Multiple pole axial field electromagnetic devices

An axial field electromagnetic device, comprising:

• a frame;
• rotor means rotatably mounted on said frame, said rotor means including a first core element in the form of a cylinder having an annular cross section and two opposed annular faces at either end thereof, said first core element having a first axial thickness separating said faces, a first outer diameter, a first inner diameter, a first plurality of radial slots in one of said faces, and a plurality of windings disposed within said slots, each of said slots having a slot width, a slot depth and a slot area (slot width times slot length), said slotted face having a face area (A.sub.f) equal to the difference between the annular cross-sectional area of said core and the total of said slot areas, said slots being sized such that the sum of said slot widths per pole is between approximately 30% to approximately 90% of said first axial thickness, said slot depth is between approximately 45% to approximately 75% of said axial thickness and the total of said slot areas is between approximately 27% to approximately 180% of said remaining face area (A.sub.f);
• and
• stator means attached to said frame and displaced from said rotor means to form an air gap therebetween, said stator means including a second core element in the form of a cylinder having a second annular cross section and two opposed annular faces at either end thereof, a second axial thickness;
• a second outer diameter, a second inner diameter, a second plurality of radial slots in one of said faces of said second core element and a plurality of conductor means disposed within said slots.