Patent ID: 9369011
Filing Date: 2016-06-14
CPC Classification: H02K

Claim Text:
1. An unidirectional electric machine comprising a permanent-magnet rotor and a stator, the stator comprising a pair of opposing poles, wherein each pole has a pole are extending between a leading edge and a trailing edge relative to a single direction of rotation of the rotor, each pole is thicker in a region adjacent to the leading edge in a respective first direction that is normal to the rotational axis of the rotor that in a region adjacent to the trailing edge in a respective second direction which is normal to the rotational axis of the rotor, the single direction defined as the direction from the thicker leading edge of one pole toward the thinner trailing edge of the same pole, and an air gap between the rotor and the pole are at the leading edge that is thicker than the trailing edge is greater than between the rotor and the pole are the trailing edge, such that the distance separating the thicker leading edges of the opposing poles is greater than the distance separating the thinner trailing edges of the opposing poles.