12 kw rc motor

[Arlo1]

did I scare everyone??

Haha Nope I am just waiting for my balls to come in and I am shoping for houses and about to drive down to help luke kick ass!

Arlo1 as you can see from above this is why toolman2 and I are really interested in your RPM measurement. Once we got to around 4 and 1/2 thousand RPM the motor became a heater, seems to be all due to timing.

I realy think you should look closer at all the bearings. I have one center bearing with a bad spot in it and it was causing my issues!
Just replace them all then try again. I will have to borrow a dual trace to test mine when I get it back together unfortuanatly it will be a couple weeks!

 

[tostino]

did I scare everyone??

Haha Nope I am just waiting for my balls to come in and I am shoping for houses and about to drive down to help luke kick ass!

Arlo1 as you can see from above this is why toolman2 and I are really interested in your RPM measurement. Once we got to around 4 and 1/2 thousand RPM the motor became a heater, seems to be all due to timing.

Did you ever test it with a sensorless RC controller??

 

[markobetti]

you have in the begining of the posts tests by hal with rc controller and his info

 

[SplinterOz]

Did you ever test it with a sensorless RC controller??

The only sensorless controller we have access to will only handle 6 LiPo's so it won't push the revs into the trouble zone.

 

[markobetti]

Splint you have pm

 

[liveforphysics]

If you could clamp it in a fixure, some thing that lets it piviot, and put a torque-arm bolted to the mount pushing on a scale, then we could spin the monster up with a big drill or some other power tool etc, obviously keep the phase wires from touching! See the weight increase on the scale, work out the distances from the pivot point etc, and calculate the loss torque as a function of RPM increase, we could get a pretty good handle on what we're up against.

 

[olaf-lampe]

If you could clamp it in a fixure, some thing that lets it piviot, and put a torque-arm bolted to the mount pushing on a scale, then we could spin the monster up with a big drill or some other power tool etc, obviously keep the phase wires from touching! See the weight increase on the scale, work out the distances from the pivot point etc, and calculate the loss torque as a function of RPM increase, we could get a pretty good handle on what we're up against.

Is there any AC-tool that does more than 3600rpm? I guess a dremel will do more, but its sure not powerfull enough.
It takes a medium size turnigy ( 6s/70A=1500W ESC will do ) to drive the monster above 9000rpm.
-Olaf

 

[liveforphysics]

If you could clamp it in a fixure, some thing that lets it piviot, and put a torque-arm bolted to the mount pushing on a scale, then we could spin the monster up with a big drill or some other power tool etc, obviously keep the phase wires from touching! See the weight increase on the scale, work out the distances from the pivot point etc, and calculate the loss torque as a function of RPM increase, we could get a pretty good handle on what we're up against.

Is there any AC-tool that does more than 3600rpm? I guess a dremel will do more, but its sure not powerfull enough.
It takes a medium size turnigy ( 6s/70A=1500W ESC will do ) to drive the monster above 9000rpm.
-Olaf

I've got a dewalt die-grinder that does 19,500rpm. It's 950w if I'm not mistaken, and likely under 50% efficient, so it's not going to be able to push the motor very high into it's problem areas, BUT, if we can just see the plot of RPM points leading up as high as we are able to collect data, it can show what order the effects are, which will show us the cause of the effects from looking at the signature of the curve.

 

[markobetti]

If you could clamp it in a fixure, some thing that lets it piviot, and put a torque-arm bolted to the mount pushing on a scale, then we could spin the monster up with a big drill or some other power tool etc, obviously keep the phase wires from touching! See the weight increase on the scale, work out the distances from the pivot point etc, and calculate the loss torque as a function of RPM increase, we could get a pretty good handle on what we're up against.

Is there any AC-tool that does more than 3600rpm? I guess a dremel will do more, but its sure not powerfull enough.
It takes a medium size turnigy ( 6s/70A=1500W ESC will do ) to drive the monster above 9000rpm.
-Olaf

Olaf , send me your phone number , check 7kw thread

 

[Arlo1]

My big power polisher spins fast I am not sure how much torque it has.

 

[jmygann]

motorcycle conversion using this motor ...

http://flickriver.com/photos/splinter/sets/72157623743935165/

can this motor run on 48-50 volts ?

 

[damcard]

Is there any AC-tool that does more than 3600rpm?

I had a 3 1/4 hp router that did well over 10,000 rpm. -Damcard

 

[SplinterOz]

motorcycle conversion using this motor ...

http://flickriver.com/photos/splinter/sets/72157623743935165/

can this motor run on 48-50 volts ?

Thanks that is my project.
Still in the everything is in pieces stage, however I now have everything but the batteries for the construction of the motorcycle.

This motor can run on 48-50 volts it is just that its top RPM is lower. Since the motor is 75 Kv free RPM at 50 volts would be 50 x 75 = 3750 RPM.

Hope that helps...

 

[jmygann]

could run at 10:1 48 volts .... something like this ....

http://i324.photobucket.com/albums/k328/briangv99/220620101102.jpg

 

[CroDriver]

I just purchased a new toy!

...but I really can't read the 70+ pages of this thread What are the experiences with this motor? What controllers are you using? I don't care about cost effectiveness, whats the baddest controller for this motor out there?

 

[olaf-lampe]

...but I really can't read the 70+ pages of this thread What are the experiences with this motor? What controllers are you using? I don't care about cost effectiveness, whats the baddest controller for this motor out there?

Haha, that's the reason why this thread is 70 pages long. No one has the answer yet, but some smart guys are on the track...
-Olaf

 

[Shenta]

isn't this motor can only run for 10min before it burn out?
you may want to try something like water cooling.

 

[markobetti]

Crodriver is just using it to measure the place for the big guy . He will get the one with cooling , this is instead of mockup

 

[markobetti]

isn't this motor can only run for 10min before it burn out?
you may want to try something like water cooling.

there is always an option to put fan on top - ventilator...

 

[markobetti]

I just purchased a new toy!

...but I really can't read the 70+ pages of this thread What are the experiences with this motor? What controllers are you using? I don't care about cost effectiveness, whats the baddest controller for this motor out there?

36 fet if you ask me is a possible option to do it with 4110 mosfet mods right now: http://www.endless-sphere.com/forums/viewtopic.php?f=31&t=20956

. If you ask Lifeforphysycs - he is developing like Jeremey the controller with some big ass Mosfets that are able to do incredible stuff

http://www.endless-sphere.com/forums/viewtopic.php?f=30&t=20867

Any updates guys ?

Also , you can buy kelly controller and ask to put two 32 bit processors in controller - to have bigger electrical rpm . I think they ask around 200-300 dollars more per controler to do this

Also , there are some crazy expensive controller options that are not considered as an option

 

[toolman2]

If you could clamp it in a fixure, some thing that lets it piviot, and put a torque-arm bolted to the mount pushing on a scale, then we could spin the monster up with a big drill or some other power tool etc, obviously keep the phase wires from touching! See the weight increase on the scale, work out the distances from the pivot point etc, and calculate the loss torque as a function of RPM increase, we could get a pretty good handle on what we're up against.

Is there any AC-tool that does more than 3600rpm? I guess a dremel will do more, but its sure not powerfull enough.
It takes a medium size turnigy ( 6s/70A=1500W ESC will do ) to drive the monster above 9000rpm.
-Olaf

I've got a dewalt die-grinder that does 19,500rpm. It's 950w if I'm not mistaken, and likely under 50% efficient, so it's not going to be able to push the motor very high into it's problem areas, BUT, if we can just see the plot of RPM points leading up as high as we are able to collect data, it can show what order the effects are, which will show us the cause of the effects from looking at the signature of the curve.

well yes, we were maby doing this.
we actually spun up the collosus by coupling the shaft to a turnigy motor, it got to a maximum of 5500rpm, the turnigy usually needs 3amps to do this, but needed 21amps total to drive the collosus, so 18amps required (about 1260w) eaten by collossus at 5500rpm.

i now believe we can do the same rpm with the collosus (with about the same draw) but require about 30-40deg of timing advance..

 

[Arlo1]

So now I need to get a 6 fet programible bord with varible regen coming! Anyone know of one that doesnt use the throtle for the varable part?
I have almost all the stuff I need to get this done! Special thanks to my sponcer :wink:

 

[markobetti]

WOW, GO aRLO !!!!

 

[markobetti]

This is really exciting.. Please document all stuff . I am really interested if the solution for fitting big fets to the board will be with that effect : Oh my god thats so easy ,....or ...good , thats complicated ... heheeh...
Also , there is one neat solution for controller... i posted it earlier on John in Cr thread..... Since you are going to use Watercooling with colossus you can put all fets(i dont know if this fets ever get hot? ) on this watercooled board and also use their waterpump: http://www.madshrimps.be/?action=getarticle&articID=975
Probably your aluminium heatsinks are enough...

 

[markobetti]

Anybody going for that pump and kit can get it directly from Taiwanese company : http://www.gbuintl.biz/index.php?lang=en
prices: