Steady-state finite element solver for rotor eddy currents in permanent magnet machines using a GMRES approach

Rotor losses can be a significant concern in high-speed permanent magnet machine designs. This paper presents a two-dimensional steady-state finite element solver that calculates eddy current losses in rotors where insulating barriers exist in the 2-D plane. A shooting-Newton/GMRES method is used to determine steady-state operation. This method is shown to be more computationally efficient than performing transient analysis until convergence. The solver is then used to compare the rotor losses of different design choices for a high-speed permanent magnet machine design.