Brushless motor is established by the controller at the appropriate time for motor phase coil electricity, to produce a rotating magnetic field, the motor rotor rotate with the rotating magnetic field. When the hall element in the N pole and s pole is different when the potential, the center hall element from a N pole through a magnetic boundary of magnetic steel enters another s pole, just at the moment through a magnetic boundary, hall element instead of potential output, with the potential to control circuit of the controller, the brushless motor flux of coil current direction change, so as to achieve the purpose of motor electronic commutation, when reversing the center line of the hall element and coil reversing the position of the center line of the edge should be a coincidence.
