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Zitat:
Zitat von
mist
indeed a conversion of a factory configured motor with y winds is somehow more difficult compared to converting a delta-wound to y, because you have to open the housing, find the central node and seperate the wires (which is in turn easier than seperating the windings of delta wound motors, because one end of the coil is already open, whereas absolutely all wires have to be seperated from each other when converting delta ==> y)
"Hi,
Yes you have to remove it.Use deep coold and a hammer and a plasitik part that match the inside dia of the stator to bump it out. 12slot 8 pole is a basic 3 phas design better for high powerdensity is a 12 slot 10 pole design and the right stator plates cut out . Best here are the Scorpion HK serie motors. You know this video of the modelhelicopters lifting the lady , http://youtu.be/77uK19KxMuI . Each motor can do 10 KW and each heli can easy lift 30 kg ."
HKIII 4035
Anhang 68266
How about 3 or less turns at a minimum of 24 volts?
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Hi Hugh,
the 4035 is a real powerhouse. A shorter 4025 ,12N10P ,and 4x(2x1,18)YY i have does on 10S 3300 SLS Lipo surge 230 Amps with a airplanepropeller 7,5x12,5 .That are 7,2 kw close to 10 horses .So the 4035 can do moore .For an example i show you the stator wound with 6+5 turn 1,6 dia wire for Airplane see pic .This motor has only 514 kv so on 43,5 Volt it turns about 22350 rpm ,free amp 4,6 A .With this wire the motor can eat 180-200 A on 10S . This powerexamples are for 10 second burst maybe moore belong to the cooling.
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Hi Hugh,
You need some tools.
First the windingcalculator: http://www.rcgroups.com/forums/showp...&postcount=266 .
Second the how to wind: http://www.rcgroups.com/forums/showp...8&postcount=16 , download and run .
At rcgroups Jack will help you .
For 1400 kv you have to wind 2 turn on each statorarm so 4 turn per phase on one half of the stator. Then you have to wind the same 4 wind on the other side of the stator and connect this in parallel to the other side.
With the second tool you can get a pic of the windings. YY mean that every half of the stator is wound like a seperate full working motor and after both side are ready they are conected parallel.first pic of one half stator already wound .This can run.
And don't run the motor unload (over 65000 rpm) as the backiron of the scorpion bell with the magnets is softer iron as it can hold moore magnetic flux.This iron is very soft and at high speed the forc of the magnets will bend the bell,see pic. If you want higher rpm you have to wire a bell of cfk around the ironbell and the ironbell has to be cut in small polesections.
By the way i post here the pic of Andys new propellers you like to see.
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Zitat:
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Ch.Lucas
Hi,
The 4x(2x1,18) is AWG 17 or singel AWG 11 .so you want double kv than wind 2x(4xAWG17) .with this wire it is better to eworke with multistrandwire AWG 11 is not easy to wind as it's a strong rod.
To use thicker wire will cause higher eddycurrent in them and other amp related loss like proximity effekt for close high current wire.
http://de.wikipedia.org/wiki/American_Wire_Gauge .
Good day gentlemen,
Christian
Is this the diagram for the Y half parallel winding scheme? No interest in 4 phase delta or 6 phase operation? Or just no controllers to test them......
http://www.rc-raceboats.de/forum/att...1&d=1394272924
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Stator Prep
Anhang 68357
Christian,
Getting the wire off this stator was more than fun! Epoxy was on the wires making it difficult to remove from the stator. I did try to be gentle as I know you want to keep the insulating epoxy in place. It still chipped in a few places around the stator. How should I prep this for winding. I looked at the LRK wind and find it straight foward.Im Still trying to understand the YY.
Hubert.
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Hello Hugh,
sorry for my late response ,was skiing thursday and friday with my children and we have less snow in the alpes totaly different to the Stsates this year.
The yellow pic show YY system .It´s possible to drive each side with a seperate esc but you can switch them parallel on on esc.
The 12slot 10 pol and 14 pol system is a six phase system that can be driven by using the SPS (LRK) wireing with an 3 phase controler that switch double frequenz.
Best way is to go six phase with a six phase controler but there is no controler on the market. Some have test to wire two SPS winding systems like you see in the second pic. SPS start on statorarm 1 and goes to 3 and so every second arm.This motor has to conect to the first controler .Than start a second SPS motor starting from statorarm 2 and goes to 4 and so on to every second arm like befor. This second motor conect to a second esc . So now the motor has also two controler that drive with 30 degree offset like a realy sixphase motor. But note that the sensorless modelmotor esc have somtimes problems switching a singl SPS winding system and with the twin SPS system it can be a goal or the full disaster,burning the hole equipment.
Robert mean not different phase system he say that the delta to Y switching possibility is a great goal as you will have two motors in one .Lehner has this build in his motors . This is possible to do with every 3 phase motor.
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Stator tooth Question?
Anhang 68512Christian, If an eight pole 6 stator arm is more desirable than a 8 pole 12 stator.
Couldnt you wind just 2 - 6 arms then parallel them ? Seems this would allow you to use all 12 arms but maintain the better 8 pole 6 arm magnetic geometry? Maybe this you tried to explain. Im a bit ignorant to winding a motor. Your time and patience is greatly appreciated.
Thank you,
Hubert