Stepper motor and method of making the same

摘要: A multi-phase stepper motor having an annular permanent magnetic rotor and a plurality of matingly engageable stator phase assemblies around the rotor. Each comprises pair pole pieces including interleaved salient poles. The in each are mated together opposed relationship to form space between them receive energizing winding, winding for is different phase. Depending upon number assemblies, machine can operate more than two phases. diameter about 55 percent 75 diameter, approximately 40 torque produced with equivalent sized conventional motors.