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View Full Version : just to be sure: is this OK?


Q
01-23-2005, 11:19 AM
I can do 9 winds per layer, so 2 layers give me 18 winds.
When I start from the inside, I'm back at the inside after 18 winds. Now if I want to go higher, I need to go back out a bit before continuing the winds because you can't get 3 layers in the inside of the stator. There's not enough room between the arms. Now that's not the problem. But after 5 more winds I get about to the outside of the arm and need to go to the inside again to get to the next arm. The only proper way to do this is put the wire in a radial way. If the wire is fixed using some expoxy (never use CA on laquer, it breaks) would this be OK? I suppose it is, but I'd like to get an expert's oppinion.
Here's a picture of the arm I did so far. Don't look at the ones in the back, those are just bad tests.

swatson144
01-23-2005, 02:38 PM
There's something funky about the arm to the left of the pic. It kinda looks like 2 "ends" so it's hard to determine if it is clockwise or ccw.

Assuming you started on the left it looks good to me, if all are indeed clockwise windings.

When finished winding, to keep it all together I use epoxy and micro baloons to form a thick paste so as to keep it from running into the way.

Q
01-23-2005, 04:02 PM
I know how to wind a stator, that's not the problem. The arms are indeed wound clockwise.
It's just the fact I run the wire back to the center after 23 winds that I want a confirmation about.

Oh, and if you can mix in cotton fibre with your epoxy it will get even a better paste. Micro balloons should be used for saving weight, cotton fibre for getting a thicker paste. You can combine both if you want. Never go over 50% in weight of additions though.

swatson144
01-23-2005, 04:31 PM
I always bring them back to the center to keep them as far out of the way of the can as possible. If you are terminating delta they'll likely wind up towards the center anyway. Terminating Wye just bring all the ends back towards the center and join them, which will keep them there. The starts are already wrapped into place, near the center. If you started at the outside of each phase I'd thread them under the bypass to the center. AS pictured you show the end running back towards center before advancing to the next arm. This is correct as the 2nd phase will pretty much force this condition.

When finished cotton fiber epoxy mix if you please. One could also use the Thermally conducting resin from epoxies etc or another brand of potting compond if you are winding hotter or getting near 50w/stator.

DadHav
01-24-2005, 12:32 PM
Hi Guys, On one of my first motors I had a wind that would have ended up at the shoe of the leg. I tried something different. I tied the wire up against the leg with dental floss and stared my wind from the top. This was a little tricky to get it started, but the motor ran as strong as any I've built. Maybe another way to do it would to use the shrink tubing method of insulating the leg, but run the wire to the top under the insulation. Actually I solved that problem by winding three or four strands of thinner wire. This way you can get to where you wand without any trouble. Just a though. Have a good day.
John

Q
01-24-2005, 02:37 PM
Well, I can't use anything fancy as I'm doing a build manual for newbies. I want to show a low (9), a medium (18), and a high wind (23).
This thing needs to be as stock as possible.