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Electrical transformers and rotating machines

Author: Stephen L Herman
Publisher: Clifton Park, NY : Thomson Delmar Learning, ©2006.
Edition/Format:   Print book : English : 2nd edView all editions and formats
Database:WorldCat
Summary:
"Now in its Second Edition, this book is an excellent resource for electrical students and professionals who need a comprehensive explanation of theory and practical applications of electrical machines. The book includes nine experiments enabling readers to reinforce the theory discussed earlier. Students begin with a study of magnetism and magnetic induction, single-phase isolation transformers, current  Read more...
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Material Type: Internet resource
Document Type: Book, Internet Resource
All Authors / Contributors: Stephen L Herman
ISBN: 1401899420 9781401899424
OCLC Number: 60373776
Notes: Includes index.
Description: ix, 582 pages : illustrations ; 24 cm
Contents: unit 1. Magnetism --
The Earth is a magnet --
Permanent magnets --
The electron theory of magnetism --
Magnetic materials --
Magnetic lines of force --
Electromagnetics --
Magnetic measurement --
Magnetic polarity --
Demagnetizing --
Magnetic devices --
unit 2. Magnetic induction --
Moving magnetic fields --
Determining the amount of induced voltage --
Lenz's law --
Rise time of current in an inductor --
The exponential curve --
Inductance --
Induced voltage spikes --
unit 3. Inductance in alternating-current circuits --
Inductance --
Inductive reactance --
Schematic symbols --
Inductors connected in series --
Inductors connected in parallel --
Voltage and current relationships in an inductive circuit --
Power in an inductive circuit --
Reactive power --
Q of an inductor --
unit 4. Single-phase isolation transformers --
Transformer formulas --
Isolation transformers --
unit 5. Autotransformers --
Determining voltage values --
Using transformer formulas --
Current relationships --
unit 6. Current transformers --
Clamp-on ammeters --
unit 7. Three-phase circuits --
Wye connections --
Delta connections --
Three-phase power --
Watts and VARs --
Three-phase circuit calculations --
Load 3 calculations --
Load 2 calculations --
Load 1 calculations --
Alternator calculations --
Power factor correction --
unit 8. Three-phase transformers --
Closing a Delta --
Three-phase transformer calculations --
Open-Delta connection. unit 9. Single-phase loads for three-phase transformers --
Closed Delta with center tap --
Closed Delta without center tap --
Delta-Wye connection with neutral --
unit 10. Transformer installation --
Transformer protection --
Determining conductor size for a transformer --
unit 11. Transformer cooling --
Air-cooled transformers --
Liquid-cooled transformers --
unit 12. Transformer maintenance --
Safety procedures --
Entering a transformer tank --
Maintenance of small control transformers --
Large control transformers supplying a motor control center --
Small dry-type transformers for commercial and industrial use --
Large industrial dry-type transformers for use in unit substations --
Media-cooled transformers --
Pad-mounted oil-cooled transformers --
Internal inspection and maintenance --
Insulation testing --
Oil testing --
unit 13. Harmonics --
Harmonic effects --
Circuit breaker problems --
Buss ducts and panel problems --
Determining harmonic problems on single-phase systems --
Determining harmonic problems on three-phase systems --
Dealing with harmonic problems --
Determining transformer harmonic derating factor --
unit 14. Direct current generators --
What is a generator? --
Armature windings --
Brushes --
Pole pieces --
Field windings --
Series generators --
Shunt generators --
Compound generators --
Compounding --
Countertorque --
Armature reaction --
Setting the neutral plane --
Fleming's left-hand generator rule --
Paralleling generators. unit 15. Direct current motors --
DC motor principles --
Shunt motors --
Series motors --
Compound motors --
Terminal identification for DC motors --
Determining the direction of rotation of a DC motor --
Speed control --
Field loss relay --
Horsepower --
Brushless DC motors --
Converters --
Permanent magnet motors --
Right-hand motor rule --
unit 16. Alternators --
Three-phase alternators --
The rotor --
The brushless exciter --
Alternator cooling --
Frequency --
Output voltage --
Paralleling alternators --
Sharing the load --
Field discharge protection --
unit 17. Three-phase motors --
The rotating magnetic field --
Synchronous speed --
Connecting dual-voltage three-phase motors --
Squirrel-cage induction motors --
Three-speed consequent pole motors --
Four-speed consequent pole motors --
Wound rotor induction motors --
Synchronous motors --
Selsyn motors --
unit 18. Single-phase motors --
Split-phase motors --
Resistance-start induction-run motors --
Capacitor-start induction-run motors --
Dual-voltage split-phase motors --
Determining direction of rotation for split-phase motors --
Capacitor-start capacitor-run motors (permanent-split capacitor motors) --
Shaded-pole induction motors --
Multispeed motors --
Single-phase synchronous motors --
Repulsion motors --
Construction of repulsion motors --
Repulsion-start induction-run motors --
Repulsion-induction motors --
Stepping motors --
Universal motors. unit 19. Motor maintenance and troubleshooting --
Motor bearings --
Direct current machines --
Testing alternating current motors --
Testing dual-voltage motors --
unit 20. Motor installation --
Determining motor current --
Determining conductor size for a single motor --
Overload size --
Determining locked-rotor current --
Short-circuit protection --
Starter size --
Multiple motor calculation --
Laboratory experiments --
experiment 1. Transformer basics --
experiment 2. Single-phase transformer calculations --
experiment 3. Transformer polarities --
experiment 4. Autotransformers --
experiment 5. Three-phase circuits --
experiment 6. Three-phase transformers --
experiment 7. Rotating magnetic field --
experiment 8. Three-phase dual-voltage motors --
experiment 9. Single-phase dual-voltage motors --
Appendix A. Greek alphabet --
Appendix B. Metals --
Appendix C. Full-load current direct current motors --
Appendix D. Full-load current alternating current single-phase motors --
Appendix E. Full-load current alternating current three-phase motors --
Appendix F. NEMA design codes for three-phase squirrel-cage motors --
Answers to practice problems --
Glossary.
Responsibility: Stephen L. Herman.
More information:

Abstract:

"Now in its Second Edition, this book is an excellent resource for electrical students and professionals who need a comprehensive explanation of theory and practical applications of electrical machines. The book includes nine experiments enabling readers to reinforce the theory discussed earlier. Students begin with a study of magnetism and magnetic induction, single-phase isolation transformers, current transformers, and autotransformers. A unit on three-phase power refreshes the student with basic three-phase connections and calculations before proceeding into three-phase transformers. Book jacket."--Jacket.

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