DD motor, also known as Direct Drive Motor, is a product of the development of servo technology and has a series of unique advantages and application values. The following is a detailed analysis of the DD motor:
1、 Definition and Characteristics
DD motor is a direct drive motor that does not require reduction devices such as belts, gears, ball screws, etc. It is also known as an electronic rotary worktable or torque motor. It continues the characteristics of servo motors and has unique features such as low-speed high torque, high-precision positioning, high response speed, simple structure, reduced mechanical losses, low noise, and minimal maintenance.
2、 Structure and Working Principle
The structure of DD motor mainly includes stator, rotor, and magnetic field. The stator is the stationary part of the motor, consisting of a circular iron core, windings, and a three-phase power supply system, responsible for generating a magnetic field. The rotor is the rotating part of a motor, composed of permanent magnets that generate rotational force under the action of an electromagnetic field, thereby driving the operation of the motor. The magnetic field is generated by the stator, which forms a current by supplying power to the winding. The current creates a magnetic field in the winding, achieving precise control over the operation of the motor.
In addition, DD motors also include auxiliary components such as sensors, controllers, and power supplies. Sensors are used to sense information such as motor speed, position, and load. The controller precisely controls the motor based on feedback signals from the sensors, while the power supply provides the electrical energy required for the motor to operate.
3、 Advantages and Applications
High efficiency: Due to the absence of traditional reversing devices and brushes, DD motors eliminate friction and energy loss, and their efficiency can usually reach over 90%.
High torque: The rotor generates a magnetic field through permanent magnets, without relying on external magnetic fields, thus it can produce a large torque.
Precise control: The controller can adjust the current of the winding in real time based on the specific information feedback from the sensor, thereby accurately controlling the speed and position of the motor.
Simplified system structure: eliminating mechanical structures such as reducers, improving system accuracy, and eliminating efficiency losses caused by the use of reducers.
Low noise and minimal maintenance: Due to its simple structure, it reduces friction and vibration of mechanical components, thereby reducing noise and minimizing maintenance requirements.
DD motors are widely used in various industries due to their unique advantages, including papermaking, metal processing, cable and wire, machinery manufacturing, textiles, rubber, and plastics. At the same time, in situations where high dynamic response, high-precision positioning, low-speed high torque and other characteristics are required, such as chip sorting machines, high-end washing and drying integrated machines, DD motors have also demonstrated excellent performance.
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