With the continuous development of science and technology, the motor industry is becoming more and more developed, motor products are constantly updated, such as brushless DC motor products, compared to the previous brush motor, all aspects of performance has been greatly improved, but for many friends, is not very well understood the structure and working principle of brushless DC motor, Vacuz briefly introduce to you! Hope it can help everyone!

Harjaton tasavirtamoottori

1.DC brushless motor structure

Brushless motors are similar to brushed motors in that they both have a rotor and a stator, but the structure is the opposite of a brushed motor. The rotor of a brush motor is a coil winding connected to the power output shaft, and the stator is a permanent magnet.

A brushless motor has a permanent magnet rotor, which is connected to the output shaft along with the housing, and a winding coil stator. Brushless motor used to alternately change the electromagnetic field of the commutation brush removed, so called brushless motor.

2. Working principle of brushless DC motor

Simply put, by changing the alternating frequency and waveform of the current wave input to the stator coil of a brushless motor, a magnetic field is formed around the winding coil that rotates around the geometric axis of the motor. This magnetic field drives the permanent magnet steel pieces on the rotor to rotate, and then the motor rotates. The performance of the motor is related to the number of magnets, the flux strength of the magnets, the input voltage of the motor and other factors, and more closely related to the control performance of the brushless motor.

Since the input is DC, the current needs to be changed to three-phase AC by the electronic speed regulator, and it also needs to receive control signals to control the motor speed to meet the usage requirements of the model.

Generally speaking, the structure of brushless motor is relatively simple, and it is the brushless electronic governor that really determines its performance. A good electronic governor requires MCU control program design, circuit design, complex machining process and other processes of overall control, so the price is much higher than brush motors.

The above is the structure and working principle of brushless DC motor, with the development of science and technology, brushless DC motor is widely used in automotive, power tools, industrial industrial control, automation and aerospace, etc., with full potential for development.

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