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Electric Motors Winding and Repair Electric Motors Winding and Repair Discussion


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Old 02-13-2012, 10:22 AM   #21 (permalink)
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yes, we count on the "neat side".

this side shows the same number, as there are wires into the slot.
and the number of wires in the slot is the crucially thing.

noone should say right or wrong here, the only important thing is, to use the same way in counting to get comparable results.

also I measure the n spec with different esc.
actually with jive 120HV (autotiming); new scorpion 130 HV commander (fix), YGE 320HV(fix) and sometimes also with fightercat 17S -200A esc (also fix)
soon a brand new kosmik will also be available.

in fact, scorpion factory p.e. counts their turns sometimes in a very "own" way - may be to fuddle their concurrents.

the shown rewinding of pyro is a nice and neat work - very good for cooling.
you have used 1,06 or 1,12mm wire for this?
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Old 02-13-2012, 01:34 PM   #22 (permalink)
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Quote:
Originally Posted by powercroco View Post
yes, we count on the "neat side".

this side shows the same number, as there are wires into the slot.
and the number of wires in the slot is the crucially thing.

noone should say right or wrong here, the only important thing is, to use the same way in counting to get comparable results.

also I measure the n spec with different esc.
actually with jive 120HV (autotiming); new scorpion 130 HV commander (fix), YGE 320HV(fix) and sometimes also with fightercat 17S -200A esc (also fix)
soon a brand new kosmik will also be available.

in fact, scorpion factory p.e. counts their turns sometimes in a very "own" way - may be to fuddle their concurrents.

the shown rewinding of pyro is a nice and neat work - very good for cooling.
you have used 1,06 or 1,12mm wire for this?
Mr. Okon thanks for your compliment, but this is my 1st motor winded.... all the nexts is better. in the pics are showed 1.18 mm wire.
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Old 02-14-2012, 06:19 AM   #23 (permalink)
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Talking about cooling I've found my hk3 4035yy 1.32 5+6 (red scheme)runs about 10 -15 deg cel cooler than my 4035hk3 1.25 5+6,(blue scheme) depicted here http://www.powerditto.de/schemamodus12N_YY2.html same heli's same setups
As can be seen in the unfortunate "bad quality" cell pic of the 1.32yy i took at the time there is quite a bit of breathing space due to the crossover being on the inside. However wont be any advantage once extra turns are needed as that will take up the airspace.
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Old 02-14-2012, 07:15 AM   #24 (permalink)
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interesting.
in such cases I do a crossover test (change the cans) to find out, if small mistakes - mostly in magnet spacing) are the reason of differences.
What have you found about the kv of both motors?

in fact the temperature doesn't have a big influence on motordata, if the differences are so small.
the copper needs 300 to double its resistance.
so 15 are only about 5% in copper resistance, which makes only a part into the sum of losses.
and all materials into the motors mostly can resist about 150- 170 working temperature.

www.powerditto.de/verluste.html
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Old 02-14-2012, 08:12 AM   #25 (permalink)
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Kv on both motors are same , only reason i like the lower temps is on the tdr with the closed canopy at rear things get hot inside. Temps are still only 60c when flying hard.
Still hot enough to burn the fingers!
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Old 02-14-2012, 08:19 AM   #26 (permalink)
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of course, if n spec is identical, only the cooling air causes the difference.
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Old 03-28-2012, 03:12 PM   #27 (permalink)
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https://www.helifreak.com/showpost.p...2&postcount=85

HK 4025 - 1100KV
4.5T short @1.5 mm target 1100
esc: Hobbywing 80A
timing set: 15 degrees
V: 6S /22.8V

motor #1 = 1070 Kv / rpm 24000 (approx.)
motor #2 = 1068 Kv
/ rpm 23800 (approx.)
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Old 04-05-2012, 06:21 PM   #28 (permalink)
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GMAURO,

Question for you.
I noticed you mention you used a Hobbywing for most of the motor testing.

Did you find you had to change any esc settings(timing, PWM) for good performance with new windings ?

Here are my standard esc settings


Low Voltage Protection Mode - Soft Cut
Low Voltage Protection Cutoff - Middle
Start Mode - "Very-Soft"
Timing 15

Governor Mode - OFF
PWM Frequency - 12 Khz




Quote:
Originally Posted by GMAURO View Post
I also want to contribute with some information about some of my engines

Pyro 700-45 12N10P 6+7X1.25 D 441 Kv
Pyro 700-52 12N10P 6+5X1.32 D 514.5 Kv
Pyro 700-45 12N10P 6+5X1.32 YY 609 Kv
Pyro 700-52 12N10P 6+6X1.32 YY 535 Kv
Pyro 700-52 12N10P 7+7X1.25 D 416 Kv
Pyro 30-12 12N10P 6+6X1.32 D 523 Kv
Pyro 700-45 12N10P 5+5X1.4 D 576 Kv
Pyro 30-12 12N10P 6+7X1.25 YY 500 Kv
Pyro 700-52 12N10P 6+5X1.4 D 518Kv

Scorpion HK2-4035 12N10P 6+7X1.18 YY 490 Kv
HK2-4035 12N8P 7+7X1.25YY 540 Kv
HK 4225 KIT 12N10P 6+7X1.32 YY 529 Kv
Hyperion HK4035 12N10P 6+6X1.25 YY 483 Kv
HK 4525LE 12N10P 6+5X1.4 YY 546 Kv
HK2 4035 12N10P 6+5 X1.18YY 527 Kv
HK3 4035 12N10P 6+5X1.4YY 522 Kv
HK 2221 9N6P kit 6+6 Y 1629 Kv
HK 3026 12N10P 6+6 X0.9YY 931 Kv
HK 3026 12N14P 6+5X1D 698 Kv
HK 3026 12N14P 5+5X1Y 447 Kv for Protos 500 12S
HK 3026 12N14P 7+8X0.9 YY 594 Kv
HK3 4035 12N10P 6+7X1.32 YY 430 Kv
HK 3026 12N14P 8+9X0.8YY 526 Kv for protos 12S
Hk 4020 12N8P 6+6X1.25 YY 1023 Kv
Hk 5025 12N10P 6+7X1.6 YY 504 Kv

Dualsky aero 12N14P 13+12X1.18 YY 227 Kv
Protos 500 lipotech 12N14P 6+6X0.9 YY 895 Kv
Align 700 MX 12N10P 7+7X1.25 YY 471 Kv
12N10P 6+6X 1.32 YY 551 Kv
12N10P 6+7X1.32 YY 515 Kv
KDE Direct 700 12N8P 6+5X1.6 YY 510 Kv
Align 600 MX 12N10P 6+6X1.18 D 502.6 Kv
Turnigy 600-1100 12N8P 5+4X1.32 YY 1010 Kv

For complete and correct information, the ESC used is and Hobbywing 120A-HV with 15 fixed timing.
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Old 04-06-2012, 05:06 AM   #29 (permalink)
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Quote:
Originally Posted by HeliFX View Post
GMAURO,

Question for you.
I noticed you mention you used a Hobbywing for most of the motor testing.

Did you find you had to change any esc settings(timing, PWM) for good performance with new windings ?

Here are my standard esc settings


Low Voltage Protection Mode - Soft Cut
Low Voltage Protection Cutoff - Middle
Start Mode - "Very-Soft"
Timing 15

Governor Mode - OFF
PWM Frequency - 12 Khz
Hi, for my opinion, to test motor without load is no requested particular setting on esc. If you give a little change of timing (around correct value) you have only different kv results. 12 khz of pwm is correct for general pourpose.
Naturally, if you test very different motors, for example big motors with high pole number, and little motors with low pole number, is needed big change on timing setting.
No governor mode, but only aero mode with linear throttle curve.
Other setting is only for desired work of motor, that you whant.
Ralph, if i've wrhote a wrong advice, please correct me.
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Old 04-06-2012, 10:53 AM   #30 (permalink)
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thanks Gmauro,

seems like there are no dramatic changes to esc settings with newly rewinded motors just the standard things.

good to know.

thanks



Quote:
Originally Posted by GMAURO View Post
Hi, for my opinion, to test motor without load is no requested particular setting on esc. If you give a little change of timing (around correct value) you have only different kv results. 12 khz of pwm is correct for general pourpose.
Naturally, if you test very different motors, for example big motors with high pole number, and little motors with low pole number, is needed big change on timing setting.
No governor mode, but only aero mode with linear throttle curve.
Other setting is only for desired work of motor, that you whant.
Ralph, if i've wrhote a wrong advice, please correct me.
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Old 04-06-2012, 01:41 PM   #31 (permalink)
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Quote:
Originally Posted by HeliFX View Post
thanks Gmauro,

seems like there are no dramatic changes to esc settings with newly rewinded motors just the standard things.

good to know.

thanks
Yes, i think this...
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Old 04-06-2012, 02:04 PM   #32 (permalink)
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I have noticed one thing that has improved smoother ramp up and much better all round behavior with vbar + external gov + hobbywing.
This may be partly to the fact that esc perform better with star YY over delta motors.


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Yes, i think this...
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Old 04-10-2012, 11:57 PM   #33 (permalink)
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Is there one of these handy charts available in a .xls file or super excel format ?

just wonder if one is available it save me some time make one
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Old 04-11-2012, 05:50 AM   #34 (permalink)
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Quote:
Originally Posted by HeliFX View Post
I have noticed one thing that has improved smoother ramp up and much better all round behavior with vbar + external gov + hobbywing.
This may be partly to the fact that esc perform better with star YY over delta motors.
please don't misunderstood, my opinion regarding setup is only for test the motor on test bench. In flight the setup are important and any change give different performance.
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Old 04-11-2012, 01:51 PM   #35 (permalink)
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yup, I'm aware of that GMAURO.

cheers


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please don't misunderstood, my opinion regarding setup is only for test the motor on test bench. In flight the setup are important and any change give different performance.
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