Electrical Machines - Ii

Electrical Machines - Ii

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Synchronous Generator Constructional details - Types of rotors - emf equation - Synchronous reactance - Armature reaction - Voltage regulation - e.m.f., m.m.f., z.p.f. and A.S.A. methods - Synchronizing and parallel operation - Synchronizing torque - Change of excitation and mechanical input - Two reaction theory - Determination of direct and quadrature axis synchronous reactance using slip test - Operating characteristics - Capability curves.Synchronous Motor Principle of operation - Torque equation - Operation on infinite bus bars - V-curves - Power input and power developed equations - Starting methods - Current loci for constant power input, Constant excitation and constant power developed.Three Phase Induction MotorConstructional details - Types of rotors - Principle of operation - Slip - Equivalent circuit - Slip-torque characteristics - Condition for maximum torque - Losses and efficiency - Load test - No load and blocked rotor tests - Circle diagram - Separation no load losses - Double cage rotors - Induction generator - Synchronous induction motor.Starting and Speed Control of Three Phase Induction MotorNeed for starting - Types of starters - Stator resistance and reactance, Rotor resistance, Autotransformer and star-delta starters - Speed control - Change of voltage, Torque, Number of poles and slip - Cascaded connection - Slip power recovery scheme.Single Phase Induction Motors and Special MachinesConstructional details of single phase induction motor - Double revolving field theory and operation - Equivalent circuit - No load and blocked rotor test - Performance analysis - Starting methods of single-phase induction motors - Special machine - Shaded pole induction motor, reluctance motor, repulsion motor, hysteresis motor, stepper motor and A.C. series motor.Synchronous Generator Constructional details - Types of rotors - emf equation - Synchronous reactance - Armature reaction - Voltage regulation - e.m.f., m.m.f., z.p.f. and A.S.A. methods - Synchronizing and parallel operation - ...


Title:Electrical Machines - Ii
Author:M.V.Bakshi U.A.Bakshi
Publisher:Technical Publications - 2008-01-01
ISBN-13:

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