Patent ID: 6583530
Filing Date: 2003-06-24
Classification: H02K

Abstract:
A composite stator structure, comprising:a stator ring made of stacked magnetic silicon steel members, the stator ring being formed by a plurality of units of equal size, each unit having a concave end on one end thereof and a convex end on another end thereof, the concave end having a complementary shape with respect to the convex end and a rear wall portion with a width dimension larger than a mouth portion of the concave end, wherein an assembled stator ring with respective concave ends engaged with respective convex ends cannot be separated in a lateral direction, each unit of the stator ring having a plurality of angularly spaced embedding grooves formed in one of an inner or outer side thereof, said plurality of embedding grooves having an equal pitch, each embedding groove having a mouth defining a predetermined opening dimension of the embedding groove and a rear wall portion having a predetermined width dimension, the predetermined width dimension of the rear wall portion being wider than the opening dimension of the embedding groove; a plurality of stator teeth respectively engaged with said stator ring, each of the stator teeth being formed with an arc-shaped tooth surface on a distal end thereof, each of the stator teeth being made of magnetic silicon steel and formed by pressing and stacking, each of the stator teeth having a tooth flank extending from the distal end to a tooth tail at all opposing end of the tooth, the tooth tail having a complementary contour to a contour of a respective embedding groove with an inner end and an outer end, the inner end having a width dimension less than a width dimension of the outer end, the width dimension of the outer end of the tooth tail being smaller than a width dimension of the tooth flank; a plurality of insulating stages respectively mounted on the stator teeth, each insulating stage having a hollow post on which a winding is mounted, the post being disposed on a respective tooth flank of a corresponding tooth.