Principles Of Electric Machines With Power Electronic Applications, Second Edition

A thoroughly updated introduction to electric machines and adjustable speed drives

All machines have power requirements, and finding the right balance of economy and performance can be a challenge to engineers. Principles of Electric Machines with Power Electronic Applications provides a thorough grounding in the principles of electric machines and the closely related area of power electronics and adjustable speed drives. Designed for both students and professionals seeking a foundation in the fundamental structure of modern-day electric power systems from a technical perspective, this lucid, succinct guide has been completely revised and updated to cover:
* The fundamental underpinnings of electromechanical energy conversion devices
* Transformers
* Induction machines
* Synchronous machines
* DC machines
* Power electronic components, systems, and their applications to adjustable speed drives


Enhanced by numerous solved problems, sample examinations and test sets, and computer-based solutions assisted by MATLAB scripts, this new edition of Principles of Electric Machines with Power Electronic Applications serves equally well as a practical reference and a handy self-study guide to help engineers maintain their professional edge in this essential field.

MOHAMED E. EL-HAWARY received a bachelor of engineering degree in electrical engineering from the University of Alexandria in Egypt and a PhD in electrical engineering from the University of Alberta, Canada. He is currently Associate Dean of Engineering at DalTech of Dalhousie University. Dr. El-Hawary is a Fellow of both the IEEE and the Engineering Institute of Canada.

Preface.

Chapter 1: Introduction.

Electric Machines.

Roots in Observation.

Beginnings.

Foundations of Electromagnetism.

The Dawn of Electrodynamics.

Early Electric Generators.

Early Electric Motors.

Alternating Current.

Power Electronics: Scope and A Brief History.

Structure of the Power System.

Outline of the Text.

Chapter 2: Principles of Electromagnetism and Electromechanical Energy Conversion.

Magnetic-Field Laws.

Permeability and Magnetic-Field Intensity.

Magnetic Circuits.

Flux Linkages, Induced Voltages, Inductance, and Energy.

Hysteresis Loop.

Eddy-Current and Core Losses.

Energy Flow Approach.

Field Energy.

Multiply Excited Systems.

Reluctance Motors.

Doubly Excited Systems.

Salient-Pole Machines.

Round or Smooth Air-Gap Machines.

Machine-Type Classification.

P-Pole Machines.

Chapter 3: Power Electronic Devices and Systems.

Power Semiconductor Devices.

Control Characteristics of Power Devices.

Power Transistors.

The Thyristors.

Power Electronic Systems.

Power Integrated Circuits and Smart Power.

Chapter 4: Direct-Current Motors.

Construction Features.

Circuit Model of dc Generator.

Circuit Model of dc Motors.

dc Series Motors.

dc Shunt Motors.

Motor and Load Matching.

Conventional Speed Control of dc Motors.

Reversal of Direction of Rotation.

Starting dc Motors.

Adjustable Speed dc Motor Drives.

ac-dc Drives for dc Motors.

dc-dc Drives for dc Motors.

Chapter 5: Transformers.

Ideal Transformers.

Transformer Models.

Transformer Performance Measures.

Single-Phase Connections.

Three-Winding Transformers.

Three-Phase Systems and Transformer Connections.

Autotransformers.

Chapter 6: Induction Motors and Their Control.

MMF Waves and the Rotating Magnetic Field.

Slip.

Equivalent Circuits.

Simplified Equivalent Circuits.

Torque Characteristics.

Some Useful Relations.

Internal Mechanical Power.

Effects of Rotor Impedance.

Classification of Induction Motors.

Starting Induction Motors.

Conventional Speed Control of Induction Motors.

Adjustable Speed Drives: General Considerations.

Variable-Voltage - Constant-Frequency Drives.

Variable-Voltage - Variable-Frequency Drives.

dc-Link-Converter Drives.

Voltage-Fed Inverter Drives.

Current-Fed Inverter Drives.

Cycloconverter Drives.

Regulation of Slip Power.

Chapter 7: Synchronous Machines.

Round-Rotor Machines: Equivalent Circuit.

Armature Reaction.

Principal Steady-State Characteristics.

Power Angle Characteristics and the Infinite-Bus Concept.

Synchronous-Motor Operation.

Salient-Pole Machines.

Chapter 8: Fractional-Horsepower Alternating Current Motors.

Rotating Magnetic Fields in Single-Phase Induction Motors.

Equivalent Circuits for Single-Phase Induction Motors.

Power and Torque Relations.

Starting Single-Phase Induction Motors.

Bibliography.

Index.