Electrician's Technical Reference: Motors / Edition 1

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Electrician's Technical Reference — Motors builds an understanding of the operation, theory and applications of motors. It provides information on troubleshooting different types of motors and includes some of the latest information on the EPACT laws. This is the perfect source for engineers in the industrial, electrical, mechanical and civil fields. This series of technical reference books is designed to provide the electrician, electrical contractor, industrial maintenance technician, and other electrical workers with a source of reference information about virtually all of the electrical topics that they encounter. Each topic is written by an expert in that subject matter. The modular format makes this a practical reference, and the volumes are kept to a very concise and easy-to-reference size. This series is sure to answer all of the electrical questions one might encounter on the job.

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Product Details

  • ISBN-13: 9780827385139
  • Publisher: Cengage Learning
  • Publication date: 7/28/1998
  • Series: Electricians Technical Reference Series
  • Edition description: New Edition
  • Edition number: 1
  • Pages: 326
  • Product dimensions: 7.40 (w) x 9.10 (h) x 0.90 (d)

Meet the Author

David R. Carpenter is the owner of the Integrity Electrical Services. Mr. Carpenter also works as Chief Electrical Inspector and Plan Reviewer for the City of Florence.

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Table of Contents

PART I: GENERAL INFORMATION. UNDERSTANDING NAMEPLATE INFORMATION: Cases Study. MOTOR THEORY: Motor Operation. Magnetic Fields and Forces in a Motor. Motor. Motor Construction. Rotating Magnetic Fields. Electric Motor Output. How to Determine the Horsepower of a Motor. Speed. Speed Regulation. Formulas for Speed. Speed Categories. Torque. Torque, Voltage, and Current Relationship of the Motor. MOTOR LOSSES. MOTOR EFFICIENCY. MOTOR STARTING CURRENT. MOTOR MAINTENANCE AND INSTALLATION: Bearings. Maintenance and Installation of Bearings. MAINTENANCE CHECKS OF A MOTOR: Preventive maintenance checklist. ENCLOSURES. BRAKES: Dynamic. Braking. DC Braking. Mechanical Brakes. Disk Brake. 2 DESIGNING MOTOR FEEDER, BRANCH CIRCUIT, OVERLOADS AND MOTOR APPLICATIONS. THE PURPOSE OF OVERLOADS: Principles of Overload Operation. Thermal, Bi-metalic, Relay and Electronic Overloads. Designing Overload Protection. Applying Overload Protection (Heaters). DESIGN AND APPLICATION OF BRANCH CIRCUIT PROTECTION: Principles of Overcurrent Protection. The Typical Methods of Overcurrent Protection. Sizing Branch Circuit Conductors. Sizing Wound Rotor Circuit Conductors. Sizing Branch Circuit Overcurrent Protection. DESIGNING AND APPLICATION OF FEEDER PROTECTION: Principles of Overcurrent Protection. The Typical Methods of Overcurrent Protection. Sizing Feeder Conductors. Sizing Feeder Circuit Overcurrent Protection. DESIGN AND APPLICATION OF DISCONNECTING MEANS: Sizing Disconnects. Location of Disconnect. Type Enclosure. DESIGN AND APPLICATION OF CONTROLLER: Methods of Controller Use. Number of Controllers Served By One Controller. Type Enclosure. NEMA Design Type. MOTOR APPLICATION: Matching the Motor to the Load. Matching AC Motor and Drives. CAPACITOR MOTORS, SPLIT PHASE AND SINGLE PHASE MOTORS: Operation of Split-Phase and Capacitor-Start Motors. Starting winding. Switches. Reversing. Connections. Permanent-Split Capacitor Motors. Two-Value Capacitor-Start Motor. Capacitor Failure. The Right-sized Capacitor. Troubleshooting and Repair. REPULSION-TYPE MOTORS: Construction. Operation of the Repulsion-Start Induction Motor. The Repulsion-Induction Motor. Electrically Reversible Repulsion Motors. Troubleshooting and Repair. THREE-PHSE MOTORS: Operating Characteristics of Three-Phase Motors. Construction-Motors Nameplates for Dual-Voltage, Three Phase Motors. Principles of Operation of a Squirrel Cage Motor. Induction Motors with Dual Voltage Connection. Three Phase Wound Rotor Motors. Sychnronous Motors. Part Winding Motor. Troubleshooting and Repair. DIRECT-CURRENT MOTORS: Construction. Types of DC Motors. Principles of DC Motors Operation. Permanent Magnet Motors. UNIVERSAL, SHADED-POLE, FAN, AND SPECIAL MOTORS: Universal Motors. Shaded-Pole Motors. Stepper Motors. Hybrid Motors. Torque Motors. SYNCHRONOUS MOTORS, SYNCHROS; AND THREE-PHASE WOUND ROTOR INDUCTION MOTORS: Synchronous Motors. Three-Phase Wound Rotor Induction Motor. Synchros Motors. Differential Selsyn Systems. MOTOR TESTING TECHNIQUES: Ac Motors. Synchronous Motors. Dc Motors. TUNING YOUR MOTOR SYSTEM FOR INDUSTRIAL AND COMMERCIAL APPLICATION: The Electrician's Role. Power Quality Considerations. Troubleshooting and Tuning Your In-Plant Distribution System. Making The Right Choice-Choosing the Right Efficiency. Speed, Design Voltage, Enclosure, Part Load Efficiency and Power Factor. GLOSSARY. CONTACT RESOURCES. PART II: Formulas. Charts. Tables. Appendix: A, B, C, and D. Examples.

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