Improved Efficiency of Inductive Power Transfer in Misalignment Conditions with Multi Coil Design

Main Article Content

P. B. Laksono
M. Alaydrus


In charging process of electric vehicle, a misalignment between the transmitter (Tx) and receiver (Rx) coupling  structure decreases the efficiency of the wireless power transfer. In inductive power transfer system, misalignment reduces the effective coupling between the Tx and Rx coils. In this work, based on previous multiple coil structures, a new multi coil design in proposed to increase the efficiency of the power transfer. Here, a multi coil structure with two rectangular and four spiral coils is designed with the overall dimension of the coil structure 26.5 cm x 36.5 cm. The measurement shows, that for coil distance below 10.3 cm and a lateral misalignment of maximal 10 cm (27.4%), the efficiency of the designed multi coil structure is better compared to previous coil structures. However for larger coil distance or larger misalignment, the efficiency of the new coil structure deteriorates significantly.


Download data is not yet available.

Article Details

How to Cite
Laksono, P., & Alaydrus, M. (2019). Improved Efficiency of Inductive Power Transfer in Misalignment Conditions with Multi Coil Design. Advanced Electromagnetics, 8(1), 30-36.
Research Articles
Author Biography

M. Alaydrus, Mercu Buana University

Department of Electrical Engineering


  1. L. Zhao, D. Thrimawithana, and U. Madawala, "A Hybrid Bi-directional Wireless EV Charging System Tolerant to Pad Misalignment," IEEE Trans. Ind. Electron., vol. 64, no. 99, pp. 7079–7086, 2017.
    View Article

  2. K. Fotopoulou and B. W. Flynn, "Wireless Power Transfer in Loosely Coupled Links : Coil Misalignment Model," IEEE Journals Mag., vol. 47, no. 2, pp. 416–430, 2011.
    View Article

  3. X. Mou and H. Sun, "Wireless Power Transfer : Survey and Roadmap," in 2015 IEEE 81st Vehicular Technology Conference (VTC Spring), 2015, no. 2, pp. 1–5.
    View Article

  4. K. A. Kalwar, S. Mekhilef, M. Seyedmahmoudian, and B. Horan, "Coil Design for High Misalignment Tolerant Inductive Power Transfer System for EV Charging," MDPI (Multidisciplinary Digit. Publ. Institute)- Energies, vol. 9, no. 11, pp. 12–17, 2016.
    View Article

  5. M. L. Ferraro, "Design and Control of Inductive Power Transfer System for Electric Vehicle Charging," Universite de Toulouse, Laplace,France, 2017.

  6. X. Wei, Z. Wang, and H. Dai, "A Critical Review of Wireless Power Transfer via Strongly Coupled Magnetic Resonances," MDPI (Multidisciplinary Digit. Publ. Institute)- Energies, vol. 7, no. 7, pp. 4316–4341, 2014.
    View Article

  7. C. Carretero, "Coupling Power Losses in Inductive Power Transfer Systems with Litz-Wire Coils," IEEE Trans. Ind. Electron., vol. 64, no. 6, pp. 4474–4482, 2017.
    View Article

  8. X. Lu, P. Wang, D. Niyato, D. I. Kim, Z. Han, and C. Engineering, "Wireless Charging Technologies : Fundamentals, Standards, and Network Applications," IEEE Commun. Surv. Tutorials, vol. 18, no. 2, pp. 1413–1452, 2016.
    View Article

  9. Lu,Xiao, D. Nyato, P. Wang, D. In Kim, and Z. Han, "Wireless Charger Networking For Mobile Device: Fundamentals,Standards, and Applications," IEEE Wirel. Commun., vol. 22, no. 2, pp. 126–135, 2015.
    View Article

  10. M. Budhia, J. T. Boys, and G.A. Covic, "Development of a Single-Sided Flux Magnetic Coupler for Electric Vehicle IPT Charging Systems," IEEE Trans. Ind. Electron., vol. 60, no. 1, pp. 318– 328, 2013.
    View Article

  11. X. Qu, Y. Jing, H. Han, S. C. Wong, and C. K. Tse, "Higher Order Compensation for Inductive-Power- Transfer Converters with Constant-Voltage or Constant-Current Output Combating Transformer Parameter Constraints," IEEE Trans. Power Electron., vol. 32, no. 1, pp. 394–405, 2017.
    View Article

  12. M. Dehghanian, A. Namadmalan, and M. Saradarzadeh, "Optimum Design for Series-Series Compensated Inductive Power Transfer Systems," in 8th Power Electronics, Drive Systems & Technologies Conference (PEDSTC 2017), 2017, no. 2.

  13. P. Raval, D. Kacprzak, and A. Hu, "Computational Finite Element Software Assisted Development of a 3D Inductively Coupled Power Transfer System," Adv. Electromagn., vol. 2, no. 3, pp. 11–17, 2013.
    View Article

  14. S. Kuzey, S. Balci, and N. Altin, "Design and analysis of a wireless power transfer system with alignment errors for electrical vehicle applications," Int. J. Hydrog. Energy xxx Elsevier, pp. 1–12, 2017.

  15. C. Nataraj, S. Khan, M. H. Habaebi, and A. G. A. Muthalif, "Analysis of Mutual Inductance and Coupling Factor of," ARPN J. Eng. Appl. Sci., vol. 12, no. 13, pp. 4007–4012, 2017.

  16. B. H. Waters, B. J. Mahoney, G. Lee, and J. R. Smith, "Optimal Coil Size Ratios for Wireless Power Transfer Applications," in IEEE International Symposium on Circuits and Systems (ISCAS), 2014, vol. 1, no. 1, pp. 2045–2048.
    View Article

  17. Z. Luo and X. Wei, "Analysis of Square and Circular Planar Spiral Coils in Wireless Power Transfer System for Electric Vehicles," IEEE Trans. Ind. Electron., vol. 65, no. 1, pp. 331–341, 2018.
    View Article