EP4229738A1 - Stator à fonction de refroidissement intégrée, procédé de fabrication d'un stator et machine électrique - Google Patents

Stator à fonction de refroidissement intégrée, procédé de fabrication d'un stator et machine électrique

Info

Publication number
EP4229738A1
EP4229738A1 EP21790911.8A EP21790911A EP4229738A1 EP 4229738 A1 EP4229738 A1 EP 4229738A1 EP 21790911 A EP21790911 A EP 21790911A EP 4229738 A1 EP4229738 A1 EP 4229738A1
Authority
EP
European Patent Office
Prior art keywords
stator
yoke
cooling channel
cooling
pole teeth
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP21790911.8A
Other languages
German (de)
English (en)
Inventor
Astrid Haas
Wilhelm Hackmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vitesco Technologies Germany GmbH
Original Assignee
Vitesco Technologies Germany 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 Vitesco Technologies Germany GmbH filed Critical Vitesco Technologies Germany GmbH
Publication of EP4229738A1 publication Critical patent/EP4229738A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H02K1/165—Shape, form or location of the slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Definitions

  • the invention relates to a stator for an electrical machine, the stator having a yoke which is designed in the shape of a circular ring and has a plurality of pole teeth.
  • a stator winding designed as a mat is arranged between the pole teeth, a cooling channel through which a cooling medium can flow for cooling the stator being formed between the yoke and the stator winding and/or between the stator winding and a pole shoe of a pole tooth.
  • the invention relates to a method for producing the stator according to the invention, and an electrical machine with the stator according to the invention.
  • a stator for an electrical machine is known in principle.
  • different cooling concepts for stators are known in order to cool them during the operation of the electrical machine.
  • end windings are cooled by ambient air that is sucked in and is blown out in the radial direction of the stator. Cooling the winding overhangs alone is often not sufficient to efficiently cool the electrical machine or the stator.
  • a cooling channel can be formed between a stator and a housing surrounding the stator in order to be able to cool an outer jacket surface of the stator, as is described in EP 3 127 223 B1, for example. External cooling of the stator can lead to an increased space requirement.
  • a stator for an electrical machine of a motor vehicle having a ring-shaped yoke with an inner side facing inward in the radial direction of the yoke, a plurality of pole teeth being positively connected to the yoke on the inner side of the yoke, and the pole teeth are arranged spaced apart from one another in the circumferential direction of the yoke, a stator winding designed as a mat, which is arranged between the pole teeth, a first cooling duct through which a cooling medium can flow, which extends in the longitudinal direction of the stator, the first cooling duct being arranged in a recess which extends outwards in the radial direction of the yoke, starting from the inside of the yoke between two adjacent pole teeth, the first cooling channel at least partially bears directly against a wall defining the recess and/or partially bears directly against the stator winding, and/or a cooling channel with a cooling A second cooling channel through which a
  • one aspect of the invention is that a stator for an electric machine of a motor vehicle is specified.
  • the electric machine is preferably used in the drive train of the motor vehicle.
  • the electrical machine can preferably be a traction drive.
  • the motor vehicle can be a partially or fully electrically powered motor vehicle.
  • the stator has an annular yoke.
  • the yoke is formed by a plurality of ring-shaped stamped metal sheets, which are arranged one behind the other in the axial direction of the stator and are connected to one another.
  • the connection can be an adhesive connection and/or a welded connection and/or an embossed connection.
  • the yoke has an inner side on a side directed inwards in the radial direction of the stator or the yoke.
  • a plurality of pole teeth are arranged at least partially in a form-fitting manner, the pole teeth being arranged spaced apart from one another in the circumferential direction of the yoke.
  • At least partially positively connected means that, in addition to the positive connection between the pole tooth and the yoke, a material connection can also be provided, for example, in order to increase the rigidity of the connection of the pole teeth to the yoke.
  • the distance between the pole teeth, in particular a pole shaft of the pole teeth, in the circumferential direction of the yoke is preferably a uniform and/or regular distance.
  • the pole teeth can each be designed as a single tooth. It is also conceivable that the pole teeth are connected to one another via a narrow web on an outside facing away from the yoke. In other words, each pole tooth has a pole shoe on a side facing away from the yoke, it being possible for the pole shoe of two adjacent pole teeth to be connected to one another.
  • a stator winding is arranged between the pole teeth, which winding extends in the longitudinal direction of the stator and is formed into a winding overhang at the front and/or end of the stator.
  • the stator winding is designed as a mat.
  • Such a stator winding can also be referred to as an endless winding and/or a shaped wire winding.
  • the mat is characterized by the fact that the three conductors U, V, W are formed in one plane to form a shaped wire structure before they are placed on the pole teeth and are then inserted between the pole teeth.
  • the electrical conductors of the mat are made of copper or at least partially have copper.
  • the electrical conductors have an essentially rectangular cross-section, based on its longitudinal direction.
  • the conductors can have an insulating coating, so that the layers of the stator winding are electrically isolated from one another.
  • a recess extending outwards in the radial direction of the yoke is formed between two pole teeth which are arranged next to one another.
  • the recess can preferably also be referred to as a groove, which extends in the longitudinal direction of the yoke between the pole teeth, the groove opening being directed inwards in the radial direction of the yoke.
  • a first cooling channel through which a cooling medium can flow is arranged and/or formed in the recess and extends in the longitudinal direction of the stator. At least in sections, the first cooling channel bears directly against a wall defining the recess and/or in sections directly against the stator winding.
  • Directly adjacent means that a wall material forming the first cooling channel is in direct contact with the yoke and/or with an insulating sheathing of an electrical conductor of the stator winding.
  • the first cooling channel is consequently arranged in the recess, as a result of which cooling integrated in the stator is provided. Due to the direct, ie immediate, contact of the first cooling channel to the yoke or to the stator winding, the stator can be cooled directly at the stator winding, whereby the cooling of the stator can be increased and the performance of the electrical machine can be increased.
  • a second cooling duct through which the cooling medium can flow is formed between a winding inside of the stator winding pointing inwards in the radial direction of the stator and a pole shoe of the pole tooth. At least in sections, the second cooling duct bears directly against the stator winding and/or the pole shoe.
  • Directly means that a wall material forming the second cooling channel is in direct contact with an electrical conductor of the stator winding or with the pole tooth.
  • the second cooling channel is thus arranged between the pole teeth in the immediate vicinity of the inside of the stator. Due to the direct, i.e. immediate, contact of the first cooling channel with the stator winding or the pole shoe, the stator can be cooled directly on the stator winding close to a rotor, whereby the cooling of the stator can be increased and the performance of the electrical machine can be increased.
  • the installation space of the stator and/or the electrical machine can also be reduced by the cooling integrated in the stator as a result of the first cooling channel and/or the second cooling channel.
  • the cooling medium is preferably a cooling liquid.
  • the coolant can be oil or water.
  • the first cooling duct runs to the inside of the yoke.
  • the stator winding is guided in an intermediate space between the pole teeth, in relation to the radial direction of the yoke, to the inside, and the first cooling channel bears directly, at least in sections, against the stator winding.
  • the intermediate space can be filled up to the maximum with the stator winding, as a result of which a high level of efficiency of the electrical machine can be achieved.
  • the arrangement of the cooling channel in the recess of the yoke with direct contact to the stator winding allows efficient cooling.
  • the first cooling channel is guided, starting from the recess, into an intermediate space between the pole teeth.
  • the stator can be cooled not only at the level of the yoke, based on its circumferential direction, but also at the level of the pole teeth, based on the circumferential direction of the stator. Effective cooling in the area of the stator winding can thus be achieved.
  • stator winding is designed in one layer in relation to the radial direction of the stator, with a side of the single-layer stator winding pointing outwards in the radial direction of the stator against the first cooling duct at least in sections and/or a side directed inwards in the radial direction of the stator bears against the second cooling duct.
  • stator winding is designed in multiple layers with respect to the radial direction of the stator, and is designed in one layer between two pole teeth with respect to the circumferential direction of the stator. Due to the single-layer arrangement of the stator winding between two pole teeth, based on the circumferential direction of the stator, the stator winding can be inserted in a simple manner. If the gap between two pole teeth in the circumferential direction of the stator is insignificantly wider than the width of the stator winding, this can also easily be arranged in a secure position between the pole teeth. The degree of filling of the stator winding between the pole teeth can be increased accordingly via the multi-layer structure of the stator winding in the radial direction, as a result of which the performance of the electrical machine can be increased.
  • the first cooling duct and/or the second cooling duct is connected to a first annular duct at the front and/or end of the stator and/or the second cooling duct is connected to a second annular duct at the front and/or end.
  • the stator accordingly has an end face or end face at its axial end.
  • the first cooling duct is connected to the first annular duct in a fluid-tight and/or medium-tight manner, so that the cooling medium can pass and/or flow from the first cooling duct into the first annular duct.
  • the second cooling channel opens into a second annular channel.
  • the first annular duct can on the one hand be an arcuate segment that connects two spaced-apart first cooling ducts to one another on the end face of the stator.
  • the first annular duct can also be designed in the form of a circular ring in order to fluidly connect a plurality of first cooling ducts with one another.
  • the first annular channel can have an outlet and/or an inlet.
  • the cold cooling medium can be supplied via the inlet.
  • the heated cooling medium is discharged via the outlet.
  • the circular ring-shaped first ring channel can preferably the front side of the stator formed end turns of the stator winding on its outer peripheral side and / or on its inner peripheral side, based on the radial direction of the stator surrounded.
  • first annular duct for connection to the first cooling duct applies correspondingly to the second annular duct for fluidic connection to the second cooling duct. It is also conceivable and particularly preferably provided that the first annular duct of the first cooling duct is fluidically connected to the second annular duct of the second cooling duct.
  • first cooling channel and/or the second cooling channel can be designed in such a way that they can conduct a cooling medium, are temperature-resistant and have increased resistance to corrosive media.
  • first cooling channel and/or the second cooling channel are made of a plastic material.
  • the plastic material can preferably be a duroplastic material.
  • Plastics have increased resistance to aggressive and corrosive media.
  • Thermosetting plastics have increased temperature resistance.
  • plastics are very light, so that a cooling channel can be provided that is temperature-resistant, can have a reduced weight and is suitable for aggressive environmental media.
  • the pole shoes of two adjacent pole teeth are designed without gaps. In other words, no gap is formed between the individual pole shoes through which the stator winding could be introduced into the gap.
  • the gap-free design of the pole shoes, based on the circumferential direction of the stator, can be advantageous for the torque of the electrical machine.
  • the pole teeth are positively connected to the inside of the yoke.
  • the form closure can take place in a wide variety of ways.
  • An advantageous development of the invention is that the pole teeth are connected to the yoke via a dovetail-shaped connection.
  • a pole tooth generally has a pole shaft, the pole shoe being formed adjoining the pole shaft in the radial direction of the stator.
  • a width of the pole shoe, based on the circumferential direction of the stator is greater than a width of the pole shank, based on the circumferential direction of the stator.
  • the pole tooth is designed like a hammer head.
  • the pole tooth On a side facing away from the pole shoe, the pole tooth has a dovetail-shaped projection which engages in a recess on the inside of the yoke that corresponds to the dovetail-shaped projection.
  • a dovetail-shaped positive connection forms a secure and rigid connection between the pole tooth and the yoke, which can have a positive effect on the noise development of the electrical machine, in particular on the noise, vibration and harshness behavior (NVH).
  • a depth of the recess in the radial direction corresponds approximately to a width of the recess in the circumferential direction of the yoke near the inside. Approximately means that, based on the width of the recess in the circumferential direction of the yoke on the inside, the depth is either at most 30% greater or at most 30% less than the width of the recess.
  • the borders are included.
  • the recess based on the cross section of the yoke, is designed to widen outwards, starting from the inside in the radial direction.
  • the cross section of the recess and/or the groove increases over its depth, starting from the inside, in the radial direction of the yoke.
  • An inner diameter of the cooling channel can preferably be round. However, it is also conceivable for the inner diameter to have an oval and/or angular, for example square, configuration. It is advantageously provided that the yoke has a yoke outer side on an outer side directed outwards in the radial direction, and the stator is arranged in a housing, with a third cooling channel being formed between the yoke outer side and the housing. In this way, the cooling capacity of the electrical machine can be increased since, in addition to the integrated stator cooling via the first cooling duct and/or the second cooling duct, the third cooling duct is also provided in order to cool the electrical machine.
  • the third cooling channel preferably runs in the longitudinal direction of the stator.
  • the third cooling duct can have a plurality of third cooling ducts which are arranged parallel to one another and open into a third annular duct at the end of the stator.
  • the third cooling channel is fluidically connected to the first cooling channel and/or the second cooling channel.
  • the third ring channel is fluidically coupled to the first ring channel and/or the second ring channel.
  • the invention also relates to a method for producing the stator according to the invention, the first cooling channel and/or the second cooling channel being formed by an overmolding process and/or a transfer molding process.
  • the first cooling channel and/or the second cooling channel can be formed in a simple and inexpensive manner, preferably from plastic.
  • the first cooling duct and/or the second cooling duct is formed after the positive arrangement of the pole teeth having the stator winding on the yoke.
  • the stator winding is first placed in the space between the pole teeth.
  • the pole teeth are then positively connected to the yoke and the end winding is formed.
  • the first cooling channel and/or the second cooling channel are formed.
  • a lance is guided into the recess in the longitudinal direction of the stator, and the annular space between the lance, the wall of the recess and the stator winding is shed. In this way, the integrated first cooling channel can be manufactured inexpensively.
  • an optimal thermal connection of the first cooling channel to the yoke and the stator winding can be achieved.
  • a lance is guided between the inside of the winding and the pole shoes and the annular space is then sprayed out, which achieves an optimal thermal connection of the second cooling channel to the stator winding and the pole tooth.
  • the stator winding can be fixed in a secure position in the space between the pole teeth via the encapsulation.
  • the invention also relates to an electrical machine with the stator according to the invention.
  • the electrical machine is preferably a traction drive in an at least partially electrically powered motor vehicle.
  • stator also applies to the electrical machine according to the invention and/or the method according to the invention. This also applies vice versa.
  • 1 shows a section of a stator in cross section with first cooling channels
  • 2 shows a detail of the stator in cross section without a stator winding with first cooling ducts
  • FIG. 3 shows a section of the stator in cross section with second cooling ducts and third cooling ducts
  • FIG 4 shows a three-dimensional view of a section of the stator with the second and the third cooling channels.
  • FIG. 6 shows a schematic view of a motor vehicle with an electric machine which has the stator
  • FIG. 1 shows a section or a detailed view of a stator 10 in a cross section of the stator 10 .
  • the stator 10 has an annular yoke 12 .
  • the yoke 12 can also be referred to as a yoke ring.
  • the yoke 12 is formed by a plurality of annular stamped metal sheets, which are arranged one behind the other in the axial direction of the stator 10 and are connected to one another.
  • the laminations are preferably soft-magnetic electrical laminations.
  • the connection can be a welded connection or an adhesive connection, for example.
  • the yoke 12 has an inner side 14 on an inward side in the radial direction of the yoke 12 .
  • a plurality of pole teeth 16 are arranged at least in a form-fitting manner on the inside 14 .
  • At least partially positively connected means that, in addition to the positive connection, a material connection of the pole teeth 16 to the yoke 12 can also be provided, for example, in order to increase the rigidity of the connection of the pole teeth 16 to the yoke 12 .
  • a pole tooth 16 generally has a pole shaft 18 and a pole shoe 20 adjoining the pole shaft 18 in the radial direction of the stator 10 .
  • a width of the pole shoe 20, based on the circumferential direction of the stator 10, is greater than a width of the pole shaft 18, based on the circumferential direction of the stator 10.
  • the pole tooth 16 is designed like a hammer head.
  • the pole tooth 16 On a side facing away from the pole piece 20, the pole tooth 16 has a dovetail-shaped projection 22 which engages in a recess 24 corresponding to the dovetail-shaped projection 22 on the inside 14 of the yoke 12 .
  • Such a form fit forms a secure connection between pole tooth 16 and yoke 12.
  • the pole teeth 16 are spaced apart from one another in the circumferential direction of the yoke 12 . It is conceivable that the pole teeth 16 are designed as individual teeth. However, it can also be provided that the pole teeth 16 are connected to one another on an outer side 26 facing away from the yoke 12 via a narrow web 28 in the circumferential direction of the stator 10 . In other words, the pole shoes 20 of two pole teeth 16 arranged next to one another are formed without a gap in relation to one another in the circumferential direction of the stator 10 .
  • the distance between the pole teeth 16, in particular the pole shafts 18, in the circumferential direction of the yoke 12 is a uniform or regular distance.
  • a stator winding 29 designed as a mat is arranged between the pole teeth 16 and the pole shafts 18, which extends in the longitudinal direction of the stator 10 and is designed at the end face of the stator 10 to form a winding overhang (not shown).
  • a recess 30 extending outwards in the radial direction of the yoke 12 is formed between two pole teeth 16 which are arranged next to one another.
  • the recess 30 can preferably also be referred to as a groove, which extends in the longitudinal direction of the yoke 12 between the pole teeth 16, with a groove opening 32 of the recess 30 being directed inward in the radial direction of the yoke 12.
  • a first cooling channel 34 through which a cooling medium can flow is arranged in the recess 30 and extends in the longitudinal direction of the stator 10 .
  • the cooling medium is preferably a cooling liquid.
  • the coolant can be oil or water.
  • the first cooling channel 34 is arranged in the recess 30, as a result of which cooling integrated in the stator 10 is provided.
  • the first cooling channel 34 rests on the one hand on a wall 36 defining the recess 30 and on the other hand at least in sections on the stator winding
  • the direct, ie direct contact of the first cooling channel 34 to a partial area of the stator winding 29 and to the wall 36 of the recess 30 allows the stator 10 to be efficiently cooled, whereby the performance of the electrical machine 40 can be increased at the same time.
  • the installation space of the stator 10 and/or the electric machine 40 can be reduced by the cooling integrated in the stator 10 .
  • a depth of the recess 30 in the radial direction of the yoke 12 corresponds approximately to a width of the recess 30 in the circumferential direction of the yoke 12 near or on the inside 14. Approximately means that based on the width of the recess
  • the depth is either up to a maximum of 30% greater or up to a maximum of 30% smaller than the width of the recess 30. The limits are included.
  • the recess 30 is designed to widen outwards in the radial direction, starting from the inside 14.
  • the cross section of the recess 30 and/or the groove increases in the radial direction of the yoke 12, starting from the inside 14.
  • the first cooling channel 34 can preferably be positioned securely in the recess 30 .
  • the stator winding 29 is multi-layered in relation to the radial direction of the stator 10, the radially outer layer of the stator winding 29 bearing against the first cooling channel 34 at least in sections. Relative to the circumferential direction of the stator, the stator winding 29 is formed in a single layer between two pole teeth 16 .
  • the stator winding 29 arranged next to one another in the radial direction is formed by the mat or shaped wire winding, the electrical conductor of the shaped wire winding being made of copper and/or at least partially having copper.
  • the electrical conductor has an essentially rectangular cross section, based on its longitudinal direction.
  • the stator winding 29 is within the space defined by the pole teeth 16 Gap arranged side by side in the radial direction, wherein the electrical conductors arranged side by side are arranged galvanically insulated from one another and/or have an insulating coating.
  • FIG. 2 shows a further excerpt or a detailed view of the stator 10 known from FIG. 1, the stator winding 29 not being shown.
  • the first cooling channel 34 can be arranged in the recess 30 in different ways. It is conceivable that the first cooling channel 34 is designed as a hose. It can be provided that before the pole teeth 16 are connected to the yoke 12, the first cooling channel 34 is inserted into the recess 30 and/or clamped. It is conceivable that the first cooling channel 34 also protrudes at least in sections beyond the inside 14 in the direction of the pole teeth 16 . It is also possible for the first cooling channel 34 to end flush with the inside 14 .
  • an inner diameter of the first cooling channel 34 can have a round or an angular cross section, for example. Even if not shown, it is provided that a first cooling channel 34 is arranged in each recess 30 between the pole teeth 16 . This also applies to FIG. 1 , where only a first cooling channel 34 is shown.
  • FIG. 3 shows a section of the stator 10, the stator 10 now having a second cooling channel 44 in contrast to the stator 10 shown in FIGS.
  • the second cooling channel 44 is arranged between two adjacent pole teeth 16 between a winding inner side 46 of the stator winding 29 directed inwards in the radial direction of the stator 10 and a pole shoe 20 of the pole tooth 16 .
  • the second cooling channel 44 rests directly, at least in sections, on the winding inner side 46 of the stator winding 29 and on the pole shoe 20 , at least in sections.
  • Directly means that a wall forming the second cooling channel 44 .
  • FIG. 4 shows a three-dimensional view of the stator 10 known from FIG. 3 for the electrical machine 40 .
  • the stator 10 is arranged in a housing 49 of the electrical machine 40 .
  • a third cooling channel 50 is arranged and/or formed between a yoke outside 48 directed outwards in the radial direction of the stator 10 and the housing 49 .
  • the third cooling channel 50 is essentially U-shaped, with the ends of the upright webs of the U-shaped third cooling channel 50 sealing against the housing 49 and thus forming the third cooling channel 50 . Due to the direct connection of the third cooling channel 50 to the yoke 12 and to the housing 49, an increased cooling effect can also be achieved.
  • FIG. 5 shows a three-dimensional view of the second cooling channel 44 and the third cooling channel 50 .
  • the second cooling channel 44 ends at the respective distal end in a second ring channel 52.
  • the third cooling channel 50 opens at its distal end into a third ring channel 54. In this way, the cooling medium can be distributed accordingly over the respective ring channel 52, 54. Even if not shown, provision can be made for the second ring channel 52 and the third ring channel 54 to be fluidly connected to one another.
  • Motor vehicle 38 is an at least partially electrically powered motor vehicle.
  • An electric machine 40 in which the stator 10 is arranged is arranged in the drive train of the motor vehicle 38 .
  • Fig. 7 shows a method for producing a stator 10.
  • a first step 100 an annular yoke 12 is provided, which on the inner side 14 alternately has recesses 30 for receiving the first cooling channel 34 and receptacles 24 corresponding to the dovetail-shaped projections 22 of the pole teeth 16 having.
  • the pole teeth 16 are provided, with an endless stator winding 29 being arranged in multiple layers between the mutually spaced pole teeth 16, starting from a side facing away from the pole shoe 20.
  • a third step 120 the pole teeth 16 having the stator winding 29 are positively connected to the yoke 12, so that the dovetail-shaped projections 22 of the pole shoes 16 engage in the corresponding receptacles 24 of the yoke 12.
  • the end winding is formed.
  • the first cooling channel 34 and/or the second cooling channel 44 are formed.
  • a first cooling channel 34 is formed in the recess 30 or in the plurality of recesses 30 by an overmolding and/or transfer molding process.
  • a lance is guided into the recess 30 in the longitudinal direction of the stator 10 .
  • the annular space between the lance, the wall 36 of the recess 30 and the stator winding 29 is then cast.
  • the integrated first cooling channel 34 can be produced inexpensively and have an optimal thermal connection to the yoke 12 and the stator winding 29 .
  • the stator winding 29 can be arranged in a secure position in the space between the pole teeth 16 via the encapsulation. It is conceivable that the end winding and an outer lateral surface 42 of the yoke 12, which is arranged at a distance from the inside 14, are also cast and/or encapsulated with plastic by the transfer molding process.
  • a lance is inserted into the space between the inner side of the winding 46 and the pole shoes 20 of two adjacent pole teeth 16, and the annular space between the lance and the stator winding 29 or between the lance and the pole shoes 20 is cast with a plastic and /or squirted out.

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

Abstract

L'invention concerne un stator (10) pour une machine électrique (40) d'un véhicule automobile (38), ayant une culasse annulaire (12) avec une face interne (14) orientée vers l'intérieur dans la direction radiale de la culasse (12), une pluralité de dents polaires (16) étant reliées à la culasse (12) par complémentarité de forme sur la face interne (14) de la culasse (12) et étant espacées les unes des autres dans la direction circonférentielle de la culasse (12) ; un enroulement de stator (29) qui est réalisé sous la forme d'un mat et qui est disposé entre les dents polaires (16) ; et un premier canal de refroidissement (34) à travers lequel un agent de refroidissement peut s'écouler et qui s'étend dans la direction longitudinale du stator (10), le premier canal de refroidissement (34) étant disposé dans un évidement (30) qui s'étend vers l'extérieur à partir de la face intérieure (14) de la culasse (12) dans la direction radiale de la culasse (12) entre deux dents polaires adjacentes (16), et le premier canal de refroidissement (34) se trouve au moins en partie directement contre une paroi (36) qui définit l'évidement (30) et/ou en partie directement contre l'enroulement de stator (29) et/ou un deuxième canal de refroidissement (44) à travers lequel un agent de refroidissement peut s'écouler, le deuxième canal de refroidissement (44) étant disposé entre deux dents polaires adjacentes (16) entre une face interne d'enroulement (46) de l'enroulement de stator (29) orientée vers l'intérieur dans la direction radiale du stator (10) et un patin polaire (20) de la dent polaire (16), et le deuxième canal de refroidissement (44) repose au moins partiellement contre l'enroulement de stator (29) et/ou le patin polaire (20).
EP21790911.8A 2020-10-14 2021-10-14 Stator à fonction de refroidissement intégrée, procédé de fabrication d'un stator et machine électrique Pending EP4229738A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020212923.1A DE102020212923A1 (de) 2020-10-14 2020-10-14 Stator mit integrierter Kühlung, Verfahren zur Herstellung eines Stators und elektrische Maschine
PCT/EP2021/078382 WO2022079135A1 (fr) 2020-10-14 2021-10-14 Stator à fonction de refroidissement intégrée, procédé de fabrication d'un stator et machine électrique

Publications (1)

Publication Number Publication Date
EP4229738A1 true EP4229738A1 (fr) 2023-08-23

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DE102021107454B4 (de) * 2021-03-25 2023-02-02 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Statoreinrichtung für eine elektrische Maschine und Verfahren zur Herstellung
DE102022205711A1 (de) 2022-06-03 2023-12-14 Vitesco Technologies Germany Gmbh Stator für eine elektrische Maschine, elektrische Maschine, Kraftfahrzeug und Verfahren zur Herstellung eines Stators
WO2024046562A1 (fr) * 2022-08-31 2024-03-07 Gkn Automotive Limited Stator de machine électrique avec canaux de refroidissement internes

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EP1404002B1 (fr) * 2002-09-11 2007-03-28 Mitsubishi Denki Kabushiki Kaisha Alternateur de vehiculs
JP5470015B2 (ja) * 2009-12-04 2014-04-16 株式会社日立製作所 回転電機
DE102014205930A1 (de) 2014-03-31 2015-10-01 Continental Automotive Gmbh Elektrische Maschine
DE102014220148A1 (de) * 2014-10-06 2016-04-07 Robert Bosch Gmbh Linearmaschine und Verfahren zum Herstellen einer Linearmaschine mit segmentiertem Primärteil
DE102017210778A1 (de) 2017-06-27 2018-12-27 Mahle International Gmbh Elektrische Maschine, insbesondere für ein Fahrzeug
DE102017211317A1 (de) * 2017-07-04 2019-01-10 Bayerische Motoren Werke Aktiengesellschaft Stator einer elektrischen Maschine sowie Kühlvorrichtung hierfür
DE102017218933A1 (de) * 2017-10-24 2019-04-25 Bayerische Motoren Werke Aktiengesellschaft Kühlvorrichtung für einen Stator einer elektrischen Maschine eines Kraftfahrzeugs, Stator sowie Kraftfahrzeug
FR3082376B1 (fr) * 2018-06-07 2020-07-17 Moteurs Leroy-Somer Stator de machine electrique tournante
JP7331380B2 (ja) * 2019-02-26 2023-08-23 株式会社Ihi 固定子

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DE102020212923A1 (de) 2022-04-14
CN220342115U (zh) 2024-01-12
US20230253844A1 (en) 2023-08-10

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