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Flux and Voltage Induction Machines 6.1 Description 6.2 Concept of Operation 6.3 Torque Development 6.4 Operation of the Induction Machine near Synchronous Speed 6.5 Leakage Inductances and their Effects 6.6 Operating characteristics 6.7 Starting of Induction Motors 6.8 Multiple pole pairs Synchronous Machines and Drives 7.1 Design and Principle of Operation 7.1.1 Wound Rotor Carrying DC 7.1.2 Permanent Magnet Rotor 7.2 Equivalent Circuit 7.3 Operation of the Machine Connected to a Bus of Constant Voltage and Frequency 7.4 Operation from a Source of Variable Frequency and Voltage. | Notes for an Introductory Course On Electrical Machines and Drives E.G.Strangas MSU Electrical Machines and Drives Laboratory Contents Preface ix 1 Three Phase Circuits and Power 1 1.1 Electric Power with steady state sinusoidal quantities 1 1.2 Solving 1-phase problems 5 1.3 Three-phase Balanced Systems 6 1.4 Calculations in three-phase systems 9 2 Magnetics 15 2.1 Introduction 15 2.2 The Governing Equations 15 2.3 Saturation and Hysteresis 19 2.4 Permanent Magnets 21 2.5 Faraday s Law 22 2.6 Eddy Currents and Eddy Current Losses 25 2.7 Torque and Force 27 3 Transformers 29 3.1 Description 29 3.2 The Ideal Transformer 30 3.3 Equivalent Circuit 32 3.4 Losses and Ratings 36 3.5 Per-unit System 37