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Power Factor Correction
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To: mail11:;-at-cimcad.enet.dec-dot-com (-at-teslatech)
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Subject: Power Factor Correction
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From: I am the NRA <pierson-at-cimcad.enet.dec-dot-com>
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Date: Mon, 21 Nov 94 19:28:25 EST
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>Received: from inet-gw-1.pa.dec-dot-com by csn-dot-org with SMTP id AA16308 (5.65c/IDA-1.4.4 for <tesla-at-grendel.objinc-dot-com>); Mon, 21 Nov 1994 17:32:06 -0700
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Cc: pierson-at-cimcad.enet.dec-dot-com
>Do you use the caps in parallel to nullify the inductance?
Yup. (You are, so to speak, resonating the transfomer on the line side)
>If so, then I guess one way to do this would be to look at the current and
>the voltage going into your (neon sign) transformer and adjust the capacitance
>so there is no current lag or lead compared to the voltage??
Yup. Or minimizing it.
>What other ways are there to check this that don't need a dual trace
>oscilloscope and a current probe?
One could cut and try into it if one had an AC Ammeter. PF will be
correceted when current is _minimum_. But, franly, for a neon sign
size coil, i would not bother. I would put the time/money into
the gap, i think, or other places...
Maybe for a "pole pig" size coil.
regards
dwp