12 kw rc motor

[patrickza]

I'm putting together some CAD sketches of coupling together 12 of these motors along the belly-pan of a lotus 7 kit to make an EV.

Luke I've thought of this a couple f times since I saw the diyev guys using coupled 9" motors. How would this work with an ac system, would each motor need it's own controller?

[markobetti]

I LIKE THAT MOTOR ! UP ON THE PICTURE HEY GUYS , ON APRIL 19 WE WILL HAVE ALL NEW MOTORS THAT HAL REDESIGNED : -HALL SENSORED , LIQUID COOLED (USE IT WITH OR WITHOUT IT ) . AND JUST TO TELL YA , HALL ALREADY MADE MOUNTS FOR CONNECTING 2 , 3 ,4 ,5 ... MOTORS TOGETHER AND A FEW MINOR CHANGES

[MitchJi]

Hi Luke,

Would this make more sense (similar power and maybe similar price)?

Maybe Mitch, but then I need a $$$ HV controller, and a step-down gear box (and it's noise and complexity).

I was wrong about the price.

Much much higher (something like 5x) .

I really like your idea of a Super 7 EV .

[cell_man]

I LIKE THAT MOTOR ! UP ON THE PICTURE HEY GUYS , ON APRIL 19 WE WILL HAVE ALL NEW MOTORS THAT HAL REDESIGNED : -HALL SENSORED , LIQUID COOLED (USE IT WITH OR WITHOUT IT ) . AND JUST TO TELL YA , HALL ALREADY MADE MOUNTS FOR CONNECTING 2 , 3 ,4 ,5 ... MOTORS TOGETHER AND A FEW MINOR CHANGES

I'm definitely interested in 1 or 2 of these. Let us know how we can go about getting them ordered.

[nertog]

I'm certainly in for 1 if it's possible to convert this motor from DELTA to WYE (if it's wired in DELTA by default). My goal is to use this motor to power a paraglider prop of 48". Around 45kv would be ideal for this. Anyone knows if it's possible to convert any outrunner from delta to wye? And why are outrunners always factory wired into delta? Sorry for all the questions...I'm an e. engineer but pretty new to high powered BLDC's.

Looking forward to see the new motor design! Can't wait to get one

[liveforphysics]

I'm certainly in for 1 if it's possible to convert this motor from DELTA to WYE (if it's wired in DELTA by default). My goal is to use this motor to power a paraglider prop of 48". Around 45kv would be ideal for this. Anyone knows if it's possible to convert any outrunner from delta to wye? And why are outrunners always factory wired into delta? Sorry for all the questions...I'm an e. engineer but pretty new to high powered BLDC's.

Looking forward to see the new motor design! Can't wait to get one

Delta doesn't require connecting any wires, just bundle the 6 ends of the 3 wires together in the correct pairs, shrink wrap them together in a bundle, and call it a day.
Every RC delta motor can be turned into a wye motor. However, some wye motor's don't make proper delta-motors.

[nertog]

markobetti/hall: is this motor wired in delta or wye configuration?

[HAL9000v2.0]

I finally get out of the dungeon...
So, the motor design is finished. We are waiting for the prototypes. They should be here by the end of the month..
I made some modifications on the original motor. The dimensions will be the same but the shaft exits on other end.
splined exit shaft make it more expencive so it will probably have just a slot.
Also there will be hall sensors and KTY 83-122 thermistor build in.
The water cooling system is also included.
Some cooling data. minimum channel diameter is 28,3mm^2
minimum liquid contact area is >16000mm^2
motor is delta but it is no problem to leave all wires outside.
5 support bearings system with some Japan bearings. (We specialy asked for the best bearings they can find, also we asked for bearings manufactures certificate)
Don't know exit wire dia jet.

We have here two sayings that accurately display how I am feeling right now.
1. "Sitting on the nails..."
2. "too have worms in my B..t "

And the most important our goal is to have price under 300$

here are some dimensions.

http://www.greyb.org/collossus/dimenzije.pdf

[TylerDurden]

That looks great.

Could the output shaft be longer, to allow a bearing on the end, beyond the hub/collar?

It is easier to cut off excess, than to add more shaft.

Just wondering...

[markobetti]

why do you need more shaft , cant you se the extra part for shaft that hal made . That motor s going to be a rocket :):) Hal i didnt visualise it like that. I now can see the original cover changed, now it looks evil enough to beat plletenberg 30 and just maybe with that cooling get to the power of 37 !! okay its bigger , but who cares it looks better

[TylerDurden]

why do you need more shaft , cant you se the extra part for shaft that hal made .

The magenta part looks like a sprocket flange.

I'm suggesting enough shaft to support the shaft on both sides of the sprocket.

[patrickza]

Great work guys, this is one of the most exciting things on ES at the moment, especially when you consider the possibility of joining multiple motors together. I'd love more info on how that'll be done Hal. Can't wait to see what creations this spawns!

[HAL9000v2.0]

I think the shaft can be longer, but AFAIK there is no need, it is 20 mm dia. It is made out of 1" steel rod. so It is no problem to make new one. the reason for big thread (M10) inside shaft is also that you can make aditional part of the shaft so you can conenct two motora with shafts to have single sprocket or you can make support bearing os you can connect to back of another motor with adaprer.
The magenta part is connection part for two motots. from one side it firs shaft and form another it fits rotor. Actualy it fits some bike sprockets but not all. You have to make motor support only. But I am drawing now interconecting part with additional support bearing( not because we need it, yet because i want to make part that connects barrels with shaft and also uses as support...

[Tiberius]

Marko, Hal,

Nice work.

Do you have the other motor parameters, such as winding resistance and max speed?
I think you said Kv=75, is that still correct?

Nick

[michaelplogue]

Put me down for two of the sensored version please......

[markobetti]

Marko, Hal,

Nice work.

Do you have the other motor parameters, such as winding resistance and max speed?
I think you said Kv=75, is that still correct?

Nick

kv : 75 is correct , as we are aware

[HAL9000v2.0]

All data I will put by the end of the month. I hope so.
There will be only one version and you can use them at least on 6 different ways. sensorless, sensored, watercooled, naturalcooled, To know how hot it is or to not know. And of coure all combination of this...

[12p3phPMDC]

That is fanatastic, great work Markobetti and HAL9000!

How is the water cooling done? Is there a tube in the valley of each slot below the windings?
Do the tubes terminate in a header/manifold? or is it one continuous tube?

Thanks for this effort, it's turning into a great motor!

Water cooling will be awesome!

[cell_man]

These motors are getting better and better. Good work guys

[liveforphysics]

I'm thinking of getting 9. 8 for me, 1 for KiM.

-Luke

[michaelplogue]

Would you be willing to make available your 3D model in a common format (such as OBJ)? I'd like to start playing around with mounting options.........

[12p3phPMDC]

Now we need some little high performance magnetically coupled water pumps and little heater cores for radiators!!

I wonder what kind of power you can get from a water cooled astro or HXT?

Somethings aren't worth the complexity, but
What would the limits be...? speed?

[liveforphysics]

I think the power level should be able to be doubled or more with the water cooling. It depends on how the passages are routed, but this is an exciting time to be doing an EV motorcycle or light car conversion.

The fittings for the water cooling, something like -6AN/JIC would be perfect.


With a motor like this, for a bicycle, I think we can forget about needing gearing, slip a pair of broached ENO's over a quality strong rear hub, have a reasonable single stage reduction, like 7:1 perhaps. The sensors enable running real controllers at real voltages. This makes doing serious e-bikes so much more simple, cheaper and so much more potent than they were before this motor.

[nertog]

The dimensions will be the same but the shaft exits on other end.

motor is delta but it is no problem to leave all wires outside.

I agree that a fair bit of shaft length on both sides would be very nice. I don't think it adds much to the production costs and it will save some people a lot of trouble.

All wires outside would be great. The more options for us to choose, the better!

Thanks for the efforts! This seems to become a very promising product!!

[12p3phPMDC]

I agree, -6AN/JIC would be just about perfect, black anodized. Some push lock Aeroquip hose and your golden. No hose clamps!
A little Al radiator with weld on -6AN would be nice along with a little swirl pot and pressure cap....
Double the power would be amazing power density even with the extra complexity.