ELEC 226 Class Notes, Spring 2009

Notes from ELEC 225:

• Notes on the node-voltage method
• Notes on the mesh-current method
• Methods for finding Thevenin model
• Review of phasors, impedance, and circuit analysis: http://web.cecs.pdx.edu/~prasads/Phasors.pdf
• Illustrations of sinusoids and phasors
• Rotating phasors
• Chapter 6 review

January 19: See ELEC 226 on Blackboard for announcements about summer research opportunities.

January 21:

• See reference for EE with the TI-89 on Blackboard under Course Materials
• See Calculator Quiz from class with answers on Blackboard under Assignments
• Review exercises on sinusoids, phasors, and impedance

January 29 & February 2:

• Linear Transformer
• Ideal Transformer

February 9: Linear and ideal transformer limits and example problem 9.79

February 11: Matlab program ch10.m to demonstrate steady-state power in Chapter 10.

February 12:

• Modernizing the energy grid (USA Today, Jan. 29, 2009)
• Transformer illustration #1
• Transformer illustration #2
• Transformer purposes
• Transformer applications
• Transmission lines for power

February 16:

• Formulas and definitions in Chapter 10
• What is Reactive Power?
• Analogies for reactive power
• Matlab program maxpower.m to demonstrate maximum power transfer in sinusoidal steady-state circuits.

February 18:

• Power factor correction
• Is Power Factor Correction Justified in the Home?
• More on power factor correction
• Matlab program maxpower.m to demonstrate maximum power transfer in sinusoidal steady state circuits

March 2:

• Insights for Filter Design
• Chapter 6 review

March 4 and 16:

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

March 18 and 23: Chapter 7 exercises: RL and RC natural response, and Problems 7.20, 7.31

March 23: Our last lab session will not be on April 16, but it will be on either April 9 or 23.

March 30:

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

April 1:

• Example problems 7.46 and 7.83 (see solutions on Blackboard/Course Materials)
• Exam 2 will be on Monday, April 6. The topics will include maximum power transfer in sinusoidal steady-state circuits (Section 10.6) and natural and step response of RC and RL circuits (Sections 7.1 through 7.4). The relevant homework assignments are 7, 8, 9, and 10.
  The exam will be open-book and open-notes, and you will need your calculator.

April 2: Matlab program oscil.m to illustrate oscillator waveform.

April 13 & 15:

• RLC circuits (parallel and series)
• Notes on natural and step response of RLC circuit

April 20 & 22:

• Example Problems 8.16 and 8.36
• Views of second-order systems
• Laplace transform and s-domain circuits
• Steps for circuit analysis with Laplace transform