Patents by Inventor Rolf Vollmer

Rolf Vollmer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220005645
    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.
    Type: Application
    Filed: October 10, 2019
    Publication date: January 6, 2022
    Applicant: Siemens Aktiengesellschaft
    Inventors: Jörg Buschbeck, Gotthard Rieger, Carsten Schuh, Thomas Soller, Rolf Vollmer
  • Patent number: 11215235
    Abstract: A coupling for connection of an encoder to an electrical machine includes an encoder shaft end piece for coupling to a shaft of the encoder, and a machine shaft end piece for coupling to a shaft of the electrical machine. At least one of the end pieces has a carrier which is formed with a cavity filled with granular material, preferably steel powder, to effect a dampening of vibrations and impacts.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: January 4, 2022
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Rolf Vollmer, Matthias Braun
  • Publication number: 20210379656
    Abstract: Various embodiments include a method for sintering a multicomponent sinter product comprising: forming a first component consisting of a first material printed with one or more recesses for a second component; forming the second component consisting of a second material; inserting at least a portion of the second component into the one or more recesses of the first component; and shrinking the first component and the second component onto one another by sintering.
    Type: Application
    Filed: September 6, 2019
    Publication date: December 9, 2021
    Applicant: Siemens Aktiengesellschaft
    Inventors: Carsten Schuh, Thomas Soller, Rolf Vollmer
  • Publication number: 20210320571
    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.
    Type: Application
    Filed: July 10, 2019
    Publication date: October 14, 2021
    Applicant: Siemens Aktiengesellschaft
    Inventors: REINER SEUFERT, ROLF VOLLMER
  • Publication number: 20210281126
    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.
    Type: Application
    Filed: July 10, 2019
    Publication date: September 9, 2021
    Applicant: Siemens Aktiengesellschaft
    Inventor: Rolf Vollmer
  • Patent number: 11031838
    Abstract: A housing includes a first housing unit which includes a first bearing shield, a flange, a stator laminated core arranged between the first bearing shield and the flange, and a coating which is made of stainless steel and applied by an additive manufacturing method so as to cover the first bearing shield, the stator laminated core, and the flange and thereby form a unitary structure.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: June 8, 2021
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Eric Huter, Reiner Seufert, Rolf Vollmer
  • Publication number: 20210126514
    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.
    Type: Application
    Filed: July 10, 2019
    Publication date: April 29, 2021
    Applicant: Siemens Aktiengesellschaft
    Inventor: Rolf Vollmer
  • Patent number: 10965200
    Abstract: A rotating electric machine includes a stator having a segment pair of first and second active part segments, and a rotor mounted for rotation about an axis of rotation relative to the stator and including a ring-shaped reaction element extending along a reaction element circle about the axis of rotation, with a circular arc of the reaction element circle running between the two active part segments. The rotor includes magnetizable regions arranged in series along the reaction element circle, with a non-magnetic region being arranged between two adjacent magnetizable regions. The first active part segment of the segment pair of the stator includes a number of electromagnets arranged in series along a course of the circular arc, and the second active part segment of the segment pair of the stator includes a number of permanent magnets arranged in series along the course of the circular arc.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: March 30, 2021
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Reiner Seufert, Rolf Vollmer
  • Publication number: 20210036590
    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.
    Type: Application
    Filed: March 27, 2019
    Publication date: February 4, 2021
    Applicant: Siemens Aktiengesellschaft
    Inventors: Erich Bott, REINER SEUFERT, ROLF VOLLMER
  • Publication number: 20210006142
    Abstract: A rotating electric machine includes a stator having a segment pair of first and second active part segments, and a rotor mounted for rotation about an axis of rotation relative to the stator and including a ring-shaped reaction element extending along a reaction element circle about the axis of rotation, with a circular arc of the reaction element circle running between the two active part segments. The rotor includes magnetizable regions arranged in series along the reaction element circle, with a non-magnetic region being arranged between two adjacent magnetizable regions. The first active part segment of the segment pair of the stator includes a number of electromagnets arranged in series along a course of the circular arc, and the second active part segment of the segment pair of the stator includes a number of permanent magnets arranged in series along the course of the circular arc.
    Type: Application
    Filed: December 18, 2018
    Publication date: January 7, 2021
    Applicant: Siemens Aktiengesellschaft
    Inventors: REINER SEUFERT, ROLF VOLLMER
  • Patent number: 10873228
    Abstract: A bell-shaped rotor of an electric machine includes a cylindrical segment and a conical segment, wherein the cylindrical segment has magnetically active regions and nonmagnetic regions, where the rotor is produced at least partially via an additive production method, where the electric machine includes, in particular, an outer stator, an inner stator, which is arranged concentric to the outer stator within the outer stator, and the rotor, which is arranged concentric to the outer stator and the inner stator between the outer stator and the inner stator.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: December 22, 2020
    Assignee: Siemens Aktiengesellschaft
    Inventors: Benjamin Volkmuth, Rolf Vollmer
  • Patent number: 10581290
    Abstract: A reluctance armature includes a shaft received in a shaft hole in a torsion-proof manner. At least one carrier body is disposed around the shaft and has radial sides as viewed in a circumferential direction. Part segments are arranged on the radial sides of the carrier body and made of anisotropic soft-magnetic material to thereby establish an armature segment which, as viewed in an axial direction, is disposed between two edge elements and forms a central section.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: March 3, 2020
    Assignee: Siemens Aktiengesellschaft
    Inventors: Daniel Mader, Rolf Vollmer
  • Publication number: 20200044521
    Abstract: The invention relates to a method for producing a rotor of an electric machine, which rotor is preferably designed as a squirrel-cage rotor. The end rings and/or squirrel-cage bars are produced by means of a metal powder application method. The invention further relates to an end ring for a rotor of an electric machine, said end ring in particular being produced by means of said method.
    Type: Application
    Filed: February 2, 2018
    Publication date: February 6, 2020
    Inventors: Klaus Büttner, Reiner Seufert, Rolf Vollmer
  • Publication number: 20200032850
    Abstract: A coupling for connection of an encoder to an electrical machine includes an encoder shaft end piece for coupling to a shaft of the encoder, and a machine shaft end piece for coupling to a shaft of the electrical machine. At least one of the end pieces has a carrier which is formed with a cavity filled with granular material, preferably steel powder, to effect a dampening of vibrations and impacts.
    Type: Application
    Filed: February 9, 2018
    Publication date: January 30, 2020
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: ROLF VOLLMER, MATTHIAS BRAUN
  • Patent number: 10447101
    Abstract: A permanent magnet for connecting with a connection device of an external rotor machine includes a north pole and a south pole as magnetic poles. A magnetic field runs from the south pole to the north pole, with a cross section of the permanent magnet having an envelope with a concave section. The envelope has, in the form of a sickle, the concave section and a convex section. The permanent magnet runs in an arcuate manner along the convex section, and the magnetic poles run in an arcuate manner along the concave section.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: October 15, 2019
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Erich Bott, Reiner Seufert, Rolf Vollmer
  • Patent number: 10236730
    Abstract: An active part for an electric machine can be configured as a stator or a rotor and includes at least two slots for arranging an electric coil winding of an electric coil. Arranged between the two slots is a crosspiece which is made of a material for conducting a magnetic flux through the electric coil which surrounds the crosspiece. The material has, at least in one area, magnetic anisotropy with an easy magnetization axis, which is oriented parallel or at least at an angle of less than 25° with respect to a coil axis of the coil, and a hard magnetization axis. The crosspiece is configured to form for each of the slots a slot wall which contains the material. The crosspiece includes a core which is made of an isotropic soft-magnetic material.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: March 19, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventors: Ralf Fischer, Korbinian Petermaier, Rolf Vollmer
  • Patent number: 10211691
    Abstract: A permanent magnet having end surfaces and an envelope curve shaped as a biconvex lens having first and second convex portions, magnetization running in an arcuate manner along the first convex portion between a north pole and a south poles. The permanent magnet runs along the second convex portion in an arcuate manner, and at least one of the magnet's end surfaces within the envelope curve has a connection surface adapted for connecting with a connection device by fusing or by positive engagement. The rotor is preferably pressed onto the shaft of the rotor after the connection device is formed around a connection surface of the permanent magnets by injection molding.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: February 19, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventors: Erich Bott, Reiner Seufert, Rolf Vollmer
  • Patent number: 10199888
    Abstract: A reluctance rotor of a dynamoelectric rotary machine has an even number of poles constructed of a material having structural magnetic anisotropy. The magnetic anisotropy of the material is characterized by a first magnetic resistance, a magnetic permeability of ?r>20 and a saturation polarization of >1T in a first spatial direction, and by a second magnetic resistance which is greater than the first magnetic resistance with a magnetic permeability of ?r<1.6 in spatial directions perpendicular to the first spatial direction.
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: February 5, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventor: Rolf Vollmer
  • Publication number: 20190027984
    Abstract: A permanent magnet for connecting with a connection device of an external rotor machine includes a north pole and a south pole as magnetic poles. A magnetic field runs from the south pole to the north pole, with a cross section of the permanent magnet having an envelope with a concave section. The envelope has, in the form of a sickle, the concave section and a convex section. The permanent magnet runs in an arcuate manner along the convex section, and the magnetic poles run in an arcuate manner along the concave section.
    Type: Application
    Filed: November 7, 2016
    Publication date: January 24, 2019
    Applicant: Siemens Aktiengesellschaft
    Inventors: ERICH BOTT, REINER SEUFERT, ROLF VOLLMER
  • Patent number: 10135309
    Abstract: A rotor having a number of tangentially magnetized permanent magnets tangentially evenly distributed and arranged both in the center region and in the outer regions in the axial direction is disclosed. Flux-guiding elements between the permanent magnets guide the magnetic fields of the permanent magnets radially toward the center region of the stator. The flux-guiding elements comprise a plurality of sheets stacked on one another in the axial direction. The sheets in the outer regions are smaller than the sheets in the center region. The sheets arranged in the outer regions are surrounded on their radially outside end by a retaining apparatus. Form-fitting elements transmit centrifugal forces acting on the sheets arranged in the center region are transmitted to the sheets arranged in the outer regions.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: November 20, 2018
    Assignee: Siemens Aktiengesellschaft
    Inventors: Daniel Mader, Rolf Vollmer