Due to its frequent occurrence in the electric vehicle (EV) and hybrid electric vehicle (HEV) applications, light-load efficiency of the dc–dc converter is critical. Different from the conventional boost converter, in this work, a novel composite converter is proposed and investigated to achieve significantly improved light-load efficiency. The proposed converter consists of a current-fed dual-half-bridge (CF-DHB) converter module and a boost converter module, which can be controlled and optimized independently. The interconnection of the two modules leads to advantages, such as lower voltage stress across the power device and a wide conversion ratio. In this article, a multi-variable efficiency optimization method is proposed utilizing the topology advantages of the proposed converter to address the light-load efficiency issue. Based on the loss model, the power sharing between the two converter modules and the switching frequency of the boost converter module are optimized at light load. A 30-kW silicon carbide (SiC)-based composite dc–dc converter prototype is built to validate the proposed multi-variable efficiency optimization method in the light-load operating conditions. Extensive experimental results are presented to demonstrate the noticeable efficiency improvement brought by the proposed method.


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    Title :

    A Current-Fed Dual-Half-Bridge-Based Composite Converter With Improved Light-Load Efficiency Through a Multi-Variable Optimization


    Contributors:
    Lin, Nan (author) / Zhao, Zhe (author) / Diao, Fei (author) / Zhao, Yue (author) / Balda, Juan Carlos (author)


    Publication date :

    2022-06-01


    Size :

    9020460 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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