It says your power requirement is 1.1kW
This motor seems to fit the bill (would require 48v DC power supply and Electronic speed controller:
https://flipsky.net/collections/e-skateboard/products/flipsky-bldc-belt-motor-battle-hardened-6384-190kv-4000w-for-electric-skateboard
Motor $119USD...
One more point about choosing the right KV BLDC motor (if you go that route). You want a high enough KV that the motor will get to the rpm you need (based on the DC supply voltage)… but why not go too high? The reason you don’t want the KV too high is because higher KV means less torque per...
A word of caution about top motor speed, some modern BLDC speed controllers use a different more modern control algorithm called “FOC” short for field oriented control that makes the motor run more quietly and efficiently by outputting a sinusoidal waveform, but beware this might reduce the peak...
If the motor has magnets and a DC power supply (BLDC motor) you would look at the motor’s Kv constant (max unloaded rpm per volt) If your DC power supply is 100v, then a 65-70Kv motor should work. If the DC supply is 48v, then you’d need a 6500rpm / 48v = 135kv or higher motor.
The Kv of the...
So if the final output rpm is 45.5rpm, and you have a 137:1 gear reduction between the motor and final output, then the motor spins 45.5 * 137 = 6233rpm
A final consideration might be whether or not you can alter the gear ratio to get the motor’s operating speed close to the speed that it’s most efficient. The motor puts out the same resistive loss as it turns faster & faster at the same torque giving higher output power for the same resistive...
Once you verify the motor is big enough for efficiency and to not overheat, and that it can turn fast enough considering your max input voltage, then its a matter of how many amps you put through the motor to get the torque you need.