Complete Science and Technology Behind Wireless Charging

 

Science Behind Wireless Charging

From the current decade wireless charging is becoming popular and it's popping up in cafes, fast food restaurants,even  in IKEA furniture. Although there are various competing standards for wireless charging, inductive charging is the most popular form of wireless charging for mobile charging.

Getting to the bottom of the inductive charging we need to go all the way in 1831 when a scientist named Michael Faraday introduced the principles of electric current and  magnetic inductance by the late 1800 Nicola Tesla utilized this idea and demonstrated of phenomenon of resonant inductive coupling.

Due to limitations of the technology related to circuit manufacturing during that time, wireless charger came into reality in 21st century and and wireless charging mobile phones came in 2008 with the launch of some devices like Nokia lumia,Samsung galaxy series and apple iPhone wireless charging became popular.

Inside a Wireless charger

An inductive charger consist of  only a few parts mainly AC current from the power source an electrical oscillatory circuit and a transmission coil a transmission coil is a tightly winded copper element. As the AC current passes through it,electric current  produces magnetic flux which is based on the number of coils in the element of copper.

On the inductive receiver present in mobile or other device the process is basically the same but  opposite in the receiving device.The coil of same type is embedded in the charging circuit and alternating magnetic field is picked up by receiving copper coil and the current is induced.The induced current that reaches mobile device is AC(alternating current) so first it is converted with a built in rectifier to DC(direct current) which actually charges the battery of the smartphone.

Wireless charging technology of today is not perfect as it has many flaws first that it works only through a certain distance which is very less.Companies like Pi charging are solving this problem, recently they in designed a wireless charger which can charge mobile devices as far as half meter. Another problem arise due to inefficiency of wireless charging, it consumes more power than conventional charging method, but don’t worry scientist and engineers all across the globe are trying to solve this problem