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
宋金元,蒋伟康. 硅钢片固结方式对新能源汽车电机模态特性影响的研究[J]. 振动与冲击, 2023, 42(1): 267-272.
SONG Jinyuan, JIANG Weikang. Effects of silicon steel sheets consolidation mode on modal characteristics of new energy vehicle motor. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(1): 267-272.
[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.