Introduction of brushless motor.
The brushless DC motor, which consists of a motor body and a driver, is a typical mechatronics engineering product. Since the DC motor operates autonomously, there is no additional winding on the rotor, as is the case with heavy duty motors starting at variable frequency drives, and no oscillation or out of step when the load changes abruptly. Small and medium capacity DC motor magnets are now made of high energy rare earth ND FE B nd Fe b materials. Therefore, the volume of the rare earth permanent magnet brushless motor is smaller than that of the three-phase asynchronous motor with the same capacity.
Structurally, brushless motor and brush motor have similarities, but also have rotor and stator, brush motor structure is the opposite; Brush Motor Rotor is coil winding, and power output shaft connected, the stator is permanent magnet; The rotor of the Brushless motor is permanent magnet steel, which is connected with the output shaft together with the casing, and the stator is a winding coil. The commutator brush which is used by the brush motor to change the electromagnetic field alternately is removed, so it is called the Brushless motor. Then there is a problem now, without the electromagnetic field transformation, how to make brushless motor rotation?
