ELECTRICAL MACHINES
AVAILABLE RESOURCES FOR ELECTRICAL MACHINES :
- SYLLABUS
- TEXT BOOK BY B.L THERAJA - CHAPTER WISE
- MATERIAL - BAKSHI
- PREVIOUS QUESTION PAPERS
- PREVIOUS MID PAPERS
- CHAPTER WISE ANIMATED VIDEOS
SYLLABUS :
Unit 1: POLYPHASE CIRCUITS
Star and why connections, vector diagrams, phase sequence, voltage, current relations in two phase and three phase circuits. Analysis of balanced three phase circuits. Measurements of power in three phase circuits.
Unit 2: TRANSFORMERS
Single phase transformer-construction-voltage equation, transformer on no-load and full-load. Equivalent circuit – losses- efficiency-auto transformer, use of transformers with instruments-testing of transformer – Short circuit test and open circuit test.
Unit 3: D.C.Machines
DC Generator – construction - armature windings – principle - e.m.f equation-armature reaction (in brief) and commutation- losses - efficiency - Generator characteristics
D.C.motor – construction- back e.m.f- - losses – efficiency- speed torque characteristics-starters-speed control testing.
Unit 4: Synchronous machines-
Alternators- principle and working - synchronous impedance-armature reaction (in brief) -e.m.f.equation-synchronous motor, nature of torque, vector diagram-characteristics of a synchronous motors-starting methods.
Unit 5: Induction motor-construction-theory of induction motor –efficiency-equivalent circuit and speed control.
TEXT BOOKS:
1. Electrical technology by B.L.Theraja.
2. Electrical technology by H.Cotton.
3. Electrical machinery by Fitzgerald/kingsley/umans.
4. Electrical machinery by Irving L.Kosow.
BUY BOOKS ONLINE :
DOWNLOADS :
TEXT BOOK :
ELECTRICAL TECHNOLOGY BY B.L THERAJA :
CHAPTER 1 :
CHAPTER 2 :
CHAPTER 3 :
CHAPTER 4 :
CHAPTER 5 :
OTHER MATERIALS :
PREVIOUS PAPERS :
VIDEOS : ( HIGH NET SPEED RECOMMENDED )
HOW DOES A TRANSFORMER WORK ?
CONSTRUCTION OF DC GENERATOR :
DC MOTOR , HOW IT WORKS ?
HOW DOES AN ALTERNATOR WORK ?
WORKING OF SYNCHRONOUS MOTOR
SINGLE PHASE INDUCTION MOTOR