Dear all,
I'm trying to do a power factor measurement for academic work. I'm using the zero crossing detection on the voltage and the current so that I can do the difference between then and convert to angle.
Using the Op-Amp 741 as a voltage comparator I'm not able to get the phase wave of the current. It gives me the same result as the voltage.
I'm using a transformer in serie with the circuit as well as a current transformer but it gives no phase difference.
I'm attaching the printscreen of my circuit and my result as well.
Kind regards.
