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Old 06-05-2017, 01:37 PM   #9 (permalink)
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Originally Posted by rmay635703 View Post
Hmm gear reduction via planetary?

Anyway RPMs are a hub motor issue but only at startup since you don't have enough torque to start the car rolling

Never heard of top speed as being an issue with hub motors,
I think it is because they want to reduce the weight of the motor units, that requires the reduction gear. They avoid mentioning the reason that weight is the issue - unsprung weight is the main challenge of hub motors.

The obvious answer is to use tandem motors with half shafts. Then you don't have gear losses, and you have much lower unsprung weight, too.
Sincerely, Neil
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