Wireless Power Feeding with Strongly Coupled Magnetic Resonance for a Flying Object
- 1 Department of Advanced Energy, The University of Tokyo, Tokyo, Japan
- 2 Department of Advanced Energy, The University of Tokyo, Tokyo, Japan
- 3 Department of Advanced Energy, The University of Tokyo, Tokyo, Japan
- 4 Department of Aeronautics and Astronautics, The University of Tokyo, Tokyo, Japan
Abstract
Wireless power feeding was examined with strongly coupled magnetic resonance for an object moving in 3-D space. Electric power was transmitted from the ground to an electrically powered toy helicopter in the air. A lightweight receiver resonator was developed using copper foil. High Q of greater than 200 was obtained. One-side impedance matching the transmitter side was proposed to cope with high transmission efficiency and the receiver’s weight reduction. Results show that the efficiency drop near the ground was drastically improved. Moreover, the measured efficiency showed good agreement with theoretical predictions. A fully equipped helicopter of 6.56 g weight was lifted up with source power of about 5 W to an altitude of approximately 10 cm.
- A. Kurs, A. Karalis, R. Moffatt, J. D. Joannopoulos, P. Fisher and M. Solja?i?, “Wireless Power Transfer via Strongly Coupled Magnetic Resonances,” Science Magazine, Vol. 317, No. 5834, 2007, pp. 83-86.
- A. Karalis, J. D. Joannopoulos and M. Solja?i?, “Efficient Wireless Non-Radiative Mid-Range Energy Transfer,” Annals of Physics, Vol. 323, No. 1, 2008, pp. 34-48. doi:10.1016/j.aop.2007.04.017
- W. Fu, B. Zhang, D. Qiu and W. Wang, “Analysis of Transmission Mechanism and Efficiency of Resonance Coupling Wireless Energy Transfer System,” Proceedings of the International Conference on Electrical Machines and Systems, Wuhan, 17-20 October 2008, pp. 2163-2168.
- T. Komaru, M. Koizumi, K. Komurasaki, T. Shibata and K. Kano, “Compact and Tunable Transmitter and Receiver for Magnetic Resonance Power Transmission to Mobile Objects,” In: K. Y. Kim, Ed., Wireless Energy Transfer Based on Electromagnetic Resonance: Principles and Engineering Explorations, In Tech, Rijeka, 2011, pp. 133-150.
- T. Komaru, K. Komurasaki, M. Koizumi, T. Shibata and K. Kano, “Parametric Evaluation of Mid-range Wireless Power Transmission,” Proceedings of International Conference on Industrial Technologies, Vi a del Mar, 17 March 2010, pp. 789-792.