Electric M/C - I

Simple & clean notes of electric m/c-I for electronics engineering.

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