Linear Electric Actuators and Generators

Author： I. Boldea; Syed A. Nasar  

Publisher： Cambridge University Press‎

Publication year： 1997

E-ISBN: 9780511887185

P-ISBN(Paperback): 9780521480178

Subject： TM3 motor

Keyword： 电工技术

Language： ENG

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Linear Electric Actuators and Generators

Description

Linear electric actuators (LEAs) and linear electric generators (LEGs) are widely used electromagnetic devices. This book deals with LEAs that convert electric energy into controlled mechanical motion of limited travel and LEGs that transform mechanical energy into electric energy. Examples range from loudspeakers and microphones to magnetically levitated material transfer in ultraclean rooms. Much of the literature on linear actuators and generators covers the principles of operation and performance calculations of these devices. Little has been published on their control or on detailed design methodologies. This book presents the first unified treatment of the subject, including the construction, operation, control and design of LEAs and LEGs. Chapters describe linear induction, permanent-magnet, linear reluctance, switched reluctance, and linear stepper actuators, as well as various types of linear electric generators. The text is amply illustrated with numerous design examples.

Chapter

Cover

Half-title

Title

Copyright

Contents

Preface

Chapter 1 Magnetic Circuits, Fields, and Forces

1.1 A Review of Electromagnetic Field Theory

1.2 Magnetic Materials

1.3 Magnetic Losses

1.4 Magnetic Circuits

1.5 Ampere's Law Applied to a Magnetic Circuit

1.6 Limitations of the Magnetic Circuit Approach

1.7 Energy Relations in a Magnetic Field

1.8 Inductance

1.9 Magnetic Circuits Containing Permanent Magnets

1.10 Forces of Electromagnetic Origin

1.11 The Force Equation

References

Chapter 2 Introduction to Linear Electric Actuators and Generators

2.1 Terminology

2.2 Operation of LEAs

2.3 Operation of LEGs

2.4 Existing and Potential Applications

References

Chapter 3 Linear Induction Actuators

3.1 Performance Specifications

3.2 Construction Details for Flat and Tubular Geometries

3.3 Field Distributions

3.4 Lumped Parameter Representation

3.5 Steady-State Characteristics

3.6 State-Space Equations

3.7 Vector Control Aspects

3.8 Design Methodology by Example

References

Chapter 4 Linear Permanent Magnet Synchronous Actuators

4.1 Construction Details

4.2 Fields in LPMSAs

4.3 Sinusoidal Current Model Field Distribution

4.4 The dg-Model and Forces

4.5 Rectangular Current Mode

4.6 Dynamics and Control Aspects

4.7 Design Methodology

References

Chapter 5 Linear Reluctance Synchronous Actuators

5.1 Practical Configurations and Saliency Coefficients

5.2 Field Distributions and Saliency Ratio

5.3 Mathematical Model

5.4 Steady-State Characteristics

5.5 Vector Control Aspects

5.6 Design Methodology

References

Chapter 6 Linear Switched Reluctance Actuators

6.1 Practical Configurations

6.2 Instantaneous Thrust

6.3 Average Thrust

6.4 Converter Rating

6.5 State-Space Equations

6.6 Control Aspects

6.7 Design Methodology

References

Chapter 7 Linear Stepper Actuators

7.1 Practical Configurations and Their Operation

7.2 Static Forces

7.3 Lumped Parameter Models

7.4 Control Aspects

7.5 LSA Design Guidelines

References

Chapter 8 Linear Electric Generators

8.1 Principle of Operation and Basic Configurations

8.2 Moving Magnet Linear Alternators

8.3 Moving Iron Linear Alternators

8.4 Stability Considerations

8.5 Choice of Tuning Capacitor

References

Index

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