Estimation of Transformer Parameters and Loss Analysis for High Voltage Capacitor Charging Application

Prasanth Thummala, Henrik Schneider, Ziwei Ouyang, Zhe Zhang, Michael A. E. Andersen

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    In a bi-directional DC-DC converter for capacitive charging application, the losses associated with the transformer makes it a critical component. In order to calculate the transformer losses, its parameters such as AC resistance, leakage inductance and self capacitance of the high voltage (HV) winding has to be estimated accurately. This paper analyzes the following losses of bi-directional flyback converter namely switching loss, conduction loss, gate drive loss, transformer core loss, and snubber loss, etc. Iterative analysis of transformer parameters viz., AC resistance, leakage inductance and stray capacitance of the HV winding will lead to a considerable reduction in converter losses. In this work, a 24 V to 2.5 kV bidirectional flyback converter has been implemented and the same has been used for loss calculation.
    Original languageEnglish
    Title of host publicationProceedings of ECCE Asia DownUnder 2013
    Publication date2013
    ISBN (Print)978-1-4799-0482-2
    Publication statusPublished - 2013
    EventECCE Asia DownUnder 2013 : 5th Annual International Energy Conversion Congress and Exhibition - Crown Convention Centre, Melbourne, Australia
    Duration: 3 Jun 20136 Jun 2013


    ConferenceECCE Asia DownUnder 2013
    LocationCrown Convention Centre


    • High voltage bi-directional converter
    • Capacitive load
    • AC resistance
    • Core loss
    • Stray capacitance
    • Leakage inductance


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