Patent ID: 6891306
Filing Date: 2005-05-10
Classification: H02K

Abstract:
1. A rotary electric motor, comprising a rotor disposed in an annular ring configuration about an axis of rotation, the rotor comprising a U-shaped cross-sectional configuration having sides joined by a cross portion, and a plurality of permanent magnets formed on the sides and cross portion; and a stator at least partially surrounded by the rotor, the stator comprising a plurality of ferromagnetically isolated electromagnet core segments; wherein the stator segments are separated from the rotor by a radial air gap and a plurality of axial air gaps; wherein each stator electromagnet core segment comprises a pair of poles aligned in a direction generally parallel to the axis of rotation and joined by a ferromagnetic connecting portion having a winding formed thereon; and each pole has a first pole surface, generally perpendicular to the axis of rotation and facing one of the axial air gaps, and a second surface facing the radial air gap.