Analysis of AC Series and Parallel RLC Resonance Circuits using Simulation

Laboratory Report Cover Sheet DeVry University College of Engineering and Information Sciences

Course Number: ECET210

Professor:

Laboratory Number: 5

Laboratory Title: Analysis of AC Series and Parallel RLC Resonance Circuits using Simulation and Construction

Submittal Date: Click here to enter a date.

Objectives:

Results:

Conclusions:

Observations/Measurements:

III. A. 1. Parallel Resonance Circuit Simulation:

Frequency, Hz	IS (RMS), mA	IC (RMS), mA	IL (RMS), mA
200
300
500
700
730
734
738
800
1000
1200
1400

III. A. 2. Parallel Resonance Circuit Plot:

III A. 3. Questions on Parallel Resonance Circuit with Switch J1 Closed:

a)	What happens to the source current, IS, as the frequency is changed from low to high? Describe in your own words.
Answer:
b)	Did the source current, IS, go through a minimum or maximum as the frequency is changed from low to high?
Answer:
c)	What is the source frequency at the source current, IS, minimum? What do you call the frequency at that point?
Answer:
d)	What do you notice from the values of the currents IC and IL at IS minimum?
Answer:
e)	What is the phase relationship between IC and IL at IS minimum?
Answer:
f)	What happens to the total impedance, ZP, of the parallel circuit at the current minimum? Choose the correct answer below:
Answer:	i) OPEN Circuit ii) SHORT Circuit
g)	Why is the source current, IS, minimum at this frequency?
Answer:

III. A. 4. Parallel Resonance Circuit Resonance Frequency with Switch J1 Open:

New resonant frequency with the J1 switch OPEN = Hz.

III. A. 5. Questions on Parallel Resonance Circuit with Switch J1 Open:

a)	What happened to the inductive branch of the circuit with the switch J1 OPEN?
Answer:
b)	Did the resonance frequency go UP or DOWN compared with the previous result?
Answer:
c)	Calculate the Quality Factor, Q of the inductor at this resonance frequency. Q = {ωres L }/ RL
Answer:

III. B. 1. Series Resonance Circuit Simulation:

Frequency, Hz	IS (RMS), mA	IC (RMS), mA	IL (RMS), mA
200
300
500
700
730
734
738
800
1000
1200
1400

III. B. 2. Series Resonance Circuit Plot:

III. B. 3. Questions on Series Resonance Circuit:

a)	What happens to the source current, IS, as the frequency is changed from low to high? Describe in your own words.
Answer:
b)	What is the source frequency at the source current, IS, maximum? What do you call the frequency at that point?
Answer:
c)	What do you notice from the values of the voltages VC and VL at IS maximum?
Answer:
d)	What is the phase relationship between VC and VL at IS maximum?
Answer:
e)	What happens to the total impedance, ZS, of the series L and C part of the circuit at this current maximum? Choose the correct answer below:
Answer:	i) OPEN Circuit ii) SHORT Circuit
f)	Why is the source current, IS, maximum at this frequency?
Answer:

III. C. 3. Resonance Circuit Measurement:

a)	What happens to the source current, IS, as the frequency is changed from low to high? Describe in your own words.
Answer:
b)	What is the source frequency at the source current, IS, maximum? What do you call the frequency at that point?
Answer:
c)	What do you notice from the values of the voltages VC and VL at IS maximum?
Answer:
d)	What is the phase relationship between VC and VL at IS maximum?
Answer:
e)	What happens to the total impedance, ZS, of the series L and C part of the circuit at this current maximum? Choose the correct answer below:
Answer:	i) OPEN Circuit ii) SHORT Circuit
f)	Why is the source current, IS, maximum at this frequency?
Answer:

III. C. 4. Value Matches Simulated Values:

Match? Yes _____ No ______

III. C. 5. Any Mismatches Explained:

Grade:

Deliverable	Points Available	Points Achieved
Laboratory Cover Sheet	8
Working Circuit(s)/Program(s)	8
Observations/Measurements	6
Questions	8
Total Points	30
Comments: