Electrical Machines - Ii
Technical Publications, Jan 1, 2008 - 646 pages
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.
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Chapter2 Methods for Calculating Regulation of Alternator 2 1 to 2
Chapter3 Synchronization and Parallel Operation of Alternators 3 1 to 3
Alternators 1 1 to 1
Chapter5 Three Phase Induction Motors 51 to 5 118
Chapter9 Special Machines 91 to 942
Chapter6 Circle Diagram 6 1 to 6
ing and Speed Control of Induction Motor
hapter8 Single Phase Induction Motors 81 to 8 30
AppendixA Electric Braking of an Induction Motor A 1 to A
Other editions - View all
0.8 lagging a.c. supply air gap angle armature current armature reaction armature resistance autotransformer axis bus bar Calculate circle diagram coil component conductors constant delta connected Ebph Eiph Electrical Machines equation equivalent circuit excitation field current flux frequency full load current harmonic Hence Iaph induced e.m.f. Key Point leakage reactance load condition maximum torque mechanical losses method number of poles open circuit Operation of Alternators output p.f. lagging phase induction motor phasor diagram power factor Refer section Regulation of Alternator resistance per phase rheostat rotating magnetic field rotor copper losses rotor current Rotor input rotor resistance running condition short circuit slip ring slots Solution squirrel cage Squirrel cage rotor standstill star connected alternator starter starting torque stator stator and rotor stator losses stator winding stepper motor synchronizing power synchronous motor synchronous reactance synchronous speed terminal voltage three phase induction voltage regulation volts zero