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Nathan Leon
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Posted: Tue Sep 1st, 2009 06:17 pm |
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I did not mark the wiring when I took it apart. I have an AC motor with three wires, a capacitor, a switch, and someting like a paper resitor or thermal switch (not sure what it is).
Can someone explain what the mystery component is and how to wire this fan with a good description or diagram?
I work with digital electronics and I think I fell asleep during AC motor theory.
Westinghouse sent me here for help :)
Nathan
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Rob Duffy
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Posted: Tue Sep 1st, 2009 06:27 pm |
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| The paper "thingy" might be a speed coil which is used to get different variations in speed. Could you post a picture of your fan?
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Nathan Leon
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Posted: Tue Sep 1st, 2009 06:33 pm |
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| Attached is a picture of a similar fan, but I do not have the dial switch and my motor is round. When I get home tonight I will get pictures of the fan and post them. I was thinking it had something to to do with speed as well. Attached Image (viewed 250 times):
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Rob Duffy
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Posted: Tue Sep 1st, 2009 06:39 pm |
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| That is an older Westinghouse MobilAire with the hexagon motor. You must have the newer slim type which is also a good one. These things move a lot of air. As for wiring, I don't know how much help I could be. Are the wires color coated?
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Nathan Leon
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Posted: Tue Sep 1st, 2009 06:45 pm |
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From the motor, one red, one black, and one I did not notice the color. I am thinking this is an inductive ac motor with a capacitor start. I will get close-ups of the parts and wiring tonight. I searched the net for a diagram specific to my fan, but no luck. Now I am looking for a diagram for AC fan motors in general to get an idea of how to reconnect the wires.
Thanks for your replies.
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Rob Duffy
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Posted: Tue Sep 1st, 2009 06:51 pm |
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Nathan Leon wrote: From the motor, one red, one black, and one I did not notice the color. I am thinking this is an inductive ac motor with a capacitor start. I will get close-ups of the parts and wiring tonight. I searched the net for a diagram specific to my fan, but no luck. Now I am looking for a diagram for AC fan motors in general to get an idea of how to reconnect the wires.
Thanks for your replies.
The fan is probably a PSC motor as they are common. These are capacitor ran motors and efficient as well.
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Nathan Leon
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Posted: Wed Sep 2nd, 2009 05:25 pm |
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I have a 3-way switch, a capcitor, and something like a resitor and 3 wires to the motor.
Anyone have a thought on how to wire it back together?
Thanks
Nathan
Attached Image (viewed 223 times):
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Mike Salvatore
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Posted: Mon Sep 28th, 2009 12:28 pm |
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Nathan. doe your Mobile aire have a round motor,with a upright support
where the Cap is in a holder? if so i have a fan that has your setup also.
as soon as i get a chance,before i put it away for the season, i'll check the
wiring on mine.
mike salvatore
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Nathan Leon
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Posted: Mon Sep 28th, 2009 04:07 pm |
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| Thanks for the reply, but I got it back together and it works great and it is improved becaused I replaced the flat coil thing that slowed the fan down and generated heat with a modern day dimmer switch. I was able to trim it down and fit it inside the capacitor canister with the rotary switch pertruding through a drilled hole. Now the low speed is adjustable and no heat generated. Here is the schematic. My wife's project for me is now complete, so back to riding my bike. Attached Image (viewed 135 times):
 Last edited on Mon Sep 28th, 2009 04:16 pm by Nathan Leon
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Mike Salvatore
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Posted: Mon Sep 28th, 2009 07:54 pm |
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be careful using a dimmer. they are made for resistence loads of a light bulb filament. not for a inductive load of a AC motor. you may end up cooking the CAP or the dimmer itself. i would watch it closely for a while. that is why FAN speed switches that are wall mounted have special components and they state to leave the built-in fan speed switch on HIGH. the harmonics of the electronics play havic with the windings. causing humming noises and vibrations in the coils.
mike
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Nathan Leon
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Posted: Mon Sep 28th, 2009 08:39 pm |
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| I was wondering about that. Supposedly this dimmer uses a pulse technology that is different than the old reostat type, but I do not know the impact to the coils. Since I was concerned about it, I set the low speed more to the medium side. I have ran it for several hours at a time and I have not noticed any heat. I did notice the humm when the switch is turned down too low which inspired me to keep it above the humm barrier. Since the speed is not user adjustable, I think it will be OK, but I will let you know if it all goes up in smoke.
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RJ Kanary
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Posted: Tue Sep 29th, 2009 01:39 am |
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Oddly enough..........I have the remains of a husky 20 inch box / roll about fan marketed under the Kenmore label.It possessed up until it's death due to aluminum paint inhalation a one-sixth HP Westinghouse / AO Smith PSC motor.
It was electrically reversible,themostatically controlled and had two speed settings.HIGH and Variable.Interestingly enough, it used a lamp dimmer to control the variable speed.The control had ratings for both tungsten and inductive loads.
If operated slowly enough it would 'honk' also.Just like the 48 inch Dayton ceiling fan in the shop.
RJ
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Rob Duffy
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Posted: Tue Sep 29th, 2009 01:40 am |
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RJ Kanary wrote: Oddly enough..........I have the remains of a husky 20 inch box / roll about fan marketed under the Kenmore label.It possessed up until it's death due to aluminum paint inhalation a one-sixth HP Westinghouse / AO Smith PSC motor.
It was electrically reversible,themostatically controlled and had two speed settings.HIGH and Variable.Interestingly enough, it used a lamp dimmer to control the variable speed.The control had ratings for both tungsten and inductive loads.
If operated slowly enough it would 'honk' also.Just like the 48 inch Dayton ceiling fan in the shop.
RJ
I have a 70's to 80's Edison box fan with the same type of speed control but it needs a new blade. The motor will reach a point where the blade maybe does 100 RPMs and I can make it go even slower than that. The motor loses the torque though.Last edited on Tue Sep 29th, 2009 01:41 am by Rob Duffy
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