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2023

Servo motor working principle

Author：

Hangzhou Hehui

The working principle of the servo motor is to convert the voltage signal into torque and speed by receiving the voltage signal to drive the control object. Specifically, when the servo motor receives a voltage signal, it will convert it into a torque and speed to make the motor rotate. The rotation speed and torque of the motor are proportional to the voltage signal, so the control of the motor speed and torque can be realized by controlling the voltage signal.

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The rotor inside the servo motor usually adopts a permanent magnet structure. The driver forms an electromagnetic field by controlling the on-off of the three-phase electricity, and the rotor rotates under the action of the electromagnetic field. At the same time, the motor built-in encoder will feedback the rotation angle and speed of the motor at any time, so that the driver can accurately control the speed and torque of the motor.

Servo motor has the characteristics of high precision, high response and high reliability, so it is widely used in automatic control system. Through the servo motor, precise position control, speed control and torque control can be realized to ensure high precision and high quality in the production process.

In addition, according to different application requirements, there are many types and specifications of servo motors to choose from. For example, different types of servo motors can be selected according to the output power, speed range, accuracy level, protection level, etc. At the same time, different drivers and control methods can be selected according to needs to achieve flexible control of the servo motor.

In short, the working principle of the servo motor is to convert the voltage signal into torque and speed by receiving the voltage signal to drive the control object. By accurately controlling the voltage signal, a high-precision and high-reliability production process can be realized.