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Understanding Motor Controls 3rd Edition

Stephen L. Herman

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Overview

UNDERSTANDING MOTOR CONTROLS, 3rd Edition introduces basic principles and progresses from learning about common motor control components to how to use them in circuits. The new edition has illustrations concerning troubleshooting circuits and offers explanations of the basic types of meters and test equipment needed for troubleshooting control circuits. Written in accord with the National Electrical Code, Chapter 37 on the installation of motors has been completely updated Using actual motor control components, hands-on laboratory experiments enable students to put what they learn into practice. These experiments start with simple circuits and progress to more complicated circuits involving the use of timing relays and an auto-transformer starter.

Stephen L. Herman, Lee College (retired)

Stephen L. Herman is a retired electrician and teacher with more than 30 years of experience to his credit. A seasoned author, his reader-friendly textbooks on electricity and mathematics are popular with students and instructors alike. For two decades Mr. Herman was lead instructor for the Electrical Technology Curriculum at Lee College in Baytown, Texas, where he received an Excellence in Education Award from the Halliburton Education Foundation. He also taught at Randolph Community College in Asheboro, N.C., for nine years and helped establish an electrical curriculum for Northeast Texas Community College in Mount Pleasant, Texas. His additional publications include ELECTRIC MOTOR CONTROL, ELECTRICITY AND CONTROLS FOR HVAC/R, INDUSTRIAL MOTOR CONTROLS, UNDERSTANDING MOTOR CONTROLS, ELECTRONICS FOR ELECTRICIANS, ALTERNATING CURRENT FUNDAMENTALS, DIRECT CURRENT FUNDAMENTALS, ELECTRICAL STUDIES FOR TRADES, ELECTRICAL PRINCIPLES, EXPERIMENTS IN ELECTRICITY FOR USE WITH LAB VOLT EQUIPMENT, THE COMPLETE LABORATORY MANUAL FOR ELECTRICITY, and PRACTICAL PROBLEMS IN MATHEMATICS FOR ELECTRICIANS.

MindTap® is the digital learning solution that powers students from memorization to mastery. It gives you complete control of your course—to provide engaging content, to challenge every individual, and to build their confidence. Empower students to accelerate their progress with MindTap.

  • Providing flexibility and accessibility, lab experiments are not based on a particular brand relay, timer, or other piece of equipment but can be constructed from common motor control components.
  • Detailed examples show students how to convert a ladder or schematic diagram to a wiring diagram, which is the first step in learning how to connect a working circuit using a schematic diagram. This concept also helps students understand the logic of a circuit, which aids in learning troubleshooting techniques.
  • Extremely student friendly, the text is written in an easy to read and understand level. Many practical illustrations explain in a step-by-step sequence how the logic of a circuit works -- ensuring thorough student understanding.

Understanding Motor Controls

TABLE OF CONTENTS

Preface.
Safety.
Section I: BASIC CONTROL CIRCUITS AND COMPONENTS.
1. General Principles of Motor Control.
2. Symbols and Schematic Diagrams.
3. Manual Starters.
4. Overload Relays.
5. Relays, Contactors, and Motor Starters.
6. The Control Transformer.
Section II: BASIC CONTROL CIRCUITS.
7. Start-Stop Pushbutton Control.
8. Multiple Pushbutton Stations.
9. Forward-Reverse Control.
10. Jogging and Inching.
11. Timing Relays.
12. Sequence Control.
Section III: SENSING DEVICES.
13. Pressure Switches and Sensors.
14. Float Switches and Liquid Level Sensors.
15. Flow Switches.
16. Limit Switches.
17. Temperature Sensing Devices.
18. Hall Effect Sensors.
19. Proximity Detectors.
20. Photodetectors.
21. Reading Large Schematic Diagrams.
22. Installing Control Systems.
Section IV: STARTING AND BRAKING METHODS.
23. Across-the-Line Starting.
24. Resistor and Reactor Starting for AC Motors.
25. Autotransformer Starting.
26. Wye-Delta Starting.
27. Part Winding Starting.
28. Direct Current Motors.
29. Single-Phase Motors.
30. Braking.
Section V: WOUND ROTOR, SYNCHRONOUS, AND CONSEQUENT POLE MOTORS.
31. Wound Rotor Motors.
32. Synchronous Motors.
33. Consequent Pole Motors.
Section VI: VARIABLE SPEED DRIVES.
34. Variable Voltage and Magnetic Clutches.
35. Solid State DC Motor Controls.
36. Variable Frequency Control.
Section VII: MOTOR INSTALLATION.
37. Motor Installation.
Section VIII: PROGRAMMABLE LOGIC CONTROLLERS.
38. Programmable Logic Controllers.
39. Programming a PLC.
40. Analog Sensing for Programmable Logic Controllers.
Section IX: DEVELOPING CONTROL CIRCUITS AND TROUBLESHOOTING.
41. Developing Control Circuits.
42. Troubleshooting.
Section X: LABORATORY EXERCISES.
Appendix.
Glossary.

Cengage provides a range of supplements that are updated in coordination with the main title selection. For more information about these supplements, contact your Learning Consultant.

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