Wk4L2_Lab4_Introduction_to_PSpice (2)

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School

New Mexico State University *

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E-E-230

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Electrical Engineering

Date

Feb 20, 2024

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docx

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Uploaded by SargentNightingale696

Preparation of the report: The report must be produced electronically using MS-WORD and submitted as a pdf file (e.g. use print to pdf). Tables showing data or results, figures and graphs should be produced electronically. Tables, figures, graphs and photos are to be embedded in the main body of the report. Include captions and titles for figures, graphs, tables and photos. Lab Safety: With proper procedures, the electrical lab is a perfectly safe place in which to work. There are some basic rules: No food or drink is allowed in lab at any time. Liquids are of particular danger as they are ordinarily conductive. While the circuitry used in the lab is normally of no shock hazard, spilling a bottle of water or soda onto such equipment could result in the experimenter receiving a shock. Software Installation: A free version of OrCAD Capture software is offered to students. This software supports developments of circuits schematics and provides use of the Spice simulation and analysis tools. This is a very large software package and will take a significant time to download and install. https://www.orcad.com/orcad-academic-program Once the software is downloaded start the program Capture and a screen similar to this should open: Screen Capture 1

Create a new project: From the start screen a new project can be created by clicking the NEW button or using Ctrl+N. After setting the location to save the project and project name, the schematic screen should appear. (Project names can NOT contain spaces or some special characters.) Screen Capture 2 Placing Circuit Elements: As with many software products, there are many ways to complete tasks. We will cover the basic starting approach needed for this class, but with internet searches and tutorials there are advanced techniques which can be learned. From the menu, click Place – PSpice Components to obtain the drop down.

Screen Capture 3 Choose Resistor and place several resistors on the schematic. With an element highlighted, right click and a menu will appear which allow manipulation of the element, Rotate is an important feature from this menu. Choosing will rotate the element 90 degrees. Screen Capture 4 After arranging the circuit elements as desired, the next step is to install wires connecting them. There is currently a glitch in the software which requires a two step process to connect two elements. From the Place menu select Wire and click in “white space” near and element you wish to connect, then move the curser to the element terminal. A red dot will appear, click again to make the connection. Repeat the process for the second element. You will have circuit similar to the below.

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Screen Capture 5 Now drag the open wire end to connect the two wires. Screen Capture 6 The terminal of R1 is not connect to the terminal of R2. Repeat for the additional connections needed. All circuits must contain a ground. From the Place-PSplice Components menu, select PSplice Ground and connect to a Ground node in the circuit. Your completed circuit should look something like the below:

Screen Capture 7 At this point, the source voltage is 0 Vdc and all resistors are 1kΩ. By double clicking an element, the Property Editor screen will appear. Edit the appropriate values, click Apply and return to the main schematic screen. Screen Capture 8 Now that our schematic is complete, we can use PSpice to preform analysis. From the menu select New Simulation Profile.

Screen Capture 9 After naming the simulation profile, a dialog box will open: Screen Capture 10 For now, we can use the default values. The run button should now be available Screen Capture 11

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A simulation window will open. If you circuit contains any opens, the simulation will not run and display a list of errors which must be corrected. If your circuit is complete, the analysis will run. Also, the schematic will be updated with the dc voltages displayed at the nodes. (Voltages are relative the circuit ground.) Screen Capture 12 For this simulation, we did not place any probes on our schematic so our simulation plot is blank. Voltage and current probes can be placed in the circuit using the icons below: Screen Capture 13

Student: EEE 202 Laboratory Exercise 4: Introduction to PSpice Date: Procedures Part 1: Node Analysis 1. Using OrCad Capture, create a schematic of the circuit of below, 2. Include two probes: for the voltage across R2 and the current through R3. 3. Run a simulation for the circuit. 4. Provide screen shots of the simulation plot and schematic. 5. Write two-three sentences interpreting the results of the simulation, include discussion of the simulation plots and how they relate to circuit analysis/behavior.