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The multi-slice method for the design of a tubular linear motor with a skewed reaction rail

A fundamental disadvantage of 3-dimensional finite-element simulations is high computational cost when compared to 2-dimensional models. However, for 3-dimensional specific features full models are essential, in principle. An approach to avoid this necessity is the multi-slice method. It is a well known procedure to determine the torque of electrical machines with a skewed rotor only deploying slices of the 3-dimensional full model. This paper presents the adoption of this method to a tubular linear motor and shows that it is applicable for this kind of machine as well. Furthermore, the number of slices and thereby computation time is minimised at the same accuracy of the simulation results.