Abstract

Stepper motors are important in automatic control systems, computers, numerically controlled machine - tools, and other position - control applications. Their rotors move in steps in response to control pulses. Control pulses of an appropriate waveform and frequency are generated by electronic (tube - type or semiconductor) switching circuits. Depending on type of motor, this frequency may extend from 10Hz to 10KHz. Stepper motors like all the synchronous machines are classified as permanent - magnet, variable - reluctance - type machines ...