737 HP out of a 29 pound motor

[begreen]

A new electric motor under development just set a new record for power density. Right now it will only be showing up in the highest end cars and sports cars, but may be a harbinger for future EV tech. Scaled down to normal auto production, it can mean lighter cars which in turn could mean smaller EV batteries.

"YASA’s prototype motor produces just over 737 horsepower and weighs only 28.9 pounds. That’s more power than a standard Hellcat engine, in a piece of equipment you can pick up and hold in your hands."

https://www.roadandtrack.com/news/a65465886/mercedes-benz-yasa-737-hp-electric-motor-weighs-29-pounds/

 

[woodgeek]

Google seems to think the motor in my Bolt weight 167 lbs, but that the stator/rotor only weighs 60 lbs.

So 1/3rd the horsepower in 2X the weight, for 2016 state of the art Chevy tech. That said, for everyday vehicles I don't see a lot of weight reduction potential here (in a 3500 lb EV).

 

[Whitenuckler]

A new electric motor under development just set a new record for power density. Right now it will only be showing up in the highest end cars and sports cars, but may be a harbinger for future EV tech. Scaled down to normal auto production, it can mean lighter cars which in turn could mean smaller EV batteries.

"YASA’s prototype motor produces just over 737 horsepower and weighs only 28.9 pounds. That’s more power than a standard Hellcat engine, in a piece of equipment you can pick up and hold in your hands."

https://www.roadandtrack.com/news/a65465886/mercedes-benz-yasa-737-hp-electric-motor-weighs-29-pounds/

I wonder what kind of torque will be driving the wheels. I also wonder what kind of rpm they are spinning these motors.
737HP would be nice if it had 737 lbft of torque at the wheels

 

[begreen]

I wonder what kind of torque will be driving the wheels. I also wonder what kind of rpm they are spinning these motors.
737HP would be nice if it had 737 lbft of torque at the wheels

Not sure but given the market, I suspect it's excellent and higher than the hp. This is one of their older, 2021 production motors:

Yasa 750R Motor Package | Stealth EV

Technical Details: Peak Torque @ 450 ARMS: 790 Nm Peak Power @ 700 VDC: 200 kW Peak Power @ 400 VDC: 100 kW Continuous Torque (40 ̊C coolant): 400 Nm Continuous Power @ 3000 rpm (40 ̊C coolant): Up to 70 kW Speed: 0 – 3250 rpm Peak Efficiency: >95% Mass: 37 kg Dimensions: 368mm [...]

stealthev.com

 

[Whitenuckler]

Not sure but given the market, I suspect it's excellent and higher than the hp. This is one of their older, 2021 production motors:

Yasa 750R Motor Package | Stealth EV

Technical Details: Peak Torque @ 450 ARMS: 790 Nm Peak Power @ 700 VDC: 200 kW Peak Power @ 400 VDC: 100 kW Continuous Torque (40 ̊C coolant): 400 Nm Continuous Power @ 3000 rpm (40 ̊C coolant): Up to 70 kW Speed: 0 – 3250 rpm Peak Efficiency: >95% Mass: 37 kg Dimensions: 368mm [...]

stealthev.com

582 ftlb peak. Nice. RPM seems good too at 3000. Not low for an electrical motor, which used to be under 1800 RPM.


?

 

[DBoon]

You really have to be careful about what horsepower number they are referencing - is it peak HP or continuous horsepower at reasonable and usable RPMs? The 737 HP is most likely the absolute best case peak and is a nearly useless number. The existing production motor seems to generate half of that rating continuously. Still - a good number, but it is not an apples to apples comparison to other motors unless you know the continuous horsepower at comparable RPMs.

 

[begreen]

The article says "Continuous power is “close” to the peak output using only standard cooling fluids, and Woolmer said the peak itself is good for about five seconds."