Robert Boschgmbh

Robert Bosch Gmbh

Daniel Kuehbacher

Uwe Knappenberger

Patrick Heuser

Felix Bensing

Jochen Reiter

Thomas Heid

Jannik Stammler

Ralph Peter

Michael Schwiderski

Benjamin Gruler

The invention relates to a stator () of an electric machine (), comprising a laminated core () on which stator teeth () and stator grooves () lying between the stator teeth () are formed and which comprises a plurality of laminations (), wherein a single conductor () or a conductor bundle () comprising a plurality of conductors () is provided in each stator groove () in order to form an electric stator winding (), wherein support points () which are mutually spaced in the axial direction are formed in the stator grooves () in order to support the conductor () or conductor bundle () lying in the respective stator groove (), and at least one groove gap () is formed between the walls () of the respective stator groove () and the conductor or conductor bundle () arranged in the stator groove (), said groove gap forming a groove gap channel () which extends in the axial direction and through which a coolant can flow, wherein the support points () are formed by support devices (), each of which comprises one or more support discs () of the laminated core (),

Stator of an electric machine

The invention relates to a stator of an electric machine, comprising:—a laminated stator core (), which has a stator axis (), comprises a plurality of stator teeth () and a plurality of stator slots () formed between the stator teeth (), and is formed by a plurality of stacked stator laminations (); and —electrical conductor elements (), which run through the stator slots () of the laminated stator core () and are provided in order to form an electrical winding, more particularly a plug-in winding. In each of the stator slots (), a slot insulator (), more particularly a slot insulation paper, is provided in order to electrically insulate the conductor elements () from the laminated stator core (). The stator laminations () each have a plurality of lamination teeth () and a lamination yoke (), which connects the lamination teeth (). The stator teeth () of the laminated stator core () are each formed by stacked lamination teeth () of the stator laminations (). The stator is characterized in that, in the laminated stator core (), at least one stator lamination () is provided which is rotated in peripheral direction with respect to the stator axis (), relative to other of the stator laminations () of the laminated stator core (), such that, in each stator slot () of the laminated stator core (), a lamination tooth portion () of one of the lamination teeth () of said stator lamination protrudes into the stator slot ().

A rotor () of an electrical machine is already known, comprising a rotor body () which can be rotated about a rotor axis () and comprising several cooling ducts () which have a cooling duct opening () at each of its ends, wherein one cooling duct opening () of one of the cooling ducts () is arranged radially further outside than the other cooling duct opening () of the same cooling duct (). The driving force for generating an airflow through the cooling ducts () is generated by a radial offset between a channel of a hollow shaft of the rotor and one of the cooling duct openings of the rotor. In the rotor () according to the invention, the driving force for generating the airflow is generated solely in the cooling duct () in question of the rotor (). According to the invention: the first cover element () covers the radially innermost partial cross-section of the cooling duct opening () in question with an edge section which is radially outward with respect to the rotor axis () and in each case leaves a radially outermost partial cross-section of the same cooling duct opening () uncovered as a cooling duct outlet (); the other cooling duct opening () of the same cooling duct () is in each case a cooling duct inlet; an inflow which is axial with respect to the rotor axis () is provided in each case upstream of the cooling duct inlets (); and the geometric centre of gravity of the cooling duct outlet () is in each case offset in the radial direction relative to the rotor axis () with respect to the geometric centre of gravity of the cooling duct inlet () of the same cooling duct ().

Rotor of an electric machine

Growing community of inventors

Stuttgart, Germany

Daniel Kuehbacher