NONMAGNETIC MAGNET RETENTION CHANNEL ARRANGEMENT FOR HIGH SPEED ROTORS
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United States of America Patent
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-
Apr 15, 2003
Grant Date -
May 1, 2003
app pub date -
Mar 19, 2002
filing date -
Oct 31, 2001
priority date (Note) -
Granted
status (Latency Note)
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Abstract
In the magnet retention channel arrangement for a high speed rotor described in the specification, a rotor has an array of radially projecting, angularly spaced pole pieces and a magnet retention channel member inserted between each adjacent pair of pole pieces. Each magnet retention channel member is made of nonmagnetic material and has opposed side walls and an integral end wall at one end of the side walls and integral dovetail feet at the opposite ends of side walls. The channels contain permanent magnets and the side walls of uniform thickness with nonmagnetic feet within the core member couple the magnetic flux from the magnets to the pole pieces with substantially no magnetic discontinuities while the presence of the nonmagnetic end wall avoids magnetic shorting.
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