TY - JOUR
T1 - Performance Comparison between Three-Coil and Four-Coil Based Wireless Power Transfer
AU - Lee, Kisong
AU - Choi, Hyun Ho
N1 - Publisher Copyright:
© 2020, Korean Institute of Communications and Information Sciences. All rights reserved.
PY - 2020/11
Y1 - 2020/11
N2 - 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.
AB - 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.
KW - Efficiency
KW - Equivalent circuit model
KW - Magnetic resonance
KW - Performance comparison
KW - Wireless power transfer
UR - http://www.scopus.com/inward/record.url?scp=85189326365&partnerID=8YFLogxK
U2 - 10.7840/kics.2020.45.11.1817
DO - 10.7840/kics.2020.45.11.1817
M3 - Article
AN - SCOPUS:85189326365
SN - 1226-4717
VL - 45
SP - 1817
EP - 1822
JO - Journal of Korean Institute of Communications and Information Sciences
JF - Journal of Korean Institute of Communications and Information Sciences
IS - 11
ER -