Dc fan is analysed and its working principle

Dc fan, just as its name implies is by dc voltage and electromagnetic induction, the electrical energy is converted into electromagnetic energy, electromagnetic energy is converted into mechanical energy, and finally transformed into kinetic energy, so that the cooling fan blade rotation.


conventional dc fan is mainly composed of rotor, stator, motor, the casing outside the four parts. Dc motor: the permanent magnets, multi-level winding of the stator and rotor position sensors, electronic commutation drive control circuit. Rotor: a motor shell + permanent magnetic stripe + axis core + blades. Stator parts: enameled wire + plastic coated silicon steel sheet + + bearing hall sensor detection + driver circuit board + axis.


is the core component of the dc fan stator and rotor. By ampere right-hand rule we know that, the electric current through a conductor produces magnetic field around, if put the conductor at a fixed magnetic field, it will generate attraction or repulsion, resulting in the moving objects. Inside the dc fan blades, attached to a charge in advance of the magnetic rubber magnet. Around the silicon steel sheet, the axis part two sets of coil winding, and use hall sensor component as a group synchronous detection device control circuit, the circuit make the job of two groups of coil turns of coil axis, make the silicon steel sheet to produce different magnetic pole, the pole and rubber magnet repulsion. When the repulsion is greater than the lice fan of static friction force, natural rotating blades. Because the hall sensor component provides synchronization signals, blades sustained operation, therefore, as for the direction of running, can be determined by Fleming right-hand rule. This is the working principle of the dc fan.