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Converting a AC fan to DC ?
By DRAYCO, Section Homebrewed Electricity Posted on Fri May 28, 2004 at 10:17:17 PM MST
would like to know if it possiable to convert a AC window fan, or anything AC fan, into a DC fan ?

I was woundering, if there is a way to convert or rewire a AC fan so that it becomes DC, to which it uses DC power instead of AC
I'm not too techical in playing around with things, like changing the megnets or the arrangment, just doing simple, or taking out, adding in, something to do the task of changing a AC window fan into a DC powered fan ?
reason for, is that if it can be done, why not, its in my opinion a little bit of a waste to run the invertor to power a AC fan that could be running under DC power, if that can be done in the first place,
well, thanks for any help on this subject

Converting a AC fan to DC ? | 6 comments (6 topical)

Re: Converting a AC fan to DC ? (none / 0) (#1)
by RobD on Sat May 29, 2004 at 05:36:45 AM MST

I think it is a good idea to be finding ways to run appliances without using an inverter but the problem is that there are many AC motors available and we have no way of knowing which type you may have. As an alternative you might think about finding and auto windshield or other 12 volt DC motor to replace the one you want to adapt.
RobD

Re: Converting a AC fan to DC ? (none / 0) (#6)
by DRAYCO on Sun May 30, 2004 at 08:58:40 PM MST

heres pictures of the fan,
i cant seem to unscrew the housing covering the internal parts to the fan motors,they are really hard screws, so i've not done anything with them, unless someone needs more detailed internal photographs, then i'll try to take it off

ĐRÄYCO
[ Parent ]

Re: Converting a AC fan to DC ? (none / 0) (#2)
by Norm on Sat May 29, 2004 at 05:58:32 AM MST

Replace the AC motor with a car heater blower motor the only problem is you have to use the resistors(converts electric to heat wasteful) or equivalent that comes with the blower.
Now might be a good time to learn about brushless motors that have an electronic speed control(or semi-mechanical for that matter) please go to....

http://www.simplemotor.com/rsmotor.htm

You might enjoy this and (any others that are curious about brushless motors.)
It kinda unravels the mystery of brushless motors to those of us that are electronically challenged....
Fun! ( :>) Norm.
( :>) Norm

Re: Converting a AC fan to DC ? (none / 0) (#5)
by RobD on Sun May 30, 2004 at 07:57:43 AM MST

Cute motor!

[ Parent ]

Why Not? (none / 0) (#3)
by wdyasq on Sat May 29, 2004 at 06:02:27 AM MST

If one goes to a Truck Stop they will find a huge assortment of 12 Volt "appliances".

There are 12V and 24V ceiling fans available. There are Coffee makers and Microwaves that run on DC. They aren't cheap but, they avoid the inverter.

Ron
Adventure is just bad planning." -- Roald Amundsen

Re: Converting a AC fan to DC ? (none / 0) (#4)
by tecker on Sun May 30, 2004 at 05:15:34 AM MST

It would be a little complexed but I too have pondered converting a Ac fan to Dc
A muntispeed fan should have the windings (but I'm unshure ) put magnets on the rotor
and sperate the windings setup the poles and pulse with Hexfets of suitable power ratings pole postions are sensed with hall efect devices use a 7805 to power the Hall ic and provide gate voltage I'm all strungout on a project but I've got a box fan in the corner that's saying let's do it .

Converting a AC fan to DC ? | 6 comments (6 topical)

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