INDUSTRIAL MOTOR DRIVES
(Leave message on voice mail)
39 or TB 1538]
Associate of Applied Science Degree in Industrial Power and Control Technology
Certificate in Industrial Power and Contro
: EEL 202
This is the third class in a three
quarter sequence of evening classes offered by the Industrial Power and Control
Technology program. This course is devoted to the study of electric drives. Th
e fundamentals of power
electronics and electric drives are covered followed by the study of electronic control of direct current and
alternating current motors. Advanced PLC (Programmable Logic Controller) programming is also discussed
and practical appl
ications of using a PLC to control an electric drive are investigated in the lab.
To provide the student with a basic understanding of power electronic devices and circuits.
To familiarize the student with the practical aspect
s of electric drives for both ac and dc motors.
To teach the student how to do advanced programming on the
line of PLCs
and use a PLC to control an electric drive.
IV. To show the student the procedure for sizing motor branch
conductors, motor branch circuit protection,
motor overload protection, and motor disconnects based on Article 430 of the National Electrical Code.
V. Upon completion of EEL 203, students will be able to:
a. State the important safety rules related
to working around electrical devices and specifically those
which relate to working with power electronics and electric drives.
b. Describe the operation of a diode.
c. State the principal characteristics of a diode.
d. Describe a single
e rectifier; a three
pulse rectifier; and a three
e. Describe the operation of a thyristor and state the principles of gate firing.
f. Using lab equipment, test a silicon
controlled rectifier to determine if th
e device is defective.
g. Using lab equipment, measure the gate trigger voltage and the holding current of a typical SCR.
h. Demonstrate the use of an SCR in controlling the half
wave phase and the full
wave phase of
an ac power control circuit.
Describe the basic operating characteristics of a UniJunction Transistor (UJT) and demonstrate
wave and full
wave phase control using a typical SCR
UJT power control circuit.
j. Describe the operation of a Triac and demonstrate ac power cont
rol using typical Triac control
k. Troubleshoot thyristor circuits using basic troubleshooting control circuits.
l. State the differences between a naturally commutated SCR circuit and a forced commutated
m. Describe the ope
ration of the following seven basic thyristor circuits:
Controlled rectifier supplying a passive load.
Controlled rectifier supplying an active load.
Naturally commutated inverter.
AC electronic contactor.
n. State the basic principle of operation of a three
o. Describe one, two and four
quadrant speed control of a dc shunt motor.
p. List several types of electronic ac drives and describe how t
to a dc or ac drive and program
it to control the speed of a
COURSE CONTENT/MAJOR TOPICS
Review of standard motors including dc motors, ac induction motors and ac synchronous motors.
Fundamental elements of power electronics.
Power semiconductor devices including diodes, thyristors, bipolar transistors and mosfets.
Rectifier bridge configurations.
Pulse Width Modulation Methods.
Fundamentals of electric drives.
ectronic control of direct current motors including dc thyristor drives and dc transistor drives.
Electronic control of alternating current motors including ac inverter drives and flux vector drives.
Basics of applying drives.
Energy saving op
portunities using drives.
Closed loop control.
Servomechanisms and servodrives.
Advanced programming of the
input and output.
Code calculations of motor branch circuits.
Code calculations of mo
tor branch circuit protection.
Code calculations of motor overload protection.
XVII. Code calculations for sizing motor disconnects.
: (Expectations of Students)
Student attendance at 90% of classes and labs.
Student must complet
e 90% of lab assignments.
Student must maintain an average of 60% on exams.
STUDENT EVALUATION METHOD
Two exams are given during the quarter.
Attendance is taken.
Ability to follow safety practices during lab sessions, ability to work with others on lab
assignments, and ability
shown in completing lab assignments will be factored into the final grade.
Electric Motor Drive (Installation and Troubleshooting),
by Glen A. Mazur & William
American Technical Publishers, Inc.
Electric Motors and Drives
Fundamentals, Types and Applications
, Third Edition, by Austin Hughes,
Programmable Logic Controllers,
Third Edition, by Frank D. Petruzella,