Motors & Control Circuits

This module will focus on the principles of DC and AC motors and the various types used in industry. The student will learn the fundamentals of speed control including dynamic and regenerative braking. It also introduces the student to electronic speed control of DC motors including the installation and operation of DC drives. In addition, the fundamentals of alternating current motors and AC variable speed control systems are presented. The principles of Variable Frequency Drives  (VFDs) and their control circuits are discussed in detail.  In addition, VFD applications in industry are covered with a focus on their use in HVAC systems, Water Treatment Plants (WTPs) and Waste Water Treatment Plants (WWTPs)

Learning Outcomes:

  • Explain the purpose of a commutator in DC motors.
  • Differentiate between a stator and an armature.
  • Define torque and counter emf.
  • Name three typical dynamo configurations.
  • Explain the basic operating principle of servomotors.
  • Explain how Pulse Width Modulation is used in speed control.
  • Define the terms dynamic and regenerative braking.
  • Describe the operating principles of an AC induction motor.
  • List three advantages of universal motors over induction motors.
  • Differentiate between a cycloconverter and an inverter.
  • Explain the basic operation of a Variable Frequency Drive (VFD)
  • List five applications for VFDs in industry
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