Re: "Forming capacitors" - means what?
The gradual voltage increase seems just to extend time of the process andtoggle quoted messageShow quoted text
does not seem to buy anything effective. Checking temperature is probably
good thing, but you have to be checking very often and be a damn fast gun to
react to any increase.
It seems to me to be much more effective to have a current source that would
limit current to, say 10 mA, and ram full rated voltage to the cap. If cap
shorts, 10 mA at 450V is below 5W, not enough to destroy anything, and if
cap reforms current will drop. That is how caps are made, in first place,
then reforming can be done in same way.
Current source is quite a simple thing, a power FET on a moderate heat sink,
an opamp and a voltage reference of any kind would do the job.
----- Original Message -----
From: "Mark Gulbrandsen" <firstname.lastname@example.org>
Sent: Sunday, June 22, 2003 8:30 AM
Subject: [TekScopes] Re: "Forming capacitors" - means what?
I use an EICO 1030 variable high voltage bench supply to re-form