| Author |
 Topic  |
|
balltip
Starting Member
Sweden
5 Posts |
 Posted - 02/09/2008 : 18:58:59
|
Yikes! Shipping halfway around the world was way more than I figured - a whopping 3x the cost of the motor itself or $228 AU. Good thing was that, through a little help, I managed to locate a *local* dealer selling a similar product over the counter. In Gothenburg. Where I was going tomorrow anyway.
I might go shopping... |
 |
|
|
gotwind
Forum Admin
United Kingdom
1564 Posts |
Posted - 02/09/2008 : 19:16:14
|
Good luck with that balltip.
Please keep us posted on how you get on.
Ben. |
|
|
|
BushWhacker
Junior Member
Canada
359 Posts |
Posted - 03/09/2008 : 04:00:06
|
Hello Balltip, welcome to Gotwind!
$77 is an excellent price but the shipping is what would make me worry. I have a Crytalyte hub http://www.crystalyte.com/ (Click on the Crystalyte Front Wheel Motor link on the left menu) that I have put to work but built a Savonius turbine that is just a little too small. 12.5 volts takes about 85 rpm if I recall. If you spin these hubs up they can produce some pretty high voltage as well. There are a couple of people running the 36 volt hubs at 96 volts (and insane speeds for a bike) in Calgary.
My hub is brushed and I bought the kit for a discount because some components were missing to make an E-bike. I also paid about triple your price in $CDN.
I hope that helps a bit,
BW
Everything should be made as simple as possible, but not one bit simpler. - Albert Einstein |
|
|
|
balltip
Starting Member
Sweden
5 Posts |
Posted - 03/09/2008 : 06:25:50
|
Thank you for your welcome fellas!
I really do not want to hijack Andys thread but as I already have (sorry!) I might go ahead and ask something about hub motors and their conversion to alternators.
Is *the* method for mounting the blades to clamp down the axle and have the hub spin? I could imagine clamping down the hub, have the axle spin and take care of the wiring through a slipring construction. Andys solution looks absolutely great though and I might be overengineering things now. |
|
|
|
Andycap
Starting Member
United Kingdom
9 Posts |
Posted - 04/09/2008 : 13:53:17
|
Hi Balltip.
Sorry about the late reply, I have been away from the PC for a few days due to work commitments. I think it is great that you are going to have a go at a turbine using a cycle hub, mine is still working really well and yesterday it peaked to 19.51 amps in some quite fresh winds.
I just kept checking on ebay until I found a hub in my price range, I waited about three months trying to get one.
I do have electric bikes that I use for commuting to work and also for pleasure, so I already knew the capabilities of the hub motors.
Don't worry about hijacking the thread, it is here for us all to chat about hub motors.
Cheers. Andy.
|
|
|
|
balltip
Starting Member
Sweden
5 Posts |
Posted - 04/09/2008 : 15:53:05
|
Hello Andy!
No worries, I know people do not live in front of their computers. 
Yeah, I am currently looking for something that might suit my needs. Just today I found another thread here on gotwind, and in it I read that brushless hub motors need more rpm to generate anything useful.
Darn...
Double that darn, since I only this morning located a used hub motor locally that would only cost me £45 or so. Naturally it is brushless...!
I might go get it anyway since the seller gave half a promise that if I was not happy with it I could always return it. Guess I could find a way to rig it up in my lathe and see what it does. |
|
|
|
gotwind
Forum Admin
United Kingdom
1564 Posts |
Posted - 04/09/2008 : 16:09:44
|
Its worth a try balltip for that price.
It may be o.k for 6v charging, large traction batteries are 6 volt, but not many usefull things run on 6v unfortunatly, be o.k for lighting, LEDs et.c
Ben. |
|
|
|
klimb2hi
Starting Member
Reunion Island
17 Posts |
|
|
Andycap
Starting Member
United Kingdom
9 Posts |
Posted - 05/09/2008 : 17:27:16
|
Hi Balltip.
I would certainly give that brushless hub a try, even brushless it would be wound for low rpm. I was origionally looking for a brushless gearless hub motor to try but the one I have came along so went for it.
Do you know what voltage it is ment for, there are different ones at different voltages ie 24v, 36v, 48v, 72v. The higher the origional design voltage the better it should be at lower rpm.
If all else fails, you could build it into a bike and have some GREEN transport. :)
Andy.
|
|
|
|
balltip
Starting Member
Sweden
5 Posts |
Posted - 05/09/2008 : 21:27:18
|
Fellas, I think you are right. I'll see if I can't pick it up next week. I know that at least one other person got hold of a similar motor and he has promised to run a few tests as soon as he can.
The motor I am considering is a 36V motor.
Andy, what wires did you use on yours? I know that the question might not be relevant as they are different beasts. The reason why I ask is becuase I have not seen "my" motor yet, but I think it has five wires coming out of it. Is it just a matter of spinning and measuring to find out what the different wires give?
|
|
|
|
Andycap
Starting Member
United Kingdom
9 Posts |
 Posted - 06/09/2008 : 22:30:11
|
Hi Balltip.
My motor only had two wires out of it with it being a brushed DC motor. Your motor will probably have three wires of same thickness but different colours and also 2 thinner wires that would normally be connected to a hall effect sensor, those are used on a bike controller to measure the motor speed and let the controller know the current position of the motor. The hall effect wires will not be needed to opperate as a generator but could come in useful if you wanted to measure the rpm of the blades.
I have read about the connections needed from a brushless motor but cannot remember the details at the moment, there will be plenty of people on here that will be able to advise you on how to connect the three phase wires up to rectifiers to give you DC output.
Please keep posting with your progress because I for one am really interested in how it will perform and if it is better than the geared brushed one that I am currently using.
Cheers. Andy.
|
Edited by - Andycap on 06/09/2008 22:36:38 |
|
|
|
Topic |
|
Home built turbine using 36v bicycle hub