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WO2024183999A1 - Stator of an electric machine - Google Patents

Stator of an electric machine Download PDF

Info

Publication number
WO2024183999A1
WO2024183999A1 PCT/EP2024/052985 EP2024052985W WO2024183999A1 WO 2024183999 A1 WO2024183999 A1 WO 2024183999A1 EP 2024052985 W EP2024052985 W EP 2024052985W WO 2024183999 A1 WO2024183999 A1 WO 2024183999A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
slot
yoke
channel
channels
Prior art date
Application number
PCT/EP2024/052985
Other languages
German (de)
French (fr)
Inventor
Felix BENSING
Jannik Stammler
Johannes Riedl
Daniel Kuehbacher
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2024183999A1 publication Critical patent/WO2024183999A1/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors

Definitions

  • the invention is based on a stator of an electrical machine according to the preamble of the main claim.
  • a stator of an electrical machine is already known from DE102019113785 A1, with a stator axis and with a stator laminated core on which stator teeth and stator slots located between the stator teeth are formed and which comprises a stator yoke connecting the stator teeth, wherein the stator slots extend in the radial direction with respect to the stator axis between a slot base and a slot head, wherein a single conductor or a conductor bundle comprising several conductors, in particular a stack of flat wire conductors, is provided in the stator slots to form an electrical stator winding, wherein at least one slot gap is provided between the slot flanks of the respective stator slot and the conductor or conductor bundle arranged in the stator slot, which forms a slot gap channel extending in the axial direction for direct conductor cooling, through which a cooling medium can flow along a slot cooling path.
  • the stator of an electrical machine according to the invention has the advantage that the cooling of the stator is further improved. Furthermore, in addition to the direct conductor cooling, jacket cooling of the stator yoke can be provided. Since the cooling medium is supplied directly through the stator yoke, complex and expensive cooling channels in a stator housing enclosing the stator can be dispensed with. The manufacturing costs are thus reduced. This is achieved according to the invention by
  • Cooling medium supply of at least one slot cooling path opens into at least one of the stator slots
  • the respective supply path opens into a slot inlet of the respective stator slot with a radial channel and comprises at least one yoke channel upstream of the radial channel, which runs in the axial direction in the stator yoke and is intended for cooling the stator yoke
  • several of the yoke channels according to a first embodiment are through-channels that each completely pass through the stator laminated core in the axial direction and each have at least one entrance into the respective radial channel, which is provided in particular in the region of the axial center or in the axial center of the through-channel. In this way, the stator yoke is continuously flowed through in the axial direction, thus achieving uniform cooling of the stator yoke along the axial direction.
  • the yoke channels according to a second embodiment are short channels that run from at least one of the two end faces of the stator laminated core in the axial direction to the entrance into the respective radial channel and are designed to be shorter than a through channel, in particular extending into an axial central region of the stator laminated core.
  • a partial jacket cooling of the stator yoke is achieved, which only encases an axial part of the stator yoke. This first variant is particularly simple and cost-effective to implement.
  • a full jacket cooling of the stator yoke can essentially be achieved, which essentially encases the entire stator yoke.
  • the second variant of the second embodiment requires a cooling medium supply from both end faces of the stator laminated core.
  • yoke channels are provided and distributed over the circumference of the stator yoke, wherein the yoke channels of each pair extend from the same end face of the stator laminated core and are adjacent when viewed in the circumferential direction, wherein one of the yoke channels of each pair is a short channel and the other of the yoke channels is a meander channel, wherein the respective meander channel comprises a through section, a deflection section and a short section, wherein for each pair of yoke channels the short channel and the short section of the meander channel are arranged in pairs opposite one another, in particular in the same circumferential position.
  • stator yoke essentially encases the entire stator yoke, but advantageously only requires a cooling medium supply from one of the two end faces of the stator laminated core.
  • the deflection section of the meander channel according to the third embodiment is formed in the stator laminated core or in a deflection device arranged on the front side of the stator laminated core. This makes it easy to deflect the meander channel.
  • the deflection device can be designed in a ring-shaped or disk-shaped manner, for example, and can include the deflection sections of all meander channels.
  • annular distribution channel is arranged on at least one of the two end faces of the stator laminated core, which opens into the yoke channels and is intended to supply the supply paths with cooling medium.
  • the distribution channel distributes the cooling medium in the circumferential direction to the yoke channels distributed over the circumference. This makes it possible to easily supply the supply paths with cooling medium.
  • two slot cooling paths running in opposite directions are provided in the respective stator slot, which exit as a free jet at the ends of the respective stator slot via a slot outlet, in particular in the slot head or in the slot base. In this way, the cooling path in the stator is simplified with regard to the flow connection of the slot gap channels or the slot cooling paths.
  • the flow connection of the slot gap channels according to the invention enables a lower pressure in the cooling path, so that the requirements for sealing the slot gap channels are reduced.
  • the pressure loss in the respective cooling path is reduced because the respective cooling path does not run over the entire length, but only over an axial section of the respective stator slot.
  • the radial channel of the respective supply path is formed by a punched-out or recess in a single sheet metal lamination of the stator laminated core or by several radial channel sections that are radially offset in several adjacent sheet metal laminations and partially overlap in the radial direction. This allows the radial channel to be created in the stator laminated core in a simple and cost-effective manner.
  • a plurality of support points are formed in the stator slots, spaced apart from one another in the axial direction with respect to the stator axis, for clamping the conductor or conductor bundle located in the respective stator slot, wherein the support points are each formed by twisting individual or multiple laminations of the stator laminated core, in particular a group or multiple groups of laminations.
  • the support points can be produced without special laminations and the conductor bundles can be inserted into the stator slots during assembly without clamping forces. This reduces the manufacturing costs of the stator.
  • damage to the conductor bundles is avoided when inserting the conductor bundles into the respective stator slots.
  • Fig.1 is a side view of a part of the stator according to the invention.
  • Fig.2A is a sectional view of the stator according to the invention according to a first embodiment in a section of the stator along the line ll-ll in Fig.1,
  • FIG.2B several of the yoke channels of the stator according to the invention according to Fig.1 according to the first embodiment according to Fig.2A in a linear development representation
  • Fig.3A is a sectional view of the stator according to the invention according to a second embodiment in a section of the stator along the line ll-ll in Fig.1,
  • FIG.3B several of the yoke channels of the stator according to the invention according to Fig.1 according to the second embodiment according to Fig.3A in a linear development representation
  • FIG.4A several of the yoke channels of the stator according to the invention according to Fig.1 according to a third embodiment in a linear development representation
  • Fig.4B is a first sectional view of the stator according to the invention according to the third embodiment of Fig.4A in a section of the stator along the line IV-IV in Fig.4A,
  • Fig.4C is a second sectional view of the stator according to the invention according to the third embodiment of Fig.4A, with a section of the stator along the line V-V in Fig.4A,
  • Fig.5A an embodiment of a first lamination with channel sections for creating radial channels in the stator lamination stack
  • Fig.5B an embodiment of a second lamination with channel sections for creating radial channels in the stator lamination stack
  • Fig.5C an arrangement of the first and second laminations according to Fig.5A and 5B for producing the radial channels in the stator lamination stack
  • Fig.6 a groove cross-section along the line Vl-Vl in Fig.2A
  • Fig.7 a groove cross-section along the line Vll-Vll in Fig.2A
  • Fig.8 a groove cross-section along the line VIII-VIII in Fig.2A
  • Fig.9 shows in section one of the stator slots of the stator according to the invention with a conductor bundle supported at several support points and
  • Fig.10 is a partial view of the stator according to the invention with twisted lamellae for producing support points for the conductor bundles.
  • Fig.1 shows a side view of a part of the stator according to the invention.
  • the stator 1 of an electrical machine 2 has a stator axis 3 and has a stator laminated core 4 on which stator teeth 5 and stator slots 6 located between the stator teeth 5 are formed and which comprises a stator yoke 7 connecting the stator teeth 5.
  • the stator slots 6 extend in the radial direction with respect to the stator axis 3 between a slot base 6g and a slot head 6h and can each have a slot slot 6s in the slot head 6h.
  • each of the stator slots 6 a single electrical conductor 8 or a conductor bundle 9 comprising several conductors 8, in particular a stack of flat wire conductors, is provided to form an electrical stator winding 10.
  • At least one slot gap 12 is provided, which forms a slot gap channel 13 extending in the axial direction with respect to the stator axis 3, through which a cooling medium can flow along a slot cooling path 14.
  • Fig.2A shows a sectional view of the stator according to the invention according to a first embodiment in a section of the stator along the line II-II in Fig.1.
  • the stator laminated core 4 is formed by a stack of laminated laminations 16.
  • stator slots 6 In the respective stator slot 6, two slot cooling paths 14 running in opposite directions are provided, which exit at the ends of the respective stator slot 6 via a slot outlet 14.2 as a free jet, in particular in the slot head 6h or in the slot base 6g.
  • the stator slots 6 can be closed by means of at least one slot closure 19 to seal the slot cooling paths 14.
  • the slot closure can be produced, for example, according to Fig.1 and Fig.6 to Fig.8, by designing a single sleeve- or tubular slot closure as a separate element for closing all slot slots 6s.
  • a strip-shaped slot closure in particular a cover slide, can be provided as a separate element in each slot slot 6s.
  • the slot closures 19 can each be formed by tooth head bridges that are part of the sheet metal laminations 16, connect tooth heads of adjacent stator teeth 5 and in particular have a reduced magnetic conductivity.
  • At least one supply path 15 is formed in the stator laminated core 4, which opens into at least one of the stator slots 6 in order to supply cooling medium to at least one slot cooling path 14.
  • the respective supply path 15 opens into a slot inlet 14.1 of the respective stator slot 6 with a radial channel 15.1 running in the radial direction and comprises at least one yoke channel 15.2 upstream of the radial channel 15.1, which runs in the axial direction in the stator yoke 7 and is provided for cooling the stator yoke 7.
  • Fig.2B shows several of the yoke channels of the stator according to the invention according to Fig.1 according to the first embodiment according to Fig.2A in a linear development representation.
  • yoke channels 15.2 of the at least one supply path 15 are distributed over the circumference of the stator yoke 7 and in this way form a jacket cooling in the stator yoke 7.
  • several of the yoke channels 15.2 are designed as through-channels 23, which each pass completely through the stator laminated core 4 in the axial direction and each have at least one inlet 17 in the respective radial channel 15.1.
  • the inlet 17 is provided, for example, in the region of the axial center of the through-channel 23, in particular in the axial center.
  • An annular distribution channel 20 can be arranged on each of the two end faces of the stator laminated core 4, which opens into the respective yoke channels 15.2 and is provided for supplying the supply paths 15 with cooling medium.
  • Fig.3A shows a sectional view of the stator according to the invention according to a second embodiment in a section of the stator along the line II-II in Fig.1.
  • Fig.3B shows several of the yoke channels of the stator according to the invention according to Fig.1 according to the second embodiment according to Fig.3A in a linear development representation.
  • several of the yoke channels 15.2 are designed as short channels 24, which extend from at least one of the two end faces of the stator laminated core 4 in the axial direction to the entrance into the respective radial channel and are shorter than a through-channel 23, in particular extending into an axial central region of the stator laminated core 4.
  • only short channels 24 can be provided, which run exclusively from one of the two end faces of the stator laminated core 4 and thereby achieve partial jacket cooling that only encases an axial part of the stator yoke 7.
  • short channels 24 can also be provided, which run from both end faces of the stator laminated core 4. This second variant achieves full jacket cooling that essentially encases the entire stator yoke 7.
  • an annular distribution channel 20 can be provided on both end faces of the stator laminated core 4, which opens into the respective yoke channels 15.2 and is intended to supply the supply paths 15 with cooling medium.
  • Fig.4A shows several of the yoke channels of the stator according to the invention according to Fig.1 according to a third embodiment in a linear development representation.
  • Fig.4B shows a first sectional view of the stator according to the invention according to the third embodiment according to Fig.4A with a section of the stator along the line
  • Fig.4C shows a second sectional view of the stator according to the invention according to the third embodiment according to Fig.4A with a section of the stator along the line
  • yoke channels 15.2 of different lengths are provided and distributed over the circumference of the stator yoke 7.
  • the yoke channels 15.2 of each pair 15.2p run from the same end face of the stator laminated core 4 and are adjacent to one another in the circumferential direction, wherein one of the yoke channels 15.2 of each pair 15.2p is a short channel 24 and the other of the yoke channels 15.2 of the same pair 15.2p is a meander channel 25, which comprises a through section 25.1, a deflection section 25.2 and a short section 25.3.
  • an annular distribution channel 20 can be arranged, which opens into the respective yoke channels 15.2 and is intended for supplying the supply paths 15 with cooling medium.
  • the short channel 24 and the short section 25.3 of the meander channel 25 are arranged in pairs opposite one another, in particular in the same circumferential position.
  • the third embodiment achieves a full jacket cooling which essentially encases the entire stator yoke 7.
  • the deflection sections 25.2 of the meander channels 25 can be formed according to Fig. 4A in a deflection device 26 arranged on the front side of the stator laminated core 4 or in a manner not shown in the stator laminated core 4.
  • the deflection device 26 can, for example, be ring-shaped or disk-shaped and comprise the deflection sections of all meander channels.
  • Fig.5A shows an embodiment of a first lamination with channel sections for creating radial channels in the stator lamination stack.
  • Fig.5B shows an embodiment of a second lamination with channel sections for creating radial channels in the stator lamination stack.
  • Fig.5C shows an arrangement of the first and second laminations according to Fig.5A and 5B for producing the radial channels in the stator laminated core.
  • the radial channel 15.1 of the respective supply path 15 can be formed in various ways. According to Fig. 5A to 5C, it can be formed by several radial channel sections 18, which are radially offset in several adjacent sheet metal laminations 16 and partially overlap in the radial direction. Alternatively, the radial channel 15.1 can also be created, for example, by a punched-out or recess in a single sheet metal lamination 16 of the stator laminated core 4.
  • Fig.6 shows a groove cross-section along the line VI-VI in Fig.2A
  • Fig.7 shows a groove cross-section along the line VII-VIII in Fig.2A
  • Fig.8 shows a groove cross-section along the line VIII-VIII in Fig.2A.
  • Fig.9 shows a partial view of the stator according to the invention with twisted lamellae for producing support points for the conductor bundles.
  • the support points 11 can each be formed by twisting individual or multiple laminations 16 of the stator laminated core 4, in particular by a group or multiple groups 28 of laminations 16.
  • the twisted laminations 16 are twisted around the stator axis 3 relative to the other laminations 16 of the stator laminated core 4 (in the opposite direction), for example by a specific angle of twist ⁇
  • the respective support point 11 is formed, for example, by two groups 28 of laminations 16 which are twisted around the stator axis 3 in the opposite direction by the specific angle of twist t
  • the respective groove cooling path 14 is at least narrowed at the support points 11. Therefore, a bypass 21 is provided at each support point 11 in order to guide the cooling medium past the respective narrowed support point 11.
  • the bypasses 21 of the respective stator groove 6 are formed starting from the respective groove inlet 14.1 along the respective groove cooling path 14, for example alternately in the groove base 6g or in the groove head 6h (Fig. 2A, Fig. 6 and Fig. 8), whereby a meandering course of the groove cooling paths 14 can be achieved.
  • the respective bypass 21 in the groove base 6g can be formed according to Fig.6, for example, by one or two recesses in the groove flanks 6f at the foot of the stator teeth 5 or a recess in the groove base 6g.
  • the respective slot closure 19 has, for the respective stator slot 6 according to Fig.2A, Fig.6 and Fig.8, a plurality of blockings 22 spaced apart from one another in the axial direction for adjusting the meandering slot cooling path 14.
  • the blockings 22 extend in particular up to or close to the conductor 8 or the conductor bundle 9.
  • a passage running in the axial direction is provided as a bypass 21 for the respective slot cooling path.
  • Fig.6 and Fig.7 show one of the blockages 22 of the respective slot closure 19.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

The invention relates to a stator of an electric machine (2) having a stator axis (3) and having a stator laminated core (4) on which stator teeth (5) and stator slots (6), lying between the stator teeth (5), are formed, wherein in each of the stator slots (6) a single conductor (8) or a conductor bundle (9) comprising a plurality of conductors (8) is provided for forming an electric stator winding (10), wherein between the slot flanks (6f) of the respective stator slot (6) and the conductor (8) or conductor bundle (9) arranged in the stator slot (6) at least one slot gap (12) is provided which forms a slot gap channel (13) which extends in the axial direction and can be flowed through by a cooling medium along a slot cooling path (14), characterised in that - in the stator laminated core (4) at least one supply path (15) is formed which in each case opens into at least one of the stator slots (6) to supply cooling medium to at least one slot cooling path (14), - a radial channel (15.1) of the respective supply path (15) opens into a slot inlet (14.1) of the respective stator slot (6) and upstream of the radial channel (15.1) comprises at least one yoke channel (15.2) which extends in the stator yoke (7) in the axial direction and is provided to cool the stator yoke (7).

Description

Beschreibung Description
Titel Title
Stator einer elektrischen Maschine Stator of an electrical machine
Stand der Technik State of the art
Die Erfindung geht aus von einem Stator einer elektrischen Maschine nach der Gattung des Hauptanspruchs. The invention is based on a stator of an electrical machine according to the preamble of the main claim.
Es ist schon ein Stator einer elektrischen Maschine aus der DE102019113785 A1 bekannt, mit einer Statorachse und mit einem Statorblechpaket, an dem Statorzähne und zwischen den Statorzähnen liegende Statornuten ausgebildet sind und das ein die Statorzähne verbindendes Statorjoch umfasst, wobei sich die Statornuten in radialer Richtung bezüglich der Statorachse jeweils zwischen einem Nutgrund und einem Nutkopf erstrecken, wobei in den Statornuten jeweils ein einziger Leiter oder ein mehrere Leiter umfassendes Leiterbündel, insbesondere ein Stapel von Flachdrahtleitern, zur Bildung einer elektrischen Statorwicklung vorgesehen ist, wobei zwischen den Nutflanken der jeweiligen Statornut und dem in der Statornut angeordneten Leiter bzw. Leiterbündel zumindest ein Nutspalt vorgesehen ist, der einen sich in axialer Richtung erstreckenden Nutspaltkanal zur Leiterdirektkühlung bildet, der entlang eines Nut-Kühlpfads von einem Kühlmedium durchströmbar ist. A stator of an electrical machine is already known from DE102019113785 A1, with a stator axis and with a stator laminated core on which stator teeth and stator slots located between the stator teeth are formed and which comprises a stator yoke connecting the stator teeth, wherein the stator slots extend in the radial direction with respect to the stator axis between a slot base and a slot head, wherein a single conductor or a conductor bundle comprising several conductors, in particular a stack of flat wire conductors, is provided in the stator slots to form an electrical stator winding, wherein at least one slot gap is provided between the slot flanks of the respective stator slot and the conductor or conductor bundle arranged in the stator slot, which forms a slot gap channel extending in the axial direction for direct conductor cooling, through which a cooling medium can flow along a slot cooling path.
Vorteile der Erfindung Advantages of the invention
Der erfindungsgemäße Stator einer elektrischen Maschine mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, dass die Kühlung des Stators weiter verbessert wird. Weiterhin kann zusätzlich zur Leiterdirektkühlung eine Mantelkühlung des Statorjochs bereitgestellt werden. Da das Kühlmedium direkt durch das Statorjoch zugeführt wird, können aufwendig und teuer herzustellende Kühlkanäle in einem den Stator umschließenden Statorgehäuse entfallen. Die Herstellungskosten werden dadurch verringert. Dies wird erfindungsgemäß erreicht, indem The stator of an electrical machine according to the invention with the characterizing features of the main claim has the advantage that the cooling of the stator is further improved. Furthermore, in addition to the direct conductor cooling, jacket cooling of the stator yoke can be provided. Since the cooling medium is supplied directly through the stator yoke, complex and expensive cooling channels in a stator housing enclosing the stator can be dispensed with. The manufacturing costs are thus reduced. This is achieved according to the invention by
- im Statorblechpaket zumindest ein Versorgungspfad ausgebildet ist, der zur- at least one supply path is formed in the stator core, which
Kühlmedium-Versorgung zumindest eines Nut-Kühlpfads jeweils in zumindest eine der Statornuten mündet, Cooling medium supply of at least one slot cooling path opens into at least one of the stator slots,
- der jeweilige Versorgungspfad mit einem Radialkanal in einen Nut-Zulauf der jeweiligen Statornut mündet und stromauf des Radialkanals zumindest einen Jochkanal umfasst, der in axialer Richtung im Statorjoch verläuft und zur Kühlung des Statorjochs vorgesehen ist - the respective supply path opens into a slot inlet of the respective stator slot with a radial channel and comprises at least one yoke channel upstream of the radial channel, which runs in the axial direction in the stator yoke and is intended for cooling the stator yoke
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen Stators einer elektrischen Maschine möglich. The measures listed in the subclaims enable advantageous further developments and improvements of the stator of an electrical machine specified in the main claim.
Besonders vorteilhaft ist, wenn mehrere Jochkanäle des zumindest einen Versorgungspfades über den Umfang des Statorjochs verteilt sind und eine Mantelkühlung des Statorjochs bilden. Auf diese Weise wird eine gleichmäßige Kühlung des Statorjochs über den Umfang des Statorjochs erreicht. It is particularly advantageous if several yoke channels of the at least one supply path are distributed over the circumference of the stator yoke and form a jacket cooling of the stator yoke. In this way, uniform cooling of the stator yoke is achieved over the circumference of the stator yoke.
Weiterhin vorteilhaft ist, wenn mehrere der Jochkanäle nach einem ersten Ausführungsbeispiel Durchgangskanäle sind, die das Statorblechpaket in axialer Richtung jeweils vollständig durchlaufen und jeweils zumindest einen Eingang in den jeweiligen Radialkanal aufweisen, der insbesondere im Bereich der axialen Mitte oder in der axialen Mitte des Durchgangskanals vorgesehen ist. Auf diese Weise wird das Statorjoch in axialer Richtung durchgängig durchströmt und somit eine gleichmäßige Kühlung des Statorjochs entlang der axialen Richtung erreicht. It is also advantageous if several of the yoke channels according to a first embodiment are through-channels that each completely pass through the stator laminated core in the axial direction and each have at least one entrance into the respective radial channel, which is provided in particular in the region of the axial center or in the axial center of the through-channel. In this way, the stator yoke is continuously flowed through in the axial direction, thus achieving uniform cooling of the stator yoke along the axial direction.
Sehr vorteilhaft ist es, wenn mehrere der Jochkanäle nach einem zweiten Ausführungsbeispiel Kurzkanäle sind, die von zumindest einer der beiden Stirnseiten des Statorblechpakets ausgehend in axialer Richtung bis zum Eingang in den jeweiligen Radialkanal verlaufen und kürzer als ein Durchgangskanal ausgebildet sind, insbesondere bis in einen axialen Zentralbereich des Statorblechpakets reichen. Bei einer ersten Variante des zweiten Ausführungsbeispiels, bei der nur Kurzkanäle vorgesehen sind, die ausschließlich von einer der beiden Stirnseiten des Statorblechpakets ausgehend verlaufen, wird eine Teilmantelkühlung des Statorjochs erreicht, die nur einen axialen Teil des Statorjochs ummantelt. Diese erste Variante ist besonders einfach und kostengünstig realisierbar. Bei einer zweiten Variante des zweiten Ausführungsbeispiels, bei der Kurzkanäle vorgesehen sind, die von beiden Stirnseiten des Statorblechpakets ausgehend verlaufen, kann im wesentlichen eine Vollmantelkühlung des Statorjochs erreicht werden, die im wesentlichen das gesamte Statorjoch ummantelt. Allerdings erfordert die zweite Variante des zweiten Ausführungsbeispiels eine Kühlmedium-Versorgung von beiden Stirnseiten des Statorblechpakets. It is very advantageous if several of the yoke channels according to a second embodiment are short channels that run from at least one of the two end faces of the stator laminated core in the axial direction to the entrance into the respective radial channel and are designed to be shorter than a through channel, in particular extending into an axial central region of the stator laminated core. In a first variant of the second embodiment, in which only short channels are provided that run exclusively from one of the two end faces of the stator laminated core, a partial jacket cooling of the stator yoke is achieved, which only encases an axial part of the stator yoke. This first variant is particularly simple and cost-effective to implement. In a second variant of the second embodiment, in which short channels are provided that extend from both end faces of the stator laminated core, a full jacket cooling of the stator yoke can essentially be achieved, which essentially encases the entire stator yoke. However, the second variant of the second embodiment requires a cooling medium supply from both end faces of the stator laminated core.
Auch vorteilhaft ist, wenn nach einem dritten Ausführungsbeispiel mehrere Paare von Jochkanälen vorgesehen und über den Umfang des Statorjochs verteilt sind, wobei die Jochkanäle jedes Paares von derselben Stirnseite des Statorblechpakets ausgehend verlaufen und in Umfangsrichtung gesehen benachbart sind, wobei einer der Jochkanäle jedes Paares ein Kurzkanal und der andere der Jochkanäle ein Mäanderkanal ist, wobei der jeweilige Mäanderkanal einen Durchgangsabschnitt, einen Umlenkungsabschnitt und einen Kurzabschnitt umfasst, wobei für jedes Paar von Jochkanälen der Kurzkanal und der Kurzabschnitt des Mäanderkanals paarweise gegenüberliegend angeordnet sind, insbesondere in der gleichen Umfangsposition.It is also advantageous if, according to a third embodiment, several pairs of yoke channels are provided and distributed over the circumference of the stator yoke, wherein the yoke channels of each pair extend from the same end face of the stator laminated core and are adjacent when viewed in the circumferential direction, wherein one of the yoke channels of each pair is a short channel and the other of the yoke channels is a meander channel, wherein the respective meander channel comprises a through section, a deflection section and a short section, wherein for each pair of yoke channels the short channel and the short section of the meander channel are arranged in pairs opposite one another, in particular in the same circumferential position.
Auf diese Weise wird im wesentlichen eine Vollmantelkühlung des Statorjochs erreicht, die im wesentlichen das gesamte Statorjoch ummantelt, aber vorteilhafterweise nur eine Kühlmedium-Versorgung von einer der beiden Stirnseiten des Statorblechpakets erfordert. In this way, a full-jacket cooling of the stator yoke is essentially achieved, which essentially encases the entire stator yoke, but advantageously only requires a cooling medium supply from one of the two end faces of the stator laminated core.
Desweiteren vorteilhaft ist, wenn der Umlenkungsabschnitt des Mäanderkanals gemäß dem dritten Ausführungsbeispiel im Statorblechpaket oder in einer stirnseitig am Statorblechpaket angeordneten Umlenkeinrichtung ausgebildet ist. Dadurch kann die Umlenkung des Mäanderkanals auf einfache Weise erreicht werden. Die Umlenkeinrichtung kann beispielsweise ringförmig oder scheibenförmig ausgebildet sein und die Umlenkungsabschnitte aller Mäanderkanäle umfassen. It is also advantageous if the deflection section of the meander channel according to the third embodiment is formed in the stator laminated core or in a deflection device arranged on the front side of the stator laminated core. This makes it easy to deflect the meander channel. The deflection device can be designed in a ring-shaped or disk-shaped manner, for example, and can include the deflection sections of all meander channels.
Darüber hinaus vorteilhaft ist, wenn zumindest an einer der beiden Stirnseiten des Statorblechpakets ein ringförmiger Verteilerkanal angeordnet ist, der in die Jochkanäle mündet und zur Kühlmedium-Versorgung der Versorgungspfade vorgesehen ist. Der Verteilerkanal verteilt das Kühlmedium in Umfangsrichtung auf die über den Umfang verteilten Jochkanäle. Dadurch kann eine einfache Kühlmedium-Versorgung der Versorgungspfade erreicht werden. Vorteilhaft ist, wenn in der jeweiligen Statornut zwei in entgegengesetzte Richtung verlaufende Nut-Kühlpfade vorgesehen sind, die an den Enden der jeweiligen Statornut über einen Nut-Ablauf als Freistrahl austreten, insbesondere im Nutkopf oder im Nutgrund. Auf diese Weise wird der Kühlpfad im Stator vereinfacht hinsichtlich der Strömungsanbindung der Nutspaltkanäle bzw. der Nut-Kühlpfade. Insbesondere ist an den Stirnseiten des Statorblechpakets kein Ringsammler zum Sammeln des aus den Nutspaltkanälen austretenden Kühlmediums erforderlich, welcher eine Abdichtung eines Statorraums gegenüber einem Rotorraum der elektrischen Maschine, beispielsweise mittels einer Hülse oder eines Spaltrohres, erfordern würde. Weiterhin ermöglicht die erfindungsgemäße Strömungsanbindung der Nutspaltkanäle einen geringeren Druck im Kühlpfad, so dass die Anforderungen an die Abdichtung der Nutspaltkanäle verringert werden. Darüber hinaus wird der Druckverlust im jeweiligen Kühlpfad verringert, da der jeweilige Kühlpfad nicht über die gesamte Länge, sondern nur über eine axiale Teilstrecke der jeweiligen Statornut verläuft. It is also advantageous if an annular distribution channel is arranged on at least one of the two end faces of the stator laminated core, which opens into the yoke channels and is intended to supply the supply paths with cooling medium. The distribution channel distributes the cooling medium in the circumferential direction to the yoke channels distributed over the circumference. This makes it possible to easily supply the supply paths with cooling medium. It is advantageous if two slot cooling paths running in opposite directions are provided in the respective stator slot, which exit as a free jet at the ends of the respective stator slot via a slot outlet, in particular in the slot head or in the slot base. In this way, the cooling path in the stator is simplified with regard to the flow connection of the slot gap channels or the slot cooling paths. In particular, no ring collector is required on the front sides of the stator laminated core to collect the cooling medium exiting from the slot gap channels, which would require a stator chamber to be sealed against a rotor chamber of the electrical machine, for example by means of a sleeve or a gap tube. Furthermore, the flow connection of the slot gap channels according to the invention enables a lower pressure in the cooling path, so that the requirements for sealing the slot gap channels are reduced. In addition, the pressure loss in the respective cooling path is reduced because the respective cooling path does not run over the entire length, but only over an axial section of the respective stator slot.
Nach einer vorteilhaften Ausgestaltung ist der Radialkanal des jeweiligen Versorgungspfades durch eine Ausstanzung oder Vertiefung in einer einzigen Blechlamelle des Statorblechpaketes oder durch mehrere radiale Kanalabschnitte gebildet ist, die radial versetzt in mehreren benachbarten Blechlamellen ausgeführt sind und in radialer Richtung teilweise überlappen. Dadurch kann der Radialkanal auf einfache und kostengünstige Weise im Statorblechpaket erzeugt werden. According to an advantageous embodiment, the radial channel of the respective supply path is formed by a punched-out or recess in a single sheet metal lamination of the stator laminated core or by several radial channel sections that are radially offset in several adjacent sheet metal laminations and partially overlap in the radial direction. This allows the radial channel to be created in the stator laminated core in a simple and cost-effective manner.
Weiter vorteilhaft ist, wenn in den Statornuten jeweils mehrere, in axialer Richtung bezüglich der Statorachse voneinander beabstandete Stützstellen zur Einklemmung des in der jeweiligen Statornut liegenden Leiters bzw. Leiterbündels gebildet sind, wobei die Stützstellen jeweils durch das Verdrehen von einzelnen oder mehreren Blechlamellen des Statorblechpakets, insbesondere von einer Gruppe oder von mehreren Gruppen von Blechlamellen, gebildet sind. Auf diese Weise sind die Stützstellen ohne Sonderlamellen erzeugbar und die Leiterbündel bei der Montage ohne Klemmkräfte in die Statornuten einführbar. Dadurch werden die Herstellungskosten des Stators verringert. Außerdem werden Beschädigungen der Leiterbündel beim Einführen der Leiterbündel in die jeweiligen Statornuten vermieden. Zeichnung It is also advantageous if a plurality of support points are formed in the stator slots, spaced apart from one another in the axial direction with respect to the stator axis, for clamping the conductor or conductor bundle located in the respective stator slot, wherein the support points are each formed by twisting individual or multiple laminations of the stator laminated core, in particular a group or multiple groups of laminations. In this way, the support points can be produced without special laminations and the conductor bundles can be inserted into the stator slots during assembly without clamping forces. This reduces the manufacturing costs of the stator. In addition, damage to the conductor bundles is avoided when inserting the conductor bundles into the respective stator slots. drawing
Mehrere Ausführungsbeispiel der Erfindung sind in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Several embodiments of the invention are shown in simplified form in the drawing and explained in more detail in the following description.
Es zeigen: They show:
Fig.1 eine Seitenansicht eines Teils des erfindungsgemäßen Stators, Fig.1 is a side view of a part of the stator according to the invention,
Fig.2A eine Schnittansicht des erfindungsgemäßen Stators gemäß einem ersten Ausführungsbeispiel bei einem Schnitt des Stators entlang der Linie ll-ll in Fig.1 , Fig.2A is a sectional view of the stator according to the invention according to a first embodiment in a section of the stator along the line ll-ll in Fig.1,
Fig.2B mehrere der Jochkanäle des erfindungsgemäßen Stators nach Fig.1 gemäß dem ersten Ausführungsbeispiel nach Fig.2A in einer linearen Abwicklungs- Darstellung, Fig.2B several of the yoke channels of the stator according to the invention according to Fig.1 according to the first embodiment according to Fig.2A in a linear development representation,
Fig.3A eine Schnittansicht des erfindungsgemäßen Stators gemäß einem zweiten Ausführungsbeispiel bei einem Schnitt des Stators entlang der Linie ll-ll in Fig.1 , Fig.3A is a sectional view of the stator according to the invention according to a second embodiment in a section of the stator along the line ll-ll in Fig.1,
Fig.3B mehrere der Jochkanäle des erfindungsgemäßen Stators nach Fig.1 gemäß dem zweiten Ausführungsbeispiel nach Fig.3A in einer linearen Abwicklungs- Darstellung, Fig.3B several of the yoke channels of the stator according to the invention according to Fig.1 according to the second embodiment according to Fig.3A in a linear development representation,
Fig.4A mehrere der Jochkanäle des erfindungsgemäßen Stators nach Fig.1 gemäß einem dritten Ausführungsbeispiel in einer linearen Abwicklungs-Darstellung,Fig.4A several of the yoke channels of the stator according to the invention according to Fig.1 according to a third embodiment in a linear development representation,
Fig.4B eine erste Schnittansicht des erfindungsgemäßen Stators gemäß dem dritten Ausführungsbeispiel nach Fig.4A bei einem Schnitt des Stators entlang der Linie IV-IV in Fig.4A, Fig.4B is a first sectional view of the stator according to the invention according to the third embodiment of Fig.4A in a section of the stator along the line IV-IV in Fig.4A,
Fig.4C eine zweite Schnittansicht des erfindungsgemäßen Stators gemäß dem dritten Ausführungsbeispiel nach Fig.4A bei einem Schnitt des Stators entlang der Linie V-V in Fig.4A, Fig.4C is a second sectional view of the stator according to the invention according to the third embodiment of Fig.4A, with a section of the stator along the line V-V in Fig.4A,
Fig.5A eine Ausführung einer ersten Blechlamelle mit Kanalabschnitten zur Erzeugung von Radialkanälen im Statorblechpaket, Fig.5A an embodiment of a first lamination with channel sections for creating radial channels in the stator lamination stack,
Fig.5B eine Ausführung einer zweiten Blechlamelle mit Kanalabschnitten zur Erzeugung von Radialkanälen im Statorblechpaket, Fig.5B an embodiment of a second lamination with channel sections for creating radial channels in the stator lamination stack,
Fig.5C eine Anordnung der ersten und zweiten Blechlamelle nach Fig.5A und 5B zur Erzeugung der Radialkanäle im Statorblechpaket, Fig.5C an arrangement of the first and second laminations according to Fig.5A and 5B for producing the radial channels in the stator lamination stack,
Fig.6 einen Nutquerschnitt entlang der Linie Vl-Vl in Fig.2A, Fig.7 einen Nutquerschnitt entlang der Linie Vll-Vll in Fig.2A, Fig.6 a groove cross-section along the line Vl-Vl in Fig.2A, Fig.7 a groove cross-section along the line Vll-Vll in Fig.2A,
Fig.8 einen Nutquerschnitt entlang der Linie Vlll-Vlll in Fig.2A, Fig.8 a groove cross-section along the line VIII-VIII in Fig.2A,
Fig.9 im Schnitt eine der Statornuten des erfindungsgemäßen Stators mit einem an mehreren Stützstellen gelagerten Leiterbündel und Fig.9 shows in section one of the stator slots of the stator according to the invention with a conductor bundle supported at several support points and
Fig.10 eine Teilansicht des erfindungsgemäßen Stators mit verdrehten Lamellen zur Erzeugung von Stützstellen für die Leiterbündel. Fig.10 is a partial view of the stator according to the invention with twisted lamellae for producing support points for the conductor bundles.
Beschreibung der Ausführungsbeispiele Description of the embodiments
Fig.1 zeigt eine Seitenansicht eines Teils des erfindungsgemäßen Stators. Fig.1 shows a side view of a part of the stator according to the invention.
Der erfindungsgemäße Stator 1 einer elektrischen Maschine 2 hat eine Statorachse 3 und weist ein Statorblechpaket 4 auf, an dem Statorzähne 5 und zwischen den Statorzähnen 5 liegende Statornuten 6 ausgebildet sind und das ein die Statorzähne 5 verbindendes Statorjoch 7 umfasst. Die Statornuten 6 erstrecken sich in radialer Richtung bezüglich der Statorachse 3 jeweils zwischen einem Nutgrund 6g und einem Nutkopf 6h und können im Nutkopf 6h jeweils einen Nutschlitz 6s aufweisen. The stator 1 of an electrical machine 2 according to the invention has a stator axis 3 and has a stator laminated core 4 on which stator teeth 5 and stator slots 6 located between the stator teeth 5 are formed and which comprises a stator yoke 7 connecting the stator teeth 5. The stator slots 6 extend in the radial direction with respect to the stator axis 3 between a slot base 6g and a slot head 6h and can each have a slot slot 6s in the slot head 6h.
In den Statornuten 6 ist jeweils ein einziger elektrischer Leiter 8 oder ein mehrere Leiter 8 umfassendes Leiterbündel 9, insbesondere ein Stapel von Flachdrahtleitern, zur Bildung einer elektrischen Statorwicklung 10 vorgesehen. In each of the stator slots 6, a single electrical conductor 8 or a conductor bundle 9 comprising several conductors 8, in particular a stack of flat wire conductors, is provided to form an electrical stator winding 10.
Zwischen den Nutflanken 6f der jeweiligen Statornut 6 und dem in der Statornut 6 angeordneten Leiter 8 bzw. Leiterbündel 9 ist zumindest ein Nutspalt 12 vorgesehen, der einen sich in axialer Richtung bezüglich der Statorachse 3 erstreckenden Nutspaltkanal 13 bildet, der entlang eines Nut-Kühlpfads 14 von einem Kühlmedium durchströmbar ist. Between the slot flanks 6f of the respective stator slot 6 and the conductor 8 or conductor bundle 9 arranged in the stator slot 6, at least one slot gap 12 is provided, which forms a slot gap channel 13 extending in the axial direction with respect to the stator axis 3, through which a cooling medium can flow along a slot cooling path 14.
Fig.2A zeigt eine Schnittansicht des erfindungsgemäßen Stators gemäß einem ersten Ausführungsbeispiel bei einem Schnitt des Stators entlang der Linie ll-ll in Fig.1. Fig.2A shows a sectional view of the stator according to the invention according to a first embodiment in a section of the stator along the line II-II in Fig.1.
Das Statorblechpaket 4 ist durch einen Stapel von Blechlamellen 16 gebildet. The stator laminated core 4 is formed by a stack of laminated laminations 16.
In der jeweiligen Statornut 6 sind zwei in entgegengesetzte Richtung verlaufende Nut- Kühlpfade 14 vorgesehen, die an den Enden der jeweiligen Statornut 6 über einen Nut- Ablauf 14.2 als Freistrahl austreten, insbesondere im Nutkopf 6h oder im Nutgrund 6g. Die Statornuten 6 können zur Abdichtung der Nut-Kühlpfade 14 mittels zumindest eines Nutverschlusses 19 verschlossen sein. Der Nutverschluss kann beispielsweise nach Fig.1 sowie Fig.6 bis Fig. 8 erzeugt werden, indem ein einziger hülsen- oder rohrförmiger Nutverschluss als separates Element zum Verschließen aller Nutschlitze 6s ausgeführt ist. Nach einer nicht dargestellten zweiten Variante kann in jedem Nutschlitz 6s ein streifenförmiger Nutverschluss, insbesondere ein Deckschieber, als separates Element vorgesehen sein. Nach einer nicht dargestellten dritten Variante können die Nutverschlüsse 19 jeweils durch Zahnkopfbrücken gebildet sein, die Teil der Blechlamellen 16 sind, Zahnköpfe von benachbarten Statorzähnen 5 verbinden und insbesondere eine verringerte magnetische Leitfähigkeit aufweisen. In the respective stator slot 6, two slot cooling paths 14 running in opposite directions are provided, which exit at the ends of the respective stator slot 6 via a slot outlet 14.2 as a free jet, in particular in the slot head 6h or in the slot base 6g. The stator slots 6 can be closed by means of at least one slot closure 19 to seal the slot cooling paths 14. The slot closure can be produced, for example, according to Fig.1 and Fig.6 to Fig.8, by designing a single sleeve- or tubular slot closure as a separate element for closing all slot slots 6s. According to a second variant (not shown), a strip-shaped slot closure, in particular a cover slide, can be provided as a separate element in each slot slot 6s. According to a third variant (not shown), the slot closures 19 can each be formed by tooth head bridges that are part of the sheet metal laminations 16, connect tooth heads of adjacent stator teeth 5 and in particular have a reduced magnetic conductivity.
Erfindungsgemäß ist vorgesehen, dass im Statorblechpaket 4 zumindest ein Versorgungspfad 15 ausgebildet ist, der zur Kühlmedium-Versorgung zumindest eines Nut-Kühlpfads 14 jeweils in zumindest eine der Statornuten 6 mündet. According to the invention, it is provided that at least one supply path 15 is formed in the stator laminated core 4, which opens into at least one of the stator slots 6 in order to supply cooling medium to at least one slot cooling path 14.
Weiterhin ist erfindungsgemäß vorgesehen, dass der jeweilige Versorgungspfad 15 mit einem in radialer Richtung verlaufenden Radialkanal 15.1 in einen Nut-Zulauf 14.1 der jeweiligen Statornut 6 mündet und stromauf des Radialkanals 15.1 zumindest einen Jochkanal 15.2 umfasst, der in axialer Richtung im Statorjoch 7 verläuft und zur Kühlung des Statorjochs 7 vorgesehen ist. Furthermore, it is provided according to the invention that the respective supply path 15 opens into a slot inlet 14.1 of the respective stator slot 6 with a radial channel 15.1 running in the radial direction and comprises at least one yoke channel 15.2 upstream of the radial channel 15.1, which runs in the axial direction in the stator yoke 7 and is provided for cooling the stator yoke 7.
Fig.2B zeigt mehrere der Jochkanäle des erfindungsgemäßen Stators nach Fig.1 gemäß dem ersten Ausführungsbeispiel nach Fig.2A in einer linearen Abwicklungs- Darstellung. Fig.2B shows several of the yoke channels of the stator according to the invention according to Fig.1 according to the first embodiment according to Fig.2A in a linear development representation.
Beispielsweise sind mehrere Jochkanäle 15.2 des zumindest einen Versorgungspfades 15 über den Umfang des Statorjochs 7 verteilt und bilden auf diese Weise eine Mantelkühlung im Statorjoch 7. For example, several yoke channels 15.2 of the at least one supply path 15 are distributed over the circumference of the stator yoke 7 and in this way form a jacket cooling in the stator yoke 7.
Nach einem ersten Ausführungsbeispiel sind mehrere der Jochkanäle 15.2 als Durchgangskanäle 23 ausgebildet, die das Statorblechpaket 4 in axialer Richtung jeweils vollständig durchlaufen und jeweils zumindest einen Eingang 17 in den jeweiligen Radialkanal 15.1 aufweisen. Der Eingang 17 ist beispielsweise im Bereich der axialen Mitte des Durchgangskanals 23 vorgesehen, insbesondere in der axialen Mitte. An beiden Stirnseiten des Statorblechpakets 4 kann jeweils ein ringförmiger Verteilerkanal 20 angeordnet sein, der in die jeweiligen Jochkanäle 15.2 mündet und zur Kühlmedium-Versorgung der Versorgungspfade 15 vorgesehen ist. According to a first embodiment, several of the yoke channels 15.2 are designed as through-channels 23, which each pass completely through the stator laminated core 4 in the axial direction and each have at least one inlet 17 in the respective radial channel 15.1. The inlet 17 is provided, for example, in the region of the axial center of the through-channel 23, in particular in the axial center. An annular distribution channel 20 can be arranged on each of the two end faces of the stator laminated core 4, which opens into the respective yoke channels 15.2 and is provided for supplying the supply paths 15 with cooling medium.
Fig.3A zeigt eine Schnittansicht des erfindungsgemäßen Stators gemäß einem zweiten Ausführungsbeispiel bei einem Schnitt des Stators entlang der Linie ll-ll in Fig.1. Fig.3B zeigt mehrere der Jochkanäle des erfindungsgemäßen Stators nach Fig.1 gemäß dem zweiten Ausführungsbeispiel nach Fig.3A in einer linearen Abwicklungs- Darstellung. Fig.3A shows a sectional view of the stator according to the invention according to a second embodiment in a section of the stator along the line II-II in Fig.1. Fig.3B shows several of the yoke channels of the stator according to the invention according to Fig.1 according to the second embodiment according to Fig.3A in a linear development representation.
Nach dem zweiten Ausführungsbeispiel sind mehrere der Jochkanäle 15.2 als Kurzkanäle 24 ausgebildet, die von zumindest einer der beiden Stirnseiten des Statorblechpakets 4 ausgehend in axialer Richtung bis zum Eingang in den jeweiligen Radialkanal verlaufen und kürzer als ein Durchgangskanal 23 ausgebildet sind, insbesondere bis in einen axialen Zentralbereich des Statorblechpakets 4 reichen. According to the second embodiment, several of the yoke channels 15.2 are designed as short channels 24, which extend from at least one of the two end faces of the stator laminated core 4 in the axial direction to the entrance into the respective radial channel and are shorter than a through-channel 23, in particular extending into an axial central region of the stator laminated core 4.
Nach einer nicht dargestellten ersten Variante des zweiten Ausführungsbeispiels können nur Kurzkanäle 24 vorgesehen sein, die ausschließlich von einer der beiden Stirnseiten des Statorblechpakets 4 ausgehend verlaufen und dadurch eine Teilmantelkühlung erreichen, die nur einen axialen Teil des Statorjochs 7 ummantelt. Nach einer zweiten, in Fig.3A und Fig.3B dargestellten Variante des zweiten Ausführungsbeispiels können auch Kurzkanäle 24 vorgesehen sein, die von beiden Stirnseiten des Statorblechpakets 4 ausgehend verlaufen. Diese zweite Variante erreicht eine Vollmantelkühlung, die im wesentlichen das gesamte Statorjoch 7 ummantelt. Für die zweite Variante kann an beiden Stirnseiten des Statorblechpakets 4 jeweils ein ringförmiger Verteilerkanal 20 vorgesehen sein, der in die jeweiligen Jochkanäle 15.2 mündet und zur Kühlmedium-Versorgung der Versorgungspfade 15 vorgesehen ist. According to a first variant of the second embodiment (not shown), only short channels 24 can be provided, which run exclusively from one of the two end faces of the stator laminated core 4 and thereby achieve partial jacket cooling that only encases an axial part of the stator yoke 7. According to a second variant of the second embodiment shown in Fig.3A and Fig.3B, short channels 24 can also be provided, which run from both end faces of the stator laminated core 4. This second variant achieves full jacket cooling that essentially encases the entire stator yoke 7. For the second variant, an annular distribution channel 20 can be provided on both end faces of the stator laminated core 4, which opens into the respective yoke channels 15.2 and is intended to supply the supply paths 15 with cooling medium.
Die von einer der Stirnseiten des Statorblechpakets 4 ausgehenden Kurzkanäle 24 und die von der anderen Stirnseite ausgehenden Kurzkanäle 24 sind beispielsweise hinsichtlich der Umfangsposition paarweise zueinander ausgerichtet, insbesondere paarweise gegenüberliegend oder paarweise in der gleichen Umfangsposition angeordnet. Fig.4A zeigt mehrere der Jochkanäle des erfindungsgemäßen Stators nach Fig.1 gemäß einem dritten Ausführungsbeispiel in einer linearen Abwicklungs-Darstellung. Fig.4B zeigt eine erste Schnittansicht des erfindungsgemäßen Stators gemäß dem dritten Ausführungsbeispiel nach Fig.4A bei einem Schnitt des Stators entlang der LinieThe short channels 24 extending from one of the end faces of the stator laminated core 4 and the short channels 24 extending from the other end face are, for example, aligned with one another in pairs with regard to the circumferential position, in particular arranged opposite one another in pairs or in pairs in the same circumferential position. Fig.4A shows several of the yoke channels of the stator according to the invention according to Fig.1 according to a third embodiment in a linear development representation. Fig.4B shows a first sectional view of the stator according to the invention according to the third embodiment according to Fig.4A with a section of the stator along the line
IV-IV in Fig.4A. IV-IV in Fig.4A.
Fig.4C zeigt eine zweite Schnittansicht des erfindungsgemäßen Stators gemäß dem dritten Ausführungsbeispiel nach Fig.4A bei einem Schnitt des Stators entlang der LinieFig.4C shows a second sectional view of the stator according to the invention according to the third embodiment according to Fig.4A with a section of the stator along the line
V-V in Fig.4A. V-V in Fig.4A.
Nach dem dritten Ausführungsbeispiel sind mehrere Paare 15.2p von unterschiedlich langen Jochkanälen 15.2 vorgesehen und über den Umfang des Statorjochs 7 verteilt. Die Jochkanäle 15.2 jedes Paares 15.2p verlaufen von derselben Stirnseite des Statorblechpakets 4 ausgehend und sind in Umfangsrichtung gesehen zueinander benachbart, wobei einer der Jochkanäle 15.2 jedes Paares 15.2p ein Kurzkanal 24 und der andere der Jochkanäle 15.2 desselben Paares 15.2p ein Mäanderkanal 25 ist, der einen Durchgangsabschnitt 25.1 , einen Umlenkungsabschnitt 25.2 und einen Kurzabschnitt 25.3 umfasst. An der Stirnseite des Statorblechpakets 4, von der die Jochkanäle 15.2 ausgehen, kann ein ringförmiger Verteilerkanal 20 angeordnet sein, der in die jeweiligen Jochkanäle 15.2 mündet und zur Kühlmedium-Versorgung der Versorgungspfade 15 vorgesehen ist. According to the third embodiment, several pairs 15.2p of yoke channels 15.2 of different lengths are provided and distributed over the circumference of the stator yoke 7. The yoke channels 15.2 of each pair 15.2p run from the same end face of the stator laminated core 4 and are adjacent to one another in the circumferential direction, wherein one of the yoke channels 15.2 of each pair 15.2p is a short channel 24 and the other of the yoke channels 15.2 of the same pair 15.2p is a meander channel 25, which comprises a through section 25.1, a deflection section 25.2 and a short section 25.3. On the front side of the stator laminated core 4, from which the yoke channels 15.2 originate, an annular distribution channel 20 can be arranged, which opens into the respective yoke channels 15.2 and is intended for supplying the supply paths 15 with cooling medium.
Für jedes Paar 15.2p von Jochkanälen 15.2 sind der Kurzkanal 24 und der Kurzabschnitt 25.3 des Mäanderkanals 25 paarweise gegenüberliegend angeordnet, insbesondere in der gleichen Umfangsposition. For each pair 15.2p of yoke channels 15.2, the short channel 24 and the short section 25.3 of the meander channel 25 are arranged in pairs opposite one another, in particular in the same circumferential position.
Das dritte Ausführungsbeispiel erreicht auf diese Weise eine Vollmantelkühlung, die im wesentlichen das gesamte Statorjoch 7 ummantelt. In this way, the third embodiment achieves a full jacket cooling which essentially encases the entire stator yoke 7.
Die Umlenkungsabschnitte 25.2 der Mäanderkanäle 25 kann nach Fig.4A in einer stirnseitig am Statorblechpaket 4 angeordneten Umlenkeinrichtung 26 oder in nicht dargestellter Weise im Statorblechpaket 4 ausgebildet sein. Die Umlenkeinrichtung 26 kann beispielsweise ringförmig oder scheibenförmig ausgebildet sein und die Umlenkungsabschnitte aller Mäanderkanäle umfassen. The deflection sections 25.2 of the meander channels 25 can be formed according to Fig. 4A in a deflection device 26 arranged on the front side of the stator laminated core 4 or in a manner not shown in the stator laminated core 4. The deflection device 26 can, for example, be ring-shaped or disk-shaped and comprise the deflection sections of all meander channels.
Fig.5A zeigt eine Ausführung einer ersten Blechlamelle mit Kanalabschnitten zur Erzeugung von Radialkanälen im Statorblechpaket. Fig.5B zeigt eine Ausführung einer zweiten Blechlamelle mit Kanalabschnitten zur Erzeugung von Radialkanälen im Statorblechpaket. Fig.5A shows an embodiment of a first lamination with channel sections for creating radial channels in the stator lamination stack. Fig.5B shows an embodiment of a second lamination with channel sections for creating radial channels in the stator lamination stack.
Fig.5C zeigt eine Anordnung der ersten und zweiten Blechlamelle nach Fig.5A und 5B zur Erzeugung der Radialkanäle im Statorblechpaket. Fig.5C shows an arrangement of the first and second laminations according to Fig.5A and 5B for producing the radial channels in the stator laminated core.
Der Radialkanal 15.1 des jeweiligen Versorgungspfades 15 kann auf verschiedene Weise gebildet sein. Nach Fig.5A bis 5C kann er durch mehrere radiale Kanalabschnitte 18 gebildet sein, die radial versetzt in mehreren benachbarten Blechlamellen 16 ausgeführt sind und in radialer Richtung teilweise überlappen. Alternativ kann der Radialkanal 15.1 beispielsweise auch durch eine Ausstanzung oder Vertiefung in einer einzigen Blechlamelle 16 des Statorblechpakets 4 erzeugt sein. The radial channel 15.1 of the respective supply path 15 can be formed in various ways. According to Fig. 5A to 5C, it can be formed by several radial channel sections 18, which are radially offset in several adjacent sheet metal laminations 16 and partially overlap in the radial direction. Alternatively, the radial channel 15.1 can also be created, for example, by a punched-out or recess in a single sheet metal lamination 16 of the stator laminated core 4.
Fig.6 zeigt einen Nutquerschnitt entlang der Linie Vl-Vl in Fig.2A, Fig.7 einen Nutquerschnitt entlang der Linie Vll-Vll in Fig.2 A und Fig.8 zeigt einen Nutquerschnitt entlang der Linie Vlll-Vlll in Fig.2A. Fig.6 shows a groove cross-section along the line VI-VI in Fig.2A, Fig.7 shows a groove cross-section along the line VII-VIII in Fig.2A and Fig.8 shows a groove cross-section along the line VIII-VIII in Fig.2A.
Fig.9 zeigt eine Teilansicht des erfindungsgemäßen Stators mit verdrehten Lamellen zur Erzeugung von Stützstellen für die Leiterbündel. Fig.9 shows a partial view of the stator according to the invention with twisted lamellae for producing support points for the conductor bundles.
In den Statornuten 6 sind jeweils mehrere, in axialer Richtung bezüglich der Statorachse 3 voneinander beabstandete Stützstellen 11 zur Einklemmung und Halterung des in der jeweiligen Statornut 6 liegenden Leiters 8 bzw. Leiterbündels 9 gebildet. Die Stützstellen 11 können nach Fig.10 jeweils durch das Verdrehen von einzelnen oder mehreren Blechlamellen 16 des Statorblechpakets 4, insbesondere von einer Gruppe oder von mehreren Gruppen 28 von Blechlamellen 16, gebildet sein. Die verdrehten Blechlamellen 16 sind zur Bildung einer einzelnen der Stützstellen 11 gegenüber den übrigen Blechlamellen 16 des Statorblechpaketes 4 um die Statorachse 3 verdreht (in entgegengesetzter Richtung), beispielsweise um einen bestimmten Verdrehwinkel <|). Die jeweilige Stützstelle 11 ist beispielsweise gebildet durch zwei Gruppen 28 von Blechlamellen 16, die in entgegengesetzter Richtung um den bestimmten Verdrehwinkel t|) um die Statorachse 3 verdreht sind. Zwischen den erfindungsgemäßen Stützstellen 11 sind der Leiter 8 bzw. das Leiterbündel 9 der jeweiligen Statornut 6 frei schwebend, also ohne Kontakt zum Statorblechpaket 4, gelagert. Der Leiter 8 bzw. das Leiterbündel 9 der jeweiligen Statornut 6 ist also nur an den Stützstellen 11 mit dem Statorblechpaket 4 in Kontakt. Der jeweilige Nut-Kühlpfad 14 ist an den Stützstellen 11 zumindest verengt. Daher ist an den Stützstellen 11 jeweils ein Bypass 21 vorgesehen, um das Kühlmedium an der jeweiligen verengten Stützstelle 11 vorbeizuleiten. Die Bypässe 21 der jeweiligen Statornut 6 sind dabei ausgehend vom jeweiligen Nut-Zulauf 14.1 entlang des jeweiligen Nut-Kühlpfads 14 beispielsweise abwechselnd im Nutgrund 6g oder im Nutkopf 6h ausgebildet (Fig.2A, Fig.6 und Fig.8), wodurch ein mäanderförmiger Verlauf der Nut-Kühlpfade 14 erzielbar ist. In the stator slots 6, a plurality of support points 11 are formed, spaced apart from one another in the axial direction with respect to the stator axis 3, for clamping and holding the conductor 8 or conductor bundle 9 located in the respective stator slot 6. According to Fig. 10, the support points 11 can each be formed by twisting individual or multiple laminations 16 of the stator laminated core 4, in particular by a group or multiple groups 28 of laminations 16. To form an individual one of the support points 11, the twisted laminations 16 are twisted around the stator axis 3 relative to the other laminations 16 of the stator laminated core 4 (in the opposite direction), for example by a specific angle of twist <|). The respective support point 11 is formed, for example, by two groups 28 of laminations 16 which are twisted around the stator axis 3 in the opposite direction by the specific angle of twist t|). Between the support points 11 according to the invention, the conductor 8 or the conductor bundle 9 of the respective stator slot 6 are mounted so as to be freely suspended, i.e. without contact with the stator laminated core 4. The conductor 8 or the conductor bundle 9 of the respective stator slot 6 is therefore only in contact with the stator laminated core 4 at the support points 11. The respective groove cooling path 14 is at least narrowed at the support points 11. Therefore, a bypass 21 is provided at each support point 11 in order to guide the cooling medium past the respective narrowed support point 11. The bypasses 21 of the respective stator groove 6 are formed starting from the respective groove inlet 14.1 along the respective groove cooling path 14, for example alternately in the groove base 6g or in the groove head 6h (Fig. 2A, Fig. 6 and Fig. 8), whereby a meandering course of the groove cooling paths 14 can be achieved.
Der jeweilige Bypass 21 im Nutgrund 6g kann nach Fig.6 beispielsweise gebildet sein durch eine oder zwei Ausnehmungen in den Nutflanken 6f am Fuße der Statorzähne 5 oder eine Ausnehmung im Nutgrund 6g. The respective bypass 21 in the groove base 6g can be formed according to Fig.6, for example, by one or two recesses in the groove flanks 6f at the foot of the stator teeth 5 or a recess in the groove base 6g.
Der jeweilige Nutverschluss 19 hat für die jeweilige Statornut 6 nach Fig.2A, Fig.6 und Fig.8 jeweils mehrere in axialer Richtung voneinander beabstandete Versperrungen 22 zur Einstellung des mäanderförmigen Nut-Kühlpfads 14. Die Versperrungen 22 reichen insbesondere bis an oder nahe an den Leiter 8 bzw. das Leiterbündel 9 heran. The respective slot closure 19 has, for the respective stator slot 6 according to Fig.2A, Fig.6 and Fig.8, a plurality of blockings 22 spaced apart from one another in the axial direction for adjusting the meandering slot cooling path 14. The blockings 22 extend in particular up to or close to the conductor 8 or the conductor bundle 9.
Zwischen benachbarten Versperrungen 22 derselben Statornut 6 ist jeweils ein in axialer Richtung verlaufender Durchlass als Bypass 21 für den jeweiligen Nut-Kühlpfad vorgesehen. Fig.6 und Fig.7 zeigen eine der Versperrungen 22 des jeweiligen Nutverschlusses 19. Between adjacent blockages 22 of the same stator slot 6, a passage running in the axial direction is provided as a bypass 21 for the respective slot cooling path. Fig.6 and Fig.7 show one of the blockages 22 of the respective slot closure 19.

Claims

Ansprüche Claims
1 . Stator einer elektrischen Maschine (2) mit einer Statorachse (3) und mit einem Statorblechpaket (4), an dem Statorzähne (5) und zwischen den Statorzähnen (5) liegende Statornuten (6) ausgebildet sind und das ein die Statorzähne (5) verbindendes Statorjoch (7) umfasst, wobei sich die Statornuten (6) in radialer Richtung bezüglich der Statorachse (3) jeweils zwischen einem Nutgrund (6g) und einem Nutkopf (6h) erstrecken, wobei in den Statornuten (6) jeweils ein einziger Leiter (8) oder ein mehrere Leiter (8) umfassendes Leiterbündel (9), insbesondere ein Stapel von Flachdrahtleitern, zur Bildung einer elektrischen Statorwicklung (10) vorgesehen ist, wobei zwischen den Nutflanken (6f) der jeweiligen Statornut (6) und dem in der Statornut (6) angeordneten Leiter (8) bzw. Leiterbündel (9) zumindest ein Nutspalt (12) vorgesehen ist, der einen sich in axialer Richtung erstreckenden Nutspaltkanal (13) bildet, der entlang eines Nut-Kühlpfads (14) von einem Kühlmedium durchströmbar ist, dadurch gekennzeichnet, dass 1 . Stator of an electrical machine (2) with a stator axis (3) and with a stator laminated core (4) on which stator teeth (5) and stator slots (6) located between the stator teeth (5) are formed and which comprises a stator yoke (7) connecting the stator teeth (5), wherein the stator slots (6) extend in the radial direction with respect to the stator axis (3) between a slot base (6g) and a slot head (6h), wherein a single conductor (8) or a conductor bundle (9) comprising several conductors (8), in particular a stack of flat wire conductors, is provided in the stator slots (6) to form an electrical stator winding (10), wherein at least one slot gap (12) is provided between the slot flanks (6f) of the respective stator slot (6) and the conductor (8) or conductor bundle (9) arranged in the stator slot (6), which has a slot gap channel (13) extending in the axial direction. which can be flowed through by a cooling medium along a groove cooling path (14), characterized in that
- im Statorblechpaket (4) zumindest ein Versorgungspfad (15) ausgebildet ist, der zur Kühlmedium-Versorgung zumindest eines Nut-Kühlpfads (14) jeweils in zumindest eine der Statornuten (6) mündet, - at least one supply path (15) is formed in the stator laminated core (4), which opens into at least one of the stator slots (6) for supplying cooling medium to at least one slot cooling path (14),
- der jeweilige Versorgungspfad (15) mit einem Radialkanal (15.1) in einen Nut-- the respective supply path (15) with a radial channel (15.1) in a groove
Zulauf (14.1) der jeweiligen Statornut (6) mündet und stromauf des Radialkanals (15.1) zumindest einen Jochkanal (15.2) umfasst, der in axialer Richtung im Statorjoch (7) verläuft und zur Kühlung des Statorjochs (7) vorgesehen ist. Inlet (14.1) of the respective stator slot (6) opens and upstream of the radial channel (15.1) comprises at least one yoke channel (15.2) which runs in the axial direction in the stator yoke (7) and is provided for cooling the stator yoke (7).
2. Stator nach Anspruch 1 , dadurch gekennzeichnet, dass mehrere Jochkanäle (15.2) des zumindest einen Versorgungspfades (15) über den Umfang des Statorjochs (7) verteilt sind und eine Mantelkühlung des Statorjochs (7) bilden. 2. Stator according to claim 1, characterized in that several yoke channels (15.2) of the at least one supply path (15) are distributed over the circumference of the stator yoke (7) and form a jacket cooling of the stator yoke (7).
3. Stator nach Anspruch 2, dadurch gekennzeichnet, dass mehrere der Jochkanäle (15.2) Durchgangskanäle (23) sind, die das Statorblechpaket (4) in axialer Richtung jeweils vollständig durchlaufen und jeweils zumindest einen Eingang (17) in den jeweiligen Radialkanal (15.1) aufweisen, der insbesondere im Bereich der axialen Mitte oder in der axialen Mitte des Durchgangskanals (15.2) vorgesehen ist. 3. Stator according to claim 2, characterized in that several of the yoke channels (15.2) are through-channels (23) which each completely pass through the stator laminated core (4) in the axial direction and each have at least one entrance (17) into the respective radial channel (15.1), which is provided in particular in the region of the axial center or in the axial center of the through-channel (15.2).
4. Stator nach Anspruch 2, dadurch gekennzeichnet, dass mehrere der Jochkanäle4. Stator according to claim 2, characterized in that several of the yoke channels
(15.2) Kurzkanäle (24) sind, die von zumindest einer der beiden Stirnseiten des Statorblechpakets (4) ausgehend in axialer Richtung bis zum Eingang (17) in den jeweiligen Radialkanal (15.1) verlaufen und kürzer als ein Durchgangskanal (23) ausgebildet sind, insbesondere bis in einen axialen Zentralbereich des Statorblechpakets (4) reichen. (15.2) are short channels (24) which extend from at least one of the two end faces of the stator laminated core (4) in the axial direction to the entrance (17) in the respective radial channel (15.1) and are shorter than a through-channel (23), in particular extending into an axial central region of the stator laminated core (4).
5. Stator nach Anspruch 4, dadurch gekennzeichnet, dass mehrere Paare (15.2p) von Jochkanälen (15.2) vorgesehen und über den Umfang des Statorjochs (7) verteilt sind, wobei die Jochkanäle (15.2) jedes Paares (15.2p) von derselben Stirnseite des Statorblechpakets (4) ausgehend verlaufen und in Umfangsrichtung gesehen benachbart sind, wobei einer der Jochkanäle (15.2) jedes Paares (15.2p) ein Kurzkanal (24) und der andere der Jochkanäle (15.2) ein Mäanderkanal (25) ist, wobei der jeweilige Mäanderkanal (25) einen Durchgangsabschnitt (25.1), einen Umlenkungsabschnitt (25.2) und einen Kurzabschnitt (25.3) umfasst, wobei für jedes Paar (15.2p) von Jochkanälen (15.2) der Kurzkanal (24) und der Kurzabschnitt (25.3) des Mäanderkanals (25) paarweise gegenüberliegend angeordnet sind, insbesondere in der gleichen Umfangsposition. 5. Stator according to claim 4, characterized in that several pairs (15.2p) of yoke channels (15.2) are provided and distributed over the circumference of the stator yoke (7), the yoke channels (15.2) of each pair (15.2p) extending from the same end face of the stator laminated core (4) and being adjacent when viewed in the circumferential direction, one of the yoke channels (15.2) of each pair (15.2p) being a short channel (24) and the other of the yoke channels (15.2) being a meander channel (25), the respective meander channel (25) comprising a through section (25.1), a deflection section (25.2) and a short section (25.3), the short channel (24) and the short section (25.3) of the meander channel (25) being arranged in pairs for each pair (15.2p) of yoke channels (15.2). are arranged opposite one another, in particular in the same circumferential position.
6. Stator nach Anspruch 5, dadurch gekennzeichnet, dass der Umlenkungsabschnitt6. Stator according to claim 5, characterized in that the deflection section
(25.2) des Mäanderkanals (25) im Statorblechpaket (4) oder in einer stirnseitig am Statorblechpaket (4) angeordneten Umlenkeinrichtung (26) ausgebildet ist. (25.2) of the meander channel (25) is formed in the stator laminated core (4) or in a deflection device (26) arranged on the front side of the stator laminated core (4).
7. Stator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zumindest an einer der beiden Stirnseiten des Statorblechpakets (4) ein ringförmiger Verteilerkanal (20) angeordnet ist, der in die Jochkanäle (15.2) mündet und zur Kühlmedium-Versorgung der Versorgungspfade (15) vorgesehen ist. 7. Stator according to one of the preceding claims, characterized in that an annular distribution channel (20) is arranged at least on one of the two end faces of the stator laminated core (4), which opens into the yoke channels (15.2) and is provided for supplying the supply paths (15) with cooling medium.
8. Stator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in der jeweiligen Statornut (6) zwei in entgegengesetzte Richtung verlaufende Nut- Kühlpfade (14) vorgesehen sind, die an den Enden der jeweiligen Statornut (6) über einen Nut-Ablauf (14.2) als Freistrahl austreten, insbesondere im Nutkopf (6h) oder im Nutgrund (6g). 8. Stator according to one of the preceding claims, characterized in that in the respective stator slot (6) two slot cooling paths (14) running in opposite directions are provided, which exit at the ends of the respective stator slot (6) via a slot outlet (14.2) as a free jet, in particular in the slot head (6h) or in the slot base (6g).
9. Stator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Radialkanal (15.1) des jeweiligen Versorgungspfades (15) durch eine Ausstanzung oder Vertiefung in einer einzigen Blechlamelle (16) des Statorblechpaketes (4) oder durch mehrere radiale Kanalabschnitte (18) gebildet ist, die radial versetzt in mehreren benachbarten Blechlamellen (16) ausgeführt sind und in radialer Richtung teilweise überlappen. 9. Stator according to one of the preceding claims, characterized in that the radial channel (15.1) of the respective supply path (15) is formed by a punched-out or recess in a single sheet metal lamination (16) of the stator laminated core (4) or by several radial channel sections (18) which are radially offset in several adjacent sheet metal laminations (16) and partially overlap in the radial direction.
10. Stator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Statornuten (6) zur Abdichtung der Nut-Kühlpfade (14) mittels zumindest eines Nutverschlusses (19) verschlossen sind. 10. Stator according to one of the preceding claims, characterized in that the stator slots (6) are closed by means of at least one slot closure (19) to seal the slot cooling paths (14).
11 . Stator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in den Statornuten (6) jeweils mehrere, in axialer Richtung bezüglich der Statorachse (3) voneinander beabstandete Stützstellen (11) zur Einklemmung des in der jeweiligen Statornut (6) liegenden Leiters (8) bzw. Leiterbündels (9) gebildet sind, wobei die Stützstellen (11) jeweils durch das Verdrehen von einzelnen oder mehreren Blechlamellen (16) des Statorblechpakets (4), insbesondere von einer Gruppe oder von mehreren Gruppen (28) von Blechlamellen (16), gebildet sind. 11. Stator according to one of the preceding claims, characterized in that in the stator slots (6) there are formed a plurality of support points (11) which are spaced apart from one another in the axial direction with respect to the stator axis (3) for clamping the conductor (8) or conductor bundle (9) lying in the respective stator slot (6), wherein the support points (11) are each formed by the rotation of individual or several laminations (16) of the stator lamination stack (4), in particular of a group or of several groups (28) of laminations (16).
12. Elektrische Maschine (2) mit einem Stator (1) nach einem der vorhergehenden Ansprüche. 12. Electrical machine (2) with a stator (1) according to one of the preceding claims.
PCT/EP2024/052985 2023-03-06 2024-02-07 Stator of an electric machine WO2024183999A1 (en)

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US10158263B2 (en) * 2016-08-17 2018-12-18 Atieva, Inc. Motor cooling system utilizing axial cooling channels
US10797542B2 (en) * 2017-12-13 2020-10-06 Ferrari S.P.A. Stator of an electric machine provided with fluid cooling
DE102019113785A1 (en) 2019-05-23 2020-11-26 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Stator of an electrical machine
CN113937919A (en) * 2021-10-18 2022-01-14 珠海格力电器股份有限公司 Stator cooling structure, driving motor and new energy automobile
DE102021207921A1 (en) * 2021-07-23 2023-01-26 Robert Bosch Gesellschaft mit beschränkter Haftung Stator of an electrical machine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10158263B2 (en) * 2016-08-17 2018-12-18 Atieva, Inc. Motor cooling system utilizing axial cooling channels
US10797542B2 (en) * 2017-12-13 2020-10-06 Ferrari S.P.A. Stator of an electric machine provided with fluid cooling
DE102019113785A1 (en) 2019-05-23 2020-11-26 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Stator of an electrical machine
DE102021207921A1 (en) * 2021-07-23 2023-01-26 Robert Bosch Gesellschaft mit beschränkter Haftung Stator of an electrical machine
CN113937919A (en) * 2021-10-18 2022-01-14 珠海格力电器股份有限公司 Stator cooling structure, driving motor and new energy automobile

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