EE Lab 6
EE Lab 6 EE 1106 - 001
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This 7 page Bundle was uploaded by Kumar Jyoti on Sunday January 3, 2016. The Bundle belongs to EE 1106 - 001 at University of Texas at Arlington taught by Gregory K Turner in Fall 2015. Since its upload, it has received 52 views. For similar materials see ELECTRICAL ENGINEERING FRESHMAN PRACTICUM in Electrical Engineering at University of Texas at Arlington.
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Date Created: 01/03/16
EE1106 – Introduction to Electrical Engineering Practicum Lab Report Grading Rubric (To be attached as a coversheet to EVERY report) FORMATTING (see comments in graded report for more explanation): Formatting Evaluation Key (Lab 1, 2, 3, 4): 0 = Absent 1 = Extremely Lacking 2 = Poor 3 = Fair 4 = Good 5 = Excellent Formatting Evaluation Key (Lab 5 and all succeeding labs): 0 = Extremely Lacking 1 = Poor 2 = Fair 3 = Good 4 = Excellent 5 = Perfect Primary Structure: _____ Proper margins/spacing is used throughout the report (IEEE format) _____ Proper formatting of section titles and subtitles (IEEE format) _____ Proper font and font size (IEEE format) _____ Overall consistency of formatting throughout the report Figures/Tables: _____ Figures/tables are appropriately named and numbered (IEEE format) _____ Figures/tables are appropriately sized and spaced _____ Screenshots are neatly cropped and clear Spelling, Grammar, and Writing Style: _____ Spelling _____ Passive voice is used throughout the ENTIRE report _____ Sentence Structure _____ Paragraph Structure (IEEE format) _____ References (IEEE Format) CONTENT (see comments in graded report for more explanation): Content Evaluation Key: 0 = Absent 1 = Extremely Lacking 1 2 = Poor 3 = Fair 4 = Good 5 = Excellent _____ Abstract provides endtoend coverage of the objectives and purpose of the lab experiment _____ Introduction demonstrates a working understanding of major theoretical concepts required for the experiment _____ Procedure is sufficiently detailed and clearly describes all steps taken during the lab experiment _____ Results are sufficiently detailed and data is neatly organized _____ Discussion is a thoughtful analysis of all experimental results and data _____ Discussion demonstrates a working understanding of the purpose of the experiment performed _____ Conclusion sums up the overall accomplishments of the experiment _____ Conclusion sums up the benefits (to the student) of performing the experiment 2 Lab Report 6 Network Theorem Part 2 Kumar Aman Jyoti Electrical Engineering University of Texas at Arlington Arlington, Texas Kumar.firstname.lastname@example.org ABSTRACT: This paper is about learning how to represent circuit diagrams on a Bread Board using circuit element as to make an actual circuit and observe its behavior. Apart from this we will also learn having specified values for resistors and voltage from the source, how the My DAQ is used as a digital multimeter to measure the resistance on each resistor as well as the voltage from the source. We were able to compare the calculated values with the measured values. Additionally we will learn to investigate and apply the Thevenin’s theorems on resistive networks to provide a handson experience to the theory. I. INTRODUCTION Any black box containing resistances only and voltage and current sources can be replaced to a Thevenin’s equivalent circuit consisting of an equivalent voltage source in series The purpose of this lab is to gain familiarity with several connection with an equivalent resistance important Electrical Engineering theorems. The experiments performed in this lab involves the Thevenin’s theorem which states thaAny linear electrical network with voltage and current sources and only resistances can be replaced at II. PROCEDURE The circuit shown below is in a box and the only terminals terminals AB by an equivalent voltage source Vth in series that can be accessed externally from this box are the terminal connection with an equivalent resistance Rth. This equivalent A and B. In the procedure below any reference to the voltage Vth is the voltage obtained at terminals AB of the network with terminals AB open circuited. This equivalent Thevenin terminals is referring to the terminals A and B. So resistance Rth is the resistance obtained at terminals AB of ETH is referring to the voltage across the terminals A and B. the network with all its independent current sources open First of all we measured the individual resistor values for the circuited and all its independent voltage sources short circuit below and recorded in the lab notebook. Secondly circuited. from the Multisim analysis as uploaded with the Lab Report we calculated the values for the Thevenin’s voltage source ETH, Thevenin’s resistance RTH, and the current IL through RL using the specified values of the components and recorded in lab notebook. After then we calculated values for 3 ETH, RTH, and IL using the measured values of the components and recorded in lab notebook. As you can see in the fig we built the circuit on my breadboard and then measured the values of the voltage sources at the circuit (not at the supply), and recorded in my lab notebook. Now after applying the DMM to measure values for ETH, RTH, and IL and recorded. Calculated the difference in percent (%) between ETH, RTH, and IL measured from the network and those calculated with specified resistor values as the basis, and record build the second circuit in Multisim (the one with just Eth and Rth). Place a 7.5kOhm resistor between A and B. Measure VAB. Now place a 7.5kOhm resistor on the breadboard between A and B. Measured VAB and verify that it matches Multisim. Fig 2: My Circuit in Breadboard for Lab 6 III. GRAPHS AND TABLES Figure 1: Circuit A shows the two power sources having a common node. Now apply the Thevenin’s theorem to calculate the total voltage for VAB by adding the values calculated from specified component values and then record in the table. Also calculate the total voltage for VAB by adding the values calculated from measured component values and record again. With EG1 and EG2 turned on and operating we measured the total voltage VAB directly. Table 1(a) – Measured value of the components 4 Thevenin’s Theorem makes this easy by temporarily removing the load resistance from the original circuit and reducing what’s left to an equivalent circuit composed of a single voltage source and series resistance. The load resistance can then be re-connected to this “Thevenin’s equivalent circuit” and calculations carried out as if the whole Table 1(b) – Thevenin’s Equivalent network were nothing but a simple series circuit: IV. DISCUSSION While performing procedures for experiments on a collection of resistive networks we learned different types of methods and theorems too. These experiments involve the theory and applications covered in the lecture on Thevenin’s equivalent. Suppose I have a collection of parts with the same nominal value and some tolerance, say 50 Ohm 1% tolerance resistors. What distribution of actual component values can I expect The parts follow a normal distribution with standard deviation 0.5 Ohms 95% of parts will be within 0.5 Ohms of the nominal value 100% of parts will be within 0.5 Ohms of the nominal value.This the reason why we get differences between calculated and measured values. Thevenin’s Theorem is especially useful in analyzing power systems and other circuits where one particular resistor in the circuit V. CONCLUSION (called the “load” resistor) is subject to change, and re-calculation of the circuit is After doing this lab we were able to learn about some terms necessary with each trial value of load which was used further to derive and use it to understand resistance, to determine voltage across it and how to measure and calculate the terminal characteristics between nodes on a circuit with power sources. We also current through it. Let’s take another look at learned about the Thevenin’s Theorem which states that any our example circuit: combination of batteries and resistances with two terminals can be replaced by a single voltage source e and a single series resistor r. The value of e is the open circuit voltage at the terminals, and the value of r is e divided by the current with the terminals short circuited. We also investigated and applied the above theorems on resistive networks to provide a handson experience to the theory covered of about Thevenin’s Theorem. 5  Lab 6 handout from Lab wiki page V. REFERENCES  Google  Wikipedia 6
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