H - Electricity – 02 – K
Patent
H - Electricity
02
K
H02K 19/20 (2006.01) H02K 19/10 (2006.01) H02K 29/06 (2006.01)
Patent
CA 2097194
A switched reluctance motor driven by a polyphase source includes a stator (3) having a yoke (6) and a plurality of evenly spaced salient poles (9, 10) distributed about the yoke (6) and a rotor (1) mounted for rotation relative to the stator (3) having a plurality of unevenly spaced salient poles (5). The geometry of the stator (3) and rotor (1) is such that each of the stator poles (9, 10) is separated from an adjacent stator pole (9, 10) by an angle a1 and the poles (5) of the rotor (1) are alternately spaced from adjacent rotor poles (5) by angles a1 and a2. Windings (7) associated with the poles of the stator are connected to be driven by a polyphase source such that two phases (A, B) of the source are energized simultaneously. The simultaneous energiza- tion of two phases results in pairs of adjacent stator poles being magnetized with opposite polarity, thereby forming a mag- netic circuit (36) whose path includes only the portion of the yoke bridging the two adjacent stator poles of a pair. The motor of the invention provides substantially improved torque performance relative to a conventional switched reluctance motor of the same size, while also providing improved efficiency.
Baldor Electric Company
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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