Is One Really Better Than The Other On An Electric Skatebaord?

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Mithion   10 W

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Is One Really Better Than The Other On An Electric Skatebaord?

Post by Mithion » Jul 05 2018 8:04am

Belt drive vs Hub on an electric skateboard?

My question is, the same rated motor in belt vs hub, would you get the same speed, acceleration etc?

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ElectricGod   10 MW

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Re: Is One Really Better Than The Other On An Electric Skatebaord?

Post by ElectricGod » Jul 05 2018 11:51am

A hub motor fits inside the wheel. A belt implies your motor has a sprocket on it that drives a belt and then the wheel also has a sprocket on it that is driven by the belt.

A hub motor of any kind is a fixed quantity. Whatever it's KV is will determine it's maximum RPM at whatever your pack voltage is. That's all the faster the wheels will turn. The only "gearing" you have is larger or smaller diameter tires. A smaller tire will mean a bit more torque and a larger tire means a bit more top speed. There's not exactly a large selection of skateboard hub motors.

With belt drive and probably an outrunner, you can change the gear ratios to get more torque or more top speed...within limits of course. You can also use different sized tires, Outrunner motors are abundant in many sizes and Kv's from dozens of manufacturers.

A hub in wheel design is simple and clean since there is no need for a belt and gearing, but it's also pretty much a fixed quantity with little room to make it different or better. With outrunners and gearing, you can swap out the motors and gearing easily, if you want more speed or power or a bigger motor. None of that is as possible with a hub since the selection of hubs for skate boards is really limited.
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made_in_the_alps_legacy   10 kW

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Re: Is One Really Better Than The Other On An Electric Skatebaord?

Post by made_in_the_alps_legacy » Jul 16 2018 12:51pm

Mithion wrote:
Jul 05 2018 8:04am
Belt drive vs Hub on an electric skateboard?

My question is, the same rated motor in belt vs hub, would you get the same speed, acceleration etc?
I would say it depends on how you work out your transmission ratio so that the speed, acceleration, etc could be the same between belt/hub
( ...interresting brain teaser actually: 1:1 ratio w. same wheels, same kV, same outrunner motor outer diameter)
without going through the whole history of e-skateboarding that find its roots in ES like 10 years ago,
the e-skateboard story went somehow the opposite way as the e-bike (commercial e-bikes are mostly mid drive, not many hub left :
more and more hub e-skate,unless you look at big wheeled e-mountain boards.

John in CR   100 GW

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Re: Is One Really Better Than The Other On An Electric Skatebaord?

Post by John in CR » Aug 08 2018 8:01am

made_in_the_alps_legacy wrote:
Jul 16 2018 12:51pm
...commercial e-bikes are mostly mid drive, not many hub left...
Hubmotors dominate the market by a very wide margin, like 10's of millions of units a year. Sure the big bicycle manufacturers have entered the market with over-priced mid-drive offerings, but it remains a small portion of worldwide production.


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