EE2302 ELECTRICAL MACHINES - II Lecture Notes for EEE - Fifth (5th) semester
EE2302 Lecture Notes
UNIT I 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.
UNIT II 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.
UNIT III THREE PHASE INDUCTION MOTOR
Constructional details – Types of rotors – Principle of operation – Slip – Equivalent circuit – Sliptorque
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.
UNIT IV STARTING AND SPEED CONTROL OF THREE PHASE INDUCTION
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.
UNIT V 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 - AC series motor.
To Get alert, like us in facebook or subscribe us and To find what you need very easy Click G+