>
>
>-----Original Message-----
>From: nospam4me@juno.com <nospam4me@juno.com>
>To: amps@contesting.com <amps@contesting.com>
To: <amps@contesting.com>
>Date: 24 May 2001 06:48
>Subject: [AMPS] re: Dayton and Emtron
>
>>The capacitors were also mounted right next to each other.
>>Cap cooling is something less than desired. In my opinion,
>>an issue that should be looked at. Although I wasn't able
>>to check the values, the capacitor bank looked "rather light
>>duty" for the power supply level so these close spaced caps
>>will get at least very warm with significant ripple current.
>
>
>This got me thinking, and I wonder if we are overly pessimistic about
>electrolytics, maybe based on the poor quality components of the past.
>
>Based on a 3kV supply with a stack of 10 x 330u 450V ordinary (not special
>computer grade) 85C caps, rms ripple current rating is 1.5-2A (depending on
>brand) with dissipation about 2W at maximum ripple. 2W doesn't seem a huge
>amount for the size of can to dissipate.
>
? In a bench-top experiment, I discovered that fan cooling
electrolytics is Not a bad idea.
cheers, Steve.
- R. L. Measures, 805.386.3734, www.vcnet.com/measures.
end
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