Wireless charging is a technique of transmitting electrical energy through air to a device for the purpose of energy replenishment.

Nikola Tesla, the founder of alternating current electricity, was the first to conduct experiments on wireless charging in the eighteen century, in 1899 he successfully transmitted 108 volts of high-frequency electrical energy over a distance of 25 miles to light 200 bulbs and run an electric motor. In 1901, Tesla constructed the Wardenclyffe Tower to channelize electrical energy worldwide without cables through the Ionosphere. However, due to technological limitations (e.g., low system efficiency), the idea had not been widely further developed and commercialized. At present, the wireless charging technology has tremendously advanced in terms of efficiency and functionality.

Wireless charging technology enables wireless electrical transfer from a electrical source (e.g., a charger) to a load (e.g., a mobile device) across an air gap, it provides ease of use and better user experience. Recently, wireless charging is undergone rapid evolution from theories towards being adopted in commercial products, especially mobile phones and portable devices.

Wireless charging technology has many benefits:
• Improves user-friendliness as the hassle of connecting cables is completely eradicated, different models of devices can use the same charger.
• It provides better product longevity and durability (e.g., dust and water resistant) for contact-free devices.
• It enhances flexibility, especially for the electronic devices in which batteries are replaced or charging cable is costly, hazardous, or infeasible (e.g., implanted sensors).
• Wireless charging provides energy on-demand, removing overcharging problem, minimizing cost of energy and loss of energy arising due to conduction through electrical cables.

Wireless charging technology will become predominant especially for consumer electronics and portable devices i.e mobile phones etc. In 2014, many leading smartphone manufacturers, e.g., Samsung, Apple and Huawei, released their products equipped with built-in wireless charging capability.

Written By:

Anshul Srivastava
UBS Chandigarh

admini-Wiz
Wireless charging is a technique of transmitting electrical energy through air to a device for the purpose of energy replenishment. Nikola Tesla, the founder of alternating current electricity, was the first to conduct experiments on wireless charging in the eighteen century, in 1899 he successfully transmitted 108 volts of high-frequency...