Abstract
To provide safe and flexible power transfer to electric vehicles (EVs), wireless charging systems have been introduced. By improving the overall system efficiency of wireless charging systems for EVs, the range anxiety of EVs can be significantly reduced. In this paper, a comparative characteristic analysis is carried out between circular and double D (DD) power pads for EV wireless charging systems. The Society of Automotive Engineers (SAE) recommended practice J2954 is followed for designing physical dimension of these power pads. Finite Element Analysis (FEA) tool ANSYS Maxwell 3D is used for simulation. Parameters such as coupling coefficient and mutual inductance are evaluated for each type of power pads by applying vertical and horizontal misalignment. It is found that DD power pads exhibit promising characteristics for EV wireless charging systems.
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