Thevenin Theorem

Thevenin Theorem

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Thevenin Theorem - Overview

------------ PAGE 1 ------------ Presented by: Mahmudul Hasan Himel ------------ PAGE 2 ------------ Thevenin Theorem „H Any two DC network can be replaced by the equivalent circuit of a DC voltage source of a series resistance. Thevenin Equivalent Circuit ------------ PAGE 3 ------------ Example „H Find the thevinin equivalent circuit between a and b. Step- 1: Shortening voltage sources and removing the position of the network where the Thevenin equivalent circuit has be found. ------------ PAGE 4 ------------ Step 2: View back into the open circuited network i. e. from the open terminal A and B. Calculate equivalent resistance of the circuit, i. e. R Th . Now calculate the internal resistance of the network. We get the value of R Th = 5ohm. Of the Thevenin’s equivalent circuit . Step 3 : Draw the circuit as previous but keeping the Load Resistance removed from A and B terminal . ------------ PAGE 5 ------------ Step 4 : Find the individual Loops. Apply KVL ( Kirchhoff’s Voltage Law) and find out loop current. for loop 1: for loop 2: By solving two equations we get the value of I 1 = 1.041 A and I 2 = 1.25 A . ------------ PAGE 6 ------------ „H Step 5: Start journey from terminal A to B by choosing any path of branches. Calculate total Voltage that you have faced during journey. This voltage is V Th . Now by applying KVL again, we can write that, Thevenin’s Voltage V Th is 17.5V. ------------ PAGE 7 ------------ Thank You
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