Movement is the primary reason for the existence of many electrical machines. Modeling movement can often be very expensive. In some circumstances where the moving object is invariant in the direction of motion, this approach can be simplified using methods, such as the Minkowski transform. In the general case, where the moving object is not as above, many solutions of nonlinear equations by time-stepping techniques can be required. Some methods developed in the past have stood the test of time and others have proved to be less useful.

中文翻译：

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电机建模运动

运动是存在许多电机的主要原因。建模运动通常可能非常昂贵。在某些情况下，运动对象在运动方向上是不变的，可以使用诸如Minkowski变换之类的方法简化此方法。在通常情况下，在运动对象不是上述情况的情况下，可能需要通过时步技术来解决非线性方程的许多问题。过去开发的某些方法经受了时间的考验，而另一些方法则被证明不太有用。