Brushless motor winding class

[longballlumber]

I like your little green stators! Ha ha

[donhuff]

Yeah, I had a friend make those for me. Thanks.

[T.S.Davis]

Still reading but thought this might be useful.18n6p - 2 turn.JPG

[T.S.Davis]

Still trying to understand. When we're looking at the lead end of the motor. Each of your bundles crosses to their next slot location twice. How is that three turns? It feels like two turns.

I'll make another drawing of the Dynomite 2K motor if I can understand that. Really hard to follow your sketch. Lot going on there. The AQ motor makes perfect sense. Just the turn counts has me scratching my head.

Any chance of doing another Cat5 tutorial on that weird wind? Would the earth shatter if we wound a Dynamite motor all CCW? Thing there is any advantage either way?

Full of questions. Sorry Don.

[TRUCKPULL]

Terry-
Your diagram is a 2T not a 3T ( also wire code need a S3 and a F3)

Look at the pictures in Don's posts #23 -#25 and #27
Their are three wires in each slot not two.

Larry

[T.S.Davis]

I was duplicating the sketch from post 19. Good catch on the labeling Larry.

In my head the bundle goes end to end through the stator three times on Don's cat 5 sample but doesn't form three full loops. On the exit of the third pass it goes to the next coil (3 slots over). Feels very much like a 2.75 turn motor. Maybe Don can fix my head.

18n6p - 2 turn rev.JPG

[donhuff]

Damn, good call Larry.

Terry, this is so hard to do with pictures and words. In person, I would have ya'll doing this in no time at all. I like your drawings cause it keeps things in order better than my hand drawn ones. But do another one and stretch it out, left to right more, so it's not so bunched up.

A turn will not be able to "close" a complete loop around the teeth. The number of times a single strand (if we were using a single strand instead of a bundle) goes through a slot, around the bottom of the teeth, then back up and out of that coil, is considered a turn.

DSC_0002.jpg

this is what you would call three turns.

[donhuff]

Then you skip over to the next coil, on that same leg and with that same wire, then do it one more time for an 18 slot stator.

[donhuff]

The wire on the "end turns" does absolutely nothing for the motor. NOTHING so forget about them. The only wire that matters is what is running through the slots.

[donhuff]

In my head the bundle goes end to end through the stator three times on Don's cat 5 sample but doesn't form three full loops. On the exit of the third pass it goes to the next coil (3 slots over). Feels very much like a 2.75 turn motor. Maybe Don can fix my head.

Thats right Terry. end to end three times, BUT DOES NOT CLOSE UP THE LAST LOOP. It don't have to, so forget about that. How many times it goes through the slots is what determines the turn count.

[donhuff]

" Any chance of doing another Cat5 tutorial on that weird wind? Would the earth shatter if we wound a Dynamite motor all CCW? Thing there is any advantage either way? "


Yes I can do that but..... ya need to get the simple one first!

Winding it all CCW would be OK. Or doing it all CW would be ok. That would just make the motor run in the other direction, switch any two leads and your back running the other way again. CW or CCW the motor doesn't care, as long as they are all the same, on this particular wind.

Like I said before. I have done the same exact DYNM3831 motor, both ways and didn't see any difference. DO IT THE SIMPLER WAY FIRST!

[TRUCKPULL]

Terry -
I just noticed something else in your diagram.

Your #2 wire should start in the slot to the left of #1 - (not the right)
#3 would then start to the left of #2

The way you have it your pairs will not match up to be joined together.
S1 - S2 ------- S3 - F1 --------- F2 - F3

Just change your #3 wires to #1 and your #1 wires to #3

Larry

[donhuff]

Larry,

It will still work doing it that way. I actually was going to mention in my description that you could put #2 on the left of #1, or on the right. It really doesn't matter, just when you go to twist them together, get any two that are side by side.

And you could just renumber Terry's wire like mine. The wire is still in the same place. Or do away with the numbers completely. I was using them to try and help keep track of what is going on.

This type of wind is not particular about the termination as long as you get any two that are beside each other. Not so with some other winds, they require 1S- 2F, 2S-3F, 3S-1F, and wont run any other way.

[T.S.Davis]

Don, this is way easier in the real world. I didn't have any cat5. I did have some other wire laying around that was a bit larger. I was able to blow threw a 2 turn full phase in 2 minutes based on your drawings and descriptions. So it's work'n. It's super NOT complicated in the real world.

[T.S.Davis]

Don, so all that wire that cross the stator to get to the next coil is more or less dead weight.

New drawing attached. See if it's easier to read. Should I do a 3 turn too or do we all feel it's kinda just one more run through the slots and we can all follow that?
18n6p - 2 turn rev 2.jpg