NDLI: Experimental high temperature characterization of a magnetic bearing for turbomachinery

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Experimental high temperature characterization of a magnetic bearing for turbomachinery

Content Provider	NASA Technical Reports Server (NTRS)
Author	Ebihara, Ben Jansen, Mark Provenza, Andrew Palazzolo, Alan Montague, Gerald Jansen, Ralph
Copyright Year	2003
Description	Open loop, experimental force and power measurements of a radial, redundant-axis, magnetic bearing at temperatures to 1000 F (538 C) and rotor speeds to 15,000 RPM along with theoretical temperature and force models are presented in this paper. The experimentally measured force produced by a single C-core using 22A was 600 lb. (2.67 kN) at room temperature and 380 lb. (1.69 kN) at 1000 F (538 C). These values were compared with force predictions based on a 1D magnetic circuit analysis and a thermal analysis of gap growth as a function of temperature. Tests under rotating conditions showed that rotor speed has a negligible effect on the bearing s load capacity. One C-core required approximately 340 W of power to generate 190 lb. (8.45 kN) of magnetic force at 1000 F (538 C); however the magnetic air gap was much larger than at room temperature. The data presented is after the bearing had already operated six thermal cycles and eleven total (not consecutive) hours at 1000 F (538 C).
File Size	4243662
Page Count	17
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20030039177
Archival Resource Key	ark:/13960/t0sr3tt5r
Language	English
Publisher Date	2003-03-01
Access Restriction	Open
Subject Keyword	Aircraft Propulsion And Power Magnetic Cores Network Analysis Power Factor Controllers High Temperature Tests Turbomachinery Rotor Speed Mathematical Models Magnetic Bearings Thermal Analysis Magnetic Circuits Aerodynamic Loads Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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