Re: Resistor vs transformer

On 8 Feb 2006 07:32:53 -0800, "lemonjuice" <exskimos@xxxxxxxxxxxx>
wrote:

Haven't thoroughly examined your analysis as I got a tight work
schedule here ... but I'll be back to you tomorrow morning.

---
I see from the rest of your post that you don't understand what's
being discussed, so your "analysis" will hardly be of any
consequence.

Save yourself some grief and concentrate on your work, it'll
probably serve you better in the long run.
---

In the meantime ... the secondary is left unconnected in the
application so flux induced there, currents flowing there have nothing
to do with the problem.

---
had you taken a little more time to read my post, instead of firing
back some half-baked, irrelevant response, you would have seen
(well, maybe...) that that eventuality had already been covered.
---

Then you are assuming wire radius and type is constant which isn't
necessarily true for different transformer types and that is going to
vary all the impedances, flux you have calculated.

---
Again, had you read the article with a little more care you might
have found that the discussion was based on using Sloman's example
of a transformer with a couple of 120V primaries being used as an
autotransformer, and that my examples were all based on using that
transformer's core in order to keep apples equal to apples.
---

You also assume A 240V has to have twice the windings of the 120V and
that depends on what the transformer is designed to do. It doesn't
always have to be like that, especially if you are considering
different transformer types.

---
Read my post again. And again, and again, until it makes sense to
you, if you can, then come back with any question you may have.
---

Even across the same types you could use a 240V dual to whatever
voltage you want with a 120V to a lower voltage and you'd have the same
resistence of the primaries.

---
Flux density, voltage, and primary turns is what we're talking
about, dear boy.

Besides, the resistance of identical primary windings in parallel is
going to be half that of the same primaries in series, you know.
---

I see you mentioning regulation. It only makes sense to talk about that
if you have an output voltage . In this case our secondary is left
unconnected.

---
I suppose, then, that the voltage being fed into the load (which is
taken from one of the autotransformers' primaries) doesn't really
qualify as an output because there's no secondary?

Go back and read the article again before you embarrass yourself
further.


--
John Fields
Professional Circuit Designer
.

Relevant Pages

  • Re: Serious transformer problem
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  • Re: Serious transformer problem
    ... Off load primary current at rated voltage is a good ... didn't make any difference in either transformer. ... ** As I said before " Such transformer primaries have very large and NON ... The actual value of the impedance will in part depend on just how neatly ...
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  • Re: Resistor vs transformer
    ... since the voltage across the primary and the voltage across the ... The transformer I refer to later on was not the step-down ... secondary to feed a 6 watt load. ... dual 120V primaries and connect them in series so we can use it as ...
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  • Re: Resistor vs transformer
    ... device connected in parallel across the primaries causes the ... Using the scheme with a transformer with dual 240V secondaries ... Winding resistence doesn't depend ONLY on input voltage range. ...
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