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How to slow down an 240v AC pedestal fan |
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| message from John on 17 May 2004 |
I have a 16" 50 watt 240v 3 speed pedestal fan which works OK but is
realy noisy. Does anyone have any ideas as to how I can slow down to
about 1/4 of its present speed. I realise that there must be some sort
of pole switching but I wondered if there is a frequency changer that
could be used and if so where could I get one from
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| Bob Minchin replied to John on 17 May 2004 |
If you have a variac then you can try reducing the supply voltage. Whislt
the speed is meant to be frequency related, the amount of slip increases
rapidly with reduced voltage.
You could also try a series capacitor but make sure they are at least 240
volt AC continuous working and preferably 400 volt.
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| Dave Plowman replied to G&M on 17 May 2004 |
Not suitable for induction motors.
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| sylva replied to Dave Plowman on 17 May 2004 |
I know this is the case but do you remember the vellerman kit you put
me onto some years back. I lent it to a chap to control a vacuum
cleaner motor, next time I saw him he said he had put it into a
miniature wind tunnel (Brooklands museum i think) controlling a fan
which was either a shaded pole or standard induction motor! I meant to
check up on it but have never been. I imagine it works by forcing a
large slip, so it may get quite hot.
AJH (Andrew Heggie)
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Archived message: How to slow down an 240v AC pedestal fan (UK D-I-Y Home Improvement)
