Dr. Ing. H.c. F. Porsche Aktiengesellschaft

Robert Boschgmbh

David Bauer

Tobias Engelhardt

Patrick Heuser

Johannes Wende

Josef Dubsky

A rotor of an electrical machine designed as a permanently excited synchronous machine includes a rotor base body having pocket-like recesses and permanent magnets positioned in the pocket-like recesses and poles which, viewed in a circumferential direction, are arranged alternately next to one another and form pole pairs. In a region of each pole, radially inner pocket-like recesses with radially inner permanent magnets arranged therein form a radially inner permanent magnet group and radially outer pocket-like recesses with radially outer permanent magnets arranged therein form a radially outer permanent magnet group. In a region of the respective radially inner and respective radially outer permanent magnet group, a first longitudinal center axis of a permanent magnet accommodated in a respective central pocket-like recess extends perpendicularly to a partly curved line which extends in a radial direction of the rotor and centrally divides the respective pole in the circumferential direction.

Rotor of an electric machine designed as a permanently excited synchronous machine, electric machine and motor vehicle

An electric machine for a vehicle includes: a stator body, the stator body having, in an alternating manner, stator teeth and stator grooves with conductor elements which are arranged therein, and a yoke section with a radially extending yoke height on the stator body radially outside the stator grooves and the stator teeth, the stator body having a stator outer radius. A ratio of the yoke height in relation to the stator outer radius is between 0.20 and 0.28.

Traction engine for a vehicle

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 () are in each case provided in a common groove section (y) of the respective channel () having a groove section height (H), wherein the groove section (y) in each case comprises, arranged one above the other in the radial direction, layered regions (y. . . yn), wherein in each case the parallel wires ( ) which belong to the same side of a turn are arranged in the same layered region (y. . . yn) of the groove section (y).

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Asperg, Germany

David Bauer