Magnetic Gears for Utility Actuation Gearbox Applications

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-10-C-0544
Agency Tracking Number: N102-115-1128
Amount: $79,441.00
Phase: Phase I
Program: SBIR
Awards Year: 2010
Solitcitation Year: 2010
Solitcitation Topic Code: N102-115
Solitcitation Number: 2010.2
Small Business Information
Davey Enterprises, Inc.
1844 Old Mission Rd, Edgewater, FL, 32132
Duns: 962948266
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Kent Davey
 President
 (386) 478-7125
 kdavey@ieee.org
Business Contact
 Kent Davey
Title: President
Phone: (386) 478-7125
Email: kdavey@ieee.org
Research Institution
N/A
Abstract
Although published magnetic gear designs have been demonstrated in various and sundry academic settings, none are viable for industrial scale / military applications. Yet the technology remains enticing. The favored solution involves a topology that capitalizes on a cycloidal operation, but with axial flux that allows the objectionable forces to be canceled. This favored topology operates with a single air gap between torque generating MMF sources and allows for a pseudo drive topology using a transverse (i.e., radial) flux operating in the strong normal direction. Note that the novel solution proposed has never appeared in literature and is proprietary to this team. This team has designed and constructed 3 versions of the planetary gear, the topology that has received the greatest attention in the literature. Two weaknesses are inherent to the operating principle. (1) It employs two air gaps, and (2) the central structure must be laminated and sustain torques equal to the sum of those on the high and low speed shafts. This team has just completed the construction of its 2nd generation axial flux cycloid gear. This topology can realize much higher torque ratios without cogging, and can be made to balance the primary forces the bearings.

* information listed above is at the time of submission.

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