Abstract: Various embodiments include a method for manufacturing a stack of magnetic laminations for a rotor and/or stator of an electric machine. The method includes: recording a respective physical property of each respective magnetic lamination from a plurality of magnetic laminations; determining a setpoint value for a physical variable of the stack of magnetic laminations; ascertaining a stacking sequence of the individual magnetic laminations of the plurality reducing a deviation of an actual value for the physical variable of the stack with the ascertained stacking sequence from a setpoint value in relation to stacks with other stacking sequences of magnetic laminations; and stacking the plurality of the magnetic laminations in the ascertained stacking sequence.

Abstract: Various embodiments of the teachings herein include a material layer. The material layer may include: a first ply including a first material adjoined along its planar extent by a second material, and integrally bonded along a first connecting section, the first having a lower relative permeability ?? than the second; a second ply integrally bonded to the first and at least partially covering the latter on a planar side, the second ply including a third and a fourth material connected along a planar extent along a second connecting section, the region of the third material or the fourth at least partially overlapping the first connecting section; and a third ply including a fifth and a sixth material, arranged on the first ply on a planar side opposite the second ply. The fourth material and the sixth material comprise a matching substance material different in relative permeability from the second material.

Abstract: A method for manufacturing an electric machine having a stack of magnetic laminations including a stack of green blanks. A first green blank of the stack is printed. A separating layer is applied to the first green blank. At least a second green blank of a magnetic lamination is printed onto the first green blank with the separating layer. The green blanks are jointly sintered.

Abstract: Various embodiments of the teachings herein include an electric machine. The electric machine may comprise a stator and/or a rotor with a stack of soft-magnetic laminations. Each lamination is close to an adjacent lamination on respective flat sides of the laminations. The laminations are electrically insulated from one another by a metal oxide formed on at least one of the flat sides.

Abstract: In a method for producing a material layer with a void, a first suspension containing a binder is applied through a first opening in a first template and a second suspension containing a binder and solid particles is applied through a second opening in a second template. The first opening in the first template is completely contained within the second opening in the second template such that the second suspension completely surrounds the first suspension to produce a green body. The green body containing the first and second suspensions is sintered such that the first suspension is evaporated to provide the void and permanent cohesion of the solid particles in the second suspension is achieved.

Abstract: Various embodiments of the teachings herein include an electric machine. The machine comprises a stator and/or a rotor with a stack of soft-magnetic laminations. The soft-magnetic laminations are disposed next to one another on flat sides of the laminations. At least one of the flat sides on which two adjacent laminations are close to one another is formed with a sintering skin.

Abstract: Various embodiments of the teachings herein include an electrical machine. The electrical machine may include a rotor and/or a stator with a stack of soft magnetic laminations. Each soft magnetic lamination has a first respective flat side and a second respective flat side facing away from the first one. Each soft magnetic lamination tapers from the first flat side to the second flat side. Each of the soft magnetic laminations in the stack are oriented with the respective second flat side in the same direction.

Abstract: A mechanical device for converting direct current into three-phase alternating current includes a contact unit having at least two receiving regions for receiving electrical energy as direct current and at least three output regions for outputting electrical energy as alternating current. A first receiving region contacts a positive pole of a direct current feed. A second receiving region contacts a negative pole of the direct current feed. A first output region provides a first alternating current, a second output region provides a second alternating current, and a third output region provides a third alternating current. A contacting unit receives the direct current and/or outputs the alternating current, and an assembly provides contact of the output regions with three phases of a dynamoelectric rotating machine. An isolator between two of the output regions and the contact prevents the contact from making contact with the two output regions at a same time.

Abstract: In a method for producing a stator for an electric rotating machine, first material layers of a first metal material are produced from a green body by a sintering process. The first material layers of the first metal material are stacked to form a toothed arrangement comprised of a plurality of radially oriented teeth and an inner ring to connect the teeth. Each of the first material layers has a first thickness in a range of 10 ?m to 250 ?m, in particular in a range of 10 ?m to 100 ?m. Second material layers of a second metal material are stacked to form a yoke, with the first metal material having a saturation induction which is higher than a saturation induction of the second metal material. The yoke is joined to the toothed arrangement to form a material layer structure, and the inner ring is removed.

Abstract: In a method for correcting a portion, in particular a tooth, of a material layer of a dynamoelectric machine, with the material layer including a soft-magnetic material and having a layer thickness between 0.5 and 500 ?m, an actual geometry of the portion of the material layer is ascertained and compared to a target geometry. A deviation of the actual geometry from the target geometry is determined. Before the deviation is corrected by partially plastically deforming the material layer using a light source, the material layer is partially heated by a further light source.

Abstract: A material layer for a laminated core of an electric machine is made of iron-containing ferromagnetic material and includes an electrically insulating coating on at least one side of the material layer. The electrically insulating coating Includes an electrically Insulating material which Is produced through controlled oxidation of the ferromagnetic material of the material layer and contains iron monoxide and/or triiron tetraoxid. The material layer is produced from a green body, which Is sintered under a reducing atmosphere.

Abstract: In a method for producing a material sheet, in particular a metallic material sheet, a green body containing solid-state particles is sintered at a sintering temperature by heating the green body during sintering at least partly using microwave energy in accordance with a defined temperature profile having a heating phase and an essentially isothermal hold phase. A temperature of the green body is ascertained contactlessly with a sensor, and a supply of heat energy is controlled as a function of the temperature of the green body. During the heating phase an average microwave power is supplied and during the hold phase another average microwave power is supplied which is less than the one average microwave power.

Abstract: In a method for producing a material layer for a rotor of a dynamoelectric rotary machine, a first suspension with binding agent and solid particles is applied through a first screen onto a base to form a first green body, thereby reproducing a first region of a first material with a first degree of strength. A second suspension with binding agent and solid particles is applied through a second screen onto a base to form an annular second green body concentrically to a layer center, thereby reproducing a second region of a second material with a second degree of strength being higher than the first degree of strength. The first and second green bodies are joined such as to form a material recess substantially at a layer center. A permanent material bond of the first and second green bodies and the solid particles is created by heating and/or by compression.

Abstract: In a method for producing a material layer with a layer thickness between 0.5 and 500 ?m, a suspension with a binding agent and solid particles is applied through a template onto a base area for obtaining a green body. The binding agent is driven out of the green body and a permanent cohesion of the solid particles is created by heating and/or by compaction.

Abstract: Various teachings herein may be used to make a bearing bush for a rotating shaft, wherein a wall of the bearing bush has a wall thickness which amounts to less than 10% of the diameter of the bearing bush. In the axial direction, the bearing bush is made from a plurality of layers connected with a material bond. Each layer has a layer thickness between 10 ?m and 200 ?m and the wall has closed cavities which are filled with a powder.

Abstract: Various embodiments of the teachings herein include a magnetic sheet stack for an electric machine comprising: a plurality of magnetic sheets electrically insulated from one another by being spaced apart from one another predominantly with a non-vanishing clearance; a respective set of ceramic spacers distributed between each of the plurality of magnetic sheets from an adjacent sheet in the stack; and a respective gas layer filling a gap between a predominant part of a planar extent of each of the plurality of magnetic sheets allowing a cooling fluid to be circulated between the adjacent sheets.

Abstract: Various embodiments include a method for manufacturing a magnetic sheet comprising: positioning a nonmagnetic sheet with recessed regions; filling the recessed regions with a soft-magnetic material using additive manufacturing; and fixing the soft-magnetic material to the sheet in a material-bonded manner.

Abstract: A complex ring element includes first and second rings arranged such that their axes lie on a shared axis and disposed adjacent to one another when viewed in the direction of the shared axis, with one of the first and second rings representing a shaft of a rotor or being connected to a shaft of the rotor. A connecting element made of metal interconnects the first and second rings of metal such that outer peripheral surfaces of the first and second rings are partially overlapped when viewed in the direction of the shared axis. The connecting element is configured to extend circumferentially as viewed in the peripheral direction about the shared axis and is produced by an additive application method.

Abstract: Various embodiments of the teachings herein include an electrical sheet for an electric machine, the electrical sheet comprises: two plates of a ferromagnetic material, the two plates arranged parallel to one another at a distance from one another forming an interior between the two; and a fluid in the interior. The two plates are connected to one another at respective edges circumferentially in a fluid-tight manner.

Abstract: A method for manufacturing an electric machine having a stack of magnetic laminations including a stack of green blanks. A first green blank of the stack is printed. A separating layer is applied to the first green blank. At least a second green blank of a magnetic lamination is printed onto the first green blank with the separating layer. The green blanks are jointly sintered.