| 摘要 |
PCT No. PCT/EP91/01729 Sec. 371 Date Jul. 14, 1992 Sec. 102(e) Date Jul. 14, 1992 PCT Filed Sep. 11, 1991 PCT Pub. No. WO92/05618 PCT Pub. Date Apr. 2, 1992.An electric machine includes an exciter part and an induction part disposed adjacent the exciter part. The exciter part and the induction part define an air gap there-between and are movable relative to one another thereby defining a direction of movement. The induction part includes teeth disposed adjacent one another and projecting in a direction toward the air gap. The teeth define grooves therebetween, each of the teeth having a tooth base and a tooth tip adjacent the air gap. In addition, each of a plurality of the teeth further includes a middle portion having two ends and a constant width defined in a direction along the air gap and perpendicular to the direction of movement; and a pair of tooth widening portions, each of the tooth widening portions having a free end and a transition end and being located at one of the two ends of the middle portion at the transition end thereof for forming one of the plurality of the teeth with the middle portion. Each of the tooth widening portions further has a dimension defined in the direction of movement which decreases from a corresponding end of the middle portion toward the free end, and a width defined in the direction along the air gap and perpendicular to the direction of movement which decreases from a corresponding tooth base toward a corresponding tooth tip. |
