SUPERCONDUCTING MAGNETIC BEARINGS FOR HIGH PERFORMANCE MOMENTUM-EXCHANGE EFFECTOR

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: N/A
Agency Tracking Number: 6355
Amount: $500,000.00
Phase: Phase II
Program: SBIR
Awards Year: 1989
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
71 Rogers St, Cambridge, MA, 02142
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 James R Downer
 (617) 661-8942
Business Contact
Phone: () -
Research Institution
N/A
Abstract
PRECISION POINTING OF LARGE PAYLOADS REQUIRES TORQUES AND ANGULAR MOMENTUM STORAGE CAPACITIES THAT ARE LARGE IN COMPARISON TO THE CAPABILITIES OF AVAILABLE HARDWARE. IN ADDITION, THE POINTING ACTUATOR MUST HAVE EXTREMELY LOW TORQUE JITTER. HIGH TORQUE AND LOW NOISE COMBINE TO PRODUCE AN EXTREMELY DIFFICULT DESIGN CONSTRAINT FOR MECHANICAL BEARINGS SINCE ROLLING ELEMENTS TRANSMIT VIBRATIONS DIRECTLY TO THE SUPPORTING STRUCTION. THE USE OF MAGNETIC BEARINGS INANGULAR MOMENTUM EXCHANGE EFFECTORS HAS THE PRIMARY ADVANTAGE THAT PHYSICAL CONTACT BETWEEN THE ROTOR AND STATOR IS ELIMINATED. FOR CONVENTIONAL MAGNETIC BEARINGS, HIGH TORQUES MAY REQUIRE THAT THE MAGNETIC STRUCTURE BE EXCESSIVELY MASSIVE. AN ALTERNATIVE DESIGN EMPLOYS A SUPERCONDUCTING COIL AND ELIMINATES ALL CONVENTIONAL MAGNETIC STRUCTURES. THE BASELINE APPROACH IS TO REPLACE THE PERMANENT MAGNET AND MAGNETIC STRUCTURE OF A CONVENTIONAL MAGNETIC BEARING WITH THE SUPERCONDUCTING COIL. IN THE SUPERCONDUCTING MAGNETIC BEARING, A SINGLE COIL REPLACES TWO PERMANENT MAGNET STRUCTURES IN ORDER TO PRODUCE AN ENERGY-EFFICIENT, LIGHT-WEIGHT DESIGN. A DESIGN DEFINITION AND DETAILED ANALYSIS OF A SUPERCONDUCTING BEARING SYSTEM IS BEING DEVELOPED. FROM THESE RESULTSA LABORATORY PROTOTYPE COULD BE CONSTRUCTED AND TESTED IN A LATER PHASE.

* Information listed above is at the time of submission. *

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