Alternative motor windings and drive schemes

[Clugh]

But the Africans have now a 12N8P dc excited flux switch machine. The rotor is laminated steel so she can turn faster and pm loss is null an void. It is the electromagnetic flux switch motor. Bipolar it makes plenty of torque from a standstill straight across to a heavy load. 6 LRK coils. The other 6 are the dc field coils in the flux focus arrangement. That replaces the flux focus PM array internally buried in the teeth of the permanent magnet flux switch machine. Since it is a port of a SRM I suppose it could be noisy. Its the perfect candidate for magnovol wedges. It will make much more torque than the conventional bldc. See the dovetail segmented rotor sections?

TTYL
Hubert

[Clugh]

If you are greedy they also have hybrids... 12N10P dc excited permanent magnet flux switch

[Clugh]

Vince is potted and ready for termination and a test drive.

Thanks for your time and patience
Hubert

[Chxpress]

Hi Hubert,
The Flux Switch machines are a very interesting alternative also for high-torque drives. I think you also have the papers from the University of Delft, with the direct drive helicopter. Cooling the coils and magnets in the stator is likely to be advantageous. The rotor is very robust. Thanks to the three-phase design, the noise is not as extreme as with pure reluctance motors. You can also ask Kosta Kanelis about this, he did his diploma and doctoral theses on this and we built a number of bus engines together and were able to measure them thoroughly in test operation. And yes, if you consider that the surfboard from MHZ would only require one machine that supplies a large, efficient jet drive. There are some who are not submissive to Powercroco, who have also saved Powerditto and Croco pages, which we will evaluate in peace and then point out the nonsense of the creator. That's how it gets fun.

Happy Amps Christian

[Clugh]

I have Vince's F3A pyro 600 load test log.

[Clugh]

On 4s lipo she pulled the APC 12 x 4 prop 13,345 rpm for 1013 watts max. @ 65 amps. The bell was 30C* at the end of the 2 min run.


Hubert

[Clugh]

Lets dial it up to 8s and see if we can pull over 2000 watts. Hopefully just under 3.

[Chxpress]

Hi Hubert,

look good, what‘s your load , break or propellor?
I am in Italy next 4 days , testrun a Dallara Stradale on a circuite track , nice street legal car.

Happy Amps Christian

[Chxpress]

Hi Hubert,
you still know as you you NASA's magnetic gear developments. I then searched further and found versions that integrate the motor centrally. That makes it a lot more compact. You can see that the modulator ring is always stationary. If you release the torque, the modulator wants to rotate against the direction of rotation of the output, but cannot due to the fixation. Well, industry normally doesn't need counter-rotating drives, but with propellers and ship propellers you can achieve some advantages, which makes it interesting. A counter-rotating propeller drive with reduction would be possible without gears and without wear. Only the forces are limited to the magnetic transmission torques, which correspond to the torques of normal model electric aircraft engines. I'm attaching a few pictures on the topic. I have also calculated a version for flux switch motors that, depending on the reduction, double, triple or quadruple the torque. Without gear transmission, it is quieter than any other and also like the previous counter-rotating propellers with higher overall efficiency.

Happy Amps Christian

[Ah's Availble]

I just purchased 4250 out runner motors for my Flightline Mosquito, The prop adapters are too short for my spinner/propeller setup (need one with threaded shaft of 32mm or greater in length.). The prop adapter has a four screw mount to the motor body. In looking for a replacement I can't find any website with dimensions for prop adapters.

Can anyone help me find one or decrypt the minimal information on the websites?

[Clugh]

I just purchased 4250 out runner motors for my Flightline Mosquito, The prop adapters are too short for my spinner/propeller setup (need one with threaded shaft of 32mm or greater in length.). The prop adapter has a four screw mount to the motor body. In looking for a replacement I can't find any website with dimensions for prop adapters.

Can anyone help me find one or decrypt the minimal information on the websites?

Please start a separate thread..

Thank you
Hubert

[Clugh]

Hi Hubert,
you still know as you you NASA's magnetic gear developments. I then searched further and found versions that integrate the motor centrally. That makes it a lot more compact. You can see that the modulator ring is always stationary. If you release the torque, the modulator wants to rotate against the direction of rotation of the output, but cannot due to the fixation. Well, industry normally doesn't need counter-rotating drives, but with propellers and ship propellers you can achieve some advantages, which makes it interesting. A counter-rotating propeller drive with reduction would be possible without gears and without wear. Only the forces are limited to the magnetic transmission torques, which correspond to the torques of normal model electric aircraft engines. I'm attaching a few pictures on the topic. I have also calculated a version for flux switch motors that, depending on the reduction, double, triple or quadruple the torque. Without gear transmission, it is quieter than any other and also like the previous counter-rotating propellers with higher overall efficiency.

Happy Amps Christian

Hi,
Just came in from yard work. I'm very interested in the magnetic gearbox. I'll sit down and have a look this evening.

The 4S lipo load was a 12 X 4 APC propellor.

[Chxpress]

Hi Hubert,
as we all see the contradrive workes very well . So it's a good thing that no one believes the nonsense of the garden gnome from the Power Croco team, who, like the others there, has no training in aerodynamics and has never worked in the field. In addition, he did not build his counter-rotating drive in a wind tunnel or suitable measuring devices. It's very good that, for example, the indoor flyers are not at all interested in the Powercroco windings and go their way with contradrives.
myy latest version outbord motor with contra poddrive i build for a friend , has higher trust and speed withbthe same power input for the batteries and lower drag as it used no skeg fin, less loss .
allso to see the 12 n 20 p motor with winding faktor 1 just for fun for a solar powered drive.

Happy Amps Christian

[Chxpress]

Thanks for info about the load.
i send you infos about the magnet gear with integrated motors , e- mail . This is not for the reptile copie shop woh has no owen inspiration , nonpatents , nothing . Croco brain is very small.

Happy Amps Christian

[Clugh]

Thanks for info about the load.
i send you infos about the magnet gear with integrated motors , e- mail . This is not for the reptile copie shop woh has no owen inspiration , nonpatents , nothing . Croco brain is very small.

Happy Amps Christian

Was ich brauche, ist ein 7:1-Getriebe, das klein genug ist, um zu meinem Speedfire2 zu passen. Was ich mir immer wieder vorstelle, ist ein Flux-Switch-Getriebe. Verstehst du, worauf ich hinaus will? Aber vielleicht hast du ein kleines Outrunner-Design für ein normales Getriebe. Denk dir was aus.

[Clugh]

Sie zeigen das Flusspapier, also ist das eine Hallbach-Anordnung? Und was haben Sie für eine überlappende Wicklung? Sie wissen, dass mich das interessiert. Hören Sie auf zu spielen. LOL!

[Clugh]

Ich denke, das ist es, was wir uns ansehen sollten, um preislich konkurrieren zu können. Überhaupt keine Magnete. Das bedeutet nicht, dass ich nicht an einem Halbach-Array interessiert bin

Thank you
Hubert

[Clugh]

• Today at 19:56

• #695

Today I was able to test run the first finished engine of the small series III.
I left it at 14S during the test so as not to endanger my actuator.
The "worst" data group:
47.02V - 403.4A - 16655rpm.
That was only 3.35V / cell - the batteries just can't do it as well as they used to!
Admittedly, my test batteries are no longer the freshest.

Both when using the "lie formula" (see appendix) and in the drive computer, the data of the current "Scorpion knocker" looks just as good as the ones shown in the first posts of this thread.
However, this was to be expected, because nothing has changed in these engines since 2018.
It is pleasing that the magnets perform just as well under load as they did with Series I.
Seen in this way, the "knockers" are actually real classic cars by now.

The only thing that surprises me is that in the past almost 6 years, no one has really built anything better.
Apart from high-pitched verbiage, there is nowhere anything useful in the scene.
But one should not lose hope! Appendixes

• 
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VG Ralph



Hell you say many and I have because the align rates better than that but Ill build umpteen better engines asap !Every pyro is now already...

the reactive power queen stays on fire so its hardly a hard act to follow. U look like Malasia....

Hubert

[Chxpress]

Hi Hubert,
Well now after 6 years and it's actually been over 8 years, Okon noticed that his engines haven't developed any further. In truth, the engines are as of 2008 or 2010. But that's just their status. We have always developed further, but who develops further and immediately stands up and presents it everywhere for nothing in return? How stupid would that be? He also didn't understand that many top speed pilots had said goodbye to his squad. They no longer wanted to take part in these dependencies of his and when things were done like that with Christian Hidde and Thomas, Thomas was constantly approached in a strange way. He doesn't help, sleeps all day. The delta-connected winding of Thomas's pyro is not suitable, etc. everything is documented. Who would like to take part? On the boats we drive completely different machines that are also unbeatable in speed flight, Lehner and Steve Neu internal rotor with gear, which is the same as the turbine with gear in aviation. None of the heroes dare to develop a new transmission. The material exists, we use it at completely different performance levels. So they remain limited to the old junk, and better things are excluded. For the manufacturers it is a completely unrelated part of model flying anyway.
But it's reassuring that he still doesn't understand that his machine succumbs to the synclos sooner than little Lehner did. The Lehner has been designed completely differently from its calculator, for other applications with higher quality electronics. The machine with a better magnet system would be completely different. The EMosys cut shows what it should look like. Just turn to the outside runner and things will become clearer. Inside stator with flux locks, wide stator teeth and flux compression in the rotor magnet system. Then, with the correct design, 20 N per 1^2 cm stator shear area is possible. 5050 Scorpio doesn't even have half that.

The picture with the fluxpaper showen ist not a Halbach array, this are straight magnets in low slots. And easy 20 pol 12 slot winding , overlapping winding over 3 arms. only higher frequenz and windingfactor 1 .

Happy Amps Christian

[Chxpress]

Hi Hubert,

here the pictures of the winding math. there is a two layer winding with double coils and the singl layer winding ,
For the fluxswitch i have to to the math , send you next e-mail.

Happy Amps Christian