[ARC5] AC Motor Start Caps as Filters

[Bobby Drummond]

I would agree about AC ratings versus DC ratings. That is true about many
other capacitors at least.  One thing though to remember about them is some
are made for more "intermittent" duty and some are meant for continuous
duty (as in "start" capacitors and "run" capacitors.

As far as for use in DC power supplies, I am not sure.  Could be
interesting though if they could be used.  Might be a handy alternative if
they are OK in DC power supplies.



On Mon, Mar 23, 2020 at 10:21 PM Roy Morgan <k1lky68 at gmail.com> wrote:

> I remember a report quite some time ago now from a fellow who spoke in
> person with an engineer at a manufacturer and asked about the dc rating of
> such capacitors. The engineer laughed and said the practical dc rating
> would be something like four times the peak of the rms ac rating.
>
> Roy
>
> Roy Morgan
> K1LKY Western Mass
>
> On Mar 23, 2020, at 10:03 PM, Robert Eleazer <releazer at earthlink.net>
> wrote:
>
> I was helping a friend troublshoot a 7.5 hp AC motor ... that the start
> caps were 1200 mfd at 125V, in series.
>
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: https://www.qsl.net/donate.html



-- 
73 de AK4JA
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20200323/94a796b5/attachment.html>