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公开(公告)号：US20220021256A1
公开(公告)日：2022-01-20
申请号：US17297654
申请日：2019-10-15
申请人： Robert Bosch GmbH
摘要： A rotor (1) of an electrical machine is already known, comprising a rotor body (3) which can be rotated about a rotor axis (2) and comprising several cooling ducts (5) which have a cooling duct opening (8.1, 8.2) at each of its ends, wherein one cooling duct opening (8.1) of one of the cooling ducts (5) is arranged radially further outside than the other cooling duct opening (8.2) of the same cooling duct (5). The driving force for generating an airflow through the cooling ducts (5) 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 (1) according to the invention, the driving force for generating the airflow is generated solely in the cooling duct (5) in question of the rotor (1). According to the invention: the first cover element (10) covers the radially innermost partial cross-section of the cooling duct opening (8.1) in question with an edge section which is radially outward with respect to the rotor axis (2) and in each case leaves a radially outermost partial cross-section of the same cooling duct opening (8.1) uncovered as a cooling duct outlet (8.1); the other cooling duct opening (8.2) of the same cooling duct (5) is in each case a cooling duct inlet; an inflow which is axial with respect to the rotor axis (2) is provided in each case upstream of the cooling duct inlets (8.2); and the geometric centre of gravity of the cooling duct outlet (8.1) is in each case offset in the radial direction relative to the rotor axis (2) with respect to the geometric centre of gravity of the cooling duct inlet (8.2) of the same cooling duct (5).
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公开(公告)号：US20240258858A1
公开(公告)日：2024-08-01
申请号：US18291025
申请日：2022-06-08
申请人： Robert Bosch GmbH
摘要： The invention relates to a stator of an electric machine, said stator having a stator axis and a laminated core on which stator teeth and stator grooves are formed and which comprises a plurality of sheet metal laminates. The stator teeth are connected together via a stator yoke, and a conductor bundle comprising a plurality of conductors is arranged in each stator groove in order to form an electric stator winding, wherein each of the stator grooves has a groove base facing the stator yoke and a groove slot facing away from the groove base, and a groove base channel which extends in the axial direction and through which a coolant can flow along at least some sections of a cooling path between a groove inlet and a groove outlet of the respective stator groove is formed between the groove base of the respective stator groove and the conductor bundle arranged in the stator groove.
The invention is characterized in that a groove slot channel (18) extending in the axial direction is formed in the groove slot (5.2) of the respective stator groove (5), said groove slot channel being fluidically connected to the groove base channel (14) of the same stator groove (5) at at least one distributor point (21) via a distributor connection (22) running in the radial direction with respect to the stator axis (2), and the cooling path (15) of the stator groove (5) is formed such that a cooling flow is forced from the groove slot channel (18) into the groove base channel (14) and/or vice versa via the at least one distributor connection (22).-
公开(公告)号：US20240258857A1
公开(公告)日：2024-08-01
申请号：US18291019
申请日：2022-06-08
申请人： Robert Bosch GmbH
发明人： Daniel Kuehbacher , Thomas Heid
摘要： The invention relates to a stator (1) of an electric machine (23), comprising a laminated core (3) on which stator teeth (4) and stator grooves (5) lying between the stator teeth (4) are formed and which comprises a plurality of laminations (6), wherein a single conductor (9) or a conductor bundle (10) comprising a plurality of conductors (9) is provided in each stator groove (5) in order to form an electric stator winding (8), wherein support points (11) which are mutually spaced in the axial direction are formed in the stator grooves (5) in order to support the conductor (9) or conductor bundle (10) lying in the respective stator groove (5), and at least one groove gap (14) is formed between the walls (4.2,5.1) of the respective stator groove (5) and the conductor or conductor bundle (9,10) arranged in the stator groove (5), said groove gap forming a groove gap channel (15) which extends in the axial direction and through which a coolant can flow, wherein the support points (11) are formed by support devices (12), each of which comprises one or more support discs (13) of the laminated core (3),
wherein
the support devices (12) have at least one fluid channel (18) running outside of the stator groove (5) for at least one of the stator grooves (5), in particular all of the stator grooves, said fluid channel forming an inlet (18.1) or outlet (18.2) into or out of the respective groove gap channel (15) of the respective stator groove (5) and/or a bypass (18.3) for bypassing one of the support points (11) of the respective stator groove (5).-
公开(公告)号：US11955846B2
公开(公告)日：2024-04-09
申请号：US17297654
申请日：2019-10-15
申请人： Robert Bosch GmbH
摘要： A rotor (1) of an electrical machine is already known, comprising a rotor body (3) which can be rotated about a rotor axis (2) and comprising several cooling ducts (5) which have a cooling duct opening (8.1, 8.2) at each of its ends, wherein one cooling duct opening (8.1) of one of the cooling ducts (5) is arranged radially further outside than the other cooling duct opening (8.2) of the same cooling duct (5). The driving force for generating an airflow through the cooling ducts (5) 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 (1) according to the invention, the driving force for generating the airflow is generated solely in the cooling duct (5) in question of the rotor (1). According to the invention: the first cover element (10) covers the radially innermost partial cross-section of the cooling duct opening (8.1) in question with an edge section which is radially outward with respect to the rotor axis (2) and in each case leaves a radially outermost partial cross-section of the same cooling duct opening (8.1) uncovered as a cooling duct outlet (8.1); the other cooling duct opening (8.2) of the same cooling duct (5) is in each case a cooling duct inlet; an inflow which is axial with respect to the rotor axis (2) is provided in each case upstream of the cooling duct inlets (8.2); and the geometric centre of gravity of the cooling duct outlet (8.1) is in each case offset in the radial direction relative to the rotor axis (2) with respect to the geometric centre of gravity of the cooling duct inlet (8.2) of the same cooling duct (5).
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公开(公告)号：US20240213839A1
公开(公告)日：2024-06-27
申请号：US18557637
申请日：2022-03-28
申请人： Robert Bosch GmbH
发明人： Bastian Vogt , Daniel Kuehbacher , Daniel Gremmel , Felix Bensing
CPC分类号： H02K3/24 , H02K3/28 , H02K3/345 , H02K9/19 , H02K15/0087
摘要： The invention relates to a stator (1) of an electric machine (23) having a stator axis (2) and having a laminated core (3) on which stator teeth (4) and stator slots (5) located between the stator teeth (4) are formed and which has a large number of laminations (6), wherein the stator teeth (4) are interconnected via an annular stator yoke (7), wherein a single conductor (9) or a conductor bundle (10) comprising a plurality of conductors (9), in particular a stack of flat-wire conductors, is provided in each of the stator slots (5) in order to form an electrical stator winding (8), wherein a plurality of support points (11) which are spaced apart from one another in the axial direction with respect to the stator axis (2) are formed in each of the stator slots (5) in order to clamp the conductor (9) or conductor bundle (10) in each stator slot (5), wherein at least one slot gap (19) is formed between the walls (4.2, 5.1) of each stator slot (5) and the conductor or conductor bundle (9, 10) arranged in the stator slot (5), which slot gap forms a slot gap channel (20) which extends in the axial direction and through which a cooling medium, in particular oil, can flow,
characterized in that
the support points (11) are each formed by twisting individual or a plurality of laminations (6) of the laminated core (3), in particular a group (12) or a plurality of groups (12) of laminations (6).-
公开(公告)号：US20230179036A1
公开(公告)日：2023-06-08
申请号：US17922136
申请日：2021-03-22
申请人： Robert Bosch GmbH
发明人： Daniel Kuehbacher , Felix Bensing
CPC分类号： H02K1/165 , H02K3/12 , H02K3/345 , H02K15/024 , H02K15/085 , H02K15/10
摘要： The invention relates to a stator of an electric machine, comprising: a laminated stator core (3), which has a stator axis (2), comprises a plurality of stator teeth (5) and a plurality of stator slots (6) formed between the stator teeth (5), and is formed by a plurality of stacked stator laminations (4); and - electrical conductor elements (10), which run through the stator slots (6) of the laminated stator core (3) and are provided in order to form an electrical winding, more particularly a plug-in winding. In each of the stator slots (6), a slot insulator (11), more particularly a slot insulation paper, is provided in order to electrically insulate the conductor elements (10) from the laminated stator core (3). The stator laminations (4) each have a plurality of lamination teeth (7) and a lamination yoke (8), which connects the lamination teeth (7). The stator teeth (5) of the laminated stator core (3) are each formed by stacked lamination teeth (7) of the stator laminations (4). The stator is characterized in that, in the laminated stator core (3), at least one stator lamination (4) is provided which is rotated in peripheral direction with respect to the stator axis (2), relative to other of the stator laminations (4) of the laminated stator core (3), such that, in each stator slot (6) of the laminated stator core (3), a lamination tooth portion (12) of one of the lamination teeth (7) of said stator lamination protrudes into the stator slot (6).
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