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Wireless power transfer (WPT) is a promising technology for charging electric vehicles (EVs) as it is convenient, and less sensitive to the environmental conditions. Usually charging coils (pads) of WPT based EV charging systems are made of Litz wire, making coils bulky and expensive with relatively high copper losses. This paper investigates the use of copper foil based pad designs for WPT systems...
Based on magnetic induction, wireless power transfer have been proved to be promising in many applications, especially in EV charging systems. The coupling performance of loosely coupled transformers determines the overall feasibility of the whole systems. Considering volume, cost and coupling properties, a solenoid magnetic structure of 400mm∗600mm with a 200mm air gap is utilized to transfer power...
In this paper, a practical core loss calculation method based on the modified Steinmetz equation is proposed. It calculates the low-frequency losses and the high-frequency losses separately. By utilizing the curves of permeability versus DC bias provided by core vendors instead of plenty tests, the paper establishes a relation between the DC bias and the core losses. A novel model of minor loops is...
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