A high-accuracy motor drive system for facsimile equipment

The development of a high-accuracy low-speed reluctance synchronous motor is described. Low rotational speed, 60 rpm (revolutions per minute), is obtained directly from a high-frequency 1,800-cps (cycles per second) drive signal by the use of a Vernier drive technique. Of particular interest is the self-starting capability in a reluctance synchronous motor. High torque and great positional accuracy are obtained by unconventional design techniques. Possible applications include use as a high-torque stepping motor.