A Universal Automatic Optimal Design Method for CLLLC Class Resonant Converters and Comprehensive Comparison Among Different Resonant Tanks
发布时间：2026-07-07
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- 发布时间：
- 2026-07-07
- 论文名称：
- A Universal Automatic Optimal Design Method for CLLLC Class Resonant Converters and Comprehensive Comparison Among Different Resonant Tanks
- 发表刊物：
- IEEE Transactions on Power Electronics
- 摘要：
- CLLLC class resonant converters are widely applied in bidirectional power flow scenarios. However, the design of CLLLC is a complex process including the selection of resonant tanks, parameters, and magnetic cores together with various engineering restrictions. During the design process, time domain model (TDM) is widely used to improve the model accuracy, which contains multiple complex procedures and is hard to be applied. To further improve the universality and practicality of the existing design methods, an optimal design method for CLLLC is proposed in this article. Compared with the existing literatures, the following improvements are included in the proposed method: by developing the universal non-linear equations based on the symmetric condition, the operation mode judgement process of the TDM is eliminated, which significantly reduces the modeling complexity; the database-based magnetic core design process is included to conduct a multiobjective design including efficiency and power density, the engineering restrictions are also included in the process; and a hierarchical design flowchart of resonant tank parameters and magnetic related parameters is proposed to largely reduce the computational burden. Furthermore, by conducting the proposed design process for multiple typical applications, the pareto front of efficiency and power density are compared for different types of resonant tanks including asymmetrical CLLLC (ACLLLC) and CLLC. From the comparison results, ACLLLC and CLLC has identical electricity characteristic by using the parameter equivalence process, and CLLC has better efficiency and power density performance. The design process and comparison results are verified by a 1 kW prototype with three types of resonant tanks, which shows that CLLC has higher efficiency compared with ACLLLC, while the total volume of magnetic cores can be reduced from 32.42 cm3 to 26.98 cm3.
- 第一作者：
- 李子昂
- 是否译文：
- 否