In this work, the influences on the torque generated by permanent magnet synchronous machines are identified to provide approaches to improve the accuracy of torque calculation. By analyzing the torque generation mechanism, basic machine parameters influencing the generated torque are identified. The machine torque is split into different components, i.e. synchronous, reluctance, and parasitic torque components. The parasitic component results from non-linearities such as saturation. In a second step, environmental and operational conditions influencing those basic parameters are determined. Based on this analysis, the remanence flux density of the permanent magnets, the magnetization behavior of the soft-magnetic material, and the iron losses are selected for the study. Two traction drive machine designs are used in the parameter study. The machine torque is evaluated by performing 2D magnetostatic Finite-Element simulations of the investigated machine designs. The results show quantify the interdependencies between the torque components and the model parameters. The significance of the influence of the parameters on the accuracy of the torque calculation is discussed.

中文翻译：

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对永磁同步电机转矩计算精度的影响

在这项工作中，确定了对永磁同步电机产生的扭矩的影响，以提供提高扭矩计算精度的方法。通过对扭矩产生机理的分析，确定了影响产生扭矩的基本机器参数。机器转矩被分成不同的分量，即同步、磁阻和寄生转矩分量。寄生分量是由诸如饱和之类的非线性引起的。第二步，确定影响这些基本参数的环境和操作条件。基于此分析，选择了永磁体的剩磁通密度、软磁材料的磁化行为和铁损进行研究。在参数研究中使用了两种牵引驱动机器设计。通过对所研究的机器设计执行 2D 静磁有限元模拟来评估机器扭矩。结果显示量化扭矩分量和模型参数之间的相互依赖性。讨论了参数对扭矩计算精度影响的意义。