Abstract
Generally, the transfer power of wireless power transfer (WPT) system reduces significantly with the increase of distance and angle between transmitting and receiving coils in traditional WPT system. Experiments with two transmitters in the magnetic resonance coupling WPT system have been shown that it can enlarge transfer power and create a stable region in power transfer efficiency in a certain space. However, two transmitters have a limited transfer power comparing to the three-dimensional WPT. In this paper, a model of WPT system with three-dimensional transmitters (3DT-WPT), which are perpendicular to each other and so cover three dimensional spaces, is proposed to overcome the drawbacks mentioned above and the 3DT-WPT system via magnetic resonance coupling is designed to verify the proposed model. The diversity of the characteristics of the transfer power is observed through changing the distance and normal angle between transmitting and receiving coils. Analysis and experiment results show that the proposed method has better performance than the two transmitters.
Published Version
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