How to control DC brushless motor? What are the speed control methods?

DC brushless motor structure is reasonable, the speed is basically stable, generally very little significant speed regulation, due to the wide range of motor applications, can be used in many machines, need to adjust different speeds according to different occasions. However, the control and speed regulation methods of DC brushless motors need to be learned, so Vacuz introduces them below!

1. By controlling the order of coil energization, the opposite coils are divided into a group, and the magnetic field in the same direction is generated by the current at the same time.

2. DC brushless motor pole pairs of three, so that each pair of magnetic poles are guided in a certain order to achieve the effect of magnetic field rotation. Under the action of the magnetic field, the middle permanent magnet rotor always has the tendency to keep the same direction of movement of the magnetic field and will rotate with the rotating magnetic field.

3. The stator coil is energized in the next time sequence, and the rotor magnetic field and the stator magnetic field must have a pinch angle. There is no need to determine whether the DC brushless motor has just started, just follow the working status sent back by the sensor to execute the next command.

4. As the rotor rotates, the induced potential of each coil goes from high to zero to reverse. As the coils are energized and reversed, the counter-potential prevents the voltage from reversing, so a trapezoidal wave will appear. If the waveform is relatively ideal, the three sets of coil voltage curves can be obtained by directly integrating the voltage to control the DC brushless motor.

5. Determine the starting direction, first energize the downward coil to turn the rotor to the starting position in a short time, and energize the DC brushless motor by the next time action.

In order to improve the efficiency of the use of DC brushless motor, we need to learn to use different control and speed regulation according to different use environment to improve the efficiency of the use of the motor, the speed can be adjusted using control and speed regulation methods.

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