1. Servo motor: Servo motor is another important component used to control angle, linear speed and position in industrial robots. An electrical signal from the microcontroller determines the amount of movement and thus the desired position of the servo axis. The position of the servo motor is usually controlled by a PWM signal. The servo motor receives the PWM signal from the microcontroller. Although the servo motor is a high-speed motor, it also has some disadvantages, that is, the high cost and the inability to accurately control the rotation.
2. DC motor: DC motor is a motor that runs on DC power. It works by placing a current-carrying conductor in a magnetic field, which is forced to rotate relative to its initial position. In fact, DC motors are composed of excitation windings that provide magnetic flux and armatures that act as conductors. They can generally be divided into brushed DC motors and brushless DC motors. Brushed DC motors are the most commonly used motors at present because they are easy to use. It is miniaturized and provides good rotation control and high efficiency. On the other hand, brushless DC motors have the advantages of easy maintenance, long life and low noise, but they are more expensive than brushed DC motors.
3. Stepper motor: Stepper motor is one of the more complex motors among all motors. In a nutshell, the motor rotates in degree increments and is controlled by pulses, the exact number of turns for each step will vary depending on the manufacturer or model. There are two main types of stepper motors, bipolar and unipolar. Bipolar is a motor with two coils, while unipolar is a motor with two center-tapped coils. Unlike DC motors, the torque of stepper motors decreases with speed.
4. AC motor: AC motor is driven by AC current. When the coil rotates between the two poles of the magnet, it will break the magnetic field line and generate AC current. The AC current can be transmitted through the wire for a long time. AC motors can be divided into two types: asynchronous and synchronous. The asynchronous type is basically composed of a wound stator and a rotor. The power supply is connected to the wire, and the current induces an electromagnetic field in the coil. The strong enough electromagnetic field provides power for the rotor to move. . The synchronous type is a constant speed motor that operates synchronously with the frequency of the AC line, and is usually used where accurate constant speed is required.
