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Anna university
**Course:
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B.Tech
**Specialization:
**Electrical and Electronics Engineering**Views:
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DEPARTMENT OF ELECTRICAL ENGINEERING
BASIC ELECTRICAL ENGINEERING (4 credit)
Course Code: BEE1101
(1ST AND 2ND SEMESTER)
SYALLABUS
MODULE-I (10 HOURS)
DC Networks: Kirchhoff's laws, node and mesh analysis, Delta-star and star-delta
transformations. Superposition, Thevenin’s and Norton's theorem. Transients in RL, R-C and R-L-C circuits with DC Excitation.
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Single Phase AC Circuits: Single phase EMF generation, average and effective
values of sinusoids, j operations, complex representation of impedances, phasor
diagrams, power factor, power in complex notation, solution of series and parallel
circuits. Introduction to resonance in series RLC circuit.
MODULE-II (10 HOURS)
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Three Phase AC Circuit: Three phase EMF generation, delta and star connection,
Line and Phase quantities. Solutions of 3-phase circuits with balanced load. Power
in 3-phase balanced circuits.
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Magnetic Circuits: B-H Curve, Hysteresis, Permeability and reluctance, solution of
simple magnetic circuits, Hysteresis and Eddy current losses.
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DC Generator: Different types, Principle of Operation of DC generator, EMF
equation, methods of excitation. DC Motor: Back e.m.f., speed and torque of a DC
Motor, Conditions for maximum Power. Speed control of DC shunt motor.
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Transformers: Construction and Principle of operation of single-phase transformer,
EMF equation, Single-phase autotransformer.
MODULE-III (10 HOURS)
Three phase Induction Motor: Construction and principle of operation, types; Sliptorque characteristics.
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Synchronous Machines: Construction & principle of operation of Synchronous
generator and motor. EMF equation, Voltage regulation, Applications and starting
of Synchronous motor.
Introduction to single-phase induction Motor.
MODULE-IV (10 HOURS)
Measuring Instruments: DC PMMC instruments, Extension of range by shunts and
multipliers. Moving iron ammeters and voltmeters, Dynamometer type Watt
meters, Induction type Energy Meter.
Power supply systems: Principle of generation - thermal, hydel and nuclear.
Transmission and distribution of electric energy. Introduction to Electric Heating
& Welding.
TEXT BOOK
Edward Hughes (revised by Ian McKenzie Smith). "Electrical & Electronics
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[1].
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Technology" Pearson Education Limited. Indian Reprint 2002.
H.Cotton, “Advanced Electrical Technology", CBS Publishers, New Delhi,
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[2].
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REFERENCE BOOKS
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7th Edition.
C.L. Wadhwa, “Electrical Engineering”, New Age International Publishers.
[4].
D.Kulshreshtha, “ Basic Electrical Engineering” TMH
[5].
S. Parker Smith: “Problems in Electrical Engineering" Asia Publications.
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[3].
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MODULE-I
D.C NETWORKS
1.1 Kirchoff’s Laws:1.1.1. Kirchoff’s current law or point law (KCL)
Statement:- In any electrical network, the algebraic sum of the currents
meeting at a point is zero.
Σ I = 0 ……………………at a junction or node
Assumption:- Incoming current = positive
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Outgoing current = negative
1.1.2. Kirchoff’s voltage law or mesh law (KVL)
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Statement:- The algebraic sum of the products of currents and resistances in
each of the conductors in any closed path (or mesh) in a network plus the
algebraic sum of the emfs in that path is zero.
Σ IR +Σemf = 0 …………………………..round the mesh
Assumption:- i) Rise in voltage (If we go from negative terminal of the
battery to positive terminal) = positive
ii) Fall in voltage (If we go from positive terminal of the battery to negative
terminal) = negative
iii) If we go through the resistor in the same direction as current then there is
a fall in potential. Hence this voltage is taken as negative.
iv)If we go through the resistor against the direction of current then there is a
rise in potential. Hence this voltage drop is taken as positive.
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Example:- Write the loop equation for the given circuit below
(Supplementary exam 2004)
E1
r1
i
r2
E2
r3
E3
Solution: Apply KVL to the loop,
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− ir1 − E 1 − ir2 + E 2 − ir3 − E 3 = 0
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⇒ E 1 − E 2 + E 3 = − ir1 − ir2 − ir3
MAXWELL’S LOOP CURRENT METHOD (MESH ANALYSIS)
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⇒ E 1 − E 2 + E 3 = − i ( r1 + r2 + r3 )
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Statement:- This method determines branch currents and voltages across the
elements of a network. The following process is followed in this method:-
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• Here, instead of taking branch currents (as in Kirchoff’s law) loop currents
are taken which are assumed to flow in the clockwise direction.
• Branch currents can be found in terms of loop currents
• Sign conventions for the IR drops and battery emfs are the same as for
Kirchoff’s law.
• This method is easier if all the sources are given as voltage sources. If there
is a current source present in a network then convert it into equivalent
voltage source.
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