Re: OT Vent Axia fans
- From: Prepair Ltd <prepair@xxxxxxxxxxxxx>
- Date: Mon, 04 Jul 2005 15:40:53 +0100
On Mon, 4 Jul 2005 12:41:23 +0000 (UTC), "Andrew Mawson"
<andrew@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>Anyone happen to know how the speed controller works on a Vent Axia
>fan? I have a 9" fans that has died, or maybe it's contoller has died.
>When turned on the fan will jerk in a direction set by the controller
>but not continue even if spun by hand.
>
>The fan seems to have 2 windings connected in series, both of which
>measure out ok on a meter, and also if I flick the fan they both
>generate emf, so I suspect the motor is ok. Boths ends of the series
>coils, and the centre tap go to the controller.
>
>The controller has apparently no active components, just a block whose
>shape implies a transformer, and switching for air direction and three
>speeds.
>
>I presume that the controller somehow gives a phase shift to one of
>the coils, and direction is govened by which lags and which leads, but
>with no capacitors in it I don't see how it generates the shift.
>
>Anyone got a clue how these things work?
>
>AWEM
>
>
We have a working controller at home, I think it has the four-pin
special plug on it for the larger fans.
If you want to borrow it, I can bring it in to the factory tomorrow
and post it down to you.
Peter
--
Peter A Forbes
Prepair Ltd, Luton, UK
prepair@xxxxxxxxxxxxx
http://www.prepair.co.uk
.
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