DC Motor Controls

DC Motor Controls


This is the final lesson in the AC/DC Motor Theory Course. This lesson trains participants in starters, rotation direction, speed control, and drive controls of DC motors.

Module Objectives

  • Explain why a reduced voltage starter is sometimes needed in a motor.
  • Explain how a reduced voltage starter works.
  • Explain what determines the direction of rotation of a DC motor.
  • Explain how a reverse contactor works.
  • Explain how to control the speed of a DC motor.
  • Explain how a tapped resistor works.
  • Explain a DC driveƕs control system and how it works.


The AC/DC Motor Theory course was specifically developed for electricians and electronic technicians as well as for the multi-craft training needs of process and manufacturing facilities. This course consists of 11 interactive, on-line lessons that address AC and DC motor theory.


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