Performance Comparison between Three-Coil and Four-Coil Based Wireless Power Transfer 


Vol. 45,  No. 11, pp. 1817-1822, Nov.  2020
10.7840/kics.2020.45.11.1817


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  Abstract

In this paper, we formulate three-coil and four-coil wireless power transfer systems mathematically using an equivalent circuit model, and derive a power transfer efficiency for each system. We fabricate inductive and resonant coils with spiral shape, and verify the accuracy of our analysis via efficiency measurements using a vector network analyzer under a variety of environments. Through the comparison of the performance of the two systems, we also confirm that there is a condition where each system shows better performance, which provides the effective use for the additional resonant coil. For example, the four-coil system achieves higher power transfer efficiency than the three-coil system if the distance between resonant coils is longer or the distance between inductive and resonant coils is shorter. Otherwise, the three-coil system outperforms the four-coil system.

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  Cite this article

[IEEE Style]

K. Lee and H. Choi, "Performance Comparison between Three-Coil and Four-Coil Based Wireless Power Transfer," The Journal of Korean Institute of Communications and Information Sciences, vol. 45, no. 11, pp. 1817-1822, 2020. DOI: 10.7840/kics.2020.45.11.1817.

[ACM Style]

Kisong Lee and Hyun-Ho Choi. 2020. Performance Comparison between Three-Coil and Four-Coil Based Wireless Power Transfer. The Journal of Korean Institute of Communications and Information Sciences, 45, 11, (2020), 1817-1822. DOI: 10.7840/kics.2020.45.11.1817.

[KICS Style]

Kisong Lee and Hyun-Ho Choi, "Performance Comparison between Three-Coil and Four-Coil Based Wireless Power Transfer," The Journal of Korean Institute of Communications and Information Sciences, vol. 45, no. 11, pp. 1817-1822, 11. 2020. (https://doi.org/10.7840/kics.2020.45.11.1817)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880