Your browser does not support JavaScript!
http://iet.metastore.ingenta.com
1887

access icon openaccess Optimal single relay position of a 3-coil wireless power transfer system

It seems a good idea to place the relay coil in the middle to maximise the load voltage in a 3-coil wireless power transfer system; however, no literature points out clearly the reason and the necessary conditions that it holds. In this study, the complex relationship between coupling coefficients and distances is approximated by a simple polynomial, and then a rigorous analysis is carried out to show clearly that the optimal relay coil position of a 3-coil wireless power transfer system is just the middle of the drive loop and the load loop under the symmetrical condition that coil quality factors of the drive loop and the load loop are equal, and furthermore the middle is not the optimal position if the symmetrical condition is destroyed. Finally, the theoretical results are confirmed by the physical experiments.

References

    1. 1)
    2. 2)
    3. 3)
    4. 4)
    5. 5)
    6. 6)
    7. 7)
      • 14. Sadiku, M.N.O.: ‘Elements of electromagnetics’ (Saunders College Pub, Fort Worth, TX, USA, 1994, 2nd Edn.).
    8. 8)
    9. 9)
    10. 10)
    11. 11)
    12. 12)
      • 2. Niu, W., Wang, J., Chu, J., et al: ‘Maximum load power analysis in 3-coil wireless power transmission systems’. Presented at Symp. on Power Electronics & Electrical Drives, Shanghai, 2013.
    13. 13)
      • 13. Thompson, M.T.: ‘Inductance calculation techniques – part ii: approximations and handbook methods’, Power Control Intell. Motion, 1999, pp. 111, https://thompsonrd.wordpress.com/papers/.
    14. 14)
    15. 15)
http://iet.metastore.ingenta.com/content/journals/10.1049/joe.2016.0082
Loading

Related content

content/journals/10.1049/joe.2016.0082
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading
This is a required field
Please enter a valid email address