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From: "Glenn Garrett"
Subject: Re: 2.5kW-3kW-SMPS-(cheap)-suggestions?
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
Date: Fri, 20 Dec 2002 09:27:59 +1100
NNTP-Posting-Date: Fri, 20 Dec 2002 09:28:03 EST
Organization: Customer of Telstra Internet Direct
This is how the UK manufactured Plason electrofusion units work but with an
isolatiion transformer which is both heavy and expensive. They control the
true RMS voltage into the joint heater and have a timer which is preset for
the particular joint. The switchmode path would be best.
> Then it sounds like (given your energy source is an AC generator) a Triac
> will do the job just fine. Combine with a little circuit to measure true
> RMS delivered and put in a feedback loop (which may very well be a guy
> watching the RMS meter and turning a knob...)
> A SMPS to deliver filtered DC is way overkill.
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