Author Topic: K55 ceiling fan motor  (Read 32285 times)

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ghurd

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Re: K55 ceiling fan motor
« Reply #60 on: January 28, 2011, 11:40:48 AM »
The frequency is less than double standard 60Hz.  Should be fine.

Need (or should want to) go lower than 18-30VAC.
 VAC x 1.4 = VDC.   
30VAC goes to (30 x 1.4=) 42VDC, and LM317 blows up at 38VDC input.

A 10VAC transformer would be fine.  14VAC at the most.

LM317 is kind of complicated to get 12VDC.
They make a non adjustable version, 7812, sort of the same thing except the adjusting resistors are in it already.

There is a heat issue too.
Simplified,  317 or 7812 heat is Amps x Voltage reduction.
(30Vin - 12V out) x 0.5A = 18V x 0.5A = 18W
18W of heat in that little thing is going to make Magic Smoke.

Plus, why waste 18W in heat to get 6W usable output?

After the bridge on the DC side, use a big capacitor to keep things smoother.

The simplest way is get a 12VDC regulated output wall-wart.  All the good stuff is in it already.
115VAC in.  12VDC out.

If you are determined to make the thing youself, shoot me an email....
Armpit deep in all that stuff, except for the transformers.
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rustkolector

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Re: K55 ceiling fan motor
« Reply #61 on: September 19, 2011, 08:07:38 PM »
It has been quite awhile since updating this thread. This project is finally completed and running better than expected. It is not a wind turbine, but I was able to find the help I needed here to complete this project. This is a 1/10th  scale model of a slow speed 1912 vintage Bruce-MacBeth 100 hp stationary natural gas engine driving a similar vintage alternator modeled after a Westinghouse alternator design. The model alternator core is an Emerson K-55 ceiling fan stator. The alternator rotor uses 18 neo magnets for excitation and produces about 100 watts at 120vac and 750 RPM from each of the two windings. The 4 cylinder engine (1" x 1.12" bore x stroke) was built from bar stock and runs at 625 RPM on propane with an alternator voltage of 100v. The engine easily pulls 40-50 watts (and will pull much more), but runs nicely for demo with a 15-20 watt load. The clear plexiglass inspection door window in the engine is not permanent. It is for watching the splash oil system to select a good oil viscosity and RPM setting to maintain adequate internal lubrication.

I love to model working antique engines doing what they used to do. My thanks to all who helped me with this project. 

Jeff


http://www.youtube.com/watch?v=2-qdar5TEpQ

12AX7

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Re: K55 ceiling fan motor
« Reply #62 on: September 19, 2011, 08:20:27 PM »
Very COOL!

TomW

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Re: K55 ceiling fan motor
« Reply #63 on: September 19, 2011, 08:33:19 PM »
Super Stuff!

Thanks for the share.

Tom

oztules

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Re: K55 ceiling fan motor
« Reply #64 on: September 20, 2011, 03:13:00 AM »
Took 3 times to attampts to reply.... but gee
Damn classy stuff. You need to be proud of that.


.............oztules
Flinders Island Australia

Bruce S

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Re: K55 ceiling fan motor
« Reply #65 on: September 20, 2011, 07:29:12 AM »
A beauty to watch. I'd leave the plexiglass there for ALL to watch.
Do you build stuff like this for a living?
Thanks for the update!!
Bruce S
A kind word often goes unsaid BUT never goes unheard

rustkolector

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Re: K55 ceiling fan motor
« Reply #66 on: September 20, 2011, 09:46:19 AM »
Thanks and, no, I don't build these for a living. I have always wanted to build working model engines, but I never had the time, or the tools to do it until retirement.

Jeff

bj

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Re: K55 ceiling fan motor
« Reply #67 on: September 20, 2011, 03:35:04 PM »
   Jeff   That is simply awesome.
"Even a blind squirrel will find an acorn once in a while"
bj
Lamont AB Can.

12AX7

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Re: K55 ceiling fan motor
« Reply #68 on: September 20, 2011, 08:11:25 PM »
Thanks and, no, I don't build these for a living. I have always wanted to build working model engines, but I never had the time, or the tools to do it until retirement.

Jeff

Okay,  why not?  build them for a living?   How many hours do you have in it?   any pics of the building process?

gotta ask, whats your next project?

rustkolector

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Re: K55 ceiling fan motor
« Reply #69 on: September 20, 2011, 09:00:18 PM »
Why not? I guess because it is a hobby, and I want it to stay that way. And, since I am not an experienced machinist I have to take my time. This model took 18 months of part time work to build and another 6 months of tinkering to get it running like the real ones. Building a scale model invariably creates additional problems that take time to sort out. Just figure the volume of a hypothetical cylinder and then scale it to 25%, and see how well the volume scales. Similar issues with flywheel inertia, fuel vaporization, ignition shorts when 18,000 volts gets too close to scale components, etc. Getting a model running well can sometimes takes a long time. These challenges can be fun, but can also be exasperating at times. That's where forums like Fieldlines.com can be so helpful. 

Jeff

ghurd

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Re: K55 ceiling fan motor
« Reply #70 on: September 28, 2011, 10:37:22 PM »
Looks GREAT Jeff!

As long as it is a hobby, it stays fun.
Fun is good.
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rustkolector

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Re: K55 ceiling fan motor
« Reply #71 on: March 03, 2013, 09:35:32 AM »
Hi Again,
A year and a half ago I learned a lot on this forum about building a PM alternator from a ceiling fan motor. My thanks again to all who contributed to my success with this little project. A more recent video of this model engine project is show here:

http://www.youtube.com/watch?v=a5yUtb7baOk

I have another new and similar project and again need a little advice. I want to build a smaller PM alternator using a 3.3" dia standard D624 fan motor stator. The motor I am looking at is 230v, 0,4A, 1550 RPM. I am looking for a 15-25 watt 12vdc regulated output at about 375 RPM. One motor manufacturer advertises the D624 frame as a shaded pole design motor. Not sure about other manufacturers designs. My question is, will the shaded pole design hinder using this stator as a PM alternator? Thanks for any insight.

XeonPony

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Re: K55 ceiling fan motor
« Reply #72 on: March 07, 2013, 07:37:52 AM »
I'd use Lexan window! it is amazing to see the internals running!
Ignorance is not bliss, You may not know there is a semie behind you but you'll still be a hood ornimant!

Nothing fails like prayer, Two hands clasped in work will achieve more in a minute then a billion will in a melenia in prayer. In other words go out and do some real good by helping!