Re: PFC question

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Mike Tucknott by way of Terry Fritz <teslalist-at-qwest-dot-net>" <michael.tucknott-at-virgin-dot-net>

Hi .....

Just one point, if you ballast a pole pig with an inductive load, will the
addition of
PFC`s affect this, also what will be the effect on current usage when using
a variable
ballast.

Comments......


Cheers Mike tucknott



----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, May 30, 2003 11:45 PM
Subject: Re: PFC question


 > Original poster: "Jeremy Scott by way of Terry Fritz
<teslalist-at-qwest-dot-net>" <supertux1-at-yahoo-dot-com>
 >
 >
 > Normally without a PFC, maximum voltage and
 > maximum available current are out of phase in the
 > secondary. So, at any given point the average 'power'
 > level from the secondary is less than what you put
 > into the primary due to the properties of the
 > transformer core. That energy is usually lost as heat.
 > A PFC capacitor will start to discharge through the
 > primary when the AC line voltage starts to drop from
 > it's peak. The PFC therefore 'delays' the collapse of
 > the field around the core. The effect is that current
 > and voltage in the secondary are still not in phase,
 > but their peaks are 'aligned'. Since the capacitor
 > helps maintain core saturation, less power is required
 > from the wall, and what you get out is usually 95% of
 > what you put in.
 >
 >
 > --- Tesla list <tesla-at-pupman-dot-com> wrote:
 >  > Original poster: "Richard W. by way of Terry Fritz
 >  > <teslalist-at-qwest-dot-net>" <potluck-at-xmission-dot-com>
 >  >
 >  > Hi everyone,
 >  >
 >  > I've played with PFC a bit but not much. I had added
 >  > 100uf to a 15/30 NST
 >  > and noticed a marked decrease in the primary current
 >  > by means of an ammeter
 >  > in series with the primary. I loaded the secondary
 >  > with a water resistor
 >  > but hadn't a means to monitor the secondary output
 >  > current, just didn't
 >  > know how.
 >  >
 >  > Anyway, will adding PFC to the primary side also
 >  > decrease the secondary
 >  > output current?
 >  >
 >  > Thanks!
 >  >
 >  > Rick W.
 >  >
 >  >
 >
 >