1. The positive power line of the Hall sensor inside the motor, i.e. the red line, is generally connected to 5-12V DC, mostly 5V. The Hall signal line transmits the position of the magnet relative to the coil in the brushless motor. According to the three Hall signals, the controller can know how to power the motor coil at this time, that is, the Hall state is different and the current direction of the coil is different.
2. The Hall signal is transmitted to the controller, and the controller powers the motor coil through the motor phase line. The brushless motor phase line is a thick line, not a Hall line. When the motor rotates, the magnet and the coil rotate, and the Hall senses a new position signal. The controller thick line changes the current direction of the motor coil again, and the motor continues to rotate. This is electronic commutation. To be precise, it is a coil wrapped around the stator, and the Hall is generally installed on the stator.