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I'm not so sure about this; part of my father's business involves rebuilding electric motors and I was surprised by the rebuild intervals of some of them.

I'm sure they will be engineered to a certain life expectancy, but I'm interested to see how long they will end up lasting in modern automotive applications.

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What kind of electric motors? Brushed DC by chance?

I don't know much about electric motors, but I think these are typically 230 or 460V AC, three-phase motors in the 10-30hp range.

They operate in extreme conditions though, so that's certainly a factor.

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