Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Tiny electric motor can produce more than 1,000 horsepower

supercarblondie.com

Post reply on HN
Print view View original

191–200 of 616 posts

Re: Tiny electric motor can produce more than 1,000 horsepower

#191

Post by infogulch »

b112 wrote: post #35
poniko wrote: post #9

Earlier quoted context omitted.

Yea that's the thing right, the battery is so very much of the weight that optimizing the other parts are "meh" at this point. What is cool is that the 600Wh/kg solid state batteries seems like they are really finally here soon :) i.e removing 200-300kg from a car in one go will be a game changer.

No wonder electrics don't sell well in the US. People weigh more, you're basically saying that leaving grandma at home, is a "game changer".

True! If only grandma wouldn't insist on bringing 250kg of weapons and ammunition with her everywhere I'd get much better range in my EV, but alas this is the USA.

Re: Tiny electric motor can produce more than 1,000 horsepower

#192

Post by Someone »

exasperaited wrote: post #109
thelastgallon wrote: post #76

Earlier quoted context omitted.

But why limit only to cars? Can this be used for motorcycles, e-bikes, electric buses, train wheels, e-unicycles, electric golf carts, etc? There are probably a range of application where in-wheel makes perfect sense.

Motorcycles I could imagine. Do e-bikes really need significantly more power than they have? They already run arguably dangerously fast for their application. Is efficiency not the primary target there?

They don’t need this motor, but if it can be scaled down… at over 10kW/kg sustained, one could wish/hope to get 200W at 50g (disclaimer: I have no idea how this scales with size). Combine that with 1kg of a 600Wh/kg battery (https://news.ycombinator.com/item?id=45797452. Again, I have no idea how realistic that is), and you have a bicycle that’s only a little heavier than a non-electric one, but gives you a boost for 3 hours (more if you use it sparingly. If you’re cycling at leisure, 100W already is a lot of power)

Re: Tiny electric motor can produce more than 1,000 horsepower

#193

Post by Etheryte »

hireshbrem wrote: post #182

Feels like a vanity metric, electric car companies don't boast about their cars having X horsepower. Not many people care about horsepower because either way there are speed limits on the road. I think electric motors should focus on other vectors.

Every car listing, review and so on mentions either the bhp or kW, along with the 0-100km/h or 0-60mph which is functionally the same as listing the horsepower to weight ratio.

Re: Tiny electric motor can produce more than 1,000 horsepower

#194

Post by mlhpdx »

tckk wrote: post #94
thelastgallon wrote: post #76

Earlier quoted context omitted.

But why limit only to cars? Can this be used for motorcycles, e-bikes, electric buses, train wheels, e-unicycles, electric golf carts, etc? There are probably a range of application where in-wheel makes perfect sense.

Donut Labs markets a whole suite of axial flux motors. Sized from scooters through to large trucks. But no public pricing.

And thrusters for boats as well, IIRC.

Re: Tiny electric motor can produce more than 1,000 horsepower

#196

Post by binary132 »

thelastgallon wrote: post #76
rob74 wrote: post #37

Earlier quoted context omitted.

Ok, now I understand why this motor is only used in supercars - installing four (or even only two - according to https://www.mercedes-benz.de/passengercars/technology/concep... , even the AMG GT-XX has "only" three of them) hub motors with twice the power of a Tesla Model 3 in any other car would be ridiculous. So, the actual challenge is to make this motor even smaller while keeping the same power to weight ratio, s…

But why limit only to cars? Can this be used for motorcycles, e-bikes, electric buses, train wheels, e-unicycles, electric golf carts, etc? There are probably a range of application where in-wheel makes perfect sense.

Yeah, my first thought was racing EUC’s, lol….

Re: Tiny electric motor can produce more than 1,000 horsepower

#197

Post by JKCalhoun »

davedx wrote: post #6

Could lead to significant efficiency gains for EV's, because 1/4 of the motor weight means better power-to-weight ratio... a lot of things will automatically get better. YASA was founded in 2009, a spin out from Oxford University following the PhD of founder and still CTO, Dr Tim Woolmer. "Over the decades that followed both of these technologies were explored. But despite the potential for weight reduction, smaller…

I'm more excited about light electric vehicles. (Bikes, tuk-tuks, what-have-you).

Re: Tiny electric motor can produce more than 1,000 horsepower

#198

Post by lunias »

davedx wrote: post #6

Could lead to significant efficiency gains for EV's, because 1/4 of the motor weight means better power-to-weight ratio... a lot of things will automatically get better. YASA was founded in 2009, a spin out from Oxford University following the PhD of founder and still CTO, Dr Tim Woolmer. "Over the decades that followed both of these technologies were explored. But despite the potential for weight reduction, smaller…

I wish more people on the road realized the extent to which weight reduction improves all aspects of the driving experience... it really does compound unlike any other change that you can make to a vehicle. IMO heavy vehicles are a scam and the antithesis of the direction we should be moving.

Re: Tiny electric motor can produce more than 1,000 horsepower

#199

Post by JKCalhoun »

varispeed wrote: post #115
exasperaited wrote: post #109

Earlier quoted context omitted.

Motorcycles I could imagine. Do e-bikes really need significantly more power than they have? They already run arguably dangerously fast for their application. Is efficiency not the primary target there?

If engine can be produced cheaply, can it be limited "in software"? It's like saying people shouldn't use Rasberry Pi to blink an LED.

Yeah, you kind of shouldn't use a Raspberry Pi to blink an LED, though. Great "Hello World" project. But there are so many ways that are cheaper, lighter, smaller and more reliable (and don't require a lengthy boot-up).
Post reply on HN