Patent ID: 7448929
Filing Date: 2008-11-11
Classification: B63H,H02K,Y02T

Abstract:
1. A ship propulsion system, comprising: a synchronous machine having a rotor with a multi-pole rotor winding; a rotor cooling system thermally coupled, to the rotor winding for cooling the rotor winding to a low temperature; a stator surrounding the rotor and including a stator winding; a stator cooling system for cooling the stator to a temperature where the stator winding is normally conducting, said stator cooling system removing heat generated by the stator winding to water as a cooling medium; a support structure which at least partially supports the stator winding, the support structure having a substantially hollow cylindrical outer body made of a soft-magnetic material and axially and radially extending fin-shaped support teeth disposed inside the hollow cylindrical outer body, with at least sections of the stator winding being arranged between the support teeth; and an outside housing with a hollow cylindrical housing section surrounding directly the outer body of the support structure, wherein at least partial regions of the housing section are cooled by direct thermal exchange with the cooling medium in or at the housing section, and the stator winding is thermally coupled to the cooling medium via the support structure and the housing section.