Electric Motor Fundamentals

Electric Motor Fundamentals introduces learners to basic electrical concepts relevant to motors, the different types of electric motors and nameplates utilized in the industry, as well as common failure modes. This course depicts the inner workings of the various types of electric motors with in-depth animations and illustrations, as well as short GIFs portraying the different motor failures. The material in this course is beneficial for both those who contain some knowledge of electric motors, and those who are new to the industry.


Learning Objectives

  • Recognize the difference between an electric motor and a generator.
  • Recall basic electrical concepts to further understand how an electric motor works.
  • Learn and understand the functional elements of an electric motor.
  • Differentiate between the types of electric motors, their components, applications, and advantages as well as disadvantages.
  • Examine the difference between the European and U.S. standard nameplates.
  • Understand and recognize various failure modes that may occur in electric motors and their causes, along with corrective actions.
Course Length: 3 HRS

Table of Contents

Electric Motor Basic Concepts

  • Electric Motor vs. Generator
  • Basic Electrical Concepts
    • Direct Current (DC)
    • Alternating Current (AC)
    • Single and Three-Phase Power
    • Series and Parallel Connections
  • Functional Elements of a Motor
    • Magnets
    • Terminal Box
    • Electromagnetic Components: Squirrel Cage Rotor
    • Electromagnetic Components: Wound Rotor
    • Electromagnetic Components: Permanent Magnet Rotor
    • Electromagnetic Components: Stator
    • Mechanical Components: Shaft and Bearings
    • Mechanical Components: Housing
    • Thermal Cooling
    • Electric Motor Energy Conversion

Types of Motors

  • DC Motors
    • Brushed DC Motors: Series-Wound
    • Brushed DC Motors: Shunt-Wound
    • Brushed DC Motors: Compound
    • Brushed DC Motors: Permanent Magnet
    • Brushless DC Motors
  • AC Motors
    • AC Induction Motors: Single-Phase Induction
    • AC Induction Motors: Three-Phase Induction
    • AC Synchronous Motors

Nameplates and Failure Modes

  • Motor Nameplates
    • IEC Nameplate
    • NEMA Nameplate
  • Common Failure Modes
    • Bearing Failure
    • Stator Winding Failure
    • External Failure
    • Rotor Winding Failure
    • Shaft Coupling Failure
    • Other Failures

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