Re: RE: [TCML] DRSSTC weird waveform behavior

[Tuomas Koivurova <tkoivuro@xxxxxxxxx>]

You were right, i was thinking something else :)

Im currently using Steves first UD with crude phase lead trick i
described earlier. (clipping diodes in place, 470R pot + 30µH
adjustable inductor as burden)

Seems to be working. So far tested 324VDC but i will step it up to
565VDC next weekend when i get to 3phase outlet :)






2011/7/4 Michael Twieg <mdt24@xxxxxxxx>:
> I think maybe what I'm saying isn't coming across cleanly.  Here's a
> schematic of my zero crossing detector:
> http://i.imgur.com/sIzSI.png
> There is a fixed resistance (20 ohm) in series with a fixed inductance
> (33uH).  At my operating frequency (~33KHz) this alone will give way to much
> phase lead (18.9 degrees, or about 1.6us).  By putting an adjustable
> resistance in parallel with the inductor I can change that phase.  With a 25
> ohm fixed resistor and a 0-25 ohm pot, I get a range of 0-12 degrees in
> phase shift.  The potentiometer should have a low wiper resistance if small
> phase leads are desired.
>
> -Mike
>
>
>
> On Sun, Jul 3, 2011 at 3:07 PM, Tuomas Koivurova <tkoivuro@xxxxxxxxx> wrote:
>
>> For some reason i didnt have much luck with just variable resistor.
>> You can get very good adjustable inductors from coilcraft ( model SLOT
>> TEN-5-09 ). These inductors have both heavy magnetic and electrostatic
>> shielding which is really nice thing in violent environment like tesla
>> coil driver :)
>>
>>
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla