Patents by Inventor Matthias Luescher

Matthias Luescher 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: 9025351
    Abstract: An exemplary converter circuit has a converter unit with plural actuatable power semiconductor switches, and the DC voltage side of which is connected to a capacitive energy storage circuit. The capacitive energy storage circuit has at least one capacitive energy store and at least one snubber network for limiting the rate of current or voltage rise on the actuatable power semiconductor switches of the converter unit. In order to reduce undesirable oscillations in an overcurrent in the capacitive energy storage circuit, the capacitive energy storage circuit has at least one passive nonactuatable damping unit having a unidirectional current-flow direction, where the passive nonactuatable damping unit has a diode and a damping resistor.
    Type: Grant
    Filed: April 5, 2013
    Date of Patent: May 5, 2015
    Assignee: ABB Technology AG
    Inventors: Kefas Damazio-Coelho, Matthias Luescher, Oscar Apeldoorn, Thomas Berner