Patent ID: 8952582
Filing Date: 2015-02-10
Classification: H02K,Y02E

Abstract:
1. An electrical machine comprising: a stator arrangement comprising: a stator having a stator stack comprising a plurality of axially adjacently disposed metal plates, and a cooling device in the shape of at least one heat pipe, wherein the at least one heat pipe is shaped to be inserted between a pair of adjacently disposed metal plates of the stator stack, wherein the stator stack is configured as a heat source and a cooling medium surrounding the stator stack and circulating through a housing of the electrical machine is configured as a heat sink of the heat pipe, wherein the heat pipe is provided with at least one cooling fin, the at least one fin providing an enlarged area at the respective portion of the heat pipe allocated to the heat sink, wherein the at least one heat pipe comprises at least two portions of different thermal conductive properties, and wherein the electrical machine is a generator for a direct drive wind turbine.