Patent ID: 7847443

Claim:
A conical modular stator comprising a plurality of stator poles assembled about an axis, each stator pole comprising: a plurality of individual teeth, each tooth molded of soft magnetic composites, each tooth comprising a face, a body and a back iron, the tooth face having a concave inner surface formed at a non-parallel orientation to the axis, the back iron having a trapezoidal shape; and a first coil on the body of the each tooth, the first coil comprising a plurality of turns of wire, the first coil disposed intermediate the face and back iron wherein the back iron holds the coil in spaced relation to the axis, and wherein the face on each tooth further includes a pocket, the tooth body having a first end adjacent the back iron and a second end spaced from the first end, the tooth body second end extending into the pocket, and wherein the second end of the tooth body has a concave surface complementary to the tooth face concave inner surface.