Stator or rotor tooth, rotor, stator, axial flux machine and vehicle

Abstract

The invention relates to a stator or rotor tooth (10) with the features of claim 1, a rotor (3) or stator (5) with the features of claim 5, an axial flux machine (2) with the features of claim 6 and a vehicle (1) with the features of claim 7.

Description

Technical field

[0001] The invention relates to a stator or rotor tooth, a rotor, a stator, an axial flux machine and a vehicle. State of the art

[0002] JP 7203339 B2 shows a stator tooth with a winding support, wherein the winding support has a shape that causes a winding arranged on the winding support and the stator tooth to be in contact with the winding support and the stator tooth.

[0003] A particular disadvantage of the devices in the prior art is that such a winding carrier is unable to optimize the magnetic flux of the stator tooth and the winding. Description of the invention, problem, solution, advantages

[0004] The object of the present invention is to provide a solution which, in particular, partially or completely overcomes the disadvantages of the prior art.

[0005] The problem is solved by a stator or rotor tooth, a rotor, a stator, an axial flux machine, and a vehicle, each with the features of the corresponding independent claim. Naturally, embodiments and details described in connection with the stator or rotor tooth can also be applied to the rotor, the stator, the axial flux machine, and the vehicle, and vice versa.

[0006] A first object of the invention relates to a stator or rotor tooth having the features of claim 1.

[0007] One embodiment of the invention relates to a stator or rotor tooth for an axial flux machine, wherein the tooth comprises individual, stacked sheet metal laminations and wherein the tooth has a trapezoidal basic shape in a cross-sectional plane, wherein the cross-sectional plane is defined by a radial vector which runs in the cross-sectional plane and defines a radial direction, wherein the radial vector intersects the tooth and the radial direction determines the stacking direction of the sheet metal laminations, characterized in that the stacking and the sheet metal laminations are designed such that the radially inner and / or outer corners of the tooth are rounded in the cross-sectional plane in order to reduce or eliminate, in particular in the cross-sectional plane, a distance of a winding of the tooth to the tooth.

[0008] This will at least partially or completely overcome the disadvantages mentioned at the beginning of this text, which stem from the state of the art.

[0009] It is particularly advantageous if the term "tooth" refers to either the stator tooth or the rotor tooth.

[0010] It is also advantageous if the sheet metal laminations consist of individual sheets that are electrically insulated from each other, in order to reduce eddy current losses.

[0011] A previous or preferred embodiment is characterized in that the corners of the stator tooth are rounded in the cross-sectional plane by having the sheet metal laminations exhibit a decreasing width with increasing stacking in the radial direction and / or opposite to the radial direction in order to form the rounding of the corners, and preferably in that the width extends in the cross-sectional plane perpendicular to the radial direction. In other words, the rounding is preferably formed by having the dimensions of the sheets of the sheet metal lamination decrease perpendicular to the radial direction in the area where the rounded corners are formed with increasing stacking in the radial direction and / or opposite to the radial directions. In other words, the width is measured in a lateral direction that preferably extends in the cross-sectional plane perpendicular to the radial direction.

[0012] The rounded corners are preferably formed by means of five to thirty, in particular five to ten, sheets or sheet laminations. The sheets preferably have a thickness of 0.2 mm to 0.3 mm.

[0013] It is also preferable if the radial direction is perpendicular to the rotor shaft of an axial flux machine when the tooth is part of an axial flux machine with a rotor shaft. In this case, the radial vector and / or the radial direction preferably extends away from the rotor shaft. Additionally or independently of this, the cross-sectional plane preferably extends perpendicular to the axis of rotation of the rotor shaft.

[0014] Preferably, the sheet lamination or the sheets of the sheet lamination are characterized by high permeability. This allows the magnetic flux to be improved.

[0015] One of the previous embodiments or a further preferred embodiment is characterized in that the sheet metal lamination is formed in one piece with a sheet metal lamination of at least one further adjacent tooth.

[0016] One of the previous embodiments or a further preferred embodiment is characterized in that the tooth is wrapped in the cross-sectional plane by means of a winding, wherein the winding rests against the contour of the tooth in the cross-sectional plane.

[0017] Another object of the invention is a stator or rotor with at least one tooth according to the invention.

[0018] Another object of the invention is an axial flux machine comprising at least one stator or at least one rotor according to the invention.

[0019] The axial flux machine can be an axial flux machine of the rotor-stator-rotor design or of the stator-rotor-stator design.

[0020] The axial flux machine is preferably a traction motor.

[0021] The axial flux machine can preferably be designed for a nominal voltage of at least 600 volts.

[0022] Another object of the invention is a vehicle with an axial flux machine according to the invention, or a stator according to the invention, or a rotor according to the invention, or a tooth according to the invention.

[0023] The vehicle is preferably an electric vehicle, and the axial flux machine is preferably a traction motor of the vehicle.

[0024] Advantageous embodiments of the present invention are described in the dependent claims and in the following description of the figures. Brief description of the drawings

[0025] The invention will now be explained in detail using exemplary embodiments and with reference to the drawings. The drawings show: Fig. 1 an embodiment of a vehicle according to the invention, and Fig. 2 an embodiment of a stator tooth according to the invention. Preferred embodiment of the invention

[0026] The Fig. Figure 1 shows an embodiment of a vehicle 1 according to the invention. The vehicle 1 is an electric vehicle comprising an embodiment of an axial flux machine 2 according to the invention, which serves as traction 2. The axial flux machine 2 is an axial flux machine 2 of the rotor-stator-rotor design and comprises two rotors 3 of an embodiment according to the invention and a stator 5 of an embodiment according to the invention. A rotor shaft 6 of the axial flux machine 2 has an axis of rotation 4 to which two cross-sectional planes 7 pass perpendicularly through the rotor 3 and the stator 5. The cross-sectional plane 7 passing through the stator 5 forms a section AA.

[0027] The Fig. Figure 2 shows an embodiment of a stator tooth 10 according to the invention. It is the sectional view AA of the section path AA from Fig. 1. A radial vector 8 is shown, defining the radial direction 8 and running in the cross-sectional plane. A lateral direction 13 runs perpendicular to the radial direction 8 or to the radial vector 8. It can also be seen that the corners 12 of the stator tooth 10 are rounded, in that the extent width of the sheet lamination, measured in the lateral direction 13, decreases with increasing stacking in the radial direction 8. This allows a winding, which can be supported by the stator tooth 10, to lie as close as possible to the contour of the stator tooth 10 in the cross-sectional plane. This improves the magnetic flux of such a tooth 10. The [missing information] to the stator tooth 10 in Fig. The details shown and described in Figure 2 are equally applicable to a rotor tooth according to the invention. For the sake of simplicity, however, only a representation of the stator tooth 10 has been chosen. Furthermore, for the sake of simplicity, the representation of a winding in the Fig. 2 waived.

[0028] The examples of implementation of Fig. 1 and Fig. In particular, paragraphs 2 do not have a restrictive character and merely serve to clarify the inventive idea. Reference symbol list 1 vehicle 2 Axial flux machine 3 Rotor 4 Rotation axis 5 Stator 6 Rotor shaft 7 Cross-sectional plane 8 Radial vector, radial direction 9 Latitude 10 Stator tooth, tooth 11 Sheet metal lamination 12 corner 13 Latitude QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 7203339 B2

[0002]

Claims

[1] Stator or rotor tooth (10) for an axial flux machine (2), wherein the tooth (10) comprises individual, stacked sheet metal laminations (11) and wherein the tooth (10) has a trapezoidal basic shape in a cross-sectional plane (7), wherein the cross-sectional plane (7) is defined by a radial vector (8) which runs in the cross-sectional plane (7) and defines a radial direction (8), where the radial vector (8) intersects the tooth (10) and the radial direction (8) specifies the stacking direction of the sheet laminations (11), characterized by , that the stacking and the sheet laminations (11) are designed such that the radially inward and / or outward corners (12) of the tooth (10) are rounded in the cross-sectional plane (7) in order to reduce or eliminate, in particular in the cross-sectional plane (7), a distance of a winding of the tooth (10) to the tooth (10). [2] Stator or rotor tooth (10) according to claim 1, characterized by , that the corners (12) of the stator tooth (10) are rounded in the cross-sectional plane (7) by having the sheet metal laminations (11) having a decreasing extent width with increasing stacking in the radial direction (8) and / or opposite to the radial direction (8) in order to form the rounding of the corners (12), and preferably that the extent width in the cross-sectional plane (7) extends perpendicular to the radial direction (8). [3] Stator or rotor tooth (10) according to any one of the preceding claims, characterized by , that the sheet lamination (11) is formed in one piece with a sheet lamination (11) of at least one further adjacent tooth. [4] Stator or rotor tooth (10) according to any one of the preceding claims, characterized by, that the tooth (10) is wrapped in the cross-sectional plane (7) by means of a winding, wherein the winding in the cross-sectional plane (7) lies against the contour of the tooth (10). [5] Stator (5) or rotor (3) having at least one tooth (10) according to any one of the preceding claims. [6] Axial flux machine (2) comprising at least one stator (5) according to claim 5 and / or at least one rotor (3) according to claim 5. [7] Vehicle (1) comprising an axial flux machine (2) according to claim 6 or a stator (5) according to claim 5 or a rotor (3) according to claim 5 or a tooth (10) according to any one of claims 1 to 4.

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