Patents by Inventor Dirk Hertz

Dirk Hertz 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: 20190190407
    Abstract: The invention relates to a soft starter (10) for connecting at least one main circuit (12, 14, 16), each of which includes a bypass circuit (20) having a semiconductor switch (22). Said soft starter (10) comprises a control unit (40) for actuating the bypass circuit (20), and the control unit (40) is equipped with a control signal input (44). According to the invention, the control unit (40) has a separate safety signal input (42).
    Type: Application
    Filed: August 3, 2017
    Publication date: June 20, 2019
    Inventors: Kyoung-Jin Lee-Hoff, Johann Seitz, Klaus Aufschneider, Dirk Hertz, Markus Meier, Stefan Zitzler
  • Publication number: 20190162758
    Abstract: The disclosure relates to a current-measuring apparatus having an assembly with two or more burdens in series connection and a current transformer module with a secondary coil. Herein, the series connection includes three or more contacts so that the connection combinations of the secondary coil to in each case two of the three or more contacts enables different groups of one or more burdens to be switched with the secondary coil to form an electric circuit. A secondary current induced by a primary current to be measured in the secondary coil is able to flow through the electric circuit formed in this way.
    Type: Application
    Filed: November 20, 2018
    Publication date: May 30, 2019
    Inventors: Dirk Hertz, Florian Ringer
  • Publication number: 20190165707
    Abstract: Methods for controlling a voltage present at an electric fan during a startup of the fan are disclosed herein. The fan serves to generate a flow of air for cooling a device. The method includes applying an output voltage of a power supply, which serves to supply voltage to the device, to the fan; and switching on and switching off the output voltage of the power supply applied to the fan by a switch pulse-width-modulated-controlled by a control unit so that the Root Mean Square value of the current flowing through the fan is less than a startup current of the fan.
    Type: Application
    Filed: November 19, 2018
    Publication date: May 30, 2019
    Inventors: Dirk Hertz, Florian Ringer, Marco Schönenberg
  • Patent number: 10253742
    Abstract: A motor starter includes a control unit and a first current path, via which energy can be supplied to a downstream electrical motor. The first current path includes a semiconductor switch and an electromechanical switch element, the semiconductor switch and the switch element being connected in series. In order to provide a cost-effective, safe motor starter, according to an embodiment of the invention the control unit is designed such that, in order to produce an energy supply via the first current path in a first step, it ensures that the voltage currently connected via the switch element, in respect of a previous opening of the switch element, lies below the allowable maximum blocking voltage of the semiconductor switch. Subsequently in a second step, the switch element first closes and then switches the semiconductor switch to be conductive.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: April 9, 2019
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Dirk Hertz, Stephan Jonas, Johann Seitz
  • Patent number: 9851404
    Abstract: An embodiment relates to a switchgear for a single-phase motor and a three-phase motor, the switchgear including a processing unit and a first, second and third current path, the first and third current path each including a current transformer. The processing unit is adapted to detect the current I1 of the first current path and the current I3 of the third current path. To provide a cost-effective switchgear for a one-phase motor and a three-phase motor which is adapted to identify the failure of every single phase in the three-phase operation and a phase failure in the one-phase operation, the processing unit is designed such as to detect the currents I1, I3 of the first and third current path and to determine, based on the phase shift between the detected currents I1, I3 of the first and third current path in which operating mode the switchgear is operated.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: December 26, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Dirk Hertz, Marco Schönenberg, Helene Steuer, Stefan Zitzler
  • Patent number: 9698592
    Abstract: A device for connecting to a power network includes a circuit board, a first input-side connection point, to which a first phase of the power network can be connected, a second input-side connection point, to which a second phase of the power network can be connected, and a first and second electrical conductor. The first conductor is connected to the first input-side connection point and the second conductor is connected to the second input-side connection point inside the device. The first conductor is routed as a conductor trace in an interior layer of the circuit board and includes a constriction. The second conductor is routed past the constriction such that electrical insulation existing between the constriction of the first conductor and the second conductor is destroyed in the case of a short-circuit current, to provide an electrically conductive connection between the first and second conductor exists.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: July 4, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Dirk Hertz, Stephan Jonas, Norbert Reichenbach, Johann Seitz
  • Patent number: 9502881
    Abstract: An embodiment of the invention relates to a switchgear which includes a control unit, a supply connection and a first current path. The first current path includes a first electromechanical switch and, connected in series to the first switch, a parallel connection of a second electromechanical switch to a semiconductor switch. The switchgear includes an energy accumulator and a measuring device. A control unit is capable of monitoring energy supply coming in through the supply connection. If the energy supply through the supply connection reaches a critical range, the control unit controls the output of the switching signals via the energy of the energy accumulator such that: in a first step, the semiconductor switch is switched to be electrically conducting and the second switch is then opened, and in a second step, the semiconductor switch is switched to be electrically non-conducting and the second switch is then opened.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: November 22, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Dirk Hertz, Marco Schönenberg, Johann Seitz, Stefan Zitzler
  • Publication number: 20150372483
    Abstract: A device for connecting to a power network includes a circuit board, a first input-side connection point, to which a first phase of the power network can be connected, a second input-side connection point, to which a second phase of the power network can be connected, and a first and second electrical conductor. The first conductor is connected to the first input-side connection point and the second conductor is connected to the second input-side connection point inside the device. The first conductor is routed as a conductor trace in an interior layer of the circuit board and includes a constriction. The second conductor is routed past the constriction such that electrical insulation existing between the constriction of the first conductor and the second conductor is destroyed in the case of a short-circuit current, to provide an electrically conductive connection between the first and second conductor exists.
    Type: Application
    Filed: August 10, 2012
    Publication date: December 24, 2015
    Applicant: Siemens Aktiengesellschaft
    Inventors: Dirk HERTZ, Stephan JONAS, Norbert REICHENBACH, Johann SEITZ
  • Publication number: 20150303676
    Abstract: An embodiment of the invention relates to a switchgear which includes a control unit, a supply connection and a first current path. The first current path includes a first electromechanical switch and, connected in series to the first switch, a parallel connection of a second electromechanical switch to a semiconductor switch. The switchgear includes an energy accumulator and a measuring device. A control unit is capable of monitoring energy supply coming in through the supply connection. If the energy supply through the supply connection reaches a critical range, the control unit controls the output of the switching signals via the energy of the energy accumulator such that: in a first step, the semiconductor switch is switched to be electrically conducting and the second switch is then opened, and in a second step, the semiconductor switch is switched to be electrically non-conducting and the second switch is then opened.
    Type: Application
    Filed: August 30, 2012
    Publication date: October 22, 2015
    Applicant: Siemens Aktiengesellschaft
    Inventors: Dirk HERTZ, Marco SCHÖNENBERG, Johann SEITZ, Stefan ZITZLER
  • Publication number: 20150300305
    Abstract: A motor starter includes a control unit and a first current path, via which energy can be supplied to a downstream electrical motor. The first current path includes a semiconductor switch and an electromechanical switch element, the semiconductor switch and the switch element being connected in series. In order to provide a cost-effective, safe motor starter, according to an embodiment of the invention the control unit is designed such that, in order to produce an energy supply via the first current path in a first step, it ensures that the voltage currently connected via the switch element, in respect of a previous opening of the switch element, lies below the allowable maximum blocking voltage of the semiconductor switch. Subsequently in a second step, the switch element first closes and then switches the semiconductor switch to be conductive.
    Type: Application
    Filed: August 6, 2013
    Publication date: October 22, 2015
    Inventors: Dirk HERTZ, Stephan JONAS, Johann SEITZ
  • Publication number: 20150241514
    Abstract: An embodiment relates to a switchgear for a single-phase motor and a three-phase motor, the switchgear including a processing unit and a first, second and third current path, the first and third current path each including a current transformer, The processing unit is adapted to detect the current I1. of the first current path and the current I3 of the third current path. To provide a cost-effective switchgear for a one-phase motor and a three-phase motor which is adapted to identify the failure of every single phase in the three-phase operation and a phase failure in the one-phase operation, the processing unit is designed such as to detect the currents I1, I3 of the first and third current path and to determine, based on the phase shift between the detected currents I1, I3 of the first and third current path in which operating mode the switchgear is operated.
    Type: Application
    Filed: August 20, 2013
    Publication date: August 27, 2015
    Inventors: Dirk Hertz, Marco Schönenberg, Helene Steuer, Stefan Zitzler
  • Patent number: 8736205
    Abstract: A switching device and method are disclosed for terminating a braking process of a three-phase AC motor. The braking process of the AC motor is performed by way of a first and second thyristor. During the braking process of the AC motor, in a first step the first thyristor is actuated in such a way that a braking current is fed to the AC motor, and therefore a torque which brakes the AC motor is produced. In a second step the second thyristor is actuated in such a way that, when the first thyristor is quenched, the braking current is taken on by the second thyristor and the braking torque is maintained. The two steps are repeated during the braking process; wherein the second step is suppressed during the braking process after a last actuation of the first thyristor.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: May 27, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Dirk Hertz, Johann Seitz, Stefan Zitzler
  • Patent number: 8698439
    Abstract: A method is disclosed for determining a phase failure in an electrical device for driving or monitoring a three-phase AC motor, wherein the electrical device comprises a first, a second and a third line. In order to detect a phase failure in a line in the three-phase electrical device, in particular in a soft starter, the phase failure in the third line is determined by analysing the first and second lines, wherein the analysis includes: determining a value which characterizes a phase shift between a current in the first and second lines, and outputting a signal if the value which has been determined is in a range of values which characterizes a phase failure in the third line.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: April 15, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Dirk Hertz, Marco Schönenberg, Johann Seitz, Stefan Zitzler
  • Publication number: 20130241450
    Abstract: A switching device and method are disclosed for terminating a braking process of a three-phase AC motor. The braking process of the AC motor is performed by way of a first and second thyristor. During the braking process of the AC motor, in a first step the first thyristor is actuated in such a way that a braking current is fed to the AC motor, and therefore a torque which brakes the AC motor is produced. In a second step the second thyristor is actuated in such a way that, when the first thyristor is quenched, the braking current is taken on by the second thyristor and the braking torque is maintained. The two steps are repeated during the braking process; wherein the second step is suppressed during the braking process after a last actuation of the first thyristor.
    Type: Application
    Filed: November 17, 2010
    Publication date: September 19, 2013
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Dirk Hertz, Johann Seitz, Stefan Zitzler
  • Publication number: 20130221892
    Abstract: A method is disclosed for determining a phase failure in an electrical device for driving or monitoring a three-phase AC motor, wherein the electrical device comprises a first, a second and a third line. In order to detect a phase failure in a line in the three-phase electrical device, in particular in a soft starter, the phase failure in the third line is determined by analysing the first and second lines, wherein the analysis includes: determining a value which characterizes a phase shift between a current in the first and second lines, and outputting a signal if the value which has been determined is in a range of values which characterizes a phase failure in the third line.
    Type: Application
    Filed: November 17, 2010
    Publication date: August 29, 2013
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Dirk Hertz, Marco Schönenberg, Johann Seitz, Stefan Zitzler
  • Patent number: 8466640
    Abstract: A method is disclosed for slowing-down control of an asynchronous machine, wherein the value of a start energy is determined and stored while the asynchronous machine is being run up from being stationary to the operating rotation speed. The asynchronous machine is braked, in the reversing mode, with braking energy which corresponds to the start energy multiplied by a correction factor wherein the correction factor assumes a value between 0 and 1. In at least one embodiment, the asynchronous machine is braked further by DC braking after braking has been carried out in the reversing mode.
    Type: Grant
    Filed: August 12, 2008
    Date of Patent: June 18, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Dirk Hertz, Diethard Runggaldier, Stefan Zitzler
  • Publication number: 20100207554
    Abstract: A method is disclosed for slowing-down control of an asynchronous machine, wherein the value of a start energy is determined and stored while the asynchronous machine is being run up from being stationary to the operating rotation speed. The asynchronous machine is braked, in the reversing mode, with braking energy which corresponds to the start energy multiplied by a correction factor wherein the correction factor assumes a value between 0 and 1. In at least one embodiment, the asynchronous machine is braked further by DC braking after braking has been carried out in the reversing mode.
    Type: Application
    Filed: August 12, 2008
    Publication date: August 19, 2010
    Inventors: Dirk Hertz, Diethard Runggaldier, Stefan Zitzler
  • Patent number: D558684
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: January 1, 2008
    Assignee: Siemens Aktiengesellschaff
    Inventors: Marco Dornauer, Dirk Hertz, Peter Kaluza, Alexander Müller, Diethard Runggaldier
  • Patent number: D560608
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: January 29, 2008
    Assignee: Siemens Aktiengesellschaft
    Inventors: Marco Dornauer, Dirk Hertz, Peter Kaluza
  • Patent number: D567178
    Type: Grant
    Filed: July 2, 2007
    Date of Patent: April 22, 2008
    Assignee: Siemens Aktiengesellschaft
    Inventors: Marco Dornauer, Dirk Hertz, Peter Kaluza, Norbert Reichenbach