Herman, Stephen L.
Electrical transformers and rotating machines / Stephen L. Herman. - 2nd ed. - Clifton Park, NY : Thomson Delmar Learning, c2006. - ix, 582 p. : ill. ; 24 cm.
Includes index.
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.
"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.
1401899420 9781401899424
2005013648
Electric transformers.
Electric generators.
Electric motors.
TK2551 / .H4745 2006
621.31/4
Electrical transformers and rotating machines / Stephen L. Herman. - 2nd ed. - Clifton Park, NY : Thomson Delmar Learning, c2006. - ix, 582 p. : ill. ; 24 cm.
Includes index.
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.
"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.
1401899420 9781401899424
2005013648
Electric transformers.
Electric generators.
Electric motors.
TK2551 / .H4745 2006
621.31/4