Re: MMC resister problem

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

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>



Tesla list wrote:
> 
> Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>
> 
> Hi Gary,
> 
> I too wonder how the commercial caps made from a series of "packs" manage
> to keep the voltages equal.  Having them all enclosed may help some as
> opposed to MMCs with exposed leads with corona.  They could also make the
> oil slightly conductive but I don't think they do.


Recall that in a commercial pulse cap, the packs are very close to being
identical (probably much more so than caps out of a standard manufacturing
bin).

Also, these sorts of things are part of the design optimization (just how
identical are they, how much overdesign do you need to get the rated life,
etc.).. better processes, better understanding, etc., is why you can get
50-60 kJ in a can the size that would only hold 3-4 kJ 20 years ago.