Patents by Inventor Frode Kleveland

Frode Kleveland 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).

  • High output power high frequency resonant load inverters
    Patent number: 6842355
    Abstract: A new control strategy for IGBTs when used in high frequency (75 kHz-500 kHz) high power (10 kW-5 MW) inverters with series resonant load, a topology commonly used for induction heating. The strategy changes the IGBT strain elements into a total stress picture that fits the IGBP's behaviour and internal nature better. This makes the IGBT operate much more efficient, thus increasing the maximum output power from the inverter significantly compared to a standard control scheme. This makes the IGBT based inverter a much cheaper alternative than a MOSFET inverter, which has been state of the art for this application.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: January 11, 2005
    Assignee: EFD Induction a.s.
    Inventor: Frode Kleveland
  • High output power high frequency resonant load inverters
    Publication number: 20030179595
    Abstract: A new control strategy for IGBIs when used in high frequency (75 kHz-500 kHz) high power (10 kW-5 MW) inverters with series resonant load, a topology commonly used for induction heating. The strategy changes the IGBT strain elements into a total stress picture that fits the IGBT's behaviour and internal nature better. This makes the IGBT operate much more efficient, thus increasing the maximum output power from the inverter significantly compared to a standard control scheme. This makes the IGBT based inverter a much cheaper alternative than a MOSFET inverter, which has been state of the art for this application.
    Type: Application
    Filed: March 25, 2003
    Publication date: September 25, 2003
    Inventor: Frode Kleveland