Re: [TCML] Nothing like first light

[Finn Hammer <f-h@xxxx>]

bartb skrev:
> Ok, so 2X following the first ringdown. Your topology is to use the 
> sidac's as an open circuit with a DC charging circuit that is slightly 
> less that the full string, at which point you can trigger the SCR to 
> gate the IGBT? Are the sidac's ever conducting? Would the top sidac 
> also serve as a safety gap of sorts?
>
> Forgive all the questions, just trying to understand the circuit.
>
> Thank you,
> Bart
Yes.
Up to 530 Volts out of the capacitive voltage doubler, for first ringdown.
All following ringdowns are up to 1060 volts.
(Ideally. Grid variations and stiffness of supply apply)
Only the top half Sidac is conducting, together with the SCR.
Exept if I set the initial voltage to above 540Voolts, in which case the 
tank caps gets recharged to above 1080 Volts: the breakdown voltage of 
the whole Sidac string.
In that case, they all fire a series of times @>1200BPS, which brings 
the voltage down, due to the supply sagging.

So the top Sidac takes part in the safety gap action together with the 
rest of the string.

I`m more than happy to answer all questions.

Cheers, Finn Hammer

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