Rotating electrical machines are becoming ubiquitous as we move towards a more electrified and sustainable world. Torque calculation is an essential task in the design process of rotating machines. In the frame of finite element analysis, the Maxwell stress tensor method is a common technique to calculate the torque exerted on a rigid body. However, the computed torque is strongly mesh-dependent and can be inaccurate. The popular Arkkio method can overcome this problem. But Arkkio's formulation can only calculate the axial torque of conventional radial-flux electrical machines and is unsuitable for axial-flux motors and generators, which are attracting increasing interest due to the power density and efficiency improvements that the axial topology can enable. This article presents an easy-to-implement formulation for calculating the axial torque of axial-flux machines in finite element analysis.

随着我们迈向更加电气化和可持续发展的世界，旋转电机变得无处不在。扭矩计算是旋转机械设计过程中的一项重要任务。在有限元分析的框架下，麦克斯韦应力张量法是计算施加在刚体上的扭矩的常用技术。然而，计算出的扭矩与网格密切相关，并且可能不准确。流行的 Arkkio 方法可以克服这个问题。但 Arkkio 的公式只能计算传统径向磁通电机的轴向扭矩，不适用于轴向磁通电机和发电机，由于轴向拓扑可以实现功率密度和效率的提高，轴向磁通电机和发电机越来越受到人们的关注。本文提出了一种易于实现的公式，用于在有限元分析中计算轴向磁通电机的轴向扭矩。