Patents by Inventor Julian Roesner

Julian Roesner 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: 10574170
    Abstract: The invention relates to a method for switching off a multi-phase electric machine (110) in a motor vehicle, the multi-phase electric machine (110) comprising a rotor having a rotor winding (101) and a stator having a multi-phase stator winding (110a), wherein in a block mode (210) of the electric machine (110) a parameter influencing a synchronous generated voltage vector (Up) of a synchronous generated voltage is adjusted such that the synchronous generated voltage reaches a first threshold value (S1), wherein the block mode (210) is deactivated when the first threshold value (S1) is reached and a PWM mode (220) for applying a phase voltage with a phase voltage vector (Us) is activated, wherein the phase voltage vector (Us) and the synchronous generated voltage vector (Up) are varied in PWM mode (220) until the parameter influencing the synchronous generated voltage reaches a further threshold value (S2), wherein the phase voltage is switched off when the further threshold value (S2) is reached.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: February 25, 2020
    Assignee: SEG AUTOMOTIVE GERMANY GMBH
    Inventor: Julian Roesner
  • Patent number: 10309996
    Abstract: A method for determining the phase currents of an electric machine having a power converter, and a stator, the power converter having, for each phase, an upper branch having an upper switch and a lower branch having a lower switch, all the upper branches being connected to an upper DC voltage terminal and all the lower branches to a lower DC voltage terminal. The power converter is operated in an active rectification mode in which each upper switch is closed only as long as a phase voltage at the relevant upper switch is higher than a voltage at the upper DC voltage terminal, and each lower switch being closed only as long as a phase voltage at the relevant lower switch is lower than a voltage at the lower DC voltage terminal; phase branch currents being measured in all the lower branches.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: June 4, 2019
    Assignees: Robert Bosch GmbH, SEG Automotive Germany GmbH
    Inventors: Arunkumar Motaganahalli Srinivasamurthy, Julian Roesner
  • Publication number: 20190149079
    Abstract: The invention relates to a method for switching off a multi-phase electric machine (110) in a motor vehicle, the multi-phase electric machine (110) comprising a rotor having a rotor winding (101) and a stator having a multi-phase stator winding (110a), wherein in a block mode (210) of the electric machine (110) a parameter influencing a pole wheel voltage vector (Up) of a pole wheel voltage is adjusted such that the pole wheel voltage reaches a first threshold value (S1), wherein the block mode (210) is deactivated when the first threshold value (S1) is reached and a PWM mode (220) for applying a phase voltage with a phase voltage vector (Us) is activated, wherein the phase voltage vector (Us) and the pole wheel voltage vector (Up) are varied in PWM mode (220) until the parameter influencing the pole wheel voltage reaches a further threshold value (S2), wherein the phase voltage is switched off when the further threshold value (S2) is reached.
    Type: Application
    Filed: November 30, 2016
    Publication date: May 16, 2019
    Applicant: SEG Automotive Germany GmbH
    Inventor: Julian ROESNER
  • Publication number: 20190120884
    Abstract: A method for ascertaining phase currents of an electric machine including a converter and stator including stator windings (phase number of at least three), in which the phase currents of measuring phases (at least two), are measured, the phase currents being measured in a measuring interval when the active switching elements of the measuring phases in a lowside path of the converter are activated in a switching interval delimited by a switching-on point-in-time and switching-off point-in-time, the phase currents of the remaining phases being determined arithmetically from the measured phase currents so that the measured phase currents, a spatial angle of the measuring phases, and a spatial angle of the remaining phases are used for arithmetic determination, in which the measuring interval is selected to be with respect to time outside a switching-on point-in-time or switching-off point-in-time of at least one of the active switching elements of the stator phases.
    Type: Application
    Filed: April 3, 2017
    Publication date: April 25, 2019
    Inventors: Arunkumar M S, Julian ROESNER
  • Publication number: 20190120194
    Abstract: A method for improving a start-up of an internal combustion engine with the aid of a belt-driven starter generator which includes a stator winding and a rotor winding, the starter generator for generating a start-up torque being operated in such a way that the stator winding and the rotor winding are energized essentially at the same time immediately after a start-up request of the starter generator. Also described is a processing unit to perform the method and a computer readable medium.
    Type: Application
    Filed: March 30, 2017
    Publication date: April 25, 2019
    Inventors: Julian Roesner, Martin Henger
  • Patent number: 10094258
    Abstract: A method for controlling an externally excited electric machine to boost regeneration of a NOx storage catalyst which is part of an assembly made up of an internal combustion engine, the externally excited electric machine which is connected to the internal combustion engine in a manner allowing the transmission of torque and which has a rotor including a rotor winding and a stator, and the NOx storage catalyst which is disposed in an exhaust-system branch downstream of the internal combustion engine, the rotor winding of the electric machine being energized with a preexcitation current as a function of an operating state of the NOx storage catalyst.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: October 9, 2018
    Assignees: ROBERT BOSCH GMBH, SEG AUTOMOTIVE GERMANY GMBH
    Inventors: Istvan Deak, Bernd Schroeder, Martin Henger, Tobias Trzebiatowski, Benjamin Klein, Andreas Greis, Mario Kaepple, Julian Roesner
  • Patent number: 10079562
    Abstract: A method for switching on a multi-phase electrical machine in a motor vehicle, the multi-phase electrical machine having a rotor having a rotor winding, and a stator having a multi-phase stator winding; a phase voltage having a phase voltage vector being applied, in a PWM operating mode, to the stator winding, said vector corresponding in terms of absolute magnitude and direction to a pole wheel voltage vector of a pole wheel voltage; the rotor winding being energized by an excitation current; and the PWM operating mode being deactivated, and a block operating mode for application of the phase voltage being activated, when at least one parameter influencing the pole wheel voltage reaches a threshold value.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: September 18, 2018
    Assignees: ROBERT BOSCH GMBH, SEG AUTOMOTIVE GERMANY GMBH
    Inventor: Julian Roesner
  • Patent number: 10014813
    Abstract: A method is provided for switching on and switching off an n-phase electric machine in a motor vehicle. The n-phase electric machine includes a rotor with a rotor winding, and a stator with an n-phase stator winding. An excitation current may be applied to the rotor, and an n-phase phase voltage may be applied to the stator. The excitation current is switched on or off, a parameter which influences a synchronous generated internal voltage is determined, and the phase voltage is switched on or off when the parameter which influences the synchronous generated internal voltage reaches a certain threshold value.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: July 3, 2018
    Assignees: ROBERT BOSCH GMBH, SEG AUTOMOTIVE GERMANY GMBH
    Inventors: Zoltan Ersek, Julian Roesner
  • Publication number: 20180083554
    Abstract: A method for switching on a multi-phase electrical machine in a motor vehicle, the multi-phase electrical machine having a rotor having a rotor winding, and a stator having a multi-phase stator winding; a phase voltage having a phase voltage vector being applied, in a PWM operating mode, to the stator winding, said vector corresponding in terms of absolute magnitude and direction to a pole wheel voltage vector of a pole wheel voltage; the rotor winding being energized by an excitation current; and the PWM operating mode being deactivated, and a block operating mode for application of the phase voltage being activated, when at least one parameter influencing the pole wheel voltage reaches a threshold value.
    Type: Application
    Filed: March 21, 2016
    Publication date: March 22, 2018
    Inventor: Julian Roesner
  • Patent number: 9909853
    Abstract: An electrical machine includes an angular position transducer for identifying a first rotation angle of a rotor; a stator winding for generating a magnetic field; a voltage measuring instrument for sensing a pole wheel voltage at the ends of the stator winding upon a rotation of the rotor; and an identification circuit for identifying a second rotation angle from the pole wheel voltage and for identifying an angle difference between the first and the second rotation angle.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: March 6, 2018
    Assignees: ROBERT BOSCH GMBH, SEG AUTOMOTIVE GERMANY GMBH
    Inventors: Julian Roesner, Mario Kaepple, Paul Mehringer
  • Patent number: 9859823
    Abstract: In a method for ascertaining the phase currents of an electric machine having a power converter and a stator with a phase number of four or more, the phase currents of a measuring number of measuring phases is measured, which is at least two and is lower by at least two than the phase number, and the phase currents of the remaining phases are arithmetically determined from the measured phase currents, at least the measured phase currents, a spatial angle of the measuring phases and a spatial angle of the remaining phases being used for the arithmetical determination.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: January 2, 2018
    Assignee: ROBERT BOSCH GMBH
    Inventor: Julian Roesner
  • Patent number: 9758147
    Abstract: A method is described for shutting off an internal combustion engine in a vehicle that comprises an internal combustion engine and an electrical machine, an electrical torque furnished by the electrical machine being adapted in such a way that a change per unit time in a total torque lies within a definable range, the total torque being made up at least of a torque of the internal combustion engine and the electrical torque.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: September 12, 2017
    Assignee: Robert Bosch GmbH
    Inventors: Julian Roesner, David Vitre
  • Publication number: 20170138993
    Abstract: A method for determining the phase currents of an electric machine having a power converter, and a stator, the power converter having, for each phase, an upper branch having an upper switch and a lower branch having a lower switch, all the upper branches being connected to an upper DC voltage terminal and all the lower branches to a lower DC voltage terminal. The power converter is operated in an active rectification mode in which each upper switch is closed only as long as a phase voltage at the relevant upper switch is higher than a voltage at the upper DC voltage terminal, and each lower switch being closed only as long as a phase voltage at the relevant lower switch is lower than a voltage at the lower DC voltage terminal; phase branch currents being measured in all the lower branches.
    Type: Application
    Filed: June 9, 2015
    Publication date: May 18, 2017
    Inventors: Arunkumar Motaganahalli Srinivasamurthy, Julian Roesner
  • Patent number: 9577563
    Abstract: In a method for activating an electric machine having a rotor, a stator winding having multiple phases and a rectifier having multiple half-bridges corresponding to the number of phases, which each have active switching elements, alternating current signals, which are phase-offset to one another by switching the switching elements, are applied to the phases in a first motor operating mode in which the rotor rotates above a limiting speed, and in a second motor operating mode, in which the rotor rotates below the limiting speed, constant direct-current signals are at least partially applied to the phases by switching the switching elements as a function of an instantaneous angle position of the rotor, the direct-current signals being selected in such a way that a current flow does not exceed a predefined maximum current absolute value through any of the phases.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: February 21, 2017
    Assignee: ROBERT BOSCH GMBH
    Inventor: Julian Roesner
  • Publication number: 20160341087
    Abstract: A method for controlling an externally excited electric machine to boost regeneration of a NOx storage catalyst which is part of an assembly made up of an internal combustion engine, the externally excited electric machine which is connected to the internal combustion engine in a manner allowing the transmission of torque and which has a rotor including a rotor winding and a stator, and the NOx storage catalyst which is disposed in an exhaust-system branch downstream of the internal combustion engine, the rotor winding of the electric machine being energized with a preexcitation current as a function of an operating state of the NOx storage catalyst.
    Type: Application
    Filed: May 13, 2016
    Publication date: November 24, 2016
    Inventors: Istvan Deak, Bernd Schroeder, Martin Henger, Tobias Trzebiatowski, Benjamin Klein, Andreas Greis, Mario Kaepple, Julian Roesner
  • Publication number: 20160181963
    Abstract: A method is provided for switching on and switching off an n-phase electric machine in a motor vehicle. The n-phase electric machine includes a rotor with a rotor winding, and a stator with an n-phase stator winding. An excitation current may be applied to the rotor, and an n-phase phase voltage may be applied to the stator. The excitation current is switched on or off, a parameter which influences a synchronous generated internal voltage is determined, and the phase voltage is switched on or off when the parameter which influences the synchronous generated internal voltage reaches a certain threshold value.
    Type: Application
    Filed: July 24, 2014
    Publication date: June 23, 2016
    Inventors: Zoltan ERSEK, Julian ROESNER
  • Patent number: 9312802
    Abstract: A method is described for controlling a multiphase machine which is connected to a battery, the multiphase machine having a DC link which is provided with a DC link capacitor, phase windings, and a high side switch and a low side switch for each phase. The switches associated with the individual phases are controlled by a control unit in such a way that sinusoidal phase currents are predefined, at least one phase current is connected at any point in time in each control cycle, and a fixed, pulsed control pattern is present for each control cycle. The control widths of the actuating signals associated with the phases are constant in the pulsed control pattern. The control pulses associated with the individual phases are predefined in such a way that the DC link current which arises is minimized.
    Type: Grant
    Filed: July 6, 2012
    Date of Patent: April 12, 2016
    Assignee: ROBERT BOSCH GMBH
    Inventors: Fabio Magini, Paul Mehringer, Julian Roesner
  • Publication number: 20150270797
    Abstract: In a method for ascertaining the phase currents of an electric machine having a power converter and a stator with a phase number of four or more, the phase currents of a measuring number of measuring phases is measured, which is at least two and is lower by at least two than the phase number, and the phase currents of the remaining phases are arithmetically determined from the measured phase currents, at least the measured phase currents, a spatial angle of the measuring phases and a spatial angle of the remaining phases being used for the arithmetical determination.
    Type: Application
    Filed: September 4, 2013
    Publication date: September 24, 2015
    Inventor: Julian Roesner
  • Publication number: 20150137716
    Abstract: In a method for activating an electric machine having a rotor, a stator winding having multiple phases and a rectifier having multiple half-bridges corresponding to the number of phases, which each have active switching elements, alternating current signals, which are phase-offset to one another by switching the switching elements, are applied to the phases in a first motor operating mode in which the rotor rotates above a limiting speed, and in a second motor operating mode, in which the rotor rotates below the limiting speed, constant direct-current signals are at least partially applied to the phases by switching the switching elements as a function of an instantaneous angle position of the rotor, the direct-current signals being selected in such a way that a current flow does not exceed a predefined maximum current absolute value through any of the phases.
    Type: Application
    Filed: November 17, 2014
    Publication date: May 21, 2015
    Inventor: Julian Roesner
  • Patent number: 9000719
    Abstract: The invention relates to an electric machine (10), particularly a generator or a starter generator for a motor vehicle, comprising a converter (64) which is arranged on a cooling element (53) and composed of semiconductor switching elements (58, 59) actuated synchronously with the phase frequency for rectifying a generator alternating voltage or supplying a motor from a DC voltage source (61). According to the invention, the cooling element (53) has a base plate (55) and cooling fins (54), wherein the ratio of the surface wetted by coolant to the volume of the cooling element (53) ranges from 0.5 to 1.5 [l/mm], preferably from 0.8 to 1.0 [l/mm].
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: April 7, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Martin Paetzold, Julian Roesner