Download ECE 202 Lab Report: Series Resonant Circuit Experiment and more Lab Reports Electrical and Electronics Engineering in PDF only on Docsity! ECE 202 – Experiment 8 – Lab Report 8-1 SERIES RESONANT CIRCUIT YOUR NAME______________________ GTA’S SIGNATURE_________________ LAB MEETING TIME______________ (4) SELECTION OF CIRCUIT PARAMETERS Assemble the resonant circuit of Part 1. Use the function generator for Vs and choose values of Rs and sV to provide Im = 0.1 mA while Rs >> R. (a) The instructor will provide a 1.0 mH inductor. Use the HP Impedance Analyzer or the HP LRC Meter to measure and record the inductance and series resistance of this inductor. L = ______________ (Experimental) Rind = _______________ (Exp) (b) Knowing the measured value of L, select a capacitor which approximately yields fo = 50 kHz. Use the Impedance Analyzer or LRC Meter to measure and record the capacitance. C = ______________ (Experimental) (c) Knowing the measured value of L and RS, select the resistor R which approximately yields a B = 5 kHz. Measure and record this resistance. R = _______________ (Experimental) (d) Comment on the effect RS had on the selection of R. ECE 202 – Experiment 8 – Lab Report 8-2 (5) VOLTAGE RESPONSE OF CIRCUIT WITHOUT LOADING NOTE: The measured circuit element values (determined above) should be used in the rest of the lab to calculate the theoretical parameters describing the circuit. (a) Measure the voltage response (f)VR of the parallel resonant circuit of Part 4 using the DMM. Record a sufficient number of points (i.e., 12-15) to clearly determine the resonance behavior of the RLC circuit. Also observe the waveforms at vS(t) and vR(t) on the oscilloscope. (b) Plot (f)VR versus f for both the theoretical calculation and experimental data on the same axes. Discuss the results. (c) Determine the resonant frequency, fo, of the circuit. fo = _______________ (Exp) _______________ (Theory) (d) Verify that at the resonant frequency, the voltage measured across the resistance R is a maximum. (e) Determine the bandwidth of the circuit. f1 = ______________ f2 = _______________ B = _______________ (Exp) _______________ (Theory) Is the bandwidth evenly distributed about the resonant frequency? (f) Determine the Q factor of the circuit. Q = _______________ (Exp) ______________ (Theory) (g) From your observations with the oscilloscope, was there a phase shift between vS(t) and vR(t)? Did vR lead or lag with respect to vS? Describe. (h) Explain the reasons for any discrepancies between theory and experiment. HINT: Include the effect of the series resistance Rind of the inductor (see appendix to this experiment).
