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Re: Capacitor voltage - AC or DC
- To: tesla@xxxxxxxxxx
- Subject: Re: Capacitor voltage - AC or DC
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Sat, 27 Aug 2005 21:57:43 -0600
- Delivered-to: chip@pupman.com
- Delivered-to: tesla@pupman.com
- Old-return-path: <vardin@twfpowerelectronics.com>
- Resent-date: Sat, 27 Aug 2005 22:02:25 -0600 (MDT)
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Original poster: Mddeming@xxxxxxx
In a message dated 8/27/05 10:41:58 P.M. Eastern Daylight Time,
tesla@xxxxxxxxxx writes:
Original poster: Terry Fritz <vardin@xxxxxxxxxxxxxxxxxxxxxxx>
Hi,
Somehow, someday, somebody, has to do something... :-))
Probably the "last unknown" of MMCs is how long the (CD 942C20P15K)
will tolerate say 60Hz at 6000Vp-p....
Maybe do a bunch of different voltages to make a nice graph of
'lifetime vs. over voltage'...
That would tell us all we still want to know...
Cheers,
Terry
Hi Terry,All,
To get a meaningful number, we would need to look at the
distribution of lifespans of, say, 6 to 10 caps at each voltage. This
would also result in some QC data for the "identical" caps. Soon as I
free up ~$200 I will be happy to kill some some caps for science. My
gut feeling is that higher voltage = both shorter lives AND narrower
distribution of lifetimes. It will be fun to find out. Thirty caps at
each voltage would provide really statistically significant numbers.
Maybe 3 people testing 10 caps at each voltage, or 5 people testing 6
at each voltage?
Matt D.