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Old 09-12-2023, 02:35 AM   #22 (permalink)
Simon TT
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Join Date: Dec 2022
Location: Bavaria
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BMW - '09 BMW E91 325d
90 day: 50.38 mpg (US)

SRCE - '04 Smart Roadster Coupe 60KW
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Quote:
Originally Posted by JSH View Post
Something to consider when choosing between hub motors and frame mounted motors is the very large difference in axle torque.

With a hub motor the rated torque is also the axle torque. With a frame mounted motor the motor torque is multiplied by the gear reduction ratio which is generally 3 to 5 times.

A 100 Nm hub motor puts 100 Nm to the rear axle. A 100 Nm mid-drive motor puts 300 to 500 Nm to the rear axle.

That is why bicycles and motorcycles with hub motors are generally much slower to accelerate than a vehicle with the same size frame mounted motor.
Sure, but since my ICE only has 110Nm and I don't want a full hybrid pretty much any motor should have enough torque
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