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Old Aug 21, 2012, 08:05 AM
Jack
USA, ME, Ellsworth
Joined May 2008
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Quote:
Originally Posted by modisc View Post
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
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Old Aug 21, 2012, 09:43 AM
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Joined Jun 2011
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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.
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Old Aug 21, 2012, 02:56 PM
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modisc's Avatar
United States, MI, Ann Arbor
Joined Aug 2011
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Quote:
Originally Posted by jackerbes View Post
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.
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Old Aug 22, 2012, 11:49 AM
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Fourdan's Avatar
Antony (France)
Joined Sep 2003
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Quote:
Originally Posted by LOULE04 View Post
Hello,
It semblerais that the winding of origin is like that.
A group of four son and two towers.
When you weigh?
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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
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Old Aug 24, 2012, 09:32 AM
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Joined Jun 2011
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Hello,
Photos winding original engine.
AWG 23 (7 wire parallel.)
I do not know the number of turns
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Old Aug 24, 2012, 09:37 AM
Jack
USA, ME, Ellsworth
Joined May 2008
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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
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Old Aug 24, 2012, 10:00 AM
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Antony (France)
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Quote:
Originally Posted by jackerbes View Post
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
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Old Aug 24, 2012, 03:49 PM
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Bishopville S.C.
Joined May 2003
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Couldn't it be wound ABCABC wrapping two teeth at a time?
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Old Aug 25, 2012, 05:37 AM
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Joined Jun 2011
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Hello,
I think here is a picture in the boninage engine.
With 7 parallel wire of 0.57 (23 Awg) X 2 turns
A +
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Old Aug 25, 2012, 06:25 AM
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Antony (France)
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Quote:
Originally Posted by LOULE04 View Post
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
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Old Aug 25, 2012, 06:33 AM
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Antony (France)
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Quote:
Originally Posted by Ron H View Post
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
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