this post was submitted on 18 Jan 2025
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Donut Lab's New Motor Brings Power to the Wheel Hub (spectrum.ieee.org)
submitted 4 days ago by [email protected] to c/technology
19 comments fedilink hide all child comments
 

The Finland-based company's in-wheel motor serves up 650 kilowatts of power

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[โ€“] JWBananas 29 points 4 days ago (2 children)

Yay, more unsprung weight! ๐Ÿ™„

Meanwhile in South Korea...

https://youtu.be/Nd6C0y8xc20

[โ€“] [email protected] 5 points 3 days ago* (last edited 3 days ago) (1 children)

Isn't that exactly the same idea though? The motor is now on the chassis, but the reduction gear is still a lot of weight.

Race cars have gone as far as having inboard brakes to reduce unsprung mass, moving the gearing out to the wheel is silly.

[โ€“] JWBananas 2 points 3 days ago

but the reduction gear is still a lot of weight.

But is it 88 pounds of weight like that donut motor? Because a traditional CV axle certainly isn't 88 pounds.

Race cars have gone as far as having inboard brakes to reduce unsprung mass

The uniwheel sort of did too, given regenerative braking.

[โ€“] Valmond 2 points 3 days ago

That looks super fragile and breakdown prone.