Speed !!

[D O'Reilly]

I have an electric fan in my bedroom when even on its slowest setting
is far too
powerful,can anyone tell me how to adjust the fan with some sort of
device or switch to lower the rpm's,your help would be most
appreciated.

Dave.

 

[Soeren]

Hi Dave,

I have an electric fan in my bedroom when even on its slowest setting
is far too
powerful,can anyone tell me how to adjust the fan with some sort of
device or switch to lower the rpm's,your help would be most
appreciated.

You might be able to slow it somewhat with a capacitor.

Another way would be to periodically remove a number of full waves of the
mains, like if you were switching it on and off repetedly.


--
Regards,
Soeren

* If it puzzles you dear... Reverse engineer *

 

[Chols]

Wouldn't running at a very slow speed burn the motor?


"Soeren" <Look@iNO-SPAMt.dk.invalid> escribió en el mensaje
news:Xns94EA92699A3EDo8oLOOKatHOMEo8o@212.242.40.196...

Hi Dave,


I have an electric fan in my bedroom when even on its slowest setting
is far too
powerful,can anyone tell me how to adjust the fan with some sort of
device or switch to lower the rpm's,your help would be most
appreciated.

You might be able to slow it somewhat with a capacitor.

Another way would be to periodically remove a number of full waves of the
mains, like if you were switching it on and off repetedly.


--
Regards,
Soeren

* If it puzzles you dear... Reverse engineer *

 

[Soeren]

"Chols" <NOSPAM@NOMESCRIBAS.JARL> wrote in
news:40a65df4_3@news.arrakis.es:

Wouldn't running at a very slow speed burn the motor?

Are you thinking of the reduced air-stream not cooling it enough ?

If the power is on say 1 out of every 5 (full) cycles (or what the motor
needs to go appropriately slow) it would see a proportionally less amout
of power. It might draw a bit more than usual relative to the work done
(less effiency), as it is in a permanent state of "semi start up", but i
seriously doubt that it will burn.
I haven't tried it out myself though, but I will in a month or so, as I
have a large and too fast fan myself, selected from the principle that a
large fan going slow (and silent) moves more air than a small noisy
hispeed thingie.


--
Regards,
Soeren

* If it puzzles you dear... Reverse engineer *