Heat and thermal problems are major obstacles to achieving high power density in compact permanent magnet(PM)topologies.Consequently,a comprehensive,accurate,and rapid temperature rise estimation method is required fo...Heat and thermal problems are major obstacles to achieving high power density in compact permanent magnet(PM)topologies.Consequently,a comprehensive,accurate,and rapid temperature rise estimation method is required for novel electric machines to ensure safe and reliable operations.A unique three-dimensional(3D)lumped parameter thermal network(LPTN)is presented for accurate thermal modeling of a newly developed outer-rotor hybrid-PM flux switching generator(OR-HPMFSG)for direct-drive applications.First,the losses of the OR-HPMFSG are calculated using 3D finite element analysis(FEA).Subsequently,all machine components considering the thermal contact resistance,anisotropic thermal conductivity of materials,and various heat flow paths are comprehensively modeled based on the thermal resistances.In the proposed 3-D LPTN,internal nodes are considered to predict the average temperature as well as the hot spots of all active and passive components.Experimental measurements are performed on a prototype OR-HPMFSG to validate the efficiency of the 3-D LPTN.A comparison of the results at various operating points between the developed 3-D LPTN,experimental test,and FEA indicates that the 3-D LPTN quickly approximates the hotspot and mean temperature of all components under both transient and steady states with high accuracy.展开更多
提出一种椭球型混合式磁路结构的永磁转子同步电机,电机的面贴式永磁体设计为弧形结构,通过机械和电磁参数计算,初步设计得到一台额定功率为3 k W的新型结构电机模型。针对该电机中弧形面贴式永磁体,进行了正弦性的几何参数优化设计;再...提出一种椭球型混合式磁路结构的永磁转子同步电机,电机的面贴式永磁体设计为弧形结构,通过机械和电磁参数计算,初步设计得到一台额定功率为3 k W的新型结构电机模型。针对该电机中弧形面贴式永磁体,进行了正弦性的几何参数优化设计;再次,采用有限元分析法分别建立了所提出电机的初步设计结构和优化设计结构的电磁模型;最后,通过对两种有限元模型进行仿真分析,得到了电机的气隙磁通密度波形和相应的分析结果,验证了所提出电机结构的优越性和优化设计的必要性。展开更多
文摘Heat and thermal problems are major obstacles to achieving high power density in compact permanent magnet(PM)topologies.Consequently,a comprehensive,accurate,and rapid temperature rise estimation method is required for novel electric machines to ensure safe and reliable operations.A unique three-dimensional(3D)lumped parameter thermal network(LPTN)is presented for accurate thermal modeling of a newly developed outer-rotor hybrid-PM flux switching generator(OR-HPMFSG)for direct-drive applications.First,the losses of the OR-HPMFSG are calculated using 3D finite element analysis(FEA).Subsequently,all machine components considering the thermal contact resistance,anisotropic thermal conductivity of materials,and various heat flow paths are comprehensively modeled based on the thermal resistances.In the proposed 3-D LPTN,internal nodes are considered to predict the average temperature as well as the hot spots of all active and passive components.Experimental measurements are performed on a prototype OR-HPMFSG to validate the efficiency of the 3-D LPTN.A comparison of the results at various operating points between the developed 3-D LPTN,experimental test,and FEA indicates that the 3-D LPTN quickly approximates the hotspot and mean temperature of all components under both transient and steady states with high accuracy.
文摘提出一种椭球型混合式磁路结构的永磁转子同步电机,电机的面贴式永磁体设计为弧形结构,通过机械和电磁参数计算,初步设计得到一台额定功率为3 k W的新型结构电机模型。针对该电机中弧形面贴式永磁体,进行了正弦性的几何参数优化设计;再次,采用有限元分析法分别建立了所提出电机的初步设计结构和优化设计结构的电磁模型;最后,通过对两种有限元模型进行仿真分析,得到了电机的气隙磁通密度波形和相应的分析结果,验证了所提出电机结构的优越性和优化设计的必要性。
