Hello,I have an expirment of lab for electrical engineering.data measured included in the pdf attached.instruction also in the attachmentplease do it pearfectly and don’t copy from anywheremany of my classmates are doing the same in the studypool please do it unique.Lab #7: Thevenin’s Theorem
§ Definition: “Any circuit of resistance elements
and energy sources with an identified terminal
pair (known as the load terminals) can be
replaced by a Thevenin equivalent circuit which
consists of an ideal voltage source Vt (Voc) in
series with a resistance Rt.
Lab #7: Thevenin’s Theorem
§ The Thevenin equivalent circuit can be obtained
by finding Vth and Rth .
§Vth èOpen circuit voltage across nodes (a,b)
§Rth è Open circuit equivalent resistance
across nodes (a,b)
§Isc è Short circuit current across (a,b)
Lab #7: Thevenin’s Theorem
§ Part I: Use Thevenin’s theorem to chose RL for
maximum power transfer.
§ Assume : R1 = 1 kΩ , R2 = 1 kΩ
§ Assume: Vs1= 4 VDC and Vs2= 3VDC
Lab #6: Superposition Theorem
§ Part I: Use Superposition theorem to compute the
currents and voltages across the 3 resistors.
§ Assume Vs1= AWG1= 4 VDC and Vs2= AWG2= 3VDC
§ Apply Vs1 and Vs2 from using AWG1, and AWG2 power
supplies on your ANALOG DISCOVERY board.
§ NOTE: To generate a DC output from the Digilent Analog
Discovery, make a sine wave with a 0V amplitude and then
use the offset to move the signal to the DC voltage
needed.
§Example: AWG1 è Amplitude = 0 V and Offset = 4V
§Example: AWG2 è Amplitude = 0 V and Offset = 3V
§Note that the graphical display of the output for AWG 1
and AWG2 is a straight line equal to 4V OR 3V.
Lab #7: Thevenin’s Theorem
§ Step#1: Draw the RTh circuit.
§ Remove the load RL and find RTh.
Lab #7: Thevenin’s Theorem
§ Step#2: Draw the VTh circuit.
§ Remove the load RL and find VTh.
Lab #7: Thevenin’s Theorem
§ Step#2: Draw the final Thevenin circuit.
§ Choose RL for maximum power transfer.
Lab #7: Thevenin’s Theorem
§ Part II: Build the Original circuit with 2 sources
§ Measure the currents and voltages across RL as you
vary RL from 100 Ω up to 1 kΩ . Enter your measured
values in Table #1.
§ Use a decade box or a variable resistor to vary RL.
§ Use your hand-held multi-meter to measure the
currents.
§Plot the power across P_RL (y-axis) versus RL (x-axis)
and show that the maximum power value occurs close
to the value that was predicted theoretically.
§ Explain any differences between the theoretical and
measured values.
Lab #7: Thevenin’s Theorem
Table 1: Voltage & Current across RL using Original Circuit
RL (Ω)
100
200
300
400
500
600
700
800
900
1000
Iload (Amps)
Vload (V)
Power_RL ()
Lab #7: Thevenin’s Theorem
§ Part II: Build the Thevenin circuit
§ Measure the currents and voltages across RL as you
vary RL from 100 Ω up to 1 kΩ . Enter your measured
values in Table #1.
§ Use a decade box or a variable resistor to vary RL.
§ Use your hand-held multi-meter to measure the
currents.
§Plot the power across P_RL (y-axis) versus RL (x-axis)
and show that the maximum power value occurs close
to the value that was predicted theoretically.
§ Explain any differences between the theoretical and
measured values.
Lab #7: Thevenin’s Theorem
Table 2: Voltage & Current across RL using Thevenin Circuit
RL (Ω)
100
200
300
400
500
600
700
800
900
1000
Iload (Amps)
Vload (V)
Power_RL ()
The outline of your laboratory report should be as follows:
1.
2
3.
4.
5.
6.
7.
Title
Date and your partners’ name(s).
Purpose of the experiment, in your own words (Do not copy the handout).
Equipment used.
Introduction (overall outline of your report).
Theory or Background (Include schematics, diagrams, etc.)
Experimental procedure and data. DO NOT FORGET THE UNITS.
(ALL DATA SHOULD BE TABULATED AND ALL FIGURES
NUMBERED.)
Results and discussion (error calculations, analysis of the results, and answers to all
the questions in the handout.)
Signature of all members of the group.
8.
9.
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attachment
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