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High current PSU

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HazzWold 1993
Tue Nov 16 2010, 09:02AM
HazzWold 1993 Registered Member #2563 Joined: Mon Dec 21 2009, 10:17AM
Location: Australia
Posts: 280
Not to hijack the thread but is there a limit of when there is too much capacitance in a smoothing cap? or is there better results to be had in using only the calculated amount?
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Tesla Fan
Tue Nov 16 2010, 07:53PM
Tesla Fan Registered Member #3353 Joined: Sat Oct 23 2010, 11:21PM
Location: Greece
Posts: 90
pauleddy wrote ...

you need one of these caps
140000UF 50vdc
Bigcap004



wow, 140.000μF , that could be handy cheesey
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Freitsu
Thu Nov 18 2010, 01:08PM
Freitsu Registered Member #3147 Joined: Sun Aug 29 2010, 10:53AM
Location: Finland
Posts: 56
pauleddy wrote ...

you need one of these caps
140000UF 50vdc
Bigcap004



Could you please send that one to me? rolleyes

Steve McConner wrote ...

The short circuit method will give you an answer about 10 times bigger than the real VA rating. I just go with 100VA per kg weight. smile
I kind of thought the same thing. So almost 1kVA in my case, so far the PSU haven't let me down...
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pauleddy
Sun Nov 21 2010, 04:23AM
pauleddy Registered Member #2909 Joined: Wed Jun 09 2010, 12:31AM
Location: fort belvoir, Va USA ( south of DC)
Posts: 145
Unfortently this is my only one it it is has plans for my own super supply, enless you can give me a great offer or trade. :)
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Proud Mary
Sun Nov 21 2010, 10:02AM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
HazzWold Labs wrote ...

Not to hijack the thread but is there a limit of when there is too much capacitance in a smoothing cap? or is there better results to be had in using only the calculated amount?

There is a very interesting discussion of this very topic in Linear Power Supply Design here:

Link2
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