Continuous Evaluation(Quiz – V) Syllabus for Subject: Design of AC Machines[ subject code : 2170909] |
(1)DESIGN OF THREE PHASE
INDUCTION MOTOR:
ROTOR DESIGN:
A. Squirrel cage rotor – Selection of no. of rotor slots, Effect of harmonics and choice of rotor slots to minimize harmonics, vibration, noise and voltage ripples, Rules for selecting no. of rotor slots, Methods for reducing harmonic torque, Design of rotor bars and rotor slots. Design of end rings and rotor core.
B. Wound rotor - Calculation of number of rotor slots, Number of turns, Cross
sectional
area of rotor conductors, Types of rotor windings, Check for rotor tooth
density, Design of rotor slot and rotor core.
PERFORMANCE PARAMETERS EVALUATION:
No
load current calculation, Stator and rotor resistance
and reactance calculation, Circle diagram, Dispersion coefficient – effect on maximum output power factor
(2)DESIGN OF SINGLE PHASE INDUCTION MOTOR:
Construction details, Design of main dimensions, Design of stator, Design
of rotor, Design of auxiliary winding.
PERFORMANCE PARAMETERS
EVALUATION:
Rotor resistance, Stator resistance, Iron loss, Friction and Windage loss,
Design of main dimensions, Design of stator, Design of rotor, Design of auxiliary winding.
PERFORMANCE PARAMETERS EVALUATION:
Rotor resistance, Stator resistance, Iron loss, Friction and Windage loss, Starting
torque, Circle diagram, Calculation of capacitance for maximum torque.
(3)DESIGN OF SYNCHRONOUS
MACHINE:
ARMATURE DESIGN:
Armature winding (Single layer and double layer), Number of armature slots, Slot dimensions, Length of mean turn, Calculation of armature resistance and reactance.
DESIGN OF FIELD SYSTEM:
Design of magnetic circuit, Open circuit characteristic, Determination of full load field MMF, Design of field winding, Determination of direct
and quadrature axis synchronous reactance, Short circuit characteristics.
DESIGN OF TURBO ALTERNATORS:
Main dimensions, Length of air gap, Stator & Rotor design.
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