hand, numerous new control technologies are presented for different targets, such as soft startup control methods from a safety perspective, synchronous rectification (SR) control methods for efficiency optimization, highly dynamic control methods for better performance, bidirectional switching control methods, and wide voltage gain control methods aimed at popular vehicle-to-grid (V2G) and electric vehicle (EV) charging application scenarios. Finally, the future evolution of CLLC resonant converters is discussed.

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CLLC谐振变换器分析方法与控制技术综述

CLLC变换器是一种高频、高效、隔离的双向DC/DC变换器，广泛应用于直流微电网中。介绍了CLLC变换器的典型拓扑结构和基本工作原理。随后，对分析方法和控制技术进行了综述。一方面，列出了几种稳态分析模型，包括频域的谐波近似模型和时域的状态方程模型，以及一些初始动态模型。另一方面，针对不同的目标，提出了许多新的控制技术，例如从安全角度出发的软启动控制方法、优化效率的同步整流（SR）控制方法、提高性能的高动态控制方法、双向开关控制方法以及针对汽车到电网（V2G）和电动汽车（EV）充电应用场景的宽电压增益控制方法。最后，对CLLC谐振变换器的未来发展进行了展望。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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