Patents by Inventor Joern Poulsen

Joern Poulsen 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).

  • Motor controller incorporating an electronic circuit for protection against inrush currents
    Patent number: 7050278
    Abstract: Inrush currents in the dc intermediate circuit of a motor controller necessitate the incorporation of protection circuits. These circuits usually take the form of a resistor inserted in series with the intermediate circuit, and the resistor is short-circuited after completion of inrush by a switch positioned in parallel with the resistor. To reduce cable-transmitted electrical noise an earthed noise-decoupling capacitor is added to the intermediate circuit, but it also requires protection against inrush currents. To minimise the number of components, a protection circuit is described which combines noise filtration and inrush protection.
    Type: Grant
    Filed: May 21, 2003
    Date of Patent: May 23, 2006
    Assignee: Danfoss Drives A/S
    Inventor: Joern Poulsen
  • Motor controller incorporating an electronic circuit for protection against inrush currents
    Publication number: 20030218838
    Abstract: Inrush currents in the dc intermediate circuit of a motor controller necessitate the incorporation of protection circuits. These circuits usually take the form of a resistor inserted in series with the intermediate circuit, and the resistor is short-circuited after completion of inrush by a switch positioned in parallel with the resistor. To reduce cable-transmitted electrical noise an earthed noise-decoupling capacitor is added to the intermediate circuit, but it also requires protection against inrush currents. To minimise the number of components, a protection circuit is described which combines noise filtration and inrush protection.
    Type: Application
    Filed: May 21, 2003
    Publication date: November 27, 2003
    Applicant: Danfoss Drives A/S
    Inventor: Joern Poulsen