The brushless motor controller is a key component for controlling the operation of the motor. Once a fault occurs, it may cause the entire motor system to malfunction. Before repairing the motor controller, it is necessary to first determine the cause of the malfunction.
Firstly, check for any obvious damage or burn marks on the brushless motor controller, which may be caused by overload or short circuit. Secondly, check whether the connection circuit is loose or has poor contact, which may cause obstruction of current transmission. If the above problems are not found, it may be due to damage to the internal components of the motor controller.
Next, the following steps can be taken for maintenance. Firstly, disconnect the brushless motor controller from the power supply and remove the controller casing, carefully inspecting the components on the circuit board. If burnt or swollen components are found, they can be replaced.

In addition, a multimeter can be used to test the resistors, capacitors, and other components on the circuit board to ensure their proper functioning. If the specific damaged component is identified, you can choose to purchase replacement parts of the same model for replacement. When replacing components, it is important to pay attention to proper welding and installation to ensure a secure and reliable connection.
After completing the repair, reassemble the motor controller and connect it to the power supply for functional testing. If everything is normal, congratulations on successfully repairing the brushless motor controller. However, if you are unsure how to repair it, it is recommended to seek professional motor maintenance personnel for repairs to avoid further damage to the motor controller or the occurrence of dangerous accidents.