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Detailed introduction to the working principle of angle servo motor

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Last updated:2025-01-17

Angle servo motor is a motor used for precise position control. It is based on a feedback control system and can accurately control the rotation angle of the motor. It is widely used in machine tools, automated production lines, aerospace, medical equipment and other fields, and is an important part of modern industrial automation control. This article will introduce the working principle of angle servo motor in detail, as well as its applications and advantages.

1. Working principle of angle servo motor

The working principle of angle servo motor is based on feedback control system. It detects the rotation angle of the motor through sensors and feeds back the detected information to the controller. The controller adjusts the speed and direction of the motor according to the feedback information to achieve the purpose of accurately controlling the rotation angle of the motor. Below we will introduce the working principle of angle servo motor in detail from three aspects: motor, sensor and controller.

1. Motor part

Angle servo motor usually uses AC motor or DC brushless motor. Since DC brushless motor has better speed response and higher power density, it is more widely used in angle servo motor. DC brushless motor usually consists of three parts: rotor, stator and permanent magnet. There are several electrodes in the air gap between the rotor and the stator, and the electrodes are arranged alternately with the permanent magnets on the rotor.

2. Sensor part

The sensor of the angle servo motor usually adopts a photoelectric encoder, which can detect the rotation angle of the motor and feed back the detected information to the controller. The photoelectric encoder usually consists of three parts: a photoelectric head, a grating code disk and a signal processing circuit. The photoelectric head is a device that can convert light signals into electrical signals. It usually consists of a photodiode and a photosensitive diode. The grating code disk is a disk with a specific coding rule, which can convert the rotation angle into a specific digital signal. The signal processing circuit is used to receive and process the information fed back by the sensor and adjust the speed and direction of the motor according to the feedback information.

3. Controller part

The controller of the angle servo motor usually consists of four parts: a microprocessor, a power supply, a drive circuit and a feedback circuit. The microprocessor is the core part of the controller, which can realize the functions of motor control, encoder signal decoding, feedback control, etc. The power supply is the part that provides electrical energy to the controller and the drive circuit. The drive circuit is used to control the speed and direction of the motor, and the feedback circuit is used to receive the information fed back by the sensor.

2. Application and advantages of angle servo motor

Angle servo motor is widely used in machine tools, automated production lines, aerospace, medical equipment and other fields. It has the following advantages:

1. High precision: Angle servo motor can accurately control the rotation angle of the motor and can meet the requirements of precision machining and positioning control.

2. Fast response speed: Angle servo motor has a fast response speed and can achieve high-speed movement and frequent steering.

3. High energy efficiency ratio: Angle servo motor adopts brushless DC motor, which has higher energy efficiency ratio and longer service life.

4. Good stability: Angle servo motor adopts feedback control system, which has good stability and anti-interference ability.

In short, angle servo motor is an important part of modern industrial automation control field. It has the advantages of high precision, fast response speed, high energy efficiency ratio and good stability, and has broad application prospects in various fields.

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