Analysis and Simulation of Frequency Characteristic Based on
 Optimal Objective Parameter in Magnetically-Coupled
 Resonant Wireless Power Transfer System

doi:10.16183/j.cnki.jsjtu.2020.04.012

Abstract

Abstract: Magnetically coupled resonant wireless power transfer (MCR-WPT) has the advantages such as mid-range and high efficiency and shows great application potential. In this technology, the change of frequency has an important impact on the transmission performance of the system. Therefore, the analysis of frequency characteristics is of great significance to improve the performance of the system. The increase of resonant topological strategy is sending terminal, resulting from the variation of loads and transmission distance, is analyzed theoretically through the reflect impedance theory taking coil resistance into account in four topological structures. It is found that series-series topological structure has the most stable frequency property. Besides, this paper researches the relationship between optimal operating frequency and variations of loads, transmission distance in the desiable and undesiable cases by means of multual inductance theory. Modeling and analysis in MATLAB environment verify the correctness of the above theory. The interpolation method and the polynomial fitting are used to simulate and analyze the optimal operating frequency of transmission efficiency under ideal state. The results show that spline interpolation and 8th order polynomial fitting are the best, which can provide some references for improving the accuracy of frequency control in the later period.

Key words: magnetically coupled resonant (MCR); wireless power transfer (WPT); mutual inductance theory; optimal operating frequency; interpolation; polynomial fitting

CLC Number:

TM 74

FAN Xingming,JIA Erju,GAO Linlin,ZHANG Weijie,JIAO Ziquan,ZHANG Xin. Analysis and Simulation of Frequency Characteristic Based on Optimal Objective Parameter in Magnetically-Coupled Resonant Wireless Power Transfer System[J]. Journal of Shanghai Jiaotong University, 2020, 54(4): 430-440.

References

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Analysis and Simulation of Frequency Characteristic Based on Optimal Objective Parameter in Magnetically-Coupled Resonant Wireless Power Transfer System

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