Patents by Inventor Pertti Silventoinen

Pertti Silventoinen 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).

  • Frequency converter and its control method
    Patent number: 7035123
    Abstract: Method of controlling a voltage controlled PWM (Pulse Width Modulated) frequency converter comprising a single phase rectifier bridge (10) connectable to a sinusoidal single phase supply, a DC intermediate circuit (11) and a controlled inverter bridge (12) for generating an AC output voltage with varying amplitude and frequency to a load, said inverter bridge (12) having PWM controlled semiconductor switches (V11–V16) and flywheel diodes (D11–D16) connected in inverse-parallel with the semiconductor switches, wherein the DC intermediate circuit (11) is provided with a DC capacitor unit, and wherein the frequency converter is controlled so that the supply line current (Iin) is essentially sinusoidal and in phase with the supply line voltage (Uin).
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: April 25, 2006
    Assignees: Vacon Oyj, Semikron Elektronik GmbH
    Inventors: Dejan Schreiber, Olli Pyrhönen, Pertti Silventoinen, Risto Komulainen
  • Frequency converter and its control method
    Publication number: 20050007799
    Abstract: Method of controlling a voltage controlled PWM (Pulse Width Modulated) frequency converter comprising a single phase rectifier bridge (10) connectable to a sinusoidal single phase supply, a DC intermediate circuit (11) and a controlled inverter bridge (12) for generating an AC output voltage with varying amplitude and frequency to a load, said inverter bridge (12) having PWM controlled semiconductor switches (V11-V16) and flywheel diodes (D11-D16) connected in inverse-parallel with the semiconductor switches, wherein the DC intermediate circuit (11) is provided with a DC capacitor unit, and wherein the frequency converter is controlled so that the supply line current (Iin) is essentially sinusoidal and in phase with the supply line voltage (Uin).
    Type: Application
    Filed: January 30, 2004
    Publication date: January 13, 2005
    Inventors: Dejan Schreiber, Olli Pyrhonen, Pertti Silventoinen, Risto Komulainen