Stator of an electric motor

Abstract

Stators are already known which in each case comprise an annular stator stack having grooves which are open towards an axis of the stator and in which an electrical winding is provided which comprises a plurality of winding branches. The plurality of winding branches each have a plurality of parallel wires for reducing the so-called skin effect. The parallel wires are arranged in the grooves, wherein the winding branches in their configuration each form a plurality of turns of a coil which are each part of an electrical coil, wherein a turn of a coil is formed in each case by two sides of a turn, lying in different grooves, of one of the winding branches and by a turn side connector which connects the two sides of a turn to one another. In electrical windings having parallel wires, an unfavourable wire position and a resulting linking of different magnetic flows may lead to disadvantageous compensating or circular currents which produce additional copper losses in the electric motor. In the stator according to the invention the compensating or circular currents in the parallel wires are avoided or at least decreased. According to the invention, the parallel wires (Z) which are arranged in the same groove (2) are in each case provided in a common groove section (yf) of the respective channel (2) having a groove section height (Hf), wherein the groove section (yf) in each case comprises, arranged one above the other in the radial direction, layered regions (y1 . . . yn), wherein in each case the parallel wires ( ) which belong to the same side of a turn arc arranged in the same layered region (y1 . . . yn) of the groove section (yf).

Dependencies are inferred from the claim text.