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More About This Textbook
Overview
Obtain quick and easy access to information on DC and AC motors, various types of manual, magnetic, and electronic controls, and the installation and maintenance functions of each. Updated to the 2008 National Electrical Code and featuring safety references to the most current OSHA Safe Work policies, Electricity 4: AC/DC Motors, Controls, and Maintenance, 9th Edition provides practical, hands-on information to get the electrical system operating as well as the theory of "why" the system works to aid in troubleshooting. The Ninth Edition features material on Variable Frequency Drives (VFDs) and newer controls for servo and small motors. Current practices and equipment have also been added to the Maintenance section to better enable readers to troubleshoot motors and control problems.
About the Author:
Jeff Keljik is a graduate of Dunwoody College of Technology and holds a Bachelor's degree from Metropolitan State University
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Meet the Author
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.
Table of Contents
Preface vii
The DC Shunt Motor 1
The DC Series Motor 19
DC Compound Motors 25
Summary Review of Units 1-3 33
Manual Starting of DC Motors 37
Electronic DC Motor Control 45
Basic Principles of Automatic Motor Control 59
The DC Cemf Motor Controller and DC Variable-Speed Motor Drives 69
Dynamic Braking With a DC Motor-Reversal Control 83
Summary Review of Units 5-9 89
Electromechanical and Solid-State Relays and Timers 93
The Three-Phase, Squirrel-Cage Induction Motor 105
Starting Three-Phase, Squirrel-Cage Induction Motors 129
Controllers for Three-Phase Motors 149
The Three-Phase, Wound-Rotor Induction Motor 183
Solid-State Starters and Controls 197
Summary Review of Units 11-16 219
The Synchronous Motor 227
Three-Phase Motor Installations 239
Single-Phase Induction Motors 255
Energy-Efficient Motors 287
AC Series and Repulsion Motors 295
Selsyn Units 311
Motor Maintenance 317
Summary Review of Units18-24 333
Glossary 341
Index 351