EE40 - ALL.pdf

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Department
Electrical Engineering
Course
EL ENG 40
Professor
Maharbiz
Semester
Spring

Description
LECSUPERPOSITIONTHEVENINFebruary 20 2013SuperpositionStep 1 Leave one source on turn others off set them to zeroStep 2 SolveStep 3 RepeatStep 4 Sum this only works for independent sources cant solve for nonlinear things like powerExample Findthe voltage at the extraordinary nodeI10 I20V10 I10V10 I20Superposition says that because this circuit is linear we can solve for Vx by combining these three equationsTheveninMethod 1a find short circuitb find open circuitc solveMethod 2 newa find either or b set all sources to 0c simplify to a single resistor which will equal the thevenin resistance LECTHEVENINMAXIMUM POWER TRANSFERFebruary 22 2013Thevenin EquivalenceMethod 3Step 1 solve for Step 2 add an external source to findset independent sources to 0Step 3 where is the external source you added which will cancelout and is the current running through it this method works with both independent and dependent sourcesexamplemesh 1 mesh 2 auxnow add in an external source and set independent ones to zeromesh 1 mesh 2 mesh 3 Maximum Power Transfer Theoremfind the resistance such that it maximizes the power through it take the derivative and set to 0 to find the max
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