Abstract: A ship propulsion system includes a ship electrical system and an electric propulsion system that is supplied with power from the electrical system, and which is equipped with a cascade control for the propeller motor. The rotational speed of the propeller motor is preset by a higher-order controller whose command variable is issued by the throttle lever. Filters means are provided for suppressing impairments to the ship's operation that result due to the high dynamics of the propulsion system.

Abstract: A propelling and driving system for boats having an outboard rudder propeller. The system provides the boat with reliable and comparatively good maneuverability. The system comprises at least two rudder propellers, each having driving motors configured in the form of a permanent magnet-excited synchronous machine. The stator winding of each synchronous machine has three winding phases connected to a three-phase alternating current, which are connected to the supply system of the boat. A modular controlling and regulating device comprising standardized modules is provided for each of the rudder propellers.