Single Vs. Dual layer winds

[1BOHO]

Im curious do single layer winds produce a higher winding factor than dual layer winds? I ask as the winds calculator reports it.

[1BOHO]

Here is the result.

12N10P

Single Layer Kw = .96593
Dual layer Kw =.93301

[1BOHO]

http://www.electrical4u.com/winding-...bution-factor/

RCM-BL700MX Single layer 2 strands of 16Ga. 3 turns wye. Will test.

[1BOHO]

Hello,
More photos......

[1BOHO]

Using the drill press method in which mine is apprx. 2250rpm I measured 1.49Vrms on A B and C
So 2250rpm/(1.49Vrms x 1.414 x 0.95) = 1124kv

[1BOHO]

Pulled a sustained unloaded wot run. Logging showed apprx 25,639 rpm @ 7.4 amps and 23.4 volts.KV estimation by log would work out to be 1095.

[1BOHO]

Since Ive already terminated laminated the wires with 7050 clearcast epoxy no need to pull it apart so I could wind the other six teeth the same way then terminate 3 more leads and parallel out side the motor. This way could I run 2 layer wye paralleling the the motor terminals AABBCC or delta if I pair 2 terminals from each single layer AB BC CA motor for DD??

A bit confusing if indeed a single layer A-b-C-a-B-c is simply one layer of winds on each tooth. I say this because if I wind the next 6 teeth the same way -a-B-c-A-b-C and parallel the leads that is a dual layer y wind according to the calculator AabBCcaABbcC but would still be a single layer according to some of the post Im reading, only one layer of coils on each tooth. Its confuses me because based on the calculators diagrams now matter how many winds I put on this it is still single layer which makes sense to me based on the pitch relationship between the magnet and individual coiled tooth - single layer vs the magnet and slot between two coiled teeth - dual layer. This certainly looks me the single tooth to magnet flux relationship might be better which leads to a better Kw.



It seems like no matter if you wind on two teeth 30 degrees apart versus one you will never achieve the better flux relationship because you are always still looking at the gap vs the teeth.

Im not making any definitive claims just looking for conversation and a better understanding either way.

Thanks for you time and thoughts

[1BOHO]

Hi,
Completed the second single layer WYE motor wound -a-B-c-A-b-C.

[ron_van_sommeren]

Originally Posted by 1BOHO

... wound -a-B-c-A-b-c

Typo
-a-B-c-A-b-C

Vriendelijke groeten Ron

[1BOHO]

Thats correct.

Thanks Ron. I fixed it.
Now all I need is to complete the FOC six phase controller .

TTYL
1BOHO

[ron_van_sommeren]

FOC controller
sinusleistungssteller.de/en_High.html
→sinecurrent control

And Takao Shimizu is working on it
BLDC controller

Several other people have posted on FOC in the above long, excellent and active thread.


Vriendelijke groeten Ron

[1BOHO]

Very interesting read,about the benefits of field commutation constant rotor speed mode for pilots.

[1BOHO]

Hi,
Measuring the two separate WYE motors rm returned 10.3 milIiohms for motor 1 and 10.7 for motor 2

[1BOHO]

Looks like if I want to retain the .96 Kw of a single layer but in a parallel y scheme it should be this with each half of the stator only 3 teeth wound.

[1BOHO]

Single Layer 13 ga. 4 turn parallel wye.

[1BOHO]

Motor 1
Motor 2


At 15 degrees timing both wye motors Kv logged apprx. 2320kv
T600 4030 4 turn Single Layer 13 ga. parallel wye.
12N8P Kw .86

[1BOHO]

12N10P 5 turns SL 13 ga. A-b-C-/a-B-c- terminated DD

Edit.....

Ill leave it with 6 terminals for 2 controller and or 6 phase test.

[1BOHO]

A bit off topic for this thread but here is the Triebflügel drive in real rc and animation.Can you build it?
I wanted to share it so I put it here in my thread where an interesting off topic might be allowed.





http://www.seeop.com/development/spi...380&modal=true

http://www.seeop.com/development/spi...380&modal=true

Enjoy
We're all still eating anyway....

[1BOHO]

6+5 YY 1.32mm (13ga.) dual layer. 58% copper increase.

I will post constants as they are recorded.

Scoped bemf of two phases.

[1BOHO]

Photos of the most recent single layer wind a YY wind. 6 Turns of 13 Ga.