Frequently Asked Questions About Servo Motor

Many questions are asked about servo motors. As Şahin Rulman, we will try to answer your questions such as 'What is a servo motor?', 'How does a servo motor work?', 'What is the internal structure of a servo motor?', 'Where are servo motors used?' in our blog post this week. We hope this will be a useful blog post for those looking for information about servo motors, and we wish you a pleasant read.

What is a Servo Motor?

Servo motor, thanks to the feedback control system, detects and corrects the error in the operation of the mechanism, It is the name given to the engine system that ensures high level adjustment, acceleration and speed control. In other words, it is a system that eliminates errors and therefore increases working efficiency by keeping movement control at the maximum level, especially in operations that require very fine adjustments in movement and position.

Servo Motor Types

You need to choose among servo motor types according to your working performance. The desired performance should be taken into consideration when operating the servo motor, which has two different types: AC servo motor and DC servo motor. AC (brushless) servo motors are mostly used in large-scale projects requiring high power. Torque and power controls of DC (brushed) servo motors are easier than AC servo motors. DC servo motors are mostly preferred for small applications. Thanks to the features of the internal structure of servo motors, there is also a servo motor model with brake. Servo motors with brakes protect the servo motor by stopping it at moments when the risk is high and the servo may be damaged.

AC and DC servo motor difference in our relevant blog article.

How Does Servo Motor Work?

In this section of our article, we will talk about the details of the servo motor operating principle. There is an encoder connected to servo motors that can be used with computer-aided systems. The encoder transmits the necessary signals to the servo driver in order to constantly control the direction, angle and speed of the servo motor. The servo motor driver activates the servo motor in line with the signals it receives. With the help of feedback signals, the accuracy level of the commands given to the servo motor is determined. In this way, full control over the operations to be performed is ensured and efficiency is increased by reducing the margin of error.
We have presented general information about the servo motor operating principle. We can offer a more detailed explanation for those who need more detailed information about the servo motor operating principle:

Since the servo motor is better equipped than other motor types in terms of operating principle, it is also different in terms of price. If we examine the working principles of servo motors; The signals coming through the PLC or PC connection are transmitted through the position control and current amplifier and come to the servo motor. From here on, the work is completed by providing the power required for the movement of the load by the servo motor.

There are two types of servo motors: brushed (AC Servo Motor) and brushless (Servo Motor). You can use AC motors in projects that require high performance, as well as in projects that require low power performance. Even though it has a simple internal structure, it shows an uninterrupted working performance. DC servo motors have a lower usage rate compared to AC servo motor types. DC servo motors are also more affordable than AC servo motors.

Servo motor drivers are used to control servo motors via PLC or PC connection. It must be adjusted by entering the drive parameter values with the servo motor driver that complies with the servo motor specifications. Servo motors vary according to power, torque, speed and flange size. Generally, when you buy a servo motor, the servo motor, servo motor driver, motor and driver cables, and signal cable are sold as a set. The types of servo motors that you can purchase from Şahin Rulman website are servo motor SG series and braked servo motors. The motors in the servo motor SG series vary between 0.40 kW and 5.50 kW. Servo motors with brakes start from 1kw.

Characteristic of Servo Motors