"The Phantom" wrote in message
...
On Tue, 22 Jul 2008 23:46:42 -0500, "Tim Williams"
wrote:

I did this. And the more difficult problem of:

Z o---Lm---+---C---+---GND
| |
+---R---+
| |
+---Lw--+
^ ^ ^ ^ ^ ^ ^ ^ ^ ^

The circuit you analyze in the PDF looks like the same one you asked about
in sci.electronic.basics in November or 2005. Didn't that have something
to do with induction heating?

Excellent memory! In fact the one quoted above is specifically my induction
heater output network... the one in the PDF is a simpler network, notably
differing in that Lw -- infinity. If Lw cancels with most of C (which it
does at resonance, except for the amount that Lm takes for itself), then
what's in the PDF is an acceptable model. But that's limited to resonance
only, which is kind of boring.

On the other hand, it works for anywhere you want to look at a
series-resonant tank with R || C...

You've definitely improved your skills with complex algebra in the
meantime. However, in the PDF file, on the first page, around the middle
you show 5 algebraic manipulations. The third one is in error.

Yup, I noticed that just this evening. Transcription error. I had it right
on paper, and I believe correct in ASCII as well. So, blame it on LaTeX...
LaTeX made me do it. :^)

I believe I also have the correct form of the four-element network. I fixed
the error where I was getting a few hundred negative ohms on the complex
plane. :^)

Tim

--
Deep Friar: a very philosophical monk.
Website: http://webpages.charter.net/dawill/tmoranwms