转子通风结构对永磁电机转子流体场和温度场的影响  

Influence of the rotor ventilation structure on the rotor fluid and temperature field of the PMSM

作　　者：李伟力[1] 王耀玉 黄东洙[2] 李栋[1] 开志宏 

机构地区：[1]北京交通大学电气工程学院,北京100044 [2]哈尔滨理工大学电气与电子工程学院,哈尔滨150040 [3]江苏利得尔电机制造有限公司,江苏仪征211900

出　　处：《北京交通大学学报》2015年第2期48-54,共7页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：江苏省科技成果转化专项资金资助(E14M00011)

摘　　要：为降低实心转子永磁电机转子温升,以一台全空冷315kW、6kV实心转子永磁电机为例,建立了该电机转子无通风沟的三维全域流体与固体耦合传热数学模型,给出了计算区域边界与假设条件,采用有限体积法求解三维流体与固体耦合传热数学方程组,得到了转子体的温度分布,与实验数据对比验证了计算方法的准确性.由于转子无通风结构,转子体的温度较高.为了降低转子温度,提出了在电机转子上开轴径向通风沟的多种结构方案,研究了转子径向通风沟数量与位置对转子内温度分布及空气运动的影响.结果表明:在转子上开轴径向通风沟能够有效降低转子温度,为实心转子永磁电机通风系统设计提供了理论依据.To reduce the temperature rise of the solid-rotor permanent magnet synchronous motor, this paper takes a 315 kW, 6 kV solid-rotor Permanent Magnet Synchronous Motor（PMSM） as an exam- ple and establishes the three-dimensional（3D） fluid and solid coupling mathematical model of the entire solid-rotor PMSM without rotor ventilation. The boundaries of the computational domain and the as- sumptions are also given. The 3D fluid and solid coupling mathematical equations are solved by finite volume method. When the computations are done, the rotor temperature distribution is obtained. The accuracy of the established model is validated by comparing the calculated results with measured re- sults. Since there are no ventilation grooves on the rotor, the rotor temperature is high. In order to re- duce the temperature of the rotor, some rotor ventilation structures is proposed. The influence of the rotor radial ventilation groove number and position on the rotor temperature distribution and the air in the rotor ventilation groove movement rules are both studied. The results show that the rotor radial and axial ventilation grooves can effectively reduce the temperature rise of the rotor. The results can al- so provide a theoretical foundation for the design of the ventilation system of the solid-rotor PMSM.

关 键 词：永磁电机 温度场 流体场 径向通风沟 

分 类 号：TM313[电气工程—电机]