26-05-2020, 12:24 PM
Mark, it's easy to tell that you're a professional educator and I am not:-) You managed it without even mentioning Thevinin.
From the very small amount of work I've done with PFC corrected kit the current pulse is in phase with the voltage but hardly sinusoidal. Just a large current peak around the voltage peak but little or no current for most of the cycle. That's power factor correction within a strict reading of the rules but still a lot of current harmonics.
I did my current measurements with a small resistor in series with mains neutral. I did use an isolating transformer. One day I must acquire a current probe. Not so much for power supply and PFC work as line timebases.
From the very small amount of work I've done with PFC corrected kit the current pulse is in phase with the voltage but hardly sinusoidal. Just a large current peak around the voltage peak but little or no current for most of the cycle. That's power factor correction within a strict reading of the rules but still a lot of current harmonics.
I did my current measurements with a small resistor in series with mains neutral. I did use an isolating transformer. One day I must acquire a current probe. Not so much for power supply and PFC work as line timebases.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
