Re: Adding dual-voltage to an SPS?
From: Sam Goldwasser (sam_at_saul.cis.upenn.edu)
Date: 06/29/04
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Date: 28 Jun 2004 20:17:02 -0400
"Ken Taylor" <ken123@xtra.co.nz> writes:
> "DaveC" <me@privacy.net> wrote in message
> news:0001HW.BD05A23C007FA627F02845B0@news.individual.net...
> > I've got a battery charger for a power tool. Input voltage is spec'd at
> only
> > 120 VAC.
> >
> > Is it reasonable to think about modifying the switching p.s. to encompass
> 240
> > VAC as well? Or might one simply design an entire new one more easily (not
> > that I'd even consider doing that...)?
> >
> > What's involved in modifying such a supply?
> Buy a stepdown transformer. Attempting to modify the existing supply is not
> a reasonable proposition unless you know how to design switching supplies.
Only easy solution would be if it already has a doubler/bridge input
with a jumper to select 115 VAC (in) or 230 VAC (out). This would mean
the chipper runs off ~300 VDC. If it runs off of ~150 VDC, probably no easy
solution.
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