Expt_21 - of all signals to an i 3 phase of 0 o at t = 0....

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Lab-in-a-Box Experiment 21: Phasor Analysis and Kirchhoff’s Current Law Name: ______________________ Pledge: _____________________ ID: ______________________ Date: ______________________ Procedure: 1 0 0 m 1 2 i 3 0 i 2 . 1 u 4 7 0 i 1 V s i n F R E Q = 1 2 5 0 V A M P L = 3 V O F F = 0 6 8 0 Figure 1: Circuit for verification of Kirchhoff’s current law in the frequency domain. Modeling: 1. In PSpice, construct the circuit shown in Figure 1. 2. Using transient analysis, make plots of 1 i , 2 i , and 3 i on the same graph. Run the transient analysis for 3 ms with a step size of 1 μs. Also, to avoid plotting data before the system has reached a steady state, start saving data after 1 ms. 3. Using this graph, determine the current phasors 1 i , 2 i , and 3 i . You may do this using the cursor functions in PSpice (e.g., Tront 2006). For the purposes of this lab, reference the phase
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Unformatted text preview: of all signals to an i 3 phase of 0 o at t = 0. 4. Print out a copy (or save an electronic copy) of the graph and label each current waveform. Measurements: 5. Build the circuit shown in Figure 1. 6. Place a 10 current shunt in both the 2 i branch and the 3 i branch. Be sure that one leg of each shunt is grounded . 7. On the software oscilloscope, produce the waveforms for i 2 and i 3 . 1 of 2 8. Using the oscilloscope, determine the current phasor for 2 i and 3 i using the same phase reference as in step 3. Do the experimental values match those found in step 3? 9. Use Kirchhoffs current law and phasor addition to find 1 i . Does this value match the value found in step 3? Last Revision: Rev 3.1: 6/22/2006 2 of 2...
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Expt_21 - of all signals to an i 3 phase of 0 o at t = 0....

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