Network Theorem Trainer Model NW-1 is used for verification of the three theorems. They are Superposition theorem, Reciprocity theorem and Compensation theorem. In order to perform these, the trainer has necessary facilities, like variable voltage source, assorted values of resistors, center-Zero current and built in power supplies. Experiments are performed by using patch cords. Study of Superposition Theorem: -
A superposition theorem is an important concept in circuit analysis. It allows you to determine a voltage across a component or a branch current, by calculating the effect of each source in multiple-source circuits, the circuit current from each source can be calculated individually and then algebraically adding each contribution. There are two or more energy sources. Study of Reciprocity Theorem: -
In any system composed of linear impedance, if a voltage source V is applied between any two terminals and the current, I, is measured in any branch, their ratio, called the transfer impedance, will be unchanged if the position of the meter and source are interchanged. The current from the source need not be the same. Study of Compensation Theorem: -
Impedance in a network may be replaced by an ideal voltage source whose generated EMF at any instant is equal to the instantaneous potential difference across the impedance. Specifications:
Voltage source : Variable in the range of ? 1.5 to 15V DC @ 300mA
Fixed +5V DC @ 300mA
Meter : 25-0-25mA analogue current meter
Passive components : Suitable value resistors to perform the above task
Enclosure : The entire instrument is housed in an ergonomically designed Cabinet. Note: It is desirable to have an external Digital Multimeter. |
