Electrical Technology

Front Cover
Technical Publications, 2008 - 550 pages
D.C. MachinesPrinciple of operation of DC machines - EMF equation - Types of generators-Magnetization and load characteristics of DC generators.D.C. MotorsDC motors-Types of DC motors-Characteristics of DC motors-3-point starters for DC shunt motor-Losses and efficiency-Swinburne's test-Speed control of DC shunt motor-Flux and armature voltage control methods.TransformersPrinciple of operation of single phase transformer-Types-Constructional features-Phasor diagram on no load and load-Equivalent circuit.Performance of TransformersLosses and efficiency of transformer and regulation-OC and SC tests-Predetermination of efficiency and regulation (Simple problems).Three Phase Induction MotorPrinciple of operation three-phase induction motors-Slip ring and squirrel cage motors-Slip-Torque characteristics-Efficiency calculation-Starting methods.AlternatorsAlternators-Constructional features-Principle of operation-Types -EMF equation-Distribution and Coil span factors-Predetermination of regulation by synchronous impedance method-OC and SC tests.Single Phase Induction MotorsPrinciple of operation-Shaded pole motors-Capacitor motors, AC servomotor, AC tachometers, Synchros, Stepper motors-Characteristics.Electrical InstrumentsBasic principles of indicating instruments-Moving coil and moving iron instruments (Ammeters and Voltmeters).

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