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Breakthrough in High Speed Motor Technology: Material and Process Innovation in the 30000 RPM Era
The speed of electric vehicle drive motors has jumped from the traditional 10000 rpm level to 30000 rpm level, and the mass-produced motor speed of companies such as BYD and Tesla has exceeded 30000 rpm. Behind this breakthrough is the collaborative innovation of multi-dimensional technology
Release time:
2025-11-19 17:17
The speed of electric vehicle drive motors has jumped from the traditional 10000 rpm level to 30000 rpm level, and the mass-produced motor speed of companies such as BYD and Tesla has exceeded 30000 rpm. Behind this breakthrough is the collaborative innovation of multi-dimensional technology. The innovation of winding manufacturing process is the core foundation: the flat wire winding reduces the parasitic effect of copper wire through precision rolling and stacked arrangement, and with the help of nanocomposite insulation layer, the temperature resistance level of the motor is raised from F level (155 ℃) to H level (180 ℃), allowing a temperature rise of 20K, providing guarantee for high-speed operation.
The breakthrough in rotor technology is equally crucial: carbon fiber sleeves replace traditional steel rotors, reducing weight by 40% while significantly improving strength. Tesla's next generation permanent magnet motor uses carbon fiber rotors, increasing the speed to 20000 rpm, and coupled with a two speed gearbox, accelerates the vehicle from 0-100 km/h into the 2-second club. The manufacturing process of iron cores has also been upgraded, and the application of ultra-thin electrical steel sheets and nanocrystalline alloy materials has effectively reduced hysteresis losses and eddy current losses; The integrated casting technology of the cooling structure of the chassis has improved the heat dissipation capability. Huawei's intelligent oil cooling technology breaks through the traditional water cooling thermal resistance limitation by fully immersing the stator and rotor in oil, ensuring stable operation at high speeds. The popularization of high-speed motors will further promote the improvement of power and energy efficiency of electric vehicles, and it is expected that the global market share of motors with a speed of over 30000 revolutions per minute will reach 45% by 2027.
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