新能源汽车优点突出,成为各国近来新车发展的主流。电机转速的提高使得工作频率不断升高,容易与定子发生高频共振。定子铁芯的加工工艺会影响定子的模态频率,直接对定子进行数值分析会耗费大量计算资源与时间成本。因此,本文针对粘接定子的动力学建模运用叠片理论、针对焊接定子的简化建模基于半有限元方法,然后利用定子的模态实验验证了本文所建模型的准确性,最后针对焊接定子提出了减振降噪的结构优化设计。结果表明,固结方式直接影响定子的刚度而对其动力学特性产生巨大影响;本文提出的两种建模方法结果精确,在电机设计初期具有指导意义。
关键词:定子叠片;振动噪声;固结方式;影响规律
Abstract
With the increase of the motor speed, the working frequency of the motor increases continuously and it is easy to bring high-frequency resonance with the stator, leading to severe vibration and noise. Two kinds of connective methods affecting dynamic characteristics of the stator lamination core are researched. The lamination theory is used for the dynamic modeling of the bonded stator, and the semi-finite element method is used to simplify the modeling of the welded stator. Natural frequencies of stators with different connecting methods are studied, which are verified by experimental mode analysis. Finally, the optimization design of the welded stator is proposed to reduce the vibration at its work condition. The results show that the consolidation method directly affects the stiffness of the stator and has a huge impact on its dynamic characteristics. The results of the two modeling methods proposed in this paper are accurate and have guiding significance in the initial stage of motor design.
Key words: stator lamination core; vibration and noise; connective method; influence law
关键词
定子叠片 /
振动噪声 /
固结方式 /
影响规律
{{custom_keyword}} /
Key words
stator lamination core /
vibration and noise /
connective method /
influence law
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] Tang Z, Pillay P, Omekanda A M, et al. Young's modulus for laminated machine structures with particular reference to switched reluctance motor vibrations[J]. IEEE transactions on industry applications, 2004, 40(3): 748-754.
[2] Van der Giet M, Kasper K, De Doncker R W, et al. Material parameters for the structural dynamic simulation of electrical machines[C]//2012 XXth international conference on electrical machines. IEEE, 2012: 2994-3000.
[3] Kaimori H, Kameari A, Fujiwara K. FEM computation of magnetic field and iron loss in laminated iron core using homogenization method[J]. IEEE Transactions on Magnetics, 2007, 43(4): 1405-1408.
[4] Luchscheider V, Willner K, Maidorn M. Development of a model to describe the stiffness of an electric motor lamination stack[C]//2012 2nd International Electric Drives Production Conference (EDPC). IEEE, 2012: 1-5.
[5] Luchscheider V, Willner K, Maidorn M. Development of a contact and a material model of laminated stacks[C]//2013 3rd International Electric Drives Production Conference (EDPC). IEEE, 2013: 1-5.
[6] Baloglu M V, Willner K. Numerical homogenization and simulation of a lamination stack[C]//2016 6th International Electric Drives Production Conference (EDPC). IEEE, 2016: 67-72.
[7] Pupadubsin R, Steven A, Widmer J D, et al. Mechanical material properties for structural simulation model of switched reluctance machines[C]//2016 XXII International Conference on Electrical Machines (ICEM). IEEE, 2016: 2293-2299.
[8] 邓文哲, 左曙光, 孙罕, 等. 考虑定子铁芯和绕组各向异性的爪极发电机模态分析[J]. 振动与冲击, 2017, 36(12): 43-49.
DENG Wenzhe, ZUO Shuguang, SUN Han et al. Modal analysis of a claw-pole alternator considering orthotropy of the stator core and windings[J]. Journal of Vibration and Shock, 2017, 36(12): 43-49
[9] 顾磊, 张阳. 焊接球节点单层球面网壳精细化动力分析[J]. 振动与冲击, 2018, 37(14): 130-140
GU Lei, ZHANG Yang. Refined dynamic analysis of a single layer reticulated dome with welded spherical joints[J]. Journal of Vibration and Shock, 2018, 37(14): 130-140.
[10] Nielsen C V, Zhang W, Perret W, et al. Three-dimensional simulations of resistance spot welding[J]. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2015, 229(7): 885-897.
[11] Wang H, Zhang Y, Li S. Laser welding of laminated electrical steels[J]. Journal of Materials Processing Technology, 2016, 230: 99-108.
[12] Gim C K. Plate finite element modeling of laminated plates[J]. Computers & Structures, 1994, 52(1): 157-168.
[13] Gürdal Z, Haftka R T, Hajela P. Design and optimization of laminated composite materials[M]. John Wiley & Sons, 1999.
[14] Ziegler M, Mayr A, Seefried J, et al. Potentials of Process Monitoring During Laser Welding of Electrical Steel Laminations[C]//2019 9th International Electric Drives Production Conference (EDPC). IEEE, 2019: 1-5.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}