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: A dynamoelectric rotary machine includes a stator with a stator winding and a rotor. The rotor includes an at least substantially cylindrical recess for receiving a shaft. The rotor includes a first material and a second material, wherein a region of the rotor in which a d-axis flux path of a magnetic flux lies is formed of the first material. The flux path caused by a magnetic stator field that can be generated by the stator winding, wherein a region of the rotor in which a q-axis flux path of the magnetic flux lies is formed of the second material.

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 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: 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 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: Various embodiments include a method for producing an electrical steel sheet comprising the following steps: placing a green body comprising a first material on a substrate; structuring a surface of the green body; and thermally treating the green body.

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: In a method for producing a material layer with a recess, 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 recess and permanent cohesion of the solid particles in the second suspension is achieved.

Abstract: A rotor for a dynamoelectric rotary machine includes a rotor stack, a plurality of permanent magnets, and a binding designed to fix the permanent magnets to the rotor stack, said binding including a binding thread. The permanent magnets each have at a surface of the permanent magnet a shape deviation designed to receive the binding thread and to comprise a conical thickening and an indentation, with a height difference between a highest point of the thickening and a lowest point of the indentation being at least 2% of a thickness of the permanent magnet and at most 20% of the thickness of the permanent magnet.

Abstract: In a method for producing a cooling structure over a surface of a housing of a dynamo-electric rotational machine, at least one material is applied in layers by an additive manufacturing method to the surface of the housing, omitting at least one predefined region. As a result of the application of material, at least two elevations are formed, with a cooling channel being formed between the two elevations.

Abstract: In a method for producing a material layer by an additive process, a first suspension with binding agent and solid particles is applied through a first template onto a base area to obtain a first green body, thereby reproducing by the first template a first material region of a first material to form a magnetic flux-conductive region with a first magnetic permeability ?r>50. A second suspension with binding agent and solid particles is applied through a second template onto a base area to obtain a second green body, thereby reproducing by the second template a second material region of a second material to form a flux-blocking region with a second magnetic permeability ?r<5. The first and second green bodies are joined and a permanent, material-bonded cohesion between the first and second green bodies and the solid particles is created by heating and/or by compaction.

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.