AC Motors and Controls

This module provides an introduction to the basic operation of AC motors and explains the difference between synchronous and asynchronous motors.. Starting torque and breakdown torque are described. In addition, the student will learn how to calculate synchronous speed and speed regulation of AC motors.  The advantages of PMSMs over induction motors in EV applications are also presented. The main components in AC motor speed control are also discussed.

Learning Outcomes:

Upon completion of this module the student will be able to:

  • Explain the basic operating principles of induction motors
  • Differentiate between synchronous and asynchronous motors
  • Define starting torque and breakdown torque
  • Describe how torque is developed in a 3-phase induction motor
  • Calculate synchronous speed
  • Name three types of synchronous motors
  • Describe operation of a permanent magnet synchronous motor
  • List three advantages of a PMSM over an induction motor
  • Differentiate between flux density and power density
  • Name the main components in AC motor speed control
  • Explain the difference between scalar control & vector control
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