Isogeometric Analysis and Harmonic Stator-Rotor Coupling for Simulating Electric Machines
For engineers simulating electric machines, this work offers a more accurate and geometrically exact simulation method, though it is an incremental improvement over existing FEM approaches.
This work proposes Isogeometric Analysis (IGA) as an alternative to finite elements for simulating electric machines, achieving exact geometry representation in the air gap and enabling rotation via harmonic stator-rotor coupling. The method is validated on a permanent magnet synchronous machine, showing improved accuracy over classical FEM.
This work proposes Isogeometric Analysis as an alternative to classical finite elements for simulating electric machines. Through the spline-based Isogeometric discretization it is possible to parametrize the circular arcs exactly, thereby avoiding any geometrical error in the representation of the air gap where a high accuracy is mandatory. To increase the generality of the method, and to allow rotation, the rotor and the stator computational domains are constructed independently as multipatch entities. The two subdomains are then coupled using harmonic basis functions at the interface which gives rise to a saddle-point problem. The properties of Isogeometric Analysis combined with harmonic stator-rotor coupling are presented. The results and performance of the new approach are compared to the ones for a classical finite element method using a permanent magnet synchronous machine as an example.