Question

How do you calculate the Norton equivalent current?

Answer 1

To calculate the Norton equivalent current of a linear electrical network, you can follow these steps:

Determine the Load Resistance (RL): Identify the load resistor for which you want to calculate the Norton equivalent current. This resistor might be connected across two terminals of the network.

Disconnect the Load: Temporarily disconnect the load resistor RL from the circuit. This will create an open circuit at the load terminals.

Calculate Open-Circuit Voltage (Voc): Determine the voltage across the open load terminals (where RL was connected) using whatever circuit analysis techniques are appropriate for the network. This voltage is referred to as the open-circuit voltage (Voc).

Find Short-Circuit Current (Isc): Short-circuit the load terminals (where RL was connected) and calculate the short-circuit current flowing through the terminals. This current is referred to as the short-circuit current (Isc). You may use circuit analysis methods such as nodal analysis, mesh analysis, or other relevant techniques.

Norton Current (INorton): The Norton equivalent current (INorton) is equal to the short-circuit current (Isc) calculated in the previous step.

So, the Norton equivalent current (INorton) is simply the short-circuit current (Isc) that you calculate when the load resistor RL is short-circuited.

In summary:








=



I
Norton
    ​

=I
sc
    ​


Keep in mind that the Norton equivalent current and voltage sources can be used to simplify complex linear circuits into a single current source and a resistor connected in parallel. This simplification can make circuit analysis easier for certain applications.

Also, make sure you have a good understanding of circuit theory and analysis techniques before attempting to calculate Norton equivalents.