Patents by Inventor Toni Itkonen

Toni Itkonen 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).

  • Control of parallel connected power devices
    Patent number: 10707777
    Abstract: A method and arrangement for controlling semiconductor power switches, e.g. IGBTs, in parallel connected power devices, e.g. in frequency converters, wherein the semiconductor power switches connect either the positive or the negative pole of the intermediate DC-voltage of the power device to an output phase of the power device. In the method the voltages of those output phases which are connected in parallel are measured, the timing differences of the output voltage state changes are calculated on the basis of the output voltage measurement results, and the control signals of the semiconductor power switches are advanced or delayed such that the output voltage state changes in the phases which are connected together via output impedances occur at desired time instants.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: July 7, 2020
    Assignee: Vacon Oy
    Inventors: Jussi Pouttu, Ari Ristimäki, Toni Itkonen
  • CONTROL OF PARALLEL CONNECTED POWER DEVICES
    Publication number: 20180269805
    Abstract: A method and arrangement for controlling semiconductor power switches, e.g. IGBTs, in parallel connected power devices, e.g. in frequency converters, wherein the semiconductor power switches connect either the positive or the negative pole of the intermediate DC-voltage of the power device to an output phase of the power device. In the method the voltages of those output phases which are connected in parallel are measured, the timing differences of the output voltage state changes are calculated on the basis of the output voltage measurement results, and the control signals of the semiconductor power switches are advanced or delayed such that the output voltage state changes in the phases which are connected together via output impedances occur at desired time instants.
    Type: Application
    Filed: September 27, 2016
    Publication date: September 20, 2018
    Inventors: Jussi Pouttu, Ari Ristimäki, Toni Itkonen
  • Power level balance of frequency converters connected in parallel
    Patent number: 7872885
    Abstract: A method and a parallel connection arrangement for equalizing the output powers of power converter units (INU11, INU12), in which power converter units is a semiconductor switch bridge controlled with pulse width modulation, and in which is a control unit arrangement (CU1, CU2) for forming control pulses, with which the semiconductor switches are controlled. The control unit arrangement delays the falling edge of the control pulses of at least one semiconductor switch of at least one power converter unit.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: January 18, 2011
    Assignee: Vacon OYJ
    Inventors: Toni Itkonen, Mika Ikonen, Kimmo Rauma, Stefan Strandberg, Jorma Vesti
  • Power level balance of frequency converters connected in parallel
    Publication number: 20080049462
    Abstract: A method and a parallel connection arrangement for equalizing the output powers of power converter units (INU11, INU12), in which power converter units is a semiconductor switch bridge controlled with pulse width modulation, and in which is a control unit arrangement (CU1, CU2) for forming control pulses, with which the semiconductor switches are controlled. The control unit arrangement delays the falling edge of the control pulses of at least one semiconductor switch of at least one power converter unit.
    Type: Application
    Filed: August 20, 2007
    Publication date: February 28, 2008
    Inventors: Toni Itkonen, Mika Ikonen, Kimmo Rauma, Stefan Strandberg, Jorma Vesti