Analysis of Vibration Characteristics Considering the Modulation Effect According to Rotor Bars of Induction Motor for EVs

IF 1.6 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Electrical Engineering & Technology Pub Date : 2024-09-12 DOI:10.1007/s42835-024-02031-2
Nam-Ho Kim, Jae-Hoon Cho, Jin Hwan Lee, Sang-Yong Jung
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Abstract

The predominant method for mitigating vibrations in electric vehicle (EV) propulsion motors involves utilizing electromagnetic strategies to reduce air-gap electromagnetic force (AEMF) orders. This study investigates the origins of AEMFs that significantly induce vibrations in induction motor (IM) models with 6-poles and 54-slots. Initially, it is revealed through spatial harmonic analysis of winding distribution factors that harmonics of same magnitude to the fundamental component play a crucial role in the harmonics of the armature reaction (critical order). Subsequently, it analytically examines and compares the sources of vibration orders of AEMFs. The conditions for determining the rotor slot number are provided to avoid vibration orders that induce significant vibrations. To prove this, this paper utilizes 2D-FEA to calculate AEMFs at rated operating point for both the 44-bar and 70-bar models, confirming the substantial contribution of the critical order of MMF to lower vibration orders in the 44-bar model. Conversely, the 70-bar model exhibits significantly reduced forces due to the absence of correlation between lower vibration orders and the critical order of MMF. After that, considering the modulation effect of high vibration orders caused by rotor slots and slip effects, the forces are calculated by vector summation with lower vibration orders for all operating speeds. This comparison confirms that the 44-bar model generates larger AEMFs compared to the 70-bar model. Finally, through coupling analysis, it demonstrates that the 70-bar model is advantageous in terms of vibration compared to the 44-bar model.

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考虑电动汽车感应电机转子杆调制效应的振动特性分析
减轻电动汽车(EV)推进电机振动的主要方法是利用电磁策略来减少气隙电磁力(AEMF)指令。本研究调查了在具有 6 极和 54 槽的感应电机 (IM) 模型中显著诱发振动的 AEMF 的起源。首先,通过对绕组分布系数的空间谐波分析发现,与基波分量大小相同的谐波在电枢反作用谐波(临界阶)中起着至关重要的作用。随后,对 AEMF 的振动阶次来源进行了分析和比较。本文提供了确定转子槽数的条件,以避免引起显著振动的振动阶次。为了证明这一点,本文利用 2D-FEA 计算了 44 杆和 70 杆模型在额定工作点的 AEMF,证实了在 44 杆模型中,MMF 的临界阶数对较低振动阶数有很大影响。相反,由于低振动阶数与 MMF 临界阶数之间不存在相关性,70-bar 模型的力明显减小。之后,考虑到转子槽和滑移效应引起的高振动阶数的调制效应,通过矢量求和计算了所有运行速度下较低振动阶数的力。比较结果表明,与 70 杆模型相比,44 杆模型产生的 AEMF 更大。最后,通过耦合分析表明,与 44 杆模型相比,70 杆模型在振动方面更具优势。
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来源期刊
Journal of Electrical Engineering & Technology
Journal of Electrical Engineering & Technology ENGINEERING, ELECTRICAL & ELECTRONIC-
CiteScore
4.00
自引率
15.80%
发文量
321
审稿时长
3.8 months
期刊介绍: ournal of Electrical Engineering and Technology (JEET), which is the official publication of the Korean Institute of Electrical Engineers (KIEE) being published bimonthly, released the first issue in March 2006.The journal is open to submission from scholars and experts in the wide areas of electrical engineering technologies. The scope of the journal includes all issues in the field of Electrical Engineering and Technology. Included are techniques for electrical power engineering, electrical machinery and energy conversion systems, electrophysics and applications, information and controls.
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