Servo Motor Working Principle and Application

In a motor where precision and control are paramount, the servo motor takes center stage. But What is the servo motor working principle and application?

This blog post will serve as your gateway to the fascinating realm of servo motors, shedding light on their fundamental principles and the diverse array of fields they influence.

At its core, a servo motor operates on a principle that sets it apart from its hobby servo or conventional counterparts: the closed-loop control system. This system allows it to continuously compare its actual output with the desired output and make real-time adjustments, ensuring accuracy and consistency.

As we journey through this exploration, we’ll dive into the intricate workings of servo motors, dissecting their components, and deciphering their various types.

Servo Motor Principles

A servo motor is a type of motor that can rotate with great precision. Normally this type of motor consists of a control circuit that provides feedback on the current position of the motor shaft, this feedback allows the servo motors to rotate with great precision.

The basic principle of a servo motor is to maintain a desired position, speed, or torque by continuously comparing the actual output with the desired output and adjusting accordingly. This real-time feedback signal is what sets servo motors apart.

The servo motor’s key components

Servo motors comprise three key components: the motor stator rotor, an encoder for feedback, and a controller. The motor is responsible for generating mechanical motion control, while the encoder provides data on the motor’s current position. The controller interprets this feedback and makes adjustments to maintain the desired state.

servo motor working principle and application

types of servo-electric motors

There are different types of servo motors, including AC motors, DC motors, and brushless servo motors. Each type has its own advantages and is suited to specific applications. AC servo motors, for example, offer excellent speed and torque precise control, making them ideal for industrial robots and CNC machines.

Applications of Servo Motors

Now that we’ve grasped the principles of servo motors, let’s explore where they find their applications.

Robotics and Automation

Servo motors are the workhorses of industrial applications such as robotics and automation. They power the movements of industrial robots used in manufacturing and assembly lines. CNC machines, responsible for precision machining tasks, also heavily rely on servo motors for accurate positioning.

Aerospace Industry

In the aerospace sector, servo motors are crucial for controlling various mechanisms, including aircraft control surfaces. They ensure that planes respond swiftly and accurately to pilot commands. Additionally, servo motors play a pivotal role in the drone industry, enabling precise flight control.

Automotive Industry

You may not see them, but servo motors are prevalent in your car. They power electric power steering systems, enabling responsive and effortless steering. Cruise control systems, too, use servo motors to maintain constant speeds.

Consumer Electronics

Servo motors are behind the scenes in many consumer electronic devices. They stabilize camera systems, allowing photographers and videographers to capture shake-free images and videos. In the realm of 3D printing, servo motors control the movement of print heads and build platforms, ensuring layer accuracy.

Medical Devices

Surgical robots that assist in minimally invasive procedures are heavily reliant on servo motors for precision and stability. Prosthetic limbs equipped with servo motors provide amputees with greater mobility and control.

servo motor application

Custom servo motor iron core from Motorneo

Our expertise extends to the realm of custom electric motor laminations, catering to a diverse range of servo motor types and designs.

Whether it’s a brushed DC servo motor, a brushless DC servo motor, or an AC servo motor, our skilled engineers excel in crafting laminations that perfectly align with the unique characteristics and specifications of your electric motor.

We also customize DC motor cores, induction motor cores, and stepper motor cores.

The manufacturing process itself involves advanced stamping techniques, laser cutting, and precision machining. These methods ensure that each lamination is created to exacting standards, minimizing energy losses and enhancing the overall efficiency of your servo motor.

progressive stator rotor self-riveting Process


In conclusion, we have learned about the servo motor working principle and application, types, precision control in motion, etc.

We have seen that servo motors are electric motors that allow for precise control of angular or linear position, speed, and torque. They consist of a motor, a sensor, and a controller that form a closed-loop feedback system.

We have also seen that servo motors have a wide range of applications in various fields and industries, such as robotics, CNC machinery, automated manufacturing, medical equipment, etc.

For us, as a motor lamination manufacturer in China, understanding the significance of servo motors is crucial. These motors rely on high-quality components, including precision-crafted laminations, to achieve the accuracy and efficiency they’re known for.


How are servo motor laminations manufactured?

Servo motor laminations manufacturing through the use of a precision stamping process(such as compound stamping, progressive stamping, and rotary notching).

This involves feeding a continuous strip of electrical steel (often silicon steel) through a die set, where it is stamped and cut into laminations with precise shapes and dimensions. These laminations are then stacked and insulated to create the motor’s core.

What are some common troubleshooting tips for servo motors?

To troubleshoot servo motor issues, focus on preventing overheating, addressing position drift, and mitigating electrical noise. Regular cleaning, lubrication, and inspection also help maintain optimal performance.

What are the advantages of using a servo motor?

High Precision: Servo motors provide high accuracy and accurate controllers over position, velocity, and torque.

Fast Response Time: Servo motors have rapid response times, making them suitable for applications that require quick and precise adjustments, such as tracking moving objects or maintaining tight tolerances during manufacturing.

High Torque-to-Inertia Ratio: Servo motors typically offer high torque relative to their size and weight, allowing for compact and efficient designs. This is particularly advantageous in applications with space constraints.

Variable Speed and Torque: Servo motors can operate over a wide range of speeds and torque levels, offering flexibility in various applications. They can deliver torque at low speeds and maintain constant speed under varying loads.

Closed-Loop Control: Servo systems use feedback devices like encoders or resolvers to continuously monitor and adjust the motor’s position. This closed-loop control ensures precise and consistent performance, even in the presence of external disturbances.

Energy Efficiency: They are highly efficient, with low electrical losses and a high power density, allowing smaller motors to generate more torque.

Smooth Operation: They provide smooth and consistent motion, reducing vibrations and minimizing wear and tear on mechanical components. This feature is valuable in applications that require gentle handling or fine surface finishes.

Wide Range of Applications: Servo drive motors find applications in a wide range of industries, including manufacturing, aerospace, automotive, robotics, medical devices, and more. Their versatility and adaptability make them suitable for diverse tasks.

Compatibility with Automation: Servo motors are often integrated into automated systems, enhancing the efficiency and productivity of industrial processes. They can communicate with PLCs and other control systems for seamless automation.

Try to contact us for high-quality motor cores in China.