Re: [CAD_CAM_EDM_DRO] Cap voltage rating (was Re: Power supply question.....

dave_ace_me wrote:

> Hi Scott and all,
>
> I've been reading the threads about power supplies and caps and
> transformers and all with great interest.
>
> Seems to me that the preference is Torridoidal transformers and huge
> capacity cap's, but the cap's voltage is not suposed to be lots more
> than the expected voltage of the system. is: if you plan on a 35 volt
> power supply, 24 VAC trans + cap, a 50Volt cap would be good, but a
> 100 Volt cap would actually not be a good choice.
>
> On my 12 supply from my computer, it has 500 volt cap's. it is a
> dual power, 220/110.

This is a switching power supply. The 500 V caps are being charged
directly by the power line, which is doubled for 110 V input. That gives
340 - 370 V DC on the caps. Then, that high voltage is switched by
transistors, and a transformer reduces the voltage and isolates it from
the power line.

Jon