Re: [TCML] SISG PSU problem

[bartb <bartb@xxxxxxxxxxxxxxxx>]

Hi Herwig,

Herwig Roscher wrote:
> - IMO resonant rise is not a special issue for MOTs but for other 
> trannies as well. Unfortunately I can't select the inductance of the 
> secondary winding of the MOT. I have to accept it as it is. Have you 
> calculated the resonant frequency of your pig/primary cap combination 
> already?
No need. I'm running STR at 0.5 (1/2 the resonant size). Normally, that 
might be a little dangerous in an solid state design if conduction 
failed. However, given the failure mode seen so far (short), it will 
simply fire at a lower voltage which is a neat feature of the SISG since 
it clamps voltage to the quantity of Sidac's working.

> > Given Terry's information about Piranha II, do you plan to do anything 
> > different?
> - I would like to avoid resonant rise in order to protect the MOT but 
> at this moment I do not know how it could be done.

That's not possible if keeping to Piranha II specs. It's in resonant 
charging mode. However, maybe choking out the transients or RC filtering 
would add some peace of mind, but the rise is what it is. Considering 
MOT's aren't too difficult to come by, work them until they die. Who 
knows, they may run fine.

Take care,
Bart
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