MAGNETIC BEARINGS FOR MINIATURE HIGH SPEED TURBOMACHINES

Award Information
Agency:
National Aeronautics and Space Administration
Branch:
N/A
Amount:
$499,342.00
Award Year:
1991
Program:
SBIR
Phase:
Phase II
Contract:
N/A
Agency Tracking Number:
11950
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Creare, Inc.
P.o. Box 71, Hanover, NH, 03755
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
072021041
Principal Investigator
 Jayathi Y. Murthy
 Principal Engineer
 (603) 643-3800
Business Contact
 JAMES A. BLOCK
Title: PRESIDENT
Phone: (603) 643-3800
Research Institution
N/A
Abstract
THIS PROGRAM IS AIMED AT THE DEVELOPMENT OF A NOVEL ELECTROMAGNETIC (E-M) BEARING SYSTEM SPECIFICALLY FOR MINIATURE HIGH-SPEED TURBOMACHINES USED IN SPACEBORNE TURBO-BRAYTON CRYOCOOLERS. COMPARED WITH GAS BEARINGS CURRENTLY IN USE, THE E-M BEARINGS PROVIDE GREATER RUGGEDNESS AND WILL ALLOW FOR OPERATION AT LOWER TEMPERATURES AND IN VACUUM ENVIRONMENTS. THESE ATTRIBUTES OFFER THE POTENTIAL FOR MAJOR IMPROVEMENTS IN CRYOCOOLER EFFICIENCY AND RELIABILITY, PARTICULARLY AT THE TEMPERATURESAND REFRIGERATION CAPACITIES ASSOCIATED WITH SURVEILLANCE SENSORS. IN THE PROPOSED PROGRAM, THE TECHNOLOGY OF ACTIVE E-M BEARINGS, WHICH IS RELATIVELY WELL DEVELOPED FOR LARGE SHAFTSIZES, WILL BE EXTENDED TO MINIATURE TURBOMACHINES. THE KEYCHALLENGE IN MINIATURIZING E-M BEARINGS IS THE DEVELOPMENT OF MINIATURE SHAFT POSITION SENSORS THAT ARE NEEDED TO CONTROL THE BEARING FORCE. IN PHASE I, AN E-M BEARING USING A NOVEL CAPACITIVE SENSOR WILL BE DEMONSTRATED. THE DETAILED DESIGN, DEVELOPMENT AND DEMONSTRATION OF A COMPLETEMINIATURE E-M BEARING SYSTEM IN A PROTOTYPE TURBOMACHINE IS PLANNED FOR PHASE II.

* information listed above is at the time of submission.

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