Electrical Engineering

, Volume 101, Issue 3, pp 1075–1082 | Cite as

Research on optimal distribution of the magnetic powder in wireless power transfer

  • Meijun Xing
  • Pengcheng Wang
  • Yuhui Xu
  • Yang Yang
  • Xuebin Feng
  • Jin XuEmail author
Original Paper


Wireless power transfer system usually has the problems of low efficiency and small mutual inductance, and a scheme of variable mutual inductance coupling based on quantitative adjustable magnetic powder is described in this paper. Firstly, the relationship among mutual inductance, magnetic permeability and transmission efficiency between two coils is concluded according to the transformer principle and magnetic Ohm’s law; secondly, simulation analysis of the magnetic powder filled in the gap between the two coils is carried out to illustrate the best design. An experimental prototype is constructed to verify the effectiveness of the proposed WPT topology and the optimal magnetic circuit. The system efficiency is the highest with filling the magnetic powder uniformly in the transmitter’s center and the receiver’s edge, which is 16.4% higher than the traditional system. The theoretical calculation and simulation results are consistent with the previous optimization scheme, which provides a theoretical basis for the study of coil tuning and enhancing coil mutual inductance.


Wireless power transfer (WPT) Variable magnetic resonance Adjustable magnetic powder Mutual inductance 



  1. 1.
    Fan X, Xiaoyong MO, Xin Z (2015) Research status and application of wireless power transmission technology. Proc CSEE 35(10):2584–2600Google Scholar
  2. 2.
    Li J (2017) Research progress of wireless power transmission technology and the related problems. In: Advances in materials, machinery, electronics advances in materials, machinery, electronics (AMME 2017), p 090023Google Scholar
  3. 3.
    Zhu Q, Wang L, Liao C (2014) Compensate capacitor optimization for kilowatt-level magnetically resonant wireless charging system. IEEE Trans Ind Electron 61(12):6758–6768CrossRefGoogle Scholar
  4. 4.
    Guo S et al. (2017) Design of wireless power transmission system based on magnetic coupling resonant for the capsule endoscopy. In: IEEE international conference on mechatronics and automation IEEE, pp 23–28Google Scholar
  5. 5.
    Liu Z, Zhong Z, Guo YX (2017) In vivo high-efficiency wireless power transfer with multisine excitation. IEEE Trans Microw Theory Tech 99:1–11Google Scholar
  6. 6.
    Mohamed AAS et al. (2016) Optimal design of high frequency H-bridge inverter for wireless power transfer systems in EV applications. In: IEEE, international conference on environment and electrical engineering IEEEGoogle Scholar
  7. 7.
    Miller JM, Onar OC, Chinthavali M (2015) Primary-side power flow control of wireless power transfer for electric vehicle charging. IEEE J Emerg Sel Top Power Electron 3(1):147–162CrossRefGoogle Scholar
  8. 8.
    Jun Fei Z et al (2016) Wireless power transfer system based on toroidal metamaterials. Acta Phys Sin 65(16):168801. CrossRefGoogle Scholar
  9. 9.
    Le HT et al (2018) High-Q 3D microfabricated magnetic-core toroidal inductors for power supplies in package. IEEE Trans Power Electron 99:1Google Scholar
  10. 10.
    Feng H et al (2017) A dual-side detuned series-series compensated resonant converter for wide charging region in wireless power transfer system. IEEE Trans Ind Electron 99:1Google Scholar
  11. 11.
    Kan T et al (2018) Integrated coil design for EV wireless charging systems using LCC compensation topology. IEEE Trans Power Electron 99:1Google Scholar
  12. 12.
    Li Y et al (2018) Dual-phase-shift control scheme with current-stress and efficiency optimization for wireless power transfer systems. IEEE Trans Circuits Syst I Regul Pap 99:1–12CrossRefGoogle Scholar
  13. 13.
    Li S, Mi CC (2015) Wireless power transfer for electric vehicle applications. IEEE J Emerg Sel Top Power Electron 3(1):4–17CrossRefGoogle Scholar
  14. 14.
    Lee G et al (2016) A reconfigurable resonant coil for range adaptation wireless power transfer. IEEE Trans Microw Theory Tech 64(2):624–632CrossRefGoogle Scholar
  15. 15.
    Xu J, Liu L, Yu P (2018) Research on the system characteristics of radial offset based on double LCCL. Electr Eng 100(2):711–720CrossRefGoogle Scholar
  16. 16.
    Kaneko Y, Abe S (2013) Technology trends of wireless power transfer systems for electric vehicle and plug-in hybrid electric vehicle. In: IEEE, international conference on power electronics and drive systems, pp 1009–1014Google Scholar
  17. 17.
    Babic S, Akyel C (2017) Calculation of mutual inductance and magnetic force between two thick coaxial Bitter coils of rectangular cross section. IET Electr Power Appl 11(3):441–446CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of EngineeringNanjing Agricultural UniversityNanjingChina
  2. 2.Information Science and EngineeringCentral South UniversityChangshaChina
  3. 3.College of EngineeringVirginia TechBlacksburgUSA
  4. 4.Institute of Electronical EngineeringXi’an Jiaotong UniversityXi’anChina

Personalised recommendations