永磁同步电机三维全域温度场与温度应力耦合研究  

Coupling study of 3D universal temperature field and temperature stress for permanent magnet synchronous motor

作　　者：丁树业 朱敏 江欣 

机构地区：[1]南京师范大学电气与自动化工程学院,江苏南京210042

出　　处：《电机与控制学报》2018年第1期53-60,71,共9页Electric Machines and Control

基　　金：哈尔滨市科技创新人才项目(2016RAXXJ026);国家自然科学基金(51277045)

摘　　要：永磁同步电机通常采用变频驱动方式,使得电机磁场内谐波含量增多,损耗趋于增大并导致发热与形变加重。为研究其变频驱动下温升分布特性及温度应力的作用,以一台50 k W永磁同步电机为对象,建立了包含复杂散热结构的三维全域温度场及温度应力共同求解模型,采用有限元法对其进行耦合计算与研究,着重分析了稳态运行时电机主要部位的温升与形变分布情况。通过搭建实验平台,将实测温升与计算结果相对比,验证了温度场计算方法及结果的准确性,并确保温度应力场载荷加载正确。结果表明:永磁同步电机的最高温升出现在转子铁心处;电机各部位形变大小不仅受温升作用,还受自身结构以及施加约束等因素影响。该研究为电机设计及性能优化、故障预测提供一定参考。Permanent magnet synchronous motor （ PMSM ） usually adopts frequency conversion driving, which makes harmonic content in the magnetic field of motor increased. The heat aas the raise of loss. In order to study the temperature rise distribution and the effect of temperature stressunder frequency conversion driving, a 50 kW PMSM was taken as the research object. The common solu-tion model of 3D universal temperature field and temperature stress which contained the complex coolingstructure was established. Using the finite element metliod （ FEM） for coupling calculation and research of motor, the temperature rise and deformation distribution of motor main parts in steady-state operationwere analyzed emphatically. Through building experimental platform, the measured temperatucalculating result were compared to verify the accuracy of temperature field calculatiowhich also ensured the correctness of setting load for temperature stress field. It indicates that the highest temperature rise of PMSM appears in the rotor core. Deformation of each part in motor is not only effected by temperature rise, but also influenced by the factors of structure and constraint. The ssome reference for motor design, performance optimization and fault prediction.

关 键 词：永磁同步电机 温度场 温度应力 有限元法 变频驱动 

分 类 号：TM341[电气工程—电机]