Electric M/C - I

Simple & clean notes of electric m/c-I for electronics engineering.it contain all important topics which are given below chapter wise

Unit-I Transformer-I

Working principle
e.mf. equation
construction
phasor diagrams
equivalent circuit
voltage regulation
losses
separation of hysteresis and eddy current losses
efficiency
tests: open circuit and short circuit
load
Sumpner’s test
Condition for maximum efficiency and regulation
Power and distribution transformer
allday efficiency
Excitation phenomenon
Autotransformer: working, advantages
its equivalent circuit and phasor diagram

Unit II Transformer-II

Three phase transformer: its construction
groups and connections
their working and applications
Scottconnection
Parallel operation of Transformers
Tap changers
cooling
conservator and breather
Pulse and high frequency transformers

Unit III Three phase Induction Motor-I

Working principle
construction
comparison of slip ring and squirrel cage motors
steady state analysis
phasor diagram and equivalent circuit
power flow diagram
torque-speed and power-speed characteristics
Losses and efficiency
No load and block rotor test
circle diagram

Unit IV Three phase Induction Motor-II

Starting of squirrel cage and slip ring motors
power factor control
Cogging & Crawling
Double cage &Deep bar Indication Motor
impact of unbalanced supply and harmonics on performance
speed control
Induction Generator. Applications

Unit V Single Phase Motors:


Single Phase Induction motor
double revolving field theory,
equivalent circuit and its determination
performance calculation
starting methods and types of single phase Induction motors
their working principle and applications
comparison with three phases Induction Motor
Single phase A.C. series motor
Servo motors
Linear Induction Motor