Wireless Electric Vehicle Charging Stations (WEVCS) Technology

Wireless electric vehicle charging stations (WEVCS) technology is charging an electric car without involving cables that are directly related to the vehicles system. Wireless charging is done without a connector. The location of wireless charging is called a wireless electric vehicle charging station. There is no plug on WEVCS. Wireless electric charger technology for electric cars is a recent development for charging batteries. The basic principle of an electric car charging or wireless charger system is the same as the working principle of the transformer. One of the advantages of wireless charger is that charging an electric car (vehicle) becomes safer and more convenient for users.

Short Working Principle

If the transformer has a primary and secondary side, then charging without WEVCS cable has a transmitter side and a receiver side. If the transformer has a primary (coil) winding and secondary winding, the wireless charging of an electric car also consists of a transmitter winding and receiver winding.

However, wireless charging of electric cars changes the parameters of alternating current (AC) from low frequency 50Hz to high frequency, where it does not occur in the transformer. High-frequency AC power is supplied to the transmitter coil, then the alternating magnetic field is formed. This field then induces the receiver winding so that a voltage appears on the receiver winding. This voltage is used to charge the vehicle battery.

The most important thing in wireless charging or wireless charging to remain efficient is to maintain the frequency of resonance between the transmitter and receiver. In order for the resonance frequency to be maintained, compensation networks are added on both sides.

Early History of Wireless Charging

Wireless charging technology was initiated by Nikola Tesla’s research around 1891. At that time he made the Tesla coil. The aim of his research is to develop a wireless power transmission system (wireless). Tesla then built the Wardenclyffe Tower as a high-capacity, high-capacity wireless energy transmission station. Unfortunately, the tower was dynamited and destroyed on July 4, 1917.

Resonant Inductive Wireless Charging

This wireless electric vehicle or car charger station is basically a resonator with a high quality factor transmitting energy at a much higher rate. Because it operates at resonance, even with weaker magnetic fields, we can transmit as much energy as transfer capacity as at IWC. Power can be transferred remotely wireless. Maximum power transfer through the air occurs when the winding of the transmitter and receiver is adjusted so that the frequencies of the two resonant coils must match. So in order to get a good resonance frequency, an additional series-parallel combination compensation network is added to the transmitter and receiver coils. The additional compensation network on this electric car charger must adjust the increase in resonant frequency while also reducing additional losses. RIWC operating frequency is between 10 to 150 kHz.