Proceedings of the 2025 2nd International Conference on Electrical Engineering and Intelligent Control (EEIC 2025)

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Analysis of the Advantages and Disadvantages of Square and Circular Coils in Wireless Charging Systems for Electric Vehicles

Authors
Junhan Li1, Ning Si2, *, Qingrui Yu3
1Weifang Hansen School, Weifang, 261041, China
2The High School Affiliated to Renmin University of China International Curriculum Center, Beijing, 100020, China
3BFSU International Curriculum Centre, Beijing, 100089, China
*Corresponding author. Email: thomasningsi@gmail.com
Corresponding Author
Ning Si
Available Online 23 October 2025.
DOI
10.2991/978-94-6463-864-6_89How to use a DOI?
Keywords
Magnetic Coupling Inductive Wireless Charging System; Coupled Resonant Coils; Emi; Price; Impedance Matching
Abstract

As energy shortage and environmental pollution problems are becoming increasingly serious, Electric Vehicles (EVs) have drawn much more public attention. The charging technology of EVs has also developed, especially Wireless Power Transfer (WPT). Compared to a conductive charging system, its unique advantages are destined to make it the mainstream charging method for EVs in the future. The current relatively advanced method is a magnetic coupling inductive wireless charging system, and the coupled resonant coil is clearly one of the most important components of this structure. This paper aims to analyze the basic structure of magnetic coupling inductive wireless charging systems and the advantages and downsides of the circular and rectangular coils, respectively. The circular coil has more advantages in terms of EMI performance and price, while the rectangular coil has more advantages with regards to impedance matching. This research holds significant importance for optimizing the design of wireless charging systems, as it provides a comprehensive comparison of coil structures to enhance efficiency, reduce costs, and improve electromagnetic compatibility in future EV charging solutions.

Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 2025 2nd International Conference on Electrical Engineering and Intelligent Control (EEIC 2025)
Series
Advances in Engineering Research
Publication Date
23 October 2025
ISBN
978-94-6463-864-6
ISSN
2352-5401
DOI
10.2991/978-94-6463-864-6_89How to use a DOI?
Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Junhan Li
AU  - Ning Si
AU  - Qingrui Yu
PY  - 2025
DA  - 2025/10/23
TI  - Analysis of the Advantages and Disadvantages of Square and Circular Coils in Wireless Charging Systems for Electric Vehicles
BT  - Proceedings of the 2025 2nd International Conference on Electrical Engineering and Intelligent Control (EEIC 2025)
PB  - Atlantis Press
SP  - 1038
EP  - 1051
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-864-6_89
DO  - 10.2991/978-94-6463-864-6_89
ID  - Li2025
ER  -