Synchronous reluctance machine flux barrier design based on the flux line patterns in a solid rotor

The paper focuses on the synchronous reluctance machine rotor design. The rotor's shape in this machine should maximize the flux passing in the d axis while minimizing the flux in its q axis. This can be achieved by designing the rotor to respect the natural flow of the flux in the d axis in order to reduce the magnetic resistance while increasing the insulation in the q axis. The proposed design method in this paper is based on determining the analytical equation of the flux lines through a solid rotor. The analytical equation will allow the definition of the optimal curvature of the flux barriers. In a second phase, the width of the flux barriers is determined on the basis of the flux preservation theory in every flux segment. A comparison study using a finite elements simulation will allow us to validate the proposed approach.