Patents by Inventor Christopher Fromme

Christopher Fromme 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: 20240047961
    Abstract: A method for protecting an electrical low-voltage circuit includes ascertaining the level of the voltage of the low-voltage circuit in the form of instantaneous voltage values. A change in the current is ascertained over time such that instantaneous current change values are provided. The instantaneous current change values are compared to instantaneous current change threshold values in order to recognize a short circuit in the low-voltage circuit, and if the current change thresholds are exceeded, an electronic interruption unit switches from the low-resistance state to the high-resistance state in order to interrupt the low-voltage current circuit. The process has a trigger time from the short circuit event to the high-resistance state. The trigger time is largely independent of the phase angle. A circuit breaker device for protecting an electrical low-voltage circuit is also provided.
    Type: Application
    Filed: December 16, 2021
    Publication date: February 8, 2024
    Inventors: Fabian Döbler, Christopher Fromme, Dominic Malane, Marvin Tannhäuser
  • Publication number: 20240047960
    Abstract: A circuit breaker device protects an electrical low-voltage current circuit. The level of a current of the low-voltage current circuit is ascertained periodically such that current values are provided incrementally. The level of the voltage of the low-voltage current circuit is ascertained periodically such that voltage values are provided incrementally. The change in the current is ascertained from the periodically ascertained current values over time such that current change values are provided incrementally, and a differential voltage is ascertained from the periodically ascertained voltage values and an expected value of the voltage such that differential voltage values are provided incrementally. Each current change value is compared with a second threshold, and each differential voltage value is compared with a first threshold. If the first and second thresholds are exceeded, an interruption of the current circuit is initiated by switching elements being set to a high-ohmic state.
    Type: Application
    Filed: December 16, 2021
    Publication date: February 8, 2024
    Inventors: Fabian Döbler, Christopher Fromme, Dominic Malane, Marvin Tannhäuser
  • Publication number: 20240047957
    Abstract: A circuit breaker device protects an electric low-voltage current circuit. A level of a voltage of a low-voltage current circuit is ascertained such that ascertained voltage values are provided. A differential voltage is ascertained from the ascertained voltage values and an expected value of the voltage such that differential voltage values are provided incrementally. Each differential voltage value is compared with a first threshold, and if at least two successive differential voltage values exceed the threshold, an interruption of the low-voltage current circuit is initiated by semiconductor-based switching elements, which are set to a high-ohmic state, in order to protect the low-voltage current circuit from a short-circuit.
    Type: Application
    Filed: December 16, 2021
    Publication date: February 8, 2024
    Inventors: Fabian Döbler, Christopher Fromme, Dominic Malane, Marvin Tannhäuser
  • Publication number: 20230308011
    Abstract: Some embodiments of the teachings herein include a DC/DC converter system. The system may include: a full-bridge converter and a switch control circuit. The converter includes a primary side and a secondary side full-bridge circuit and a transformer. AC nodes of the primary side are connected to a primary side of the transformer and AC nodes of the secondary side to a secondary side of the transformer. The switch control circuit: controls the primary side and the secondary side circuits in a normal operating phase including modulation of an input voltage by the primary side full-bridge circuit transferring power via the transformer, control the primary side and the secondary side in a free-wheeling phase during which they are both deactivated to reduce the transformer’s magnetization current; and control the full-bridge circuits to switch between the normal operating phase and the free-wheeling phase alternately.
    Type: Application
    Filed: October 28, 2020
    Publication date: September 28, 2023
    Applicant: Siemens Aktiengesellschaft
    Inventors: Lennart BARUSCHKA, Christopher FROMME
  • Patent number: 11569746
    Abstract: Various embodiments include a DC coupled electrical converter for converting an input voltage applied to first connections to an output voltage comprising: a boost converter connected on the input side to the first connections; an inverting buck-boost converter connected on the input side to the first connections; and a series circuit including two capacitors, the series circuit connected to an output-side positive pole of the boost converter and to an output-side negative pole of the inverting buck-boost converter. An output-side negative pole of the boost converter and an output-side positive pole of the inverting buck-boost converter are connected to a center connection between the capacitors.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: January 31, 2023
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Christopher Fromme, Marvin Tannhäuser
  • Patent number: 11316423
    Abstract: Various embodiments include a half-bridge comprising: a first power semiconductor; a second power semiconductor connected in series with the first power conductor; a controller for the power semiconductors; a line starting at connection node of the power semiconductors; and a meter for measuring the current in the line. The controller is configured to: compare the current with an upper threshold value and a lower threshold value; switch off the first power semiconductor if the upper threshold value is reached; switch on the second power semiconductor after a first dead time has elapsed; and switch off the second power semiconductor if the lower threshold value is reached; and switch on the first power semiconductor after a second dead time has elapsed.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: April 26, 2022
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Christopher Fromme, Marvin Tannhäuser
  • Publication number: 20220123669
    Abstract: Various embodiments of the teachings herein include a solar micro-inverter for converting a DC voltage provided by a solar panel to an AC voltage, the solar micro-inverter including an electrical circuit without a transformer. The solar micro-inverter has an installation height of no more than 24 mm.
    Type: Application
    Filed: November 29, 2018
    Publication date: April 21, 2022
    Applicant: Siemens Aktiengesellschaft
    Inventors: Christopher Fromme, Marvin Tannhäuser
  • Publication number: 20210028690
    Abstract: Various embodiments include a half-bridge comprising: a first power semiconductor; a second power semiconductor connected in series with the first power conductor; a controller for the power semiconductors; a line starting at connection node of the power semiconductors; and a meter for measuring the current in the line. The controller is configured to: compare the current with an upper threshold value and a lower threshold value; switch off the first power semiconductor if the upper threshold value is reached; switch on the second power semiconductor after a first dead time has elapsed; and switch off the second power semiconductor if the lower threshold value is reached; and switch on the first power semiconductor after a second dead time has elapsed.
    Type: Application
    Filed: February 27, 2018
    Publication date: January 28, 2021
    Applicant: Siemens Aktiengesellschaft
    Inventors: Christopher FROMME, Marvin TANNHÄUSER
  • Publication number: 20200169171
    Abstract: Various embodiments include a DC coupled electrical converter for converting an input voltage applied to first connections to an output voltage comprising: a boost converter connected on the input side to the first connections; an inverting buck-boost converter connected on the input side to the first connections; and a series circuit including two capacitors, the series circuit connected to an output-side positive pole of the boost converter and to an output-side negative pole of the inverting buck-boost converter. An output-side negative pole of the boost converter and an output-side positive pole of the inverting buck-boost converter are connected to a center connection between the capacitors.
    Type: Application
    Filed: June 26, 2018
    Publication date: May 28, 2020
    Applicant: Siemens Aktiengesellschaft
    Inventors: Christopher Fromme, Marvin Tannhäuser
  • Patent number: 10566909
    Abstract: A DC-DC converter and a method for operating the same are disclosed. The DC-DC converter includes an inverter, a transformer, a rectifier, a clamping assembly, and a control unit. The inverter has four interconnected primary semiconductor switches which form an inverter full bridge for converting an input DC voltage into an AC voltage. The transformer has a primary winding which is arranged in the bridge branch of the inverter full bridge. The rectifier is connected to the secondary winding of the transformer and is designed to rectify a secondary voltage of the transformer. The clamping assembly has an additional semiconductor switch and a clamping capacitor which is connected to the additional semiconductor switch in series. The rectified secondary voltage of the transformer is applied to the clamping assembly. The control unit is designed to control the primary semiconductor switches and the additional semiconductor switch.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: February 18, 2020
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Michael Denzner, Christopher Fromme
  • Publication number: 20190319542
    Abstract: A DC-DC converter and a method for operating the same are disclosed. The DC-DC converter includes an inverter, a transformer, a rectifier, a clamping assembly, and a control unit. The inverter has four interconnected primary semiconductor switches which form an inverter full bridge for converting an input DC voltage into an AC voltage. The transformer has a primary winding which is arranged in the bridge branch of the inverter full bridge. The rectifier is connected to the secondary winding of the transformer and is designed to rectify a secondary voltage of the transformer. The clamping assembly has an additional semiconductor switch and a clamping capacitor which is connected to the additional semiconductor switch in series. The rectified secondary voltage of the transformer is applied to the clamping assembly. The control unit is designed to control the primary semiconductor switches and the additional semiconductor switch.
    Type: Application
    Filed: November 6, 2017
    Publication date: October 17, 2019
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: MICHAEL DENZNER, CHRISTOPHER FROMME
  • Patent number: 7099746
    Abstract: A mobile device for traversing a ferromagnetic surface. The device includes a frame and at least one surface contacting device attached to the frame. The device also includes a Halbach magnet array attached to the frame, wherein the Halbach magnet array provides a magnetic force to maintain the surface contacting device substantially into contact with the ferromagnetic surface.
    Type: Grant
    Filed: August 5, 2004
    Date of Patent: August 29, 2006
    Assignee: Carnegie Mellon University
    Inventors: William P. Ross, James F. Hoburg, Christopher Fromme, John Bares, Mark DeLouis
  • Publication number: 20050005812
    Abstract: A mobile device for traversing a ferromagnetic surface. The device includes a frame and at least one surface contacting device attached to the frame. The device also includes a Halbach magnet array attached to the frame, wherein the Halbach magnet array provides a magnetic force to maintain the surface contacting device substantially into contact with the ferromagnetic surface.
    Type: Application
    Filed: August 5, 2004
    Publication date: January 13, 2005
    Inventors: William Ross, James Hoburg, Christopher Fromme, John Bares, Mark DeLouis
  • Patent number: 6792335
    Abstract: A mobile device for traversing a ferromagnetic surface. The device includes a frame and at least one surface contacting device attached to the frame. The device also includes a Halbach magnet array attached to the frame, wherein the Halbach magnet array provides a magnetic force to maintain the surface contacting device substantially into contact with the ferromagnetic surface.
    Type: Grant
    Filed: May 23, 2002
    Date of Patent: September 14, 2004
    Assignee: Carnegie Mellon University
    Inventors: William P. Ross, James F. Hoburg, Christopher Fromme, John Bares, Mark DeLouis
  • Publication number: 20020188380
    Abstract: A mobile device for traversing a ferromagnetic surface. The device includes a frame and at least one surface contacting device attached to the frame. The device also includes a Halbach magnet array attached to the frame, wherein the Halbach magnet array provides a magnetic force to maintain the surface contacting device substantially into contact with the ferromagnetic surface.
    Type: Application
    Filed: May 23, 2002
    Publication date: December 12, 2002
    Inventors: William P. Ross, James F. Hoburg, Christopher Fromme, John Bares, Mark DeLouis