engine HUB vs engine center

General Discussion about large electric scooters and motorcycles and other things with no pedals.
Post Reply
TUNA0026   1 µW

1 µW
Posts: 4
Joined: Sep 20 2018 9:20pm

engine HUB vs engine center

Post by TUNA0026 » Sep 20 2018 10:09pm

hello boys ... I'm in the process of making my electric motorcycle ... but I do not know which motor to put ... HUB engine or central engine ... the motorcycle weighs approximately 20kg design format choper cruise rwheel fat bike de 26 ". ... I was thinking about an engine 3kw ... is a motorbike ride, but I want power and speed when required, do not go more than 90km / hs and have torque to climb slopes without problems ... I read that the hub engines do not have much torque and come just for e-bike or am I wrong? Which of the two engines is better? Thank you

User avatar
Dauntless   100 GW

100 GW
Posts: 6765
Joined: May 29 2010 1:49am
Location: Coordinates: 33°52′48″N 117°55′43″W

Re: engine HUB vs engine center

Post by Dauntless » Sep 20 2018 10:41pm

Sounds like it's a bike that 3kw should do all you need. Hub would be simple and probably plenty for that little thing
Any sufficiently advanced technology is INDISTINGUISHABLE FROM MAGIC!
- Arthur C. Clarke

TilmanBaumann   10 W

10 W
Posts: 82
Joined: Feb 15 2018 10:32am

Re: engine HUB vs engine center

Post by TilmanBaumann » Sep 21 2018 4:28am

I'm rebuilding an electric scooter with mid-engine configuration. I can tell you it's not worth the effort.
Hub motor is the way to go.

3kW sees a little on the weak side. But for a light motorcycle, it's probably ok. (Something that had 80-125cc in its previous life will run ok with that)
In Europe light motorbikes are allowed up to 11kW and mopeds up to 4kW, you got some room there. :wink:

But engine power isn't usually a significant limiting factor. Just select one that has the right speed and voltage rating for your power system.
What will likely limit you more (especially in acceleration) is your motor controller. Overspec that by a lot if you can and allow high peak currents.

PS: Your bike weighs 20kg with batteries? wow, that is light.

TUNA0026   1 µW

1 µW
Posts: 4
Joined: Sep 20 2018 9:20pm

Re: engine HUB vs engine center

Post by TUNA0026 » Sep 21 2018 7:10am

Perfect ... Then a motor HUB of 5000w and battery of 72v 30ah will be fine? Only the box with its accessories weighs 20kg without battery or controller ... the hub motors mostly come with one side to put a chain crown so I think it's only for bicycles ... Will it also be for constant use? There will be no problems? Thanks for your reply

TilmanBaumann   10 W

10 W
Posts: 82
Joined: Feb 15 2018 10:32am

Re: engine HUB vs engine center

Post by TilmanBaumann » Sep 21 2018 7:13am

Sounds like a good setup to me.

Hub motors should theoretically have better (air) cooling, better torque and be more silent.

User avatar
flippy   10 kW

10 kW
Posts: 851
Joined: Aug 12 2015 3:07pm

Re: engine HUB vs engine center

Post by flippy » Sep 22 2018 7:13am

Hub motor.

/thread
Lithium beats liquid dinosaurs.

TUNA0026   1 µW

1 µW
Posts: 4
Joined: Sep 20 2018 9:20pm

Re: engine HUB vs engine center

Post by TUNA0026 » Sep 22 2018 7:15am

Thanks for your opinion :)

User avatar
flippy   10 kW

10 kW
Posts: 851
Joined: Aug 12 2015 3:07pm

Re: engine HUB vs engine center

Post by flippy » Sep 22 2018 2:37pm

TUNA0026 wrote:
Sep 22 2018 7:15am
Thanks for your opinion :)
anytime :mrgreen:
Lithium beats liquid dinosaurs.

SlowCo   10 kW

10 kW
Posts: 906
Joined: Jan 05 2015 5:43pm
Location: The Netherlands

Re: engine HUB vs engine center

Post by SlowCo » Sep 23 2018 2:52pm


Post Reply