Abstract
With the rapid development of wireless power transmission (WPT) technology and the demand for a wide range of applications, the common two-coil system is becoming increasingly mature. However, the monotonous structure of two-coil systems limits their development. By incorporating relay coils, the distance of power transmission, efficiency, and electromagnetic field (EMF) leakage can be effectively improved. In this paper, the three-coil system is analyzed, and the relay coil parameters are optimized by an evolutionary algorithm. After that, based on the coil optimization, the compensation capacitance of the relay coil is analyzed and an analytical formula of the compensation capacitance of the optimized relay coil is obtained. The results show that the parameter-optimized system reduces current by 86.9%, increases efficiency by 10%, and suppresses EMF leakage by 18 dB. Meanwhile, the capacitor optimization further improves the transmission efficiency of the system.
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The data that support the findings of this study are available from the corresponding author upon reasonable request.
References
Patil, D., McDonough, M.K., Miller, J.M., Fahimi, B., Balsara, P.T.: Wireless power transfer for vehicular applications: overview and challenges. IEEE T. Transp. Electr. Magazine. 4(1), 3–37 (2018)
Chen, L.J., Boys, J.T., Covic, G.A.: Power management for multiple-pickup IPT systems in materials handling applications. IEEE J. Em. Sel. Top P. Magazine. 3(1), 163–176 (2015)
S. C. Malpas, A. Hu, and D. Budgett. Inductively powered mobile sensor system. Ed: Google Patents (2015)
Wu, H.H., Boys, J.T., Covic, G.A.: An AC processing pickup for IPT systems. IEEE T. Power Electr. Magazine. 25(5), 1275–1284 (2010)
Mai, R., Chen, Y., Zhang, Y., Yang, N., Cao, G., He, Z.: Optimization of the passive components for an S-LCC topology-based WPT system for charging massive electric bicycles. IEEE T. Ind. Electron. Magazine. 93(7), 5497–5508 (2018)
M. Q. Nguyen, S. Dubey, S. Rao, and C. Chiao. Wireless power transfer via air and building materials using multiple repeaters. Wireless and Microwave Circuits and Systems 2014 Texas Symposium on. 1–4 (2014).
Salas, M., Focke, O., Herrmann, A.S., Lang, W.: Wireless power transmission for structural health monitoring of fiber-reinforced-composite materials. IEEE Sens. J. 14(7), 2171–2176 (2014)
R. Hua, A. P. Hu, and Y. Su. Three-stages magnetic field repeater for extending the range of inductive power transfer. Transactions of China Electrotechnical Society, 133–137 (2015)
Yi, Y., Buttner, U., Fan, Y., Foulds, I.G.: Design and optimization of a 3-coil resonance-based wireless power transfer system for biomedical implants. Int. J. Circ. Theor. App. 43(10), 1379–1390 (2015)
Qian, L., Qian, K., Shi, Y., Xia, H., Wang, J., Xia, Y.: TSV based orthogonal coils with high misalignment tolerance for inductive power transfer in biomedical implants. IEEE T Circ.-II 68(6), 1832–1836 (2021)
Barsari, V.Z., Thrimawithana, D.J., Covic, G.A.: An inductive coupler array for in-motion wireless charging of electric vehicles. IEEE T. Power Electr. 36(9), 9854–9863 (2021)
Hossain, A., Darvish, P., Mekhilef, S., Tey, K.S., Tong, C.W.: A new coil structure of dual transmitters and dual receivers with integrated decoupling coils for increasing power transfer and misalignment tolerance of wireless EV charging system. IEEE T. Ind. Electron 69(8), 7869–7878 (2022)
Darvish, P., Mekhilef, S., Illias, H.A.B.: A novel S-S–LCLCC compensation for three-coil WPT to improve misalignment and energy efficiency stiffness of wireless charging system. IEEE T. Power Electr. 36(2), 1341–1355 (2021)
Si, P., Hu, A.P., Malpas, S., Budgett, D.: A frequency control method for regulating wireless power to implantable devices. IEEE T. Biomed. Circ. S. 2(1), 22–29 (2008)
Zaheer, A., Hao, H., Covic, G.A., Kacprzak, D.: Investigation of multiple decoupled coil primary pad topologies in lumped IPT systems for interoperable electric vehicle charging. IEEE T. Power Electr. 30(4), 1937–1955 (2015)
Tejeda, A., Carretero, C., Boys, J.T., Covic, G.A.: Ferrite-less circular pad with controlled flux cancelation for EV wireless charging. IEEE Trans. Power Electron. 32(11), 8349–8359 (2017)
Dai, X., Li, X., Li, Y., Hu, A.P.: Impedance-matching range extension method for maximum power transfer tracking in IPT system. IEEE T. Power Electr. 33(5), 4419–4428 (2018)
Dai, X., Li, X., Li, Y., Hu, A.P.: Maximum efficiency tracking for wireless power transfer systems with dynamic coupling coefficient estimation. IEEE T. Power Electr. 33(6), 5005–5015 (2018)
Chen, Y., Mai, R., Zhang, Y., Li, M., He, Z.: Improving misalignment tolerance for IPT system using a third-coil. IEEE T. Power Electr. 34(4), 3009–3013 (2019)
Jayathurathnage, P.K.S., Alphones, A., Vilathgamuwa, D.M.: Optimization of a wireless power transfer system with a repeater against load variations. IEEE Trans. Ind. Electron 64(10), 7800–7809 (2017)
Raju, S., Wu, R., Chan, M., Yue, C.P.: Modeling of mutual coupling between planar inductors in wireless power applications. IEEE T. Power Electr. 29(1), 481–490 (2014)
Azari, A., Hamzeh, S., Naderi, S.: Multi-objective optimization of the reservoir system operation by using the hedging policy. Water Resour. Manage 32, 2061–2078 (2018)
Measurement methods for electromagnetic fields of household appliances and similar apparatus with regard to human exposure, IEC 62233 (2005).
Acknowledgements
This work was supported in part by the National Natural Science Foundation of China (5210071288); the National Key Research and Development Program of China (2019YFE0118000); the Guangxi Key Research and Development Program of China (2021AA11008); the Guangxi Science and Technology Base and Talent Special Project of China (2021AC19120) and Open Research Project Programme of the State Key Laboratory of Internet of Things for Smart City (SKL-IoTSC(UM)-2021-2023/ORP/GA07/2022). The Cross disciplinary research project of civil engineering of Guangxi University.
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Zhang, D., Li, X., Yang, J. et al. Asymmetric coaxial three-coil wireless power transmission system optimization. J. Power Electron. 23, 1436–1446 (2023). https://doi.org/10.1007/s43236-023-00624-0
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DOI: https://doi.org/10.1007/s43236-023-00624-0