In the field of model, the brush motor is a very important part, but because the brush motor is used for some time, it needs to open the motor to clean the brush of the motor. It is time-consuming and difficult to heat, which leads to the short life of the brush motor. So, the brushless motor is born, so what is the brushless motor? The following is introduced by the technical staff of Bo Ying.

The brushless motor is a motor without the brush device, which uses semiconductor switch device to realize the electronic commutation. That is, the electronic switch device is used instead of the traditional contact commutator and brush. So the brushless motor has the advantages of high reliability, no commutation spark and low mechanical noise.

Brushless motor is composed of permanent magnet rotor, multipole winding stator, position sensor and so on. According to the change of the rotor position, the position sensor changes the stator winding current in a certain order (i.e. detecting the position of the rotor magnetic pole relative to the stator winding, and producing the position sensing signal at the determined position. After the signal conversion circuit is processed, the power switch circuit is controlled, and the winding electricity is carried out according to a certain logical relationship. " Flow switching). The operating voltage of the stator winding is provided by an electronic switching circuit controlled by the output of the position sensor.

The above is the definition of the brushless motor. Because the brushless motor is operated by self control, it will not add the starting winding to the rotor like the synchronous motor that is reloaded on the variable frequency speed control, and will not produce oscillations and lost steps when the load is abrupt, so it is widely used in high gear recorders, video recorders, electronic instruments and so on. Automatic office equipment.