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Electric Motors Winding and Repair Electric Motors Winding and Repair Discussion


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Old 05-14-2020, 03:31 PM   #41 (permalink)
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Or maybe you can import a 1:1 scan dimension it and come much closer than you did. Good luck buddy.


Farewell!
Hubert
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Old 05-19-2020, 06:16 AM   #42 (permalink)
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@ Christian with your professional permissions ones should be able to download these with no problem . I sent you an email just in case.
Thermomagnetic Liquid Cooling: A Novel
Variable Speed Motor Drives Thermal
Management Solution
G. Karimi-Moghaddam, R. D. Gould, S. Bhattacharya


Thermomagnetic Liquid Cooling: A Novel Electric Machine Thermal Management Solution Giti Karimi-Moghaddam, Richard D. Gould Mechanical and Aerospace Engineering Department Subhashish Bhattacharya Electrical and Computer Engineering Department North Carolina State University Raleigh, USA Darren D. Tremelling Power Electronics Department ABB Corporate Research Raleigh, USA

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1Boho
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Old 05-19-2020, 06:20 AM   #43 (permalink)
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Heres an interesting grant application Chris. It is also noted in another paper that a full immersion and isolation into the gap would have a shielding proponent that would be proportional to field strength. The stronger the field is the less effective the FF would be as a shield. However other academic testing and Grim E bikes has shown that full immersion is hardly necessary with a direct drive outer rotor machine to facilitate the significant heat transfer efficiency brings. As a damper there is also evidence it will quell vibrations especially in the presence of a strong magnetic field. Look up FF shock absorber research. The work with FF electromagnetic cooling properties will be heavily researched into these next few years. You will see.



https://gow.epsrc.ukri.org/NGBOViewG...f=EP/T017988/1



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Old 05-19-2020, 04:18 PM   #44 (permalink)
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Hi 1BOHO,
yes, the moderator obviously protected the transmission specialist from Dresden, who first said that the power should not be distributed differently with a differential gear # 39 and later claimed that he knew how differential gears function. He contradicts himself and obviously doesn't even notice it. Simply stupid.
Thank you for your aircraft presentations. The world plane from Rutan has something. It also brings me to another drive. A Lehner 2250 equipped with two planetary gears. One drives a propeller at the front of the aircraft and the second gear drives another propeller at the rear. This means that a transmission only has to endure half the power. Most are afraid that the gears will not be able to transmit power and will be destroyed quickly. The drive can be installed in a center fuselage, electronics and the battery cells stowed in the wings. It then only needs two thinner CFRP tubes as holders for the tail unit.
See a short drawing. The Lehner 2250 can handle up to 800 amps when the coils are wound for 100000 rpm. The rotor can do it. The motor weight 560 gramm plus 162 gramm for two Reisenauer Super Chief gear. With two gear in normal layout the two propellers have the same rotation direction. If one gear is modified to drive the planet gear suporter and let the output go to the hollow inside tooth ring it will run counterclockwiese with a little lower gear ratio. So the front propeller can rev the basic speed and the propeller in the back rev higher to give the air a little acceleration tomrise the propwashspeed. What do you think , who was the first doing a phonecall to Lehner and wants to order the new Lehner outrunner ? Yes the German Chinaman who is supporting Scorpion motors. You know our spezial friend . What a fun this man.

Happy Amps Christian
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Old 05-19-2020, 05:33 PM   #45 (permalink)
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Hi
Unfortunately I dont know any transmission 3xperts from dresden but I like the easy idea u post the guy fails to understand. Oh well Christian.... all the negative things he posted about contra drives is posted in his and pc's contra drive thread so I dont worry about it. They won't glorify here it free of his own proposed cons to the system as a whole. That won't happen here and the "Thomas's" are not here to facilitate the false posting to the people.


Hugh
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Old 05-19-2020, 05:46 PM   #46 (permalink)
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Please read the papers I sent you.

I want the impba FE scale boat record. The hull is cf and I have alot of work to do. Wanna help? I NEED BATTERIES TO COMPETE AGAINST A 25 TIME WORLD CHAMPION.

I got a score to settle in my district as u know.



Ttyl
Hugh
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Old 05-20-2020, 08:20 AM   #47 (permalink)
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Hi 1 BOHO,

yes i read the papers and you will get the Fe record.
Have you seen my last outbord build on intel... ?
I show you moore , have done it last week, made from carbon plates and has ballbearing at the propshaft. Has twin skeg for ridelevel control made of super hardend pianowire sheet 0,2 mm very thin for less drag and this is currently the size to start , later i will cut it down.

Happy Amps Christian
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Old 05-20-2020, 08:24 AM   #48 (permalink)
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Quote:
Originally Posted by CHX2 View Post
Hi 1 BOHO,

yes i read the papers and you will get the Fe record.
Have you seen my last outbord build on intel... ?
I show you moore , have done it last week, made from carbon plates and has ballbearing at the propshaft. Has twin skeg for ridelevel control made of super hardend pianowire sheet 0,2 mm very thin for less drag and this is currently the size to start , later i will cut it down.

Happy Amps Christian

I located the thread....Cool stuff as always.....
Hubert
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Old 05-20-2020, 10:47 AM   #49 (permalink)
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Hmm I wonder if the transmission expert is privy to know the Gerling/Gurakuq uneven turns ratios can implemented still using single coil winding systems and pcbs? The winding methodology used to remove the 2 pole harmonic is as illustrated. It isnt the ratio of turns from one tooth to the adjacent one, it's the coil sides on the same tooth being unequal. For instance this shows a 4/5 uneven turns ratio. The diagram shows how you facilitate this. The decimal equivalent is .8 . This works pretty well for a 12N10P ideally set at 7/8 (.875). For the 22 pole its an entirely different ratio. I posted some time back how to determine the right ratio based on the right equation. This technique should also also works with the wye to delta which furthers attenuate harmonic rotor losses and boost the working. A test or a suggestion that I have not seen is the G/G turn executed on a single layer machine. Eliminating its 2 pole harmonic would seem to be a beautiful thing.
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Old 08-07-2021, 11:17 AM   #50 (permalink)
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Default Neumotors 100% American option

Neumotors is offering to have the motors fully assembled in the USA with parts sourced in the USA. 100% American made...



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Hubert
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