Comment on 28-pound electric motor delivers 1000 horsepower

Sam_Bass@lemmy.world ⁨4⁩ ⁨months⁩ ago

• kalkulat@lemmy.world ⁨4⁩ ⁨months⁩ ago

  Electrics produce maximum torque at 0 rpm …

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• Zink@programming.dev ⁨4⁩ ⁨months⁩ ago

  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.

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  • Sam_Bass@lemmy.world ⁨4⁩ ⁨months⁩ ago

    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

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    • Zink@programming.dev ⁨4⁩ ⁨months⁩ 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.

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