Patent ID: 6504281
Filing Date: 2003-01-07
Classification: H02K

Abstract:
A fault tolerant synchronous machine comprising:a stator having a core member and a plurality of phase windings disposed in a plurality of angularly spaced slots in the core member with teeth extending between adjacent slots; a rotor supported for rotation within the stator and spaced therefrom by a gap; and a non-magnetic sleeve within the gap surrounding the rotor and affixed to the stator and having a plurality of slots extending parallel to the axis of the rotor, each slot being angularly positioned to span adjacent teeth defining a slot in the core member; the slots in the sleeve being free of magnetic material to permit magnetic flux from the rotor to pass to selected phase windings in the stator slots without deviation by the presence of magnetic material and to shunt magnetic flux from selected phase windings in the stator slots upon insertion of high permeability magnetic material in corresponding slots in the nonmagnetic sleeve.