Advanced SearchSearch Tips
Characteristics of Wireless Power Transmission Using Superconductor Coil to Improve the Efficiency According to the Shielding Materials
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Characteristics of Wireless Power Transmission Using Superconductor Coil to Improve the Efficiency According to the Shielding Materials
Lee, Yu-Kyeong; Jeong, In-Sung; Hwang, Jun-Won; Choi, Hyo-Sang;
  PDF(new window)
The magnetic resonance method requires high quality factor(Q-factor) of resonators. Superconductor coils were used in this study to increase the Q-factor of wireless power transfer(WPT) systems in the magnetic resonance method. The results showed better transfer efficiency compared to copper coils. However, as superconducting coils should be cooled below critical temperatures, they require cooling containers. In this viewpoint, shielding materials for the cooling containers were applied for the analysis of the WPT characteristics. The shielding materials were applied at both ends of the transmitter and receiver coils. Iron, aluminum, and plastic were used for shielding. The electric field distribution and S-parameters (S11, S21) of superconducting coils were compared and analyzed according to the shield materials. As a result, plastic shielding showed better transfer efficiency, while iron and aluminum had less efficiency. Also, the maximum magnetic field distribution of the coils according to the shielding materials was analyzed. It was found that plastic shielding had 5 times bigger power transfer rate than iron or aluminum. It is suggested that the reliability of superconducting WPT systems can be secured if plastic is used for the cooling containers of superconducting resonance coils.
Superconductor coil;Wireless power transfer(WPT);Shielding materials;
 Cited by
Andre Kurs, Aristeidis Karalis, J. D. Joannopoulos, and Marin Soljacic, "Wireless power transfer via strongly coupled magnetic resonances", Science, vol. 317, no.5834, pp. 83-86, 2007. crossref(new window)

J. D Jannopoulos, A Karalis, and M. Soljacic, " Wireless non-radiative energy tasnfer", US patent No. US 7, 741734 B2, Jun, 22, 2010.

In-Sung Jeong, Hyo-Sang Choi, "Characteristics of Wireless Power Transmission applying the superconducting coil", KIEE, vol.62, no.6, pp. 762-766, 2013.

Aristeidis Karalis, J. D Joannopoulos, Marin Soljacic, "Efficient wirelss non-radiative mid-range energy transfer", Annals of Physics, vol.323, pp. 34-48, 2008. crossref(new window)

Mi-Kyung Song, Seung-min Hong, Jong-myeong Park, "Coatings material for shielding of electromagnetic wave", Polymer science and technology, vol.12, no.5, pp. 689-697, 2001.

Y. Yorozu, M. Hirano, K. Oka, and Y. Tagawa, "Electron spectroscopy studies on magneto-optical media and plastic substrate interface", IEEE Transl. J. Magn. Japan, Vol. 2, pp. 740-741, 1987. crossref(new window)

Seok Bae, Don-Chul Choi, Soon-Young Hyun, Sang Won Lee, "Electromagnetic wave shielding Materials for the wireless power transfer module in mobile handset", KMS, vol.23, no.2, pp. 68-76, 2013.

S. A. Schelkunoff, Electromagnetic Wave, pp. 303-315, Van Nostrand, New York, 1943.

SAE ARP 1173, "Test procedure to measure the RF shielding characteristics of EMI gaskets", Society of Automotive Engineers, Aerospace Recommended Practice," July 1975.