Curved ceramics & 2 pole.

[Jerry]

I've converted a bunch of motors & I'll most likly convert a bunch more. A few years back I started collecting all kinds of motor from all those free sources. I've got well over 500 now.

Many are not as good as others for conversion. Mainly 2 pole. 2 pole are 3450 rpm and as such need farly high rpm as a wind genny. This is not a good combo.

However I'm flying a 2 pole at my store and it does quite well but its real bumpy.

That is in low wind you can see its amp metter throbing. I think though batteries like this "pulse charging?).

Most 2 pole have very small diameter bore. Not the one I'm flying at the store though. I used 6 curved NEOs on this NNN, SSS.

I was looking for a solvent to remove magnets from things liks dc motors and speaker baking plates. Someone had suggested Accitone. I tryed that and I had a 1 gallon can carborature cleaner with the basket. The carb cleaner worked good the accitone didn't.

I had placed a 1/3 HP garbage disposal motor stator in the carb cleaner. This is the high rpm dc type motor. Just the outer casing and its 2 magnets went in the carb cleaner.

I left them in over night. Today I just pushed the magnets out of the housing.

There just happened to be a 2 pole motor stator right there. So just for fun I set them in the 2 poles bore and they fit nicely.

So I'm going to use the curved ceramics in this 120 volt, 2 pole, 3450 rpm, 14.4 amp motor to see if it makes as much power as my Lowes ceramic disc dual rotor alt?

The race is on?

I'm building the armature from the magnet pole pieces of 2 old junk subs.

Heres a few pics.



Here is the doaner ac dc garbage disposal motor. I've tryed these direct but they need too much rpm and they don't have a good shft for blade mounting.



Here are the 2 magnets I pulled out after soaking over night in carb cleaner.





                         JK TAS Jerry

[Jerry]

Here is the speaker magnet end plate.





                    JK TAS Jerry

[Jerry]

Pix after machining the end plates.



A couple shots with pole pices and magnets.













                      JK TAS Jerry

[Jerry]

Heres pix of the motor and magnets in the bore of the stator.













Well now to get the other stuff scounged up, shaft, end plates, bearings and such.

I'll bench this one with the new motor speed control I just posted about. Kill to tests with one?

                      JK TAS Jerry

[Jerry]

I know these are just ceramics and I do have some curved NEOS but I'd never waist them on a 2 pole conversion like this. I could use bar NEOs but I've tryed bar NEOs and they would not have as thin gap or cover as much of the pole as these ceramics so the power would probobly come out close to the same?

At any rate this one is just to see what I can get out of some free junk. I know it will work better then just using the PM motor the magnets came from and if it works as well a a 50v Ametek at least it won't have brushes to were out.

                          JK TAS Jerry

[zubbly]

Hi Jerry!

Glad to see you taking a crack at 2 pole conversions. I do believe they have been overlooked and do deserve experimentation.

     I think your results will be good. I think they will be awsome if done with a 2 pole 3 phase unit. I got a 2 hp 2 pole 3 phase unit in the shed just waiting.

     I have salvaged a few ceramic mags from dc motors, but wish i could find a source that supplies the actual motor manufacturers. Coversions would be much less costly, but i also think still worth the effort.

Let us know how it turns out.

zubbly

[ghurd]

Hi Jerry,

How fast did the carb cleaner work?  I mean, would carb spray work or does it need to soak?

Been soaking mine in acatone for almost a month.

G-

[Jerry]

Hi G

I left the PM stator in the carb cleaner about 24 hrs. I did some taping with a chunk of wood on one and pried the other of with an old bucher knife.

Maybe I just got luck? I'll try a few more.

                       JK TAS Jerry

[Jerry]

Hi Zubbly.

When using old PM motors as magnet doaners its hard to find the arch curve of the magnets that matches the inside curve of the AC motor stator. I have a bunch of these PM garbage disposal motors and a bunch of 2 pole motors.

I can see a good combination with 2 pole 3 phase. I'm sure this would do away with the lumpy behavier and reduce rpm requierments.

The bore sure looks tinny in the 2 pole compaired to even 4 pole. The 8 pole have a bige bore.

I have a few larger diameter PM motors but most just use 2 magnets. I'm going to use my tile cutter with the wet diamond bladed to cut them down. This way I can make magnet sets for 4, 6 or even 8 pole conversions.

I've not got around to a motor rewind yet. I'm still abit intimidated about that.

I will do that though and use your instructions. Thanks for the help and insperation in that area.

                             JK TAS Jerry

[Jerry]

Hi Zubbly.

I have a freind in the auto parts biz. He's going to get me a few of the magnet car starter motors. I'm not sure but these might be NEOs?

But even if there not I'm sure they will be of larger liameter and be fairly thick? I'm hopeing for NEOs ofcourse.

Weed eaters have a nice magnet set also and you can double up for lingth.

All a bunch of fun turning junk into something usefull.

                      JK TAS Jerry

[BT Humble]

Have you tried putting them in a pot of boiling water?  I've found that softens the glue on E-I ferrite transformer cores quite nicely (or at least enough that you don't break them trying to pry off the "I").

It shouldn't get hot enough to demagnetise them, either.

BTH

[Jerry]

I might try the boiling thing. I'll test the befor and after flux stringth.

The magnets are glueing now. I used JB Weld. The type with iron stuff in it. I wanted the iron stuff to fill the gap between the iron center core and the magnets.

There is a slight diameter diferance. I hope to test this unit in a day or 2.

                      JK TAS Jerry

[ghurd]

Have a couple of the same blower type motor. One is soaking a month in acetone.

Heated the last one with a mini-torch to the point where the ring was glowing under the torch.  It didn't work!

It was very interesting.  The magnets were well broken before torch time.  Lots of pieces and chips of magnets were stuck to the ring and remaining glued on magnet.

As the magnetic parts got too hot, they fell off.

Like campfire sparks, falling to the ground.  Cool.

Beat what remained off with a hammer and screwdriver.

Dang good glue, whatever it is.

G-

[wooferhound]

Jerry

your camera should have a setting for small file sizes

set your camera to VGA or 640 x 480 (same thing)

There should be a Standard/Fine setting too, don't set it to fine

There must be a gigabyte of pictures in this post

setting the board to display a smaller percentage picture is not helping

sure the pictures display smaller, but the file size is the same big size

[nothing to lose]

Has anyone been getting car raditator fan motors and such?

I was at the yard the other day and picked up 2 motors, but I want them as is, not torn down.

 Anyway I was asking the guy about them, they rip stuff down right to the copper wire there when scrapping, he showed me a couple nice magnets

 Said they all have 2 magnets like that in them. Nice curved ceramics. Hopefully I will go back today and maybe get a couple of the magnets. I was short on funds the other day so just got fans.

He was wrong about the motors not making any power when spun, I asked him about it and he said they would not. Sure they do, not alot but they read on the meter just fine spun by hand. Probably not worth trying to make anything out of though.

His magnets looked to be in pretty good shape, I'll try to remember to ask how he gets them out, or maybe those were just a lucky shot and most break??

[Jerry]

Hi woof.

Sorry about that. I thought I was doing a good thing by using the smaller % number.

I'll look into what you've suggested. I can't promiss I'll have any kuck doing your recimondations though.

I don't get along well with computer stuff. This last problem with the posting on the board put my mian computer of line for a month and I had to pay a puter tech to fix it.

For most folks computers are there freinds to me they are my enimy. They'll stab me in the back with no remorse and when people try to help I just get lost.

If I can't figure it out I may just have to quit posting pictures. I don't want to cause problems.

                      JK TAS Jerry

[Jerry]

Hi Nothin to lose.

I have a wet/dry ceramic tile cutter. This littel saw set up comes from Harbor Freight its around $60 on sale.

It cuts ceramic magnets real well. Most small motors have 2 magnets. This saw will cut them down so you can make4, 6 or 8 pole magnet arangments. The trick is to find the right diameter to match your motor conversions.

I'm using this saw to cut large diamteter speaker magnets into wedges to make dual rotor alts. Not much power but very cheap and I injoy turning junk into low powered free wind generaters.

                     JK TAS Jerry

[electrondady1]

hello jerry hows your coil jig  coming. i cut up speaker mags as well . ifound an old toster oven is great for getting the mags off the iron . 275 degres for about half an hour and the muffins are ready.

[Jerry]

Hi Electrondady1

Well as you can tell I bounce around from project to project. Find a littel time here and there.

I need to wind some coils for my second dual rotor. Maybe next week?

Toster oven EH. Might that high heat kill the flux in them thar magnets?

Need a gaus meter (SPL?).

                      JK TAS Jerry

[electrondady1]

i have found no loss of power from useing the oven. the nice thing is you can do  ten at a time.  not shure about sticking whole motors in.  i can't find a gauss meter for under 400.00 us d

[nothing to lose]

Yes I saw your post when you got that and been thinking about geting one latter myself.

Right now I am really wanting a lathe and milling machine, smaller cheap ones but good, and been looking at those from harbor frieght. Everytime they get them on sale for a great price I am short on cash and when I have the bucks they aren't on sale

 Or the store won't have them in stock, that happend once also.

Geuss I will have to order from the catalog and have one shipped, ooohhh I hagte that idea though.

[ghurd]

Wish I would have got the little all-in-one mill/drill/lathe for $550 on sale.

Paid $350 at the retail store, with a sale and a coupon, for the mini-lathe.  Next day a mailer came with the lathe. Would have been about $35 cheaper, total.

Mine refuses to drill a hole in the center of the stock. Not possible, right? Well, it won't.  Something needs adjusted in the tail I guess, but can't figure what or how.

And you can't do much with what you get. Figure on a lot of extras.

G-