A Bridgeless Buck-flyback PFC Converter with High PF and Dead Angles Eliminated

Zhengge Chen, Pooya Davari, Huai Wang

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    6 Scopus citations

    Abstract

    The inherent dead angles of the input line current in buck power factor correction (PFC) converter deteriorate the power factor (PF) and commonly extra switches with high control complexity are required to eliminate these dead angles. Alternatively, this paper proposed a topological solution using a simple single voltage loop control. The proposed switch integrated bridgeless buck-flyback PFC converter operates in buck-flyback mode and can automatically change to flyback mode when the dead angles occur. Bridgeless operation modes of the proposed converter are achieved by dual converter cells and the corresponding PF expression is derived. Besides, the inductors and transformers ratio is analyzed to ensure the high PF (>0.99) and the satisfactory input current harmonics (meet the IEC 61000-3-2 Class D limits) in the 100∼240 Vac input voltage range. The 100 W prototypes of the conventional buck and the proposed converters are built for experimental tests, which confirm the effectiveness of the proposed topology.

    Original languageBritish English
    Title of host publicationICPE 2019 - ECCE Asia - 10th International Conference on Power Electronics - ECCE Asia
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages1420-1427
    Number of pages8
    ISBN (Electronic)9788957083130
    StatePublished - May 2019
    Event10th International Conference on Power Electronics - ECCE Asia, ICPE 2019 - ECCE Asia - Busan, Korea, Republic of
    Duration: 27 May 201930 May 2019

    Publication series

    NameICPE 2019 - ECCE Asia - 10th International Conference on Power Electronics - ECCE Asia

    Conference

    Conference10th International Conference on Power Electronics - ECCE Asia, ICPE 2019 - ECCE Asia
    Country/TerritoryKorea, Republic of
    CityBusan
    Period27/05/1930/05/19

    Keywords

    • Bridgeless Buck-flyback
    • Dead angles eliminated
    • High PF
    • Switches integrated

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