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28-pound electric motor delivers 1000 horsepower (supercarblondie.com)
submitted 10 months ago by to c/technology@lemmy.world
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Maker website: https://yasa.com/news/yasa-smashes-own-unofficial-power-density-world-record-pushing-state-of-the-art-electric-motor-to-staggering-new-59kw-kg-benchmark/

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[–] 13 points 10 months ago (1 child)

This motor weighs 12.7 kilograms and has 1000hp. How much does a comparable motor weigh?

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  • [–] -3 points 10 months ago* (last edited 10 months ago) (3 children)

    There is a 1000 hp tesla with 3 motors that all together weights about 450 killograms, this seems to support your idea until you look at how much the batteries weigh...

    The batteries are 550 kilograms to start, and are generally considered to not be big enough. So yeah, great they solved the issue that no EV had (EVs always had lighter motors, and very heavy batteries).

    Edit: The 1000 hp telsa is 2200 Kg total, so yeah this would cut out 400 ish Kgs (assuming cooling and inverter and all that) from the total, not nothing but not really a game changer ether. Also 1000 Hp engine is stupid and not needed, maybe if it was a 200 Hp version but then also that would be diminishing returns as this motor would be what 4 kgs?

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  • [–] 28 points 10 months ago (1 child)

    ~20% weight reduction for a total vehicle weight isn't small change. Plus batteries will continue to improve as well. Do you just get off on being negative?

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  • [–] 14 points 10 months ago (2 children)

    Yeah, I'm not sure how they concluded in their edit that 400kg is not a lot to shed.

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  • [–] 8 points 10 months ago (1 child)

    The gains compound a bit too, 20 percent less weight equals proportionally less battery capacity required to shift the now-lighter vehicle from point A to point B.

    So then you can cut the size of the battery while maintaining the same range, and that's where you start to get significant overall weight and cost savings.

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  • [–] 5 points 10 months ago (1 child)

    Put the big battery pack (and maybe an ICE powered generator + fuel) on a trailer for cruising, then have a "ditch trailer and escape" button for that 20 mile sprint at the end of the trip.

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  • [–] 15 points 10 months ago (2 children)

    Ah, yes. I too enjoy staging my road tripping vehicle like an interplanetary rocket.

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  • [–] 3 points 10 months ago (1 child)

    Bonus: you can always circle back and pick up the recharge pack, and if you put solar cells on top it can trickle in a (tiny) extra charge when you're away. More practical: plug it into the grid for slow charging of your big batteries while you zip around town in your lightweight configuration.

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  • [–] 1 point 10 months ago (1 child)

    Imagine if you called the trailer your 'house' and left it in the one place all the time!

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  • [–] 0 points 10 months ago

    A really small house can hold 50 gallons of diesel and a generator, be towed to a filling station, and follow you thousands of miles...

    If you want a 200 mile round-trip limited EV that you always charge at home, you can buy those today from all kinds of sellers.

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  • [–] 4 points 10 months ago

    Making the motor lighter gives weight allowance for the onboard BESS. This could allow more batteries to be installed on the same car, increasing range and power/torque, so long as the volume of the car allows that same BESS increase.

    It's still good progress. I don't understand your POV where we must focus on the BESS first and make that more efficient, both in terms of weight, volume, power, and energy, then move on to other things.

    We can do that in parallel and see faster improvements.

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