em-ii-class notes
DESCRIPTION
All the 5 Units notes of Electrical Machines iiTRANSCRIPT
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
UNIT I
SYNCHRONOUS GENERATOR
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Introduction
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Direction of induced e.m.f
Fig. Fleming's right hand rule for direction of induced EMF
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Generated EMF in a Synchronous Generator
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Frequency of an A.C. Synchronous Generator
Constructional Details of Rotor
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Figure 14: Synchronous machines with stator slots and armature windings omitted (a)Two pole cylindrical rotor,(b) Four-pole cylindrical rotor, (c) Developed view of two pole cylindrical rotor field structure, (d) Salient pole and field coil
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Fig. Cylindrical rotor mmf wave and its fundamental of a synchronous machine
Excitation Systems for Synchronous Machines
Brushless Excitation System
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Fig. Conventional excitation systems for synchronous machines
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Fig. Brush less excitation system
The Action of the Synchronous Machine
Armature Reaction
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
l
Figure 18: Stretched out synchronous generator
Figure 19: Stretched out synchronous motor
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Fig. Stretched out synchronous generator
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Fig. Stretched out synchronous generator
Theory of Salient-pole machines:(Blonde’s Two-reaction Theory)
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Experimental Determination of xd and xq
Losses and Efficiency
S
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Parallel Operation of two Generators
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Figure 35: Parallel operation
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
UNIT 3
THREE PHASE INDUCTION MOTOR
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Introduction
The Rotating Magnetic Field
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Principles of Torque Production
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Construction
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Equivalent Circuit
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Determination of Circuit Parameters
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
The no-load test
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Blocked-rotor Test
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
UNIT 4
STARTING AND SPEED CONTROL OF THREE PHASE INDUCTION
MOTOR
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Speed control of Induction Machines
Speed control by changing applied voltage
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Rotor resistance control
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Cascade control
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Pole changing schemes
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
Stator frequency control
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
www.Vidyarthiplus.com
www.Vidyarthiplus.com
ELECTRICAL MACHINES II NOTES
Einstein College of Engineering
www.Vidyarthiplus.com
www.Vidyarthiplus.com