Maximum Efficiency Analysis and Design of Self-resonance Coupling Coils for Wireless Power Transmission System

Abstract

Self-resonance coupling is a new technology for wireless power transmission, which can transfer energy in middle distance. In this paper, the wireless transmission mechanism based on the coupling model of two spatial isolated coils was analyzed, and the relationship among efficiency frequency, distance and coil sizes was researched. Further more the maximum efficiency condition was obtained to optimize the design of self-resonance coupling system. Finally,a wireless power transmission prototype of resonant coupling was designed in this paper. And various coil groups were used to compare in this experiment. The result shows that the coils deliver the maximum energy when two hollow coils are in the state of resonance coupling, which quite verifies the theoretica research in this paper.