Re: transformer for power supply

Thomas:

Just a note to remind you that I assumed you have 115VAC available.

Feel free to contact me off-list if you need more help.

Tony

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Thomas Powell" <tppjr@h...>
wrote:

> I have received some great responses and am satisfied. Don't think

that I

> asked again. For whatever reason it took SEVERAL days for my

question to

> post the first time. The second posting was actually the first one

I posted

> to the list which got lost somewhere.
>
> I think I will go with Tony's suggestion and get 75V at 13A,

perfect for a

> gecko.
>
> BTW, will Mach 2 support gecko drives?
> ==============================================
> Thomas Powell (VMOA 741)
> 1994 NOS injected T-Boost sales
> Tourmaster V-Max Clear clutch cover sales
> "LAFGAS" Handlebar brackets
> Contact me at: tppjr@h...
> http://imageevent.com/tppjr (photopage)
> ==============================================
>
> ----- Original Message -----
> From: "Jon Elson" <elson@p...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Wednesday, October 01, 2003 7:48 PM
> Subject: Re: [CAD_CAM_EDM_DRO] transformer for power supply
>
>
> >
> >
> > Thomas Powell wrote:
> >
> > >With the following speced toroidal transformer what DC power

supplies are

> > >possible?
> > >
> > >115/230 Volt, 50/60Hz Output: 20 VAC @ 10 AAC 118 VAC @ 13 AAC
> > >
> > >I will be inputting 220.
> > >
> > >What will the AAC rating be for DC?
> > >
> > >
> > That information is not clearly indicated in the description.

Some

> > transformers
> > are rated as "control transformers", and expect a resistive

load. So

> > you'd get
> > 10 Amps only to a resistive load, and maybe somewhere in the

neighborhood

> of
> > 6 A into a capacitor-input filter (that is the official term for a
> capacitor
> > immediately following the rectifier). I'm assuming you want to

use this

> > as a
> > 28 V power supply. In that case, you could probably get more

wattage, as

> > the major winding (the 118 V one) would not be used. But, I

can't tell,

> > as the 20 A AC spec is really no spec at all. What is the duty

cycle?

> > 10% or continuous? What is the environmental spec? Forced air

cooling,

> > or a sealed box at 50 C? What is the output spec, cap input

filter,

> > resistive
> > or other?
> >
> > As for voltage, as I said yesterday, you could get 28 V DC from

the 20 VAC

> > winding, 167 V DC from the 118 V AC, or 139 V DC by using the 20 V
> > winding to buck part of the 118 V winding.
> >
> > Again, you don't tell us what you are looking for, so it is very

hard

> > to answer such questions.
> >
> > Jon
> >
> >
> > Addresses:
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