Vibration Analysis of Internal Permanent Magnet Synchronous Machines Under Asymmetric Three-Phase Current Condition

Vibration Analysis of Internal Permanent Magnet Synchronous Machines Under Asymmetric Three-Phase Current Condition
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DOI：
10.1109/ecce.2019.8913037
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发表时间：
2019-09
期刊：
2019 IEEE Energy Conversion Congress and Exposition (ECCE)
影响因子：
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通讯作者：
Jiaxiong Guo;H. Fang;Dawei Li;R. Qu;Yunsong Xu;Tonghao Pei;Yuzhao
Jiaxiong Guo;H. Fang;Dawei Li;R. Qu;Yunsong Xu;Tonghao Pei;Yuzhao
中科院分区：
其他
文献类型：
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作者：
Jiaxiong Guo;H. Fang;Dawei Li;R. Qu;Yunsong Xu;Tonghao Pei;Yuzhao

文献摘要

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内部永磁同步电机普遍存在三相电流不对称的问题，特别是在牵引电机等高负载场合。本文分析了考虑不同转子偏心的IPMSM在三相不对称电流条件下的振动特性。首先，应用麦克斯韦应力张量和对称分量法，分析了输入三相电流幅值和相位不对称时，电磁力谐波随转子偏心或偏心的变化规律。然后，建立了8极48槽IPMSM的有限元模型并进行了仿真，验证了分析结果的正确性。此外，还分析了三相电流不对称和不同转子偏心引起的振动。最后，通过实验验证了数学分析和仿真分析的结果。结果表明，不对称电流对转子偏心电机振动的影响可以忽略不计，而不对称电流与转子静态偏心的相互作用会严重恶化电机的振动性能，此时电机的最大振动为12m/s2，比对称电流下的振动大近6倍。
The asymmetric three-phase current is always found in the internal permanent magnet synchronous machines (IPMSMs), especially for high load applications such as traction motor. In this paper, the vibration characteristics of IPMSMs under asymmetric three-phase current condition are analyzed considering different rotor eccentricities. Firstly, the Maxwell stress tensor and symmetrical component method are applied to obtain the electromagnetic force harmonics analytically with rotor centricity or eccentricity when the input three-phase current is asymmetric in amplitude and phase. Then, the finite element model of an 8-pole 48-slot IPMSM is built and simulated to validate the analytical results. Moreover, the vibrations caused by asymmetric three-phase current and different rotor eccentricities are also analyzed. Finally, an experiment is conducted to verify the results of mathematical and simulation analysis. It is found that the influence of asymmetric current on the rotor centricity machine vibration is negligible, while the interaction of asymmetric current and rotor static eccentricity would seriously deteriorate the vibration performances, the maximum vibration under this condition is 12 m/s2, almost 6 times larger than the vibration under symmetric current.