Wireless Electric Vehicle Charger

Abstract

Since the advent of electricity, we are mostly dependent on wires and batteries to provide power to movable devices. The cord can power only up to a certain distance, while the battery can only power up to a certain time period; hence, they inevitably accompany anxiety of range and time. It is important to overcome the above problems. This research aims to propose transmitter and receiver platforms of a wireless charger that can be used to charge electric vehicles wirelessly. The deployment of these platforms will be such that the transmitter is connected to an AC supply to generate a magnetic flux oscillating at high frequency, while the receiver platform will be connected to the vehicle in such a way that the air gap between the two platforms should be minimum. Standard inductive coupling results in relatively low efficiency (<30%), on the other hand, resonant inductive coupling results in higher efficiency (>75%) at an operating distance between transmit & receive coils of less than 10 cm. This technology enables charging of EVs in places where the vehicles usually have to stop like at traffic signals, parking, or where installing a plug-in charger is not possible. It also allows vehicles to charge even when they are moving. This mode of operation can be used to improve range and sufficient volume of battery storage. Dynamic charging will influence more people to use EVs and reduce fuel consumption. Also, the vehicle will need a lesser amount of battery capacity as the range of transportation is increased. The paper also deals with the MATLAB simulation of the proposed high-efficiency wireless power transfer.