Design of Rotating Electrical Machines, 2ed

Author : Juha Pyrhonen, Tapani Jokinen, Valeria Hrabovcova
ISBN 13 : 9788126565603
ISBN 10 : 8126565608
Pages : 612
Type : Paperbound
Remarks : Exclusively distributed by CBS Publishers & Distributors



This book is an in-depth essential reference of rotating electrical machine design theory and application.  In the first part of the book the general theory governing the design of an electrical machine is presented; addressing the necessary fundamentals of electromagnetic theory; exploring possible winding arrangements and resistances; describing the behaviour of the magnetic circuit and flux leakage.  After this introduction of principles the main body of the book focuses on the design of a rotating electrical machine. 


About the Authors

Abbreviations and Symbols


1 Principal Laws and Methods in Electrical Machine Design

1.1 Electromagnetic Principles  

1.2 Numerical Solution  

1.3 The Most Common Principles Applied to Analytic Calculation

1.4 Application of the Principle of Virtual Work in the Determination of Force and Torque

1.5 Maxwell's Stress Tensor; Radial and Tangential Stress

1.6 Self-Inductance and Mutual Inductance

1.7 Per Unit Values

1.8 Phasor Diagrams


2 Windings of Electrical Machines

2.1 Basic Principles

2.2 Phase Windings

2.3 Three-Phase Integral Slot Stator Winding

2.4 Voltage Phasor Diagram and Winding Factor

2.5 Winding Analysis

2.6 Short Pitching

2.7 Current Linkage of a Slot Winding

2.8 Poly-Phase Fractional Slot Windings

2.9 Phase Systems and Zones of Windings

2.10 Symmetry Conditions

2.11 Base Windings

2.12 Fractional Slot Windings

2.13 Single- and Double-Phase Windings

2.14 Windings Permitting a Varying Number of Poles

2.15 Commutator Windings

2.16 Compensating Windings and Commutating Poles

2.17 Rotor Windings of Asynchronous Machines

2.18 Damper Windings


3 Design of Magnetic Circuits

3.1 Air Gap and its Magnetic Voltage

3.2 Equivalent Core Length

3.3 Magnetic Voltage of a Tooth and a Salient Pole

3.4 Magnetic Voltage of Stator and Rotor Yokes

3.5 No-Load Curve, Equivalent Air Gap and Magnetizing Current of the Machine

3.6 Magnetic Materials of a Rotating Machine

3.7 Permanent Magnets in Rotating Machines

3.8 Assembly of Iron Stacks


4 Inductances

4.1 Magnetizing Inductance

4.2 Leakage Inductances

4.3 Calculation of Flux Leakage


5 Resistances

5.1 DC Resistance

5.2 Influence of Skin Effect on Resistance


6 Design Process of Rotating Electrical Machines

6.1 Eco-Design Principles of Rotating Electrical Machines

6.2 Design Process of a Rotating Electrical Machine


7 Properties of Rotating Electrical Machines

7.1 Machine Size, Speed, Different Loadings and Efficiency

7.2 Asynchronous Motor

7.3 Synchronous Machines

7.4 DC Machines

7.5 Doubly Salient Reluctance Machine


8 Insulation of Electrical Machines

8.1 Insulation of Rotating Electrical Machines

8.2 Impregnation Varnishes and Resins

8.3 Dimensioning of an Insulation

8.4 Electrical Reactions Ageing Insulation

8.5 Practical Insulation Constructions

8.6 Condition Monitoring of Insulation

8.7 Insulation in Frequency Converter Drives


9 Losses and Heat Transfer

9.1 Losses

9.2 Heat Removal

9.3 Thermal Equivalent Circuit



Appendix A

Appendix B


  • Practising engineers and researchers involved in electrical machine design. 
  • MSc and postgraduate students taking courses in electrical drives technology.


Juha Pyrhönen is currently a Professor of Electrical Drives Technology in the Department of Electrical Engineering at Lappeenranta University of Technology, Finland. He has been lecturing at the university since 1991 and has held the position of Dean of the Department of Electrical Engineering since 1998. Professor Pyrhönen has contributed to more than 150 scientific papers in conferences and journals.  He has also authored a large amount of teaching material in the field of electrical motors and drives, and magnetism. 


Tapani Jokinen is Professor Emeritus of the Laboratory of Electromechanics at Helsinki University of Technology, Finland.  His career has spanned both the industrial and academic domains.  He was a member of the International Conference on Electrical Machines (ICEM) board of directors for several years and arranged the ICEM2000 in Helsinki.


Valeria Hrabovcova is Professor and Vice-Dean at the Faculty of Electrical Engineering, University of Zilina, Slovakia. Professor Hrabovcova is an active participant in various projects of the European Commission, such as "Improvement of Educational Activities in Power Electronics and its Applications", under the framework of TEMPUS programme.