Electric Motors and Motor Controls

ISBN-10: 1401898416
ISBN-13: 9781401898410
Edition: 2nd 2007 (Revised)
Authors: Jeff Keljik
List price: $299.95 Buy it from $131.27
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Description: This book is designed for the electrical professional who needs to know motor control from the practical viewpoint. It is designed to introduce basic controls then build to the more complex controls for various motors and various applications. It is  More...

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Book details

List price: $299.95
Edition: 2nd
Copyright year: 2007
Publisher: Delmar Cengage Learning
Publication date: 6/14/2006
Binding: Hardcover
Pages: 416
Size: 7.25" wide x 9.25" long x 0.75" tall
Weight: 2.002
Language: English

This book is designed for the electrical professional who needs to know motor control from the practical viewpoint. It is designed to introduce basic controls then build to the more complex controls for various motors and various applications. It is designed for a troubleshooter who needs to know not only modern controls but older controls that are still in use. The HOW and WHY controls are designed to perform the desired operations are important concepts to be understood. Along with motor controls of all types, motors are analyzed to provide the reader with the proper application for a particular need. Matching system needs with motor characteristics and capabilities is easier with foundational knowledge of motor theory. Use of the National Electrical Code is used to acquaint readers with how to install and maintain motor systems.

Jeff Keljik served as head of the electrical department at Dunwoody College of Technology where he played an integral part in developing the Electrical Design and Management program. He also serves as chairman of the Executive Board for the North Central Electrical League and is a member of the Minnesota Electrical Association Education Committee. The author of ELECTRIC MOTOR AND MOTOR CONTROLS (Cengage Learning), Mr. Keljik is also a contributing writer-editor for AC THEORY & DC THEORY, 3e (Cengage Learning). His honors include the 1993 Kraemer Fellowship Award for new technology education and an award for International Technical Teacher Education. A graduate of Dunwoody College of Technology, he also holds a bachelor's degree from Metropolitan State University as well as a Master Class A license and a Journeyman's Class A license, both from the state of Minnesota.

Preface
Acknowledgments
Introduction
Single-Phase Motors
Key Terms in This Chapter
Introduction
Nameplate Information
Single-Phase Motors
Rotating Magnetic Field
Squirrel Cage Rotor Principles
Split-Phase Motors and Slip
Starting Winding Switches
Capacitor-Start, Induction-Run Motors
Other Capacitor Motors
Shaded Pole Motors
Universal Motors
Summary
Questions
Three-Phase Motors and Generators
Key Terms in This Chapter
Introduction
Three-Phase Power Generation
Frequency
Output Voltage and Current Control
Generator Output Power
Exciters
Parallel Operation of Alternators
Loss of Alternator Output
Standby and Cogeneration Systems
Three-Phase Motor Theory
Motor Rotation Checkers
Three-Phase Motor Connections
Multispeed Motors
Motor Design Letters
Power Factor of Induction Motors
Motor Efficiency
Troubleshooting
Summary
Questions
Basic Motor Control
Key Terms in This Chapter
Introduction
Manual Controls-Controller Design
Overload Protection
Two-Wire Automatic Control
Three-Wire Automatic Control
Jog and Reversing Controls
Overload Selection
Fuse Protection
NEC and Single-Phase Motor Applications
Summary
Questions
Controllers, Relays, and Timers
Key Terms in This Chapter
Introduction
Nema Contactors and Starters
IEC Standards
Pilot Devices
Photoelectric Controls
Proximity Sensors
Enclosures
Hazardous Areas and Safety
Electromechanical Controls, Relays, and Timers
Electronic Timers
Solid-State Motor Control
Contact Maintenance
Summary
Questions
Three-Phase Motors, Controls, and Full-Voltage Starting
Key Terms in This Chapter
Introduction
Manual Control
Magnetic Control
Reversing Three-Phase Motor Starters
Sequence Control/Compelling Control
Multispeed Controllers
Programmable Controllers
Electronic Speed Control
Wye-Delta Starting
Open/Closed Transition
Part Winding Starters
Phase Failure Relay
Motor Control Centers
Summary
Questions
Motor Acceleration and Deceleration
Key Terms
Introduction
Reduced Voltage Starting
Primary Resistor Starting
Autotransformer Starters
Solid-State Reduced Voltage Starting
Synchronous Motor Starting
Electrical Brakes
Plugging Controls
DC Braking
Mechanical Brakes
Summary
Questions
Motor Maintenance and Installation
Key Terms in This Chapter
Introduction
Replacement Motors
Bearings-Types and Maintenance
Megohmmeters
Growlers
Lead Identification
Delta-Connected Motors-Lead Identification
Horsepower Testing
Motor Efficiency
NEC and Size of Feeders, Disconnects, and Controllers
Disconnects, Controllers, Fuses, Branch Circuit Conductors, Overloads
Summary
Questions
Special Motors
Key Terms in This Chapter
Introduction
Wound Rotor Motor
Repulsion Motors
Synchronous Motors
Permanent Magnet Motors
Stepper Motors
Hybrid Motors
Torque Motors
Summary
Questions
Power Distribution and Monitoring Systems
Key Terms in This Chapter
Introduction
Transformers
Voltage Transformation
Transformer Design
Transformer Operation
Transformer Polarity
Transformer Losses and Regulation
Multivoltage Transformers
Transformer Connections for Voltage
Autotransformers
Control Transformers
Instrument Transformers
Three-Phase Transformers
High Leg or Wild Leg
Transformer Nameplate
NEC Requirements
Single- and Three-Phase Line Drop
Power Factor Correction
Demand Meters
Energy Management
Summary
Questions
DC Motors, Generators, and Controls
Key Terms in This Chapter
Introduction
DC Generation
Armatures
Series Generator
Shunt-Wound Generators
Compound Field Generators
Armature Reaction
Parallel Operation of DC Compound Generators
DC Motors
Speed and Direction Control
Shunt Motors
Permanent Magnet Motors
Series Motors
Brushless DC Motors
Electronic Speed Control
Manual Control of DC Motors
DC Motors and NEC
Summary
Questions
Wiring Diagrams
Formulas
Symbols
Troubleshooting
Glossary
Index

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