Affiliation of Author(s):机电学院

Journal:JOURNAL OF POWER ELECTRONICS

Key Words:Intermediate coil Magnetically coupled resonant Spatial scales Stable transmission characteristics Wireless power transfer

Abstract:In magnetically coupled resonant (MCR) wireless power transfer (WPT) systems, the introduction of additional intermediate coils is an effective means of improving transmission characteristics, including output power and transmission efficiency, when the transmission distance is increased. However, the position of intermediate coils in practice influences system performance significantly. In this research, a three-coil MCR WPT system is adopted as an exemplification for determining how the spatial position of coils affects transmission characteristics. With use of the fundamental harmonic analysis method, an equivalent circuit model of the system is built to reveal the relationship between the output power, the transmission efficiency, and the spatial scales, including the axial, lateral, and angular misalignments of the intermediate and receiving coils. Three cases of transmission characteristics versus different spatial scales are evaluated. Results indicate that the system can achieve relatively stable transmission characteristics with deliberate adjustments in the position of the intermediate and receiving coils. A prototype of the three-coil MCR WPT system is built and analyzed, and the experimental results are consistent with those of the theoretical analysis.

ISSN No.:1598-2092

Translation or Not:no

Date of Publication:2019-01-01

Co-author:Chen, Lu,cll,Ye, Weiwei,Zhang, Weipeng

Correspondence Author:Xuling Chen