Permanent magnet rotor for a direct drive generator or a low speed motor
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United States of America Patent
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Apr 8, 2008
Grant Date -
Feb 9, 2006
app pub date -
Jul 28, 2005
filing date -
Aug 6, 2004
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In order to provide a less expensive generator, a rotor using nonmagnetic beams is disclosed. The rotor includes a magnetic steel rim connected to a main generator shaft by a hub. The magnetic rim supports the components of the rotor, which includes a plurality of magnets and pole pieces. The pole pieces are connected to the rim with non-magnetic standoffs and nonmagnetic fasteners. The magnets are supported radially by nonmagnetic beams. The magnets are retained tangentially by pole pieces and radially by wedges. The components of the rotor are further retained axially between plates coupled to the rim and a shoulder on the pole pieces.
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