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Title: Apparatus and method for magnetically unloading a rotor bearing

An apparatus and method for unloading a rotor bearing is described. The apparatus includes an electromagnet for levitating the rotor. In one embodiment, a sensor of the magnetic field near the electromagnet is used to control the current to levitate the rotor. In another embodiment, a method is provided that includes rotating the rotor, increasing the current to levitate the rotor and decrease the gap between electromagnet and rotor, and then reducing the current to levitate the rotor with a minimal amount of electric power to the electromagnet.
Inventors:
Issue Date:
OSTI Identifier:
1420774
Assignee:
Amber Kinetics, Inc. (Union City, CA) NETL
Patent Number(s):
9,892,839
Application Number:
13/973,937
Contract Number:
FOA-0000036
Resource Relation:
Patent File Date: 2013 Aug 22
Research Org:
Amber Kinetics, Inc., Union City, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

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