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Hunan University has successfully developed China's first high-speed precision permanent magnet synchronous electric spindle by applying the research outcomes of the National Natural Science Foundation of China. This breakthrough has brought the country's technology in this field to an internationally advanced level. The product is primarily designed for modern high-speed machining equipment, including machining centers, grinders, milling machines, lathes, and drilling machines.
The spindle integrates advanced design principles for dynamic thermal characteristics, precision manufacturing, and high-accuracy assembly. It features high-speed ceramic ball hybrid bearings, oil-gas lubrication systems, and cutting-edge motor and drive technologies. These innovations have led to several national patents being granted. Key performance metrics include a maximum speed of 18,000 rpm, a motor power of 35 kW, a system stiffness of 346 N/μm, a rotational accuracy of 0.0015 mm, and a dynamic balance accuracy of G0.
According to expert evaluations organized by the Department of Science and Technology of Hunan Province, the technology behind this electric spindle is well-established, with significant breakthroughs in the core design and engineering of high-speed precision permanent magnet synchronous spindles. The product is expected to have strong market potential, and its research achievements are recognized as being at the forefront of global standards. This development marks a major milestone in China’s advancement in high-performance machine tool technology.