High-speed sync. motor for traction systems - has axial magnetic flux in gap between permanent magnetic rotor and two stator rings with polyphase windings

摘要

The motor coilless rotor generates magnetic field by permanent magnets so that the magnetic flux permeates the motor air gap in an axial direction. The centrifugal force imparted to the rotor permanent mannets is taken up by a non-magnetic ring outside the magnets. The polyphase stator winding has salient coils with its radial conductors lying in the magnetic field. Ferromagnetic packing is used to improve permeability in the region of the magnetic field.