(½Ì²Ä)Electric Machineryµç»úѧ(Ó¢ººË«Óï)

Preface Chapter 0 Introduction 1 0.1 The role of electrical machines in our lives 1 0.2 Types of electrical machines 2 0.3 Materials used in internal structure of electrical machines 2 0.4 Magnetic circuits 3 0.4.1 Magnetic fields 3 0.4.2 Magnetic circuits 5 0.4.3 Magnetic behaviors of ferromagnetic materials 10 0.4.4 Energy losses in a ferromagnetic core 10 0.5 R elated laws 13 0.5.1 Faraday's law of electromagnetic induction 13 0.5.2 Production of induction force on a wire 14 Chapter 1 Direct-Current Machines 15 1.1 Introduction to DC machines 15 1.1.1 Construction of DC machines 15 1.1.2 Principles of DC generators 18 1.1.3 Principles of DC motors 19 1.1.4 The excitation of DC machines 19 1.1.5 The ratings of DC machines 20 1.2 Armature windings 21 1.2.1 Simplex lap windings 23 1.2.2 Simplex wave windings 25 1.3 Magnetic fields of DC machines 26 1.3.1 Magnetic field in no-load condition 27 1.3.2 Magnetic field in loaded condition 27 1.4 Induced voltage and electromagnetic torque 31 1.4.1 Induced voltage 31 1.4.2 Electromagnetic torque 32 1.5 Equivalent circuits of DC machines 34 1.5.1 Equivalent circuits of DC generators 34 1.5.2 Equivalent circuits of DC motors 36 ¡­¡­