Search found 151 matches

by APL
Jan 15 2019 2:47pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

Found this link on lamination bur's, or shorts, for reference. Another 'headache' PDF,..but very good information nun the less, and should probably be posted here. Explains all the effects of shorted lam's, with lots of FEM./graphics. https://orca-mwe.cf.ac.uk/50967/1/06571275.pdf Just skim through ...
by APL
Jan 14 2019 10:47pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

Thanks johnnyfoos, good to hear about your project,..hope you get it finished. I get a lot of info. from the wind generator thread's, since they are axial. A little different in the fact that they are mostly air core, but the construction is pretty much the same. Thank's for following this build, I'...
by APL
Jan 14 2019 10:35pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

FWIW, even fi the lams have some shorting between them, it's still way better than a solid bar, as far as eddy currents go (which is the reason to use lamination stacks vs bar). So true, I was hoping to squeeze more out of them, but it probably won't make that much difference in the end. I am think...
by APL
Jan 13 2019 10:04pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

Things continue to get in the way of progress, but we're still moving forward. Should be able to finish the lam stacks tomorrow, and move on to the bonding process. I found some polyurethane glue that's fairly thin, and it says that it's good for steel and glass, so we'll give it a try. The lam's ar...
by APL
Jan 09 2019 9:32pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

So Ive been looking all over the ES, and internet for magnet glue, and came up with a few favorites. Problem with glues is theres are so many of them,..probably thousands. And as far as how well they work for a certain purpose is only known through personal experience really. Thats why I'm inclined ...
by APL
Jan 09 2019 8:40pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

Thanks for the awesome info KD5ZXG, I didn't know JB would hold up to 500 degrees. I love your core, especially the home-brew Litz wire! She's a beauty! Your results are very impressive. If I ever get this motor to spin, and yank me down the road, I'll have to return to the ferrite core, with all th...
by APL
Jan 09 2019 2:25pm
Forum: Alternative Energy
Topic: Electric Flag.
Replies: 9
Views: 220

Re: Electric Flag.

12-15mph a few times a week,'maybe'. Funny thing about the wind,..when I ride my bike, or go fishing, I always wish for no wind, but when I fool around with these things, I wish for high wind,..go figure. I've seen windmills that use horizontal flaps, and your right using gravity is a good idea. I h...
by APL
Jan 08 2019 7:08pm
Forum: Alternative Energy
Topic: Forever running magnet motor?
Replies: 77
Views: 9013

Re: Forever running magnet motor?

The problem with free energy, is that governments would try very hard not to allow it. Who knows, maybe there are many machines already? Ha! :P It would ruin our social network in an instant, because everything is connected energy wise from oil companies, to power stations to banks, and on and on. T...
by APL
Jan 08 2019 6:45pm
Forum: Alternative Energy
Topic: Electric Flag.
Replies: 9
Views: 220

Re: Electric Flag.

A few milliwatts? Your probably right. Fact is, the wind usually blows around 10 mph or so, and theres not a lot of action. It needs to get up to 12-15 mph to be useful at all. Still, it's cumulative,.. all day and all night. Depends on the State, and the hight, I suppose. People all over the world,...
by APL
Jan 08 2019 12:54pm
Forum: Alternative Energy
Topic: Electric Flag.
Replies: 9
Views: 220

Re: Electric Flag.

I had to laugh when you mentioned storms tearing it apart! Thats exactly what happened to the last 'windmill' I made. :lol: "The wind is like Loki, god of mischief, and always finds a way to dash your foolish efforts." It's a fun thing to play with though, and a good way to get the kids involved in ...
by APL
Jan 07 2019 10:05pm
Forum: Alternative Energy
Topic: Electric Flag.
Replies: 9
Views: 220

Electric Flag.

I'm in one of those crazy moods tonight,..probably regret this later... :oops: A while back I had the Idea of making an electric flag, that would run some kind of generator, piezo, or shaker flashlight type of system, mounted somewhere towards the front, that runs off the back and forth motion creat...
by APL
Jan 07 2019 9:04pm
Forum: Alternative Energy
Topic: Forever running magnet motor?
Replies: 77
Views: 9013

Re: Forever running magnet motor?

The universe is a forever running motor, it started a long time ago, is running now, and will continue running virtually forever. It produces tons of energy, moves planets, solar systems, and galaxy's. All with no input. While it may be true that someday it will run out,..none of us will be around t...
by APL
Jan 06 2019 9:20pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

Lamination stacks are slowly coming along,.. defiantly labor intensive. Once I get three sets of seven, I can bond them together, and clean them up on the belt sander, to open up the ends, and remove any burs, or shorts. Lam. stacks.jpg I found a USA company that makes and sells lamination material,...
by APL
Jan 04 2019 9:33pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

Thanks madin88, I'll start out with what I have,.. but I could make some more back iron rings later, and try some of the 13mm wide magnets. It would be an interesting comparison. (might have to anyway, if things go south) I know theres a probably a lot of other things wrong with this motor. Oh well,...
by APL
Jan 04 2019 9:13pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

Thanks for the info. KD5ZXG, I didn't know that about JB Weld. I remember reading another one of your post's somewhere else among these threads, along the same lines. Very interesting. The Ferrite core is not completely dead yet, and perhaps it will be returned to in the future,.. it has to at least...
by APL
Jan 03 2019 8:47pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

After looking around for a while, the formula's looks to be about twice the air gap per side. Air gap is roughly 1mm,
so 2mm per side, or 4mm overall wider magnet?
by APL
Jan 03 2019 3:10pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

Thank you madin88, for that general rule for back iron thickness. Thats just what I'm looking for. Since this isn't exactly a precision motor, things don't need to be all that perfect yet. 10mm wide PM's, 3.3mm back iron, 1/8" steel. Wonderful! That brings me to something thats been bothering me as ...
by APL
Jan 02 2019 9:25pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

Making a little headway on laminations. They have been cut into rough piles, and then put on the mill, to make them all the same length,..35mm, a little wider than the OD. width of the stator plates. That gives me some wiggle room, and moves the PM magnets a little farther out from the aluminum. You...
by APL
Jan 01 2019 10:10pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

Also, I suppose it's worth mentioning at this point, that the end windings on the side of the motor, do not contribute to thrust. The windings that goes 'across' the core, or through the motor, are most important. So a long, thin tooth is more efficient than a fat, or square tooth. Which might be an...
by APL
Jan 01 2019 9:42pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

Interesting, spinning magnets, I hadn't thought of it like that. Although I read some information that collaborates that in a few different papers this morning. I would think that more, smaller magnets, would be for smoothness,(less cogging), like you said. The weight of more tooth and windings are ...
by APL
Dec 31 2018 9:19pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

Being a lowly shop rat, I know a little about everything, and a lot about nothing,..and usually have to rely on logic, intuition, and a good gut feeling. although logic works the best. :) Most all of motor design is math and equations,.. which my little pea brain doesn't accept. After looking around...
by APL
Dec 30 2018 10:00pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

Doing some more searching, and found some info. on 21 slot stators, saying that it's not recommended using 20, or 21 poles, with that many teeth. Then, another chart of LCM numbers showing that 26 poles are better than 28, stating that a higher LCM number is better. So at the moment, I'm going to go...
by APL
Dec 25 2018 9:02pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

Finally finished all the set screw holes, the 3mm grubs are just the right size, and I feel confident that things are strong enough. I'll drill down into the lamination stack a millimeter or so, and that will lock everything in place. I put an old core slug in it for show, but the new ones will be a...
by APL
Dec 23 2018 10:50pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

Really bad photo of the rod core, but hopefully you can kinda get the idea.
Rod Core.jpg
Rod Core.jpg (69.52 KiB) Viewed 638 times
Hmm...
by APL
Dec 23 2018 9:37pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 132
Views: 1650

Re: APL's DIY axial-flux motor

I'll have to look into it locally. I'm pretty sure this motor is going to shake and shimmy, and probably be noisy as hell, with all the imperfections that I've put into it. Still,.. I've seen worse on Youtube, and they seem to do well. Water jet would be nice, so precise, and all the holes would be ...