Reduced Basis Finite Element Modeling of Electrical Machines with Multiconductor Windings

Abstract

Finite element analysis of electrical machines withmulti-conductor windings can be computationally costly. Thispaper proposes a solution to this problem, using a reducedbasis approach. The field-circuit problem is first solved in asingle slot only, with a set of different boundary conditions.These pre-computed solutions are then used as shape functionsto approximate the solution in all slots of the full problem. Apolynomial interpolation method is also proposed for couplingthe slot domains with the rest of the geometry, even if thegeometries or meshes do not fully conform on the boundary.The method is evaluated on several test problems both inthe frequency- and time-domains. According to the simulations,accurate solutions are obtained, 54-90 times faster compared tothe established finite element approach.