thevenin_problem3 - Sample Problem Topic: Thvenin and...

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Sample Problem Topic: Thévenin and Norton equivalents Statement of Problem: Given the circuit shown in the figure below Find the Thévenin equivalent circuit w.r.t. terminals a and b. Solution To find the Thévenin equivalent circuit, we want to decompose this circuit into a simple voltage source and series resistor. We can start by using a “source transformation” technique on the 3A source and the 150 ohm parallel resistor. Source Transformations: Y Ω X (V) Y Ω X/Y (A) Redraw the circuit as follows: 450V 150Ω 10Ω 40Ω 300V a b + Vth - To get Vth, we use the mesh current analysis method: Define the current in the upper loop as i 2 (clockwise). Define the current in the bottom left loop as i 1 (cw). The mesh equations become: 300 = 8 * (i 1 ) + 40 * (i 1 i 2 ) -450 = (150 + 10) * i 2 + 40 * (i 2 -i 1 ) Solving these equations simultaneously, we get:
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This note was uploaded on 10/30/2011 for the course EE 215 taught by Professor Unknown during the Spring '05 term at University of Washington.

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thevenin_problem3 - Sample Problem Topic: Thvenin and...

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