Demonstration of a Compact Hard-Switched 3.5 kW DC/DC Converter utilizing Planar Magnetics optimized for low Capacitive Loss

Christian Oestergaard*, Claus S. Kjeldsen, Morten Nymand

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Abstrakt

It is necessary to accurately determine the power losses in a converter to obtain a high efficient design. This paper presents an in-depth analysis of all the power losses in a converter. The capacitive loss of the transformer and switches is investigated. A highly efficient 7:1 planar transformer is presented and the design is carefully interleaved to provide a small differential-mode capacitance and AC-resistance. Very accurate finite element simulations of the transformer equivalent circuit parameters are performed using Ansys Maxwell. A compact 3.5kW hard-switched isolated full-bridge forward converter is constructed with a power density of 9.9kW/L when the heatsink is excluded and 6.4kW/L when the heatsink is included. The calculated and measured peak efficiency of the converter is in close agreement with 98.0% and 97.7% respectively, thereby proving the accuracy of the power loss calculations.

OriginalsprogEngelsk
Titel2021 23rd European Conference on Power Electronics and Applications, EPE 2021 ECCE Europe
Antal sider10
ForlagIEEE
Publikationsdato6. sep. 2021
ISBN (Elektronisk)978-9-0758-1537-5
StatusUdgivet - 6. sep. 2021
Begivenhed23rd European Conference on Power Electronics and Applications, EPE 2021 ECCE Europe - Ghent, Belgien
Varighed: 6. sep. 202110. sep. 2021

Konference

Konference23rd European Conference on Power Electronics and Applications, EPE 2021 ECCE Europe
Land/OmrådeBelgien
ByGhent
Periode06/09/202110/09/2021

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