WIRELESS POWER TRANSPORT SYSTEM WITH MULTIPLE RESONATORS

摘要

A wireless power transmission system having a plurality of resonators according to an embodiment of the present invention comprises: a source resonator to transmit power wirelessly according to a design frequency; a plurality of relay resonators magnetically coupled with the source resonator to receive and relay power; a receiving resonator to receive power from the relay resonators to supply power to a load; and a resonance control device to adjust values of capacitors included in the source resonator, the relay resonators, and the receiving resonator to maximize efficiency at the design frequency. According to the present invention, a maximum efficiency frequency shift phenomenon in the system arising from an increase in the number of resonators does not occur to optimize system operation at the system design frequency and improve a phenomenon of decreasing efficiency from rearranging the resonators. Additionally, changes in arrangement and distances of the resonators composing the system can be optimally matched without adjusting a load of a receiving unit, and power transmitted to a plurality of receiving units can be distributed at desired percentages by adjusting the capacitor values of the resonators.