Alternative motor windings and drive schemes

[Clugh]

I still hope it doesn't take you guys 15 more years to find a better wind. Industry is here....
Its 2025. 2015 been gone cap!

[Clugh]

Look what the slot wedge does at 3mu in the IEEE test. It is also notable how much broader the efficiency is at 30 mu wedges. You lose some torque there for that gain in broadness across the power range. Can you read this correctly Dr. Can you interpret and make sense of the obvious results? I guess a carbonyl wedge or varying thickness might get you there. Its amazing you keep trying to stuff copper when a thin wedge made from carbon fiber may improve things significantly across the power band. You see it right here 🙈. No one cares about the speed planes. This is e motor tech and the results from the discrete labs with the $10,000 - $15,000 PA's. What does the common hobbyist have? Not even a scope.

[Clugh]

If you listen and open your mind it is very easy to conceive that you can drop a couple amps in idle current and lower the load amps. You.. can use the calculator and see how your efficiency will rise as a result mathematically.

What else would an intelligent person need to try it???


All you have to do is compare bell and core temperatures under load then of course your mechanical out but if you maintain relatively the same winding resistance while lowering the idle currents how could you go in any direction but upward in terms of power factor and efficiency?

Its truly a no brainer so If you have one please use it. Lower drag in the ball bearings and less slot noise will bring you something. Prove to yourself it wont before you run your mouth in Germany.

I have things to do..But your models will not run any better until you move toward in a positive direction with the winding technology available today.

Thanks for your subscription Dr....
Hubert

[Clugh]

Btw...
I threw out these extractor pins and won't use them again for motor shafts. The TIR left alot to be desired compared to the precision ground motor shaft They induced vibration!

Cobra motors also makes an inexpensive quality shaft in 6mm and 8mm that make great longer replacements and they have the flats too.

[Clugh]

Cobra 8mm shaft

[Clugh]

But I don't fully believe the rewound Superrnova report In Germany. I've looked at that motor tell Thomas to show you a log where it took 189 amperes and didn't get hot .

Its a 3220 stator so I'd like to see a video of that pull.....

189 amperes running it through it constantly with any regularity is real bs. Its the same old low resistance wind from 15 years ago. A conventional delta marginally performing in the ac with circulating current. The parallel single layer wye align works at 3o plus amperes less to produce over 6kw its 424 grams and turns the 1918 ABC prop with an AR of 1.9 approximately 30,000 rpm.

Its a decent motor I guess as it claims to out perform the XNOVA 3220. Aesthetically its also more attractive and facilitates axial coil cooling in a direct drive mounting like most drone motors..

If you said 100 amps was rms power which is typical for a 3220 block like this. The motor can probably do 141 amperes towards it limits. You cant get but so much copper into the small geometry with larger stranding which always leaves wasted space.

There's also truly not alot of love here in America or Canada with 14 poles contras and the F3A inverters they are using with their premium brake settings. ItZ critical with them. How that translates to other forms of e flight I cannot say. But their F3A D3 6 step inverters like a 10 pole better.

It would probably be cleaner electrically if it had smaller stranding and utilized more turns and possibly better fill.

The bottom line is the single layer wind generates the most torque and should work better with a six step inverter.

Do we need to start over and reexamine multi layers being in the denominator of the Torque function? There is no way if it is utilized correctly a conventional dual layer wind make smore torque. To utilize it you have to quiet the slots or you can make it slot less.

[Clugh]

As I've said before I have an interest in the Jeti Mezon line. Which has specifically F3A settings in the jeti box. from what I can gather in the Ecalc inverter database she has a very low on resistance. So I'd forget advertising hype of various brands including Jeti and just have a look at it.

But that's just me..

TTYL
Hubert

[Clugh]

Ultimately I wonder how much a Bee swarm Optimization actually differs from a wild bundle in hand winding in terms or performance because the inductance varies with the wires placement in different locations of the slot.

This feeds idea that a radially stacked parallel bi filar wind would work better than an axially stacked one.

Aside from fill a pretty orthogonal winding also may not be the best performing.

Can you track with that?

Bi Bi
Hubert

[Clugh]

Im going to order one and do a few things differently then turn the 7X10 with it and see what she does .Looks like a 7 x 13 croco prop Is what he has mounted.

[Clugh]

[Clugh]

Maybe the leaders will look here for a better understanding.

https://www.academia.edu/79180262/Winding_inductances_of_fractional_slot_surface_mounted_permanent_magnet_brushless_machines?email_work_card=title

[Clugh]

Just +1% can you achieve it Ralph? Dresden is silent



Danke
Hubert

[Clugh]

You still run old inverters with a speed limit? Wow? watch APD go for 200,000 rpm.

[Clugh]

These videos are at least 7 years old...does it look like a sinus????

[Clugh]

Halo Ralph!

Ich verstehe. Ich schätze, es hat seinen Preis gehabt, seine „empirischen“ Diagramme zu verwenden, um deinen Motor zu stärken. Jetzt redet er über deinen Thread und redet über wärmeleitfähige Materialien. Er ist witzig, aber dein Problem. Du glaubst, eine 28er-Serie bringt 5,5 kW? Haha.

Versucht, sein lautes Paralleldelta zu verteidigen.


Viel Spaß im Forum
Hubert

[Clugh]

Nachtrag: Ich sehe, er spricht jetzt im Thread mit der Bezeichnung „5020 Joker“ von einem 3520. Das ändert die Sache. 5,5 kW mit 1045 Watt Verlustleistung sind nichts Besonderes. Ich werde ihm keine 300 Euro dafür geben, das können Sie mir glauben.

Die Spezifikationen beziehen sich bei jedem Post auf eine andere Motorgröße.

[Clugh]

Die Spezifikationen beziehen sich bei jedem Beitrag auf eine andere Motorgröße.

Dieser 81 %-Motor bei einer realen Leistung von 4,455 kW beträgt in Wirklichkeit tatsächlich nur 19,8 watts/gram

[Clugh]

Hallo Ralph, wundert es dich, dass der Kollege aus Bayern fast zwei Monate dort war und mit nichts Neuem außer dem gleichen maschinengewickelten Motor zurückkam? Er hat von dir gesprochen, aber wo ist der 14-polige Halbach-Wunderrotor? Wir haben schon drei Outrunner mit einem 4:1-Thomas gesehen, deinen und den von Pocboys. Der Mann ist verrückt, die Akkus, die er gepostet hat, sind nicht von Gen Ace, sondern von Tatu, wenn er sein eigenes Foto lesen kann. Sag ihm, er soll das Antriebssystem laufen lassen, denn die maximale Drehzahl des 4140 liegt bei 35.000 U/min, und ein 8-Sekunden-LiPo würde ihn auf über 41.000 U/min bringen.

Ein 4-Turn 4140 hat eine kV unter Last von 1416



Das Besondere daran: Ein Pyro 900 wiegt 5 Gramm weniger und kann seine Leistung problemlos abrufen.


Warum verbaut er keinen deutschen Sinus-Wechselrichter, sondern einen amerikanischen Sechsstufen-Antrieb aus Kansas?


Starker Schlupf.

[Clugh]

Definitely ba out of Bayern firstly on a 4 to 1 gearbox you wont get 30-40 krpm at the prop and the motor is definitely not turning a 65 mm prop with a pi aspect ratio anywhere near there without the smoke...direct

This wunderdrive from Germany you keep hearing are something else.

what a nut to keep proposing things then to say they aren't completed because there is no interest. LOL is he a modeler or entertainer of a forum?

[Clugh]

heres some comedy...