Wireless Power Transmission with Electromagnetic Inductive Coupling

Award Information
Agency:
Department of Defense
Branch
Defense Advanced Research Projects Agency
Amount:
$98,913.00
Award Year:
2007
Program:
SBIR
Phase:
Phase I
Contract:
W31P4Q-08-C-0032
Award Id:
81302
Agency Tracking Number:
07SB2-0523
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
605 Mercury Street, Raleigh, NC, 27603
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
148040447
Principal Investigator:
Stephen Norton
research physicist
(919) 839-8515
norton@geophex.com
Business Contact:
Lynda Redner
administrator
(919) 839-8515
redner@geophex.com
Research Institution:
n/a
Abstract
This project addresses the problem of the wireless transfer of power between a source and nearby mobile platform such as a robotic vehicle. The primary objective of this research will be to design and evaluate, by analysis and computer modeling, an inductively-coupled system consisting of an optimally-designed configuration of transmitting coils to maximize the coupling efficiency though a target receiving coil. In particular, the concept of "inductive focusing" or "flux focusing" will be explored. Briefly, this is the idea of controlling the currents in a set of concentric transmitting coils to "concentrate" the magnetic flux through a receiver coil. That is, the transmitter is designed to maximize the flux linkage through the receiving coil while minimizing the flux elsewhere. This can be done by selecting the currents in the coils to reinforce the field linking the receiving coil while simultaneously canceling the fields outside of this coil. This can be formulated as a constrained optimization problem. The advantage of this approach is that minimal power is wasted due to the induction of currents in conducting material outside the target coil.

* information listed above is at the time of submission.

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