Patent ID: 8829742

Claim:
An electric machine, comprising: a rotor, the rotor further including: having a cylindrical shape and a central axis; an axial bore adapted to receive a shaft; an outer circumference adapted to receive a plurality of permanent magnets comprising of permanent magnet material, wherein each permanent magnet has a magnetic flux density between 70 and 95 percent of a residual magnetic flux density of the permanent magnet material; a stator, the stator further including: having a cylindrical shape and a longitudinal axis; an outer circumference; a plurality of teeth disposed in an equidistant angular relationship, each tooth projecting inwardly toward the longitudinal axis, the teeth creating a discontinuous inner circumference configured to accept the rotor within the stator such that the longitudinal axis of stator is aligned with the central axis of the rotor and the rotor is rotatable within the inner circumference of the stator; a stator slot of predetermined shape and size disposed between each tooth and adapted to receive a predetermined number of strands of conducting material to form an electrical winding around at least one tooth; a current density ranging between 3 and 8 Amp/mm 2 ; a predetermined number of poles, whereby the number of poles is directly proportional to an electrical frequency of the electric machine and inversely proportional to a number of required coil windings; a torque angle between 2 and 10 degrees; and an air gap between the outer circumference of the rotor and the inner circumference of the stator when the rotor is disposed within the stator.