Patents by Inventor Ivan Pejcic

Ivan Pejcic 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).

  • Model predictive damping of oscillations in an electrical converter system
    Patent number: 10404155
    Abstract: A method for controlling an electrical converter system, including: determining a reference output (?m*) and an estimated output (?m) of the electrical converter system based on measurements in the electrical converter system; determining an optimized pulse pattern (ui,n) by selecting from a table of precalculated optimized pulse patterns, which is chosen based on the reference output (?m*) and the estimated output (?m), a pulse pattern including a sequence of switching instants (t*) applied to the electrical converter system; determining a resonant oscillation (?s,h) in the electrical converter system, the resonant oscillation(?s,h) is composed of an electrical machine and a LC filter of the electrical converter system; determining a sequence of future states of the electrical converter system by solving a mathematical model of the electrical converter system subject to optimizing a cost function and subject to a constraint that a modified pulse pattern (ui) is applied to the electrical converter system, whi
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: September 3, 2019
    Assignee: ABB Schweiz AG
    Inventors: Peter Al-Hokayem, Ivan Pejcic
  • MODEL PREDICTIVE DAMPING OF OSCILLATIONS IN AN ELECTRICAL CONVERTER SYSTEM
    Publication number: 20180054112
    Abstract: A method for controlling an electrical controller system (10), the method comprising, determining a reference output (?*m) and an estimated output (?m) of the electrical converter system (10) based on measurements in the electrical converter system (10); determining an optimized pulse pattern (uin by selecting from a table of precalculated optimized pulse patterns, which is chosen based on the reference output (?*m) and the estimated output (?m), a pulse pattern comprising a sequence of switching instants (ƒ) applied to the electrical converter system (10); determining a resonant oscillation (?0,h) in the electrical converter system (10), whereby the resonant oscillation (?0*) is composed of an electrical machine (16) and a LC fiber (14) of the electrical converter system (10); determining a sequence of future states of the electrical converter system (10) by solving a mathematical model of the electrical converter system (10) subject to optimizing a cost function and subject to a constraint that a modified p
    Type: Application
    Filed: August 25, 2017
    Publication date: February 22, 2018
    Inventors: Peter Al-Hokayem, Ivan Pejcic