ELEC 226 Class Notes, Spring 2010

Notes from ELEC 225:

• Notes on the node-voltage method
• Notes on the mesh-current method
• Methods for finding Thevenin model
• Illustrations of sinusoids and phasors
• Chapter 6 review (equations for R, L, and C)

January 21:

• See ELEC 226 on Blackboard for announcements about summer research opportunities.
• Review reference for EE with the TI-89 on Blackboard under Course Materials
• The following link also has steps for complex number computations with the TI-89 and TI-83/84:
  http://www.tc3.edu/instruct/sbrown/ti83/complx89.htm

January 26 & 28:

• Two junior EE students are available for tutoring and/or homework help as follows:
  • Trang Tran in Dana 303 on Wednesdays 7:00-9:00 PM
  • Dave Pike in Dana 303 Thursdays 7:00-9:00 PM
  They are available to help students in ELEC 120 and ELEC 226, so you may see students from ELEC 120 if you visit them.
• See Calculator Quiz from class with answers on Blackboard under Assignments
• Review exercises on sinusoids, phasors, and impedance

February 2:

• RC Circuit Example, showing basis for phasor/impedance analysis
• Illustrations of sinusoids and phasors
• Rotating phasors
• Review of phasors, impedance, and circuit analysis: http://web.cecs.pdx.edu/~prasads/Phasors.pdf

February 4, 9, & 11:

• See slides on Blackboard with review of mutual inductance from Chapter 6. Dot convention:
  • Current enters dotted terminal ==> voltage induced with "+" at other dotted terminal.
  • Current leaves dotted terminal ==> voltage induced with "-" at other dotted terminal.
• Formulas for permeance
• Linear Transformer
• Ideal Transformer

February 16 & 18:

• Transformer illustration #1
• Transformer illustration #2
• Transformer purposes
• Transmission lines for power

• Linear and ideal transformer limits and example problem 9.79

February 23:

• Formulas and definitions in Chapter 10

March 4, 9, 11:

• Matlab program ch10.m to demonstrate steady-state power in Chapter 10.
• What is Reactive Power?
• Analogies for reactive power

March 11 (Lab 4):

• Insights for Filter Design
• Chapter 6 review

March 25:

• Matlab program maxpower.m to demonstrate maximum power transfer in sinusoidal steady-state circuits.

March 30:

• True, reactive, and apparent power
• Power factor correction
• Is Power Factor Correction Justified in the Home? and pdf version with figures
• More on power factor correction

March 30 & April 6:

• Problems 7.2 and 7.28 (see solutions on Blackboard/Course Materials)

April 6 & 13:

• Time constant:
  e^-1=0.37
  e^-2=0.14
  e^-3=0.050
  e^-4=0.018
  e^-5=0.007
• Chapter 7 exercises: RL and RC natural response, and Problems 7.20, 7.31 (see solutions on Blackboard/Course Materials)

April 15 & 20:

• RC and RL circuits for step response
• Notes on step and natural response for RC and RL circuits
• Procedure for finding the step response
• Circuits for step response example problems 7.50 and 7.42 (see solutions on Blackboard/Course Materials)

April 22:

• Example problems 7.46 and 7.83 (see solutions on Blackboard/Course Materials)
• Matlab program oscil.m to illustrate oscillator waveform.

April 27:

• RLC circuits (parallel and series)

April 29:

• Notes on natural and step response of RLC circuit
• Example Problems 8.16 and 8.36

May 4 (optional material, not on final exam):

• Views of second-order systems
• Laplace transform and s-domain circuits
• Steps for circuit analysis with Laplace transform