PSN-L Email List Message
Subject: Re: How many volts ?
From: Brad Douglas rez@..................
Date: Wed, 13 Jun 2007 12:34:00 -0700
I gave the best answer with the information I had. I'm not terribly
familiar with the hardware you're discussing. I thought you were
talking about an inductor, not a transformer. :-)
Transformers are simple ratios. For example, let's say we have a
(secondary coil:primary coil) 10:1 (step-up) transformer plugged into a
USA wall socket. That would yield a result of 1200V (10/1 x 120V).
A step-down transformer with the same properties as above (except a 1:10
ratio) would yield 12V (1/10 x 120V).
Am I getting closes to what you want?
On Wed, 2007-06-13 at 07:46 -0700, Geoffrey wrote:
> You are talking BEEP School, But its more like
> 2 turns = 2X V and 4 turns is 4X V or something
> along those lines.
> Im talking Transformer design and not this stuff.
> But P=I^2R would tell you the copper losses
> and for max power transfer the Z in must equal the Z out.
> ----- Original Message -----
> From: "Brad Douglas"
> Sent: Tuesday, June 12, 2007 21:53
> Subject: Re: How many volts ?
> >E = I x R
> > E = volts
> > I = current (Amps)
> > R = resistance (Ohms)
> > There may be a reactance phase shift from the coil/magnet that may or
> > may not need to be taken into account.
> > Hope that helps.
> > On Tue, 2007-06-12 at 03:18 -0700, Geoffrey wrote:
> >> There are formulas for figuring out voltages and turns
> >> and magnetic fields such as design formulas for
> >> transformers since most power today is AC.
> >> But it has been so terribly long ago that I ever
> >> did such things I can no longer tell the technical detales.
> >> Plain Old Physics should have an ideal kind of law
> >> that will answer your questions without being exact
> >> but give you an excellent idea of what to expect.
> >> The internet is the best place to start looking
> >> but out there is some mathematician/physicist that would love
> >> to share his knowledge with you.
> >> Possibly an old Electronics book that deals with such things
> >> as designed for understanding by a layman/noobe.
> >> Mathematicians must account for all units etc. but i think
> >> for a laymen experimentation and curve tracing can
> >> give you good results so long as the goes ins and outs
> >> are close enough for government work.
> >> Simply matching a math curve to the data points found
> >> so you put in the known to get the unknown without
> >> knowing what goes on in the middle.
> >> Magic Numbers and stuff.
> >> (I just wish i knew a few myself)
> >> ----- Original Message -----
> >> From: "Jón Frímann"
> >> To: "PSN-Postlist"
> >> Sent: Monday, June 11, 2007 05:25
> >> Subject: How many volts ?
> >> Hi all
> >> I got a coil and magnet from Larry today and I was wondering what the
> >> voltage level of the coil is. But the coil is 9000 ohms.
Brad Douglas KB8UYR/6
Address: 37.493,-121.924 / WGS84 National Map Corps #TNMC-3785
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