my1020

Murph

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Dec 10, 2021
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Hello. Building my 1st ebike. My question is I have a motor 48 volt 1000 watt (my 1020 its called) It came with a YK31C speed controller. Im hoping to achieve 35 mph. will the speed controller restrict the speed I get?
 

spinnanz

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Dec 10, 2021
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You will need far higher voltage to get 35mph. My 48v 800w bike that runs VERY narrow road race tires will only get about 25mph.
 

Hoggdoc

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Hello. Building my 1st ebike. My question is I have a motor 48 volt 1000 watt (my 1020 its called) It came with a YK31C speed controller. Im hoping to achieve 35 mph. will the speed controller restrict the speed I get?
Yes the controller could limit the amount of amps delivered to the motor which would control the torque the motor produces. But all brushless motors are limited by the KV of their windings. KV stands for kilovolts which translates to how many RPM the motor will turn for volt power applied.

For your motor to develop 1000 W of power with a 48 V battery the controller would need to allow at least 21 A to be provided to the motor. Most controllers have a speed sensor input and the controller could limit the speed the bike and run. You really need to know how flexible the controller and display are at providing you with a means to adjust the settings. The settings you look for our maximum speed and current.
 
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