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Originally Posted by saltywetman
is there a point though since electric motors don't use gears?
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Electric motors have an RPM range where they are most efficient, though it is pretty broad. The powertrain we use at work is just a DC Sepex motor, our competitors have gone AC and tout the higher efficiency. The thing is, the RPM range we all run our motors is pretty much right at over the cross over point. If we were both running 3-400 RPM more they would have a claim. As of now, there claim doesn't justify the additional cost and cooling they have to run. So depending on what motor technology is being used and target use, there could be a reason to do it. Formula E runs multi speed gearboxes, but they usually only use 1st for the start and leave it in 2nd the rest of the time.