Parameter optimization design of bidirectional CLLC resonant converter under variable frequency control

IF 4.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Electric Power Systems Research Pub Date : 2026-06-01 Epub Date: 2026-02-10 DOI:10.1016/j.epsr.2026.112834

Dangshu Wang , Zelong Hou , Licong Zhao , Guangzhen Wu , Nongke Li , Pengpeng Xie , Xinxia Wang

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Abstract

The bidirectional CLLC resonant converter exhibits the capability for bidirectional energy flow, along with significant advantages of high efficiency and high power density. However, traditional parameter design methods suffer from complex procedures and high computational difficulty. To address this issue, this paper employs the Fundamental Harmonic Analysis (FHA) method to model the CLLC resonant converter, deriving its voltage gain characteristics and the conditions required for achieving soft-switching. Based on the gain characteristics and soft-switching constraints, a simplified resonant network parameter design methodology integrating mathematical analytical expressions and graphical analysis is proposed. This method optimizes the design process and significantly reduces the complexity of parameter design. A 500 W laboratory prototype was built using the optimized parameters. Experimental results demonstrate that the prototype meets the voltage gain requirements while achieving soft-switching operation, with a forward power transmission efficiency of up to 97.6%, thereby validating the correctness of the theoretical analysis and the practical feasibility of the parameter optimization design.

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变频控制下双向CLLC谐振变换器参数优化设计

双向CLLC谐振变换器具有双向能量流动的能力，具有显著的高效率和高功率密度的优点。但传统的参数设计方法程序复杂，计算难度大。为了解决这一问题，本文采用基谐波分析（FHA）方法对CLLC谐振变换器进行建模，推导出其电压增益特性和实现软开关所需的条件。基于增益特性和软开关约束，提出了一种结合数学解析表达式和图形分析的简化谐振网络参数设计方法。该方法优化了设计过程，显著降低了参数设计的复杂度。利用优化后的参数建立了500w的实验室样机。实验结果表明，样机在实现软开关工作的同时满足了电压增益要求，前向功率传输效率高达97.6%，从而验证了理论分析的正确性和参数优化设计的实际可行性。

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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来源期刊

Electric Power Systems Research 工程技术-工程：电子与电气

CiteScore

7.50

自引率

17.90%

发文量

963

审稿时长

3.8 months

期刊介绍： Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview. • Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation. • Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design. • Substation work: equipment design, protection and control systems. • Distribution techniques, equipment development, and smart grids. • The utilization area from energy efficiency to distributed load levelling techniques. • Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.