To support higher voltage onboard power supply system and electric vehicle (EV) endurance scheme, reconfiguration on novel unbalance levels strategy is developed and adopted in a three-level bidirectional inductor-inductor–capacitor (LLC) resonant converter for wider voltage charging between supercapacitor energy storage (SCES) and battery energy storage (BES) in hybrid energy storage system (HESS), which the proposed converter is composed of an LLC resonant tank module (RTM) and two three-level coupling cascaded neutral point clamping active bridge (3L-CCNPC). Also, the definition of each voltage gain mode in forward and backward workings is established by hybrid modulation strategy with flexible multilevel output ability of novel active bridge. Besides, a wider range of the unified bidirectional voltage gain is achieved by switching among multiple voltage gain modes, which can be implemented by moving among unified bidirectional voltage gain points. Based on the optimization objectives, such as narrowing the pulse frequency modulation (PFM) variation range, the parameters of LLC RTM are designed. Finally, the results from built experimental prototype can verify that the obtained voltage gains are all close to the theoretical design values, and the key waveforms visually reflect the characteristics of novel unbalance levels strategy adopted in bidirectional voltage gain modes of each gain point.


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    Titel :

    Reconfiguration on Novel Unbalance Levels Strategy Adopted in a Three-Level Bidirectional LLC Resonant Converter in HESS to EV Endurance Scheme


    Beteiligte:
    Zhang, Zhongyi (Autor:in) / Xu, Yi (Autor:in) / Yuan, Yisheng (Autor:in) / Cao, Hui (Autor:in) / Liu, Peng (Autor:in) / Jin, Tao (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    01.02.2025


    Format / Umfang :

    8804728 byte




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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