PRESENTATION ABOUT

THEVENIN’S THEOREM ,MESH ANALYSIS,

AND SINE WAVE.

Content of my presentation:

1.Thevenin's Theorem2.Thevenin's Step3.Example of Thevenin.4.what is Mesh analysis.5.Things you have to remember

for mesh analysis. 6.process of mesh analysis.7.Example of mesh analysis.8.Basic about sine Wave.

A French Engineer, ML Thevenin , made one of these quantum leaps in 1893. Thevenin’s Theorem is not by itself an analysis tool, but the basis for a very useful method of simplifying active circuits and complex networks because we can solve complex linear circuits and networks especially electronic networks easily and quickly.

The theorem says that ,”Any combination of voltage sources, current sources and resister can be simplified by a single voltage source and a single resister.”

THEVENIN'S THEOREM:

Thevenin Steps:

UsiNG Thevenin we have to find out theRth and

the Vth of the Circuit.For getting Rth we have to remove RL from the circuit and turn off Independent sources from the circuit.And for getting Vth from the circuit, theindependent sources will be back and we have to apply any analysis for getting voltage.

Example of Thevenin

Find the Thevenin equvalent for the Circuit.

Vth:

The Thevenin equivalent circuit

• Mesh analysis (or the mesh current method) is a method that is used to solve planar circuits for the currents (and indirectly the voltages) at any place in the circuit. Planar circuits are circuits that can be drawn on a plane surface with no wires crossing each other. A more general technique, called loop analysis (with the corresponding network variables called loop currents) can be applied to any circuit, planar or not. Mesh analysis and loop analysis both make use of Kirchhoff’s voltage law to arrive at a set of equations guaranteed to be solvable if the circuit has a solution.Mesh analysis is usually easier to use when the circuit is planar, compared to loop analysis.

What is mesh Analysis..

PROCESS OF MESH ANALYSIS.

Identify every mesh in the

Circuit.

Label each mesh with a mesh

Current.

It is recommended that all mesh

current be labeled in the same

direction.(clock wise)

THINGS YOU HAVE TO REMEMBERFOR MESH ANALYSIS.

VAPPLY KVL TO EACH OF THE N MESHES. USE OHM’S LAW

(V=IR) TO EXPRESS THE VOLTAGES IN TERMS OF THE MESH

CURRENTS.

V SOLVE THE RESULTING N SIMULTANEOUS EQUATIONS TO

GET THE MESH CURRENTS.

EXAMPLE OF MESH ANALYSIS

For the circuit in find the branch currents using Mesh analysis.

Basic About Sine Wave

Click to add text

Instantaneous value: The magnitude of a waveform at any instant of time; denoted by lowercase letters (e1, e2). Peak amplitude: The maximum value of a waveform asmeasured from its average.Peak value: The maximum instantaneous value of a function as measured from the zero-volt level.Peak-to-peak value: Denoted by Ep-p or Vp-p, the full voltage between positive and negative peaks of the waveform, that is, the sum of the magnitude of the positive and negative peaks.

Period (T): The time interval between successive

repetitions of a periodic waveform , as long as

successive similar points of the periodic waveform

are used in determining T.

Cycle: The portion of a waveform contained in one

period of time.

Frequency ( f): The number of cycles that occur in

1 s.