Apparatus for providing energy in energy system

PURPOSE: An energy supply apparatus in an energy system is provided to have an effect of improving the energy transmission efficiency by collecting the leakage energy. CONSTITUTION: An energy supply apparatus comprises a transmission unit (105), a transmission coil unit (115), a reception coil unit (120), a receptor (130), a collection coil unit (135) and a collector (145). The transmission unit outputs the electric energy to supply to a first load. The transmission coil unit transmits the electric energy output from the transmission unit through the resonance and induction method. The reception coil unit receives the transmitted electric energy through the resonance and induction method. The receptor supplies the electric energy to the first load. The collection coil unit wirelessly collects the leakage energy generated in transmission and/or reception of the electric energy. The collector supplies the leakage energy to a second load. [Reference numerals] (105) Transmission unit; (130) Receptor unit; (145) Collector unit