Impedance matching analysis of magnetic resonance coupled power transfer system

  • 1 Dept. of Electronics Engineering, Kaunas University of Technology, Lithuania


Remote Electric Vehicles (EV) charging could become a viable alternative to cable systems. This paper is dedicated to the ana lysis of the Strongly Coupled Magnetic Resonance (SCMR) serial-to-serial topology aimed at establishing the impedance matching and obtains the maximum efficiency and power transfer coefficient. The research was done by using a model of equivalent circuits, experimental investigation and finite-element modeling of the mutual inductance. Upon generalizing the results obtained from the analytical and experimental research as well as 3D modelling of magnetic fields using Comsol Multiphysics, the interrelationships between internal resistance of voltage source and load resistance, characteristic and loss resistances as well as the distance between coils (the strength of magnetic coupling) necessary to ensure maximum efficiency and power transfer coefficient were established. The results of exp erimental research and modelling of the active power transfer coeff icient were presented.



  1. B. Schiniielling, S. G. Cimen, U. O. Vosshagen, F. Turki, Layout and Operation of a Non-Contact Charging System for Electric Vehicles. In Proceedings of the 15th International Power Electronics and Motion Control Conference (EPE/PEMC). Novi Sad, Serbia (2012). DOI: 10.1109/EPEPEMC.2012.6397460
  2. S. S. Valtchev, E. N. Baikova, L. R. Jorge, Electromagnetic Field as the Wireless Transporter of Energy. Facta Universitatis Ser. Electrical Engineering, 25, no. 3, p. 171–181 (2011). DOI: 10.2298/FUEE1203171V
  3. A. Karalis, J. D. Joannopoulos, M. Soljacic, Efficient wireless non-radiative mid-range energy transfer. Annals of Physics 323, no. 1, p. 34–48 (2008). DOI: 10.1016/j.aop.2007.04.017
  4. S. Das Barman, A, W. Reza, N. Kumar, M. E. Karim, A. Munir, Wireless powering by magnetic resonant coupling: Recent trends in wireless power transfer system and its applications. Renewable & Sustainable Energy Reviews, 51, p. 1525–1552 (2015). DOI: 10.1016/j.rser.2015.07.031
  5. X. L. Huang, W. Wang, L. L. Tan, J. M. Zhao, Y. L. Zhou, Study of Transmission Performance on Strong Coupling Wireless Power Transfer System in Free Position. In Proceedings of the Progress in Electromagnetics Research Symposium. Moscow, Russia, p. 669–674 (2012). ISSN: 1559-9450.
  6. P. R. Wilson, A. D. Brown, Effective Modelling of Leakage Inductance for use in Circuit Simulation. In Proceedings of the 23rd Annual IEEE Applied Power Electronics Conference and Exposition. England p. 391–395 (2008). ISSN: 1048-2334.
  7. L. L. Tan, X. L. Huang, Efficiency Analysis and Optimization on Magnetic Resonance Coupled Wireless Transfer System. In Proceedings of the International Conference on Advanced Design and Manufacturing Engineering. Guangzhou, China, p. 1345–1348 (2011). DOI: 10.4028/
  8. X. Z. Wei, Z. S. Wang, H. F. Dai, Critical Review of Wireless Power Transfer via Strongly Coupled Magnetic Resonances. Energies 7, p. 4316–4341 (2014). DOI: 10.3390/en7074316
  9. S. Wang, Z. Hu, C. Rong, C. Lu, X. Tao, J. Chen, M. Liu, Optimisation analysis of coil configuration and circuit model for asymmetric wireless power transfer system. IET Microw. Antennas Propag. 12, p. 1132-1139 (2018). DOI: 10.1049/iet-map.2017.0539

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