WO2022207763A1 - Dispositif d'isolation, stator et machine électrique - Google Patents

Dispositif d'isolation, stator et machine électrique Download PDF

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Publication number
WO2022207763A1
WO2022207763A1 PCT/EP2022/058506 EP2022058506W WO2022207763A1 WO 2022207763 A1 WO2022207763 A1 WO 2022207763A1 EP 2022058506 W EP2022058506 W EP 2022058506W WO 2022207763 A1 WO2022207763 A1 WO 2022207763A1
Authority
WO
WIPO (PCT)
Prior art keywords
winding
section
stator
star point
point connection
Prior art date
Application number
PCT/EP2022/058506
Other languages
German (de)
English (en)
Inventor
Dotz BORIS
Christian FINGER-ALBERT
Original Assignee
Valeo Siemens Eautomotive 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 Valeo Siemens Eautomotive Germany Gmbh filed Critical Valeo Siemens Eautomotive Germany Gmbh
Publication of WO2022207763A1 publication Critical patent/WO2022207763A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
    • 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
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations

Definitions

  • the present invention relates to an insulation device for electrically insulating a winding overhang of a stator winding from connection elements for electrical connections of the stator winding, the insulation device having a plate-shaped body which has a first side which is designed to extend in the circumferential direction at least partially over an axial end of the end winding, a second side, which is arranged opposite the first side and on which the connection elements can be arranged, and at least one recess which extends from the first side to the second side and through which at least one of the connections from the can be carried out on the first side in order to be electrically conductively connected to one of the connection elements on the second side.
  • the invention relates to a stator for an electrical machine and an electrical machine.
  • a stator winding of a stator for an electrical machine typically forms a winding overhang on one of the end faces of a stator core. If the stator is to be connected from this side, additional insulation measures are required to electrically insulate the end winding from connection elements for electrical connections of the stator winding.
  • US 2013/0 147 306 A1 discloses a spacer for supporting conductors in a stator arrangement of an electrical machine.
  • the spacer includes an insulating body formed of an electrically non-conductive material.
  • the body has an axially inner surface and an outer surface opposite the inner surface.
  • Phase connection pockets are formed in the spacer, through which phase connections of the stator arrangement are passed.
  • pockets are for one Neutral conductor provided in the spacer, in which axially outwardly projecting neutral conductor of the stator assembly are accommodated.
  • the neutral conductors forming a star point connection thus extend axially outwards over the end winding.
  • the stator arrangement, together with the spacer takes up a large amount of installation space in the axial direction.
  • the invention is therefore based on the object of specifying an improved possibility, in particular one that saves installation space, for insulating a stator winding.
  • an insulation device of the type mentioned at the outset which further comprises an insulation arrangement which has a first section which extends from the first side of the body in a direction pointing away from the second side and is set up to to surround the end winding along its circumference on one of two radial sides of the end winding.
  • the body has a first side configured to extend circumferentially at least partially beyond an axial end of the end turn.
  • the body has a second side, which is arranged opposite the first side and on which the connection elements can be arranged.
  • the body has at least one recess which extends from the first side to the second side and through which at least one of the connections can be passed from the first side in order to be electrically conductively connected to one of the connection elements on the second side .
  • the isolation device also has an isolation arrangement.
  • the insulation arrangement has a first section. The first portion extends from the first side of the body in a direction away from the second side. The first section is for that set up to surround the end winding along its circumference on one of two radial sides of the end winding.
  • the insulation device makes it possible through the insulation arrangement with its first section to electrically insulate the winding overhang from other objects that are arranged on the radial side of the winding overhang.
  • the fact that the object does not have to be arranged at the axial end of the end winding saves installation space. Greater degrees of freedom are thus achieved in the configuration of a stator having the stator winding, because the object arranged on the radial side can be arranged close to the radial side of the end winding due to the insulation effect provided by the first section.
  • the first section of the insulation arrangement ensures sufficiently large clearances and creepage distances between the end winding and the object.
  • the radial side is the radially inner side of the two sides of the end winding. This is particularly advantageous because the installation space in a stator for an internal rotor is particularly tight radially on the inside and can be used efficiently as a result of the insulating effect.
  • the radial side can also be the radially outer side of the two sides of the end winding.
  • a winding overhang is to be understood, in particular, as meaning those sections of the stator winding which protrude from the stator core at an end face thereof and assume an essentially hollow-cylindrical shape there.
  • the terms "radial”, “axial” and “circumference” refer to the hollow-cylindrical design of the end winding.
  • the isolation device is preferably formed from an electrically insulating plastic.
  • the body is preferably flat on the first side and/or on the second side.
  • the insulation arrangement has a second section, which extends from the first side of the body in the direction pointing away from the second side, and is set up to have a section arranged on the radial side of the end winding first star-point connection for the stator winding on the side facing away from the end winding of the first star-point connection, so that the first section and the second section surround the first star-point connection on both sides.
  • the first star point connection can be electrically insulated on both sides and thus arranged in a space-saving manner on the radial side of the end winding.
  • an arrangement of the first star point connection that increases the axial extent of the stator, in particular, can be dispensed with beyond the axial end of the end winding and installation space can be saved.
  • the insulation arrangement has a third section, which extends, in particular concentrically to the first section, from the first side of the body in the direction pointing away from the second side, and is set up to To surround the end winding along its circumference on the radial side or the other ren of the radial sides of the end winding.
  • a further object can be arranged in a manner analogous to the first object on the other radial side of the end winding, electrically isolated from the latter.
  • the insulation arrangement has a fourth section, which extends from the first side of the body in the direction pointing away from the second side of the body, and is set up to have one on the radial side of the end winding , which is surrounded by the third section, to surround arranged second star point connection for the stator winding on the side of the second star point connection facing away from the end winding, so that the third section and the fourth section surround the second star point connection on both sides.
  • the second star point connection can be electrically insulated on both sides and corresponding installation space can be saved.
  • the insulation arrangement can have a fifth section, which extends from the first side of the body in the direction pointing away from the second side of the body, extends together with the first section along an arc of a circle and is set up to close the end winding surround.
  • the insulation arrangement can have a sixth section, which extends from the first side of the body in the direction pointing away from the second side of the body, extends together with the third section along an arc of a circle and is set up to to surround the winding head.
  • the fifth section and the sixth section serve to mechanically stabilize the arrangement of the iso lation device on the end winding.
  • the insulation arrangement also has a connecting section which adjoins the first section and extends along a plane parallel to the body, and a second section which points away from the connecting section concentrically with the first section extends, wherein the second section is set up to surround a first star-point connection for the stator winding, which is arranged on the radial side of the winding overhang, on the side of the first star-point connection facing away from the winding overhang, so that the first section and the second section cover the first Star point connection surrounded on both sides.
  • the insulation arrangement also has a connecting section which adjoins the third section and extends along a plane parallel to the body, and a fourth section which extends concentrically with the third section, pointing away from the connecting section. comprises, wherein the fourth section is adapted to a on the radial side of the end winding, which is surrounded by the third section, arranged second To surround the star connection for the stator winding, so that the third section and the fourth section, the second star connection ben on both sides.
  • the or a respective connection section has through-openings, through which star-point connections of the stator winding can be passed.
  • the star point connections or the sections of the insulation arrangement surrounding them are preferably provided on different radial sides of the end winding.
  • the first and the second section or the third and the fourth section can accommodate and position the respective star point connection.
  • the respective star point connection can thus be inserted into the insulation device before the insulation device is placed on the end winding. If the star-point connections are placed in the insulation device and are then placed together on the winding overhang, production costs can be saved as a result. Due to the fact that in the alternative configuration the star point connection and the end sections to be connected to it—explained in more detail below—are not covered, electrically conductive fastening, in particular by means of welding, can take place after the insulation device has been put on. The fastening of the connecting elements and the star point connections can then advantageously be carried out in one step.
  • a respective section of the insulation arrangement preferably has the shape of a straight cylinder with an approximately C-shaped, in particular sector-shaped circular ring, base area.
  • a lateral surface of the straight cylinder points in particular towards the end winding.
  • a base of the straight cylinder rests on the body, so that the straight cylinder protrudes from the body.
  • the body and the sections result in one or more U-profiles or a multiple U-profile.
  • the first side of the body extends from a first end of the body to a second end of the body, extending from the first end to extend to the second end along the axial end of the winding overhang in the circumferential direction of the winding overhang.
  • the body extends over at most 75%, preferably over at most 60%, particularly preferably over at most 50%, of the circumferential direction of the end winding.
  • the first section of the insulation arrangement can be provided at the first end of the body.
  • the second portion of the iso lationsan extract may be provided at the first end of the body.
  • the third section of the insulation arrangement can be provided at the second end of the body.
  • the fifth section of the insulation arrangement can be provided at the second end of the body.
  • the fifth section of the insulation arrangement can be provided at the first end of the body.
  • a stator together with the insulation device, is often cast or coated with a flowable material, for example by being immersed in an immersion bath.
  • the through-opening allows the free-flowing material to penetrate more easily into the areas of the winding overhang covered by the body during immersion.
  • the through-opening also allows improved drainage of the free-flowing material after immersion in order to avoid massive accumulations of material between the insulation device and the winding head. By avoiding such accumulations, a more robust operation of the stator or of the electrical machine having it is possible.
  • the through openings may be located at locations where two of the sections of the insulation assembly are concentric with each other.
  • the through openings may also be located at locations where the first portion and the second portion of the insulation assembly are concentric with each other and/or a location where the third portion and the fourth Section of the insulation assembly run concentrically to each other. Since the second side of the body and the concentric sections delimit a free space into which the flowable material can only enter with difficulty, the through-opening allows particularly good wetting of the object held in the free space, in particular the star point connection.
  • the through-openings can also be arranged at locations at which the fifth section and the third section and/or the sixth section and the first section run concentrically to one another.
  • the through openings may also be located at locations midway between respective groups of four of the recesses of which a first recess and a second recess are at a first radial position, a third recess and a fourth recess are at a second radial position, the first Recess and the third recess are at a first circumferential position and the second and fourth recess are at a second circumferential position.
  • the body of the insulation device according to the invention has an arcuate, in particular arcuate, profile.
  • a respective section of the insulation arrangement can extend in the axial direction and in the circumferential direction with respect to the curved course.
  • the recesses are arranged on a first arc of a circle, which runs concentrically with the first section of the insulation arrangement.
  • a part of the recesses on a second circular arc which is concentric to and spaced from the first circular arc. running, is arranged.
  • This enables connections arranged at two different radial positions to be passed through the recess.
  • two recesses lying on both circular arcs are provided at three different angular positions of the circular arcs.
  • a respective recess has an edge with a projection directed into the recess.
  • a position of several connecting elements passed through a recess can be fixed by the projection.
  • a receiving space is formed for a respective connecting element on the second side of the body, which is set up to inhibit movement of the connecting element with respect to the second side in a state received in the receiving space.
  • the receiving space has one or more projections for inhibiting a rotational movement of the connection element about an axis of rotation perpendicular to the second side.
  • the receiving space has a projection for inhibiting a translational movement of the connection element along the second side.
  • the body has a further recess in which a sensor arranged on the end winding can be accommodated.
  • the senor for example a temperature sensor for determining the temperature of the end winding
  • the sensor can be securely positioned.
  • a stator for an electrical machine having a stator core, a stator winding which has a plurality of partial windings forming a winding overhang on an axial end face of the stator core and strands of the stator, each partial winding having an end section which encompasses a free end of the partial winding, protrudes from the end face of the stator core and forms a connection for one of the strands, a connection arrangement which has a number of connection elements corresponding to the number of strands, with each respective connection element holding the end sections of the partial windings connecting one of the strands, and an insulation device according to the invention for the electrical insulation of the end windings of the stator winding relative to the connection elements, the insulation device being arranged on the axial end of the end winding.
  • the first side of the body rests on the axial end of the winding head.
  • the first section preferably surrounds the end winding along its circumference.
  • the third section preferably surrounds the winding overhang on the radial side of the winding overhang opposite the first section.
  • each partial winding has a further end section, which encompasses another free end of the partial winding, protrudes from the front side of the stator core and forms a star point connection of the partial winding. It is preferably provided that the end sections of a part of the partial windings that form the star point extend on an inner radial side of the end winding and the stator also has a first star point connection, in particular designed as an arc-shaped busbar, through which the end sections of the part that form the star point connection of the partial windings connected to each other are.
  • the end sections of some of the partial windings that form the star point connection extend on an outer radial side of the end winding, with the stator also having a second star point connection, designed in particular as an arcuate busbar, through which the den Star point connection forming Endab sections of the part of the partial windings are connected to each other.
  • the first section and the second section preferably surround the first star point connection on both sides.
  • the third section and the fourth section preferably surround the second star point connection on both sides.
  • the first end section of a respective partial winding protrudes from the stator core at a predetermined angular position in its circumferential direction and extends radially from the end winding in a direction pointing in the axial direction.
  • the second end section of a respective partial winding protrudes from the stator core at a predetermined angular position in a circumferential direction thereof and extends radially away from the end winding in the axial direction.
  • the second end section of a respective partial winding preferably occupies a greater radial distance from the end winding than the first end section.
  • first end sections are axially longer than the second end sections.
  • the first end sections preferably extend beyond the axial end of the end winding.
  • the second end sections preferably do not extend beyond the axial end of the end winding.
  • the stator can also have a sensor.
  • the sensor is preferably accommodated in the further recess, so that its projection guides the sensor.
  • the sensor is preferably a temperature sensor that is set up to detect a temperature at the end winding.
  • a multiplicity of slots arranged in the circumferential direction can be formed in the stator core.
  • the stator winding is arranged in sections from the slots.
  • each partial winding can have a plurality of form conductors which extend through the stator core along an axial direction.
  • a stator winding is also referred to as a hairpin winding.
  • the shaped conductors have an essentially rectangular cross section and are in particular not limp.
  • the shaped conductors are preferably accommodated in a predetermined number of radially arranged layers of a respective slot in the stator core.
  • the shaped conductors directly adjoining the end sections are preferably accommodated in radially first and/or radially last layers of a groove.
  • the end sections of a respective partial winding and the form conductor of the partial winding are preferably arranged offset in parallel.
  • an electrical machine for driving a vehicle having a stator according to the invention and a rotor which is rotatably mounted within the stator.
  • the electric machine according to the invention is preferably set up to drive a vehicle. In this respect, it can be set up to form part of a drive train of the vehicle.
  • the electrical machine is preferably in the form of a synchronous machine, in particular a permanently excited one. Alternatively, the electrical machine can be designed as an asynchronous machine.
  • the object on which the invention is based is also achieved by a driving tool having an electric machine according to the invention, which is designed to drive the vehicle.
  • the vehicle may be a battery electric vehicle (BEV) or a flybrid vehicle.
  • the insulation arrangement can have a connecting section adjoining the first section, which extends along a plane parallel to the body, and a second section, which extends away from the connecting section concentrically with the first section, having the second Section is set up to surround a first star-point connection for the stator winding arranged on the radial side of the winding overhang on the side of the first star-point connection facing away from the winding overhang, so that the first section and the second section surround the first star-point connection on both sides and thus separate them from the winding overhang isolate.
  • the star point connection can be designed as a star point rail.
  • the star point rail can be placed on the connection section when assembling the stator and can be connected to the end sections, which protrude through the connection section, without additional flattening.
  • the connecting section has through-openings through which the star-point connections of the stator winding or the end sections can be passed. In this way, the star point bar can be connected to the end sections, for example by welding.
  • Fig. 1 is a perspective view of a first embodiment of the stator according to the invention with a first gameticiansbei the isolation device according to the invention
  • Fig. 2 is a perspective view of the stator core and the stator winding
  • FIG. 3 is a plan view of the stator core and stator winding
  • Fig. 4 is a side detail view of the stator core and the stator winding
  • Fig. 5 is a sectional detail view of the stator core and the stator winding
  • Fig. 6 is a perspective detail view of the stator core with the stator winding and two star connections;
  • FIG. 7 shows a detailed side view of the stator core and the stator winding with one of the star point connections
  • Fig. 8 is a sectional detail view of the stator core with the stator winding and the star point connection;
  • FIG. 9 is a perspective view of the first embodiment of FIG.
  • Fig. 10 is a plan view of the first embodiment of the isolation device on the first side
  • Fig. 11 is a plan view of the second side of the firstdicasbei game isolation device
  • FIG. 12 is a perspective view of the first embodiment of FIG.
  • Isolation device in a state arranged on the stator winding; 13 shows a sectional detail view of the first exemplary embodiment of the stator;
  • Fig. 16 is a schematic diagram of an embodiment of a vehicle with an embodiment of the electrical machine according to the invention.
  • Fig. 1 is a perspective view of a first embodiment of a Sta tor 1 with a first embodiment of an isolation device 2.
  • the stator has a stator core 3 , a stator winding 4 and a connection arrangement 5 .
  • the stator core 3 is formed, for example, from a laminated core with a multiplicity of axially layered individual laminates. In the axial direction, a large number of slots 3a arranged one after the other in the circumferential direction of the stator 1, 48 in the present example, penetrate the stator core 3.
  • the stator winding 4 has a plurality of partial windings which form a winding overhang 7 on an axial end face 6a of the stator core 3 .
  • the partial windings form a plurality of strands or phase windings, in the present example three strands or phase windings.
  • each strand is formed by four parallel partial windings.
  • connection arrangement 5 has a number of connection elements 8a, 8b, 8c corresponding to the number of strands.
  • Each connection element is used electrical supply of one of the strands and can be connected to an inverter, for example.
  • FIG. 2 to 5 show the stator core 3 and the stator windings 4, wherein FIG. 2 is a perspective view, FIG. 3 is a plan view of the end face 6a, FIG. 4 is a detailed side view, and FIG. 5 is a detailed sectional view is.
  • Each partial winding has a first end section 9a, 9b, 9c, 9d, which comprises a free end of the partial windings.
  • the first end sections 9a to 9d protrude from the stator core 3 at the end face 6a and form a connection of one of the strands.
  • the first end portions 9a, 9b of a part of the partial windings extend in the axial direction along the radially outer side of the end winding 7 and the first end portions 9c, 9d of another part of the partial windings extend in the axial direction along the radially inner side of the end winding 7.
  • Each Connection element 8a, 8b, 8c (see FIG. 1) is electrically conductively connected to the end sections 9a to 9d of the partial windings forming one of the strands.
  • each partial winding has a second end section 10a, 10b, 10c, 10d, which encompasses the other free end of the partial windings and protrudes from the stator core 3 at the end face 6a.
  • End sections 10a, 10b, 10c, 10d which encompasses the other free end of the partial windings and protrudes from the stator core 3 at the end face 6a.
  • stator core 3 and stator winding 4 show the stator core 3 and stator winding 4 as well as a first star point connection 11 and a second star point connection 12 of the stator
  • FIG. 6 is a perspective detailed view with the star point connections
  • FIG. 7 is a detailed side view with the second neutral point connections 12 and FIG. 8 is a detailed sectional view with the neutral point connections 11, 12.
  • the second end sections 10a, 10b of the partial windings which extend radially inward along the end winding 7, form a first star point connection of the corresponding partial windings and are electrically conductively connected to the first star point connection 11.
  • the second end sections 10c, 10d of the partial windings which extend radially outward along the end winding 7, form a second star point connection of the corresponding partial windings and are electrically conductively connected to the second star point connection 12.
  • the star-point connections 11, 12 are designed here as curved busbars, to which the corresponding second end sections 10a, 10b or 10c, 10d are fastened in an electrically conductive manner.
  • Fig. 9 is a perspective view of the first embodiment of the isolation device 2.
  • the insulation device 2 serves to electrically insulate the end winding 7 from the connection elements 8a, 8b, 8c for the connections 9a to 9d of the stator winding 4.
  • the insulation device 2 has a plate-shaped body 20.
  • a first side 21 of the body 20 is configured to extend at least partially over an axial end of the end winding 7 in the circumferential direction.
  • a second side 22 of the body 20 is located opposite the first side 21 .
  • the connecting elements 8a, 8b, 8c can be arranged on the second side 22.
  • the body 20 has a plurality of recesses 23a, 23b which extend from the first side 21 to the second side 22.
  • the connections formed by the first end sections 9a to 9d can be passed through the recesses 23a, 23b from the first side in order to be electrically conductively connected to one of the connection elements 8a, 8b, 8c on the second side 22.
  • the recesses 23a lie on a first arc of a circle and the recesses 23b on a second arc of a circle which is arranged concentrically to the first arc of a circle and lies radially further inwards than the first arc of a circle.
  • the radially outer first end sections 9a, 9b can be passed through the radially outer recesses 23a and the radially inner first end sections 9c, 9d through the radially inner recesses 23b.
  • FIG. 10 and 11 show the isolation device 2, wherein FIG. 10 is a top view of the first side 21 and FIG. 11 is a top view of the second side 22.
  • FIG. 10 is a top view of the first side 21 and FIG. 11 is a top view of the second side 22.
  • FIG. 10 is a top view of the first side 21 and FIG. 11 is a top view of the second side 22.
  • the device 2 also has an insulation arrangement 24 .
  • the isolation assembly 24 includes a first portion 25a extending from the first side 21 in a direction away from the second side 22 .
  • the first section 25a is set up to surround the end winding 7 along its circumference on the radially inner side of the end winding 7 .
  • the insulation assembly 24 has a second portion 25b which also extends from the first side 21 of the body 20 in the direction away from the second side 22 .
  • the second section 25b is designed to surround the first star-point connection 11 arranged on the radially inner side of the end winding 7 on the side of the first star-point connection 11 facing away from the end winding 7, so that the first section 25a and the second section 25b form the first star-point connection 11 can be surrounded on both sides.
  • the insulation assembly 24 further includes a third portion 25c extending from the first side 21 of the body 20 in the direction away from the second side 22 .
  • the third section 25c is designed to surround the end winding 7 along its circumference on the outer radial side of the end winding 7 .
  • the insulation arrangement has a fourth section 25d, which extends from the first side 21 of the body 20 into that from the second side 22 of the Body 20 extends pioneering direction.
  • the fourth section 25d is designed to surround the second star-point connection 12 arranged on the radially outer side of the end winding 7 on the side of the second star-point connection 12 facing away from the end winding 7, so that the third section 25c and the fourth section 25d form the second star-point connection 12 surrounded on both sides.
  • a fifth section 25e and a sixth section 25f are provided, which do not surround the star point connections 11, 12 and extend on the same circular arc as the first section 25a and the third section 25c.
  • the fifth section 25e and the sixth section 25f serve not only to insulate the end winding 7 from its radial interior and exterior, but also to ensure the mechanically stable arrangement of the insulation device 2 on the end winding 7.
  • the sections 25a to 25f of the insulation arrangement 24 extend concentrically to one another and are designed in the shape of a circular arc. In the present exemplary embodiment, they are perpendicular to the body 20.
  • the first section 25a and the second section 25b and the sixth section 25f are arranged at a first end 29a of the body 20 .
  • the third section 25c, the fourth section 25d and the fifth section 25e are arranged at a second end 29b of the body 20 opposite the first end 29a.
  • each recess 23a, 23b has an edge 30 with a projection 31 directed into the recess 23a, 23b.
  • the body 20 has three through holes 32a, which are arranged in areas where the first section 25a and the second section 25b extend concentrically with each other.
  • three through holes 32b are provided in areas of the body 20 where the third portion 25c and the fourth portion 25d extend concentrically with each other.
  • openings 32c are provided centrally between respective groups of four of the recesses 23a, 23b, of which a first recess 23a and a second recess 23a lie at a first radial position, a third recess 23b and a fourth recess 23b lie at a second radial position, the first recess 23a and the third recess 23b lie at a first angular position in the circumferential direction and the second 23a and the fourth recess 23b lie at a second angular position in the circumferential direction.
  • through openings 32d are provided in the areas in which the first section 25a and the sixth section 25f and the third section 25c from and the fifth section 25e of the insulation arrangement 24 run concentrically with one another.
  • the body 20 has a further recess 33a, in which a sensor 13 arranged on the end winding 7 (see FIG. 1) can be accommodated.
  • a projection 33b (see FIG. 9) for guiding the sensor 13 is formed on the second side 22 along an edge contour of the recess 33a.
  • a receiving space 34a, 34b, 34c is formed on the second side 22 of the body 20 in the insulation device 2 for a respective connection element 8a, 8b, 8c.
  • Each receiving space 34a, 34b, 34c is designed to lift a movement of the connecting element 8a, 8b, 8c with respect to the second side 22 in a received state in the receiving space 34a, 34b, 34c.
  • Each receiving space 34a, 34b, 34c has two projections 35a, 35b for clamping a rotary movement of the connection element 8a, 8b, 8c about an axis of rotation perpendicular to the second side 22.
  • a projection 35b for clamping a translational movement of the connecting element 8a, 8b, 8c along the second side 22 is provided at each receiving space 34a, 34b, 34c.
  • the insulating device 2 is made of an electrically insulating material, for example a plastic. 12 is a perspective view of the insulation device 2 in a state fitted to the stator coils 4 .
  • the connecting element 8b is received in the receiving space 34b and is prevented from rotating and translational movements by the projections 35a, 35b.
  • the projection 35b protrudes into an opposite recess of the connection element 8b.
  • the first end portions 9a to 9d penetrate the recesses 23a, 23b, each recess 23a, 23b receiving a pair of circumferentially adjacent end portions 9a to 9d located at the same radial position.
  • FIG. 13 is a sectional detailed view of the stator 1 , in which it can be seen that the insulation device 2 rests with its first side 21 on the axial end of the end winding 7 . Also visible is the sensor 13, which is guided by means of the projection 33b in such a way that it can detect a temperature of the end winding 7.
  • the stator winding 4 is formed from a large number of shaped conductors 36 .
  • the form conductors 36 are made of bent metal rods, preferably made of copper.
  • the form conductor 36 extend within the grooves 3a from the end face 6a to its axially opposite end face 6b.
  • Such a stator winding can also be referred to as a hair pin winding.
  • the end sections 9a to 9d, 10a to 10d are formed in one piece with a respective form conductor 36 of a partial winding.
  • the remaining form conductors 36 of the partial windings are connected in pairs on the end face 6a by connections formed in one piece with them.
  • the shaped conductors 36 are bonded together in pairs.
  • FIG. 14 and 15 are each a schematic diagram of a sectional view of a second exemplary embodiment of a stator 1 and a second exemplary embodiment of the insulation device 2. All statements relating to the exemplary embodiment described above can be transferred to the second exemplary embodiment, with the same or equivalent components being included are provided with identical reference symbols.
  • the insulation arrangement 24 in the second exemplary embodiment has a connecting section 25g which is connected to the first section 25a and which extends along a plane lying parallel to the body 20.
  • FIG. The second portion 25b extends from the connec tion portion 25g pioneeringly concentric with the first portion 25a.
  • the second section 25b is set up to surround the first star point connection 11 on the side of the first star point connection 11 facing away from the end winding 7, so that the first section 25a and the second section 25b surround the first star point connection 11 on both sides.
  • the connecting section 25g has through-openings 37a, through which star-point connections of the stator winding 4 or the end sections 10a, 10b can be passed.
  • the insulation arrangement 24 in the second exemplary embodiment also has a connecting section 25h which follows the third section 25c and extends along a plane lying parallel to the body 20.
  • the fourth section 25d extends away from the connecting section 25h concentrically with the third section 25c.
  • the fourth section 25d is set up to surround the second star point connection 12 on the side of the second star point connection 12 facing away from the end winding 7, so that the third section 25c and the fourth section 25d surround the second star point connection 12 on both sides.
  • the connecting section 25h has through-openings 37b, through which star-point connections of the stator winding 4 or the end sections 10c, 10d can be passed.
  • first section and the second section correspond to the first embodiment and the third section and the fourth section correspond to the second embodiment.
  • first section and the second section correspond to the second embodiment and the third section and the fourth section correspond to the first embodiment.
  • 16 is a schematic diagram of an embodiment of a vehicle 100 with an embodiment of an electric machine 101.
  • the electric machine 101 is set up to drive the vehicle 100 and has a stator 1 according to one of the exemplary embodiments described above and a rotor 102 rotatably mounted within the stator 1 .
  • the electrical machine 101 is designed, for example, as an asynchronous machine or as a permanently excited synchronous machine.
  • the electric machine 101 forms part of a drive train of the vehicle 100 .
  • the vehicle 100 may be a battery electric vehicle (BEV) or a fly-brid vehicle.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

Dispositif d'isolation (2) pour l'isolation électrique d'une tête d'enroulement 7) d'un enroulement de stator (4) vis-à-vis d'éléments de connexion (8a-c), le dispositif d'isolation (2) comprenant un corps en forme de plaque (20) qui présente un premier côté (21), un deuxième côté (22) disposé à l'opposé du premier côté (1), et au moins un évidement (23a, 23b) qui s'étend du premier côté (21) au deuxième côté (22) et à travers lequel au moins une des connexions peut passer depuis le premier côté (21). Selon l'invention, il est prévu un ensemble d'isolation (24) qui présente une première partie (25a, 25b) qui s'étend, depuis le premier côté (21) du corps (20), dans un sens opposé au deuxième côté (22).
PCT/EP2022/058506 2021-03-30 2022-03-30 Dispositif d'isolation, stator et machine électrique WO2022207763A1 (fr)

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DE102021203210.9A DE102021203210A1 (de) 2021-03-30 2021-03-30 Isolationsvorrichtung, Stator und elektrische Maschine
DE102021203210.9 2021-03-30

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WO2022207763A1 true WO2022207763A1 (fr) 2022-10-06

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022213076A1 (de) * 2022-12-05 2024-06-06 Zf Friedrichshafen Ag Elektrische Maschine

Citations (5)

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Publication number Priority date Publication date Assignee Title
US20130147306A1 (en) 2011-12-07 2013-06-13 Remy Technologies, L.L.C. Spacer For Supporting Conductors In An Electric Machine
US20160308413A1 (en) * 2015-04-16 2016-10-20 MAGNETI MARELLI S.p.A. Electric machine having a stator winding with rigid bars
US20190149003A1 (en) * 2016-05-11 2019-05-16 Hitachi Automotive Systems, Ltd. Rotary Electric Machine
EP3567703A1 (fr) * 2018-05-09 2019-11-13 Volkswagen Aktiengesellschaft Stator pour une machine électrique et procédé de fabrication
US20200368969A1 (en) * 2019-05-23 2020-11-26 GM Global Technology Operations LLC Hybrid additive manufacturing assisted prototyping

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2780828B1 (fr) 1998-07-02 2000-09-29 Valeo Equip Electr Moteur Alternateur de vehicule ayant un enroulement isole du carter
JP6994627B2 (ja) 2016-11-28 2022-01-14 パナソニックＩｐマネジメント株式会社 モータ
DE102018203993A1 (de) 2018-03-15 2019-09-19 Zf Friedrichshafen Ag Isoliereinheit für eine elektrische Maschine
JP2020018144A (ja) 2018-07-27 2020-01-30 日本電産トーソク株式会社 ステータユニット、および電動アクチュエータ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130147306A1 (en) 2011-12-07 2013-06-13 Remy Technologies, L.L.C. Spacer For Supporting Conductors In An Electric Machine
US20160308413A1 (en) * 2015-04-16 2016-10-20 MAGNETI MARELLI S.p.A. Electric machine having a stator winding with rigid bars
US20190149003A1 (en) * 2016-05-11 2019-05-16 Hitachi Automotive Systems, Ltd. Rotary Electric Machine
EP3567703A1 (fr) * 2018-05-09 2019-11-13 Volkswagen Aktiengesellschaft Stator pour une machine électrique et procédé de fabrication
US20200368969A1 (en) * 2019-05-23 2020-11-26 GM Global Technology Operations LLC Hybrid additive manufacturing assisted prototyping

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