Study of the mechanical behaviour of a disc type flux switching machine for wind application

This paper focuses on some aspects of the mechanical behaviour of a discoidal switching flux permanent magnet generator in three sections. The first one deals with torque ripple reduction by the identification of the optimal rotor tooth size. The second one focus on the common problem of the rotor's mechanical strength in axial flux machines studying their deflection and optimal design for mass reduction. The third section investigates the machines vibro-acoustic behaviour due to electromagnetic origins. This multi-physic study is based on a weak coupling between two Finite-Element models, a quasi 3D electromagnetic model computing the cogging / electromagnetic torque and the local magnetic forces on the stator teeth faces and a 3D vibro-acoustic model in order to quantify the vibration/noise performances of the studied device.