Conformal mapping approach for permanent magnet synchronous machines: on the modeling of saturation
Conformal mapping approach for permanent magnet synchronous machines: on the modeling of saturation
复制标题
永磁同步电机的共形映射方法：饱和建模
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
K. Hameyer
中科院分区：
文献类型：
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作者：
M. Hafner;D. Franck;K. Hameyer
在现代伺服驱动器的电磁场仿真中，计算更高的时间和空间谐波对于预测转矩脉动、径向力、涟漪转矩和齿槽转矩是必不可少的。采用保角变换（CM）技术的场计算是一种计算径向和切向场分量的有效方法。在标准CM方法中，齿槽转矩模拟以及过载操作的计算结果观察到由于忽略槽泄漏和饱和效应而导致的与非线性有限元（FE）模拟的偏差。本文提出了经典CM的扩展。附加的CM参数从单个有限元计算中计算，以便在电驱动的宽操作范围内考虑模型中以上列出的两种效应。将所提出的方法应用于表面式永磁同步电机（SM-PMSM），并与有限元分析（FEA）获得的数值结果进行比较。获得了与有限元模拟相似的精度，但计算时间较短，这是分析模型的特征。
: In the electromagnetic field simulation of modern servo drives, the computation of higher time and space harmonics is essential to predict torque pulsations, radial forces, ripple torques and cogging torque. Field computation by conformal mapping (CM) techniques is a time-effective method to compute the radial and tangential field components. In the standard CM approach, computational results of cogging torque simulations as well as overload operations observe deviations to nonlinear finite element (FE) simulations due to the neglection of slot leakage and saturation effects. This paper presents an extension of the classical CM. Additional CM parameters are computed from single finite element computations so as to consider both effects listed above in the model over a wide operation range of the electrical drive. The proposed approach is applied to a surface permanent magnet synchronous machine (SM-PMSM), and compared to numerical results obtained by finite element analysis (FEA). An accuracy similar to that of FE simulations is obtained with however the low computation time that is characteristic for analytical models.