NON-CONTACT POWER-TRANSMISSION SYSTEM, AND METHOD FOR DESIGNING ANTENNA OF NON-CONTACT POWER-TRANSMISSION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a method for designing an antenna for realizing a high power transmission efficiency from an inter-antenna coupling coefficient determined by the physical size and layout of the antenna.SOLUTION: A non-contact power-transmission system comprises: a power-transmission antenna; an RF power source device 2 for supplying the power-transmission antenna with RF power of a resonance frequency f; a resonance capacitor connected in series with the power-transmission antenna; a power-receive antenna magnetically coupled with the power-transmission antenna; a load 5 connected with the power-receive antenna, and consuming electric power; and a resonance capacitor connected in series with the power-receive antenna. When the coupling coefficient between the power-transmission antenna and the power-receive antenna is represented by k, the internal resistance of the RF power source device 2 is represented by R, and the resistance of the load 5 is represented by R, the self inductance Lof the power-transmission antenna, and the self inductance Lof the power-receive antenna satisfy the following relational expressions.