You are previewing Electric Motors and Drives.
O'Reilly logo
Electric Motors and Drives

Book Description

Electric Motors and Drives is intended for non-specialist users of electric motors and drives, filling the gap between maths- and theory-based academic textbooks and the more prosaic 'handbooks', which provide useful detail but little opportunity for the development of real insight and understanding. The book explores all of the widely-used modern types of motor and drive, including conventional and brushless D.C., induction motors and servo drives, providing readers with the knowledge to select the right technology for a given job.

The third edition includes additional diagrams and worked examples throughout. New topics include digital interfacing and control of drives, direct torque control of induction motors and current-fed operation in DC drives. The material on brushless servomotors has also been expanded.

Austin Hughes' approach, using a minimum of maths, has established Electric Motors and Drives as a leading guide for electrical engineers and mechanical engineers, and the key to a complex subject for a wider readership, including technicians, managers and students.

* Acquire essential practical knowledge of motors and drives, with a minimum of maths and theory
* Updated material on the latest and most widely-used modern motors and drives
* New edition includes additional diagrams and worked examples throughout

Table of Contents

  1. Cover image
  2. Title page
  3. Table of Contents
  4. Copyright
  5. Preface
  6. Chapter One. Electric Motors – The Basics
    1. 1. Introduction
    2. 2. Producing Rotation
    3. 3. Magnetic Circuits
    4. 4. Torque Production
    5. 5. Torque and Motor Volume
    6. 6. Energy Conversion – Motional E.M.F.
    7. 7. Equivalent Circuit
    8. 8. Constant Voltage Operation
    9. 9. General Properties of Electric Motors
  7. Chapter Two. Introduction to Power Electronic Converters for Motor Drives
    1. 1. Introduction
    2. 2. Voltage Control – D.C. Output from D.C. Supply
    3. 3. D.C. from A.C. – Controlled Rectification
    4. 4. A.C. from D.C. – Inversion
    5. 5. A.C. from A.C.
    6. 6. Inverter Switching Devices
    7. 7. Converter Waveforms, Acoustic Noise, and Cooling
  8. Chapter Three. Conventional D.C. Motors
    1. 1. Introduction
    2. 2. Torque Production
    3. 3. Motional E.M.F.
    4. 4. D.C. Motor – Steady-State Characteristics
    5. 5. Transient Behavior – Current Surges
    6. 6. Four Quadrant Operation and Regenerative Braking
    7. 7. Shunt and Series Motors
    8. 8. Self-Excited D.C. Machine
    9. 9. Toy Motors
  9. Chapter Four. D.C. Motor Drives
    1. 1. Introduction
    2. 2. Thyristor D.C. Drives – General
    3. 3. Control Arrangements for D.C. Drives
    4. 4. Chopper-Fed D.C. Motor Drives
    5. 5. D.C. Servo Drives
    6. 6. Digitally Controlled Drives
  10. Chapter Five. Induction Motors – Rotating Field, Slip and Torque
    1. 1. Introduction
    2. 2. The Rotating Magnetic Field
    3. 3. Torque Production
    4. 4. Influence of Rotor Current on Flux
    5. 5. Stator Current–Speed Characteristics
  11. Chapter Six. Induction Motors – Operation from 50/60Hz Supply
    1. 1. Introduction
    2. 2. Methods of Starting Cage Motors
    3. 3. Run-Up and Stable Operating Regions
    4. 4. Torque–Speed Curves – Influence of Rotor Parameters
    5. 5. Influence of Supply Voltage on Torque–Speed Curve
    6. 6. Generating
    7. 7. Braking
    8. 8. Speed Control
    9. 9. Power-Factor Control and Energy Optimization
    10. 10. Single-Phase Induction Motors
    11. 11. Power Range
  12. Chapter Seven. Variable Frequency Operation of Induction Motors
    1. 1. Introduction
    2. 2. Inverter-Fed Induction Motor Drives
    3. 3. Torque–Speed Characteristics
    4. 4. Introduction to Field-Oriented Control
    5. 5. Steady-State Torque Under Current-Fed Conditions
    6. 6. Torque vs Slip Frequency – Constant Rotor Flux Linkage
    7. 7. Dynamic Torque Control
    8. 8. Implementation of Field-Oriented Control
    9. 9. Direct Torque Control
  13. Chapter Eight. Inverter-fed Induction Motor Drives
    1. 1. Introduction
    2. 2. Pulse-Width Modulated (PWM) Voltage Source Inverter (VSI)
    3. 3. Performance of Inverter-Fed Induction Motor Drives
    4. 4. Effect of Inverter Waveform and Variable Speed on the Induction Motor
    5. 5. Effect of the Inverter-Fed Induction Motor on the Utility Supply
    6. 6. Inverter and Motor Protection
    7. 7. Alternative Converter Topologies
  14. Chapter Nine. Synchronous and Brushless Permanent Magnet Machines and Drives
    1. 1. Introduction
    2. 2. Synchronous Motors
    3. 3. Equivalent Circuits of Synchronous Motors
    4. 4. Operation From Constant-Voltage, Constant-Frequency (Utility) Supply
    5. 5. Variable-Frequency Operation
    6. 6. Synchronous Motor Drives
    7. 7. Performance of Brushless Motors
    8. 8. Reluctance and Hysteresis Motors
  15. Chapter Ten. Stepping and Switched-reluctance Motors
    1. 1. Introduction
    2. 2. Stepping Motors
    3. 3. Principle of Motor Operation
    4. 4. Motor Characteristics
    5. 5. Steady-State Characteristics – Ideal (Constant-Current) Drive
    6. 6. Drive Circuits and Pull-Out Torque–Speed Curves
    7. 7. Transient Performance
    8. 8. Switched-Reluctance Motor Drives
  16. Chapter Eleven. Motor/Drive Selection
    1. 1. Introduction
    2. 2. Power Ratings and Capabilities
    3. 3. Drive Characteristics
    4. 4. Load Requirements – Torque–Speed Characteristics
    5. 5. General Application Considerations
  17. Appendix One. Introduction to Closed-loop Control
    1. A1.1. Outline of Approach
    2. A1.2. Closed-Loop (Feedback) Systems
    3. A1.3. Steady-State Analysis of Closed-Loop Systems
  18. Appendix Two. Induction Motor Equivalent Circuit
    1. A2.1. Introduction
    2. A2.2. The Ideal Transformer
    3. A2.3. The Real Transformer
    4. A2.4. Development of the Induction Motor Equivalent Circuit
    5. A2.5. Properties of Induction Motors
    6. A2.6. Performance Prediction – Example
    7. A2.7. Approximate Equivalent Circuits
    8. A2.8. Measurement of Induction Motor Parameters
    9. A2.9. Equivalent Circuit Under Variable-Frequency Conditions
  19. Further Reading
  20. Index
  21. Color Plates