This is what you need for that raggedy lathe in Dresden Germany sir....OD and ID grinding.
YWIA....🖤
Hubert
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This is what you need for that raggedy lathe in Dresden Germany sir....OD and ID grinding.
YWIA....🖤
Hubert -
For fun...I wonder if Audiosmith knows my other interest. 35 years experience in audio and mobile electronics installation. 3 linear motors. In this discipline it is alot to be learned about stiffening battery driven power supplies, impedance, coil cooling, frequency and filtering. All your fancy commutation algorithms use IC with DSP. Digital Signal Processing audiophiles call it digital sound processing. Its the same thing. Phase shifting ( field weakening), low pass filtering( betaflight) etc. Sound auto calibration DSP works in a similar way as a ZUBAX motor agnostic inverters brain that learns your prop. It send out a broad spectrum of sound listens then compares what it hears to a flat response in its registry it then uses it's parametric or graphic equalization capability to boost of cut frequency band in the 3rd octave appropriately to try to match that flat reproduction response as closely as possible. . The different things in the room and the shape of the room naturally boost or cut audible frequencies so no room is the same. Likewise no plane is the same no prop is the same,, environment and so on.
You can very easily drive a motor with monaural audio amplifiers and a DSP circuit with three channels that will allot you to set the phase shift between the 3 channels120 degrees apart. Then you just drive a sinus through the input. We in hobby run about 500 to 1000 hz fundamental. see how it works? This type of bi polar audio variable frequency drive really breaks its neck to produce the perfect sinus because that sounds better to your ear and more natural. At times you can hear that high frequency switching along with the audio it is to reproduce. Just like the ESC and motor whistle at a certain frequency that are divisible by 3. The Triplens.....😈
ESC's are class D so it is even more difficult essentially a digital stair step is used to create the sinus. It is micro stepping. It takes alot of processing and then the faster you go the higher the frequency the faster the micro step has to be. the step is created with PWM with is switching on and off at a duty cycle the width over time. The switching arcs make the fet hot. New fets us small currents an a larger copper footprint to switch so less heat and faster switching are possible. You can get a finer grade of microstep but it take more finer steps to build the total sine wave. Hope you get it.Comment
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If you wanted a pure sine then you run pure class analog circuitry and that is very sophisticated and bulky with all the filtering needed and inefficient as compared. It runs really hot to make the same power as class D and is 3 times the size. Seeing that analog equipment is almost obsolete everyone is trained to repair digital equipment not tube amps or big back tvs. You'd have to find an old ass TV man. Not to mention the source inputs needs to be a true sine so are you going to use your voice, play a guitar, phonograph or another stringed instrument to drive the plane?
The FOC is fine but 99% of the hobby drives turn six step at WOT anyway. 100% of the inputs are digital
The most power density is at WOT.
You can leave the big back TV's at the dump and make life easy with a true BLDC signature from the motor and a six step drive. It is unique to create a bldc geometry then circumvent it with a reverse step pm that injects triplen to create a sinus signature. I didn't design it but it sems to me that one should have been able to run with standard rectangular magnets on a hammerless stator and a six step drive for the most power density.
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I dont know what the joke is about the big Lehner on the go Kart but it only needs a big six step drive, or 2 XLX2's The expensive and bulky VESC big back tv is what the hobbyist purchased when he could have built a simple six step drive with hall sensors using the MC33035 IC and got the most out of it on the go cart. There's a go kart in America with 2 2028's and two XLX2 castles and it is faster than his and cost alot less. the drives are simple to program with great datalogging castle is known for. I wouldn't have purchased the VESC for the go kart in the first place or used it as a proving ground especially if it belongs to my adversary.🤔 I'd put hall sensor on my motor and build a simple 10S drive that produces a trap.
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As far as I'm concerned if you can tune the input to the power stage circuit it's output and motor bemf for sharp and complimentary transient response you could have an almost unity power delivery with the digital/BLDC power system.Comment
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I would ask on German social media why is there so much interest in the 4125 and 4140 if the Scorpion is the outlier. This is not the engine that blows YGEs through demagnetization. I would investigate why the HKs require so much linear current to do their job that the magnets are demagnetized. This is a real problem for the knocker, which the Lehner outrunner does not cause. I would be interested to know how high the remnant flux density of the machine is minus the flux density at the knee. Adjusting the magnet thickness and air gap could increase the desynchronization point. The knocker is what time should be spent examining. It has major problems with blown speed controls. This is an incredibly expensive problem for the pilots. It seems silly to me to investigate the Lehner when the engine the pilots use most widely is the one that causes fires. There is no Lehner banner in Ballenstadt . If the Lehner has already been investigated, why are you so boring as to do it again? This does not help the ardent idiots at Boeing. If he never tests anything, why does do you waste several days commenting back? Do the comments affect you so much if it's never going to happen anyway? You all really show me you have no interest in your own engine development, otherwise there would be a plan to reduce the load current of the machines and increase the torque output so the planes would stop catching fire. I guess for real things to occur we have to do it here in America. The magnet material in a knocker must not be anything special for high temperatures as they advertise.
Thank you
HubertComment
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Marcus Koch
Prop ListHere is a list of props available! Much more will come in future:
For 30 mm yoke:
6,5x12, 6,5x13, 6,5x14, 7,5x12, 7,5x13, 7,5x14, 7,6x18, 7,8x13,7
For 35 mm yoke:
6,5x12, 6,5x13, 6,5x14, 7,5x12, 7,5x13, 7,5x14, 7,8x18, 8,1x23, 8,2x13,7, 8,5x17S, 8,5x20S, 8,6x14, 9x17S, 9x20S, 9x21, 9,4x17,5, 9,5x17S, 9,5x20S, 9,5x21, 10x11, 10x17S, 10x20S, 10x21, 10x24, 10x25, 10x27, 10x29, 10x31,5, 10,5x17S, 10,5x20S, 10,5x21, 10,5x24, 10,5x25, 10,5x27, 10,5x29, 10,5x31,5, 11x11, 11x17S, 11x20S, 11x21, 11x24, 11x25, 11x27, 11x29, 11x31,5, 11x44,5, 11,5x21, 11,5x24, 11,5x25, 11,5x27, 11,5x29, 11,5x31,5, 11x5x44,5, 12x24, 12x25, 12x27, 12x29, 12x31,5, 12x44,5, 12,4x27, 12,4x29, 12,4x31,5, 12,4x44,5
For 40 mm yoke:
6,5x12, 6,5x13, 6,5x14, 7x12, 7x13, 7x14, 7,5x12, 7,5x13, 7,5x14, 8x12, 8x13, 8x14, 8,2x13,7, 8,0x18, 8,3x23, 8,5x17S, 8,5x20S, 8,8x14, 9x17S, 9x20S, 9x21B, 9,5x17S, 9,5x20S, 9,5x21B, 9,6x17,5, 10x11, 10x17S, 10x20S, 10x21B, 10x24, 10x25, 10x27, 10x29, 10x31,5, 10,5x17S, 10,5x20S, 10,5x21B, 10,5x24, 10,5x25, 10,5x27, 10,5x29, 10,5x31,5, 11x11, 11x17S, 11x20S, 11x21B, 11x24, 11x25, 11x27, 11x29, 11x31,5, 11x44,5, 11,5x21B, 11,5x24, 11,5x25, 11,5x27, 11,5x29, 11,5x31,5, 11x5x44,5, 12x21B, 12x24, 12x27, 12x29, 12x31,5, 12x44,5, 12,5x27, 12,5x29, 12,5x31,5, 12,5x44,5
For 45 mm yoke:
6,8x12, 6,8x13, 6,8x14, 7x12, 7x13, 7x14, 7,5x12, 7,5x13, 7,5x14, 7,8x12, 7,8x13, 7,8x14, 8x12, 8x13, 8x14, 8,2x13,7, 8,2x18, 8,5x17S, 8,5x20S, 8,5x23, 9x14, 9x17S, 9x20S, 9x21B, 9,5x17S, 9,5x20S, 9,5x21B, 9,8x17,5, 10x11, 10x17S, 10x20S, 10x21B, 10x24, 10x25, 10x27, 10x29, 10x31,5, 10,5x17S, 10,5x20S, 10,5x21B, 10,5x24, 10,5x25, 10,5x27, 10,5x29, 10,5x31,5, 11x11, 11x17S, 11x20S, 11x21B, 11x24, 11x25, 11x27, 11x29, 11x31,5, 11x44,5, 11,5x21B, 11,5x24, 11,5x25, 11,5x27, 11,5x29, 11,5x31,5, 11,5x44,5, 12x21B, 12x24, 12x27, 12x29, 12x31,5, 12x44,5, 12,5x27, 12,5x29, 12,5x31,5, 12,5x44,5
For 50 mm yoke:
7x12, 7x13, 7x14, 7,5x12, 7,5x13, 7,5x14, 8x12, 8x13, 8x14, 8,2x13,7, 8,2 x18, 8,4x12, 8,4x13, 8,4x14, 8,5x17S, 8,5x20S, 8,5x23, 9x14, 9,4x14, 9x17S, 9x20S, 9x21B, 9,5x17,5, 9,5x17S, 9,5x17B, 9,5x20S, 9,5x21B, 10x11, 10x17S, 10x17,5, 10x20S, 10x21B, 10x24, 10x25, 10x27, 10x29, 10x31,5, 10,5x17S, 10,5x20S, 10,5x21B, 10,5x24, 10,5x25, 10,5x27, 10,5x29, 10,5x31,5, 11x11, 11x17S, 11x20S, 11x21B, 11x24, 11x25, 11x27, 11x29, 11x31,5, 11x44,5, 11,5x21B, 11,5x24, 11,5x25, 11,5x27, 11,5x29, 11,5x31,5, 11,5x44,5, 12x21B, 12x24, 12x25, 12x27, 12x29, 12x31,5, 12x44,5, 12,5x27, 12,5x29, 12,5x31,5, 12,5x44,5,13x27, 13x29, 13x31,5, 13x44,5Comment
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Some speed and prop data from Marcus
here are some test data with the monster on 10/11S with high rpm motors! The amps are low but also the speed:
7x12 Powercroco new in flight data (yoke is a 34 mm which results in a 6,8x12)
Rpm: between 28-29.000rpm
A: 95-80A
speed: 410-420 km/h
W: 3900W going down to 3300 W in flight
Tested with 940rpm/V on 10S and 770rpm/V on 11S 4000; exact the same data
1450KV 330/20 RS-motor on 6S 2700 Gens Ace 35C in Pilf 1.1
7x13 Powercroco new
Rpm: around 29.000rpm
A: 100-115A
speed: 410-420 km/h
W: 4100W going down to 3600 W in flight
Tested with 940rpm/V on 10S 4000
7x14 Powercroco new
Rpm:between 27.000-28.000rpm
A: 115-120A
speed: around 420 km/h
W: 4900W going down to 4600 W in flight
Tested with 770rpm/V on 11S 4000
8x12 Powercroco new
Rpm: between 27.000-28.000rpm
A: 100-125A
speed: 420-440 km/h
W: 4900W going down to 4100 W in flight
8x13 Powercroco new (34 mm yoke results in a 7,76x12,9x)
Rpm: about 27.000rpm
A: 100-130A
speed: 445 km/h max.
W: 4800W going down to 3800 W in flight
8x14 Powercroco new in flight data (yoke is 40 mm)
Rpm: around 27.000
A: 145-120A
speed: 455 km/h
W: 5600W going down to around 4500 W in flight
A 3-blade setup would be better here or go to higher diameter for more thrust!
For the monster i think 9,5 inch or higher get better results in 3-blade setup!
For the Typhoon Ultra XS MAX we use nearly 11 inch for very good results above 600 km/h!
But the motor rpm/cell count/ prop-combi has to fit perfect!Comment
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MK wrote:
P.S. I was the first one who broke officially the 500km/h border at the F3Speed german championship in 2014 with a Typhoon XS and a Powercroco Scorpion 4237, a 11x24 prop and 12S 4000 SLS batteries. My colleaugue Kai Koppenburg did the same on the same day also with a Typhoon XS
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BTW
Bryan contacted me from CK Aero and he still wants the pyro 600 motors for the Brenner contra drives V5 so he will supply me the new Kontronics motors and specially prepared bearings and Ill provide the winding and thermocouple. This leaves me free to pursue many of the things I've shared here. New motor designs , inverters and such. There is only so much time in a day. I have to carve out a small piece for myself and all the things I'm doing.
Thank you for your time and patience.
HubertComment
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This is a double row annular contact bearing. What's inside a Super chief planetary. The question is, is there a suitable upgrade that rolls easier and spins faster and takes more load?
Hubert
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Just an idea if you COULD find one. A double row full ceramic is 212.00 dollars. How serious are you about it?
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Hallo Christian, was denkst du?TTYL
HubertComment
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Christian Lucas
UserHi,
is your name Erwin?
Your teacher, Hubert, in the US forum, where you read every day, has been explaining to you for months how this works and what to do. Read, it's time for you to understand it. Hubert knows his way around.
Happy Amps Christian
ps: 10 Newtons per square centimeter stator surface, the rest can be calculated by your mathematician, webmaster from the animal shelter.
I can't say whether the controls you use give that. mine do.
Happy Amp ́s Christian
GO FAST TURN RIGHT AND GET OUT OF MY WAY
Powercroco
UserOh, Mr. Dipl.Ing. .....🤣
Stupid question.
I'm sure no one will confuse me with Erwin except you.
I wrote clearly:
I wanted to sponsor the part to the pilot, since you can't do it or use your valuable resources elsewhere.
You should only say which engine I have to buy and answer the other questions about the setup in # 420.
But it seems you can't do that at all.
Because now it's up to the model builder again.
Was probably the last possible way out before the final dismantling of one of your edifices of lies.
If one reads your contribution, one understands why the gentlemen in question your academic qualifications so vehemently.
In any case, my wife has been
awarded a real Dipl. math. title by TUI lmenau (apparently in contrast to you) and yes, she is an honorary member of the board of the Gotha Animal Welfare Association and also voluntarily looks after the website of the animal shelter operated by this association.
Because now it fits the question again:
Which university of applied sciences awarded you your title of "mechanical engineer FH" and when?
Because you won't find this title anywhere else.
Your clever Hubert actually suspects that Teutleben is a suburb of Dresden and that I would have appropriated his stupid nick.
And you like to leave him in this belief, even though you know better.
Just as you apparently made him believe that your old waste plates were still with me, although you quittered their return in post 1400 MM BF 109 LANDING GEAR
Well - why do you think ?
You are just a particularly poor characterist.
But everyone who reads here has probably recognized that by now.
VG Ralph
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Nein, Ralph, du bist dumm! Du liest das hier nicht! Weißt du noch, Arschloch? Christian hat mir nichts gegeben. Du kannst auf Wikipedia nachschauen und erfahren, dass Putin dort jahrelang ein Bett gemacht hat. Deine Unterschriften bestätigen deinen arischen Stolz. Christian hat nichts damit zu tun, dass du ein rassistisches Sauerkraut bist. Ich wollte deinen Namen nicht erwähnen, aber noch einmal, weil ihr alle nichts anderes tut, als wie Schlampen zu streiten. Du redest hier über den Fortschritt, machst aber keinen. Du hast drei Tage lang herumgesessen und darauf gewartet, dass dieser Mann etwas sagt. Du bist so schwul. Bist du glücklich?
Danke,
HubertComment
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Was dein Idiot tun muss, ist, deine Magnete dünner zu machen oder den Luftspalt zu vergrößern. Diese Magnete sättigen den Stator mehr als. Mach dir keine Sorgen mehr um Christian und arbeite an dem Schwarz und Gold. George Forman grillt. Ich weiß, es stört dich, dass ich dir hier in Amerika das Wicklungsgeschäft wegnehme. Die Hubschrauber auf Helifreak sind als nächstes dran. Sie braucht nicht viel Mathematik, um die Haare auf deinem Kopf zu zählen. Sie sind 1 zu 1 mit deinem IQ. Niemand schert sich einen Dreck um diese Platten, du Idiot.
Aufrichtig
HubertComment
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Vielleicht findest du in einem weiteren Jahr den Mut, hier zu sprechen, Trottel
Und ich bin wieder bei dem, was ich tue, nämlich bessere Motoren mit höherer Effizienz und Leistungsdichte zu wickeln. Niemand interessiert sich mehr für die deutschen sozialen Medien, weil dort nichts weiter passiert als Idiotie und Ignoranz, wie sie zur Schau gestellt werden. Ich lese diese Threads nicht einmal, da sie die am wenigsten interessanten auf der Site sind. Sie machen dort viel Lärm, sind aber kaum die geschicktesten Modellbauer auf der Site.
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Gott sei Dank können die Amerikaner schlechte Ideen aufgeben … RC-network.de ist definitiv so etwas.
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Ich verdiene als Ingenieur viel Geld, indem ich Ihre alten Kunden abwerbe, also habe ich kein Problem damit, eine Laserwerkstatt zu rekrutieren. Ich brauche den ganzen christlichen Mist, den Sie ruiniert haben, sowieso nicht, ich wollte nur nicht, dass Sie ihn haben. Bei all dem Mist, den Sie reden, würde ich Ihnen an seiner Stelle auf den Hals treten. Sie wissen, dass der Grund, warum Sie nicht hier sind und reden, darin liegt, dass ich Ihren zerlumpten Mist auf eine Werkbank neben meiner laden werde. Ich weiß nicht, was Christians Problem ist, aber für mich sind Sie ein kleiner, kahler Snack!
You don't know a damn thing about electronics really! Your motor is at its end so now the minstrel show with Christain is all that remain.Comment
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