permanent magnetSynchronous electric spindleThe four performance characteristics of:

1. Simplify the structure and promote the modularization of machine tool structure. Electric spindles can form standardized and serialized products based on their usage, structure, and performance parameters, which can be used by the host to promote the modularization of machine tool structures.

2. Reduce machine tool costs and shorten the development cycle of machine tools. On the one hand, standardized and serialized electric spindle products are easy to form specialized and large-scale production, which can also shorten the development cycle of machine tools and adapt to the rapidly changing market trends.

3. Improve the performance and reliability of machine tools. The CNC machine tool with electric spindle structure simplifies the structure, reduces transmission and connection links, thus improving the reliability of the machine tool; The mature technology, complete functions, excellent performance, and reliable quality of the functional components of the electric spindle make the performance of the machine tool more perfect and the reliability further improved.

4. Implement special requirements for some high-end CNC machine tools. It has promoted the widespread application of high-speed cutting technology in the field of mechanical processing. The electric spindle system is directly driven by a built-in motor, meeting the requirements of high-speed cutting for machine tools in terms of high speed, high precision, high reliability, and low vibration. Together with the high-speed feed system and high-speed tool system of the machine tool, it constitutes the necessary conditions for high-speed cutting.

Compared with others, permanent magnet synchronous electric spindles have the following advantages: low overall power loss, no rotor loss, and high efficiency; The motor has a small volume; The air gap magnetic density generated by the rotor magnet has a high power factor. Obviously, the use of permanent magnet synchronous motors can effectively improve the thermal characteristics of electric spindles. Therefore, studying the design and thermal characteristics of permanent magnet synchronous electric spindles is a necessary attempt to promote the further application of electric spindles in high-speed machining.

The overall design and assembly of permanent magnet synchronous electric spindle. According to the requirements of the design indicators, the main components of the spindle, such as the spindle motor, the puller mechanism, the supporting bearings and their lubrication device, the cooling device, and the speed feedback device, have been determined to achieve the overall scheme design. On the basis of precision machining and precision decoration of key components, a complete machine debugging environment for the spindle unit has been established.

In depth analysis was conducted on the drive control of permanent magnet synchronous electric spindle, and the speed characteristics of the electric spindle unit were studied. The influence of different control parameters on the speed performance indicators of the electric spindle was obtained, and the control parameters of the driver were optimized, resulting in better use of the permanent magnet synchronous electric spindle.