| 引用本文: | 吴维鑫,张钟艺,肖晓森,等.基于时域分析的CLLC谐振变换器参数优化设计[J].电力系统保护与控制,2023,51(14):139-151.[点击复制] |
| WU Weixin,ZHANG Zhongyi,XIAO Xiaosen,et al.Parameter optimization design of a CLLC resonant converter based on time domain analysis[J].Power System Protection and Control,2023,51(14):139-151[点击复制] |
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| 基于时域分析的CLLC谐振变换器参数优化设计 |
| 吴维鑫1,2,张钟艺1,2,肖晓森1,2,游玮1,2,金涛1,2 |
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| (1.福州大学电气工程与自动化学院，福建 福州 350108;2.福建省新能源发电与
电能变换重点实验室，福建 福州 350108) |
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| 摘要: |
| 基波分析法在偏离谐振频率点时难以给出准确的增益结果，不适用于宽增益范围的应用场合。基于此问题，提出一种新的时域分析法来推导更加精确的CLLC谐振变换器增益表达式，从而指导参数优化设计。首先，分析了基波分析法存在的不足。然后，通过时域分析对不同运行模态下的CLLC变换器进行建模，推导得出更加精确的增益表达式。在满足软开关的前提下，利用推导得出的精确增益公式对电感比k及品质因数Q的取值进行了优化。该方法得到的增益公式精度高且参数设计流程简洁。最后，基于优化设计的参数，搭建了一台1 kW且满足宽增益范围输出的实验样机。仿真与实验结果均验证了时域分析的准确性与参数设计方法的可行性。 |
| 关键词: 宽增益范围 时域分析法 CLLC谐振变换器 参数优化设计 软开关 |
| DOI：10.19783/j.cnki.pspc.221531 |
| 投稿时间：2022-09-25修订日期：2022-11-30 |
| 基金项目:国家自然科学基金项目资助(51977039)；中央引导地方科技发展专项资助(2021L3005) |
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| Parameter optimization design of a CLLC resonant converter based on time domain analysis |
| WU Weixin1,2,ZHANG Zhongyi1,2,XIAO Xiaosen1,2,YOU Wei1,2,JIN Tao1,2 |
| ((1.College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China;
2. Fujian Key Laboratory of New Energy Generation and Power Conversion, Fuzhou 350108, China) |
| Abstract: |
| For the first harmonic approximation (FHA), it is difficult to obtain accurate gain results when it deviates from the resonant frequency point, and it is not suitable for the application of wide gain range. Based on this issue, a new time domain analysis (TDA) method is proposed to derive more accurate gain expressions of CLLC resonant converters, so as to guide parameter optimization design. First, the deficiency of the FHA is analyzed. Then, the CLLC converters in different operating modes are modeled by TDA, and a more accurate gain expression is derived. Under the premise of satisfying soft switching, the inductance ratio k and the quality factor Q are optimized by the derived precise gain formula. The gain formula obtained by this method has high precision and a simple parameter design process. Finally, based on the parameters of the optimized design, a 1 kW experimental prototype is built that satisfies the wide gain range output. The simulation and experimental results both verify the accuracy of TDA and the feasibility of the parameter design method. |
| Key words: wide gain range TDA CLLC resonant converter parameter optimization design soft switching |
