Patents by Inventor Patrik SANDQUIST

Patrik SANDQUIST 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).

  • Black start of a multilevel voltage source converter
    Patent number: 9667133
    Abstract: A voltage source converter includes a black start control unit and cells, where each cell includes a first switch between a first end of a cell capacitor and a first cell terminal, a second switch between a second end of the cell capacitor and the first cell terminal, where a second cell terminal is provided via the first or the second end of the cell capacitor, a first power supply unit and a second power supply unit, where the black start control unit is configured to perform, after the initial application of a DC voltage to a cell terminal of a cell and the subsequent initial charging of the chargeable power supply unit of one of the switches, charging of an uncharged power supply unit of the other switch through repeatedly turning on and off the switch with initially charged power supply unit.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: May 30, 2017
    Assignee: ABB SCHWEIZ AG
    Inventors: Fabienne Chataignere, Lars Döfnäs, Rolf Ottersten, Patrik Sandquist, Roland Siljeström, Erika Siljeström
  • BLACK START OF A MULTILEVEL VOLTAGE SOURCE CONVERTER
    Publication number: 20160028303
    Abstract: A voltage source converter includes a black start control unit and cells, where each cell includes a first switch between a first end of a cell capacitor and a first cell terminal, a second switch between a second end of the cell capacitor and the first cell terminal, where a second cell terminal is provided via the first or the second end of the cell capacitor, a first power supply unit and a second power supply unit, where the black start control unit is configured to perform, after the initial application of a DC voltage to a cell terminal of a cell and the subsequent initial charging of the chargeable power supply unit of one of the switches, charging of an uncharged power supply unit of the other switch through repeatedly turning on and off the switch with initially charged power supply unit.
    Type: Application
    Filed: December 19, 2011
    Publication date: January 28, 2016
    Applicant: ABB TECHNOLOGY LTD
    Inventors: Fabienne CHATAIGNERE, Lars DÖFNÄS, Rolf OTTERSTEN, Patrik SANDQUIST