Motor Theory

Course Number - EMS105

Course Number - EMS105

Course Purpose

This course provides information on the principles of operation associated with motors and motor components, and the AC/DC theory of operation, including torque, pullout torque, and slip.



After completing this course, students should be able to perform the following tasks:
  • Describe the general characteristics of electric motors
  • Describe the construction and operation of DC motors
  • Identify the types of DC motors
  • Describe how DC motors are controlled
  • Describe the construction and operation of AC motors
  • Identify the types of AC motors
  • Describe how AC motors are controlled
  • Identify the information on a motor nameplate
  • Describe DC and AC motor maintenance activities
  • Describe the National Electric Testing Association guidelines for testing motors

Who Should Attend

This course is designed for electrical maintenance technicians.





Student Materials

To enhance and facilitate the students’ learning experiences, the following materials are provided as part of the course package:

  • Student Manual -  includes the key concepts, definitions, examples, and activities presented in this course

  • Lab Book - provides learning activities and hands-on practice

Hands-On Practice

Throughout this course, you will have the opportunity to practice the skills you have learned through a variety of hands-on exercises. These exercises focus on the skills introduced in each lesson.


You will also have the opportunity to combine and practice groups of key skills by completing multiple integrated practices during the course.


Next Learning Level

Once you have mastered the skills covered in this course, you may want to attend specific training, such as: Generator Theory course (EMS-110)


Course Length

This is a three-day course.

Course Agenda

Day 1

  • Explaining Motor Theory
  • Defining Motor Terminology
  • Wiring Motor Connections

Day 2

  • Applying Motor Control Methods

  • Testing Direction and Speed Controls

Day 3

  • Identifying Replacement Considerations

  • Recognizing Special Maintenance

  • Requirements

  • Performing Rotating Machinery

  • Maintenance and Testing

  • Troubleshooting and Repairing

  • Lab Exercises

  • Final Lab

  • Review

  • Written Exam

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