Efficiency Characteristics and Equivalent Circuit of the Pick-Up Coil in Non-Contact Energy Transfer System

Abstract

In a Non-Contact Energy Transfer System which supplies continuous energy to movers by electromagnetic induction, the efficiency is low owing to low excitation impedance because of the wide air gap of the magnetic core in the pick-up coil. The excitation impedance can be increased by the resonance with a capacitor connected parallel to the pick-up coil. The resonant pick-up coil works as a high frequency constant current source for the load.
In this paper, are measured efficiencies of the experimental system and calculated ones of the equivalent circuit are described.