Audel Electric Motors

Inhaltsverzeichnis

Preface.Acknowledgments.About the Authors.Chapter 1: Motor Principles.Magnetic Attraction and Repulsion.Electromagnets.Induced Currents.Direct-Current (DC) Generators.Types of DC Generators.Control of DC Generators.Direct-Current Motors.Alternating-Current Motors.Polyphase Machines.Single-Phase Motors.Motor Control.Summary.Review Questions.Chapter 2: Small DC and Universal Motors.Shunt DC Motors.Compound Motors.Permanent-Magnet Motors.Series or Universal Motors.Repairing a Series (Universal) Motor.Miscellaneous Information.Summary.Review Questions.Chapter 3: Commutators and Brushes.The Armature.Magnet Wire Characteristics.Brushes.Summary.Review Questions.Chapter 4: Split-Phase Motors.Starting a Single-Phase Motor.Starting a Split-Phase Motor.Characteristics of the Split-Phase Motor.Dual-Frequency Operation.Motor Noise and Vibration.Summary.Review Questions.Chapter 5: Capacitor-Start Motors/Capacitor-Run Motors.Starting a Capacitor-Start Motor.The Electrolytic Capacitor.Characteristics of the Electrolytic Capacitor.Characteristics of Capacitor Motors.Reversing the Motor.Dual-Frequency Operation.Mechanical and Electrical Noises.The Capacitor-Run Motor.Reversing the Capacitor-Run Motor.Summary.Review Questions.Chapter 6: Shaded-Pole Motors.Starting the Shaded-Pole Motor.Types of Shaded-Pole Motors.Construction of Shaded-Pole Motors.Performance of Shaded-Pole Motors.Applications of Shaded-Pole Motors.Summary.Review Questions.Chapter 7: Three-Phase Motors.Uses of Three-Phase Motors.How Three-Phase Motors Work.Torque.Reversibility.Applications of Three-Phase Motors.Summary.Review Questions.Chapter 8: Squirrel-Cage Motors.Construction.Principles of Operation.Speed.Torque.Classification.Starting.Control Equipment.Application.Troubleshooting with the Split-Core Volt-Ammeter.Summary.Review Questions.Chapter 9: Three-Speed and Instant Reversing Motors.Understanding the Nameplate.Troubles.Bearings.Three-Speed Motors.Instant-Reversing Motors.Reversing Starter.Severe-Duty Motors.Farm-Duty Motors.High-Slip Motors.Explosion-Proof Motors.Other Motors.Metric Motor Ratings.Summary.Review Questions.Chapter 10: Steppers and Synchronous Motors.Shaded-Pole Unidirectional Synchronous Motors.Capacitor Start-and-Run, Bidirectional Synchronous Motor.Single-Phase, Stepper Motor (Unipolar Drive).Single-Phase, Stepper Motor (Bipolar Drive).Two-Phase, Stepper Motor (Unipolar Drive).Four-Phase, Stepper Motor (Unipolar Drive).Open-Frame, Synchronous and Stepper Motor.Reversible Step-Servo Motor.High-Torque, Reversible AC Motor.Three-Wire, Stepper Motor (Open Frame).Summary.Review Questions.Chapter 11: Wound-Rotor Motors.Characteristics.Control Equipment.Application.Operating Speed Variation.Troubleshooting.Summary.Review Questions.Chapter 12: Fractional-Horsepower Motors.Split-Phase Induction Motors.Capacitor-Start Motors.Permanent-Capacitor Motors.Repulsion Motors.Shaded-Pole Motors.Universal Motors.Reluctance-Synchronous Motors.Hysteresis-Synchronous Motors.Speed Control.Application.Summary.Review Questions.Chapter 13: Motor Selection and Replacement.Selection of Motor Type.Motor Mounting.Part-Winding Starting.Enclosures and Special Winding Treatment.Guide to Selecting the Right Motor.Installation (Power Supply/Connections).Operation of 230-V Motors on 208-V Systems.Safety Precautions.Location and Motor Enclosures.Maintenance.Summary.Review Questions.Chapter 14: Motor Calculations.Summary.Review Questions.Chapter 15: Modifying Motors.Motor Modifications for Shafts.Speed Controls.Modifying AC Motors for Speed Control.AC Motor Speed-Control Methods.Reversing Direction of Rotation.Summary.Review Questions.Chapter 16: Switches and Relays.Overload Protection.Internal (Line Break) Motor Protector.Relays for Motor Control.Maintenance and Repair of Relays.Electronic Speed Control.Summary.Review Questions.Chapter 17: Motion Control.Disc Magnet Stepper Terminology.Disc Magnet Steppers.Using Steppers at Their Upper Limits.Disc Magnet, Two-Phase, Stepper Motor.PM, Two- and Four-Phase Stepper Motors.Two- and Four-Phase Linear Stepper Motors.Brushless DC Motors.Ironless-Rotor DC Motors.Summary.Review Questions.Chapter 18: Motor Control Methods.Selection of Motor Control.Motor Controller.Locked-Rotor Control (LRC).Enclosures.Overcurrent Protection.Overload Protection.Manual Starter.Magnetic Control.Holding Circuit Interlock.Reversing Starter.Motor-Reversing Characteristics.Timers and Timing Relays.Drum Switch.Control Station (Pushbutton Station).Limit Switch.Snap Switch.Pressure Switch.Float Switch.Solid-State, Adjustable-Speed Controllers.Summary.Review Questions.Chapter 19: Motor Repair Tools.Screwdrivers.Pliers.Hammers.Hacksaws.Wrenches.Summary.Review Questions.Chapter 20: Motor Repair Supplies.Setscrews.Carbon Brushes.Bushings and Bearings.Shaft Adapters.Rubber Mounts.Fiber Washers.Rubber Grommets.Replacement Switches.Electrolytic Capacitors.Insulating Enamel.Cord.Motor Wiring for Installation.Fuses.Summary.Review Questions.Chapter 21: General Maintenance.General Troubleshooting Procedures.Maintenance of the Split-Phase Motor.Maintenance of Capacitor Motors.Electrolytic Capacitors.Tests for Capacitors.The Permanent-Split Capacitor Motor.The Shaded-Pole Motor.Maintenance of the Three-Phase Motor.Maintenance of Brush-Type Motors.Summary.Review Questions.Chapter 22: Shafts and Bearings.Motor Shafts.Rotor and Shaft.Selection of Bearings.Summary.Review Questions.Appendix A: Miscellaneous Information.Appendix B: Wiring Diagrams.Appendix C: Motor Connections.Glossary.Index.

Portrait

Rex Miller is a former Professor of Industrial Technology, a forty-year educator, and the author or coauthor of more than 100 textbooks. Mark Richard Miller is a Professor and Chairman of the Industrial Technology Department at Texas A&M University in Kingsville, Texas.