Patents by Inventor Stefan Künzel
Stefan Künzel 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).
-
Patent number: 11726446Abstract: A drive controller controls an electric drive of an electric machine receiving electric energy via a converter. The drive controller has a normal operating mode and a special operating mode. In the special operating mode, the drive controller determines control signals for the converter and rotates the rotor shaft first at a starting rotational speed. The rotor shaft then coasts without an applied external force, with the drive controller determining from raw signals continuously received from a position sensor raw positions of the rotor shaft, and determining therefrom correction variables for use in the normal operating mode. In the normal operating mode, the drive controller determines from continuously received raw signals in combination with the correction variables determined in the special operating mode an actual position of the rotor shaft and controls the converter with control signals based on the actual position or rotational speed of the electrical machine.Type: GrantFiled: November 19, 2018Date of Patent: August 15, 2023Assignee: Siemens AktiengesellschaftInventor: Stefan Künzel
-
Patent number: 10972034Abstract: In a method and a compensation arrangement for compensating detent torques of identically constructed synchronous motors, a no-load detent torque and a bad detent torque are measured on a reference motor as a function of a rotor position relative to a stator. A differential detent torque for the reference motor is determined by subtracting the measured no-load detent torque from each measured bad detent torque, and an operating-point-dependent spectral component of the differential detent torque is determined, A model function modeling the spectral component as a function of the operating point is then formed, and a first compensation current, which generates a compensation torque that compensates a detent torque at the instantaneous operating point with a value of the model function, is superimposed for each of the identically constructed synchronous motors on a setpoint current when operating at an instantaneous operating point in a predetermined first operating range.Type: GrantFiled: December 3, 2019Date of Patent: April 6, 2021Assignee: SIEMENS AKTIENGESELLSCHAFTInventor: Stefan Künzel
-
Publication number: 20210072722Abstract: A drive controller controls an electric drive of an electric machine receiving electric energy via a converter. The drive controller has a normal operating mode and a special operating mode. In the special operating mode, the drive controller determines control signals for the converter and rotates the rotor shaft first at a starting rotational speed. The rotor shaft then coasts without an applied external force, with the drive controller determining from raw signals continuously received from a position sensor raw positions of the rotor shaft, and determining therefrom correction variables for use in the normal operating mode. In the normal operating mode, the drive controller determines from continuously received raw signals in combination with the correction variables determined in the special operating mode an actual position of the rotor shaft and controls the converter with control signals based on the actual position or rotational speed of the electrical machine.Type: ApplicationFiled: November 19, 2018Publication date: March 11, 2021Applicant: Siemens AktiengesellschaftInventor: STEFAN KÜNZEL
-
Publication number: 20200177119Abstract: In a method and a compensation arrangement for compensating detent torques of identically constructed synchronous motors, a no-load detent torque and a bad detent torque are measured on a reference motor as a function of a rotor position relative to a stator. A differential detent torque for the reference motor is determined by subtracting the measured no-load detent torque from each measured bad detent torque, and an operating-point-dependent spectral component of the differential detent torque is determined, A model function modeling the spectral component as a function of the operating point is then formed, and a first compensation current, which generates a compensation torque that compensates a detent torque at the instantaneous operating point with a value of the model function, is superimposed for each of the identically constructed synchronous motors on a setpoint current when operating at an instantaneous operating point in a predetermined first operating range.Type: ApplicationFiled: December 3, 2019Publication date: June 4, 2020Applicant: Siemens AktiengesellschaftInventor: Stefan Künzel
-
Patent number: 10528027Abstract: A method for attenuating load oscillations in a load mechanism having a controlled drive, wherein a load is coupled mechanically to a motor via a spring element, includes determining an actual motor torque value, determining an actual angular velocity value, determining a motor inertial torque, calculating a spring torque from the actual angular velocity value, the motor inertial torque and the actual motor torque value, and supplying the calculated spring torque to an attenuator connection for attenuating the load oscillations.Type: GrantFiled: August 31, 2016Date of Patent: January 7, 2020Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Stefan Künzel, Carsten Hamm
-
Publication number: 20180259933Abstract: A method for attenuating load oscillations in a load mechanism having a controlled drive, wherein a load is coupled mechanically to a motor via a spring element, includes determining an actual motor torque value, determining an actual angular velocity value, determining a motor inertial torque, calculating a spring torque from the actual angular velocity value, the motor inertial torque and the actual motor torque value, and supplying the calculated spring torque to an attenuator connection for attenuating the load oscillations.Type: ApplicationFiled: August 31, 2016Publication date: September 13, 2018Applicant: SIEMENS AKTIENGESELLSCHAFTInventors: Stefan Künzel, CARSTEN Hamm
-
Patent number: 9835116Abstract: An internal combustion engine for a motor vehicle is disclosed. The engine has at least two combustion chambers and an exhaust gas tract with at least one exhaust gas duct associated with the combustion chambers and through which exhaust gas from the combustion chambers can flow to guide the exhaust gas to a turbine of an exhaust gas turbocharger. An exhaust gas return line branches off the exhaust gas duct and has an adjustable shut-off element, by which a respective cross section, through which exhaust gas can flow, of the exhaust gas recirculation line and the exhaust gas duct can be adjusted. The internal combustion engine can be operated in a cylinder shut-down mode, in which introduction of fuel into a first of the combustion chambers is prevented and introduction of fuel into the second combustion chamber takes place. A method for operating the internal combustion engine is also disclosed.Type: GrantFiled: July 8, 2014Date of Patent: December 5, 2017Assignee: DAIMLER AGInventor: Stefan Kuenzel
-
Patent number: 9784221Abstract: In an exhaust gas flow control system for an internal combustion engine, with a first exhaust gas duct and a second exhaust gas duct, through both of which exhaust gas from the internal combustion engine can flow to a turbine of an exhaust gas turbocharger with an exhaust gas recirculation line branching off the first exhaust gas duct, a shut-off element is provided which is adjustable between a closed position in which exhaust gas is prevented from flowing into the exhaust gas recirculation line and directing it via a communication passage into the second exhaust gas duct, and at least a first open position in which exhaust gas is directed out of the first exhaust gas duct into the exhaust gas recirculation line while blocking the communication passage between the first and second exhaust gas ducts and a second open position wherein both the first and the second exhaust gas ducts as well as the communication passage between the two ducts is open but the recirculation line is closed.Type: GrantFiled: August 17, 2015Date of Patent: October 10, 2017Assignee: DAIMLER AGInventor: Stefan Kuenzel
-
Patent number: 9712095Abstract: A first active part of a poly-phase electric machine is connected to a converter having a control facility. The control facility updates a base commutation angle using the target speed value and determines direct-axis and quadrature-axis component values of currents and a commutation angle supplied to the machine. Target and component quadrature-axis values are provided to a quadrature-axis portion of a current controller that determines a target value of the quadrature-axis voltage component. Target and component current values are supplied to a direct-axis portion of the current controller, which determines a target value of the direct-axis voltage component therefrom. The target value of the direct-axis and quadrature-axis voltage components and the commutation angle are used to determine the target output voltages provided to the converter. A damping commutation angle determined using target values of the quadrature-axis and direct axis voltage components is used to adjust the of the voltage.Type: GrantFiled: November 17, 2015Date of Patent: July 18, 2017Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Daniel Bönke, Michael Jäntsch, Stefan Künzel, Carsten Spindler
-
Patent number: 9628013Abstract: A control device, linear device, non-transitory computer readable medium and method by which optimal vibration damping can also be achieved in a simple manner when transferring a carrier from one segment to the next segment, where a primary part includes a plurality of sequentially consecutive segments that are each connected to a supply voltage via a respective converter, such that each of plurality of sequentially consecutive the segments receive respective currents of a three-phase system.Type: GrantFiled: November 13, 2015Date of Patent: April 18, 2017Assignee: Siemens AktiengesellschaftInventors: Daniel Boenke, Michael Jaentsch, Stefan Kuenzel, Carsten Spindler
-
Patent number: 9388720Abstract: A method for treating exhaust gas of an internal combustion engine involves introducing less fuel into at least one first cylinder of the internal combustion engine than into at least one second cylinder of the internal combustion engine. Exhaust gas emerging from the at least one first cylinder is at least partially recycled into a supply air section of the internal combustion engine. At least the exhaust gas of the at least one second cylinder is supplied to an exhaust gas after-treatment unit. An exhaust gas line, by means of which exhaust gas of the at least one first cylinder of the exhaust gas after treatment unit can be supplied, is at least partially blocked.Type: GrantFiled: July 26, 2013Date of Patent: July 12, 2016Assignee: Daimler AGInventor: Stefan Kuenzel
-
Internal Combustion Engine for a Motor Vehicle, and Method for Operating Such an Internal Combustion
Publication number: 20160169167Abstract: An internal combustion engine for a motor vehicle is disclosed. The engine has at least two combustion chambers and an exhaust gas tract with at least one exhaust gas duct associated with the combustion chambers and through which exhaust gas from the combustion chambers can flow to guide the exhaust gas to a turbine of an exhaust gas turbocharger. An exhaust gas return line branches off the exhaust gas duct and has an adjustable shut-off element, by which a respective cross section, through which exhaust gas can flow, of the exhaust gas recirculation line and the exhaust gas duct can be adjusted. The internal combustion engine can be operated in a cylinder shut-down mode, in which introduction of fuel into a first of the combustion chambers is prevented and introduction of fuel into the second combustion chamber takes place. A method for operating the internal combustion engine is also disclosed.Type: ApplicationFiled: July 8, 2014Publication date: June 16, 2016Applicant: Daimler AGInventor: Stefan KUENZEL -
Publication number: 20160141992Abstract: A control device, linear device, non-transitory computer readable medium and method by which optimal vibration damping can also be achieved in a simple manner when transferring a carrier from one segment to the next segment, where a primary part includes a plurality of sequentially consecutive segments that are each connected to a supply voltage via a respective converter, such that each of plurality of sequentially consecutive the segments receive respective currents of a three-phase system.Type: ApplicationFiled: November 13, 2015Publication date: May 19, 2016Inventors: Daniel BOENKE, Michael JAENTSCH, Stefan KUENZEL, Carsten SPINDLER
-
Publication number: 20160141993Abstract: A first active part of a poly-phase electric machine is connected to a converter having a control facility. The control facility updates a base commutation angle using the target speed value and determines direct-axis and quadrature-axis component values of currents and a commutation angle supplied to the machine. Target and component quadrature-axis values are provided to a quadrature-axis portion of a current controller that determines a target value of the quadrature-axis voltage component. Target and component current values are supplied to a direct-axis portion of the current controller, which determines a target value of the direct-axis voltage component therefrom. The target value of the direct-axis and quadrature-axis voltage components and the commutation angle are used to determine the target output voltages provided to the converter. A damping commutation angle determined using target values of the quadrature-axis and direct axis voltage components is used to adjust the of the voltage.Type: ApplicationFiled: November 17, 2015Publication date: May 19, 2016Applicant: SIEMENS AKTIENGESELLSCHAFTInventors: DANIEL BÖNKE, MICHAEL JÄNTSCH, STEFAN KÜNZEL, CARSTEN SPINDLER
-
Publication number: 20150369181Abstract: In an exhaust gas flow control system for an internal combustion engine, with a first exhaust gas duct and a second exhaust gas duct, through both of which exhaust gas from the internal combustion engine can flow to a turbine of an exhaust gas turbocharger with an exhaust gas recirculation line branching off the first exhaust gas duct, a shut-off element is provided which is adjustable between a closed position in which exhaust gas is prevented from flowing into the exhaust gas recirculation line and directing it via a communication passage into the second exhaust gas duct, and at least a first open position in which exhaust gas is directed out of the first exhaust gas duct into the exhaust gas recirculation line while blocking the communication passage between the first and second exhaust gas ducts and a second open position wherein both the first and the second exhaust gas ducts as well as the communication passage between the two ducts is open but the recirculation line is closed.Type: ApplicationFiled: August 17, 2015Publication date: December 24, 2015Applicant: DAIMLER AGInventor: Stefan KUENZEL
-
Patent number: 9146166Abstract: A method for determining an electrical torque of an electrical machine includes determining an electrical torque in a first speed range with a first algorithm, and determining the electrical torque in a second speed range with a second algorithm which differs from the first algorithm. An upper limit of the second speed range is slightly higher than a lower limit of the first speed range. An apparatus is provided to determine the electrical torque of the electrical machine with the aforedescribed method.Type: GrantFiled: July 23, 2013Date of Patent: September 29, 2015Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Hans-Georg Köpken, Stefan Künzel, Hubert Schierling, Günter Schwesig, Heiko Zatocil
-
Publication number: 20150260068Abstract: A method for treating exhaust gas of an internal combustion engine involves introducing less fuel into at least one first cylinder of the internal combustion engine than into at least one second cylinder of the internal combustion engine. Exhaust gas emerging from the at least one first cylinder is at least partially recycled into a supply air section of the internal combustion engine. At least the exhaust gas of the at least one second cylinder is supplied to an exhaust gas after-treatment unit. An exhaust gas line, by means of which exhaust gas of the at least one first cylinder of the exhaust gas after treatment unit can be supplied, is at least partially blocked.Type: ApplicationFiled: July 26, 2013Publication date: September 17, 2015Inventor: Stefan Kuenzel
-
Patent number: 8729845Abstract: A method and device for controlling an electric motor, in particular a machine tool drive, wherein during a sensorless open-loop control mode of operation of the electric motor the speed and the torque are determined from the motor current and the motor voltage, and the moment of inertia of the electric motor torque are determined from the determined motor current and the determined motor voltage, wherefrom then a control torque is determined, which is then associated with an open-loop torque control value and supplied as the torque setpoint value to a control element for setting the motor current and/or the motor voltage in the open-loop mode of operation. As long as the speed is below a minimum speed, the control element receives as input variable a control or pilot control torque generated from a predefined moment of inertia for a sensorless closed-loop control mode of operation of the electric motor.Type: GrantFiled: February 27, 2012Date of Patent: May 20, 2014Assignee: Siemens AktiengesellschaftInventors: Stefan Künzel, Nico Spieckermann
-
Publication number: 20140026681Abstract: A method for determining an electrical torque of an electrical machine includes determining an electrical torque in a first speed range with a first algorithm, and determining the electrical torque in a second speed range with a second algorithm which differs from the first algorithm. An upper limit of the second speed range is slightly higher than a lower limit of the first speed range. An apparatus is provided to determine the electrical torque of the electrical machine with the aforedescribed method.Type: ApplicationFiled: July 23, 2013Publication date: January 30, 2014Applicant: Siemens AktiengesellschaftInventors: Hans-Georg Köpken, Stefan Künzel, Hubert Schierling, Günter Schwesig, Heiko Zatocil
-
Publication number: 20120217917Abstract: A method and device for controlling an electric motor, in particular a machine tool drive, wherein during a sensorless open-loop control mode of operation of the electric motor the speed and the torque are determined from the motor current and the motor voltage, and the moment of inertia of the electric motor torque are determined from the determined motor current and the determined motor voltage, wherefrom then a control torque is determined, which is then associated with an open-loop torque control value and supplied as the torque setpoint value to a control element for setting the motor current and/or the motor voltage in the open-loop mode of operation. As long as the speed is below a minimum speed, the control element receives as input variable a control or pilot control torque generated from a predefined moment of inertia for a sensorless closed-loop control mode of operation of the electric motor.Type: ApplicationFiled: February 27, 2012Publication date: August 30, 2012Applicant: Siemens AktiengesellschaftInventors: Stefan KÜNZEL, Nico SPIECKERMANN