Globally, there has been a rising interest towards the use of green technologies to protect environment and health of living beings. Vehicles running on fossil fuel cause a significant amount of air pollution. In order to reduce the vehicle caused air pollution, electric vehicles are coming up as one of the preferred alternatives. However, the major drawback of electric vehicles is the need to charge them frequently. Therefore, long distance travel with an electric vehicle is a challenge. Thus, it necessitates the need of an ecofriendly charging system for electric vehicles. An Electrical vehicle can make use of a power transfer system to charge the on-board Rechargeable Energy Storage System (RESS – the battery) or to provide power to the electric motor. It is also possible to use wireless power transfer to charge the batteries while stationary, using charging “pads”. Both of these solutions are adequate for charging at home or in car parks but still require the vehicle to stop in an appropriate location to charge the battery. We propose an ecofriendly wireless charging system for electric vehicle which enables wireless charging of the vehicle while running on the highways. The proposed system can also be used for charging of cars in the shopping malls and other parking places.
Moreover, the proposed charging system receives required electrical energy from solar PV system and wind turbines, installed along the highways. The solar PV system and wind turbines are connected to form a microgrid system and feeds generated electrical energy to wireless charging system. The surplus electrical energy may, either be fed back to the main grid or used for highway illumination. The wireless charging system also consists of air-core transformer with its primary winding below the highway surface and secondary mounted on the vehicle. The ac power from secondary passes through rectifier and dc-dc conversion stage to produce suitable dc voltage and current for the charging of battery unit.
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