Exciting Voltage Control for Efficiency Maximization for 2-D Omni-Directional Wireless Power Transfer Systems
The majority of wireless power transfer (WPT) systems transfer power in a directional manner. This paper describes a discrete exciting voltage control technique for WPT via magnetic resonant coupling with two orthogonal transmitter coils (2D omni-directional WPT system) which can maximize the power transfer efficiency in response to the change of coupling status. The theory allows the equations of the efficiency of the system to be determined at all the rate of the mutual inductance. The calculated results are included to confirm the advantage to one directional WPT system and the validity of the theory and the equations.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1130641Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 522
 A. Kurs, A. Karalis, R. Moffat, J. D. Jonnopoulos and M. Soljačić, “Wireless Power Transfer via Strongly Coupled Magnetic Resonances”, in Science Express, Vol.317, No.5834, pp.83-86 (2007).
 A. Karalis, J. D. Jonnopoulos and M. Soljačić, “Efficient wiewless non-radiative mid-range energy transfer”, Annals of Physics, Vol.323, No.1, pp.34-48 (2008).
 Q. Chen, L. Li, and K. Sawaya, “Numerical Analysis on Transmision Efficiency of Evanescent Resonant Coupling Wireless Power Transfer System”, IEEE Trans. Antennas Propag., Vol.58, No.5, pp.1751-1758 (2010).
 T. Koyama, K. Umetani and E. Hiraki, “Optimaization of the output power in a magnetic coupling wireless power transfer systems with dural resonators ”, The papers of Technical Meeting on “Electron Devices” and “Semiconductor Power Converter”, IEE Japan, pp.79-84(2015) (in Japanese).
 D. Lin, C. Zhang and S. Y. R. Hui, “Power and efficiency of 2-D omni-directional wireless power transfer systems”, Energy Conversion Congress and Exposition (ECCE), 2015 IEEE, pp.4951-4958 (2015).
 D. Lin, S. Y. R. Hui and C. Zhang, “Omni-directional wireless power transfer systems using discrete magnetic field vector control”, Energy Conversion Congress and Exposition (ECCE), 2015 IEEE, pp.3203-3208 (2015).
 N. Ha-Van and C. Seo, “A novel cubic transmitter for multi-directional wireless power transfer”, Wireless Power Transfer Conference (WPTC), 2015 IEEE, pp.1 - 3 (2015).
 M. Kato, T. Imura, and Y. Hori, “New Characteristics Analysis Considering Taransmission Distance and Load Variation in Wireless Power Transfer via Magnetic Resonant Coupling ”, Proc. INTELEC2012, pp.1-5 (2012).