* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download sdf - Milwaukee School of Engineering
Immunity-aware programming wikipedia , lookup
Variable-frequency drive wikipedia , lookup
Printed circuit board wikipedia , lookup
Electronic engineering wikipedia , lookup
Power inverter wikipedia , lookup
Electrical ballast wikipedia , lookup
Flexible electronics wikipedia , lookup
Fault tolerance wikipedia , lookup
Ground (electricity) wikipedia , lookup
Three-phase electric power wikipedia , lookup
Power engineering wikipedia , lookup
Integrated circuit wikipedia , lookup
Schmitt trigger wikipedia , lookup
History of electric power transmission wikipedia , lookup
Voltage regulator wikipedia , lookup
Surface-mount technology wikipedia , lookup
Electrical substation wikipedia , lookup
Power electronics wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Current source wikipedia , lookup
Power MOSFET wikipedia , lookup
Buck converter wikipedia , lookup
Switched-mode power supply wikipedia , lookup
Voltage optimisation wikipedia , lookup
Stray voltage wikipedia , lookup
Opto-isolator wikipedia , lookup
Surge protector wikipedia , lookup
Alternating current wikipedia , lookup
Milwaukee School of Engineering Electrical Engineering & Computer Science Department EE-2705 – Linear Circuits I: DC Experiment 2 Computer Circuit Simulation – Multisim for DC Analysis (adapted from that used in EE-2050) Name: Lab Partner: Date: Objectives: To learn how to use a computer-based simulation program (Multisim) to analyze DC electric circuits. The same simulation techniques also help in designing circuits. Background: In engineering, computer software is used extensively in the analysis and design of electrical and electronic circuits. Computer simulations are one of the fundamental tools that allow you to quickly and accurately determine how a circuit functions – especially in advance of actually constructing it. Pre-laboratory Requirements: If Multisim is not already installed on your laptop, login to the MSOE network and install Multisim 14.0 (or the most current version). Verify a successful install before coming to lab. Calculate the currents and voltages associated with the circuit shown on page 4 and record these values directly in Table 1 or within your laboratory notebook. Needed Equipment and Parts: Before coming to lab, go to Tech Support and check out the following (one set per two person team): breadboard, parts box, and hook-up wire. Procedures: 1. Launch Multisim and verify that the circuit workspace appears and that the blue buttons associated with the virtual toolbar appear in the upper right. If they are not enabled, then use View / Toolbars to enable it. Multisim uses both virtual components and power sources which can be set to any valued desired. In this way, any circuit can be readily constructed and tested. 1 2. Constructing a virtual voltage divider circuit: a. In the Virtual Toolbar, click on Power Source Components: e b. Click the DC Power Source icon and then click the workspace to place it in the drawing. Double-click it to change its “Voltage (V)” value to 10 volts. c. In the Virtual Toolbar, click on Basic Components: Click on the Resistor and place one on the drawing. Do the same to place a second one. To rotate the second one, right-click it and select “rotate 90 clockwise.” Change the resistors to 2k and 3k as shown. d. From the Power Source Components window on the Virtual Toolbar, choose Ground and place it on the drawing at the location at the circuit’s reference node. Now, wire the components together by clicking the first node, and then clicking the next node. e. Also, about two-thirds of the way down the right-hand Instrument Toolbar, click the Agilent Multimeter, and then place it on the drawing. Double-click the instrument icon to see the photo. Connect the icon as shown. Note how the terminals on the icon are positioned as on the real instrument. f. Turn on the Agilent Multimeter by clicking its Power button, and then press DC V to measure DC volts. g. Finally, click the “0/1” simulation on/off switch at the far upper right of the screen to start the simulation. After a few seconds the Agilent Multimeter should read the voltage (6 volts). h. Stop the simulation and delete the Agilent Multimeter. Now, use a Measurement Probe: which is in the Instrument Toolbar, near the bottom. i. Run the simulation and note how the Measurement Probe list box shows the voltage and current: j. Component abbreviations such as k (for kilo), u (for micro) and m (for milli) can be used. 2 k. Try the multimeter, at the top of the Instrument Toolbar, as a DC voltmeter (left), and also as a DC ammeter (right). Note how the connection is broken to insert the ammeter (DC is chosen using the “----“ button): l. While this experiment is not using any controlled sources, if it did you could click on the “Place Source” symbol at the upper left of the screen. This will show a complete set of components in the Library. From that you can select a controlled source of any type. Note the diamondshaped source, and the rectangular “sensor”, both of which would need to be connected. 3 Laboratory Assignment: 1. Construct the circuit shown in Multisim. Then ‘measure’ the currents I1-I3 and the node voltage, 1. Record these values in the Table 1 below. Do not yet close out Multisim. 2. Now, physically construct this circuit on your breadboard. Before connecting the resistors, however, measure the actual resistances associated with R1-R3 and record these values on the schematic. Set the DC supply to 12.0 vdc and power up your circuit. Measure and record the node voltage 1. Show how you can now derive the currents I1-I3 and record these values in Table 1. 3. Return to your Multisim circuit and replace R1-R3 with their actual measured resistance values. Rerun the simulation and record the currents I1-I3 and the node voltage, 1 in the table shown. 4. Compare and comment on the similarities and differences between your (pre-lab) calculated, simulated, and measured values. Table 1. Component Pre-lab calculated Simulated results results Voltage Current Voltage Current R1 Measured results Voltage Current Re-simulated results Voltage Current R2 R3 Consider also using Multisim to simulate and check any of your homework problems – but only after you have solved or attempted to solve them manually. It will be great practice and further help reinforce your understanding of basic circuit principles. 4