What are the categories of servo motors?

As a core component in the field of industrial automation and precision control, servo motors are classified in various ways. The following provides a detailed introduction from different dimensions:
1、 Classified by current type
DC Servo Motor
Features: Powered by DC power supply, simple structure, easy control, fast response speed.
Application: It was widely used in fields such as robotics and CNC machine tools in the early days, but with the development of AC servo technology, the market share has gradually been occupied by AC servo motors.
AC Servo Motor
Features: Powered by AC power supply, using vector control or direct torque control technology, it has the advantages of high precision, high response, and wide speed range.
Category:
Synchronous servo motor: The speed and power frequency are strictly synchronized, suitable for scenarios that require high-precision position control.
Asynchronous servo motor: The speed is slightly lower than the power frequency, the structure is simple, the cost is low, but the control accuracy is slightly lower than that of synchronous servo motor.
Application: Widely used in industrial automation, robotics, CNC machine tools, printing machinery, packaging machinery and other fields.
2、 Classified by purpose
Industrial automation servo motor
Features: Emphasize high precision, high reliability, long lifespan, and adaptability to harsh industrial environments.
Application: Used in scenarios such as automated production lines, assembly lines, and material handling.
Robot servo motor
Characteristics: Requires small size, light weight, high torque, and fast response to achieve flexible movement of the robot.
Application: Used for industrial robots, service robots, special robots, etc.
CNC machine tool servo motor
Characteristics: High precision, high stiffness, and low vibration are required to ensure machining accuracy and surface quality.
Application: Used for CNC lathes, CNC milling machines, CNC machining centers, etc.
Special servo motor
Features: Designed for specific application scenarios, such as explosion-proof servo motors, high-temperature servo motors, low-temperature servo motors, etc.
Application: Used in special environments such as chemical, petroleum, aerospace, etc.
3、 Classified by structure
Rotating servo motor
Features: Output rotational motion, which is the most common type of servo motor.
Category:
Cylindrical servo motor: compact structure, suitable for most application scenarios.
Flat servo motor: with short axial dimensions, suitable for space limited scenarios.
linear servo motor
Features: Directly output linear motion without intermediate transmission mechanism, with advantages such as high precision, high speed, and high acceleration.
Category:
Iron core linear servo motor: with high thrust, suitable for heavy-duty scenarios.
Ironless linear servo motor: No cogging effect, smooth motion, suitable for high-precision scenarios.
Application: Used in semiconductor manufacturing equipment, precision machining equipment, medical equipment, etc.
4、 Classified by control method
Position control servo motor
Features: Accurate position control is achieved through encoder feedback, suitable for scenarios that require precise positioning.
Application: Used for CNC machine tools, robots, printing machinery, etc.
Speed control servo motor
Features: Accurate speed control is achieved through feedback from speed sensors, suitable for scenarios that require constant or variable speed operation.
Application: Used for fans, pumps, compressors, etc.
Torque controlled servo motor
Features: Accurate torque control is achieved through torque sensor feedback, suitable for scenarios that require constant or variable torque operation.
Application: Used for winding machines, tension control equipment, etc.
5、 Classified by Technological Development Trends
Traditional servo motor
Features: Adopting analog control or digital control technology, stable performance, but limited level of intelligence.
Application: Widely used in traditional industrial fields.
Intelligent servo motor
Features: Integrated sensors, controllers, communication modules, etc., with intelligent functions such as self diagnosis, adaptation, and self-learning.
Application: Used in emerging fields such as intelligent manufacturing, Internet of Things, Industry 4.0, etc.
Networked servo motor
Features: Supports communication protocols such as fieldbus and industrial Ethernet, enabling remote monitoring, diagnosis, and programming.
Application: Used for distributed control systems, flexible manufacturing systems, etc.
Modular servo motor
Features: Integrating motors, drivers, encoders, etc. into one module simplifies system design and improves reliability.
Application: Used for automation equipment, robots, CNC machine tools, etc.