Electrical Machines 2
Synchronous Generator Constructional details - Types of rotors - emf equation - Synchronous reactance - Armature reaction - Voltage regulation - EMF, MMF, ZPF 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 Motor Constructional 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 of no load losses - Double cage rotors - Induction generator - Synchronous induction motor. Starting and Speed Control of Three Phase Induction Motor Need for starting - Types of starters - 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 Machines Constructional 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 - Shaded pole induction motor - Linear reluctance motor - Repulsion motor - Hysteresis motor - A.C. series motor.
Author : U.A.Bakshi,M.V.Bakshi
Language : English
Publisher : Technical Publications
ISBN : 9789350990629
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