Patents by Inventor Dietmar Stoiber
Dietmar Stoiber 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).
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Patent number: 11268587Abstract: An active vibration damper includes a lower outer wall for placement on a floor, and front and rear outer walls, with the front and/or rear outer wall including first and second receptacles in an outer side thereof. The first receptacle receives a permanent magnet and is pot-shaped to maintain a closed configuration of the front and/or rear outer wall. A primary part of an electrical linear actuator is fixed at least on an inside of the lower outer wall, and a secondary part is arranged above the primary part and acted upon by the primary part. Retaining elements fixed to an inside of the upper outer wall movably hold the secondary part for displacement in a substantially linear manner in a left-right direction when the primary part is correspondingly impinged on. A magnetic back iron yoke is received in the second receptacle at the height of the secondary part.Type: GrantFiled: September 18, 2019Date of Patent: March 8, 2022Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Jochen Bretschneider, Christoph Fritsch, Torsten Schür, Dietmar Stoiber
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Publication number: 20210356013Abstract: An active vibration damper includes a lower outer wall for placement on a floor, and front and rear outer walls, with the front and/or rear outer wall including first and second receptacles in an outer side thereof. The first receptacle receives a permanent magnet and is pot-shaped to maintain a closed configuration of the front and/or rear outer wall. A primary part of an electrical linear actuator is fixed at least on an inside of the lower outer wall, and a secondary part is arranged above the primary part and acted upon by the primary part. Retaining elements fixed to an inside of the upper outer wall movably hold the secondary part for displacement in a substantially linear manner in a left-right direction when the primary part is correspondingly impinged on. A magnetic back iron yoke is received in the second receptacle at the height of the secondary part.Type: ApplicationFiled: September 18, 2019Publication date: November 18, 2021Applicant: SIEMENS AKTIENGESELLSCHAFTInventors: JOCMEN BRETSCHNEIDER, CHRISTOPH FRITSCH, TORESTEN SCHÜR, DIETMAR STOIBER
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Patent number: 10921108Abstract: In a method for monitoring a magnetic bearing device for an electric rotating machine, a first pair of at least essentially diametrically opposed sensors and a second pair of at least essentially diametrically opposed sensors are arranged in offset relation about an angle. A distance is determined between each of the sensors and a body of rotation arranged inside the first and second pairs of sensors. A first average distance is determined from distance values of the first pair of sensors and a second average distance is determined from distance values of the second pair of sensors. A first change in the first average distance is captured and a second change in the second average distance is captured. The first and second changes are compared and a warning signal is outputted when a difference between the first and second changes exceeds a limit value.Type: GrantFiled: January 14, 2019Date of Patent: February 16, 2021Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Joachim Denk, Bert-Uwe Köhler, Dietmar Stoiber, Frank Viering
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Patent number: 10744608Abstract: A device for damping vibrations of a machine, in particular for damping vibrations of a machine tool, wherein the device includes a first linear motor primary part, a pendulum mass, mounted via at least one supporting sheet-metal assembly provide a relative motion of the pendulum mass along the first linear motor primary part, a first linear motor secondary part fastened to the pendulum mass such that the pendulum mass is actuated via the first linear motor primary part to dampen vibrations of the machine, a second linear motor primary part, and a second linear motor secondary part fastened to the pendulum mass such that the pendulum mass is additionally actuated via the second linear motor primary part to dampen vibrations of the machine so as to achieve an especially compact device that makes it possible to dampen vibrations of machines, in particular machine tools, effectively and without maintenance.Type: GrantFiled: February 16, 2017Date of Patent: August 18, 2020Assignee: Siemen AktiengesellschaftInventors: Markus Stephan Haschka, Elmar Schaefers, Torsten Schuer, Dietmar Stoiber
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Patent number: 10566921Abstract: An induction machine includes a stator and a rotor, wherein a stator winding is arranged within the stator, a control device controls a converter such that the converter connects the stator winding to a power-supply network such that a stator current flows within the stator winding, and the stator current has a field-forming current component and a torque-forming current component, where the control device controls the converter such that, during load periods, a torque acts between the stator and the rotor, controls the converter during periods of rest such that a torque acts between the stator and the rotor, controls the converter at least at the beginning of the periods of rest such that the field-forming current component has a nominal value, and controls the converter during the load periods such that the field-forming current component has a lower value than the nominal value.Type: GrantFiled: June 27, 2018Date of Patent: February 18, 2020Assignee: Siemens AktiengesellschaftInventors: Joerg Reh, Carsten Spindler, Dietmar Stoiber, Bernd Wedel
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Publication number: 20190219377Abstract: In a method for monitoring a magnetic bearing device for an electric rotating machine, a first pair of at least essentially diametrically opposed sensors and a second pair of at least essentially diametrically opposed sensors are arranged in offset relation about an angle. A distance is determined between each of the sensors and a body of rotation arranged inside the first and second pairs of sensors. A first average distance is determined from distance values of the first pair of sensors and a second average distance is determined from distance values of the second pair of sensors. A first change in the first average distance is captured and a second change in the second average distance is captured. The first and second changes are compared and a warning signal is outputted when a difference between the first and second changes exceeds a limit value.Type: ApplicationFiled: January 14, 2019Publication date: July 18, 2019Applicant: Siemens AktiengesellschaftInventors: Joachim Denk, Bert-Uwe Köhler, Dietmar Stoiber, Frank Viering
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Patent number: 10326344Abstract: The disclosure relates to a polyphase transverse flux machine including a stator and a rotor configured to rotate relative to the stator about an axis in a circumferential direction. The transverse flux machine includes an electrical line running along a plurality of yokes in the circumferential direction, and a pair of permanent magnet arrays running in parallel in the circumferential direction. A plurality of return path bodies is provided in the stator, wherein each yoke has an associated return path body at a distance from the associated yoke in the radial direction. The magnetization direction of the permanent magnets in the permanent magnet arrays changes in such a way that a closed magnetic flux repeatedly occurs at each yoke during rotation of the rotor. The closed magnetic flux runs from one permanent magnet array across a respective yoke to the other permanent magnet array, and from there, across the associated return path body, back to the first-mentioned permanent magnet array.Type: GrantFiled: April 14, 2016Date of Patent: June 18, 2019Assignee: Siemens AktiengesellschaftInventors: Jens Hamann, Dietmar Stoiber
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Publication number: 20190047103Abstract: A device for damping vibrations of a machine, in particular for damping vibrations of a machine tool, wherein the device includes a first linear motor primary part, a pendulum mass, mounted via at least one supporting sheet-metal assembly provide a relative motion of the pendulum mass along the first linear motor primary part, a first linear motor secondary part fastened to the pendulum mass such that the pendulum mass is actuated via the first linear motor primary part to dampen vibrations of the machine, a second linear motor primary part, and a second linear motor secondary part fastened to the pendulum mass such that the pendulum mass is additionally actuated via the second linear motor primary part to dampen vibrations of the machine so as to achieve an especially compact device that makes it possible to dampen vibrations of machines, in particular machine tools, effectively and without maintenance.Type: ApplicationFiled: February 16, 2017Publication date: February 14, 2019Applicant: Siemens AktiengesellschaftInventors: Markus Stephan HASCHKA, Elmar SCHAEFERS, Torsten SCHUER, Dietmar STOIBER
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Publication number: 20190006975Abstract: An induction machine includes a stator and a rotor, wherein a stator winding is arranged within the stator, a control device controls a converter such that the converter connects the stator winding to a power-supply network such that a stator current flows within the stator winding, and the stator current has a field-forming current component and a torque-forming current component, where the control device controls the converter such that, during load periods, a torque acts between the stator and the rotor, controls the converter during periods of rest such that a torque acts between the stator and the rotor, controls the converter at least at the beginning of the periods of rest such that the field-forming current component has a nominal value, and controls the converter during the load periods such that the field-forming current component has a lower value than the nominal value.Type: ApplicationFiled: June 27, 2018Publication date: January 3, 2019Inventors: Joerg Reh, Carsten SPINDLER, Dietmar STOIBER, Bernd WEDEL
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Publication number: 20180331607Abstract: The disclosure relates to a polyphase transverse flux machine including a stator and a rotor configured to rotate relative to the stator about an axis in a circumferential direction. The transverse flux machine includes an electrical line running along a plurality of yokes in the circumferential direction, and a pair of permanent magnet arrays running in parallel in the circumferential direction. A plurality of return path bodies is provided in the stator, wherein each yoke has an associated return path body at a distance from the associated yoke in the radial direction. The magnetization direction of the permanent magnets in the permanent magnet arrays changes in such a way that a closed magnetic flux repeatedly occurs at each yoke during rotation of the rotor. The closed magnetic flux runs from one permanent magnet array across a respective yoke to the other permanent magnet array, and from there, across the associated return path body, back to the first-mentioned permanent magnet array.Type: ApplicationFiled: April 14, 2016Publication date: November 15, 2018Inventors: Jens Hamann, Dietmar Stoiber
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Patent number: 9740179Abstract: A control device of a processing machine actuates an axle drive of the processing machine commensurate with a reference displacement movement, displacing a mechanical structure of the processing machine accordingly. The control device determines an absolute movement of the mechanical structure in space and therefrom, taking into account the reference displacement movement of the mechanical structure, a compensation movement for a compensating mass damping a vibration of the mechanical structure. Arranged on the mechanical structure is a compensating drive which acts on the compensating mass. The control device actuates the compensating drive in accordance with the compensation movement, displacing the compensating mass relative to the mechanical structure and thereby damping the vibration of the mechanical structure.Type: GrantFiled: September 28, 2012Date of Patent: August 22, 2017Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Uwe Ladra, Elmar Schäfers, Torsten Schür, Dietmar Stoiber
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Patent number: 9631516Abstract: The invention relates to a drive (1) of a tail rotor (12) of a helicopter (10) by a permanently excited transversal flux machine in duplex arrangement in such a way that between two stators (4), which each have a toroidal winding system (8), there is arranged a disc-shaped impeller (5), which has permanent magnets (15) and on the outer circumference of which propeller blades (14) of the tail rotor (12) are arranged.Type: GrantFiled: July 15, 2011Date of Patent: April 25, 2017Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Jens Hamann, Hans-Georg Köpken, Dietmar Stoiber
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Patent number: 9217467Abstract: In a method for operating a three-phase inverter of a converter-fed magnetic bearing, two coils are connected to respective outputs of the three-phase inverter at one end and are connected to each other and to a third output of the three-phase inverter at the other end. A variable control current is injected into the third output. A constant bias current flows between the respective outputs and thus serially through the two coils. The control current is divided among the two respective outputs so as to flow parallel through the two coils. This arrangement significantly reduces the effective current load of the three-phase inverter and significantly increases the slew rate of the control current.Type: GrantFiled: April 12, 2012Date of Patent: December 22, 2015Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Joachim Denk, Hans-Georg Köpken, Dietmar Stoiber, Frank Viering
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Publication number: 20140339940Abstract: In a method for operating a three-phase inverter of a converter-fed magnetic bearing, two coils are connected to respective outputs of the three-phase inverter at one end and are connected to each other and to a third output of the three-phase inverter at the other end. A variable control current is injected into the third output. A constant bias current flows between the respective outputs and thus serially through the two coils. The control current is divided among the two respective outputs so as to flow parallel through the two coils. This arrangement significantly reduces the effective current load of the three-phase inverter and significantly increases the slew rate of the control current.Type: ApplicationFiled: April 12, 2012Publication date: November 20, 2014Applicant: Siemens AktiengesellschaftInventors: Joachim Denk, Hans-Georg Köpken, Dietmar Stoiber, Frank Viering
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Patent number: 8763771Abstract: An active oscillation damper has a balancing mass which is movable relative to an oscillating mechanical structure. The control device then determines a compensation movement for the balancing mass based on a determined three-dimensional absolute motion of the mechanical structure. A balancing drive, arranged on the mechanical structure and acting on the balancing mass, is activated by the control device. The balancing mass is displaced by the balancing drive relative to the mechanical structure commensurate with the determined compensation movement. The measured values supplied to the control device include actual values of the balancing drive and/or a position of the balancing mass relative to the mechanical structure and/or at least one derivative with respect to time of the position of the balancing mass relative to the mechanical structure. The three-dimensional absolute motion of the mechanical structure is determined by the control device from the aforementioned values.Type: GrantFiled: September 28, 2012Date of Patent: July 1, 2014Assignee: Siemens AktiengesellschaftInventors: Uwe Ladra, Elmar Schäfers, Torsten Schür, Dietmar Stoiber
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Publication number: 20130121831Abstract: The invention relates to a drive (1) of a tail rotor (12) of a helicopter (10) by a permanently excited transversal flux machine in duplex arrangement in such a way that between two stators (4), which each have a toroidal winding system (8), there is arranged a disc-shaped impeller (5), which has permanent magnets (15) and on the outer circumference of which propeller blades (14) of the tail rotor (12) are arranged.Type: ApplicationFiled: July 15, 2011Publication date: May 16, 2013Applicant: Siemens AktiengesellschaftInventors: Jens Hamann, Hans-Georg Köpken, Dietmar Stoiber
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Patent number: 8294314Abstract: The invention relates to a magnetic bearing control device and the use of a three-phase converter for controlling a magnetic bearing. According to the invention, a three-phase converter (70) is used for controlling a magnetic bearing (10, 66, 68), all three phase currents (40, 42, 44) of the converter (70) being used for controlling the magnetic bearing (10, 66, 68). A first solenoid of a couple of solenoids (10) of the magnetic bearing (10, 66, 68) is connected to a first (U) and a third (W) phase current output of the converter (70) while a second solenoid of the couple of solenoids (10) is connected to the first (U) and a second (V) phase current output of the converter such that the couple of solenoids (10) can be differently controlled by means of said one converter (70). The converter (70) can also be connected to magnetic bearings that already have a bias winding, which is advantageous for retrofitting such existing magnetic bearings, for example.Type: GrantFiled: October 2, 2007Date of Patent: October 23, 2012Assignee: Siemens AktiengesellschaftInventors: Joachim Denk, Hans-Georg Köpken, Dietmar Stoiber, Bernd Wedel
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Patent number: 8080951Abstract: A drive apparatus with at least one synchronous motor, a converter and a mechanical energy buffer able to be fed from an energy supply network, which, for converting mechanical energy into electrical current, includes a first asynchronous machine, and a method of operation for such a drive apparatus are specified, with which or in which the energy buffer, especially its first asynchronous machine is directly electrically connected via a switchover device to the at least one synchronous motor, so that the converter included in the drive apparatus is bypassed for such a switch position of the switchover device and the converter accordingly does not have to be designed for currents which flow in such a switch position of the switchover device.Type: GrantFiled: April 23, 2009Date of Patent: December 20, 2011Assignee: Siemens AktiengesellschaftInventors: Wolfram Behr, Jens Hamann, Markus Knorr, Jürgen Krejtschi, Elmar Schäfers, Dietmar Stoiber, Wolfgang Wolter
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Patent number: 8063598Abstract: The invention relates to a synchronous motor (12) with a number of stator coils (15), with a rotor (16) with at least one permanent magnet (17), which induces a rotor magnetic field in a useful flux direction and with at least one coil winding (20), which is fitted on the rotor in order to induce a resultant magnetic field as a result of an alternating magnetic fields which is applied with the aid of the stator coils, in the direction of a winding axis of the coil winding, so that a resultant inductance of the stator coils (15) with respect to a direction of the winding axis is different given different positions of the rotor (16).Type: GrantFiled: July 26, 2007Date of Patent: November 22, 2011Assignee: Siemens AktiengesellschaftInventors: Dietmar Stoiber, Bernd Wedel
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Patent number: 8040017Abstract: A piezo actuator includes an adaptation element, which is configured to adapt the piezo actuator to a controller for inductive loads, particularly to a converter for actuating inductive loads. The adaptation element allows use of controllers or converters of numerical control systems, which normally are used for actuating servo motors. Therefore it is no longer necessary to provide specially designed hardware for the actuation of piezo actuators, but instead the above-mentioned controllers can be used. Furthermore, as a result of the adaptation element, the piezo actuators can be integrated in the bus of the numerical control system. This allows communication in real time via the NC bus.Type: GrantFiled: April 13, 2007Date of Patent: October 18, 2011Assignee: Siemens AktiengesellschaftInventors: Uwe Ladra, Elmar Schäfers, Dietmar Stoiber, Bernd Wedel