Print this page Induction Motor Theory
Jerry Bednarczyk, P.E.
Course Outline
This course will
present a review of the development of the equivalent motor circuit and the
various formulas that the engineer can use to determine the induction motor
characteristics to best suit the application. The course will require approximately
3 hours of study time to review and comprehend the contents. A calculator is
required with trigonometric functions.
This course includes a multiple-choice quiz at the end, which is designed to
enhance the understanding of the course materials.
Learning Objective
At the conclusion of this course, the student will:
- Have a basic understanding of induction motors;
- Able to develop an induction motor equivalent circuit;
- Understand the basic formulas to determine motor characteristics;
- Be able to determine how varying a particular motor characteristic will impact other characteristics; and
- Determine the
following characteristics of an induction motor:
- Synchronous speed
- Rotor speed / motor slip
- Total motor power input
- Motor power output
- Motor efficiency
- Torque developed by the motor
- Total impedance
of a motor
Intended Audience
The course is recommended primarily for Electrical Engineers or others desiring a basic understanding of the characteristics of an AC induction motor.
Course Introduction
The characteristics
of an induction motor are best determined by a series of tests, generally under
load. However, for large motors, this is not always practical. The motor characteristics
can be approximated by calculations using an equivalent circuit for the motor
and using a series of formulas.
Course
Content
The course content is in a PDF file Induction Motor Theory. You need to open or download this document to study this course.
Course Summary
These formulas,
while presenting idealized conditions in a relatively simplified manner, provide
the engineer a basic understanding of the variables to be considered in the
design of motors. Factors such as motor starting factors (i.e; high inrush currents),
varying speeds and other items all would need to be considered in the total
design.
Related Links
For additional information related to this subject, please visit the following websites or webpages:
Wikipedia - http://www.en.wikipedia.com
Electric Motors Reference Center - http://www.electricmotors.machinedesign.com
LM Photonics -
http://www.lmphotonics.com
Quiz
Once you finish studying the above course content, you need to take a quiz to obtain the PDH credits.
DISCLAIMER: The materials contained in the online course are not intended as a representation or warranty on the part of PDHonline.com or any other person/organization named herein. The materials are for general information only. They are not a substitute for competent professional advice. Application of this information to a specific project should be reviewed by a registered professional engineer. Anyone making use of the information set forth herein does so at their own risk and assumes any and all resulting liability arising therefrom.
