Red Seal Electrician Practice
Motor controlsQuestion 1232 of 1506

What does the driver of a stepper motor do?

  1. It acts as a linear amplifier that follows a position signal.
  2. It rectifies the line voltage into a smooth DC level for the stator.
  3. It senses the rotor speed and trims the supply frequency.
  4. It is an on-off switch that carries the phase current.
Show answer

Correct answer: It is an on-off switch that carries the phase current.

The driver only switches the phases on and off in sequence.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 13.5: Stepper Motors

Practice motor controls

Questions last reviewed: 18 October 2026