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Electric Motors Winding and Repair Electric Motors Winding and Repair Discussion |
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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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02-13-2012, 01:34 PM | #22 (permalink) | |
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Quote:
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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. |
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 |
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! Cheers |
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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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.) |
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:
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04-06-2012, 05:06 AM | #29 (permalink) | |
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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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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:
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04-06-2012, 01:41 PM | #31 (permalink) |
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Yes, i think this...
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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 |
04-11-2012, 05:50 AM | #34 (permalink) |
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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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