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The document explains the concept of source transformation between voltage and current sources in electrical circuits. It describes how a practical voltage source can be converted into an equivalent current source and vice versa, while maintaining the same terminal voltage and load current. The internal resistance of the sources plays a crucial role in these transformations, ensuring that the equivalent sources provide identical open circuit voltage and short circuit current.

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11 views2 pages

Place ST

The document explains the concept of source transformation between voltage and current sources in electrical circuits. It describes how a practical voltage source can be converted into an equivalent current source and vice versa, while maintaining the same terminal voltage and load current. The internal resistance of the sources plays a crucial role in these transformations, ensuring that the equivalent sources provide identical open circuit voltage and short circuit current.

Uploaded by

rakha.sp
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Sourcetransformation:

Acurrentsourceoravoltagesourcedrivescurrentthroughitsloadresistanceandthe magnitude of
the current depends on the value of the load resistance.

Considerapracticalvoltagesourceandapracticalcurrentsourceconnectedtothesameload
resistance RL as shown in the figure

R1’sinfigurerepresentstheinternalresistanceofthevoltagesourceVSandcurrentsourceIS.

Twosourcesaresaidtobeidentical,whentheyproduceidenticalterminalvoltageVLandloadcurrent IL.

Thecircuitinfigurerepresentsapracticalvoltagesource&apracticalcurrentsourcerespectively,with load
connected to both the sources.

TheterminalvoltageVLandloadcurrentILacrosstheirterminalsaresame.

Hencethepracticalvoltagesource&practicalcurrentsourceshowninthedottedboxoffigureare equal.

Thetwoequivalentsourcesshouldalsoprovidethesameopencircuitvoltage&shortcircuitcurrent.

Fromfig(a) Fromfig(b)

IL= I
IL=

= I

VS =IR orI =
Henceavoltage sourceVsinseries with its internal resistanceRcanbeconverted
intoacurrentsource

I = ,withitsinternalresistanceRconnectedinparallelwithit.SimilarlyacurrentsourceI
in parallel with its internal resistance R can be converted into a voltage source V = IR in
series with its internal resistance R.

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