DE102022118409A1 - Electrical lamination stack arrangement, stator lamination stack arrangement and stator device for an electrical machine, electric machine and motor vehicle - Google Patents

Abstract

Electrical lamination stack arrangement for an electrical machine, wherein the electrical lamination stack arrangement comprises the following: an electrical lamination stack (100) which comprises electrical laminations (128) and in which adjacent electrical laminations (128) are connected via composite layers (130), a separating element (112) and optionally an electrical lamination stack carrier (108), wherein the separating element (112) is arranged on a surface (116) of the electrical lamination stack (100) and/or on a surface (114) of the electrical lamination stack carrier (108).

Description

The present invention relates to the field of electrical machines and in particular to stators for electrical machines, e.g. B. for electric motors.

Electric machines are increasingly being used to drive motor vehicles. The term motor vehicle includes land motor vehicles, air motor vehicles and water motor vehicles. Land motor vehicles include road motor vehicles and rail motor vehicles. Road motor vehicles include in particular passenger cars and trucks.

Electric machines are increasingly being used to drive road vehicles. There is a great need to use the electrical energy stored on board the vehicle as efficiently as possible and thus ultimately contribute to increasing the vehicle's range.

Electric machines include stators and rotors. Typical stators and rotors each include electrical laminations. The electrical sheet packages each include electrical sheets. In the electrical lamination stacks, adjacent electrical laminations are connected via composite layers. Composite layers can, for example, be baked lacquer layers, which are familiar to experts in the technical field of electrical machines.

Alternatively, electrical laminations of rotors or stators can be manufactured using welding or mechanical fasteners (rivets, screws, bolts and/or clinch points).

Known baking varnishes are often not very elastic after curing.

The present invention is based on the object of providing an efficient electrical machine, in particular for driving a motor vehicle, and components for such an electrical machine with little effort.

The object is achieved according to the invention by the features of claim 1.

In the electrical lamination stack, adjacent electrical laminations are connected via composite layers. The electrical lamination stack can preferably comprise a plurality of electrical laminations, with a composite layer being arranged between two adjacent electrical laminations.

The term composite layer refers to a layer that connects the two adjacent electrical sheets between which the composite layer is arranged.

The electrical sheet thickness is not limited. Preferred electrical sheets are each at least 0.03 mm, in particular at least 0.06 mm, for example at least 0.10 mm thick. Preferred electrical sheets are at most 0.60 mm thick, in particular at most 0.50 mm thick, for example at most 0.35 mm thick. Particularly preferred electrical sheets are 0.03 to 0.60 mm thick, in particular 0.06 to 0.50 mm thick, for example 0.10 to 0.35 mm thick. The information on thickness can preferably apply to a majority of the electrical sheets, in particular to all electrical sheets of the electrical sheet stack.

Optionally, the electrical lamination stack arrangement can include an electrical lamination stack carrier. Preferably, the electrical lamination stack arrangement does not include an electrical lamination stack carrier.

The separating element can be arranged on a surface of the electrical laminated core and/or on a surface of the electrical laminated core carrier.

This can mean in particular that the separating element is arranged on a surface of the electrical lamination stack. This is particularly preferred.

Alternatively, the separating element can be arranged on a surface of the electrical laminated core carrier.

The separating element can be arranged on a surface of the electrical laminated core and on a surface of the electrical laminated core carrier. The separating element can be arranged, for example, between the electrical laminated core and the electrical laminated core carrier.

The electrical lamination stack can advantageously comprise a front surface of the electrical lamination stack and a shell-side surface of the electrical lamination stack.

The electrical lamination stack carrier can advantageously comprise a front surface of the electrical lamination stack carrier and a shell-side surface of the electrical lamination stack carrier.

The designations front and shell side refer to the assembled state of the electrical machine.

The electrical machine has an axis of rotation.

A front surface can in particular be axially aligned.

A shell-side surface can in particular be aligned radially.

In particular in the case of an electrical laminated core that has an electrical laminated core recess which, for. B. can serve to accommodate a rotor, the electrical lamination stack can have an internal shell-side surface and an external shell-side surface. The inner shell-side surface can surround the electrical lamination stack recess and face the axis of rotation. The external shell-side surface can limit the electrical lamination stack in the radial direction to the outside.

The separating element can be arranged on the surface of the electrical lamination stack and/or on the surface of the electrical lamination stack carrier, preferably on the surface of the electrical lamination stack, for example in such a way that the separating element at least partially separates two spaces from one another. In the electrical lamination stack arrangement, the spaces can be open to the outside, particularly in the radial direction.

It can be advantageous if the separating element extends along the surface of the electrical lamination stack and/or along the surface of the electrical lamination stack carrier, preferably along the surface of the electrical lamination stack. This can mean that a temperature control fluid can be guided directly on the surface of the electrical laminated core along the separating element through a space that is at least partially separated from another space by the separating element.

“Temperature” can preferably mean “cool” in connection with the invention.

The temperature control fluid can preferably be a cooling fluid. Because there is typically a need for cooling electrical machines.

In connection with the invention, temperature control fluid can preferably be temperature control liquid, e.g. B. coolant. The temperature control liquid can contain gaseous components, especially if the temperature control liquid is hot.

The heat transfer liquid can be watery. Alternatively, the heat transfer fluid can be a non-electrically conductive heat transfer fluid.

The separating element can support the surface of the electrical lamination stack and/or the surface of the electrical lamination stack carrier, preferably the surface of the electrical lamination stack, against a further device element of an electrical machine that can be produced with the electrical lamination stack arrangement. The separating element then functions as a separating support element. At least one of the spaces can be covered radially outwards by the further device element.

A support of the surface against another device element can be effected solely or partially by the separating element.

The support of the surface against the further device element is preferably only partially effected by the separating element. The support of the surface against the further device element can be effected in particular by one or more anti-rotation elements that are different from the separating element.

The surface supported against a further device element can preferably be a front surface of the electrical lamination stack or the electrical lamination stack carrier, e.g. B. be a front surface of the electrical sheet metal package. The surface supported against a further device element can preferably be a shell-side surface of the electrical lamination stack or the electrical lamination stack carrier, e.g. B. a shell-side surface of the electrical lamination stack.

The separating element can advantageously have a radially inwardly oriented separating element inner surface and/or a radially inwardly oriented separating element inner edge. This can mean in particular that the separating element can have a radially inwardly oriented separating element inner surface and that the separating element can alternatively or additionally have an inwardly oriented separating element inner edge.

The separating element inner surface and/or the separating element inner edge, preferably the separating element inner surface, can preferably extend along a shell-side surface of the electrical lamination stack or the electrical lamination stack carrier, preferably of the electrical lamination stack.

An extension direction of at least part of the separating element inner surface and/or the separating element inner edge in the shell-side surface can preferably be inclined or orthogonal to an axis of rotation defined by the electrical lamination stack arrangement.

The axis of rotation defined by the electrical lamination stack arrangement corresponds to the rotation axis of an electrical machine for which the electrical lamination stack arrangement can be used.

It can be particularly preferred if an extension direction of at least part of the separating element inner surface and/or the separating element inner edge in the shell-side surface is inclined to the axis of rotation.

In the case of an annular separating element, the direction of extension can in particular be orthogonal to the axis of rotation.

In the case of a separating element that runs continuously in a spiral shape, the direction of extension is inclined to the axis of rotation over the entire length of the separating element.

In the case of a spiral-shaped separating element, two spaces adjacent to a section of the separating element are at least partially separated from one another by the section of the separating element. However, these two spaces are connected to one another in a spiral-shaped circumferential manner, since they represent two areas of a spiral-shaped temperature control channel, the temperature control channel being defined by the spiral-shaped separating element and the shell-side surface.

The temperature control channel can preferably be a cooling channel.

The inclination of an extension direction of a first part of the separating element to the axis of rotation can preferably be different than an inclination of an extension direction of a second part of the separating element to the axis of rotation. This can be particularly advantageous because it enables a change in direction of a temperature control channel running along the separating element in the shell-side surface. This allows, in particular, a meandering guidance of the temperature control fluid in the shell-side surface.

It can be particularly advantageous if the inclination of the first part of the separating element is opposite to the inclination of the second part of the separating element.

It can be advantageous if the separating element is positioned in a desired separating element position by at least one positioning element. The positioning element can be a depression.

It can be particularly advantageous if the separating element is a sealing element. This can cause the separating element to separate the two spaces from one another in a substantially fluid-tight manner.

It can be particularly advantageous if the spaces at least partially separated from one another by the separating element are intended for different fluids, e.g. B. a temperature control fluid in one of the rooms and air in another of the rooms, and the separating element is a sealing element. A leakage of fluid via the separating element from one space to the other is then undesirable, so that the sealing effect of the sealing element is particularly advantageous.

The sealing element can be, for example, a sealing ring.

It can be particularly advantageous if the sealing element consists entirely or partially of a metal. The surface of the metal can be completely or partially coated with an electrically insulating material. It can be particularly advantageous if the electrically insulating material is arranged between the surface of the metal and the surface of the electrical lamination stack.

This can have the effect of reducing eddy current losses that would occur without the electrically insulating material. The efficiency of an electrical machine that is available using the electrical lamination stack arrangement can thereby be further increased. A further reduction in eddy currents can be achieved in particular by using poorly conductive stainless steels, in particular austenitic stainless steels.

The electrically insulating material may contain an elastomer. This can have the additional advantage that the sealing effect can be increased.

It can be advantageous if the separating element is a spring element or comprises a spring element. The spring element can preferably be a spring washer or a spring ring.

The spring element can advantageously consist of a flat material or comprise a flat material. The spring element can preferably consist of a metal flat material or comprise a metal flat material. The spring element can z. B. consist of a metal sheet or include a metal sheet.

The metal flat material can be the metal from which the sealing element is made entirely or partially.

The term metal used herein also includes metal alloys. The metal can be, for example, iron, aluminum, copper, nickel, cobalt or titanium or contain one or more of these metals. Preferably, the metal is a magnetizable metal and/or a metal that conducts electricity well.

In particular, steel can be provided as the metal, e.g. B. a spring steel or a stainless steel, especially an austenitic stainless steel.

The iron can e.g. B. be an iron alloy.
The aluminum can e.g. B. be an aluminum alloy.
The copper can e.g. B. be a copper alloy.
The titanium can e.g. B. be a titanium alloy.
The cobalt can e.g. B. be a cobalt alloy.
The nickel can e.g. B. be a nickel alloy.

The separating element can be profiled.

The separating element can be a sealing element and a spring element or can be a sealing element and include the spring element.

The separating element, which is preferably a spring element or comprises a spring element and which can be, for example, a sealing element, can comprise a plurality of legs. The legs can in particular be legs that can be seen in the profile cross section of the separating element.

It can be particularly advantageous if one leg of the separating element is arranged on the surface of the electrical lamination stack and/or on the surface of the electrical lamination stack carrier, preferably on the surface of the electrical lamination stack.

A second leg of the separating element can advantageously be spaced from the surface of the electrical lamination stack and/or from the surface of the electrical lamination stack carrier, preferably from the surface of the electrical lamination stack.

The separating element can preferably comprise a leg connection area from which legs, for example the two legs, can extend.

The separating element can e.g. B. have a C-shaped, U-shaped, V-shaped, N-shaped and / or W-shaped profile cross section.

The separating element preferably has a C-shaped, U-shaped and/or V-shaped profile cross section. This can be particularly advantageous since a smaller number of legs can promote a laminar flow of a temperature control fluid that can be guided along the separating element. This allows the efficiency of electrical machines to be increased. Because for the operation of a temperature control pump, e.g. B. coolant pump, less energy is then required. Ultimately, particularly low production costs can be achieved and the range of a motor vehicle can be further increased.

In the case of a C-shaped, U-shaped and V-shaped profile cross section, two legs each extend from a leg connection area.

With an N-shaped profile cross section, three legs extend from two leg connection areas.

With a W-shaped profile cross section, four legs extend from three leg connection areas.

Each leg connection area can be elastic.

The number of legs that the separating element comprises is preferably two. These can extend from a leg connection area.

It can be advantageous if the separating element comprises several legs that merge into one another in the area of a bead.

It can be advantageous if the separating element comprises several legs that merge into one another in the area of a half bead.

The half bead or the bead can then represent the leg connection area.

The object is also achieved according to the invention by the stator laminated core arrangement with the features of claim 14.

The electrical lamination stack is preferably a stator lamination stack. The stator laminated core can preferably have an electrical laminated core recess for receiving a rotor.

The stator laminated core does not have to have an electrical laminated core recess to accommodate a rotor.

In particular, if the stator laminated core arrangement is intended for an electrical machine in the design of an external rotor, the electrical laminated core recess for receiving a rotor is unnecessary.

It can be advantageous if the separating element forms a fluid barrier that covers a space, e.g. B. a temperature control zone, which is z. B. can extend through the electrical laminated core or along a surface of the electrical laminated core, delimited from the electrical laminated core recess.

The temperature control zone can preferably be a cooling zone.

The room, e.g. B. the temperature control zone, preferably extends along a surface of the electrical lamination stack.

The room, e.g. B. the temperature control zone, can preferably be a temperature control channel or extend into a temperature control channel or through a temperature control channel.

It can be advantageous if the room, e.g. B. the temperature control zone, extends through the electrical sheet metal package.

It can be particularly advantageous if the electrical lamination stack arrangement or the stator lamination stack arrangement comprises a plurality of separating elements.

A separating element can be arranged offset in the axial direction from another separating element.

A separator can form a fluid barrier at one end of the space. Another separating element can form a fluid barrier at another end of the room.

The two ends of the room are preferred, e.g. B. the temperature control zone, offset from one another in the axial direction.

It can be advantageous if a section of a separating element forms a fluid barrier and another section of the same separating element forms a further fluid barrier. The portions of the separating element that form the fluid barriers may be spaced apart in the axial direction.

The sections of the separating element that form the fluid barriers can be a space, e.g. B. define a temperature control zone. The room, e.g. B. the temperature control zone, can then lie in particular between the sections of the separating element that form the fluid barriers. This would be e.g. B. conceivable with a spiral-shaped separating element.

If the electrical lamination stack arrangement or stator lamination stack arrangement comprises a plurality of separating elements, it can be advantageous if at least two separating elements are arranged on the shell-side surface of the electrical lamination stack.

If the electrical lamination stack arrangement or the stator lamination stack arrangement comprises a plurality of separating elements, it can be advantageous if at least one separating element is arranged on a front surface of the electrical lamination stack and another separating element is arranged on a shell-side surface of the electrical lamination stack.

If the electrical lamination stack arrangement or the stator lamination stack arrangement comprises a plurality of separating elements, it can be advantageous if at least one separating element is arranged on one front surface of the electrical lamination stack and at least one other separating element is arranged on another front surface of the electrical lamination stack.

At least one separating element included in the electrical lamination stack arrangement can have a wide edge and a narrow edge. The narrow edge and the wide edge of the separating element can be offset from one another in the axial direction.

An inside diameter of the separating element on the narrow edge can differ from the outside diameter of the separating element on the narrow edge to a lesser extent than an inside diameter of the separating element on the wide edge differs from the outside diameter of the separating element on the wide edge.

The profile cross section of the separating element can be thicker on the wide edge than on the narrow edge. The thickness of the profile cross section at its edges is measured in particular in the direction towards the axis of rotation.

The separating element can have spaced apart legs on the wide edge.

The separating element can have a leg connection area on the narrow edge.

It can be particularly advantageous if the separating element has the wider edge described herein and the narrower edge, since it is then possible to insert the separating element with the narrow edge first into a gap between a surface of the electrical lamination stack and a further device element, e.g. B. a housing to introduce.

If the electrical lamination stack arrangement or the stator lamination stack arrangement comprises several separating elements, it can be advantageous if the separating elements are oriented in the same direction. In the case of separating elements oriented in the same direction, in particular the narrow edge of both separating elements can be oriented in one direction and the wide edge of both separating elements can be oriented in another direction. The two directions mentioned can be opposite axial directions.

A particularly advantageous electrical lamination stack arrangement or stator lamination stack arrangement comprises a plurality of separating elements oriented in the same direction, which are spaced apart from one another and arranged on a shell-side surface of the electrical lamination stack.

A further particularly advantageous electrical lamination stack arrangement or stator lamination stack arrangement comprises a separating element, wherein several sections of the separating element are oriented in the same direction and are arranged at a distance from one another on a shell-side surface of the electrical lamination stack.

The object is also achieved according to the invention by the stator device with the features of claim 17.

The stator laminated core arrangement comprised by the stator device is preferably a stator laminated core arrangement which has an electrical laminated core recess for receiving a rotor.

The stator device comprises a further stator device element, in which the stator laminated core arrangement can be at least partially accommodated. The further stator device element can z. B. be a housing.

A room, e.g. B. a temperature control zone, between the stator laminated core and the further stator device element along a surface of the stator laminated core.

The further stator device element can z. B. be a housing part, in particular a housing cover, or a stator carrier.

The positioning element, which z. B. be a recess, can be on the further stator device element, e.g. B. on the housing cover. The separating element can be arranged at least partially in the recess.

Preferably the room, e.g. B. the temperature control zone, a space described herein in connection with the electrical laminated core arrangement or the stator laminated core arrangement or a temperature control zone described in this context. The room, e.g. B. the temperature control zone, can preferably be limited by at least one separating element, a surface of the stator laminated core and a surface of the further stator device element.

In particular, the separating element can be arranged between a surface of the stator laminated core and an inner surface of the further stator device element.

An inner surface of the further stator device element is understood to mean a surface of the further stator device element which faces the surface of the stator laminated core.

It can be advantageous if one leg of the separating element is arranged on a surface of the stator laminated core and another leg of the separating element is arranged on a surface of the further stator device element.

It can be advantageous if the separating element is arranged on a front surface of the stator laminated core, the separating element being a shrinkage compensator which is able to compensate for shrinkage of the stator laminated core that occurs in the laminated core stacking direction of the stator laminated core.

The sheet stacking direction preferably runs parallel to the axis of rotation. The separating element described in connection with the electrical laminated core arrangement and the stator laminated core arrangement can also be a shrinkage compensator, which is able to compensate for shrinkage of the laminated core that occurs in the laminated core stacking direction of the laminated core.

This aspect of the invention is based on the observation that the composite layers can shrink due to the thermal stress during operation of an electrical machine. This can lead to shrinkage of the electrical lamination stack arrangement in the sheet stacking direction. As a result, a prestressing force that acts in the sheet stack direction can decrease. The preload force can be built up using screw connections that are arranged in or on a housing of a stator device or electrical machine. The decreasing preload force as a result of the shrinkage of the stator can lead to screw connections becoming loose.

Since the shrinkage compensator is able to compensate for shrinkage of the stator lamination stack that occurs in the lamination stack direction of the stator lamination stack, a preload force can be maintained and thereby a particularly reliable hold of the screw connections can be ensured. Ultimately, this makes it possible to increase the operational reliability of an electrical machine constructed with the shrinkage compensator and to reduce its maintenance intensity.

Preferably, the shrinkage compensator can also compensate for heat-related increases in length of the stator laminated core.

In addition, the shrinkage compensator can transmit a force which presses the composite layers between the adjacent electrical sheets, which are connected via the composite layers, in the sheet stack direction.

The shrinkage compensator is preferably able to compensate for shrinkage of the stator laminated core that occurs in the sheet stacking direction of the stator laminated core in that a remaining force, which can press the composite layers between the adjacent electrical laminations and which the shrinkage compensator can transmit after the stator laminated core has shrunk to 98% of the original length of the stator laminated core, is at least 10% of the original force that the shrinkage compensator was able to transmit before the stator laminated core shrank.

Preferably, the remaining force that the shrinkage compensator can transmit after the stator laminated core has shrunk to 98% of the original length of the stator laminated core is at least 15%, e.g. B. at least 20% of the original force.

Such a remaining force can be completely sufficient to prevent screw connections from loosening and thereby further increase the operational reliability of an electrical machine constructed with the stator device and/or further reduce its maintenance intensity.

The shrinkage compensator can in particular be or comprise a spring element described herein in connection with the separating element. The shrinkage compensator can preferably comprise several legs.

If they are aware of the invention, experts can specifically adjust the spring element, its flat material, its shape, size and the inclination of the legs as well as the preload with little effort so that even after the stator laminated core has shrunk to 98% of the original length of the stator laminated core at least 10%, preferably at least 15%, e.g. B. at least 20% of the original force acts, which presses the composite layers between the adjacent electrical sheets.

Preferably, at least one of the composite layers comprises a synthetic resin.

The composite layers of the electrical lamination stack can preferably shrink to a maximum of 98% of the original length of the electrical lamination stack under test conditions. The electrical lamination stack shrinks to a maximum of 98% of the original length of the electrical lamination stack, particularly in the sheet stack direction.

“Test conditions” can mean, in particular, that the electrical lamination stack is exposed to air whose temperature is, for example, approximately 130, for a period of at least approximately 50 hours, preferably at least approximately 100 hours, and/or at most approximately 200 hours, for example at least approximately 168 hours °C. This can e.g. B. done in an oven.

At least one of the composite layers can contain a connecting material or consist of a connecting material.

The connecting material can contain an elastomer. The elastomer can be contained in the at least one composite layer in the form of elastomer particles. The elastomer can be a natural or a synthetic rubber, e.g. B. a nitrile butadiene rubber (NBR).

The connecting material can preferably contain an adhesion promoter, e.g. B. a Si-based adhesion promoter. A preferred Si-based adhesion promoter is an organically functionalized silane, the organically functionalized silane e.g. B. can be an aminosilane or an epoxysilane.

The adhesion promoter can promote a fluid-tight layer connection of the electrical sheets, so that penetration of temperature control fluid between the electrical sheets can be prevented even more reliably.

• - ein Elastomer, bevorzugt einen natürlichen oder synthetischen Kautschuk, z. B. einen Nitril-Butadien-Kautschuk,
• - ein Duroplast und/oder ein Thermoplast, bevorzugt ein Duroplast, z. B. ein Novolak, und
• - einen hierin beschriebenen Haftvermittler, bevorzugt einen Si-basierten Haftvermittler, z. B. ein Aminosilan.

The connecting material can preferably contain:

• - an elastomer, preferably a natural or synthetic rubber, e.g. B. a nitrile butadiene rubber,
• - a thermoset and/or a thermoplastic, preferably a thermoset, e.g. B. a novolak, and
• - an adhesion promoter described herein, preferably an Si-based adhesion promoter, e.g. B. an aminosilane.

The mass fraction of the elastomer in the connecting material can preferably be 12 to 60% by weight, e.g. B. 15 to 60% by weight, the mass fraction of the thermoset and / or thermoplastic 4 to 35% by weight, e.g. B. 5 to 35% by weight, and the mass fraction of the adhesion promoter 2 to 20% by weight, e.g. B. 3 to 15% by weight.

According to the invention, the object is also achieved by the electrical machine with the features of claim 24.

According to the invention, the object is also achieved by a motor vehicle with the features of claim 25.

Of course, in connection with an object according to the invention, i.e. H. Features described in connection with the electrical laminated core arrangement, the stator laminated core arrangement, the stator device, the electrical machine and/or the motor vehicle may also be features of another subject matter according to the invention.

Further preferred features and/or advantages of the invention are the subject of the following description and the graphic representation of exemplary embodiments.

• 1: eine schematische Darstellung einer Statorvorrichtung;
• 2: eine schematische Darstellung eines Elektroblechpaket-Trägers;
• 3: eine schematische Darstellung einer weiteren weitere Statorvorrichtung;
• 4: eine schematische Darstellung einer weiteren Statorvorrichtung mit Schrumpfkompensator und Federring;
• 5: eine schematische Darstellung einer weiteren Statorvorrichtung mit zwei gleichsinnig ausgerichteten Federringen;
• 6: eine schematische Darstellung einer weiteren Statorvorrichtung mit beidseitig angeordneten Schrumpfkompensatoren;
• 7: eine schematische Darstellung eines Elektroblechpakets mit Drehsicherungselementen;
• 8: einen Gehäusedeckel mit Trennelement;
• 9: einen Gehäusedeckel mit einem anderen Trennelement;
• 10: einen Gehäusedeckel mit einem Trennelement, das eine Halbsicke aufweist; und
• 11: einen Gehäusedeckel ohne Trennelement.

In the drawings show:

• 1 : a schematic representation of a stator device;
• 2 : a schematic representation of an electrical sheet metal package carrier;
• 3 : a schematic representation of another further stator device;
• 4 : a schematic representation of another stator device with shrinkage compensator and spring ring;
• 5 : a schematic representation of another stator device with two spring rings aligned in the same direction;
• 6 : a schematic representation of a further stator device with shrinkage compensators arranged on both sides;
• 7 : a schematic representation of an electrical lamination package with anti-rotation elements;
• 8th : a housing cover with a separating element;
• 9 : a housing cover with another separating element;
• 10 : a housing cover with a separating element that has a half bead; and
• 11 : a housing cover without a separator.

Identical or functionally equivalent elements are provided with the same reference numbers in all figures.

1 shows a stator device 200. The stator device comprises an electrical lamination stack 100. The electrical lamination stack 100 is a stator lamination stack 102. The stator device 200 comprises a stator device element 104. The stator device element 104 is a housing 106. In addition, the stator device 200 includes an electrical lamination stack carrier 108. The electrical lamination stack - Carrier 108 is a stator laminated core carrier 110.

The stator device 200 includes two separating elements 112, which are arranged on surfaces 114 of the electrical laminated core carrier 108.

The separating elements 112 each serve to seal between two rooms 120. The two rooms 120 are separated from one another by the respective separating element 112.

Temperature control channels 122 extend along a surface of the electrical lamination stack 100. One of the spaces 120 extends through the temperature control channels 122.

2 shows the electrical sheet metal package carrier 108 1 . This is a stator laminated core carrier 110. The electrical laminated core carrier 108 includes a carrier recess 124, which serves to accommodate the electrical laminated core 100 or stator laminated core 102. The electrical sheet metal package carrier 108 is essentially hollow cylindrical. Wall elements 126 extend on an inner surface of the electrical laminated core carrier 108. The temperature control channels 122 extend between the wall elements 126.

3 shows a further stator device 200. The stator device 200 comprises an electrical lamination stack 100, which is a stator lamination stack 102. It includes electrical sheets 128. Adjacent electrical sheets 128 are connected via composite layers 130.

Also those in 3 Stator device shown includes separating elements 112. The separating elements 112 serve to seal between spaces 120.

The stator device 200 includes stator device elements 104. These include the housing jacket 132 of the housing 106 and the housing cover 134.

The separating elements 112 are arranged on a surface 116 of the electrical lamination stack. The separating elements 112 are arranged between the surface 116 of the electrical lamination stack and a surface 118 of a stator device element 104. The surface 118 of the stator device element 104 is an inner surface 136 of the housing 106.

The stator device 200 includes an electrical laminated core carrier 108, which is a stator laminated core carrier 110. This is located in the radial direction between the electrical laminated core 100 and the housing 106 and in the axial direction between the two separating elements 112.

4 shows a stator device 200. The stator device includes an electrical lamination stack 100, which is a stator lamination stack 102. The stator device 200 comprises two separating elements 112. The separating elements 112 are annular sealing elements 138, ie sealing rings 140. The in 4 Separating element 112 shown on the left is a spring element 142. The spring element 142 is designed as a spring ring 144.

This in 4 Separating element 112 shown on the right is a spring element 142. The spring element 142 is designed as a spring washer 146.

The spring ring 144 can have a resilient effect in the radial direction.

The spring washer 146 can have a resilient effect in the axial direction.

An axial direction is parallel to that in 4 specified sheet stacking direction 148.

A radial direction is orthogonal to that in 4 sheet stacking direction 148 shown.

In the 4 Stator device 200 shown includes further stator device elements 104. The further stator device elements 104 include a housing jacket 132 and a housing cover 134, which can be understood as a further housing part 150. The housing cover 134 includes a recess 152. The electrical lamination package 100 has a shell-side surface 154 and two front surfaces 156.

The two separating elements 112 are arranged on different surfaces of the electrical lamination stack. A separating element 112 is arranged between the shell-side surface 154 of the electrical lamination stack 100 and the inner surface 136 of the housing. The other separating element is arranged between the front surface 156 of the electrical lamination stack 100 and an inner surface of the housing cover 134 in its recess 152.

Both separating elements 112 lie between two rooms 120.

One of the spaces 120 extends along the shell-side surface 154. This space 120 can extend into a temperature control channel 122 or through a temperature control channel 122, the temperature control channels in the simplified schematic representation of 4 are not shown.

The space 120 extending along the shell-side surface 154 is sealed by the separating elements 112 from the other two spaces 120, which extend along the two front surfaces 156.

Both separating elements 112 have a radially inwardly oriented separating element inner surface 158.

The stator device 200 is braced in the sheet stacking direction 148 by tie rods 160, which are indicated only schematically by lines. As a result, a front surface 156 can be pressed onto the spring washer 146 and the spring washer 146 can be prestressed.

The electrical sheet stack 100 includes electrical sheets, not shown here, which can be connected via composite layers, also not shown here. The electrical sheets and the composite layers extend orthogonally to the sheet stacking direction 148.

When using the in 4 Stator device 200 shown in an electrical machine, the electrical lamination stack 100 can heat up. Substances can be discharged from the composite layers. As a result, the thickness of the composite layers can decrease and the electrical sheet stack 100 can shrink in the sheet stacking direction 148. The spring washer 146 can act as a shrinkage compensator 162. If the spring washer 146 is prestressed, it can also rest on the shrunken electrical lamination package 100 (in a less strongly prestressed state of the spring washer). As a result, a seal of the space 120 extending on the shell-side surface 154 can be maintained by the spring washer 146 despite the shrinkage that has occurred in the electrical laminated core.

5 shows another stator device 200. It differs from that in 4 Stator device 200 shown only in that it comprises a second spring ring 144 instead of the spring washer 146.

The two spring rings 144 are aligned in the same direction. Starting from a leg connection area 164, both spring rings include two legs 166. The alignment is in the same direction 5 It can be seen from the fact that in both spring rings the leg connection area is arranged on the right and the two legs 166 are arranged on the left.

The leg connection area 164 defines a narrow edge 168. The two ends of the legs 166 define a wide edge 170.

In the 5 The alignment of the spring rings 144 shown in the same direction can be particularly advantageous, since the two spring rings with the narrow edge 168 in front can be introduced one after the other into a gap between the housing jacket 132 and the jacket-side surface 154 of the electrical lamination package. When inserting the respective spring ring into the gap, the two legs can be moved towards each other and the spring ring can thus be converted into a prestressed state when it is inserted into the gap.

6 shows another stator device 200. The in 6 Stator device shown differs from that in 4 stator device shown in that a second spring washer 146 is installed instead of the spring ring 144.

The two spring washers 146 are arranged on the two front surfaces of the electrical lamination stack 100.

In the 6 Stator device 200 shown also includes anti-rotation elements 172. The anti-rotation elements 172 are arranged between the shell-side surface 154 of the electrical lamination stack 100 and the inner surface 136 of the housing. They bind the electrical sheet metal package 100 to the housing jacket 132 in a rotationally fixed manner.

7 shows a schematic representation of three oversized anti-rotation elements 172, which are arranged on the shell-side surface 154 of an electrical lamination stack 100. The electrical lamination stack 100 has an electrical lamination stack recess 174. The electrical laminated core 100 is a stator laminated core 102. The stator laminated core has a stator laminated core recess 176. An in 7 Rotor, not shown, can be included in the stator laminated core recess 176.

8th shows a stator device element 104 with a separating element 112 arranged thereon. The stator device element can be a housing part 150, in particular a housing cover 134. The stator device element 104 has a recess 152. The separating element 112 is in the recess 152 arranged. The separating element 112 can serve as a shrinkage compensator 162. The recess may be a compensator receiving groove 178 that defines a compensator receiving area 180.

The separating element 112 can be a sealing element 138, in particular a sealing ring 140. The separating element is a spring element 142 designed as a spring washer 146. The spring element 142 comprises a leg connection region 164, from which two legs 166 extend. The ends of the legs each form a separating element inner edge 182.

A front surface 156 of an electrical sheet stack 100 can, for. B. by tie rods 160, be pressed onto the legs 166, which are not included in the recess 152. As a result, the spring element 142 can be prestressed. The housing cover 134 can act as an abutment 184.

It can act as an abutment for a force that acts towards the housing cover inner surface 186.

9 shows a stator device element 104 and a separating element 112 arranged thereon. Deviating from 8th , extend when represented in 9 the legs 166 radially outward from the leg connection area 164. In the 9 The arrangement shown therefore corresponds to the arrangements in 4 and 6 .

10 shows a stator device element 104 and a separating element 112 arranged thereon. The separating element 112 shown there can also be a sealing element 138, in particular a sealing ring 140. It has two legs 166, which extend from a half bead 188. The separating element 112 is a spring element 142 designed as a spring washer 146, which can function as a shrinkage compensator 162. Of course, the elastic deformability of the spring element 142 depends on what material the spring element 142 is made of and how thick the material is. The person skilled in the art can choose the material and the thickness of the material so that the spring element 142 can compensate for the shrinkage of an electrical lamination stack.

11 shows the housing cover of the arrangements 8th until 10 without separating element 112.

Reference symbol list

100

Electrical sheet metal package

102

Stator lamination package

104

Stator device element

106

Housing

108

Electrical sheet metal package carrier

110

Stator laminated core carrier

112

Separator

114

Surface of the electrical sheet metal package carrier

116

Surface of the electrical lamination package

118

Surface of the stator device element

120

Space

122

Temperature control channel

124

Carrier recess

126

Wall element

128

Electrical sheet metal

130

Composite layer

132

Housing jacket

134

Housing cover

136

Internal surface of the housing

138

Sealing element

140

sealing ring

142

Spring element

144

spring ring

146

Spring washer

148

Sheet stacking direction

150

Housing part

152

deepening

154

surface on the shell side

156

front surface

158

Separator inner surface

160

tie rod

162

Shrinkage compensator

164

Leg connection area

166

leg

168

narrow edge

170

wide edge

172

Anti-rotation element

174

Electrical sheet metal package recess

176

Stator laminated core recess

178

Compensator mounting groove

180

Compensator recording area

182

Separator inner edge

184

abutment

186

Housing cover inner surface

188

Half bead

200

Stator device

Claims (25)

Electrical lamination stack arrangement for an electrical machine, the electrical lamination stack arrangement comprising the following: - an electrical lamination stack (100), which comprises electrical laminations (128) and in which adjacent electrical laminations (128) are connected via composite layers (130), - a separating element (112) and - optionally an electrical lamination stack carrier (108), wherein the separating element (112) is arranged on a surface (116) of the electrical lamination stack (100) and/or on a surface (114) of the electrical lamination stack carrier (108). Electrical sheet metal package arrangement according to Claim 1 , characterized in that the separating element (112) extends along the surface (116) of the electrical laminated core (100) and/or along the surface (114) of the electrical laminated core carrier (108). Electrical sheet metal package arrangement according to Claim 1 or 2 , characterized in that the surface (116, 114) is a front surface (156) of the electrical lamination stack (100) or the electrical lamination stack carrier (108). Electrical sheet metal package arrangement according to Claim 1 or 2 , characterized in that the surface (116, 114) is a shell-side surface (154) of the electrical lamination stack (100) or the electrical lamination stack carrier (108). Electrical lamination stack arrangement according to one of the preceding claims, characterized in that the separating element (112) has a radially inwardly oriented separating element inner surface (158) and/or a radially inwardly oriented separating element inner edge (182), wherein the separating element inner surface (158) and/or the separating element inner edge (182) can preferably extend along a shell-side surface (154) of the electrical lamination stack (100) or the electrical lamination stack carrier (108), with an extension direction of at least part of the separating element inner surface (158 ) and / or the separating element inner edge (182) in the shell-side surface (154) can preferably be inclined or orthogonal to an axis of rotation defined by the electrical lamination stack arrangement. Electrical lamination stack arrangement according to one of the preceding claims, characterized in that the separating element (112) is a sealing element (138). Electrical sheet metal package arrangement according to one of the preceding claims, characterized shows that the sealing element (138) is a sealing ring (140). Electrical lamination package arrangement according to one of the preceding claims, characterized in that the separating element (112) is a spring element (142) or comprises a spring element (142), the spring element (142) preferably comprising a spring washer (146) or a spring ring (144). can be. Electrical lamination stack arrangement according to one of the preceding claims, characterized in that the spring element (142) consists of a flat material or comprises a flat material, preferably consists of a metal flat material or comprises a metal flat material, e.g. B. consists of a metal sheet or comprises a metal sheet. Electrical lamination stack arrangement according to one of the preceding claims, characterized in that the separating element (112) comprises a plurality of legs (166). Electrical sheet metal package arrangement according to Claim 10 , characterized in that a leg (166) of the separating element (112) is arranged on the surface (116) of the electrical laminated core (100) and/or on the surface (114) of the electrical laminated core carrier (108). Electrical sheet metal package arrangement according to Claim 10 or 11 , characterized in that a leg (166) of the separating element (112), z. B. a second leg (166) of the separating element (112) is spaced from the surface (116) of the electrical lamination stack (100) and/or from the surface (114) of the electrical lamination stack carrier (108). Electrical lamination stack arrangement according to one of the preceding claims, characterized in that the separating element (112) has a C-shaped, U-shaped, V-shaped, N-shaped and/or W-shaped profile cross section. Stator laminated core arrangement for an electrical machine, the stator laminated core arrangement comprising the following: - An electrical lamination stack arrangement according to one of the preceding claims, wherein the electrical lamination stack (100) is preferably a stator lamination stack (102), which can have an electrical lamination stack recess (174) for receiving a rotor. Stator lamination stack arrangement according to Claim 14 , characterized in that the separating element (112) forms a fluid barrier which forms a space (120), e.g. B. a temperature control zone, which is z. B. can extend through the electrical lamination stack (100) or along a surface (116) of the electrical lamination stack (100), delimited from the electrical lamination stack recess (174). Stator lamination stack arrangement according to Claim 15 , characterized in that the space (120), e.g. B. the temperature control zone, extends through the electrical sheet metal package (100). Stator device (200) for an electrical machine, wherein the stator device (200) comprises the following: - a stator laminated core arrangement according to one of Claims 14 until 16 and - a further stator device element (104), e.g. B. a housing (106) in which the stator laminated core arrangement can be at least partially accommodated. Stator device (200). Claim 17 , characterized in that a room (120), e.g. B. the temperature control zone, between the stator laminated core (102) and the further stator device element (104) extends along a surface of the stator laminated core (102). Stator device after Claim 17 or 18 , wherein the separating element (112) is arranged between a surface of the stator laminated core (102) and an inner surface of the further stator device element (104). Stator device (200) according to one of Claims 17 until 19 , characterized in that the separating element (112) is arranged on a front surface (156) of the stator laminated core (102), and that the separating element (112) is a shrinkage compensator (162) which is in the sheet stacking direction (148) of the stator laminated core (102 ) can compensate for shrinkage of the stator laminated core (102). Stator device (200). Claim 20 , characterized in that the shrinkage compensator (162) is able to compensate for shrinkage of the stator laminated core (102) that occurs in the lamination stacking direction of the stator laminated core (102) in that a remaining force which can press the composite layers (130) between the adjacent electrical laminations (128) and which the compensator can transfer after the stator laminated core (102) has shrunk to 98% of the original length of the stator laminated core (102), at least 10%, preferably at least 15%, e.g. B. at least 20% of the original force that the shrinkage compensator (162) was able to transmit before the stator laminated core (102) shrank. Stator device (200) according to one of Claims 17 until 21 , characterized in that at least one of the composite layers (130) comprises a synthetic resin. Stator device (200) according to one of Claims 17 until 22 , characterized in that the composite layers (130) change under test conditions at at least approximately 130 ° C over a period of at least approximately 50 hours, preferably at least approximately 100 hours, and / or at most approximately 200 hours, such that the electrical lamination stack (100 ) shrinks to a maximum of 98% of the original length of the electrical sheet stack (100). Electrical machine, wherein the electrical machine comprises the following: - an electrical lamination package arrangement according to one of Claims 1 until 13 , - a stator laminated core arrangement according to one of the Claims 14 until 16 , or - a stator device (200) according to one of the Claims 17 until 23 . Motor vehicle, wherein the motor vehicle has an electric machine used to drive the motor vehicle Claim 24 includes.

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