A Passive Current Sharing Method With Common Inductor Multiphase LLC Resonant Converter

Autor: Yan-Fei Liu, Yang Chen, Jahangir Afsharian, Zhihua Yang, Hongliang Wang
Rok vydání: 2017
Předmět:
Zdroj: IEEE Transactions on Power Electronics. 32:6994-7010
ISSN: 1941-0107
0885-8993
DOI: 10.1109/tpel.2016.2626312
Popis: In this paper, a new common inductor current sharing method is proposed for a multiphase LLC resonant converter for high-power applications. Automatic current sharing is achieved by using a common resonant inductor connecting the resonant inductors in each LLC phase in parallel. The current sharing performance of the proposed method is evaluated under first harmonic approximation (FHA) assumption. The proposed method can automatically share the primary resonant current and the load current for all phases without any additional circuit and control strategy. A 600-W two-phase LLC converter prototype based on the proposed method is built to verify the feasibility. Excellent current sharing performance (less than 0.5% current sharing error at full load) has been achieved.
Databáze: OpenAIRE