Electrical excitation of the local earth for resonant, wireless energy transfer
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Department of Chemical and Materials Engineering, University of Alberta, Edmonton AB T6G 2V4, Canada. Phone: +1 (780) 492-9548
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Department of Physics, University of Alberta, Edmonton AB T6G 2J1, Canada
More Information
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Author Bio:
Charles W. Van Neste is a Research Associate working in the Chemical and Materials Engineering Department at the University of Alberta. He obtained his Ph.D. in Electrical Engineering from Tennessee Technological University in 2009. Dr. Van Neste's primary research involves alternative forms of energy generation and transmission. His areas of expertise include wireless and quasi-wireless power transfer, electronics and instrumentation, and electric machine design.
Richard Hull is a Research Scientist working in the Chemical and Materials Engineering Department at the University of Alberta. He graduated from Oxford University in 2009 with a degree in Nanotechnology. His initial career was in the aerospace industry as an Electronics R & D Engineer on defense projects dealing with military radar systems in the United Kingdom. He later worked for the Canadian Space Agency at SPAR Aerospace in Toronto. His area of expertise includes power electronics, data processing, telecommunications, and robotics.
John E. Hawk received his Bachelors of Science in Physics and Mathematics at the University of Memphis in 2000. While continuing graduate studies in Applied Physics at the University of Tennessee, Knoxville, he began working as a Research Associate at the Oak Ridge National Laboratory. He is currently pursuing a Doctorate in the Chemical and Materials Engineering Dept. at the University of Alberta (CERC Graduate Fellow). His areas of interest are mechanical and electrical resonant structures, Atomic Force Microscopy, software development, and theoretical analysis.
Arindam Phani is a CERC Graduate Research Fellow (Ph.D.) at University of Alberta in the Department of Chemicals and Materials Engineering. His interests lie in fundamental understanding of physics of resonant systems. He is currently studying the role of dissipation in macro, micro, and nano-scale electrical and mechanical resonant systems and developing sensors thereof. His other areas of interest include optical, opto-electro-mechanical transduction; sensors; and measurement devices.
Martyn J. Unsworth is a Professor of Geophysics at the University of Alberta. He received his Ph.D. from Cambridge University in 1991 in marine geophysics and has worked since then in electromagnetic geophysics. His research is currently focused on magnetotelluric exploration, with applications in volcanology, tectonics, mineral exploration and geothermal energy development.
Thomas Thundat is a Canada Excellence Research Chair professor at the University of Alberta. He received his Ph.D. in physics from the State University of New York at Albany in 1987. Dr. Thundat is the author of over 380 publications in refereed journals, 45 book chapters, 40 patents, and over 130 invited talks. His research is currently focused on novel physics and sensing applications
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Corresponding author:
C.W. Van Neste Email: cvannest@ualberta.ca
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Abstract
Here we demonstrate wireless energy transfer that exploits the conductivity and permittivity of soil to create a potential gradient on the surface around an earthed electrode, distributing electrical energy over the area. This generated surface potential can be amplified using a special standing-wave receiver for harnessing the distributed energy. We have experimentally mapped the surface potential around the electrode and plotted the received energy covering an area of 1200 m2. Key operating parameters are determined with a discussion on optimizing the system efficiency. This technique could address the challenge of distributing electrical energy to many low power devices over large outdoor areas without the use of wires.
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Cite this article
Van Neste CW, Hull R, Hawk JE, Phani A, Unsworth MJ, et al. 2016. Electrical excitation of the local earth for resonant, wireless energy transfer. Wireless Power Transfer 3(2): 117-125 doi: 10.1017/wpt.2016.8
Van Neste CW, Hull R, Hawk JE, Phani A, Unsworth MJ, et al. 2016. Electrical excitation of the local earth for resonant, wireless energy transfer. Wireless Power Transfer 3(2): 117-125 doi: 10.1017/wpt.2016.8
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