Directional wireless power transmission apparatus using magnetic resonance induction

摘要

PURPOSE: A directional wireless power transmission device using magnetic resonance induction is provided to obtain constant power transmission efficiency regardless of the distance between a wireless power transmission device and a wireless charging device by using a Helmholtz coil. CONSTITUTION: A wireless power transmission device includes a pair of coils. The pair of coils has same radius(R) and the same number of winding. The pair of coils is separated as the radius. The pair of coils receives same current in the same direction from external power.