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Wireless Power Transmission with Electromagnetic Inductive Coupling

Award Information

Agency:
Department of Defense
Branch:
Defense Advanced Research Projects Agency
Award ID:
81302
Program Year/Program:
2007 / SBIR
Agency Tracking Number:
07SB2-0523
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
GEOPHEX LTD.
605 Mercury Street Raleigh, NC -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2007
Title: Wireless Power Transmission with Electromagnetic Inductive Coupling
Agency / Branch: DOD / DARPA
Contract: W31P4Q-08-C-0032
Award Amount: $98,913.00
 

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.

Principal Investigator:

Stephen Norton
research physicist
9198398515
norton@geophex.com

Business Contact:

Lynda Redner
administrator
9198398515
redner@geophex.com
Small Business Information at Submission:

GEOPHEX LTD.
605 Mercury Street Raleigh, NC 27603

EIN/Tax ID: 561378871
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No