Patents by Inventor Kari Turunen

Kari Turunen 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).

  • Method in frequency converter provided with voltage intermediate circuit, and frequency converter
    Patent number: 7215099
    Abstract: A method in a frequency converter provided with a voltage intermediate circuit in connection with interference in a network (5) to be supplied and a frequency converter (2), which comprises a network converter part (4) and an inverter part (3) and a DC intermediate circuit (7) between them. The method comprises steps of controlling the intermediate circuit voltage at the beginning of network interference by limiting the torque on the inverter side, detecting interference in the network voltage, setting a torque reference to a predetermined value in response to the network interference, detecting network voltage recovery, and controlling the torque reference to a normal value in response to the network voltage recovery.
    Type: Grant
    Filed: August 2, 2005
    Date of Patent: May 8, 2007
    Assignee: ABB Oy
    Inventors: Jukka Ylppö, Kari Turunen
  • Method in frequency converter provided with voltage intermediate circuit, and frequency converter
    Publication number: 20060034357
    Abstract: A method in a frequency converter provided with a voltage intermediate circuit in connection with interference in a network (5) to be supplied and a frequency converter (2), which comprises a network converter part (4) and an inverter part (3) and a DC intermediate circuit (7) between them. The method comprises steps of controlling the intermediate circuit voltage at the beginning of network interference by limiting the torque on the inverter side, detecting interference in the network voltage, setting a torque reference to a predetermined value in response to the network interference, detecting network voltage recovery, and controlling the torque reference to a normal value in response to the network voltage recovery.
    Type: Application
    Filed: August 2, 2005
    Publication date: February 16, 2006
    Applicant: ABB OY
    Inventors: Jukka Ylppo, Kari Turunen