Transformer Analysis for Wireless Power DC-DC Converters


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Abstract


This paper presents the analysis of two different types of transformer structures used in wireless power applications. Conventional litz wire windings are compared to planar windings in terms of AC/DC performance ratio, coupling and inductance. Planar and litz wire transformer arrangements are proposed. A 6W LLC wireless power converter is used to compare the different transfomer structures. Finite element anlysis is used to determine the transformer coupling coefficient and AC/DC ratios. The simulation results are validated by experimental measurements
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Keywords


Wireless Transfomer; LLC Converter; AC/DC Ratio; Coupling Factor; Wireless Charging

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