Consider a network consisting of dc independent sources currentvoltage sources, dependent sources linear, and resistors. A convention is a standard way of describing something so that others in. Which results are the same at the load for both the equivalent circuit and the original circuit. Chapter 3 nodal and mesh equations circuit theorems 352 circuit analysis i with matlab applications orchard publications 3. Then find the current through rl 6, 16, and 36 example 4. Equation 1 in the diagaram expresses an external voltage v y. Exercice electronique resolution par methode superpositin, thevenin. A complex twoterminal circuit can be replaced by an equivalent circuit consisting of a voltage source. A pdf sheet of this problem with the solution and side space for notes can be downloaded below. A few examples are presented after this page to illustrate the use of thevenins theorem. Lutilisation des seules lois des mailles et des noeuds nous.
Thevenins example summary 1 the graph shown in the right hand side gives the final result for thevenins theory. For the love of physics walter lewin may 16, 2011 duration. Any two terminals of a network of any number of resistors, current sources andor voltage sources can be reduced to one voltage source in series with one resistor. It is a method for the reduction of a portion of a complex circuit into a simple one. We are interested in the port behaviour of this circuit, i.
Telechargez comme pdf, txt ou lisez en ligne sur scribd. Chapter 3 nodal and mesh equations circuit theorems. The opencircuit voltage that appears across these two terminals is the thevenin voltage. Kirchho s laws 4 a v v 6 v 3 2 i 5 v 0 v i 0 5 r i 4 6 3 i 3 v 4 i 2 2 r 1 v 1 i 1 a b c e d kirchho s current law kcl.
The voltage across the resistor in the circuit of figure 3. We have followed the convention that current leaving a node is positive. Convert documents to beautiful publications and share them worldwide. Thevenin equivalent circuit any twoterminal linear network, composed of. Wir benutzen unsere methode aus dem vorangegange nen kapitel. Scribd is the worlds largest social reading and publishing site. The circuit has both independent and dependent sources. Thevenin s theorem is a very important and useful theorem. Thevenins theorem introduction thevenins theorem is a very important and useful theorem. Lutilisation des seules lois des mailles et des noeuds nous conduit.
Pdf a new method for finding the thevenin and norton. Publishing platform for digital magazines, interactive publications and online catalogs. Above this current, the supply behaves erratically and consequently cannot be considered a linear device in this current range. R th is the input or equivalent resistance at the terminals when the sources are turned off. Thevenins resistance is the ratio of this source voltage to its current, as marked in fig. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. It reduces the need for repeated solutions of the same sets of equations. The thevenin equivalent resistance is the resistance. To draw your new equivalent circuit follow these steps. A is more suitable for graph containing denpendent source. Pdf the paper presents a new pedagogical method for finding the thevenin and norton. In these cases, we need to find open circuit voltage and short circuit current to determine nortons and also thevenin s equivalent circuits.