Analysis and optimization of coupled windings in magnetic resonant wireless power transfer systems with orthogonal experiment method

Xiao Yudi, Mao Xingkui, Lin Mao*, Zhe Zhang, Michael A. E. Andersen

*Corresponding author for this work

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Abstract

The coupled magnetic resonant unit (CMRU) has great effect on the transmitting power capability and efficiency of magnetic resonant wireless power transfer system. The key objective i.e. the efficiency coefficient kQ is introduced in the design of CMRU or the coupled windings based on the mutual inductance model. Then the design method with orthogonal experiments and finite element method simulation is proposed to maximize the kQ due to low precise analytical model of AC resistance and inductance for PCB windings at high- frequency. The method can reduce the design iterations and thereby can get more optimal design results. The experiments verified the design objective of kQ as well as the design method effectively. In the optimal PCB windings prototype at operating frequency of 4 MHz, the kQ and the maximum efficiency are increased by about 12% and 4% respectively.
Original languageEnglish
JournalElektronika ir Elektrotechnika
Volume23
Issue number6
Number of pages6
ISSN1392-1215
DOIs
Publication statusPublished - 2017

Keywords

  • Wireless power transfer
  • Magnetic resonant
  • Orthogonal experiments
  • Magnetic coupling structure optimization

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