How DC Ceiling Fans Work

① Conventional DC fans are mainly composed of four parts: rotor, stator, motor, and outer frame.

Composition of DC motor: It consists of a permanent magnet rotor, a multi-level winding stator, a position sensor, and an electronic commutation drive control circuit.

The rotor is composed of: motor shell + permanent magnetic strip + shaft core + fan blade.

Stator part: enameled wire + plastic-coated silicon steel sheet + bearing + Hall sensor detection + drive circuit board + shaft.

The core components of a DC fan are the stator and the rotor.

②According to Ampere's right-hand rule, we know that when a conductor passes current, a magnetic field will be generated around it. If the conductor is placed in another fixed magnetic field, it will generate attraction or repulsion, which will cause the object to move. The magnetic rubber magnet surrounds the silicon steel sheet, and two sets of coils are wound around the axis, and a Hall induction component is used as a synchronous detection device to control a set of circuits, which makes the two sets of coils around the axis work in turn, so that The silicon steel sheets produce different magnetic poles, and the magnetic poles and the rubber magnets generate a repulsive force. When the repulsive force is greater than the static friction of the louse fan, the fan blades rotate naturally.

Since the Hall sensor component provides a synchronous signal, the fan blade can continue to run. As for its running direction, it can be determined according to Fleming's right-hand rule. This is how DC fans work.