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Room Temperature Characterization of a Magnetic Bearing for TurbomachineryOpen loop, experimental force and power measurements of a three-axis, radial, heteropolar magnetic bearing at room temperature for rotor speeds up to 20,000 RPM are presented in this paper. The bearing, NASA Glenn Research Center's and Texas A&M's third generation high temperature magnetic bearing, was designed to operate in a 1000 F (540 C) environment and was primarily optimized for maximum load capacity. The experimentally measured force produced by one C-core of this bearing was 630 lb. (2.8 kN) at 16 A, while a load of 650 lbs (2.89 kN) was predicted at 16 A using 1D circuit analysis. The maximum predicted radial load for one of the three axes is 1,440 lbs (6.41 kN) at room temperature. The maximum measured load of an axis was 1050 lbs. (4.73 kN). Results of test under rotating conditions showed that rotor speed has a negligible effect on the bearing's load capacity. A single C-core required approximately 70 W of power to generate 300 lb (1.34 kN) of magnetic force. The room temperature data presented was measured after three thermal cycles up to 1000 F (540 C), totaling six hours at elevated temperatures.
Document ID
20020090900
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Montague, Gerald (Army Research Lab. Cleveland, OH United States)
Jansen, Mark (Sest, Inc. Brook Park, OH United States)
Provenza, Andrew (NASA Glenn Research Center Cleveland, OH United States)
Jansen, Ralph (Toledo Univ. OH United States)
Ebihara, Ben (Toledo Univ. OH United States)
Palazzolo, Alan (Texas A&M Univ. College Station, TX United States)
Date Acquired
September 7, 2013
Publication Date
October 1, 2002
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
ARL-TR-2858
NASA/TM-2002-211904
NAS 1.15:211904
E-13594
Report Number: ARL-TR-2858
Report Number: NASA/TM-2002-211904
Report Number: NAS 1.15:211904
Report Number: E-13594
Funding Number(s)
PROJECT: DA Proj. 1L1-61102-AF-20
PROJECT: RTOP 708-28-13
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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