Design and Electromagnetic Feature Analysis of AC Rotating Machines (eBook)

Ahmed Masmoudi received the B.S degree from Sfax Engineering National School (SENS),University of Sfax, Sfax, Tunisia, in 1984, the Ph.D degree from Pierre and Marie CurieUniversity, Paris, France, in 1994, and the Research Management Ability degree from SENS,in 2001, all in electrical engineering. In August 1984, he joined Shlumberger as a fieldengineer. After this industrial experience, he joined the Tunisian University where he helddifferent positions involved in both education and research activities. He is currently aprofessor of electric power engineering at SENS, the head of the Research Laboratory onRenewable Energies and Electric Vehicles (RELEV) and the coordinator of the master onSustainable Mobility Actuators: Research and Technology. He published up to 85 journalpapers, 19 among which in IEEE transactions. He presented up 367 papers in internationalconferences, 9 among which in plenary sessions, and 3 have been rewarded by the bestpresented paper prize. He is the co-inventor of a USA patent. He is the chairman ofthe Program and Publication Committees of the International Conference on EcologicalVehicles and Renewable Energies (EVER), organized every year in Monte-Carlo, Monaco,since 2006. He was also the chairman of the Technical Program and Publication Committeesof the first International Conference on Sustainable Mobility Applications, Renewables, andTechnology (SMART) which has been held in Kuwait in November 2015. Its involvementin the above conferences has been marked by an intensive guest-editorship activity with thepublication of many special issues of several journals including the IEEE Transactions onMagnetics, COMPEL, ELECTROMOTION, and ETEP. Professor Masmoudi is a Seniormember, IEEE. His main interests include the design of new topologies of ac machines alliedto the implementation of advanced and efficient control strategies in drives and generators,applied to renewable energy as well as to electrical automotive systems.

Preface 6
Contents 8
About the Author 10
List of Figures 11
List of Tables 15
1 Air Gap Magnetomotive Force: Formulation and Analysis 16
1.1 Introduction 16
1.2 Formulation and Repartition of the Air Gap MMF Created by Concentrated Windings 17
1.2.1 Assumptions 17
1.2.2 Single Coil MMF Formulation 17
1.2.3 MMF Spatial Repartition 21
1.2.4 Case of a Dual Diametral Coil Winding 25
1.2.5 Case of a Multi Diametral Coil Winding 28
1.2.6 Three Phase Windings 29
1.3 Formulation and Repartition of the Air Gap MMF Created by Distributed Windings 35
1.3.1 Motivations in Using Distributed Windings 35
1.3.2 Case Study 35
1.4 Conclusion 45
2 Rotating Fields: Creation and Effects on the Machine Features 46
2.1 Introduction 46
2.2 Rotating Field Production 47
2.2.1 Case of a Single Phase Winding in the Rotor 47
2.2.2 Case of a Three Phase Winding 50
2.2.3 Case of a Two Phase Winding 52
2.2.4 Case of a Five Phase Winding 54
2.2.5 Generalisation 56
2.3 Back-EMF Induction 56
2.3.1 Case of a Concentrated Coil 57
2.3.2 Case of a Distributed Coil 58
2.3.3 Root-Mean-Square of the Induced Back-EMF 64
2.3.4 Case of a Distributed Winding 65
2.4 Developed Electromagnetic Torque 65
2.4.1 Torque Production in Smooth Pole AC Machines 66
2.4.2 Principle 66
2.4.3 Formulation 66
2.5 Conclusion 69
3 Fractional-Slot Concentrated Windings: Design and Analysis 70
3.1 Introduction 70
3.2 Concentrated Winding Arrangement Based on the Star of Slots Approach 73
3.2.1 Study Background 73
3.2.2 Basis of the Star of Slots 73
3.2.3 Arrangement of Double-Layer Concentrated Windings 74
3.2.4 Arrangement of Single-Layer Concentrated Windings 82
3.3 Winding Factor Star of Slots Based-Prediction 84
3.3.1 Winding Factor of the Fundamental Back-EMF 85
3.3.2 Winding Factor of the Harmonic Back-EMFs 87
3.4 MMF Formulation and Analysis: A Case Study 92
3.4.1 Double-Layer Topology 92
3.4.2 Single-Layer Topology 96
3.4.3 Double- Versus Single-Layer Topologies 98
3.5 Conclusion 99
References 100