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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

#441

Post by icedrift »

Aurornis wrote: post #251
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…

> 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…

For EVs no but it's huge for flight if it could be scaled down. Paramotors and ultralight planes are on the verge of being competitive with gas they just need a bit more energy density per pound in the system.

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

#442

Post by reactordev »

nomel wrote: post #402
reactordev wrote: post #57

Axial flux motors are so next level. Very little power needed per rpm. I’ve built a few tiny ones for FPV and they are a joy to work with. I’ll die a happy man if I never have to coil again.

Coils are still required for axial flux motors, they're just in a different orientation [1]. [1] https://www.youtube.com/watch?v=dCO633KE7RA&t=510s

Negative, mine do not. I use an air core stator where my “coils” are etched into the PCB. I don’t have to wind anything.

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

#443

Post by RajT88 »

conductr wrote: post #434
RajT88 wrote: post #406

Earlier quoted context omitted.

Not really... https://www.reddit.com/r/AskAmericans/comments/184oag8/can_y... That assertion seems to be a disconnect of language. But - Selling firearms in Wal-Mart is bad enough, but it does tend to be more rural Wal-Marts than suburban (and not at all urban). Said firearms are under lock and key in the same way they would be at gun stores. There are many gun shops in the same areas where Wal-Mart sells firearms. A…

> All bets are off for Texas. We have everything locked up too just as you describe. We just have a lot of places to buy them, it's not like Wal-Mart here has a bin in the middle of the isle full of AR's next to the bin of Pokemon stuffies. Only pellet and BB guns are found on the shelf. I don't know why I'm being pedantic, guns here are insane for many reasons but not because of this one. What bothers me is once you…

I live on the edge of the suburbs in a Blue state, at least where I live (and further on towards the city) open carry gets you the attention you're looking for from the police. People don't tend to do it.

I am not sure about further out. I know people in Michigan who keep a piece in their glovebox. I've seen in the movies what you talk about - the gun rack in the truck cabin. None of my rural relatives ever did that, not even in Michigan which is pretty gun-friendly away from cities.

> I don't know why I'm being pedantic, guns here are insane for many reasons but not because of this one.

Yeah, I mean. In Illinois at least, the guns get into the hands of the bad guys overwhelmingly because of straw buyers. Not because of "the gun show loophole". A small number of guns are obtained through theft. Mostly it's straw buyers, at least when it comes to guns used in crimes.

My family is filled with outdoorsy people (myself included), and although the numbers don't paint a picture of legal CCR owners being problematic, the wide array of people I've known who do carry makes me wonder how the hell it isn't a bigger problem. All manner of unhinged weirdos, some of whom pretty openly muse about the opportunity to shoot the kind of person they don't like. (Lots of normal people too - but plenty of weirdos)

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

#444

Post by jmb99 »

fukka42 wrote: post #397
floo wrote: post #177

Earlier quoted context omitted.

Because kg is the fundamental unit of mass and kW is typically used for electric motors. Same reason you wouldn't use m²/s³ even though that's also technically correct.

You're thinking of grams and watts. Kilo is an SI prefix.

https://en.wikipedia.org/wiki/SI_base_unit

"The kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed numerical value of the Planck constant h to be 6.62607015×10−34 when expressed in the unit J s, which is equal to kg m2 s−1, where the metre and the second are defined in terms of c and ∆νCs.[1]"

The base SI unit for power is the watt. The base SI unit for mass is the kilogram. Yes, this is dumb, but it's the way it is.

[1] https://www.bipm.org/utils/common/pdf/si-brochure/SI-Brochur...

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

#445

Post by icedrift »

bootlooped wrote: post #430
SR2Z wrote: post #385

Earlier quoted context omitted.

They are not allowed, but still commonly owned and used. The law needs to catch up. There are clearly good reasons for people to want extremely powerful e-bikes and they should be allowed to. They can't be treated like bicycles because they're too fast but aren't nearly as dangerous as motorcycles. We need a new category for light motorcycles. The real problem, IMO, is that the law is generally not deferential enough…

> The law needs to catch up. There are clearly good reasons for people to want extremely powerful e-bikes and they should be allowed to. I'm not so sure about that. I don't want a 6000kw Sur Ron riding in the bike lane with me. The whole point of the bike lane was to make a safe space for riding a bicycle. I want the bike lanes to be safe enough for children to ride their bikes in, and having something that powerful…

I think what they mean is these e-bikes pushing 60mph should be legal but reclassified as something closer to a motorcycle. The problem with keeping them illegal is people tend to treat them like bikes when they should be on the road.

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

#446

Post by mkoubaa »

reactordev wrote: post #442
nomel wrote: post #402

Earlier quoted context omitted.

Coils are still required for axial flux motors, they're just in a different orientation [1]. [1] https://www.youtube.com/watch?v=dCO633KE7RA&t=510s

Negative, mine do not. I use an air core stator where my “coils” are etched into the PCB. I don’t have to wind anything.

Infinitum?

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

#447

Post by pfdietz »

gwbas1c wrote: post #210

It's easy to forget that most of the weight in an electric car is the battery . It's ICE cars where a lot of the weight is in the motor. That being said, could this be adapted so that a 2.8lb motor produces 100 hp? That would allow putting a small motor in each wheel, thus completely eliminating axels, driveshafts, and allow recapturing the space they used to occupy. It also wouldn't significantly impact unsprung wei…

So, this could be better in hybrid cars?

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

#448

Post by adgjlsfhk1 »

ErroneousBosh wrote: post #156
hylaride wrote: post #145

Earlier quoted context omitted.

I think they misspoke when they said "in" the wheel, but supercars can have a separate motor for each wheel, and the closer they are to the wheel the better the torque as it's not also driving a longer shaft. The smaller the motor, the closer you can get.

I guess if you can make the motor and a suitable reduction box lighter than the equivalent bearing and driveshaft combination you could make the suspension arms mechanically simpler. By using motors at each wheel you'd eliminate the need for a differential, saving a good 40-50kg or so. Of course, if you kept the drive shafts and put the motor and reduction box in the middle, you'd be able to use inboard brakes and sa…

it would be really interesting if it became possible to do electronic only breaks. I'm sure the regulatory system isn't there yet, but it would let you shave a whole bunch more parts and complexity

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

#449

Post by neuralRiot »

drnick1 wrote: post #419
fukka42 wrote: post #393

Earlier quoted context omitted.

[flagged]

So what? Not everyone wants to live in a communist hellscape where everything is regulated to death.

Yeah! We want V8s and powder, we want diesel fumes and school shootings in our land of the freee just as God intended it to be.

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

#450

Post by ashirviskas »

oblio wrote: post #439
SR2Z wrote: post #385

Earlier quoted context omitted.

They are not allowed, but still commonly owned and used. The law needs to catch up. There are clearly good reasons for people to want extremely powerful e-bikes and they should be allowed to. They can't be treated like bicycles because they're too fast but aren't nearly as dangerous as motorcycles. We need a new category for light motorcycles. The real problem, IMO, is that the law is generally not deferential enough…

Any ebike that goes faster than 25kmph in Europe and whatever it is in NA should not be allowed anywhere were pedestrians can go. The real solution people don't want to accept is that ALL non arterial roads in ANY urban/suburban/rural environment should be limited to 30kpmh (and equivalent in NA). And by limited I mean traffic calmed: 1 lane per direction, narrow lanes, raised street crossing, raised intersections, E…

> Any bike that goes faster than 25kmph in Europe and whatever it is in NA should not be allowed anywhere were pedestrians can go.

So, literally any bicycle?

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