term understanding: voltage reversal.

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Christoph Bohr" <cb-at-luebke-lands.de> 

Hello All.

I came  across something I am no longer sure I understood that right:

In pulse cap data sheets there is usually a point called "voltage reversal".
To say it less technical I understand that voltage reversal causes stress on
the cap and is undesireable if you like longelivity.
But what exactly is this voltage revesal in a AC, sync gap, TC? is it:

1.: The changing polarity of the carging current, i.e. the fact that I once
carge the cap with the one polarity and during the next half sine wave to
the other

or

2.: The changing polarity during the HF-"ringing". As the changes happen
more often and more rapidly here I feel that this is the main voltage
reversal relatet Stress on the cap.

I fear this relates to point 1 and 2 as well. I only hoped that if it was
point 1, one could reduce the stress on the cap by full-wave rectifying the
xformer output to charge the C1. Would this work? I am not talking about a
real DC supply with smoothing and charging inductor, only charging with
pulsed dc to avoid the changing in polarity of the charging current.

Probably I am missing something but the longer I think about it the more
unsure I get...

Maybe some of you guys can explain that to me.

Best regards

Christoph Bohr