The interleaved boost-integrated bidirectional CLLC (IBIB-CLLC) resonant converter is derived by integrating a two-phase interlaced boost circuit and a full-bridge CLLC circuit. The structure can effectively broaden the gain range of the converter. However, the added magnetic components increase the size and cost of the converter. In this article, coupling inductors are used to reduce the number of cores and the size of inductors in order to reduce the cost and improve the converter efficiency. Using magnetic integration technology will affect the zero voltage switch (ZVS) performance of the converter. The effect of coupling inductance on the characteristics of the converter is analyzed by establishing the equivalent circuit model of the coupling inductance converter, and the current ripple property of the coupling inductance converter and the conditions of realizing zero voltage conversion are given. In addition, a specific guide design method for the coupled inductors is also provided. Finally, a 1.6-kW rated prototype was built based on GaN-HEMT prototype, which verified the validity of the design method and the correctness of the theoretical analysis. The peak efficiency of the converter is 97.2% at an output power of 1.3 kW. Compared with the discrete magnet design method, the method proposed in this article can improve the design efficiency by about 0.6% and reduce the volume by about 35%.
Analysis and Design of Interleaved Boost-Integrated Bidirectional CLLC Resonant Converter With Coupled Inductor and Wide ZVS Range
IEEE Transactions on Transportation Electrification ; 11 , 4 ; 8959-8973
2025-08-01
3909260 byte
Article (Journal)
Electronic Resource
English
Parameter design method for bidirectional CLLC resonant converter
European Patent Office | 2021
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