Squirrel-cage Rotor And Method For Producing Such A Squirrel-cage Rotor

Abstract

Squirrel cage rotor and method for the production thereof including a rotor shaft having a solid rotor portion formed of ferromagnetic material having a plurality of through-passages extending in an axial direction of the rotor shaft, a plurality of electrically conducting bar elements each received in a through-passage so that the respective bar elements extend in the axial direction. The bar elements each have a first longitudinal end and a second longitudinal end, and two electrically conducting end elements which electrically connect the longitudinal ends to form a squirrel cage is formed by the bar elements and end elements. The bar elements are received in the through-passages in such that relative movement in the axial direction between the solid rotor portion and the bar elements is enabled when there is a change in length of the bar elements and / or of the solid rotor portion.

Description

technical field

[0001] The invention relates to a partially short-circuited rotor according to the preamble of claim 1 , also known as a squirrel-cage rotor, and to a method for producing such a short-circuited rotor. Background technique

[0002] Rotors for electric motors that are laminated, ie constructed from a number of individual ferromagnetic plates, are known.

[0003] For use at very high rotational speeds and / or in polluted, corrosive or uncontrolled environments, however, this stacked design may violate physical limits or become completely impermissible.

[0004] The application of a one-piece, solid rotating part or rotor (solid rotor) made of ferromagnetic material can provide the desired solution here, because the structural form has the advantages of mechanical strength, rotor dynamic stability, simple Significant advantages are shown in terms of a substantial reduction of structures and components.

[0005] Different designs of solid rotors are realized and...

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