Three-Phase Motors – Part 1

Three-Phase Motors – Part 1


This is the third lesson in the AC/DC Motor Theory Course. This lesson defines and explains the components and functions of various three-phase motors. The lesson also defines torque and explains its role in motor operation.

Module Objectives

  • Describe the design of a squirrel cage rotor and function of components.
  • Describe the design of a wound rotor and function of a wound rotorÕs components.
  • Define torque and explain its role in motor operation.
  • Explain the design of a reluctance motor 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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