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Contents Preface Acknowledgments xiii xvii Review of Electric Circuit Theory 1 1.1 1.2 1.3 1.4 1.5 Introduction Direct-Current Circuit Analysis Alternating-Current Circuit Analysis Three-Phase Circuits Power and Impedance Measurements Summary Review Questions Problems 2 3 7 20 29 52 53 55 Review of Basic Laws of Electromagnetism 63 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 Introduction Maxwell’s Equations Magnetic Materials and Their Properties Magnetic Circuits Self and Mutual Inductances
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  Contents PrefaceAcknowledgments xiii xvii Review of Electric Circuit Theory 1  1.1 Introduction 1.2 Direct-Current Circuit Analysis 1.3 Alternating-Current Circuit Analysis 1.4 Three-Phase Circuits 1.5 Power and Impedance MeasurementsSummaryReview QuestionsProblems 2 3 7 20 29 5253 55 Review of Basic Laws of Electromagnetism 63  2.12.2 2.3 2.4 2.5 2.6 2.7 2.8 IntroductionMaxwell’s EquationsMagnetic Materials and Their PropertiesMagnetic CircuitsSelf and Mutual InductancesMagnetically Coupled CoilsMagnetic LossesPermanent Magnets 6464 7583 97  104109115 vii  viii Contents SummaryReview QuestionsProblems 122 124 126  Principles of Electromechanical Energy Conversion 138  3.13.23.33.43.53.63.7 3.8 IntroductionElectric Field as a MediumMagnetic Field as a Medium A Coil in a Uniform Magnetic Field A Coil in a Time-Varying Magnetic FieldSynchronous MotorReluctance MotorElectromagnetic RelaysSummaryReview QuestionsProblems 139 1 40146  156  170 181182186 190  193 194  Transformers 202  4.14.24.34.44.54.64.74.84.94.104.1 1 4.12 IntroductionConstruction of a Transformer An Ideal Transformer A Nonideal TransformerVoltage RegulationMaximum Efficiency CriterionDetermination of Transformer ParametersPer-Unit ComputationsThe AutotransformerThree-Phase TransformersThe Constant-Current TransformerInstrument TransformersSummaryReview QuestionsProblems 203204205213 225 228 232 239 244 253268  2 70273 276277  Contents ix Direct-Current Generators 284  5.15.25.35.45.55.65.75.85.95.105.115.125.135.145.155.16 IntroductionMechanical ConstructionArmature WindingsInduced emf EquationDeveloped TorqueMagnetization Characteristic of aDCMachineTheory of CommutationArmature Reaction Types of DC GeneratorsVoltage RegulationLosses in DC Machines A Separately Excited DC Generator A Shunt Generator A Series GeneratorCompound GeneratorsMaximum Efficiency CriterionSummary Review Questions Pro hlems 285285289299303305307310314315 31 631932333033233834 1  342 344 Direct-Current Motors 351 6.1 6.26.36.46.56.6 6.7 6.86.96.106.11 IntroductionOperation of a DC MotorSpeedRegulationLosses in a DC Motor A Series Motor A Shunt MotorThe Compound MotorMethods of Speed Control The Ward-Leonard SystemTorque MeasuremenuBraking or Keversing DC Motors 352352356356356362368372379382386  X Contents SummaryReview QuestionsProblems 392393395 Synchronous Generators 7.1 7.2 7.3 7.47.57.6 7.7 7.87.97.107.1 1 7.127.13 IntroductionConstruction of a Synchronous MachineArmature WindingsPitch FactorDistribution FactorWinding ConnectionsInduced emf EquationThe Equivalent CircuitPower RelationshipsSynchronous Generator TestsThe External CharacteristicSalient-Pole Synchronous GeneratorParallel Operation of Synchronous GeneratorsSummaryReview QuestionsProblems 403 404 40540941 2414418422429434440445452460463464 Synchronous Motors 470 8.1 Introduction 8.28.38.4 Power Expressions 8.58.6 Effect of Excitation 8.7 Power Factor CorrectionSummaryReview QuestionsProblemsConstruction and Operation of a Synchronous MotorEquivalent Circuit of a Synchronous MotorExact Condition for Maximum Power 471 471 475482493498501502504489
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