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AC/DC Motor Theory

Overview

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.

Objective

  • Identify the components of an AC Motor and explain their function.
  • Explain the basic principles of magnetism.
  • Interpret the characteristics of a current as represented on a sine wave.
  • Describe the effect of AC current on a conductor.
  • Describe the methods of increasing magnetic flux in a conductor.
  • Explain how a rotating field is created in an AC Motor.
  • Explain and be able to calculate synchronous speed.
  • Explain induction and its effect on a rotor.
  • Explain the relationship between phased current and rotor spin.
  • Explain slip and know its formula.
  • Describe the design of a squirrel cage rotor and function of components.
  • Describe the design of a wound rotor and function of a wound rotor’s components.
  • Define torque and explain its role in motor operation.
  • Explain the design of a reluctance motor and how it works.
  • Explain the design of an externally excited motor.
  • Explain how an externally excited motor works.
  • Explain the function of a motor starter and the most common types of motor starters.
  • Describe a variable speed drive and its effect on voltage and frequency.
  • Distinguish a single-phase motor from a three-phase motor.
  • Explain the design of a split-phase motor and how it works.
  • Explain the design of a capacitance start motor and how it works.
  • Identify the general characteristics and advantages of a DC motor.
  • Identify the basic components of a DC motor.
  • Explain the function of DC motor components.
  • Identify the components of the armature and brush assembly; explain their function.
  • Explain the effect of armature current on the main flux field and motor action
  • Explain the process of commutation and how it maintains direct current in a DC motor.
  • Describe how the number of windings and commutator segments effects torque and mechanical power of a DC motor.
  • Explain how armature reaction shifts the neutral plane in a DC motor.
  • Explain how armature reaction affects motor operation.
  • Explain what measures will correct armature reaction.
  • List the requirements for induced voltage in a motor.
  • Explain counter-EMF.
  • Explain the design of a series wound DC motor and how it works.
  • Explain the design of a shunt wound DC motor and how it works.
  • Explain the design of a compound wound DC motor and how it works.
  • Explain the design of a permanent magnet DC motor and how it works.
  • Explain how a universal motor runs off of DC power.
  • Explain the design of a brushless DC motor and how it works.
  • 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 drive’s control system and how it works

Complete Course

(includes all 11 modules)

  • AC/DC Motor Theory

Modules

Showing all 12 results

  • Introduction to AC Components and Motors

  • Introduction to DC Motor Theory

  • Armature Reaction, Compensation, and Induced Voltage

  • Series, Shunt, and Compound DC Motors

  • Permanent Magnet, Universal, and Brushless DC Motors

  • DC Motor Controls

  • Advanced AC Motor Principles

  • Three-Phase Motors – Part 1

  • Three-Phase Motors – Part 2

  • Single-Phase Motors

  • Introduction to DC Motors

  • AC/DC Motor Theory

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