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Tiny electric motor can produce more than 1,000 horsepower

supercarblondie.com

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

#501

Post by jacquesm »

loeg wrote: post #481
Empact wrote: post #354

Earlier quoted context omitted.

This, or a miniaturized version thereof could change the game for light electric vehicles - imagine an electric motorcycle that weighs substantially more like an electric bicycle. Right now it takes about 10-15lbs of motor to produce a 3KW motor for an electric bike, this motor is about 10 times that in power density afaict. The Livewire electric motorcycles use something like 100-200 lbs of motor to produce 1/4 as m…

The problem for electric motorcycles is the battery weight.

Indeed, more so because that weight tends to be further off the ground than in a car.

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

#502

Post by jesse__ »

benlivengood wrote: post #486

You could almost replace the disc brakes with these and have hub motors for free (in terms of unsprung weight). Depends on the torque and safety margin on the 700KW level of performance. For emergency safety you could have a mechanical short to let the motors dump energy into a big heating element as a last resort (risking wheel lockup) but this would truly be drive-by-wire braking.

> For emergency safety you could have a mechanical short to let the motors dump energy into a big heating element as a last resort

That would be craaaazyyyy!! I'm imagining drag cars literally blowing liquid metal out the back when they brake hard..

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

#503

Post by jacquesm »

RajT88 wrote: post #499
jacquesm wrote: post #465

Earlier quoted context omitted.

A kid died right in front of my door on one of those. They call them fatbikes around here and they're super dangerous to operate. Way too much torque and speed for kids (and, fairly, most adults) to handle responsibly.

See - you nailed it. I did plenty of dumb shit when I was a kid, but like the specific number I quoted - 13mph - wiping out at that speed, which I have numerous times even as an adult - is a totally different level of bodily harm compared to the speeds I see kids doing on eBikes. Would I have as a kid blasted around at 40mph if I could have? Goddamn right. That's actually my point - I'm not dead or permanently damage…

It's a real pity because not only did a kid die, he died on a piece of cycling infrastructure that is now much less safe than before because it gets used by kids moving at a speed higher than the cars will ever go in the same street.

And never mind the 45 kph scooters (that regularly do half as much) using the same bike path.

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

#504

Post by zipy124 »

hwillis wrote: post #155
boringg wrote: post #125

Ok so whats the catch with the technology? Its more powerful, smaller, all readily available materials. Some kind of strange shape, longevity challenge? Difficult to make so costs are tough to bring down? Just noticed that they are owned by mercedes benz- they will kill it accidentally. Corporate wont be able to roll it out. They will try and capture all the value and kill its potential

Axial flux motors are difficult and expensive to make. Motors need to be made of laminated steel sheets to reduce parasitic eddy currents. The laminations need to be thin in the direction of the direction of the flux. For radial flux motors you just punch out a shape and stack a bunch of sheets up. For axial flux you have to wind a strip: https://15658757.s21i.faiusr.com/2/ABUIABACGAAgmviFqAYozvPw-... Each layer of t…

Isn't the whole premise of this breakthrough that they don't need the lamination, and thus can stamp it out?

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

#506

Post by zipy124 »

molticrystal wrote: post #42

It is great that Mercedes-Benz now owns a highly performant electric engine. But is this just an impressive lab breakthrough, or can it work in the real world for their cars? Which means enduring from freezing to high temps, hours of sustained driving, and years of that (or equivalent endurance testing).

They've used their previous motors in production Ferraris and koensiggs and also in aircraft. They have the capability to make 100,000 motors a year so this is definitely not just lab stuff!

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

#507

Post by larkost »

jcims wrote: post #46
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…

Better for robotics as well.

This may or may not be generally true. The needs around motors in a robot are more about control than raw output (some output is certainly needed). It is possible that this advancement in manufacturing will benefit there, but it is not assured by the information at hand.

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

#508

Post by fukka42 »

RajT88 wrote: post #494
fukka42 wrote: post #490

Earlier quoted context omitted.

Right, so they sell guns at a super market? Walmart is a super market and like you say, they sell guns. How is this "not really"?

Calling Wal-Mart a supermarket is a giant stretch. As TFA says, some Wal-marts have groceries, and some have guns, and there is some small overlap between the two, but Wal-Mart is not what anyone would call a "Supermarket" - they are more an "Everything Store" where the "Everything" can vary by location which sometimes includes guns and groceries, but always includes TV's and frozen food and fishing supplies and clot…

I specifically said supermarkets, not grocery stores. I acknowledge they're not the same thing, but Walmart absolutely is a supermarket.

And I'll pass on visiting the US why y'all have armed police running around tackling people & disappearing them, and are demanding social media passwords only to refuse entry if you've been critical of Dear Leader. Sort your shit out, then maybe.

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

#509

Post by soperj »

Empact wrote: post #354
Aurornis wrote: post #251

Earlier quoted context omitted.

> 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. EV motors are already lightweight. The electric motor in a vehicle like a Tesla Model 3 already weighs less than you do. Reducing that one component by 75% would be a weight savings equivalent to about a half of a passenger. Not a significant effic…

This, or a miniaturized version thereof could change the game for light electric vehicles - imagine an electric motorcycle that weighs substantially more like an electric bicycle. Right now it takes about 10-15lbs of motor to produce a 3KW motor for an electric bike, this motor is about 10 times that in power density afaict. The Livewire electric motorcycles use something like 100-200 lbs of motor to produce 1/4 as m…

> This, or a miniaturized version thereof could change the game for light electric vehicles - imagine an electric motorcycle that weighs substantially more like an electric bicycle.

Sounds terrible for every other user of paths currently.

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

#510

Post by fragmede »

duskwuff wrote: post #324
mrguyorama wrote: post #318

Earlier quoted context omitted.

Putting the motors in the wheel is bad for a separate reason: Unsprung weight. Every ounce you have in the hubs that don't float on the suspension reduces certain suspension attributes. You end up with a crappier ride and poor performance.

If the motors are light enough, though, that might be acceptable... especially if they can make an even smaller version for that application. (You probably don't need 750 kW on each wheel - even for a supercar that'd be excessive.)

fwiw four of those electric motors is approximately 4,000 hp. You won't get better 0-60 times with that though, at that point, you're limited by the tires' physical limitations. So at best you could get down to a ~2.2 second 0-60 mph time with regular tires, and then after that, you'd need race sticky tires in order to go faster.

Unless you used the motors to power fans instead, then you could use that for downforce and propulsion, and get well belown 2 seconds, theoretically.

F1 cars with fans to run them upsidedown but with remote drivers for their safety maybe?

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