ECE 121-Lab#3_Assignment_Thevenin_Norton equivalent circuits

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Lehigh University *

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121

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Mechanical Engineering

Date

Feb 20, 2024

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pdf

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4

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ECE 121 (Spring 2024) Lab#3 (Thevenin, Norton, Maximum Power Transfer) Report writing format: 1. Objectives 2. Introduction 3. Results& Analysis (answer the following problems in this section) & 4. Conclusion & Discussion Submission Format: pdf file. This lab has 3 parts: 1. Thevenin Part (Calculated, Measured, Simulated) 2. Norton Part (Calculated, Measured, Simulated) 3. Maximum Power Transfer (Calculated, Measured, Simulated) Problem#1: Thevenin & Norton Part: (50 Points) Try to get the component closer to the circuit (shown below) component value in the laboratory and build the circuit. Now you do all the measurements and simulations with the same value for your circuit. Q1. Determine the Thevenin equivalent circuit external to the resistor R (Calculation). Q2. Determine the Norton equivalent circuit external to the resistor R (Calculation). Q3. Compare the Thevenin resistance and Norton resistance (Calculation). Q4. Determine the Norton current from the Thevenin equivalent circuit and compare these two values (Calculation, Simulation, Measurements). For the simulation and measurements build the original and equivalent circuit and compare the values. Q5. Determine the Thevenin voltage from the Norton equivalent circuit and compare these two values. (Calculation). Q6. For all calculations, measurements * simulations compare values and list in the following table.
Figure: Problem 1.1 Figure: Problem 1.2
Problem 1.1 Calculated Measured Simulated R TH x x R N x x E TH x x x I N x x x Problem 1.2 Calculated Measured Simulated R TH x x R N x x E TH x x x I N x x x Problem#2: Maximum Power Transfer (30 points) For the above network, determine the value of R for maximum power to R. Plot PL versus RL and justify your answer by taking some measurements. R L P L (Measured) P L (Simulated)
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Hints: First draw the equivalent circuit, build it, and measure the power across the load. *Add your simulated screenshots as proof of your answer. For the measurements, show your demo to the TA. Grading Rubric: Writing = 20 points Answer = 80 points Lab demo, simulation, and hand calculation have an equal distribution of points.