PsPice Simulation

In this experiment, we will use PsPice to determine a circuit's Thevinin and Norton equivalent by using the DC sweep function

first, we need to draw the schematic in the program

Notice that, at the bottom we set up a current source I4 to use as a test current source in-order to determine the Thevinin resistance and the voltage

By using simulation functions in the program
we obtain the graph

When we plot the voltage vs. current graph of the I4 test current source
we can see when the current is 0, we obtain that the voltage value is 10V, which is the Thevinin voltage

Also, the slope of the line we can calculate and we get a value approximately close to 3.33 ohm, which is the Thevinin resistance

Later, we need to determine the Nortoal Equivalent, we can just divide the voltage over resistance we get a value of 3amp

If we add a test resistor inside the schematic and obtain the value. In this case, we added a resistor of 10ohm at the bottom of the schematic, then we compare the values to the Norton and Thevinin equivalent.

This proved that the theoretical value match to the experimental value


Next, we want to determine when is the maximum power disapted in the load resistance
we first need to set up a simple circuit at shown above, and change the load resistance into an arbitary value that we can use the sweep function to test when the value is maximum

A crucial point need to declare is that when we set the starting value of the sweep function of the resistor, we cannot start with a value of 0 because we would be dividing number with 0. Thus, one way to sovle it is to enter a really small number that is close to 0

We can approximate that when the RL value equals to the R_thevinin, the power graph will have a maximum

This implies that the theoretical values match the experimental values again