The numerical calculation of the electromagnetic fields within a permanent magnet synchronous machine (PMSM) is sensitive to the magnetic characteristic of steel and permanent magnets. The objective of this work is to quantify the impact of magnetization curve uncertainties on the performance of a PMSM and its drive system. Our approach is as follows. First, we construct stochastic models that reflect the uncertainties in B–H curves and PM remanent flux density. Second, to overcome the computational limitations of finite element analysis, we replace it with surrogate models based on Gaussian process regression. Third, we perform uncertainty propagation studies to assess the combined effect of steel and PM uncertainties on the maximum average torque vs. speed characteristics and the minimum dc-link voltage.

中文翻译：

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同步电机驱动器钢和永磁体磁特性不确定度的量化和传播

永磁同步电机 (PMSM) 内电磁场的数值计算对钢和永磁体的磁特性很敏感。这项工作的目的是量化磁化曲线不确定性对 PMSM 及其驱动系统性能的影响。我们的方法如下。首先，我们构建了反映 B-H 曲线和 PM 剩余通量密度的不确定性的随机模型。其次，为了克服有限元分析的计算限制，我们将其替换为基于高斯过程回归的代理模型。第三，我们进行了不确定性传播研究，以评估钢铁和 PM 不确定性对最大平均扭矩与速度特性以及最小直流母线电压的综合影响。