this post was submitted on 03 Nov 2025
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[–] Sam_Bass@lemmy.world 4 points 1 day ago (2 children)

How much torque though? HP is nice but power is in the torque as much if not more than the voltage(HP)

[–] kalkulat@lemmy.world 1 points 7 hours ago

Electrics produce maximum torque at 0 rpm ...

[–] Zink@programming.dev 3 points 1 day ago (1 children)

The voltage/hp comparison there doesn't really fit.

Power is in watts or horsepower. You multiply the torque with the RPM and a scaling factor to get power.

A higher voltage system could probably be expected to produce more torque and power from the same size motor, but a lot depends on the design of the motor.

Then to answer "how much torque though," I haven't looked into it but electric motors have a very nice torque curve across the RPM range. If a motor made all that power with low torque, then it must spin at super high RPM and need to be geared down.

[–] Sam_Bass@lemmy.world 1 points 1 day ago (1 children)

That motor doesn't look like it has enough mass to properly make enough torque to drive the weight of a car even if said car it made entirely of carbon fiber

[–] Zink@programming.dev 2 points 1 day ago

Totally, and I think that's why they thought it was worth a press release. In the article they go right to how they're setting a new power density record with this design.

Electric motors are just really power dense. The article says they managed a short term peak of 1,000 hp with that little flat 12.7kg motor and the continuous output could still be half that.

Just the cooling must be crazy.

Out of curiosity I looked up something comparable. It looks like high-performance integrated drive units that have other stuff like the single-speed gearbox, differential, and inverter are still only in the dozens of kg.