ELECTRIC CIRCUITS ECSE2010 Spring 2003 Class 37

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ELECTRIC CIRCUITSECSE-2010Spring 2003Class 37

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ASSIGNMENTS DUE

• Today (Monday)
• Homework 13 Due
• Will do Experiment 10 in Class (EP-10)
• Activity 37-1 (In Class)
• Tuesday/Wednesday
• Will do Computer Project 5 in Class (CP-5)
• Activities 38-1, 38-2 (In Class)
• Thursday
• Experiment 9 Report Due
• Activities 39-1, 39-2 (In Class)

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FINAL EXAM

• Wednesday, May 7, 8-11 am
• Sage 3303 All Sections
• Unit IV Comprehensive
• 2-8 1/2 x 11 Crib Sheets Allowed
• Laplace Tables will be Provided
• Students with Conflicts Should Notify Prof.
  Jennings (jenniw_at_rpi.edu)

4
REVIEW

• Spent Thursday on Lissajous Figures
• Experimental Technique for Determining Amplitude
  Ratio and Phase Shift
• of Sinusoids
• Used Scopes in X-Y Mode
• Drive x axis of Scope with x(t)
• Drive y axis of Scope with y(t)
• Measure A, B, C gt Determine

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RESONANT CIRCUITS

• Will now look at both Series Resonant and
  Parallel Resonant Circuits
• Will examine Resonant Circuits Analytically,
  Experimentally, and by using Phasor Diagrams
• Can use Knowledge of Relationship between I and V
  for R, L, C, plus Phasor Diagrams, to
  Solve/analyze many AC Circuits Will use
  Resonant Circuits as an Example

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RESISTOR
IR
VR -
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RESISTOR
Imaginary
IR
VR
Real
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CAPACITOR
IC
VC -
9
CAPACITOR
Imaginary
IC
VC
Real
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INDUCTOR
IL
VC -
VL -
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INDUCTOR
Imaginary
VL
IL
Real
12
SUMMARY

• I, V always in Phase for R
• I always leads V by 90o for C
• I always lags V by 90o for L
• gt Can use this information to construct Phasor
  Diagrams that help analyze circuit behavior gt
  Solve graphically rather than with equations

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SERIES RESONANCE
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SERIES RESONANCE
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SERIES RESONANCE
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SERIES RESONANCE
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SERIES RESONANCE
V
Direction of I
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SERIES RESONANCE
Direction of VL
V
Direction of I IR IL IC
Direction of VR
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SERIES RESONANCE
Direction of VL
V
VLVC
VR
Direction of I IR IL IC
Direction of VC
Direction of VR
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SERIES RESONANCE
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SERIES RESONANCE
Direction of I, VR
VR
Direction of VL
VLVC
V
Direction of VC
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SERIES RESONANCE
Direction of VL
V, VR, I
VL - VC
Direction of VC
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SERIES RESONANCE

• Choose
• X 0 Resistive
• 0
• See Diagram gt V VR
• VL - VC

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SERIES RESONANCE
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SERIES RESONANCE
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SERIES RESONANCE
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SERIES RESONANCE
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SERIES RESONANCE
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SERIES RESONANCE
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ACTIVITY 37-1
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ACTIVITY 37-1
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EXPERIMENT 10
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EXPERIMENT 10
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PARALLEL RESONANCE
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PARALLEL RESONANCE
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PARALLEL RESONANCE
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PARALLEL RESONANCE
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PARALLEL RESONANCE
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TYPE OF RESONANCE
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PARALLEL RESONANCE
Direction of IC
V, I, VR
IC - IL
Direction of IL
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PARALLEL RESONANCE
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PARALLEL RESONANCE
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PARALLEL RESONANCE
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SUMMARY