A voltage doubler circuit to extend the soft-switching range of dual active bridge converters

Zian Qin, Yanfeng Shen, Huai Wang, Frede Blaabjerg

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

    3 Scopus citations

    Abstract

    A voltage doubler circuit is realized to extend the soft-switching range of Dual Active Bridge (DAB) converters. No extra hardware is added to the DAB to form this circuit, since it is composed of the dc blocking capacitor and the low side full bridge converter, which already exist in DAB. With the voltage doubler, the DAB converter can achieve soft switching and high efficiency when the low side dc voltage is close to 2 pu (1 pu is the high side dc voltage divided by the transformer turn ratio), which can be realized only when the low side dc voltage is close to 1 pu by using the conventional phase shift modulation in DAB. Thus the soft switching range is extended. The soft switching boundary conditions are derived. A map to show the soft switching or hard switching in the full load and voltage range is obtained. The feasibility and effectiveness of the proposed method is finally verified by experiments.

    Original languageBritish English
    Title of host publication2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages300-306
    Number of pages7
    ISBN (Electronic)9781509053667
    DOIs
    StatePublished - 17 May 2017
    Event32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017 - Tampa, United States
    Duration: 26 Mar 201730 Mar 2017

    Publication series

    NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

    Conference

    Conference32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017
    Country/TerritoryUnited States
    CityTampa
    Period26/03/1730/03/17

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