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

A technology for short-circuiting rotors and rotor shafts, which is applied in the manufacture of squirrel-cage rotors, motor generators, electrical components, etc. The effect of balancing and breaking

Inactive Publication Date: 2014-12-17
MAN ENERGY SOLUTIONS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, during the heating of the short-circuit rotor, since the conductor bars generally consist of a different material than the solid rotor section and thus have different thermal expansion properties, the entire short-circuit rotor can be deformed, which can lead to imbalances or even fractures
[0008] This can lead to a reduction in the service life of the short-circuited rotor and thus to premature failure of the electric motor equipped in this way

Method used

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

Examples

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Embodiment Construction

[0041] as in figure 1 and figure 2 As shown in , a short-circuit rotor 1 (not shown in full) for an electric motor according to the invention has a rotor shaft 10 formed of ferromagnetic material (which has a cylindrical shaft molded thereon in one piece). A solid rotor section 11 in the form of a diameter enlargement (Durchmesservergroesserung), a plurality of electrically conductive rod elements 20 (which have an annular cross-section with a constant diameter) and in the form of two corresponding one-piece end rings Two electrically conductive end elements 30 and 40 .

[0042] The solid rotor section 11 has a plurality of through-channels 12 extending distributed around the circumference of the rotor shaft 11 in the axial direction AR of the rotor shaft 10 .

[0043] A rod element 20 is accommodated in each of the through channels 12 such that the respective rod element 20 extends through the solid rotor section 11 in the axial direction AR of the rotor shaft 10 , wherein...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K15/00H02K17/16
CPCH02K17/165H02K15/0012Y10T29/49012
Inventor G.克利恩汉斯U.劳贝尔P.奥尔特曼R.苏特
Owner MAN ENERGY SOLUTIONS SA
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