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A comment on No Magnets, Big Power: BMW’s Fifth-Generation Electric Motor (2022).

Re:No Magnets, Big Power: BMW’s Fifth-Generation Electric Mo... by WirelessGigabit on Friday March 03, 2023 @02:44PM (#35014102)
Replacing the brushes as they wear out: fine.

But what about the dust accumulating inside and sticking everywhere, adding additional wear.

I guess we'll see how many iXs are still on the road in 5 years.

[ Parent | on HN ]
Re:No Magnets, Big Power: BMW’s Fifth-Generation Electric Mo... by darksaints on Friday March 03, 2023 @04:15PM (#35015094)
It uses slip rings like your alternator, not a commutator like a typical brushed DC motor. I’ve had alternators that have lasted more than 20 years, and they don’t have dust problems. There’s no arcing and there is a continuous contact surface, so there isn’t really any dust.
[ Parent | on HN ]