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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

#361

Post by bhhaskin »

mperham wrote: post #356
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…

There’s no area in the world that allows e-bikes with more than 750w motors. A 3kw motor is illegal (cf Surron), unless you are talking about an e-moped requiring registration.

There is a big issue in the US currently with people buying electric motorcycles that look like e-bikes.

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

#362

Post by gameman144 »

ajuc wrote: post #307
gambiting wrote: post #303

Earlier quoted context omitted.

That will just make the gigantic SUVs with 7 or more seats dominate even more.

car weight / min(number of seats, number of people in the family)

This metric disincentivizes carpooling -- everyone should drive a light single-seater to minimize their tax.

(I agree with the spirit, just calling out that there are going to be edge cases galore with a scenario like this)

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

#363

Post by eikenberry »

bhhaskin wrote: post #361
mperham wrote: post #356

Earlier quoted context omitted.

There’s no area in the world that allows e-bikes with more than 750w motors. A 3kw motor is illegal (cf Surron), unless you are talking about an e-moped requiring registration.

There is a big issue in the US currently with people buying electric motorcycles that look like e-bikes.

What is the issue? I've seen people on those bikes and they look fun to ride.

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

#364

Post by avn2109 »

ErroneousBosh wrote: post #298
ehnto wrote: post #224

Earlier quoted context omitted.

I wonder if that would be legal, or if there is a regulation about where you can put your brakes?

There are cars with inboard brakes, although not recently. From a packaging point of view putting them out at the wheel makes sense, since there's a lot of space you're not using otherwise. It's hard to fit inboard brakes to front wheel drive cars because there's so little space but Citroën managed it with the 2CV and various derivatives, and the GS/GSA/Birotor family. They had an inline engine with a very compact ge…

Super pro comment, should be much higher.

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

#365

Post by [deleted] »

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…

[deleted]

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

#366

Post by robotresearcher »

hvb2 wrote: post #262
robotresearcher wrote: post #248

Earlier quoted context omitted.

The new motor is also much more than double the power output of the Model Y motor, so the second motor and its wiring could be eliminated completely.

No, because that second motor gives you AWD. Sure that's a feature you could go without... But torque and power were never the limiting factor for an EV. You would only benefit on a track, and if you're taking a model Y there...

That's a great point I neglected, thanks. I bought a M3 with dual motor option mainly for the AWD.

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

#367

Post by hinkley »

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…

Hub motors are problematic because they increase the sprung weight of the wheel, which loses more traction when hitting bumps. Dangerous while cornering or braking. Scale down a motor like this to 300 HP and you could have an amazing AWD vehicle.

This video https://m.youtube.com/watch?v=WU9Ptibu2WQ&t=179s claims that SMC materials have much higher losses at low frequencies than laminated materials, up to around 400 HZ when they very rapidly pull ahead.

So as the core of a step down transformer for consumer electronics, SMCs would be worse than a laminated core (stack of sheet metal pieces punched with a press, stacked and wound with the windings). But in a motor operating at 100s of rpms, no problem. And as I understand it, in high torque motors the magnetic fields pulse far more often than once per revolution because the windings are many and small, so that several can pull on the armature at any orientation.

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

#368

Post by robotresearcher »

robotresearcher wrote: post #241
cesaref wrote: post #201

Earlier quoted context omitted.

I don't see the weight reduction being very significant. If we take a Tesla model 3, I believe it weighs 1611kg, and the motor shows up at 80kg if you google it (no idea if this is correct). This YASA motor by comparison weighs 14kg. So, this would drop the vehicle weight by 66kg out of 1611, so that's a 4% saving.

This motor is well more than twice as powerful as the Model 3 motor, so it could eliminate the entire weight of the second motor in the higher performance models. That’s 146kg, the weight of two adults, an 11% reduction.

As pointed out elsewhere, this neglects AWD which is an important part of the dual motor models' value proposition.

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

#369

Post by kazinator »

pbmonster wrote: post #314
kazinator wrote: post #290

> It can also sustain between 350 and 400 kilowatts (469–536 horsepower) continuously, meaning it’s not just built for short bursts, as it can deliver massive power all day long. On what battery?

Pretty much any modern car battery out there. Many of those allow 350 kW charging , discharging that quickly is even easier.

kW measures output power, not capacity. What battery can output that power 'all day' as they claim?

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

#370

Post by hinkley »

Aurornis wrote: post #281
catapart wrote: post #269

Earlier quoted context omitted.

I'm not reading anyone's marketing material. If you want to dispute the shipping weight, feel free to correct this website whom I assume charges for shipping based on weight [0]. I'm sure they'd love to know they have it wrong. According to purchasable equipment, the Model 3 engines weight ~175 lbs. If that's wrong, that's on them for claiming it. Subtract 28 lbs from that and you're at 147 lbs. That is very close to…

That’s a drive unit , which is more than the motor. Read the description: > This kit includes the Tesla motor, inverter, gear box, power cables and drive shafts. Drive shafts, gearbox, power cables, inverter. Also includes the mounts, which is likely not factored into the lab calculations for this marketing material. You cannot drop 150lbs from the Model 3 motor because it doesn’t even weigh 150lbs.

Smaller motor can be one per wheel which means a shorter drive shaft, less rotating weight which means more torque to the road under acceleration and deceleration.

Tesla still doing a gearbox? Their marketing has been telling me they got rid of those. Typical.

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