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What's special about fan speed controllers?
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Cursitor Doom[_4_]
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What's special about fan speed controllers?
On Sun, 28 Jun 2020 19:36:10 +0100,
wrote:
I need to control the speed of a kitchen extractor fan so have been
investigating how best to do it.
Using a phase-control light dimmer seems to be a no-no but I can't see
why except, perhaps, for starting torque - can anyone here explain?
Inductive load maybe.
Switched caps in series seems to be a fairly common technique. There are
lots of cheap(ish) variable speed controllers but I doubt they're
inverter VFDs.
How do the cheap continuously-variable gizzmos like
https://www.ebay.co.uk/itm/Variispee...s/252403438896
work?
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