First of all, the characteristics of automobile headlight light modulation motor is used to achieve the semiconductor switching device to the electronic commutation, namely electronic switch device instead of traditional contact commutator and brush. The high reliability, no change of the electric spark, low mechanical noise and so on.

Secondly, the electric motor of the electric motor of the electric motor of the electric motor with the magnetic sensor is arranged on the stator, and the photoelectric sensor is arranged on the stator component.

Finally, the stator winding of the operating voltage is provided by the position sensor output control of the electronic switching circuit. When the rotor is rotated, the photosensitive components on the stator will be on a certain frequency intermittent pulse signal. Used to detect the magnetic field generated by the permanent magnet and the rotor rotation.