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Old Mar 13, 2009, 11:24 AM
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Bedford, MA
Joined Nov 2000
324 Posts
Since the motor has many alternating poles around the rotor, a single axial cut in the copper tube will only yield a small improvement in losses. Lamination in the direction Ron suggests would be electrically better, but not practical to make. As others have suggested, contain the flux with a thicker flux ring and/or use a non-conductive material for your mount.

-Tracy
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