Abstract
The coupling coefficient between the transmitters and receivers is a key factor of power transfer efficiency for magnetic resonant coupling wireless power transfer system. Firstly, the equivalent circuit model of double-transmitter (DT) structure is established. The correlation between the transmission power and coupling coefficient of both single-transmitter (ST) and DT structure is compared and analyzed. The result shows that the critical coupling coefficient of DT structure is reduced to 0.707 times of the ST structure, when there are peak transfer power. And it means that the former can increase the transmission distance. In this paper, the effective transmission area is defined, and the effective transmission areas of DT structure can be obtained in two cases of symmetric and asymmetric structures, respectively. Finally the numerical simulation analysis is conducted and a conclusion is drawn that the effective transmission area in over-coupling area can be significantly enlarged with frequency tracking measures, which validates the correctness of the aforesaid theoretical analysis.
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Acknowledgments
The work leading to this paper was supported by the National Natural Science Foundation of China (Project No. 51607110) and Natural Science Foundation of Shanghai (Project No. 14ZR1417600).
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Xia, N., Tian, M., Lian, H., Zhu, Y. (2017). Analysis of Effective Transmission Distance of Double Transmitters in Magnetic Coupled Resonant WPT System. In: Yue, D., Peng, C., Du, D., Zhang, T., Zheng, M., Han, Q. (eds) Intelligent Computing, Networked Control, and Their Engineering Applications. ICSEE LSMS 2017 2017. Communications in Computer and Information Science, vol 762. Springer, Singapore. https://doi.org/10.1007/978-981-10-6373-2_68
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DOI: https://doi.org/10.1007/978-981-10-6373-2_68
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