Abb Schweiz Ag

Abb Oy

Petteri Ämmälä

Panu Virolainen

Petri Schroderus

Halina Burzanowska

Risto Pakaste

Antti Ruohonen

Petri Sullström

Vesa Korhonen

Matti Lehti

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.

Method and apparatus to control a ship

A method is specified for operating a rotating electrical machine (), which machine () has at least two sets of stator windings (A, B), in each case one associated converter unit () being provided for each set of stator windings (A, B) and each set of stator windings (A, B) comprising n phase windings, where n&#x2267;3, in which method the respective set of stator windings (A, B) is fed by the associated converter unit (). In order to make it possible to regulate or influence electrical variables of the individual sets of stator windings of the rotating electrical machine in redundant fashion and independently, the currents (i, i, i; i, i, i) of at least n&#x2212;1 phase windings of each set of stator windings (A, B) are measured, and in each case one associated regulating device () is provided for each converter unit () and each converter unit () is driven by means of a drive signal (S) of the associated regulating device () independently of regulating devices () of the respective other converter units (). In addition, the drive signal (S) is formed in the respective regulating device () from the measured currents (i, i, i; i, i, i) of each set of stator windings (A, B). Furthermore, an apparatus is specified for carrying out the method.

Method for operating a rotating electrical machine and apparatus for carrying out the method

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Baden-Dättwil, Switzerland

Petteri Ämmälä