Optimum magnetic solution for interoperable system for stationary wireless EV charging

Abstract

This paper discusses requirements and potential solutions for interoperable wireless charging systems for electric and plugin hybrid vehicles. Such technology is known as resonant magnetic induction charging, also referred to as wireless electric vehicle charging (WEVC). Future requirements for a WEVC system are: low cost, small package, high power transfer and interoperability.This paper discusses interoperability requirements as a key factor for successful deployment of WEVC systems. One key aspect analyzed in this paper is primary and secondary coils requirements as they relate to interoperability.Theoretical and practical studies have been conducted and a suggested interoperable solution is presented.

Interoperability Improvement for Wireless Electric Vehicle Charging System Using Adaptive Phase-Control Transmitter

“…Rectangular coil and DD coil are two widely used coil structures [4], [6]. Previous research reveals that the null points of power and efficiency cannot be eliminated when…”

“…Nowadays, various wireless electric vehicle charging (WEVC) products have been introduced and it is observed that the advantages of WEVC technology include providing automatic charging, increasing device mobility and reducing battery capacity [2]. However, poor interoperability [4], [5] is the bottleneck for WEVC systems. The issues of interoperability can be addressed from the following aspects:…”

Magnetic Leakage Field Study of a 7 kW Wireless Electric Vehicle Charging System

“…It was found that it is important to use proper simulation domain and region size, specific boundary conditions, a reasonable meshing setup and correct assumptions for material properties and coil currents. For the simulations of the WEVC system considered in this study, the magnetic coils, ferrite layers and shield plates were modelled using the actual material properties of the Litz wire, soft ferrite and aluminium parts provided by data sheets [15][16][17]. The excitations of the BP and VP coil currents used were based on a coil current measurement.…”

Modified mortar for wireless powered lighting systems

“…Although the employment of WPT to power LEDs is still uncommon, several papers exploring the effects of resonant coupling on the efficiency of wireless charging of EVs can be found in the literature 10–12 . For example, Tavakoli et al 13 have reported the possibility of using additives in the mortar to increase the power transfer efficiency in the wireless charging process of EVs.…”