Re: [TCML] DRSSTC weird waveform behavior

[Michael Twieg <mdt24@xxxxxxxx>]

On the topic of that 100K resistor... why is it desirable for the zero cross
comparator to start with the same output every drive cycle?  Shouldn't
matter at all, as far as the sparks are concerned.  If anything, it just
increases the likelihood of the GDT saturating (unless you have a DC
blocking capacitor on the primary).

-Mike

On Mon, Jul 4, 2011 at 2:55 PM, Bart B. Anderson <bartb@xxxxxxxxxxxxxxxx>wrote:

> Regarding the Excel spreadsheet for the UD2. Note item 9 should be
> UCC27423D (8-SOIC package), not UCC27423DGN (8-MSOP-PowerPad). Minor thing
> but it is nice to get the right part the first time.
>
> BTW Steve, that 100k across C5 really helped my feedback for my DRSSTC! I
> also ended up at 2 ohm on the gate in the end. Thanks for the help! Hope to
> have some 4th of July fun tonight!
> http://www.flickr.com/photos/**bart-coils/5877441485/in/**photostream<http://www.flickr.com/photos/bart-coils/5877441485/in/photostream>
>
> Take care,
> Bart
>
>
>
> On 7/3/2011 12:36 PM, Steve Ward wrote:
>
>> After seeing Finn's "Prediktor" controller use the lead compensator so
>> nicely, i developed my own, though have yet to publish it in any formal
>> way:
>>
>> http://www.stevehv.4hv.org/**leadcomp/UD2_1revB/<http://www.stevehv.4hv.org/leadcomp/UD2_1revB/>
>>
>> And now the switch timing can be controlled much better, allowing the IGBT
>> turn on to happen really at zero current, which keeps the wheeling diode
>> recovery from causing big voltage transients.
>>
>> Steve
>>
>>
>>
>>
>>  Fra: Justin B<boshjack@xxxxxxxxxxx>
>>>>> Til: TCML<tesla@xxxxxxxxxx>
>>>>> Dato: Lør, 02. jul 2011 22:49
>>>>> Emne: RE: [TCML] DRSSTC weird waveform behavior
>>>>>
>>>>>
>>>>> Just giving an update to progress.
>>>>>
>>>>> currently, I have an inductor and resistor (1ohm - 100K) in parallel
>>>>> with my CT. Turning the potentiometer, does nothing at all. However,
>>>>> the inductor has helped. If any one can give feedback as to what im
>>>>> doing wrong with this POT, please let me know. because it does
>>>>> NOTHING. The pot is in working condition.
>>>>>
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>
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