The development trend of linear motors at home and abroad, our direct drive motor for everyone to explain the linear motor in the high-speed, high-precision development of the first push in the modern machine tool industry applications. The driving mechanism of traditional machine tools relies on screw drive. The screw drive itself has a series of unfavorable factors, including: length limitation, mechanical backlash, friction, distortion, pitch error, long vibration attenuation time, and coupling with the motor. Inertia and axial compression of the screw. All of these factors limit the efficiency and accuracy of traditional drive devices. When equipment wears out, it must be constantly adjusted to ensure the required accuracy. The linear motor drive technology can ensure a relatively high level of performance and has higher efficiency and simplicity than conventional motor drives that convert rotational motion into linear motion, with the high speed and accuracy that conventional drives cannot achieve. In recent years, the development trend of linear motors at home and abroad can be summarized in three aspects, namely: First, develop to high-speed and high-precision; Second, develop to large thrust and large capacity; Third, to the development of logistics equipment.
The advantages of linear motors for machine tool applications can be simply described as follows:
1) The length of the stroke is not limited
With the stator laying of the linear motor, the stroke length of the mover can be infinitely extended.
2) High transmission stiffness and smooth thrust
"Direct drive" improves the stiffness of the drive and the layout of the linear motor. It can be arranged according to the machine's guide surface configuration and the force conditions of the table during movement. It is usually designed to be evenly symmetrical so that the thrust of the movement is stable.
3) High speed, short acceleration and deceleration process
The linear motor feed system of the machine tool can meet the ultra-high speed cutting feed rate of 60-100m/min or more. Due to its high-speed response, the acceleration and deceleration processes are greatly shortened, and the acceleration can generally reach (2-10) g.
4) High responsiveness
In general, the dynamic response time of an electrical component is smaller than that of a mechanical transmission by several orders of magnitude. Since the mechanical transmission components such as the lead screw with large response time are eliminated in the system, the dynamic response performance of the entire closed-loop servo system is greatly improved.
5) High precision
Due to the cancellation of the mechanical transmission mechanism such as the screw, the tracking error caused by the lag of the conventional system is reduced. Through the high-precision linear displacement sensor, the position detection and feedback control can greatly improve the precision of the machine tool's positioning, and its precision error can reach 0.001μm.
Lotus 100 focus on the field of precision micro-control motors, the main business scope includes: Shenzhen unmanned aerial vehicles, helicopter motors, fixed-wing motors, agricultural plant protection drones, brushless PTZ special motor, DC motor, multi-rotor special brushless motor, Ship model turbine motor and other products.
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