EXPERIMENT 7: VERIFICATION OF THEVENIN AND NORTON THEOREMS AND MAXIMUM POWER TRANSFER

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10 Οκτ 2013 (πριν από 4 χρόνια και 1 μήνα)

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İKU









Department of
Electronic Engineering

EE310


Circuit Theory

1


EXPERIMENT 7: VERIFICATION OF THEVENIN AND
NORTON THEOREMS AND MAXIMUM POWER TRANSFER

1.

Objectives



To verify

the practical usage of Thevenin and Norton Theorems.



To verify maximum power transfer theorem.


2.

Preliminary work



For the below given circuit,
find
I
L

load resistor current
, V
th

(Thevenin Voltage
source)
, R
th

(Thevenin OR Norton Resistor)

and I
N

(Norton Current source)
.




Repeat previous step by proteus simulation
.

o

Draw the load resistance power with respect to R
L

as a parameter.



Work out report questi
ons in advance, some of these questions will
probably
be asked
in LAB quiz.

3.

Experiment Equipments
:


KL
-
21001 main experiment unit
, Resistors
.


Procedure

1.

Set up the circuit given below.

2.

Measure I
L

load current.

Fill this value in
the result

table given belo
w.

3.

Measure the
open circuit
voltage across
a

and
b

terminals
(V
ab
=V
th
)
.

Fill this value in
the
result

table given below.

4.

Then measure short
-
circuit current across
a

and
b

terminals
. Note that this current is the
Norton current (
I
N
).

Fill this value in
the
result

table given below.

5.

Now disconnect voltage sources from the circuit and replace them with short circuit. For
this state
,

measure the net resistance across
a

and
b
. Note that this value is the Thevenin (or
Norton) Resistance
(R
TH

)

across
a

and
b
.

Fil
l this value in the result table given below.



R
L
=330
Ω
††

†††
㐷4

Ω

†††
㔶5

Ω

220Ω

33


47


IL

İKU









Department of
Electronic Engineering

EE310


Circuit Theory

2


EXPERIMENT 7 REPORT: VERIFICATION OF THEVENIN AND
NORTON THEOREMS AND MAXIMUM POWER TRANSFER

Date:






Gr
o
up No:


Name:






Surname:





Name:






Surname:







Results





















Questions:

1.

What is equivalent circuit?

2.

How could these equivalent circ
uits (Thevenin, Norton) be useful for circuit
analysis?

3.

How could you found load current by using Thevenin equivalent circuit?

4.

How could you found load current by using
Norton equivalent

circuit?

5.

What should be the load
resistance

value in order to have ma
x power?

6.

What are the other equivalent circuits that you know?

7.

What causes
the

difference between measured and calculated val
u
es?



Calculated

Proteus

Measur
ed

V
TH




R
TH




I
N





RL=330




I
L

P
RL

RL=47
0




I
L

P
RL



RL=
560




I
L

P
RL