Mini Hub Motor

[The Riddler]

Hi I search a gearless Mini Hub motor for my experiments.
At the moment this motor could be a option:
http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&item=230617528065&fromMakeTrack=true&ssPageName=VIP:watchlink:top:de

Did anybody has experiences with this motor (Open it? High voltage Test...)

Thanks for the answers
Riddler
p.s My first choice was a Crystlyte but they stopped the production of 4 series motors.

 

[neptronix]

4.9kg for that little thing... really ?!

You should check out the MAC motors .. 3.9KG.. not too different in price.. and you can get replacement parts for them.
They're roughly the size of the old crystalyte 4xx.

 

[Drunkskunk]

Doesn't Cute still make a motor? I believe the Qf85 was 1.7Kg and a 250W motor.

 

[DAND214]

It list it as gearless. All the cute hubs are gear type.

I don't think a hub that small without the gears will pull much, even in a 16" wheel.

Dan

 

[neptronix]

I'm sorry. I misread. Usually that's called direct drive instead of gearless. I read geared ..!

Anyway, what Dan said. Small diameter hubs don't have much torque at all. The more diameter, the more torque. it's a cool looking motor, but IMHO waste of $..

 

[The Riddler]

Thanks for the answers.
But I don't want to use the Motor as a Hub-Motor.
It is planed to use the motor like on this bike
http://www.pedelecforum.de/forum/showthread.php?1999-eBike-mit-Tongxin-als-Kettenantrieb/page5

but with a high voltage (92V) and a higher current (Air cooling modifikation is also planed)
This is why the hub should be gearless (Normaly a Turnigy 180Kv Brushless Outrunner would be the better choice, but HobbyKing didn´t have one!) a normal Hub motor would also be Great (StokeMonkey Kit) but this could be a bit too Big if I use a GM motor (same Price class)

 

[liveforphysics]

There is a tiny little hubmotor that does use a large reduction, but does it with smooth toothless rollers that engage with friction alone, and provide something like a 5:1 reduction, and they call it a "gearless reduction" or something goofy like that. I think this is what you're seeing.

 

[grindz145]

Pretty impressed with the cute 100, if treated with care and used properly. Very light, could lighten it up by swiss cheesing the side covers too http://endless-sphere.com/forums/viewtopic.php?f=3&t=32364&hilit=+trek

 

[John in CR]

GoldenMotor has a small direct drive hubbie like that. My concern about both this the low peak efficiency, both below 80%, which may indicate a quality problem. Someone got one over in the motor section of the forum, but I don't recall him coming back to us with feedback. Maybe the motor will do better at higher voltage, so maybe it's worth a try.

 

[amberwolf]

There is a tiny little hubmotor that does use a large reduction, but does it with smooth toothless rollers that engage with friction alone, and provide something like a 5:1 reduction, and they call it a "gearless reduction" or something goofy like that. I think this is what you're seeing.

The TongXin I have is like that. Currie used some on some hub-motor versions of their bikes.

 

[dogman dan]

FWIW, you can still get a 407 equivilant hubmotor from High Tek bikes. The aotema is sensorless though, so you'd have to add some halls to it to use a sensored controller.

 

[The Riddler]

I´ve found a Dealer
Picture from ebay:


Google search : Con his motor = http://www.conhismotor.com

Send Conhis team a E-Mail
and the Result

View attachment 2



What could be the best choice (V and W) ? In my opinion it is 36V 350w

 

[kmxtornado]

No, I have not had experience with that motor but it seems high for the price. I'm a newb at this stuff, so take what I say with a grain of salt as they say, but it's only a 24v system and remember you gotta spend additional money on:

- spokes
- rim
- labor to build the wheel if you don't do it yourself.

That can cost another $200 easy. I had a rear wheel built for my recumbent trike and the labor alone was $155 including truing. It did not include the cost for the hub nor the rim, both of which I supplied. Just a warning so you don't go spending a bit and realize later you'll have to spend tons just to get it to work.

 

[The Riddler]

HI kmxtornado thanks for the welfare, but this is my third e bike projekt with Hub motors so I know that there are large extra kosts but next to this I have not planed to use the Hub motor as a hub moto :wink: (see my earlier post)

 

[kmxtornado]

3rd eh? That's awesome. Hope to see some of your work on the forum. Maybe you can fill up your signature with some new threads or links to photos.

 

[The Riddler]

http://endless-sphere.com/forums/viewtopic.php?f=6&t=33946

 

[tuxman]

But I don't want to use the Motor as a Hub-Motor...
... high voltage (92V) and a higher current (Air cooling modification is also planed)

So you want to use a 24v hub motor for a chain drive bike at 92v? Good luck. Just might want to consider:

http://www.ebikes.ca/store/store_stokemonkey.php

http://www.cyclone-tw.com/index.html

http://www.electricscooterparts.com/motors60volt.html

 

[cwah]

So what motor have you finally purchased?