The manufacturing level of high-precision motors in China has achieved remarkable progress and demonstrated strong capabilities in various aspects as follows:
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Technical R&D and Innovation Capabilities
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Breakthroughs in Key Technologies: In the field of high-speed magnetic levitation permanent magnet motors, the "Beijing Engineering Technology Research Center for High-speed Magnetic Levitation Motor Technology and Application" of Beihang University has overcome a number of key process technologies, including the overall structural design of high-speed magnetic levitation motors, the design of three-degree-of-freedom permanent magnet-biased hybrid magnetic bearings, and the stable control of ultra-high-speed magnetic bearing rotor systems. It has successfully developed the first domestic 30kW ultra-high-speed magnetic levitation permanent magnet motor, filling the domestic gap in this field. In terms of linear motors, companies such as Gree Electric Appliances Inc. of Zhuhai and other units jointly developed high-performance linear servo motors and drivers, which achieved an effective combination of high thrust density and low thrust ripple, significantly improving the speed and positioning accuracy of the linear servo motor system.
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Achievements in Independent Innovation: Some domestic enterprises, such as JASUNG, have independently developed high-performance rare earth permanent magnet materials like neodymium iron boron (NdFeB) magnets, advanced stator and rotor structures, and high-precision Field-Oriented Control (FOC) technology, which have significantly reduced energy consumption and improved the operating efficiency of motors. Their products have strong competitiveness in the global market.
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Manufacturing Processes and Precision Control
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Improvement in Machining Precision: For example, the nuclear power main shaft processed by Dongfang Electric Corporation's Dongfang Electric Machinery Co., Ltd. weighs nearly 250 tons. The journal, as the supporting part of the shaft bearing, requires a runout of less than 0.01 mm in machining precision, and current technology can fully meet this level. Through digital transformation, Harbin Electric Machinery Factory has improved the machining precision from the original millimeter level to 0.1 mm.
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Application of Advanced Manufacturing Technologies: Additive manufacturing technology such as 3D printing has been applied in motor manufacturing. For example, Dongfang Electric Corporation carried out 3D printing additive manufacturing of the runner of a 500 MW impulse hydro-generator set in the "China's First Span" workshop. It can be remotely controlled, and multiple robots can operate without human presence. It can also achieve customized design and the effect of "what you weld is what you get", and the surface roughness of the runner can reach a mirror effect.
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Product Performance and Quality
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Advanced Performance Indicators: Domestic linear motors have reached the same level as the world's top international brands in core indicators such as high precision, high efficiency, and high reliability, and have even surpassed them in some aspects. The permanent magnet industrial motors of JASUNG have become a benchmark for technical strength in the industrial motor field with higher efficiency, more reliable performance, and a wider range of applications.
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Strict Quality Control: Domestic enterprises implement strict quality management systems. From raw material procurement to the production process and then to finished product inspection, every link follows high-standard quality control procedures to ensure product quality. For example, the linear motors produced by enterprises such as Zhongyan Yingchuang have shown good stability and reliability in practical applications, meeting the high-end application requirements of high-precision automation equipment, precision measurement, high-speed machining, etc.
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Industrial Development and Market Competitiveness
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Expansion of Industrial Scale: There are numerous motor manufacturing enterprises in China, and the industrial scale is continuously expanding. Enterprises like Wuhu Deli Motor Co., Ltd. have formed a certain production scale, and their products cover multiple series and are sold well in domestic and foreign markets.
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Increase in Market Share: The permanent magnet drums and industrial permanent magnet direct drive motors of JASUNG have maintained the first global market share for four consecutive years, and their brand influence in the global industrial motor market is growing day by day. Domestic linear motors are also gradually breaking the market monopoly of imported products and showing a strong substitution trend.
Overall, the manufacturing level of high-precision motors in China is constantly improving. Great progress has been made in technical R&D, manufacturing processes, product performance, and industrial development, and its competitiveness in the international market is also increasing day by day.
