What is a servo motor?

Here is the servo motor definition. A servo motor is a type of electric device used in closed loop system to rotate machine parts with high efficiency and precision. Such servomotors are capable of controlling important mechanical functional parameters, such as position, speed and torque using servo drive which are very crucial for any mechanical applications.

What are servo motors used for?

There are a wide application of servo motors in industry because of their compact size, low noise, high precision and accuracy, high durability, energy efficiency and high reliability. Most of the manufacturer needs servo motor for controlling position, rotating objects at precise angles, shifting and moving the objects at precise distances in CNC machines, forming machines, CNC lathes and bending machines for metal fabrication, robots, 3D printers, medical equipment, industrial automation equipment, AGV wheels and other industrial applications.

Different types of servo motors

Generally speaking, there are some different types of servos based on applications.

  • AC servo motor and DC servo motor – The primary difference between both AC servo motor and DC servo motor is in the inherit ability to control the speed. AC servo motor in the control system features reliable stability, good speed and high precision. In DC servo motor, speed is directly proportional to the supply voltage with constant load, while in AC servo motor, speed depends on frequency of applied voltage and number of magnetic poles of motor not on applied voltage.
  • Brushed servo motor and brushless servo motor – There are some difference between brushed servo motor and brushless servo motor. Firstly, brushed servo motor is less expensive and easy to operate. On the contrary, brushless servo motor is more reliable and have high efficiency and less noisy. Additionally, a DC servmotor is commutated with the brushes. While a DC brushless servo motor adopts encoder, instead of brushes and commutator to achieve communications.

Parts of a servo motor 

Servo motor comprises dozens of parts which makes it highly effective and efficient. Each and every parts contributes a vital role in the device functionality. Main parts of industrial servo motor are stator, winding, shaft, rotor, encoder, servo motor driver, and additional brake and gear box.

  1. Stator: it is stationary component of electromagnetic circuits in servo motor and creates a rotating magnetic field to efficiently generate torque. 
  2. Winding: Set of copper coils winding over the stator has different number of turns and different coil shape. Current flows in the coils to produce rotating magnetic field.
  3. Rotor: It's a permanent magnet that is attached to the motor's shaft and mounted by the two bearings.
  4. Shaft: Servo motor shaft is made of highly rigid and durability material. It transmits the electric power of motor into mechanical rotating power to drive the equipment connected to shaft.
  5. Encoder: Servomotor encoder measures the position of shaft, rotation angle, speed, travel distance, torque and transmits the positional feedback to the controller by determining the number of rotations being completed by shaft. Peaco support customize servo motors with absolute encoder and incremental encoder
  6. Servo motor driver: The servo motor drive is also called servo motor controller, is an electronic amplifier used to power electric servomechanism by monitoring the feedback signal from servomechanism in closed loop and adjust the deviation expected behavior. 
  7. Brake Servo: It’s the additional part of the servo motor that is attached at the back of servo motor. Servo motor brake plays an important role in holding load in place when the servo motor drive fails or power is lost.
  8. Gearbox: A set of gears are assembled over each other inside the gear box casing to reduce the speed of motor and increase the  torque where high torque is required. Gear box is basically mounted to the shaft of servo motor. Each type of gearbox has its own advantages and disadvantages, which gearbox is suitable for you depends on your particular application and feasibility to install. Some common gears are spur gear box, helical gear box, worm gearbox and planetary gearbox. Peaco Support uses highly advanced planetary gearbox and worm gearbox with AC servo motor and DC servo motor.

Application of servo motor

Servo motors are devices designed to convert the voltage signal into torque and speed to drive the controlled object, can control the speed with high precise position.

Servo motors are widely utilized in automobiles, robots, 3D printings, medical instruments, AGV wheels, machinery industrial equipment, CNC machines, lathes, milling, advanced robot grinding machine, tool making industry, casting machining, grinding operation, packing & fabrication machine, electric two-wheeler, commercial and passenger vehicles and other industrial equipment.

Buy servo motors in Peaco Support. As a reliable servo motor manufacturer and supplier, Peaco Support provides a complete solution of both DC servo motor and AC servo motor. Such precision servo motors can be matched with optional servo motor drive, gearbox and brake with high quality and at highly competitive price.