H - Electricity – 02 – K
Patent
H - Electricity
02
K
H02K 1/08 (2006.01) H02K 17/02 (2006.01) H02K 19/10 (2006.01) H02K 29/03 (2006.01) H02K 1/14 (2006.01)
Patent
CA 2192297
A variable reluctance electric motor includes a hollow cylindrical stator having a plurality of radially inwardly extending poles. Each of the stator poles is generally rectangular in cross sectional shape and is bifurcated into two stator teeth at its radially innermost end by a central, longitudinally extending slot.The outer circumferential edges of the stator pole teeth are beveled at their respective junctions with the sides of the stator pole. A stator pole gap width is defined between adjacent stator poles. A slot width is defined within each of the stator poles between the adjacent longitudinally extending edges of the slot. The ratio of the stator pole gap width to the stator pole slot width is in the range of from about 1.8 to about 2.3. A cylindrical rotor is co-axially supported within the stator for relative rotational movement. The rotor has a plurality of radially outwardly extending poles formed thereon. Each of the rotor poles is generally rectangular in cross sectional shape. The outer circumferential edges of the rotor poles are beveled at their respective junctions with the sides of the rotor pole to provide a tapered end. Each of the rotor poles defines a width which is measured at the outer circumferential surface thereof, extending between the twobeveled edges. The rotor poles also defines a pitch which is measured from one point on a first rotor pole to the same point on the adjacent rotor pole. The ratio of the rotor pole width to the rotor pole pitch is in the range of from about 0.40 to about 0.47. Preferably, a motor having N stator poles will have 2N stator pole teeth, and a rotor employed in such a motor 20 will have (2N)+2 rotor teeth.
Kolomeitsev Sergei F.
Dana Corporation
Ridout & Maybee Llp
LandOfFree
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