Descripción: muestra el funcionamiento de un convertidor de par.
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EE101L Laboratory 2 University of California at Santa Cruz Baskin School of Engineering
EE101L Laboratory 2 Thevenin, Norton, and Matching Introduction Building on !hat you have learn Building learned ed in lab 1" this e#$eri%ent e#$eri%ent deals !ith resistive resistive circuits as !ell& 'his ti%e" the e%$hasis is on ho! circuits" !hich %ay $otentially be large and co%$licated" can be described by si%$le e(uivalent circuit %odels& )ou !ill investigate ho! a real voltage source such as a battery deviates fro% its ideal circuit %odel& In addition" you !ill use the load line %ethod to analyze a linear circuit& In the design $art" you !ill see that you don*t need to kno! the internal structure of a circuit in order to dra! the %a#i%u% $o!er fro% it& 'hevenin*s and +orton*s theore%s !ill allo! you to deter%ine the right load !ith t!o (uick %easure%ents& ,t the end of this lab" you should be able to •
Understand real voltage sources
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-e$lace an unkno!n circuit !ith a si%$le e(uivalent circuit
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.atch a resistive load to an unkno!n unkn o!n circuit for %a#i%u% $o!er transfer
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Understand gra$hical %ethods for linear circuits
'o$ics fro% the lecture you need to be fa%iliar !ith •
'hevenin*s and +orton*s theore%s
•
/o!er transfer to a load resistor
/age 1 of
EE101L Laboratory 2 /art 1 Basics of e(uivalent circuits 1& E(uivalent circuit for a resistive net!ork
a -ebuild your voltage divider circuit fro% lab 1 as sho!n above& /o!er it such that the voltage at the out$ut ter%inals vout is 3v& b Using your %easured resistance values" find and dra! the thevenin and +orton e(uivalents of this circuit& c 'ake a 10 4Ω $otentio%eter and set it to 1 4 Ω& -e$lace& Calculate the $o!er dissi$ated in the $otentio%eter&/56728- d 6ary your load resistance by setting the $otentio%eter to other values fro% 0 to 3k at least 9 other values& :eter%ine the dissi$ated $o!er for each value ;int )ou can use E#cel as !ell& /lot the $o!er versus load $otentio%eter resistance& ,t !hat resistance does the load $o!er have a %a#i%u%< .ake sure you have enough data $oints around the %a#i%u%& 2& -ealistic voltage source a =btain a >6 battery fro% the ', and deter%ine its 'hevenin e(uivalent& I&e& deter%ine its actual source voltage and its internal resistance -?battery& NOTE: DONOT short the battery ter%inals to %easure I SC@ 'his %ay da%age the battery& Instead you !ill have to %easure the o$en circuit voltage and a second $oint on the load line to deter%ine - '& :o this by connecting a resistor across the battery ter%inals and %easure the voltage and current across it&
/age 2 of
EE101L Laboratory 2
/art 2 .atching a load to an unkno!n circuit 1 2
=btain one of the nu%bered Ablack* bo#es fro% the ',& -ecord the nu%ber in your re$ort& :eter%ine the %atching load resistance for %a#i%u% $o!er transfer& Connect the %atching load across the out$ut ter%inals of the bo# and %easure the actual dissi$ated $o!er in the load& Co%$are !ith your e#$ectations&
