Alternative motor windings and drive schemes

[Clugh]

New engine | RC-Network.de

Nice post Christian but why not make it slotless and just use a toroidal core wrapped in three coils 120 then 1alpha overlapped? Similar to a split phase toroidal core. If you remember the high efficiency split phase drive coilsin the inverter that drove this carbon fiber modulus motor. You know you could build a large diameter pan cake inrunner motor rotor like this and use the pm in a spoke flux focus arrangement with an alternating pattern of N/S S/N.... S/N N/S around the circumference of the rotor. You could definitely turn this at a higher rate of speed especially at a small scale.

[Chxpress]

Hi Hubert,
You can see what an uptight bunch these troops are by their reaction since I gave them the T-Motor AT 4130. It's so cheap, they didn't even register it. None of them really looked at the model engines. I showed the engine in your thread a few weeks ago. Now they have all fallen silent and are grieving in their ignorance. You still don't understand the syncloss. Why do the Lehner inner runners have one that is not accessible to your batteries and controllers? Why does the Lehner outside runner have one that appears much later? SPS winding with sheet metal cut for it and not something you put together yourself. You have so little knowledge. You are far above them, simply because you are also familiar with electronics. Most people have almost no idea about it. I'll write you another email this evening.
And Yes , you are right , it is what we are looking for a smaller deepdrive motor with slotless coils and straight conductor not lay in angle. And a high rev Version for boats. All is possible and we write the papers.

Happy Amps Christian

[Chxpress]

Hi,
as you show the AX 335 in answer 2120 , the cheap Robbe 4356 show the same cooling way .

Happy Amps Christian

[Chxpress]

The Umbrella motor from Allan Cocconi has the right design. With a thin , sheet plate iron ring in the middle of the Coil arangement it has the same double Airgap like the deepdrive motor.
i ad the blue line inside , the iron .

Happy Amps Christian

[Clugh]

Hi,
as you show the AX 335 in answer 2120 , the cheap Robbe 4356 show the same cooling way .

Happy Amps Christian

Thank you for the post.
Christian,
Haben Sie sich schon einmal eine BLDC-Maschine mit konsequentpolen angesehen? Stahlpole wechseln sich mit PM-Polen ab, die alle die gleiche Polarität haben. Bei Folgepolmaschinen verläuft das Ankerreaktionsfeld größtenteils durch Eisen, da die Anzahl der Magnete reduziert ist und Eisen zwischen ihnen vorhanden ist. Diese Eigenschaften führen zu mehreren Vorteilen:

• The reduced number of PMs leads to a reduction in costs (both in manufacturing and maintenance),
• The introduction of a reluctance torque leads to an increase in torque at speeds above the rated speed,
• Reduction of edge binding flow and thus increase of flow binding
• Reduction of PM losses (eddy current losses in the magnet) by conducting the armature reaction flow through the iron poles.

I wonder if Pluto likes it?
Hubert

[Clugh]

Hi,
as you show the AX 335 in answer 2120 , the cheap Robbe 4356 show the same cooling way .

Happy Amps Christian

Take a closer look Chris. 👀

The T motor fan blade is actually pitched like a prop and directional so prop it in the other way and it will actually suck air in through Rudi's spinner and spit it out over top the esc.


Supported by three bearings it really is a beautiful machine, Well built. It is also only 39mm OD so it can actually fit an f5B or f5D plane. Compact!

The silent Dr. Hannibal - Lecture can see that.

Hugh

[Clugh]

Es wurde festgestellt, dass das Rastmoment im CPBLPM größer ist als das des oberflächenmontierten PM-Gehäuses. Die Hälfte der Magnete wird eliminiert (50 % weniger PM-Kosten), bei einer geringen Verringerung derEffizienz (3 %). Bei oberflächenmontierten PM-Motoren variieren die Induktivitäten nicht mit der Rotorposition, aber CPBLPM-Motoren haben eine variierende Induktivität und daher wird eine neue Komponente des magnetischen Drehmoments entwickelt.

[Clugh]

Here Chris! is what I have been trying to explain to Ralph and his friends when you run a with single layer versus a dual layer wind with six step excitation. When you match the wind with the drive excitation you create the most torque dense power system minimizing torque ripple.

Trapezoidal excitation ( six step)

Look and you can see how the DLRK will not like the Tribunis 6 step or BL heli s but the LRK will in comparison? When you widen the LRK coil on tooth width to the pole pitch reduce the coil off thickness to regain slot area and thicken the stator back iron you understand that max flux density is there but also look at what happens with the torque ripple with a 6 step Tribunis or BLHELI with trapezoidal excitation. When you widen the six coil on teeth and wind it LRK that is going to form a trap bemf and further improve this motor inverter relation ship. That is why the torque delivery is almost unity as compared to the DLRK that Ralph winds. Its actually not optimal as compared for the tribunis scorpion makes or BLHELI commutation . LRK is much better suited with more torque delivery on the six step drive.

[Clugh]

Sinusoidal excitation

Now look what happens is almost the opposite if you run a sinus ESC like the SLS or YGE with the LRK vs DLRK but take special note that even though the sinus excitation on DLRK is also very low in torque ripple the over all torque output is considerably lower than the LRK and LRK uneven tooth width especially in all cases. You see almost a full Nm difference in this test. That's really relevant. If Crocoworlds 20 speed pilots have more data than Dr. Dahaman Ishak, Dr. Z. Q. Zhu, Dr David Howe and 70 universities across the globe about BLDC power systems we can throw in the towel for the proxy war.

They won brother.

[Clugh]

If you look the trap drive still gets more torque out of the DLRK as well...despite all the torque ripple from the mismatch. The boys can have the sinus system and Ralphs wind if that is what they want 😄 You think the drone racing league cares about it with their high rpm outrunners dominated by BLHELI six step drives not FOC or anything else?

Ha! I don't want it either, especially for racing! Use it in the washer and dryer where its more suited.

General dynamics and Thikol are there with their R&D at those events.....


I don't care what he or Thomas says.... LRK and the Dual invert with the Tribunis is the way to go for him and his little friends but hard heads makes a soft asses. They can put that OLD slow YGE away. The old gal has an entirely different purpose than driving highspeed high pole outrunners for speed flight.

AFAIC that's a fact.

TTYL
Hubert

[Clugh]

Hi Ralph,
No filing needed for these hi temp stator insulation plates. Less prep time for winding two HKIII 4020's


Hubert

[Clugh]

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[Chxpress]

Hi Hubert,

we have not try this version of Magnet and Iron pole rotor. Our system is the flux compressing slot wedge. The wege ist made of magnetic steel plates . So we got flux rising with lower eddycurent and reluctanz added torque. My way was the double side flux compression motor with self carrying design that need not carbon bandage or a titan drum to mount the magnets and flux wedges . All is self fixed and can hold the force on the rotor. This was a goal in motordesign.

Happy Amps Christian

[Clugh]

Hi Hubert,

we have not try this version of Magnet and Iron pole rotor. Our system is the flux compressing slot wedge. The wege ist made of magnetic steel plates . So we got flux rising with lower eddycurent and reluctanz added torque. My way was the double side flux compression motor with self carrying design that need not carbon bandage or a titan drum to mount the magnets and flux wedges . All is self fixed and can hold the force on the rotor. This was a goal in motordesign.

Happy Amps Christian

Ok. I'm starting to understand what you have done here but the issue for me is getting the custom shaped PM for a POC as a privateer I'm finding pretty difficult. Did you use analytical tools to find the optimal angles? VAC has responded with the contact to their laser haus. I've also been contemplating some type of fixture that would let me cut pm.

Thank you for your time and patience,
Hubert

[Clugh]

See the flux focus here.

Thank you
Hubert

[Clugh]

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[Clugh]

Erwin sagte allerdings, es gebe 50-mm-Alternativen, daher bin ich über die vorgeschlagenen 45- und 40-mm-Motoren ratlos.

Xnova-TAREQ and SPEED EDITION Motor series | XNOVA MOTORS

[Clugh]

BETA Tengu 5040HS / 535kV | egodrift.com

[Clugh]

Global - Combove Type 5040-450kv-1.4mm(12N14P)

[Clugh]

Guten Morgen,
Hier ist es 6:47 Uhr...

Wenn Sie wasserstoffgeglühte Nickeleisenspäne finden, lassen Sie es mich wissen. Sehen Sie sich auch verdichtetes Graphiteisen für eine Glocke an. Je dünner die Wände, desto zugfester ist es. Ein interessantes Material. Das wasserstoffgeglühte Eisen ist möglicherweise durchlässiger als CoFe. Es ist sehr hoch. Das verdichtete Graphiteisen hat aufgrund des Graphits zweifellos eine extrem hohe Wärmeleitfähigkeit. Wird für hochfeste Motorblöcke und Zylinderlaufbuchsen verwendet. Es wird gerade erst der breiten Öffentlichkeit bekannt.

Wie Sie vielleicht schon herausgefunden haben, werde ich einen Verbundeisenkern gießen. Ich gehe davon aus, dass er ziemlich gut funktionieren wird.

Danke,
Hubert