RE: copper static SG problems

• To: tesla-at-pupman-dot-com
• Subject: RE: copper static SG problems
• From: "J. B. Weazle McCreath" <weazle-at-hurontel.on.ca> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Sun, 12 Mar 2000 16:03:21 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

At 10:51 AM 11/03/00 -0700, you wrote:
>Original Poster: "Jan Florian Wagner" <jwagner-at-cc.hut.fi> 
>
> 
>But I still don't get it why it slows down when the NST is shorted.
>
>My setup is, from Triac&current limiting times:
>
>220V mains
>  1.4kW heater
>----/\/\/\----+------+----+
>              |      |    |
>             fan    PFC  NST
>              |      |    |
>--------------+------+----+
>
>The PFC is 22uF, a completely matching one (to NST) would have been 26uF.
>
>There is maybe something obvious I'm missing here?
>
> Jan Florian Wagner
> http://www.hut.fi/~jwagner
>
Your schematic shows the problem clearly.  Connect the fan directly across
the mains BEFORE the resistor.  As you presently have it, the current that
the transformer/PFC draws causes a voltage drop across the resistor and as
a result the fan slows down.


73, Weazle, VE3EAR/VE3WZL

Listening: 147.030+ and 442.075+
E-mail:    weazle-at-hurontel.on.ca
           or ve3ear-at-rac.ca
Web site:  www.hurontel.on.ca/~weazle

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