Analysis of quasi-square-wave operation of DAB DC–DC converter

R.T. Naayagi, Andrew Forsyth, R. Shuttleworth

    Research output: Contribution to journalLetterpeer-review


    This work makes a novel contribution to the analysis of quasi-square-wave operationof dual-active bridge (DAB) converter by deriving equations for root mean square(RMS) and average device currents and RMS and peak inductor/transformer currents –these equations are useful in predicting device and passive component losses. Quasisquare-wave operation of the DAB converter is verified through Saber simulations andexperimentation, validating the mathematical analysis. It is observed that quasi-squarewavemode improves average power transfer and the converter efficiency besidesenhancing its soft-switching region without introducing additional passive components.The effect of quasi-square-wave on RMS and peak currents of devices andtransformer/inductor is also discussed.
    Original languageEnglish
    JournalInternational Journal of Electronics Letters
    Issue number1
    Publication statusPublished - Aug 2014


    • dual-active bridge; quasi-square-wave; average current; RMS current; peak current; dead-time; soft-switching


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