Mar 27, 2023  
2015-2016 Undergraduate Academic Catalog 
2015-2016 Undergraduate Academic Catalog [ARCHIVED CATALOG]

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ET 4500 - Electric Motors

2 lecture hours 2 lab hours 3 credits
Course Description
The emphasis in this course is on the examination of different electric motors that are used in common industrial power systems. Students are introduced to terminology, principles of operation, characteristics, and performance curves of various types of AC and DC machines as well as their proper selection, connections and applications. Practical transformers and relays are also considered. The laboratory is used to illustrate and reinforce these electric motor topics and measurement techniques, and to develop a working knowledge of Programmable Logic Controllers (PLCs), their interfaces, and programming. In this course, students are provided with instruction in the common industrial power systems and the corresponding calculations. (prereq: ET 1520 )
Course Learning Outcomes
Upon successful completion of this course, the student will be able to:
  • Define the magnetic principles as applied to rotating and other electromechanical equipment
  • Describe the characteristics and capabilities of the various types of electrical machines, both AC and DC
  • Select the proper motor for their application
  • Define and apply motor characteristic curves
  • Perform 3-phase complex power calculations
  • Specify components for power factor correction
  • Define the various types of motor (speed/torque) control based on the motor characteristic data
  • Describe the characteristics and capabilities of single- and three-phase transformers
  • Describe the basic operation of, and be able to program, a PLC

Prerequisites by Topic
  • AC and DC circuit analysis
  • Trigonometry and algebra
  • Magnetic field concepts

Course Topics
  • Fundamental principles of electricity, magnetism, and electromechanical energy conversion (2 classes)
  • Magnetic circuits, machine theory and operation (1 class)
  • Principles of DC machines (3 classes)
  • Single phase circuits and power (1 class)
  • Transformers (2 classes)
  • Three phase circuits and power (2 classes)
  • Three phase induction motors (4 classes)
  • Synchronous machines (1 class)
  • Sizing motors to various types of loads (1 class)
  • Other three-phase motors, single-phase motors (1 class)
  • Exams (2 classes)

Laboratory Topics
  • Equipment safety, measurement equipment and methods for AC and DC
  • Magnetization Curve of a DC Generator
  • DC Motor Load Characteristics
  • Single phase complex power and power factor correction
  • Single-Phase Transformers
  • Three-Phase Transformers
  • Squirrel Cage Induction Motor Characteristics
  • Squirrel Cage Induction Motors and Variable Speed Drives
  • Basics of Programmable Controllers

Glenn Wrate

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