高速无轴承永磁电机设计与分析

摘要

High-speed motor had some merits such as high power density,contact volume,smaller weight,and could directly drive load,so it had wide application prospects in the fields of aviation,new energy and precision manufacture.The bearingless permanent magnet motor was used in high-speed drive system.Based on the introduction of mathematical model,the design methods of high-speed bearingless permanent magnet type motor were principally discussed.The electromagnetic and mechanical design of a rated speed 8 000 r/min,speed range 0 ～ 60 000 r/min,2 500 W high-speed bearingless permanent magnet motor was accomplished.Both the electromagnetic and dynamic performances of the motor were optimized based on finite element method.The simulation and experimental research results showed that the design method of high-speed bearingless permanent magnet motor proposed was correct and feasible.%高速电机具有高功率密度、能够减小设备体积与重量,可以直接驱动负载、提高传动效率,在航空航天、新能源、精密制造等领域具有广阔的应用前景.将无轴承永磁电机应用于高速驱动系统,在推导无轴承永磁电机数学模型基础上,提出了高速无轴承永磁电机设计方法.通过对一台额定功率2300W、额定转速8 000 r/rain、调速范围0-60 000 r/min的高速无轴承永磁电机进行电磁和机械一体化设计,并采用有限元法对样机的电磁性能和动力学性能进行优化.仿真试验结果验证了所采用的设计方法的正确性.