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A motor circle with multiple winding connections.
Also known as: Stepping motor, Step motor, Motor with many windings
A stepper motor moves in fixed angular increments, one per electrical step, so its position is known without any feedback sensor — as long as it has not missed a step. That open-loop positioning is why it is drawn with all its windings brought out.
Denotes a stepper motor: a motor rotating in discrete fixed angular increments driven by sequenced winding excitation.
Contexts: Electrical equipment
Permits open-loop position control, since counting steps gives position without a feedback sensor.
Contexts: Electrical equipment
Loses that guarantee silently if it misses a step under excessive load, which is the failure mode open-loop control cannot detect.
Contexts: Electrical equipment
A circle marked with the letter M and a step indication, with four or more winding leads emerging from it.