Causes and Solutions for Electric Bike Motor Not Rotating

1. Bearing Issue —— Shake the motor left and right by hand. If there is a large gap, the bearing is damaged —— Replace the bearing.

   
   

2. Brake Issue —— For Electric Bike with drum brakes or expanding brakes: fully loosen the brake cable and rotate the tire. If the tire can rotate, the brake is damaged; for electric vehicles with disc brakes: remove the brake caliper without disconnecting the oil pipe, then rotate the tire. If the tire can rotate, the brake is damaged —— Replace the brake system.

   
   

3. Controller or Motor Issue —— Disconnect the three phase wires of the controller and try to rotate the motor. If the motor can rotate normally, the controller is damaged; if it cannot rotate normally, the motor is damaged —— Replace the controller or the motor.

If the wiring of the controller is normal, the controller itself is faulty, and the controller should be replaced.

Motor damage is divided into two types: damage to the Hall sensor inside the motor and short circuit of the coil. In the case of the former, the Hall sensor needs to be replaced. Replacing the Hall sensor alone is very troublesome, so you can choose to replace the entire Hall sensor; if there is a short circuit in the coil inside the motor (which can be judged by connecting the phase wires in pairs), the motor needs to be replaced.