power transmission system

ZHENG Pan-long1，CHI Dong-xiang2

（1. School of Electrics Engineering，Shanghai Dianji University，Shanghai 200240，China；

2. School of Electrons & Information，Shanghai Dianji University，Shanghai 200240，China）

Abstract：Aiming at overcoming the problems of the two coils must rely on very close and a relatively stationary position caused by Qistandard based on the electromagnetic induction charging technology，the principle and the model of wireless power transfer（WPT）technology were studied，and several factors which influence the efficiency of power transmission were pointed out. A transmitter coil ofWPT system were designed and made in order to increase the distance of the WPT system and generate a wide range of magnetic field so that the receiver can move in a wider range. And the global receiver coil was used as the receiving coil to increase the usefulness of the system.The results of the experiments indicate that the system can work properly and the resonance point of the system is found.Also，it can be found that the transmission of electrical energy is the most in that working state. At the same time，the transmission distance is longer.

Key words：wireless power transfer；magnetic resonance；coil；resonant point