Patents by Inventor Petteri Ämmälä

Petteri Ämmälä 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 and apparatus to control a ship
    Patent number: 7442100
    Abstract: The invention relates to a method and an apparatus to control a propulsion drive. The propulsion drive comprises at least one first propeller drive, which rotates the first propeller and by which the propulsion power and/or rotating speed of the first propeller, and a second propeller drive, by which the second propeller is rotated and controlled. According to the invention the propulsion drive is controlled by a single control command, whereby it is generated from the control command a first control signal, by which the first propeller drive is controlled, and a second signal, by which the second propeller drive is controlled.
    Type: Grant
    Filed: April 13, 2004
    Date of Patent: October 28, 2008
    Assignee: ABB Oy
    Inventors: Vesa Korhonen, Risto Pakaste, Antti Ruohonen, Petri Sullström, Panu Virolainen, Petteri Ämmälä, Matti Lehti
  • Method for operating a rotating electrical machine and apparatus for carrying out the method
    Patent number: 7330010
    Abstract: A method is specified for operating a rotating electrical machine (1), which machine (1) has at least two sets of stator windings (A, B), in each case one associated converter unit (2) being provided for each set of stator windings (A, B) and each set of stator windings (A, B) comprising n phase windings, where n?3, in which method the respective set of stator windings (A, B) is fed by the associated converter unit (2).
    Type: Grant
    Filed: February 9, 2006
    Date of Patent: February 12, 2008
    Assignee: ABB Schweiz AG
    Inventors: Petri Schroderus, Petteri Ämmälä, Halina Burzanowska