1.Basic principles of servo motors
Servo motors are motors used to precisely control position, speed and acceleration. They control the rotation angle or linear displacement based on the principle of feedback control.
A servo motor system usually consists of three parts: the motor itself, the driver and the encoder. The driver converts the current into the rotation or linear displacement of the motor, and the encoder can feedback the specific position and speed information. When the set position is inconsistent with the actual position, the system will automatically adjust the current output to correct the error, thereby achieving precise control.
Compared with other motors, servo motors have higher precision and faster response, and are suitable for occasions with high precision requirements.
2.Common materials for servo motors
1.Magnet material: Magnets are the power source for the rotation and linear motion of servo motors. The main materials used are permanent magnet materials, hard magnetic materials and soft magnetic materials.
2.Winding materials: The windings of servo motors are made of highly conductive copper wire and high-temperature bite-resistant insulation materials to ensure the stability of the motor for long-term operation.
3.Bearing materials: Servo motors mainly use wear-resistant and corrosion-resistant stainless steel bearings and ceramic bearings to reduce mechanical wear and increase service life.
4.Shell material: The servo motor shell generally adopts aluminum alloy and engineering plastics, which have excellent heat insulation, sound insulation and corrosion resistance, and also have good processing performance and are easy to manufacture.
3.Advantages and disadvantages of servo motor materials
1.Magnet material: The advantages of permanent magnetic material are high coercivity and high remanence density, while the advantages of hard magnetic material are high saturation magnetic induction intensity and high energy consumption, and the disadvantage is easy magnetization saturation. Soft magnetic material has excellent magnetic permeability and low coercivity, but its saturation magnetic induction intensity is low and easy to saturate.
2.Winding material: High conductive copper wire has good conductivity and the ability to maintain a shape without deformation, good heat resistance, and can resist damage under long-term continuous working environment. High temperature bite-resistant insulation material can prevent high temperature resistant wires from bonding and maintain insulation performance.
3.Bearing material: Stainless steel bearings have high strength and hardness, and good corrosion resistance, while ceramic bearings have higher hardness and life, but are relatively brittle and easy to wear.
4.Shell material: Aluminum alloy material has good rigidity and strength, and also has good heat dissipation performance. Engineering plastics have the characteristics of high heat resistance, toughness resistance, and high mechanical strength, but they are prone to plastic creep.
4.Summary
This article introduces the basic principles and common materials of servo motors, and analyzes the advantages and disadvantages of different materials. Servo motor technology has broad application prospects in modern industrial production, robotics, and other fields, providing important support for achieving more efficient and precise industrial production.
