Induction Motor Theory
Jerry Bednarczyk, P.E.
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.
At the conclusion of this course, the student will:
The course is recommended primarily for Electrical Engineers or others desiring a basic understanding of the characteristics of an AC induction motor.
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.
The course content is in a PDF file Induction Motor Theory. You need to open or download this document to study this course.
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
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 -