Lecture (L3-5) Thevinin and Norton Equivalent Circuits

Due Feb 4, 2019 by 9:40am
Points None

Question of the Day:

What are Thevenin and Norton Equivalent Circuits, and how to you apply them in circuit analysis?
How do you find a Thevenin equivalent?

Self-Assessment: ECE1250_Assess3_5.pdf Download ECE1250_Assess3_5.pdf

Introduction: Many circuits are very complex and difficult to analyze. Or, we may have a circuit in a box where we can measure the outputs, but don't know what is inside the box. Thevenin/Norton equivalent circuits let us combine all of the complex or hidden parts of the circuit into a single 'black box' equivalent circuit, thus simplifying our analysis considerably.

Reference Material:

Textbook Section: Chapter3-5

Thevenin and Norton Cookbook.pdf Download Thevenin and Norton Cookbook.pdf

Video Lectures: (Watch at least videos 2 today and 2 for the next lecture):

https://www.youtube.com/watch?v=2N2TE-HP-j8 (Links to an external site.)

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http://youtu.be/WBPBkNFNeBw (Links to an external site.)

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Note: The 68 V independent source should have been turned off in the following video (but the dependent source stays on) when the 1 V source is connected at the output terminals. Here are the corrected equations for finding R_Th:

ECE1250_NC_Lect3-5_Correction.pdf Download ECE1250_NC_Lect3-5_Correction.pdf

http://youtu.be/fUqX62tbrxE (Links to an external site.)

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http://youtu.be/8xB9NFet8ak (Links to an external site.)

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EXTRA EXAMPLES:

Here is another explanation from Dr. Lee Brinton (SLCC):

Introduction to Thevinin equivalent circuits

http://www.youtube.com/watch?v=fQzItezCjMU (Links to an external site.)

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Techniques to determine the Thevinin model

http://www.youtube.com/watch?v=CTOlYfk5d8U (Links to an external site.)