In the field of industrial control, servo motors are widely used. The following editor will analyze the working principle of servo motors for you. First, let's introduce the concept of a servo motor.

What is a Servo Stepper Motor?

A follow-up stepper motor is a motor used to control the operation of machine components in a servo system.

The working principle of servo stepper motor:

The follow-up mainly relies on pulses for positioning. The servo motor can basically be understood as: receiving 1 pulse, it will rotate a corresponding angle to realize displacement, because the servo motor has the function of sending pulses, so the servo motor rotates every angle. , will send out the corresponding number of pulses.

It echoes the pulses received by the servo motor, or is called a closed loop, so that the system can know how many pulses are sent to the servo motor, and the number of pulses received at the same time, so that it can control the rotation of the motor very precisely, so as to achieve accurate Positioning, can reach 0.001mm. DCM is divided into brushed motor and brushless motor.

AC inverter is also a brushless motor, which is divided into synchronous motor and asynchronous motor. At present, synchronous motor is generally used for motion control, which has a large power range and can achieve larger power. The inertia is large, and the rotation speed is also large. With the increase of power, the rotation speed drops rapidly. It is therefore suitable for smooth operation at low speeds.

The rotor in the servo motor is a permanent magnet, and the U/V/W three-phase current controlled by the actuator forms an electromagnetic field. The rotor rotates in this magnetic field. The motor has its own encoder to feed back to the driver, and the driver compares the feedback value with the target value. , adjust the rotation angle of the rotor. The accuracy (number of lines) of the encoder is determined by the accuracy of the servo motor.

The working principle of the servo stepping motor is introduced. The difference between the AC servo motor and the brushless DC servo motor is that the performance of the AC servo motor is better, because it is controlled by a sine wave, and the torque ripple is small.