Combined passive bearing element/generator motor

Patent · Sat Jan 01 00:00:00 EST 2000

OSTI ID:873205

Post, Richard F ^[1]

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1. Walnut Creek, CA

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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: Regents of University of California (Oakland, CA)
• Patent Number(s): US 6111332
• OSTI ID: 873205
• Country of Publication: United States
• Language: English

Related Subjects

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
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