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On 6/18/18 7:51 AM, Bert Hickman wrote:
Hi Chris,
These are also heavy-duty energy discharge caps, using a kraft
paper-foil dielectric system. The Aerovox PM series are all rated at 20%
voltage reversal, and no self-healing.
The low capacitance and dielectric system for your caps limit their use
to low pulse-rate, very high-voltage applications, such as flash X-ray,
Marx generators, exploding wire, or rock fragmentation work. The
dielectric system will be fairly lossy for lower-voltage oscillatory
applications, and the stored energy is limited for coin shrinking since
work-coil flashover limits maximum cap voltage to 20-25 kV.
Kind of drifting from TC, but I shrink quarters to dime sized at 20kV.
You might be able to get more information by directly contacting the
folks at Aerovox. Unfortunately, many of their energy discharge caps are
custom designs. This often binds Aerovox to non-disclosure agreements
with their customers, preventing them from releasing even basic
capacitor specs...
More TC related.. maybe some discussion about "how to measure" capacitor
properties might be interesting.
You're not going to be able to get #of shot life kind of data, but maybe
you could measure losses.
These days, an Arduino, Beagle, or Rpi might be enough data acquisition
capability to measure a lot of useful component and assembly parameters.
It's been a while since Terry Fritz was making Q measurements with a
digital oscilloscope.