Rotor with reduced windage losses

Details Rotor with reduced windage losses Rotor with reduced windage losses

H - Electricity

02

K

H02K 21/20 (2006.01) H02K 19/20 (2006.01) H02K 21/36 (2006.01)

Patent

CA 2044278

2044278 9103859 PCTABS00003 A homopolar, transverse pole rotor (14) having a central cylindrical body (24) with a set of circumferentially spaced, axially extending salient poles (28) at each end thereof, is constructed to reduce windage losses. Integral shrouds (29, 31) are placed on either side of each set of salient poles and a relief is machined into the outer surface of each shroud to form an accentuated pole tip (64) which ensures magnetic centering of the rotor. To further minimize windage losses the diameter of the central cylindrical body (24) can be reduced and non-magnetic material can be secured within interpole recesses. Mechanical fasteners (66), dove tails (72) or tensioned circumferential banding (82) can be used to secure the non-magnetic interpole pieces to the rotor.

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