Aug 21, 2012, 08:05 AM
Jack
USA, ME, Ellsworth
Joined May 2008
17,976 Posts
Quote:
 Originally Posted by modisc As Greg pointed out, the 12N4P should be using concentrated winding scheme, which the powercroco site only shows distributed winding scheme. Concentrated winding for 12N4P can have a winding factor of 1.
This is the image from the powercroco link you posted, it shows one phase wound it I understand it right.

I thought it was the first phase on the AbCaBcAbCaBc scheme that I got from the calculator.

But I don't understand the "concentrated" winding, is there an example of that somewhere?

Jack

# Images

 Aug 21, 2012, 09:43 AM Registered User Joined Jun 2011 13 Posts Hello Jack, I board requests made ​​in France to pocesseur of this engine. I board a contact in progress. I ais the information I posteraient. @ +
Aug 21, 2012, 02:56 PM
Inspiration
United States, MI, Ann Arbor
Joined Aug 2011
890 Posts
Quote:
 Originally Posted by jackerbes This is the image from the powercroco link you posted, it shows one phase wound it I understand it right. I thought it was the first phase on the AbCaBcAbCaBc scheme that I got from the calculator. But I don't understand the "concentrated" winding, is there an example of that somewhere? Jack
I am sorry. I mixed them up.

The above pic you showed is distributed winding.
concentrated winding is the common one: each coil on each tooth.

12N4P is going to use distributed winding , to obtain a winding factor of 1. A normal distributed winding for 12N4P is going to be 0.5, as shown on powercroco winding calculator page.
Aug 22, 2012, 11:49 AM
Registered User
Antony (France)
Joined Sep 2003
3,134 Posts
Quote:
 Originally Posted by LOULE04 Hello, It semblerais that the winding of origin is like that. A group of four son and two towers. When you weigh? @ +
Hello LOULE

It seems that the original windings are "overlapping coils"
Good for 12 slots 4 magnets
(not common for outrunners, common in inrunners)
Try (firstly) some number of conductors per slot and measure Kv
(for example 4 passages per slot)
Then you could modify the number of turns to get the desired Kv
(and choose the right wire diameter to fill the slots)

Another possibility is to use the "non overlapping" scheme
A-B-C-A-B-C-
I don't know the Kv differences for the same number of wires per slot
(but my personal(top-secret) software can do by brute force simulation)

Louis
Antony 92160 France
Aug 24, 2012, 09:32 AM
Registered User
Joined Jun 2011
13 Posts
Hello,
Photos winding original engine.
AWG 23 (7 wire parallel.)
I do not know the number of turns
A+

# Images

 Aug 24, 2012, 09:37 AM Jack USA, ME, Ellsworth Joined May 2008 17,976 Posts If you can count or estimate the strands in one of the coils that will tell you the turns, it will be a multiple of 7 and the multiple is your turn count. I am guessing that it looks like about 21 strands or3 turns. Or maybe even 14 strands and 2 turns? Jack
Aug 24, 2012, 10:00 AM
Registered User
Antony (France)
Joined Sep 2003
3,134 Posts
Quote:
 Originally Posted by jackerbes If you can count or estimate the strands in one of the coils that will tell you the turns, it will be a multiple of 7 and the multiple is your turn count. I am guessing that it looks like about 21 strands or3 turns. Or maybe even 14 strands and 2 turns? Jack
Hello
Good reasoning
I suggest to Loule to wind 6 turns A-B-C-A-B-C-
and to test for Kv (any wire diameter)
No epoxy in order to rewind again for getting the desired(approx.) Kv with the definitive wire diameter.
Interesting exercise !
Winding factor could be slightly less(con) ... but also less transit useless copper(pro) !
Louis
 Aug 24, 2012, 03:49 PM Registered User Bishopville S.C. Joined May 2003 4,189 Posts Couldn't it be wound ABCABC wrapping two teeth at a time?
Aug 25, 2012, 05:37 AM
Registered User
Joined Jun 2011
13 Posts
Hello,
I think here is a picture in the boninage engine.
With 7 parallel wire of 0.57 (23 Awg) X 2 turns
A +

# Images

Aug 25, 2012, 06:25 AM
Registered User
Antony (France)
Joined Sep 2003
3,134 Posts
Quote:
 Originally Posted by LOULE04 Hello, I think here is a picture ... With 7 parallel wire of 0.57 (23 Awg) X 2 turns A +
Hello Loule
Could you please indicate for this Cyclon
* Stator diameter
* Stator axial height
* Internal diameter of magnets (or airgap)
Thanks for the infos
Louis
Aug 25, 2012, 06:33 AM
Registered User
Antony (France)
Joined Sep 2003
3,134 Posts
Quote:
 Originally Posted by Ron H Couldn't it be wound ABCABC wrapping two teeth at a time?
Hello
Not interesting .. problem of copper filling and transits

Non overlapping windings configs are :
AbCaBcAbCaBc
(and A-B-C-A-B-C-) see previous post
Louis