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Quick questions about PFC calculations
Original poster: Mike <megavolts61@xxxxxxxxx>
Hi all,
I've never worried about power factor correction in a NST powered
coil, but I got this great lil 9/30 (Thanks again Hal) and thought it
might be cool to run it from my car via a 400W inverter that I
have. I know the inverter would not like an inductive load. The
instruction said I should probably run a resistive load at the same
time if it acted up, but I would think power factor correction would
be the way to go.
My question is: Did I calculate this cap correctly? First I
get 270VA/120V = 2.25 A, then dividing 120 by 2.25 and get 53.333
ohms. Now measure the resistance across the primary I got 2.2 ohm
so I assumed the impedance due to the inductance is 51.1 ohm...the
difference between the calculated and measured. Then using XL -
Xc = 1/(2*pi*60*51.1) I got 49.7 uF.
Am I on track here? I am assuming the cap would go parallel to
the input, but please correct me if I am mistaken here(thinking anti
rsonant LC circuit).
Thanks,
Mike
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