Patents by Inventor Frank Brenk

Frank Brenk 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).

  • Method and device for insulation monitoring of non-grounded electrical DC and AC grids
    Patent number: 8994379
    Abstract: Exemplary methods are directed to insulation monitoring of non-grounded electrical DC power supply systems and AC power supply systems which have a resistive (Rf) and capacitive (Cf) insulation impedance between the power supply system and ground. The method includes applying a pulsed AC voltage (U0) having alternately different pulsed voltage values to the power supply system to be monitored via a resistive system interface (Ri) between the power supply system and ground. The insulation impedance (Rf) between the power supply system and ground is determined using time profiles of transient processes of the measurement voltage (Vm) prior to transient recovery of the power supply system to the respective pulsed voltage value (U0) of two polarity-inverted pulsed voltage value application processes.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: March 31, 2015
    Assignee: ABB AG
    Inventors: Frank Brenk, Franz-Otto Witte, Wolfram Strepp
  • METHOD AND DEVICE FOR INSULATION MONITORING OF NON-GROUNDED ELECTRICAL DC AND AC GRIDS
    Publication number: 20120119754
    Abstract: Exemplary methods are directed to insulation monitoring of non-grounded electrical DC power supply systems and AC power supply systems which have a resistive (Rf) and capacitive (Cf) insulation impedance between the power supply system and ground. The method includes applying a pulsed AC voltage (U0) having alternately different pulsed voltage values to the power supply system to be monitored via a resistive system interface (Ri) between the power supply system and ground. The insulation impedance (Rf) between the power supply system and ground is determined using time profiles of transient processes of the measurement voltage (Vm) prior to transient recovery of the power supply system to the respective pulsed voltage value (U0) of two polarity-inverted pulsed voltage value application processes.
    Type: Application
    Filed: November 15, 2011
    Publication date: May 17, 2012
    Applicant: ABB AG
    Inventors: Frank Brenk, Franz-Otto Witte, Wolfram Strepp
  • Electrical switch
    Patent number: D844569
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: April 2, 2019
    Inventor: Frank Brenk
  • Electrical device
    Patent number: D885349
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: May 26, 2020
    Assignee: ABB SCHWEIZ AG
    Inventor: Frank Brenk
  • Electrical device
    Patent number: D894133
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: August 25, 2020
    Assignee: ABB SCHWEIZ AG
    Inventor: Frank Brenk