What is a brushless motor?
Because the brushless motor runs in a self-controlled manner, it will not add a starting winding to the rotor like a synchronous motor with heavy load starting under variable frequency speed regulation, nor will it cause oscillation and loss of step when the load suddenly changes. The permanent magnets of small and medium-capacity brushless DC motors are now mostly made of rare-earth NdFeB materials with high magnetic energy levels. Therefore, the volume of the rare earth permanent magnet brushless motor is reduced by one frame size compared with the three-phase asynchronous motor of the same capacity.
The stator winding of the brushless motor is mostly made into a three-phase symmetrical star connection, which is very similar to the three-phase asynchronous motor. A magnetized permanent magnet is attached to the rotor of the motor. In order to detect the accessibility of the rotor of the motor, a position sensor is installed in the motor. The driver is composed of power electronic devices and integrated circuits, etc., and accepts the start, stop and braking signals of the motor to control the start, stop and braking of the motor.
The operating efficiency, low-speed torque, and rotational speed accuracy of the brushless motor are better than those of the inverter of any control technology, and it has become a driving force for rapid development in the field of modeling, so it deserves the attention of the industry.
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