quiz07sp01_sols

quiz07sp01_sols - THE THEVENIN VOLTAGE IS THE OPEN CIRCUIT...

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Unformatted text preview: THE THEVENIN VOLTAGE IS THE OPEN CIRCUIT VOLTAGE FIND THE THEVENIN EQUIVALENT AT TERMINALS a - b USE SOURCE TRANSFORMATION VS R3 + − + − IS R1 R1 a + R2 VTH b− + R1I S − R1 a RTH = R3 + ( R1 || R2 ) R2 VTH = RTH VTH b R2 (VS + R1I S ) R1 + R2 Vs[V] Is[mA] R1[kOhm] R2[kOhm] R3[kOhm] Rth[kOhm] Vth[V] a b RTH a + − + VTH − R2 b R3 NOW A VOLTAGE DIVIDER FOR THE THEVENIN RESISTANCE OPEN CURRENT SOURCES AND SHORT CIRCUIT VOLTAGE SOURCES R3 VS 15 20 20 5 8 12 83 24 12 6 12 6 10 64 18 10 12 6 12 16 46 25 8 5 20 10 14 52 FIND THE THEVENIN EQUIVALENT AT TERMINALS a - b I2 = I S 2 IS2 I3 = I S −VS1 + R1(I1 − I2 ) + R2 (I1 − I3) + R3I1 = 0 I2 R1 R2 I3 + a IS VTH + VS 1 − I1 R3 KVL I1 = VS1 + R1I S 2 + R2 I S R1 + R2 + R3 KVL − VTH + R1 ( I 2 − I1 ) + VS = 0 VTH = VS + R1 ( I S 2 − I1 ) Vs1[V] 20 18.000 24 36 Is[mA] 8 6.000 6 20 Is2[mA] 10 12.000 88 R1[kOhm 5 3.000 20 10 R2[kOhm 8 2.000 34 26 R3[kOhm 12 4.000 Rth[kOh 4 2.000 45 I1 5 7.333 8 10 Vth[V] 43 32.000 22 18 − b a R1 R2 RTH RTH = R1 || ( R2 + R3 ) a + VTH − R3 b b ...
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This note was uploaded on 12/01/2011 for the course EE 2120 taught by Professor Aravena during the Fall '08 term at LSU.

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quiz07sp01_sols - THE THEVENIN VOLTAGE IS THE OPEN CIRCUIT...

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