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

(yasa.com)
58 points breve | 1 comments | 22 Oct 25 20:54 UTC | HN request time: 0s | source
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Animats ◴[22 Oct 25 23:20 UTC] No.45676393[source]▶
"short-term peak rating"

Short-term peak ratings for electric motors are always huge. You can put in higher voltages up to arc-over. More interesting is sustained output. 1 minute, 10 minutes, 1 hour, continuous duty. That's all about how well it can get rid of heat.

That's why electric motors have a "temperature rise" number on the data plate. That's the steady-state temperature increase from a cold start when run continuously at rated power.

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pinkmuffinere ◴[22 Oct 25 23:26 UTC] No.45676448[source]▶
To be fair, in some applications the short-term peak rating is an important metric in its own right. For example, robotics applications frequently will have high peak load, but much lower steady state load. Eg, a jumping robot will briefly need a ton of force when pushing against the ground and when landing, but in the middle there it won't be applying such high loads. Likewise for bringing appendages up to speed, or accelerating a car to some speed, etc.

edit: After looking at your account, I see you are John Nagle, and I worry that I am confidently-incorrect here, lol. I'll leave the comment as-is because it is still my genuine belief, but feel free to correct me if I'm totally off!

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1. knob ◴[23 Oct 25 01:14 UTC] No.45677112[source]▶
I always remember the cool falling bodies animation Animats had in /.