Abstract:
In this paper, a novel trapezoidal multi-coil antenna
is proposed to mitigate lateral misalignment in wireless charging
application of electric vehicles (EVs). The proposed coil antenna
used at the transmitter is optimized to improve stability of induced voltage which intern is expected to provide a stable power
transfer efficiency over a wide range of vehicle’s misalignment.
The proposed design adopts an isosceles trapezoid shape after
analytical optimization and consists of three series connected
coils placed at the top faces of the structure. The magnetic field
distribution originated from this complex geometry is analytically
modeled and optimized to obtain wider uniformity in the induced
voltage of the receiver coil as compared to a conventional planar
antenna. The design is verified using commercial EM software
and results are corroborated. The results show that the proposed
antenna provides enhanced tolerance towards misalignment is
proved to be a potential design for wireless powering application
of EVs.
