Views: 0 Author: Site Editor Publish Time: 2025-08-25 Origin: Site
In the world of modern automation and motion control, AC servo motors stand as one of the most efficient, precise, and widely used devices. They play a vital role in robotics, CNC machinery, automation systems, and industrial applications where high accuracy, speed, and reliability are required. Understanding what an AC servo motor is, how it works, and where it is applied is crucial for industries seeking to optimize performance and efficiency.
An AC servo motor is a type of electric motor controlled by alternating current (AC) and integrated with a servo mechanism. Unlike conventional motors, it is designed to provide precise control of angular or linear position, velocity, and acceleration. It works in closed-loop systems, meaning it constantly receives feedback from sensors to ensure accurate movement according to the command signals.
In simple terms, an AC servo motor converts electrical energy into controlled mechanical motion, making it highly suitable for applications that demand accuracy and stability.
AC servo motors are one of the most essential components in modern automation, robotics, and CNC machinery. Their precision, efficiency, and responsiveness make them indispensable in applications requiring accurate motion control. To fully understand their working principle, it’s important to explore their construction, components, and operation in detail.
To understand how AC servo motors work, we need to break down their essential parts:
The stator is the stationary part of the motor that generates a rotating magnetic field when AC power is applied.
In most cases, it is wound with three-phase windings to produce a synchronous rotating magnetic field.
The rotor is the rotating part connected to the load.
It can be squirrel cage type or wound rotor type, depending on the design.
Modern AC servo motors usually feature permanent magnet rotors for higher efficiency and torque density.
A position encoder or resolver provides real-time feedback to the servo drive.
It continuously monitors position, speed, and direction, ensuring the motor follows the command precisely.
The servo drive supplies power to the motor while processing feedback from the encoder.
It adjusts voltage, frequency, and current to control motor speed and torque.
It ensures closed-loop control, correcting errors instantly for maximum accuracy.
The operation of an AC servo motor can be explained in three primary steps:
A control system (such as a PLC, CNC controller, or microcontroller) sends a command signal representing the desired movement. This signal typically indicates position, speed, or torque requirements.
The servo drive interprets the input command and supplies the motor with the required AC voltage and frequency. Based on the feedback from the encoder, it continuously adjusts power to minimize error between the actual and desired performance.
The stator generates a rotating magnetic field, which interacts with the rotor’s magnetic field, producing torque.
The rotor turns, driving the connected load.
The encoder measures the actual position and speed, sending feedback to the drive.
The system forms a closed-loop control, where deviations are corrected instantly, ensuring high precision and smooth motion.
AC servo motors can be broadly classified into the following types:
Operates with two-phase AC supply.
Known for compact design and simplicity.
Commonly used in light-duty applications.
Works on three-phase AC supply, offering higher power.
More robust and widely used in industrial automation.
Provides better efficiency and torque.
Rotor speed is synchronized with the stator field.
Offers excellent precision and control.
Preferred in robotics and CNC machines.
Rotor speed lags behind the rotating magnetic field.
Suitable for applications where extreme accuracy is not critical.
Cost-effective compared to synchronous types.
Some of the most important features that make AC servo motors stand out include:
High Precision – Thanks to closed-loop feedback systems.
Wide Speed Range – Capable of operating at very low or very high speeds.
High Torque-to-Inertia Ratio – Quick acceleration and deceleration.
Excellent Reliability – Long service life with minimal maintenance.
Compact Size – Suitable for integration in small and complex systems.
Energy Efficiency – Optimized power usage for industrial automation.
China has become a global leader in the AC servo motor industry, offering world-class technology, competitive pricing, and strong supply chains. From robotics and CNC machinery to packaging and medical equipment, Chinese AC servo motor manufacturers deliver high-performance solutions tailored to a wide range of industries. Below, we highlight the top 25 AC servo motor manufacturers in China, complete with company profiles, main products, and unique advantages.
Delta Electronics, a leading AC servo motor manufacturer headquartered in Taiwan with strong operations in mainland China, is one of the world's leading providers of automation solutions.
AC servo motors
Servo drives
Industrial automation systems
Global presence with strong R&D support
Highly reliable servo motor systems
Extensive service network in China and beyond
Inovance Technology is a Shenzhen-based automation leading AC servo motor manufacturer specializing in motion control systems and industrial automation.
AC servo motors and drives
PLCs and HMIs
Variable frequency drives
Strong focus on innovation
Cost-effective automation solutions
Trusted by major OEMs in China
Founded in 1997, Leadshine is one of the leading AC servo motor manufacturers of motion control technology in China.
AC servo motors
Digital stepper drives
Motion controllers
Extensive product range for motion control
Strong market share in China and overseas
Affordable pricing with reliable performance
Jkongmotor is a leading AC servo motor manufacturer specializing in servo drive systems and robotics.
AC servo motors and drives
Industrial robots
Automation solutions
Integrated servo motors
Stepper motors
Brushless dc motors
Comprehensive servo and robotic solutions
Trusted supplier for global robotics companies
Robust R&D infrastructure
Located in Guangzhou, GSK CNC is one of the largest leading AC servo motor manufacturers of CNC systems and servo drives in China.
AC servo motors
CNC controllers
Automation solutions
Extensive distribution network in China
Integrated CNC and servo motor packages
High reliability for industrial applications
A fast-growing leading AC servo motor manufacturer specializing in servo motors, stepper motors, and control systems.
AC servo motors
Closed-loop stepper systems
Motion control products
Flexible customization for OEMs
Strong technical support
Competitive pricing
Kinco Automation is a leading AC servo motor manufacturer known for its motion control, HMI, and servo systems catering to automation industries.
AC servo motors
Servo drives
HMIs and PLCs
Well-integrated product portfolio
Suitable for cost-sensitive markets
Reliable after-sales service
A high-tech leading AC servo motor manufacturer specializing in servo and motion control systems.
AC servo motors
Servo drives
CNC controllers
Strong focus on motion accuracy
Tailored solutions for machine tool industries
ISO-certified production facilities
Huada Motor, a leading AC servo motor manufacturer based in Zhejiang, manufactures a wide range of servo motors and industrial motors.
AC servo motors
Brushless DC motors
Stepper motors
Large-scale production capacity
Affordable and durable solutions
Widely used in domestic machinery
A leading AC servo motor manufacturer focusing on intelligent transmission and motion control systems.
AC servo motors
Harmonic reducers
Robotics solutions
Strong technological innovation
Trusted partner in robotics industry
Excellent market presence in Asia
BesFoc is a leading AC servo motor manufacturer and specializes in industrial automation, motion control, and servo systems.
AC servo drives and motors
Frequency inverters
Motion controllers
High-performance servo products
Energy-efficient designs
Wide range of industry applications
A leading AC servo motor manufacturer of servo motors and drives with years of experience in automation.
AC servo motors
Servo drives
Stepper systems
Competitive cost-to-performance ratio
Proven quality in precision applications
Strong technical expertise
A leading AC servo motor manufacturer in CNC equipment and servo solutions.
AC servo motors
CNC controllers
Automation systems
Integrated CNC + servo systems
Widely used in machining centers
Strong R&D capabilities
LeanMotor is a leading AC servo motor manufacturer and specializes in servo motors and customized motion control solutions.
AC servo motors
Linear servo motors
Drives and controllers
High precision products
Customization options for OEMs
Used in robotics and automation
STEP Electric is a leading AC servo motor manufacturer and provides comprehensive automation and motion control products.
AC servo motors
Servo drives
Industrial robots
Integrated robotics and motion solutions
Listed company with strong reputation
High efficiency and performance
Subsidiary of Shihlin Electric Taiwan with operations in mainland China.
AC servo motors
Servo drives
Automation components
Taiwan-based technology with local service
Reliable motor performance
Wide application in packaging and CNC
Manufacturer of industrial motors and ac servo systems.
AC servo motors
Induction motors
Drives
Cost-effective solutions
Strong domestic presence
Flexible product customization
Hairong is a leading AC servo motor manufacturer and produces high-quality servo motors, stepper motors, and brushless DC motors.
AC servo motors
Stepper motors
BLDC motors
High efficiency
Robust quality testing
Large production scale
A leading AC servo motor manufacturer in servo systems and automation technology in Wuxi.
AC servo motors
Servo drives
Industrial robots
Comprehensive automation solutions
Trusted in robotics and machine tools
Advanced servo drive technology
Joint venture between Teco Group Taiwan and local Chinese operations.
AC servo motors
Drives
Industrial motors
Taiwan-based R&D with local manufacturing
Wide customer base
Reliable industrial motor solutions
Specializes in stepper and servo motors with over 20 years of experience.
AC servo motors
Hybrid stepper motors
BLDC motors
Flexible OEM services
Global customer base
Strong production capacity
High-tech leading AC servo motor manufacturer focused on precision servo motors and drives.
AC servo motors
Linear motors
Drives
High precision performance
Customized motion solutions
Trusted by automation integrators
Joint venture with Sanyo Japan, producing servo motors and industrial motors.
AC servo motors
Servo drives
Industrial automation motors
Japanese technology with Chinese manufacturing
High quality standards
Widely applied in precision machinery
Well-established leading AC servo motor manufacturer of servo systems and automation products.
AC servo motors
Servo drives
Automation controllers
Focus on stable performance
Reliable after-sales support
Used in CNC and robotics industries
A leading Chinese AC servo motor manufacturer providing industrial control and servo solutions.
AC servo motors
Motion control systems
Industrial controllers
Listed company with international presence
Advanced R&D and innovation
Strong solutions for large-scale industries
Compared to traditional motors, AC servo motors provide superior performance in terms of accuracy, speed regulation, energy efficiency, and operational lifespan. Below, we will explore the comprehensive advantages of AC servo motors and their importance in today's industries.
One of the most prominent advantages of AC servo motors is their ability to deliver high-precision control. Equipped with feedback devices such as encoders or resolvers, these motors constantly monitor and adjust their position, speed, and torque.
Position Accuracy: Capable of sub-micron level positioning, AC servo motors ensure outstanding repeatability in demanding applications such as CNC machinery and robotics.
Stable Speed Control: Even at low speeds, they maintain exceptional stability without oscillation.
Closed-Loop Feedback: The closed-loop system ensures real-time adjustments, reducing errors and increasing reliability.
AC servo motors are designed to optimize energy consumption, making them an eco-friendly and cost-effective solution.
Optimized Power Usage: They draw only the required power according to load, preventing unnecessary energy waste.
Low Heat Generation: Efficient design minimizes heat buildup, which not only saves energy but also extends motor lifespan.
Cost-Effective in Long-Term Operations: Lower energy bills and reduced downtime make them highly economical.
AC servo motors excel in delivering high dynamic response and a wide range of speed adjustments.
Fast Acceleration and Deceleration: Their quick response allows smooth performance in high-speed automation systems.
Broad Speed Range: Capable of running efficiently at both very low and very high speeds.
Consistent Performance: Ideal for applications requiring frequent start-stop cycles without loss of accuracy.
Torque is a critical factor in many applications, and AC servo motors are renowned for their high torque-to-inertia ratio.
Strong Low-Speed Torque: Essential for tasks like robotics, conveyor systems, and injection molding machines.
High Torque at High Speed: Unlike conventional motors, AC servo motors maintain torque even at elevated speeds.
Smooth Motion Control: Ensures vibration-free operation, crucial for precision manufacturing.
Designed with advanced engineering, AC servo motors offer robust durability and long operational life.
Low Maintenance: Their closed-loop systems minimize wear and tear, reducing the need for frequent servicing.
High Reliability: Consistent operation even in demanding environments.
Reduced Mechanical Stress: Soft start and stop functions lower mechanical impact on components.
AC servo motors are widely used across industries due to their adaptability and multi-functional capabilities.
Industrial Automation: Robotics, packaging machines, CNC equipment, and assembly lines.
Medical Equipment: Precision instruments requiring accuracy and stability.
Renewable Energy: Used in solar tracking systems and wind turbine control.
Consumer Electronics: Automated devices and smart machinery.
Modern AC servo motors are designed to integrate seamlessly with PLC systems, motion controllers, and industrial networks.
Compatibility with Advanced Controls: Enables complex automation tasks.
Real-Time Monitoring: Feedback systems provide constant updates for safe and precise operations.
Flexible Programming: Supports multiple communication protocols for easy system integration.
The advantages of AC servo motors—ranging from high precision, efficiency, and torque performance to their adaptability across industries—make them indispensable in modern automation and control systems. Their reliability and superior control capabilities ensure that industries can achieve higher productivity, lower costs, and long-term sustainability.
AC servo motors are essential components in modern automation and motion control systems. With their ability to provide precise position, speed, and torque control, they are widely adopted across industries that demand accuracy, efficiency, and reliability. Below, we present a detailed overview of the major applications of AC servo motors in various fields.
AC servo motors are a cornerstone in industrial automation systems, ensuring efficiency, consistency, and productivity.
CNC Machines: Servo motors drive the axes of CNC milling, lathes, and grinding machines, offering sub-micron positioning accuracy.
Packaging Machinery: In food, pharmaceutical, and consumer goods industries, they control cutting, labeling, filling, and sealing processes with precision.
Assembly Lines: Provide synchronized motion for automated assembly and conveyor systems.
Robotics is one of the most significant fields that relies on AC servo motors due to their high dynamic response and torque control.
Industrial Robots: Articulated robots use servo motors for joint control, enabling smooth, precise, and repeatable movements.
Collaborative Robots (Cobots): Designed to safely work alongside humans, they rely on servo motors for accuracy and safety.
Autonomous Robots: Applications in logistics, warehousing, and healthcare utilize servo motors for reliable mobility and handling.
In healthcare and medical technology, AC servo motors ensure accuracy, smooth operation, and safety.
MRI and CT Scanners: Control patient positioning systems with high precision.
Surgical Robots: Enable minimally invasive surgery with steady and exact movement.
Laboratory Automation: Support automated sample handling, pipetting, and testing machines.
Industries that require continuous and precise motion depend heavily on servo motors.
Printing Presses: Provide accurate control of rollers, feeders, and cutting units for high-speed printing.
Textile Machinery: Control yarn feeding, weaving, and knitting machines with exceptional accuracy to maintain fabric quality.
The semiconductor industry demands micron-level accuracy where servo motors excel.
Wafer Handling Systems: Servo motors ensure smooth positioning and transfer of delicate wafers.
PCB Assembly Machines: Drive pick-and-place systems with rapid yet accurate movements.
Display Manufacturing: Provide consistent alignment in LED and LCD production.
As industries move toward sustainable solutions, servo motors play a vital role in energy systems.
Solar Tracking Systems: Adjust solar panels to follow the sun's position, improving efficiency.
Wind Turbine Control: Regulate blade pitch angles to maximize energy capture while maintaining safety.
AC servo motors provide precision, reliability, and durability required in critical aerospace and defense applications.
Flight Simulators: Ensure realistic motion control for pilot training systems.
Satellite Systems: Servo-driven mechanisms support antenna positioning and solar panel deployment.
Weapon Systems: Control targeting, aiming, and stabilization systems.
In addition to industrial applications, servo motors also power modern consumer technologies.
3D Printers: Deliver exact control for high-quality printing results.
Smart Appliances: Used in automatic coffee machines, sewing machines, and household robots.
Gaming and Simulation: Provide haptic feedback and motion in simulators and entertainment devices.
The applications of AC servo motors are vast and diverse, spanning industries from manufacturing and robotics to healthcare, renewable energy, aerospace, and consumer electronics. Their precision, reliability, and adaptability make them an indispensable technology for driving innovation and efficiency in today's world.
| Parameter | AC Servo Motor | DC Servo Motor |
|---|---|---|
| Power Supply | Works on AC | Works on DC |
| Maintenance | Low, due to no brushes | Higher, due to brush wear |
| Efficiency | High efficiency, low losses | Less efficient compared to AC |
| Speed Range | Wide | Limited |
| Applications | Industrial, robotics, CNC, automation | Small devices, light-duty controls |
This comparison highlights why AC servo motors dominate industrial sectors requiring precision and durability.
With the rise of Industry 4.0, IoT-based automation, and smart factories, the demand for AC servo motors is only expected to grow. Integration with AI-based control systems, enhanced energy efficiency, and miniaturization trends are paving the way for even more advanced servo motor technologies.
An AC servo motor is not just another type of electric motor—it is a critical component of modern automation and robotics. With its precision, efficiency, and reliability, it continues to revolutionize industries ranging from manufacturing to aerospace. Understanding its working principle, components, types, and applications allows us to appreciate why it is a preferred choice for advanced motion control systems.
The above list highlights the top 25 AC servo motor manufacturers in China, offering advanced technology, robust solutions, and competitive pricing. These companies are not only supporting China's manufacturing industry but also contributing significantly to the global automation market.
