Conclusion
In this work IGA has been applied to model a PMSM. Since it is possible to parametrize circular arcs exactly, geometric approximations, from which the classical FEMs suffer, are avoided. A multipatch approach is used to model the rotor and the stator separately. The coupling between the two parts has been carried out by iterative substructuring or by using harmonic basis functions. To test the latter so-called harmonic stator–rotor coupling, a test case has been constructed for which the convergence of the spatial discretization has been shown. The harmonic stator–rotor coupling leads to a saddle-point problem for which our setting attains stability. As illustrated by the example, IGA with harmonic stator–rotor coupling is a new and promising alternative to standard finite element procedures for electric machine simulation.
