Stator for an electric machine and method for producing the same
OwnerAndreas Grundl, Bernhard Hoffmanninventors
Life of this patent
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Abstract
An electric machine with a stator which comprises several grooves arranged adjacent to one another and forming winding chambers for accommodating at least one stator winding. Each stator winding is constructed of conductor bars with an essentially rectangular cross-section in the winding chambers and conductor portions forming winding overhangs. The conductor bars are electrically connected in an integral manner at their ends with the conductor portions in that each of the conductor portion comprises an essentially U-shaped end section with two opposite legs whose inner sides facing towards each other are joined with corresponding side faces of a end section of one of the conductor bars.
Claims12
An electric machine with a stator (10) which comprises several grooves (12) arranged adjacent to one another and forming winding chambers for accommodating at least one stator winding (14), with each stator winding (14) being constructed of conductor bars (20) of an essentially rectangular cross-section in the grooves (12) and conductor portions (22) forming winding overhangs, with the conductor bars (20) being electrically connected at their ends with the conductor portions (22) in such a manner that each of the conductor portions (22) comprises an essentially U-shaped end section (30) with two opposite legs (32, 34) whose inner sides (32a, 34a) facing each other are joined with corresponding side faces (26a, 26b) of an end section (26) of one of the conductor bars (20).
A method for manufacturing an electric machine with a stator (10) which comprises several grooves (12) arranged distributed about its circumference and forming winding chambers for accommodating at least one stator winding (14) according to one of the previous claims, with the steps:
- inserting an essentially rectangular conductor bar (20) into a groove (12) so that an end section (26) of the conductor bar (20) protrudes beyond at least one end face of the stator (10),
- integral joining of a conductor portion (22) with the protruding end section (26) of the conductor bar (20), with the conductor portion (22) comprising an essentially U-shaped end section (30) with two opposite legs (32, 34) whose inner sides (32a, 34a) facing each other are joined with corresponding side faces (26a, 26b) of an end section (26) of one of the conductor bars (20).
Dependencies are inferred from the claim text.