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Title: Combined passive bearing element/generator motor

Abstract

An electric machine includes a cylindrical rotor made up of an array of permanent magnets that provide a N-pole magnetic field of even order (where N=4, 6, 8, etc.). This array of permanent magnets has bars of identical permanent magnets made of dipole elements where the bars are assembled in a circle. A stator inserted down the axis of the dipole field is made of two sets of windings that are electrically orthogonal to each other, where one set of windings provides stabilization of the stator and the other set of windings couples to the array of permanent magnets and acts as the windings of a generator/motor. The rotor and the stator are horizontally disposed, and the rotor is on the outside of said stator. The electric machine may also include two rings of ferromagnetic material. One of these rings would be located at each end of the rotor. Two levitator pole assemblies are attached to a support member that is external to the electric machine. These levitator pole assemblies interact attractively with the rings of ferromagnetic material to produce a levitating force upon the rotor.

Inventors:
 [1]
  1. (Walnut Creek, CA)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
873205
Patent Number(s):
US 6111332
Assignee:
Regents of University of California (Oakland, CA) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
combined; passive; bearing; element; generator; motor; electric; machine; cylindrical; rotor; array; permanent; magnets; provide; n-pole; magnetic; field; etc; bars; identical; dipole; elements; assembled; circle; stator; inserted; axis; sets; windings; electrically; orthogonal; set; provides; stabilization; couples; horizontally; disposed; outside; rings; ferromagnetic; material; located; levitator; pole; assemblies; attached; support; external; interact; attractively; produce; levitating; force; bearing element; electric machine; permanent magnet; magnetic field; permanent magnets; magnetic material; horizontally disposed; ferromagnetic material; passive bearing; combined passive; cylindrical rotor; dipole field; /310/

Citation Formats

Post, Richard F. Combined passive bearing element/generator motor. United States: N. p., 2000. Web.
Post, Richard F. Combined passive bearing element/generator motor. United States.
Post, Richard F. Sat . "Combined passive bearing element/generator motor". United States. https://www.osti.gov/servlets/purl/873205.
@article{osti_873205,
title = {Combined passive bearing element/generator motor},
author = {Post, Richard F.},
abstractNote = {An electric machine includes a cylindrical rotor made up of an array of permanent magnets that provide a N-pole magnetic field of even order (where N=4, 6, 8, etc.). This array of permanent magnets has bars of identical permanent magnets made of dipole elements where the bars are assembled in a circle. A stator inserted down the axis of the dipole field is made of two sets of windings that are electrically orthogonal to each other, where one set of windings provides stabilization of the stator and the other set of windings couples to the array of permanent magnets and acts as the windings of a generator/motor. The rotor and the stator are horizontally disposed, and the rotor is on the outside of said stator. The electric machine may also include two rings of ferromagnetic material. One of these rings would be located at each end of the rotor. Two levitator pole assemblies are attached to a support member that is external to the electric machine. These levitator pole assemblies interact attractively with the rings of ferromagnetic material to produce a levitating force upon the rotor.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}

Patent:

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