Design of Rotating Electrical Machines

Inbunden, Engelska, 2013

1 368 kr

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Beskrivning

In one complete volume, this essential reference presents an in-depth overview of the theoretical principles and techniques of electrical machine design. This timely new edition offers up-to-date theory and guidelines for the design of electrical machines, taking into account recent advances in permanent magnet machines as well as synchronous reluctance machines.New coverage includes: Brand new material on the ecological impact of the motors, covering the eco-design principles of rotating electrical machinesAn expanded section on the design of permanent magnet synchronous machines, now reporting on the design of tooth-coil, high-torque permanent magnet machines and their propertiesLarge updates and new material on synchronous reluctance machines, air-gap inductance, losses in and resistivity of permanent magnets (PM), operating point of loaded PM circuit, PM machine design, and minimizing the losses in electrical machines>End-of-chapter exercises and new direct design examples with methods and solutions to real design problems>A supplementary website hosts two machine design examples created with MATHCAD: rotor surface magnet permanent magnet machine and squirrel cage induction machine calculations. Also a MATLAB code for optimizing the design of an induction motor is providedOutlining a step-by-step sequence of machine design, this book enables electrical machine designers to design rotating electrical machines. With a thorough treatment of all existing and emerging technologies in the field, it is a useful manual for professionals working in the diagnosis of electrical machines and drives. A rigorous introduction to the theoretical principles and techniques makes the book invaluable to senior electrical engineering students, postgraduates, researchers and university lecturers involved in electrical drives technology and electromechanical energy conversion.

Produktinformation

Utgivningsdatum:2013-11-29
Mått:178 x 252 x 34 mm
Vikt:1 071 g
Format:Inbunden
Språk:Engelska
Antal sidor:616
Upplaga:2
Förlag:John Wiley & Sons Inc
ISBN:9781118581575

Utforska kategorier

Mer om författaren

Juha Pyrhönen Lappeenranta University of Technology, FinlandTapani Jokinen Aalto University, School of Electrical Engineering, FinlandValéria Hrabovcová University of ?ilina, Slovakia

Recensioner i media

“The insight gained by this book will provide the reader with an advantage in understanding the inner workings of motors and to be able to optimize designs for maximum efficiency.” (IEEE Electrical Insulation Magazine, 1 November 2014)

Innehållsförteckning

Preface xi About the Authors xiiiAbbreviations and Symbols xv1 Principal Laws and Methods in Electrical Machine Design 11.1 Electromagnetic Principles 11.2 Numerical Solution 81.3 The Most Common Principles Applied to Analytic Calculation 121.3.1 Flux Line Diagrams 161.3.2 Flux Diagrams for Current-Carrying Areas 221.4 Application of the Principle of Virtual Work in the Determination of Force and Torque 251.5 Maxwell’s Stress Tensor; Radial and Tangential Stress 321.6 Self-Inductance and Mutual Inductance 361.7 Per Unit Values 421.8 Phasor Diagrams 45Bibliography 472 Windings of Electrical Machines 482.1 Basic Principles 492.1.1 Salient-Pole Windings 492.1.2 Slot Windings 532.1.3 End Windings 542.2 Phase Windings 542.3 Three-Phase Integral Slot Stator Winding 572.4 Voltage Phasor Diagram and Winding Factor 642.5 Winding Analysis 722.6 Short Pitching 742.7 Current Linkage of a Slot Winding 812.8 Poly-Phase Fractional Slot Windings 942.9 Phase Systems and Zones of Windings 972.9.1 Phase Systems 972.9.2 Zones of Windings 992.10 Symmetry Conditions 1012.10.1 Symmetrical Fractional Slot Windings 1012.11 Base Windings 1042.11.1 First-Grade Fractional Slot Base Windings 1042.11.2 Second-Grade Fractional Slot Base Windings 1052.11.3 Integral Slot Base Windings 1062.12 Fractional Slot Windings 1082.12.1 Single-Layer Fractional Slot Windings 1082.12.2 Double-Layer Fractional Slot Windings 1172.13 Single- and Double-Phase Windings 1242.14 Windings Permitting a Varying Number of Poles 1272.15 Commutator Windings 1292.15.1 Lap Winding Principles 1332.15.2 Wave Winding Principles 1362.15.3 Commutator Winding Examples, Balancing Connectors 1392.15.4 AC Commutator Windings 1432.15.5 Current Linkage of the Commutator Winding and Armature Reaction 1442.16 Compensating Windings and Commutating Poles 1462.17 Rotor Windings of Asynchronous Machines 1492.18 Damper Windings 152Bibliography 1533 Design of Magnetic Circuits 1553.1 Air Gap and its Magnetic Voltage 1613.1.1 Air Gap and Carter Factor 1613.1.2 Air Gaps of a Salient-Pole Machine 1663.1.3 Air Gap of Nonsalient-Pole Machine 1723.2 Equivalent Core Length 1733.3 Magnetic Voltage of a Tooth and a Salient Pole 1763.3.1 Magnetic Voltage of a Tooth 1763.3.2 Magnetic Voltage of a Salient Pole 1803.4 Magnetic Voltage of Stator and Rotor Yokes 1803.5 No-Load Curve, Equivalent Air Gap and Magnetizing Current of the Machine 1833.6 Magnetic Materials of a Rotating Machine 1863.6.1 Characteristics of Ferromagnetic Materials 1893.6.2 Losses in Iron Circuits 1943.7 Permanent Magnets in Rotating Machines 2033.7.1 History and Development of Permanent Magnets 2033.7.2 Characteristics of Permanent Magnet Materials 2053.7.3 Operating Point of a Permanent Magnet Circuit 2103.7.4 Demagnetization of Permanent Magnets 2173.7.5 Application of Permanent Magnets in Electrical Machines 2193.8 Assembly of Iron Stacks 226Bibliography 2274 Inductances 2294.1 Magnetizing Inductance 2304.2 Leakage Inductances 2334.2.1 Division of Leakage Flux Components 2354.3 Calculation of Flux Leakage 2384.3.1 Skewing Factor and Skew Leakage Inductance 2394.3.2 Air-Gap Leakage Inductance 2434.3.3 Slot Leakage Inductance 2484.3.4 Tooth Tip Leakage Inductance 2594.3.5 End Winding Leakage Inductance 260Bibliography 2645 Resistances 2655.1 DC Resistance 2655.2 Influence of Skin Effect on Resistance 2665.2.1 Analytical Calculation of Resistance Factor 2665.2.2 Critical Conductor Height in Slot 2765.2.3 Methods to Limit the Skin Effect 2775.2.4 Inductance Factor 2785.2.5 Calculation of Skin Effect in Slots Using Circuit Analysis 2795.2.6 Double-Sided Skin Effect 287Bibliography 2926 Design Process of Rotating Electrical Machines 2936.1 Eco-Design Principles of Rotating Electrical Machines 2936.2 Design Process of a Rotating Electrical Machine 2946.2.1 Starting Values 2946.2.2 Main Dimensions 2976.2.3 Air Gap 3056.2.4 Winding Selection 3096.2.5 Air-Gap Flux Density 3106.2.6 The No-Load Flux of an Electrical Machine and the Number of Winding Turns 3116.2.7 New Air-Gap Flux Density 3166.2.8 Determination of Tooth Width 3176.2.9 Determination of Slot Dimensions 3186.2.10 Determination of the Magnetic Voltages of the Air Gap, and the Stator and Rotor Teeth 3236.2.11 Determination of New Saturation Factor 3266.2.12 Determination of Stator and Rotor Yoke Heights and Magnetic Voltages 3266.2.13 Magnetizing Winding 3276.2.14 Determination of Stator Outer and Rotor Inner Diameter 3296.2.15 Calculation of Machine Characteristics 329Bibliography 3307 Properties of Rotating Electrical Machines 3317.1 Machine Size, Speed, Different Loadings and Efficiency 3317.1.1 Machine Size and Speed 3317.1.2 Mechanical Loadability 3337.1.3 Electrical Loadability 3377.1.4 Magnetic Loadability 3387.1.5 Efficiency 3407.2 Asynchronous Motor 3427.2.1 Current Linkage and Torque Production of an Asynchronous Machine 3427.2.2 Impedance and Current Linkage of a Cage Winding 3497.2.3 Characteristics of an Induction Machine 3567.2.4 Equivalent Circuit Taking Asynchronous Torques and Harmonics into Account 3617.2.5 Synchronous Torques 3677.2.6 Selection of the Slot Number of a Cage Winding 3697.2.7 Construction of an Induction Motor 3717.2.8 Cooling and Duty Types 3737.2.9 Examples of the Parameters of Three-Phase Industrial Induction Motors 3787.2.10 Asynchronous Generator 3807.2.11 Wound Rotor Induction Machine 3827.2.12 Asynchronous Motor Supplied with Single-Phase Current 3837.3 Synchronous Machines 3887.3.1 Inductances of a Synchronous Machine in Synchronous Operation and in Transients 3907.3.2 Loaded Synchronous Machine and Load Angle Equation 4007.3.3 RMS Value Phasor Diagrams of a Synchronous Machine 4077.3.4 No-Load Curve and Short-Circuit Test 4177.3.5 Asynchronous Drive 4197.3.6 Asymmetric-Load-Caused Damper Currents 4237.3.7 Shift of Damper Bar Slotting from the Symmetry Axis of the Pole 4247.3.8 V Curve of a Synchronous Machine 4267.3.9 Excitation Methods of a Synchronous Machine 4267.3.10 Permanent Magnet Synchronous Machines 4277.3.11 Synchronous Reluctance Machines 4567.4 DC Machines 4687.4.1 Configuration of DC Machines 4687.4.2 Operation and Voltage of a DC Machine 4707.4.3 Armature Reaction of a DC machine and Machine Design 4747.4.4 Commutation 4757.5 Doubly Salient Reluctance Machine 4797.5.1 Operating Principle of a Doubly Salient Reluctance Machine 4797.5.2 Torque of an SR Machine 4807.5.3 Operation of an SR Machine 4817.5.4 Basic Terminology, Phase Number and Dimensioning of an SR Machine 4857.5.5 Control Systems of an SR Motor 4897.5.6 Future Scenarios for SR Machines 491Bibliography 4928 Insulation of Electrical Machines 4958.1 Insulation of Rotating Electrical Machines 4978.2 Impregnation Varnishes and Resins 5038.3 Dimensioning of an Insulation 5068.4 Electrical Reactions Ageing Insulation 5098.5 Practical Insulation Constructions 5108.5.1 Slot Insulations of Low-Voltage Machines 5118.5.2 Coil End Insulations of Low-Voltage Machines 5128.5.3 Pole Winding Insulations 5128.5.4 Low-Voltage Machine Impregnation 5138.5.5 Insulation of High-Voltage Machines 5138.6 Condition Monitoring of Insulation 5158.7 Insulation in Frequency Converter Drives 518Bibliography 5219 Losses and Heat Transfer 5239.1 Losses 5249.1.1 Resistive Losses 5249.1.2 Iron Losses 5269.1.3 Additional Losses 5269.1.4 Mechanical Losses 5279.1.5 Decreasing Losses 5299.1.6 Economics of Energy Savings 5339.2 Heat Removal 5349.2.1 Conduction 5349.2.2 Radiation 5389.2.3 Convection 5419.3 Thermal Equivalent Circuit 5489.3.1 Analogy between Electrical and Thermal Quantities 5489.3.2 Average Thermal Conductivity of a Winding 5499.3.3 Thermal Equivalent Circuit of an Electrical Machine 5509.3.4 Modeling of Coolant Flow 5609.3.5 Solution of Equivalent Circuit 5659.3.6 Cooling Flow Rate 568Bibliography 568Appendix A 570Appendix B 572Index 575