POWER SUPPLYING APPARATUS

摘要

The present invention relates to a wireless power supply device which transfers power at a plurality of resonant frequencies. The present invention proposes a power supply device comprising: a source converting unit which converts an input voltage to a preset first voltage; and a wireless power supply unit which switches the first voltage from the source converting unit at at least one resonant frequency among at least two preset resonance frequencies and transfers the switched first voltage wirelessly.