Hi,
I am currently working on a digital/solid state power factor meter circuit, that would give an output voltage proportional to the power factor.
This would be done by first squaring the ac voltage so that a constant voltage is obtained, and then filtering the harmonics so that only the fundamental frequency is passed. this resulting voltage will be switched at the positive half cycle of the current waveform (attainable by squaring the current, which drives the gate).
in theory, the integration/average of the switched voltage should be proportional to Vsq*cos(phi), where Vsq is the constant voltage and cos(phi) is the power factor.
As such i require a circuit whose output is the average of the switched voltage.
Any help in what type of circuit im looking at would be great too. Using a RC circuit gives me a phase shift which makes me loose the objective of my design.
Thank you
I am currently working on a digital/solid state power factor meter circuit, that would give an output voltage proportional to the power factor.
This would be done by first squaring the ac voltage so that a constant voltage is obtained, and then filtering the harmonics so that only the fundamental frequency is passed. this resulting voltage will be switched at the positive half cycle of the current waveform (attainable by squaring the current, which drives the gate).
in theory, the integration/average of the switched voltage should be proportional to Vsq*cos(phi), where Vsq is the constant voltage and cos(phi) is the power factor.
As such i require a circuit whose output is the average of the switched voltage.
Any help in what type of circuit im looking at would be great too. Using a RC circuit gives me a phase shift which makes me loose the objective of my design.
Thank you