Re: 1KV buck converter

On Sun, 25 May 2025 09:35:48 -0700, john larkin <jl@glen--canyon.com>
wrote:

On Sun, 25 May 2025 10:40:54 -0400, legg <legg@nospam.magma.ca> wrote:
>

On Sat, 24 May 2025 10:35:21 -0700, john larkin <jl@glen--canyon.com>
wrote:
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On Sat, 24 May 2025 12:23:52 -0400, legg <legg@nospam.magma.ca> wrote:
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On Fri, 23 May 2025 08:05:28 -0700, john larkin <jl@glen--canyon.com>
wrote:
>

>
https://www.dropbox.com/scl/fi/f64mv46qk4g4nca00bgoe/1KV_Buck.jpg?rlkey=f0qnaliz7nyoowe6w4wx2gkua&raw=1

>
The highest diac rep rate will likely be in the tens of hertz range.
(think cicada)
>
RL

>
Why? Diacs and sidacs turn on in under a microsecond. I can't imagine
them taking milliseconds to turn off.
>
Interestingly, sidacs have been used in series strings up to many
kilovolts, which suggets a kilovolt step-down converter with
diacs/sidacs as the only active components.
>
>

Punch some numbers.

>
Numbers are cheap. 2 nF charged to 1 KV stores a millijoule. Transfer
that at 10 Hz and you get the required 10 mW.
>
The problem is the circuit.
>

Diac section is pretty simple to breadboard.

RL