考虑电流谐波的永磁同步电机电磁振动和噪声半解析模型

发布时间：2018-06-23 03:58

本文选题：永磁同步电机 + 电磁力　；参考：《电工技术学报》2017年09期

【摘要】：提出了一种永磁同步电机快速半解析计算模型,可以分析常见的电流谐波对振动和噪声的影响,并提高了计算效率。首先通过解析和有限元相结合的方法计算了永磁体磁通密度和气隙比磁导,并建立了考虑任意电流波形的电枢磁通密度的解析模型,通过麦克斯韦应力张量方程计算径向电磁力,与有限元计算的电磁力吻合较好。其次通过二维傅里叶变换得到了特定空间阶数电磁力的频率成分,并基于壳体振动和声辐射模型分别计算了定子表面振动和噪声,计算结果能够反映实测振动噪声的主要峰值和分布。最后分析了电流谐波引起的振动噪声的阶次特征和峰值变化。该文提出的半解析模型为在设计阶段考虑电机的振动和噪声提出了一种有效分析方法。
[Abstract]:A fast semi-analytical model of permanent magnet synchronous motor (PMSM) is presented, which can analyze the effect of current harmonics on vibration and noise, and improve the efficiency of calculation. Firstly, the flux density and air-gap specific magnetic conductivity of permanent magnets are calculated by means of analytical method and finite element method, and an analytical model of armature flux density considering arbitrary current waveform is established. The radial electromagnetic force calculated by Maxwell stress Zhang Liang equation is in good agreement with that calculated by finite element method. Secondly, the frequency components of electromagnetic force of special space order are obtained by two-dimensional Fourier transform, and the stator surface vibration and noise are calculated based on shell vibration and acoustic radiation model, respectively. The calculated results can reflect the main peak value and distribution of the measured vibration noise. Finally, the order characteristic and peak value change of vibration noise caused by current harmonics are analyzed. The semi-analytical model proposed in this paper provides an effective analysis method for considering the vibration and noise of the motor in the design phase.
【作者单位】：同济大学新能源汽车工程中心;
【基金】：国家自然科学基金项目(51375343) 国家重大科学仪器设备开发专项(2012YQ150256)资助
【分类号】：TM341

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