Research on Wireless Power Transfer for Electronic Device

In this paper, we research how to transfer 5 W power up to 15 mm distance for small electronic devices charging using magnetic resonance wireless power transfer (WPT). First between the input voltage control method and the frequency control method, the suitable method for 5 W wireless power transfer system is selected by experiment, and experiment by changing the distance from 0 mm to 15 mm. Second, we will experiment with wireless power transfer for powering large electronic devices. Experimental results show that the frequency control method is more suitable for charging small electronic device under variable charging distance conditions, and that 5 W power transfer is possible within distance of 15 mm. We also confirmed that 200 W power is transfer at distance of 100 mm for medium and large electronic devices.