无轴承永磁薄片电机不同转子结构的对比研究  

Comparison study on bearingless permanent magnet slice motor with different rotor structures

作　　者：李发宇 朱熀秋[1] 祝苏明[1] 钱建林[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《电工电能新技术》2015年第8期7-12,共6页Advanced Technology of Electrical Engineering and Energy

基　　金：江苏省高校科研成果产业化推进工程项目(JHB2012-39);江苏高校优势学科建设工程资助项目(苏政办发〔2011〕6号)

摘　　要：转子结构影响电机的气隙磁通密度,从而影响无轴承永磁薄片电机可控性、转矩脉动以及径向悬浮力等性能。本文从无轴承永磁薄片电机不同的永磁转子结构(表贴式、表面嵌入式、Halbach阵列以及平行充磁环形转子)出发,对其机械强度、磁场分布等进行对比分析。基于麦克斯韦张量法提出了无轴承永磁薄片电机在任意极对数下的数学模型,运用Ansoft对其计算精度进行验证分析,并对具有不同永磁转子结构的无轴承永磁薄片电机径向悬浮力与悬浮力绕组电流之间的关系进行对比分析,得到不同永磁转子结构的优缺点。样机试验验证了仿真结果的正确性,研究结果对无轴承永磁薄片电机转子的参数优化设计具有参考价值。Aiming at the characteristics of the air-flux density affected by the rotor structures,which leads to the effect on the radial suspension force, the suspension property of bearingless permanent magnet slice motor（ BPSM）,starting from the different rotor structures（ surface-mounted rotor,surface-embedded rotor,Halbach array rotor and parallel magnetized ring-shaped rotor）,their basic features,such as mechanical strength,magnetic field distribution,and etc. were analyzed. Based on the Maxwell stress tensor method,the mathematic model of the BPSM under any number of pole-pairs was proposed. The finite element analysis（ FEA） by the software of Ansoft has shown that the proposed method has a good enough accuracy. Then the relationship between the suspension force and the current in the suspension windings of the BPSM with different rotor structures is compared and analyzed,and the advantages and disadvantages of the different rotor structures are obtained. Finally the experiments of the model machine verify the simulation results. The research results can provide a good reference to the parameter optimization of the BPSM in the paper.

关 键 词：无轴承永磁薄片电机 转子结构 径向悬浮力 有限元分析 

分 类 号：TM351[电气工程—电机]