Patent ID: 7498708
Filing Date: 2009-03-03
Classification: H02K

Abstract:
1. A rotor comprising: a rotor core formed of webs defining a layout of the magnets in the rotor core, the rotor core having at least one layer of magnets forming a plurality of poles, each pole including: a plurality of slots for holding respective magnets, the slots having at least a centerline slot and two angled wing slots extending from a position at or around respective ends of the centerline slot towards an outer circumference of the rotor core, at least two ribs comprising web portions between the centerline slot and each wing slot, and a plurality of magnets arranged in corresponding slots, wherein each of the wing slots tapers from a position at or around respective ends of the centerline slot towards an outer circumference of the rotor core, and wherein the centerline slot further comprises two slots having a rib therebetween and each of the two slots have sides which extend substantially in parallel along its length.