$22 motor for ebikes. What do you think?

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brunomchd94   1 µW

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$22 motor for ebikes. What do you think?

Post by brunomchd94 » Mar 05 2018 2:49pm

I saw this ad on Aliexpress (http://s.aliexpress.com/fYFRzQN7?fromSns=) where they sell a 288W / 24V DC motor for 22 dollars. I thought about buying it and using it as a friction drive on the wheel of my bike. Since it has 12000 rpm, I would have to make a reduction of an average 1:60 to get 250 rpm on the bike wheel and have torque to move it. For this, the axle would have to have only 1 cm and be in contact with the tire of 60cm. Do you think it would work? Had she enough friction?

markz   100 GW

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Re: $22 motor for ebikes. What do you think?

Post by markz » Mar 05 2018 4:25pm

I dont know about that, I really do not know.
You could scrounge garage sales and look for a circular saw.
I believe SpinningMagnets did one just for fun.
Even though they are corded and use AC voltage, if I am not mistaken they could be run on DC voltage.

Next best option is the Unite Motors, $40usd inc s/h
250W 24V MY1016-Y No.B010583
https://www.ebay.com/itm/Unite-Motor-El ... SwVDZaAg0v

Or
https://www.ebay.com/itm/450W-24V-elect ... SwrLxaji3h

A better step up would be the real deal
YESCOMUSA for $190usd + $71usd for s/h

or look on the online classifieds on Craigslist or in Canada Kijiji or right here on ES website.

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wturber   100 kW

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Re: $22 motor for ebikes. What do you think?

Post by wturber » Mar 05 2018 4:52pm

brunomchd94 wrote:
Mar 05 2018 2:49pm
I saw this ad on Aliexpress (http://s.aliexpress.com/fYFRzQN7?fromSns=) where they sell a 288W / 24V DC motor for 22 dollars. I thought about buying it and using it as a friction drive on the wheel of my bike. Since it has 12000 rpm, I would have to make a reduction of an average 1:60 to get 250 rpm on the bike wheel and have torque to move it. For this, the axle would have to have only 1 cm and be in contact with the tire of 60cm. Do you think it would work? Had she enough friction?
If you just like the idea of that kind of DIY odd-ball project, then give it a try and let us know. If you want to build an e-bike cheaply, there are better ways.
"Commuter - DC Booster"
Iron Horse 3.0 hardtail - 48V / 1000W / 470rpm generic Chinese DD Hub motor (ebay)
8 x 36v 4.3ah 10s 2P battery packs - 1500W 30A DC Boost Converter delivers 54v and about 1000 watts peak
53T/42T Sakae Road cranks - 30mph+ on flats
viewtopic.php?f=2&t=90369

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Dauntless   100 GW

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Re: $22 motor for ebikes. What do you think?

Post by Dauntless » Mar 05 2018 11:09pm

I think Mr. Magnets has the right idea, but this is the wrong motor. 288w at 12,000rpm, too fast and too low power. Keep looking.
Any sufficiently advanced technology is INDISTINGUISHABLE FROM MAGIC!
- Arthur C. Clarke

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amberwolf   100 GW

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Re: $22 motor for ebikes. What do you think?

Post by amberwolf » Mar 06 2018 3:41am

IIRC, any roller drive on a tire is going to have to roll at the same rate you want to roll along; as if it was actually rolling on the ground itself rather than the tire.

So if you have a really high RPM motor you'd have to have an external reduction (not using the tire for that) that drives a roller that drives the tire.

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dogman dan   100 GW

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Re: $22 motor for ebikes. What do you think?

Post by dogman dan » Mar 06 2018 8:37am

For that kind of project, free from the trash pile on pickup day is the right price. 8)

Cordless drill, saw, etc would run on 12-18v.

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eCue   10 kW

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Re: $22 motor for ebikes. What do you think?

Post by eCue » Mar 13 2018 9:56am

A car alternator comes to mind



The alternator process is easier if you use a Delta configured alternator

Solar charge station on wheels join the Revolution

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