DE102022002674A1 - Pole plate for an electrical pole of an electrical machine, as well as pole tooth, electrical machine and method for producing a pole tooth - Google Patents

Abstract

The invention relates to a pole plate (6) for an electrical pole of an electrical machine (1), with - a pole tooth section (7), - two opposite pole shoe sections (8), between which the pole tooth section (7) is arranged, and - the pole tooth section (7) and the two pole shoe sections (8) are formed as a one-piece unit. The invention further relates to a pole tooth (3), an electrical machine (1) and a method for producing a pole tooth (3).

Description

The invention relates to a pole plate for an electrical pole of an electrical machine. The pole plate has a pole tooth section and two opposite pole shoe sections, between which the pole tooth section is arranged.

The invention further relates to a pole tooth for an electrical machine. The invention also relates to an electrical machine and a method for producing a pole tooth.

Electrical machines, especially rotating electrical machines, can be used in a wide variety of demanding technical applications. For example, electrical machines play a central role in the automotive industry, particularly when used in motor vehicles.

The use of electric machines as drive units or as traction motors in hybrid vehicles and/or in electric vehicles is particularly important.

Electric machines mainly consist of a rotor and a stator. The stator can be constructed from a large number of individual teeth or stator teeth. Such a single tooth or stator tooth consists of a pole core and two pole shoes.

For example, this shows DE 10 2021 002 941 A1 a pole element for providing an electrical pole of an axial flux machine. The pole core of the stator can be made from a laminated core. The two pole pieces can, for example, be glued to the pole cores in a later processing step.

Furthermore, for example, the DE 10 2019 000 663 A1 as well as that EP 2 396 874 A1 electrical machines which have individual teeth, which have a pole core made from a laminated core and pole shoes attached separately.

Furthermore, from the DE 10 2018 000 771 A1 a radial machine is known which has individual teeth. These can be made from a laminated core and have a pole core and separately attached pole shoes.

A disadvantage in the prior art is, above all, that the pole core and the two pole pieces of a single tooth of an electrical machine are manufactured in separate manufacturing processes and are then glued or brought together, for example.

Therefore, an object of the present invention is to be able to produce a single tooth, in particular for an axial flow machine, more efficiently and, in particular, at a lower cost.

This task is solved by a pole plate, a pole tooth, an electrical machine and a method according to the independent patent claims. Useful further training results from the dependent patent claims.

• - einem Polzahn, und
• - zwei einander gegenüberliegenden Polabschnitte, zwischen welchen der Polzahnabschnitt angeordnet ist, wobei
• - der Polzahnabschnitt und die zwei Polschuhabschnitte als einteilige Einheit gebildet sind.

One aspect of the invention relates to a pole plate for an electrical pole of an electrical machine

• - a pole tooth, and
• - two opposite pole sections, between which the pole tooth section is arranged, where
• - the pole tooth section and the two pole shoe sections are formed as a one-piece unit.

Through the pole plate according to the invention, with which a pole tooth or a pole element of an electrical machine can be formed, a pole tooth or stator tooth or individual tooth for an electrical machine can be produced more efficiently and in particular better. Above all, manufacturing costs or manufacturing costs can be reduced. Due to the pole tooth section and pole shoe section formed as a one-piece unit, the pole plate can be manufactured from one material or one material at the same time in one manufacturing step or in one manufacturing process step.

The pole tooth section can be, for example, a sheet metal cut or a partial cut of a pole tooth or a pole tooth core or a pole tooth base body. The pole shoe sections are individual cuts or sheet metal cuts from pole shoes.

The one-piece pole plate makes it possible, for example, to avoid gluing the pole shoe sections to the pole tooth section. This means that no insulation layer or air layer is lost due to the bonding.

In one exemplary embodiment it is provided that the pole plate has an H-shape. The pole plate can therefore be H-shaped. This results primarily from the fact that the pole tooth section and the second pole pieces are formed as a one-piece or one-piece unit. Accordingly, when considering the pole plate, which can in particular be a pole plate section of a tooth of an electrical machine, in particular an axial flux machine, can be H-shaped. This H-shape has the advantage that both the pole tooth section or pole core section and the side edges, i.e. the opposite pole shoe sections, can be formed in one piece. Thus, the basic shape of the pole plate or a sheet metal section of a pole tooth has an H-shape.

Furthermore, the pole plate can have other shapes or other geometric shapes in addition to the H-shape. In particular, the pole element has such a shape that the pole tooth section and the two pole shoe sections can be formed as a one-piece unit.

In one exemplary embodiment, it is further provided that a connecting element for connecting to an adjacent pole plate is arranged in at least one of the pole shoe sections and/or in the pole tooth section. This is particularly advantageous when a pole tooth is formed from a large number of pole plates. This means that the individual pole sheets can be better arranged or stacked one above the other, especially when producing a pole tooth and in particular when stacking laminated metal sheets. Such a connecting element thus serves to simplify the stacking of several pole plates, in particular to form a pole tooth or individual tooth. In particular, with the help of the connecting element, a positive connection can be produced between adjacent pole sheets, which have been stacked, for example.

In a further exemplary embodiment it is provided that the pole plate is designed as an electrical sheet. The pole plate thus has an electrical sheet as a material or as a material. In particular, both the pole tooth section and the two opposite pole shoes are made or formed from the same electrical sheet metal. The electrical sheet can be a soft magnetic material.

In particular, the pole plate can be made from an SMC material (“soft magnetic components”). Such an SMC material can, for example, be a soft magnetic material that has good magnetic properties.

Additionally or instead, the pole plate can have a special coating, such as a baking varnish. This special coating is used, for example, to be able to bake or connect several stacked pole sheets together to form a BN by heating or using solvents. This enables better mechanical strength of the pole tooth formed.

For example, the electrical sheet can consist of an iron-silicon alloy. Furthermore, the electrical sheet can be designed as a cobalt iron sheet or as a medium iron sheet.

A further aspect of the invention relates to a pole tooth for an electrical machine, wherein the pole tooth is formed from a stack of several pole plates according to the previous aspect or an advantageous development thereof. The electrical machine has an axial direction and a radial direction perpendicular thereto, which results in a radial direction and an axial direction for the pole tooth when the pole tooth is operating as intended as part of the electrical machine.

In particular, the pole tooth can have a plurality of pole plates stacked one above the other or arranged one above the other. The pole tooth therefore consists of a large number of pole plates, each of which is formed in one piece. In particular, a pole plate according to the previous aspect can be used to be able to form a corresponding pole tooth. The pole tooth thus has a sheet metal arrangement, i.e. a stacking of individual pole sheets or pole sheet sections. Accordingly, in a sectional view, the pole tooth each has a corresponding, one-piece pole plate.

If such a pole tooth formed is part of an electrical machine, i.e. the electrical machine is formed, for example, from a large number of pole teeth, the radial direction and the axial direction of the pole tooth can correspond to the axial and radial direction of the electrical machine.

For example, the pole tooth according to the invention can be used as a single tooth for a rotor or a stator. Accordingly, at least one pole tooth according to the invention or several such pole teeth can be used for electrical machines. In particular, the pole tooth according to the invention can be a stator tooth of a stator of an axial flux machine.

In particular, the pole tooth can be formed by packaging or sheet metal packaging of individual pole plates according to the previous aspect.

By means of the pole tooth according to the invention, an electrical machine, in particular an axial flux machine, can be produced with minimal effort and, in particular, with reduced costs. The pole tooth can therefore be produced cost-effectively in the simplest manner, in particular through a process involving the packaging of the pole sheets.

Accordingly, the pole tooth has a respective cut through the stack or the stacking of the pole sheets, which has, for example, an H-shape of the pole shoe sections formed in one piece with one another and of the pole tooth section. Accordingly, each sheet metal layer or each pole plate of the pole tooth has a one-piece unit and, above all, the respective pole plate or a respective sheet metal layer of the pole tooth is made from one and the same material, in particular in one processing step.

In particular, the stacked pole sheets are stacked or arranged on top of each other in the radial direction outwards. Accordingly, the one-piece pole plates are stacked in the radial direction to form the pole tooth.

With the help of the pole tooth or a pole element, an electrical pole of the electrical machine, in particular an axial flux machine, can be provided or created.

The pole tooth has two opposite pole pieces, between which a winding to be carried by the pole tooth can be arranged. The stack of pole plates simultaneously forms a pole tooth base body or a pole tooth core and the two pole pieces. The pole tooth base body can therefore be formed by the pole tooth sections stacked on top of one another. The two pole pieces can be formed by the pole piece sections stacked on top of each other.

In an exemplary embodiment of the further aspect it is provided that a width of the pole tooth is constant in the axial direction. Accordingly, each pole tooth for the electrical machine has a constant width or width when viewed axially. This is particularly advantageous for the magnetic properties of the pole teeth and in particular for the magnetic properties and in particular for the efficiency of the electrical machine. By means of the pole teeth formed with the constant width, a magnetic flux or a magnetic property, for example, can be advantageously designed, especially during operation of the electrical machine.

Accordingly, a respective width of the pole tooth is constant or unchanged with respect to the axial direction. Accordingly, each pole tooth of the electrical machine can have the same width.

In a further exemplary embodiment of the further aspect, it is provided that the stack of pole sheets forms a wedge shape, with a width of this formed wedge shape increasing in the radial direction outwards. Accordingly, the stack of pole plates has a continuous widening towards the outside with respect to the radial direction. In particular, the wedge shape, i.e. the pole tooth, is narrower when viewed in the radial direction inwards than when viewed in the radial direction outwards. In particular, the stack of pole plates can be wedge-shaped or have another magnetically advantageous shape. The wedge shape or a correspondingly variable shape can provide an improved magnetic property for the pole tooth.

In a further exemplary embodiment of the further aspect, it can be provided that two axially spaced sheet metal webs are arranged at end regions of the pole tooth in relation to the radial direction, with these sheet metal webs protruding from a respective outermost pole sheet of the stack when viewed in the radial direction. With the help of the sheet metal webs attached or arranged at the end regions, the winding carried between the pole pieces by the pole tooth can be better held or received on the pole tooth. This means that, in particular, the winding cannot slip down from the pole tooth, for example, or move away from the pole tooth.

Thus, two axially spaced sheet metal webs or sheet metal elements or sheet metal rectangles or sheet metal projections can be attached to the end regions. This can be done, for example, by packaging, especially when producing the pole tooth. The pole tooth thus has two sheet metal webs on its two radial end regions or end sections or end sides, i.e. viewed in the radial direction. The sheet metal webs at the respective radial end regions create a termination of the pole tooth in the radial direction fen. With regard to the stack of pole sheets, these sheet metal webs protrude from or over the respective outermost pole sheet, i.e. the two outermost pole sheets in the radial direction. The pole tooth thus has a termination or a protruding termination on its radial end sides or end regions.

Another aspect of the invention relates to an electrical machine, in particular an axial flux machine, with at least one pole tooth according to the previous aspect or an advantageous development. In particular, the electric machine has a plurality of pole teeth according to the previous aspect. For example, the electrical machine can have a stator, so that this stator has a large number of pole teeth or stator teeth.

For example, the electrical machine can be a three-phase alternating current machine such as an asynchronous machine or a synchronous machine. In particular, the electric machine is a three-phase machine, which can be used for an electric traction drive of an electrically operated vehicle. For example, the electrical machine can be a transverse flux machine.

Since the electrical machine according to the invention can be used primarily in the automotive industry, the electrical machine can be designed specifically as an axial flux machine. Such an axial flux machine has high efficiency over a wide speed range, which is particularly advantageous in the area of vehicle traction. Such an axial flux machine can have, for example, a disk-shaped stator, which is formed from a large number of pole teeth or stator teeth. The pole teeth according to the invention can be made, for example, from a powder composite material.

A further aspect of the invention relates to a method for producing a pole tooth according to one of the preceding aspects or an advantageous development thereof. A corresponding pole tooth can thus be produced according to one of the preceding aspects using the method just proposed. Both pole shoes and a pole tooth base body of the pole tooth can be formed at the same time, especially through the stack of pole plates. Thus, by stacking the pole sheets or by stacking pole sheets, the entire pole tooth is produced in one step, for example by stacking the sheets. Due to the one-piece or integrally formed pole sheets, which are formed into a stack or into a stack of sheets, the pole tooth core or the pole tooth base body and the two pole shoes can be produced simultaneously or synchronously in one process method or one process step.

Advantageous developments of one aspect of the present invention can be viewed as advantageous developments of another aspect and/or all other aspects. This also applies in reverse.

In particular, the pole plate, the pole tooth and/or the electrical machine can have, in particular technical, means to carry out or carry out the method according to the invention.

Advantageous embodiments of the pole plate and the pole tooth are to be viewed as advantageous embodiments of the electrical machine and the method. Advantageous embodiments of the electrical machine or the method can also be viewed as advantageous embodiments of the pole plate and/or the pole tooth.

Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawing(s). The features and combinations of features mentioned above in the description as well as the features and combinations of features mentioned below in the description of the figures and/or shown in the figures alone can be used not only in the combination specified in each case, but also in other combinations or on their own, without the scope of to abandon invention.

• 1 eine schematische Darstellung einer elektrischen Maschine;
• 2 eine schematische Darstellung eines Polzahns der elektrischen Maschine aus 1; und
• 3 eine weitere schematische Darstellung eines Polzahns der elektrischen Maschine aus 1.

The following figures show:

• 1 a schematic representation of an electrical machine;
• 2 a schematic representation of a pole tooth of the electrical machine 1 ; and
• 3 another schematic representation of a pole tooth of the electrical machine 1 .

In the figures, functionally identical elements are provided with the same reference numbers.

In the 1 a schematic representation of an electrical machine 1 is shown. At This electrical machine 1 can be a three-phase machine, in particular for use in electrically powered vehicles. Other types of electrical machines are also conceivable embodiments.

The electrical machine 1 can have, for example, a stator and a rotor. In particular, the electrical machine 1 is rotatable with respect to an axis of rotation 2. An axial direction A can be predetermined in the direction of the rotation axis 2, which extends in particular through the center of the electrical machine 1. The axial direction A thus extends corresponding to the axis of rotation 2. The electrical machine 1 has a radial direction R perpendicular to this axial direction A.

Furthermore, the electrical machine 1 can have a circumferential direction U. This runs, for example, according to the circumference of the electrical machine 1 and in particular according to the stator or rotor.

The electrical machine 1 can have a pole tooth 3, for example. This can be, for example, a single tooth or a stator tooth. The at least one pole tooth 3 or further pole teeth 4 can be arranged accordingly in the circumferential direction U, in particular in a ring shape.

In the 2 A schematic representation of the pole tooth 3 is now shown. A sectional view of the pole tooth 3 is shown here as an example.

So that the pole tooth 3 can be manufactured as cost-effectively and, above all, efficiently, especially in a manufacturing process, it can be made from a stack of several pole plates 5 (cf. 1 ) be educated. The pole tooth 3 is therefore formed from several stacked sheet metal layers or electrical sheets. Furthermore, in normal operation of the pole tooth 3 as a component of the electrical machine 1, the same reference for the pole tooth with respect to the radial direction R and the axial direction A corresponds.

The special design of the sheet metal layers 4 sheet metal layers 5 on a sheet metal layer 6 is explained below. This applies to all sheet metal layers or pole plates 5 of the pole tooth 3.

The pole plate 6 has a pole tooth section 7 and two opposite pole shoe sections 8, between which the pole tooth section 7 is arranged. The pole shoe sections 8 and the pole tooth section 7 can be designed or formed as a one-piece or one-piece unit. The pole plate 6 can therefore be referred to as a one-piece element or unit. The pole tooth 3 thus consists of an arrangement of one-piece or one-piece pole plates 5, 6.

As an example in the 2 shown, the pole plate 6 can have an H-shape. This is primarily due to the fact that both the pole tooth section 7 and the pole shoe sections 8 were formed as a one-piece unit or were designed as a one-piece unit.

Above all, the stack of pole plates 5, 6 allows both pole pieces 9 (cf. 3 ) and a pole tooth base body 10 (cf. 3 ) are formed. By stacking the pole sheets 5, 6 together, the pole tooth base body 10 or a pole tooth core can be formed by the pole tooth sections 7 stacked together. The two pole shoes 9, which are arranged opposite one another between the pole tooth base body 10, can be formed by the pole shoe sections 8 stacked together or adjacent to one another. Thus, for example, the pole tooth 3 of the electrical machine 1 can be manufactured directly from sheet metal packaging. This has the main advantage over the prior art that in the prior art the pole tooth base body 10 and then the pole pieces 9 are manufactured first. The assembly is done there, for example, by gluing.

For example, each of the pole plates 5, 6 can be designed as an electrical sheet. The pole plates 5, 6 or the pole plate 6 therefore consist, for example, of a soft magnetic material. In one exemplary embodiment, the pole plate 6 can be formed from a stack or an adjacent arrangement of sheet metal layers or electrical sheets.

In order to be able to stack or arrange the sheet metal layers 5 better, in particular with a precise fit, a connecting element 11 for connecting to an adjacent pole plate can be arranged in at least one of the pole sections 8 and/or in the pole number section 7. Thus, all pole plates 5 can have corresponding connecting elements 11, so that, above all, precise stacking on top of one another can be achieved. The pole plate 6 can thus provide connection-promoting arrangement aids and/or orientation aids, such as lateral grooves for snapping into place the cavity or elevations or indentations. Above all, the connecting element 11 can be elevations or indentations. These can be arranged on the surface side of the sheet metal layers or the pole plate 6. The connecting element 11 can be produced, for example, by stamping during the production of the pole plate. Thus, using the connecting element 11, the sheet metal layers or pole sheets 5 can be stacked appropriately one on top of the other in accordance with this connecting element 11. With the help of the connecting element 11 or several connecting elements, the pole plates 5 can be connected to one another in a form-fitting manner.

For example, at least one first connecting element 12 can be arranged on the upper side, which extends outwards in the radial direction R, and at least one second connecting element 13 corresponding to the first connecting element 12 can be arranged on a lower side, which extends inwards with respect to the radial direction R. These connecting elements 12, 13 are complementary.

When joining or stacking the sheet metal layers 5, for example, the first connecting element 12 of the pole plate 6 can interlock or fit into one another with at least one second connecting element 13 of another pole plate 5 adjacent to this pole plate 6. For example, the first connecting element 12 can be a recess or indentation. Accordingly, the second connecting element can be a survey. These are arranged opposite each other, in particular with respect to two pole plates. When stacking the sheet metal layers 5, in particular in the radial direction R, the connecting element 11 or the connecting elements 12, 13 overlap in the radial direction R. This has the advantage that a stack or a stacking is given without an external shape, for example a cavity, is required for arranging the pole plates 5.

Furthermore, a width 14 of the pole tooth 3 in the axial direction A can be constant. Thus, a respective width in the axial direction A of each pole plate 5, 6 can be the same or identical. Furthermore, as for example in the 2 You can see the stack of pole plates 5, 6, which form the pole tooth 3, in a wedge shape or wedge-shaped. This is a possible embodiment. The pole tooth 3 thus has a wedge shape. A width of this formed wedge shape or the pole tooth 3 can in turn increase or widen outwards in the radial direction R. This means that the width can be 15 (compare 3 ) of the wedge shape or the pole tooth 3 become wider radially outwards. The pole tooth 3 is therefore narrower in its area which extends radially inwards than the areas which extend radially outwards. In particular, the width 15 is a width of the pole tooth 3 with respect to the circumferential direction U.

Now the pole plate 6 can be described again differently, for example. The pole plate 6 or a respective section of the pole tooth 3 formed from sheet metal layers essentially has an H-shape, particularly in the core area. With a wedge shape, it continues to extend outwards in the radial direction R. The width 15 of the wedge or the pole tooth 3 remains unchanged and with it the “width of the H-shape”. Accordingly, the basic shape of the sheet metal cuts or the pole plate 6 has an H-shape, which forms both the pole core, i.e. the pole tooth section 7, and the side edges, i.e. the pole shoe sections 8. Thus, the pole tooth 3 or a pole element of the electrical machine 1 can be produced in one step using the multiple pole plates 5. Accordingly, for example, a complete single tooth or pole tooth 3 for an electrical machine 1 can be produced or manufactured from an electrical sheet.

For this purpose, the pole tooth 3 in particular can be manufactured in such a way that both pole shoes 9 and a pole tooth base body 10 are formed by the stack of pole plates 5 at the same time.

Viewed in the axial direction A, the pole base body 10 is located between the two plate-like pole pieces 9.

In the 3 is again the one from the 2 known pole tooth 3 shown as an example in a further exemplary embodiment.

The pole tooth 3 can have two axially spaced sheet metal webs 18, 19 at end regions 16, 17 in relation to the radial direction R. These sheet metal webs 18, 19 can protrude or protrude from a respective outermost pole plate of the stack of pole plates 5 when viewed in the radial direction R.

When viewed in the radial direction R, the end region 16 can be the radially inwardly directed region or side of the pole tooth 3. This end region 16 is therefore directed towards the axis of rotation. The end region is directed outwards with respect to the radial direction R. The sheet metal webs 18, 19 can therefore be For example, be arranged on the end regions 16, 17 so that they are attached to the outermost pole plates 5 or protrude from there. For example, each of these sheet metal webs 18, 19 can be arranged at a respective end of a respective radial end region of the pole shoes 9. In particular, these sheet metal webs 18, 19 can be manufactured or formed at the same time during the manufacturing process of the pole tooth 3. Thus, for example, when producing the pole tooth 3 at the radial start and at the radial end, the radial projections of the edges, i.e. the sheet metal webs 18, 19, can be formed by attaching or arranging or parquetting two axially spaced sheet metal webs or sheet metal rectangles. For this purpose, for example, a form can be used that appropriately accommodates the sheet metal layers or the pole sheets 5 and arranges them one above the other or that they are punched one above the other using sheet metal parquetting types, whereby each pole sheet or pole sheet 5 or sheet metal layer can require a different sheet metal cut. This can be represented, for example, by a flexible or adjustable punching matrix. A sequence of different punching steps can also be carried out, each with its own punching shape and thus a corresponding sheet metal cut. It is also conceivable that mixing can occur between these punching processes. In particular, the pole tooth 3 can be produced by stamping. Above all, the pole tooth base body 10 and the pole shoes 9 can be manufactured in a laminated core.

For example, the pole core or the pole tooth base body 10 as well as the two pole shoes 9 can be constructed together using an electrical sheet or another soft magnetic material. For this purpose, horizontal punching or a horizontal punching process using a controlled tool unit can be used. In particular, each of the pole plates 5 can be designed differently. The pole sheets 5 can be tiled to form the pole tooth 3, for example by baking or welding.

Below, a manufacturing process or the process steps for manufacturing the pole tooth 3 can be explained in other words.

For example, in a first step, the pole shoe sections can be punched as rectangular sheets. You can start on the narrow side, i.e. on the radially inward side. In a subsequent, optional second step, these punched sheets from the first step can be introduced into a cavity, i.e. into a cavity to be filled. In a subsequent third step, the further “rectangular” sheets can be inserted into the cavity and punched with respect to the sheet metal webs 18, 19. The H-shaped pole plates 5 can then be punched and inserted into the cavity. Optionally, the wide sides, i.e. the protruding sides in the radial direction R, of the pole shoe plates of the pole shoe sections 8 can be punched and inserted here. Subsequently, in a sixth step, for example, the cavity can be closed and in a subsequent optional seventh step, the stacked pole sheets 5 can be baked or welded.

To make things easier, the cavity can, for example, have steps to make it easier to insert the respective sheets or sheet metal sections.

Furthermore, the pole plates can have 5 grooves and/or dovetail grooves for guidance or indexing into the cavity. For example, the individual pole plates 5 can have lateral grooves with which indexing and arrangement in the cavity can be facilitated or supported. Furthermore, with the help of these lateral grooves, the individual sheet metal cuts or pole sheets 5 can be snapped into the cavity.

In other words, with regard to a process step for the individual tooth production or for the production of the pole tooth 3, the individual pole sheets 5 or GO sheets can first be punched in a baking cavity. For example, the punch punches directly into the cavity. Corresponding position holders or negatives of the pole tooth 3 can be present in the cavity so that the pole plates 5 can be positioned correctly. The baking cavity can then be clamped after all pole sheets 5 have been punched. The baking cavity can then be tempered to 200° Celsius, for example. This can be done by induction or by a heating process such as an oven. Curing then takes place for a predetermined period of time, such as approximately 5 to 7 minutes. After cooling, the cavity can then be removed from the mold.

Reference symbol list

1

electric machine

2

Axis of rotation

3

Rotor tooth

4

More pole teeth

5

Pole plates

6

Pole plate

7

Pole tooth section

8th

Pole piece sections

9

Pole shoes

10

Pole tooth base body

11

connecting element

12,13

First and second connecting element

14

Width of the pole tooth in the axial direction

15

Width of the wedge shape

16, 17

End areas

18, 19

Sheet metal bars

A

Axial direction

U

Circumferential direction

R

Radial direction

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102021002941 A1 [0006]
• DE 102019000663 A1 [0007]
• EP 2396874 A1 [0007]
• DE 102018000771 A1 [0008]

Claims (10)

Pole plate (6) for an electrical pole of an electrical machine (1), with - a pole tooth section (7), and - two opposite pole shoe sections (8), between which the pole tooth section (7) is arranged, characterized in that - the pole tooth section (7) and the two pole shoe sections (8) are formed as a one-piece unit. pole plate (6). Claim 1 , characterized in that the pole plate (6) has an H-shape. pole plate (6). Claim 1 or 2 , characterized in that a connecting element (11, 12, 13) for connecting to an adjacent pole plate (5) is arranged in at least one of the pole shoe sections (8) and / or in the pole tooth section (7). Pole plate (6) according to one of the preceding claims, characterized in that the pole plate (6) is designed as an electrical sheet. Pole tooth (3) for an electrical machine, wherein - the pole tooth (3) consists of a stack of several pole plates (5, 6) according to one of the preceding Claims 1 until 4 is formed, wherein - the electrical machine (1) has an axial and a perpendicular radial direction, which means that when the pole tooth (3) is in normal operation as part of the electrical machine (1) there is a radial direction (R) for the pole tooth (3). and an axial direction (A). Pole tooth (3). Claim 5 , characterized in that a width (14) of the pole tooth (3) is constant in the axial direction (A). Pole tooth (3). Claim 5 or 6 , characterized in that the stack of pole sheets (5, 6) forms a wedge shape, with a width (15) of this formed wedge shape increasing outwards in the radial direction (R). Pole tooth (3) according to one of the previous ones Claims 5 until 7 , characterized in that in relation to the radial direction (R) two axially spaced sheet metal webs (18, 19) are arranged at end regions (16, 17) of the pole tooth (3), these sheet metal webs (18, 19) being in the radial direction ( R) viewed from a respective outermost pole plate of the stack. Electric machine (1), in particular an axial flux machine, with at least one pole tooth (3, 4) according to one of the preceding Claims 5 until 8th . Method for producing a pole tooth (3, 4) according to one of the preceding Claims 5 until 8th , whereby - both pole shoes (9) and a pole tooth base body (10) of the pole tooth (3, 4) are simultaneously formed by the stack of pole plates (5, 6).

Images