Rotor of an asynchronous machine
AssigneeSiemens Aktiengesellschaft
InventorsMATTHIAS SCHERER, JOSEF NIEDERMEYER, UWE SCHARF
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Abstract
A rotor of an asynchronous machine with a cage rotor includes a laminated core formed from a plurality of partial laminated cores. The laminated core has substantially axially extending conductors arranged in slots in the laminated core. The conductors include at least two materials of different electrical conductivities, such that a material with a higher electrical conductivity surrounds a material with a lower electrical conductivity by at least 65% in a circumferential direction.
Claims19
-10. (canceled).
A method for producing a rotor of an asynchronous machine with a cage rotor, said method comprising:
- punching and stacking laminations to form a laminated core of plural partial laminated cores having slots and distanced from one another at a predetermined spacing;
- axially aligning the slots of the partial laminated cores;
- axially inserting a hollow pipe of a first electrical conductivity in the aligned slots of the partial laminated cores;
- expanding the hollow pipe by applying high pressure;
- and
- casting-in a material of a second electrical conductivity which is less than the first electrical conductivity to fill the hollow pipe by the material and thereby expand the hollow pipe to establish a positive contact between the hollow pipe and a side wall of the slots and form a conductor and simultaneously end rings on an end face of the laminated core, with at least 65% of the material of the second electrical conductivity being surrounded by a material of the first electrical conductivity in a circumferential direction.
A rotor of an asynchronous machine with a cage rotor, comprising a laminated core formed from a plurality of partial laminated cores, said laminated core having substantially axially extending conductors arranged in slots of the laminated core, said conductors including at least two materials of different electrical conductivities, such that the one of the at least two materials with a higher electrical conductivity surrounds the other one of the at least two materials with a lower electrical conductivity by at least 65% in a circumferential direction.
An asynchronous machine, comprising a rotor, said rotor including a laminated core formed from a plurality of partial laminated cores, said laminated core having substantially axially extending conductors arranged in slots of the laminated core, said conductors including at least two materials of different electrical conductivities, such that the one of the at least two materials with a higher electrical conductivity surrounds the other one of the at least two materials with a lower electrical conductivity by at least 65% in a circumferential direction.
Dependencies are inferred from the claim text.