Design of wireless battery charger using near-field induction method

Wireless power transfer system allows electric current to flow from one device to another without intermediate copper wire. This technology facilitates the battery charging process on electronic tools that have relatively little power. Wireless power transfer technology utilizes properties of magnetic induction between transmitter and receiver coils. The efficiency of wireless energy transfer depends on the distance between the coils and their frequency. In this paper successfully designed wireless power charging that work at a frequency of 60.606 kHz using near-field method and flat pancake wheeler coil types. Optimal efficiency of 41.06% was obtained when the distance between the coils is 2cm.