OK, if motor voltage is increased, the amount of current used will go down with the same wattage output.
24 volt 400 watt motor= 16.7 amp draw.
36 volt 400 watt motor= 11.1 amp draw.
This only applies if you are still doing the same amount of work with the motor. Now on a bicycle that has a 24 volt 400 watt motor and you increase the voltage to 36, the added voltage will make the motor want to push the bicycle faster which equates to a higher wattage, what happens to the current, how high will it go? Would the motor want to draw the same amount of amps as it did at 24 volts?
24 volt 16.7 amp motor= 400 watts.
36 volt 16.7 amp motor= 600 watts.
Is this right?