Patent ID: 6566778
Filing Date: 2003-05-20
Classification: H02K

Abstract:
A cage induction motor for high rotational speeds comprising:a stator for generating a rotating magnetic field; and a rotor disposed to rotate relative to the stator, wherein the rotor comprises a rotor core and rotor conductors, the rotor core is made from a weakly magnetic substance with a high permeability and a relatively low electrical conductivity, the rotor conductors are made of a conducting material with a low permeability and a relatively high electrical conductivity, and the rotor core and rotor conductors are integrated into one body having surfaces that form a smooth uniform cylindrical shape, and the stator comprises a plurality of axially laminated stator sheets and a stator winding, each stator sheet comprises a closed circular inner ring portion and an outer ring portion and slots that penetrate the sheet between the inner and outer ring portions, and the stator winding is housed through the slots.