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YASA beats own power density record pushing electric motor to 59kW/kg benchmark

(yasa.com)
66 points breve | 2 comments | 22 Oct 25 20:54 UTC | HN request time: 0.407s | source
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pinkmuffinere ◴[22 Oct 25 23:15 UTC] No.45676350[source]▶
> The motor’s performance on the dyno has exceeded even our most optimistic simulations

Not to take away from the exciting achievement, but I always found comments like this kindof unusual. Really, it exceeded even your _most optimistic_ simulations? If the high end of your simulated performance was below what you actually measured, I am worried that your simulation is seriously neglecting something. I used to work in decent depth with three phase bldc motors, so I feel I can say with some authority that these things _can_ be simulated, and while real world data is hard to exactly predict, getting something outside of the predicted range would generally be interpreted as a sign that your simulation isn't so good. But maybe this is just marketing-speak, and their simulations are actually totally fine.

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jacquesm ◴[23 Oct 25 00:09 UTC] No.45676723[source]▶
> and while real world data is hard to exactly predict, getting something outside of the predicted range would generally be interpreted as a sign that your simulation isn't so good

Either that, or your measurements are inaccurate.

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1. metalman ◴[23 Oct 25 07:53 UTC] No.45679357[source]▶
or, yasa is moving very quickly,and as they are breaking new ground in power density, the numbers are ridonkulous,completly and utterly insane, 30lb's peak over 1000hp,just having the thing not vaporise itself is an achivement, and so there is no actual way to simulate that, outside of rocket motors, which is kind of where they are at. bet the tire guys are shaking there heads
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2. jacquesm ◴[23 Oct 25 08:55 UTC] No.45679728[source]▶
Extraordinary claims and all that. Of course you can simulate it. If you are this surprised by the outcome of an experimental setup the first thing you should do is distrust the data. Figure out where the discrepancy is. Fix it, re-run the simulation and the experiment until the two are in agreement. Then publish.

The normal scientific reflex is not to hit the marketing guy and say 'we've got a winner, go write it up'.