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EE6352 Electrical Engineering and Instrumentation (All Units) Lecture Notes Niranjan
#1


   
Anna University , Chennai
Department of B.E. Electronics and Communication Engineering
Third Semester
EE6352 Electrical Engineering and Instrumentation
All Units Hand Written Lecture Notes by Niranjan Kumar
(Regulation 2013)

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Content :
ELECTRICAL ENGINEERING AND INSTRUMENTATION

UNIT-1

DC MACHINES
Introduction
Construction
Yoke
Pole cores and pole shoes
Field coils
Armature core
Armature windings
Commutators
Brushes and bearings
Armature windings
Wave windings
DC GENERATOR
Simple loop generator
Types of generator
1. Separately excited
2. Self excited
a. Series wound
b. Shunt wound
c. Compound wound
i. Long shunt
ii. Short shunt
Characteristics of DC generator
1. Open circuit characteristics
2. Internal characteristics
3. External characteristics
Application
EMF equation of a DC generator
Motor
Principle of operation
Types
Dc motor
1. DC shunt motor
2. DC series motor
3. DC compound motor
a. Short shunt compound
b. Long shunt compound
i. Cumulative compound
ii. Differential compound
Factors controlling the speed
1. Field control
2. Rheostatic control
3. Voltage control
Series motors
1. Field diverters
2. Armature diverters
3. Tapped field control
4. Paralleling field coils
Voltage control
Advantages
Disadvantages
Application
3 phase circuits
Generation of 3 phase voltages
Three phase windings connection
Problems

UNIT-2

TRANSFORMERS
Introduction
Transformer construction
Core type transformer
Principle of operation
EMF equation
Voltage transformer ratio
Transformer on NO-LOAD
Transformer ON LOAD
Equivalent circuit of transformer
Losses in transformer
1. Magnetic loss
2. Electrical loss
3. Iron loss
a. Hysteresis loss
b. Eddy current loss
Efficiency of a transformer
Condition for maximum efficiency
ALL – DAY efficiency
Voltage regulation
Auto transformer
Advantages
Disadvantages
Uses

UNIT-3

INDUCTANCE MACHINE AND SYNCHRONOUS MACHINE
Equivalent circuit of 3 phase induction motor
Equivalent circuit of motor
Types of 1 phase induction motor
Auto transformer starter
Classification of syn machine based on type
1. Stator
2. Rotor
Starting methods of 3 phase syn motor
Pitch factor
Voltage regulation
1. Direct method
2. Indirect method
Construction of v- curves
Different types of syn motor
1. Starting torque
2. Running torque
3. Pull-in torque
4. Pull-out torque

UNIT-4

BASICS OF MEASUREMENTS AND INSTRUMENTATION
Measurements
Instruction
Static characteristics
Dynamic characteristics
1. Accuracy
2. Error
3. Range
4. Repeatability
5. Reproducibility
6. Drift
7. Dead zone
8. Dead zone
9. Fidelity
ERRORS IN MEASUREMENTS
Types of error
1. Gross error
2. Systematic error
3. Random error
Thermistor
Resistance temperature detector
Piezo electric transducers
Application
INDUCTIVE TRANSDUCERS
Eddy current type inductive transducers
Capacitive transducers
Variation in capacitance
1. Change of distance
2. Change in common plate area
3. Change in dielectric
4. Using quartz diaphragms
Strain gauge transducers
Principle of operation
Basics forms of resistance wire strain gauges
Classification of transformers
1. Active transducers
2. Passive transducers
Rotary variable differential transducers (RVDT)
Capacitive microphone
Application

UNIT-5

ANALOG AND DIGITAL INSTRUMENTS
Digital voltmeter
Basic blocks diagram of DVM
Advantages
Classification
1. Ramp type DVM
2. Dual-slope integration type DVM
3. Integration type DVM
4. Successive – approximation DVM
Wheat stone bridge
Basic operation
Kelvin bridge
Maxwell bridge
Schering bridge
Wien’s bridge
Digital multimeter

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