Re: Power factor (was genset trailer)

["1sclunn" <1sclunn@msn.com>]

Thanks Ill try it again as soon as I figer the motor problem out >
----- Original Message -----
From: "Lee Hart" <leeahart@earthlink.net>
To: <ev@listproc.sjsu.edu>
Sent: Wednesday, July 31, 2002 11:54 PM
Subject: Re: Power factor (was genset trailer)


> Steve Clunn wrote:
> > Thank you Lee, for explaining what I was seeing here. I stopped
> > experimenting with this when I thought it was wasting 1/2 the power.
> > What about combining both non-electrolytic "run" capacitor charger
> > with an isolation step-down transformer type charger with both in
> > parallel... If both were putting out the same amps, would the lead and
lag = out?
>
> Since at least one is isolated (the isolation step-down transformer
> charger), you can connect the chargers in parallel.
>
> And yes, the transformer and capacitor chargers will partially cancel
> out each other's reactance. Not perfectly, unless you went to some
> trouble to have an identical reactance for each.
>
> The capacitor charger's current will have a strong leading power factor
> as discussed previously. The transformer charger's current will be
> mainly in-phase (because a good transformer has minimal inductance), and
> will draw most of its current at the peak of the AC line (a
> characteristic of the bridge rectifier). So, you will be pleasantly
> surprised to find that the actual AC current will be less than the sum
> of these two AC currents.
>
> For example, a transformer charger that draws 10 amps from the AC line,
> in parallel with a capacitor charger that also draws 10 amps, will only
> draw 15 amps when both operated at once. The batteries, however, will
> charge at the full 20 amps (10 amps from each charger). Or 30 amps if it
> is a 2:1 step-down transformer!
> --
> Lee A. Hart                Ring the bells that still can ring
> 814 8th Ave. N.            Forget your perfect offering
> Sartell, MN 56377 USA      There is a crack in everything
> leeahart_at_earthlink.net  That's how the light gets in - Leonard Cohen
>
>