source transformation

SOURCE TRANSFORMATION

Welcome to everyone… till today we have met with basic theme of our blog which includes some basic concepts of electrical field and electronics.

In electrical field we have covered the introduction concepts..

     1. Introduction.

     2. Circuit elements.

     3. Energy sources.

     4. Alternating sources.

Today we are again going through electrical concepts. One of the basic concepts is source transformation i.e. any practical voltage source in series with an internal impedance can be replaced with a current source in parallel with internal impedance.this means that the voltage souce and current source are mutually transferrable.

                                                              

     

Let V be the voltage source with an internal impedance R₁ in series  and a load resistance R_L then I₁ be the  current at load terminal

                                                                   I₁= v/(R₁+R_L) …………..(1)

                                                          

Let I be the current source with an internal impedance R₂ in parallel and a load resistance R_L then the current at load terminal

                                                                I₂= I R₂/(R₂+R_L) ……….(2)

                                                                             (1) = (2)

                                                                 v/(R₁+R_L) = I R₂/(R₂+R_L)   

                                                                   (R₁+R_L) = (R₂+R_L)

                                                                             R₁ = R₂

     This concludes that any practical voltage source in series with an internal impedance can be replaced with a practical current source with the same resistance In parallel with it.