Patent ID: 6472792
Filing Date: 2002-10-29
Classification: H02K

Abstract:
A stator core for an electrical machine, comprising;an annular yoke having a plurality of teeth spaced circumferentially on the annular yoke and extending radially therefrom, spaces between the teeth defining a plurality of circumferentially spaced winding slots, wherein each of the plurality of teeth is formed as a separate component from a soft magnetic powder material, each tooth having non-decreasing cross-sectional dimensions in a direction towards a distal tip along a length of the tooth corresponding to one of the respective winding slots, and having the same or smaller cross-sectional dimensions along a proximal end of the tooth; wherein the annular yoke comprises a plurality of core-back sections corresponding in number to the number of said plurality of teeth such that each of the plurality of teeth can be assembled with one of said core-back sections of the annular yoke for receiving a coil before assembly of the annular yoke; wherein each said core-back section includes an opening; and wherein a portion of each said tooth is received in the opening in a corresponding said core-back section, the portion of each said tooth being enclosed essentially entirely along a perimeter of the tooth by the corresponding said core-back section, the perimeter being in a plane essentially orthogonal to said radial direction.