Wireless charging

Mr.Chandra Kumar Sahu
Assistant Professor
Department of Electrical Engineering
Email – chandra.kumar.sahu@kalingauniversity.ac.in

A method called wireless charging transfers electricity without the use of physical hookups. Its convenience and adaptability have drawn a lot of interest from a variety of industries, altering the way that gadgets are powered, particularly in consumer electronics and electric cars.
How Wireless Charging Works
The most popular wireless charging method, inductive coupling, transfers energy from a charger (transmitter) to a device (receiver) via an electromagnetic field. The procedure is as follows:

Transmitter Coil: When an alternating current (AC) passes through a coil of wire inside the charging station or pad, a magnetic field is produced.
Receiver Coil: The device (smartphone, vehicle, etc.) has a corresponding coil that interacts with the magnetic field.
Energy Transfer: The battery is charged by means of a current that is induced in the receiver coil by the fluctuating magnetic field, as per Faraday’s law of induction.
Applications of Wireless Charging
Consumer Electronics: Wireless charging has become popular for smartphones, tablets, and wearables. Standards like Qi ensure compatibility across different manufacturers, enhancing user convenience. With wireless charging pads becoming ubiquitous, users no longer need to worry about plugging in cables.
Electric Vehicles (EVs): Electric vehicle wireless charging is becoming more and more popular. Cars can get electricity by parking over a wireless charging pad rather than plugging into a charging station. This technology enhances the convenience of EV ownership, particularly for autonomous vehicles.
Medical Devices: Wireless charging is advantageous for implanted medical equipment, such as pacemakers, because it removes the need for intrusive battery replacement operations. Wireless power also improves the durability and usability of various medical instruments.
Industrial Automation: In industries where robots and automated systems are used, wireless charging enables autonomous systems to recharge without human intervention, significantly increasing productivity. Drones and robots used in manufacturing and delivery systems can autonomously recharge using wireless stations.