Here I am going to show you how to plot frequency spectrum of differential signal in proteus. This is similar to analyzing and plotting differential signal on oscilloscope in proteus.
But first, what is Differential Measurement?
In electronics and simulation environments like Proteus, differential measurement is a technique used to determine the voltage difference between two specific points when neither of those points is connected to ground. It is essentially measuring the floating potential across a component, such as a 220V AC load or a transformer secondary.
To get frequency spectrum of differential signal, we need to add probes at the two AC output and then use the Fourier graph.
I begin by placing Fourier Graph onto the schematic editor. Then place two probes Va and Vb across the ac output terminals of the inverter output.
Right click on the Fourier Graph and click on Add Traces. Give name to the differential signal like Vout. In the Probe P1 field, select Va and in the Probe P2 select Vb. In the expression field, Write P1-P2 as the expression for differential signal Vout. That is Vout=Va-Vb. The differential signal Vout is automatically added to the Fourier graph.
Make any changes required for the Fourier Graph like stop time, start time. Here I am changing the resolution to 1 because I am measuring 50Hz signal differential signal Vout. Right click the graph again and click on Stimulate Graph and the simulation will start.
If everything is ok, then you will see the frequency spectrum of the differential signal Vout. As shown the frequency spectrum shows the peak magnitude of the Vout signal. Here the peak is at 50Hz, meaning that the frequency of the differential signal is 50Hz which is the expected frequency of the output signal of the inverter.
That's it. This is how you can plot the frequency spectrum of differential signal in proteus.
Thanks for reading. See you in the next.
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