Patent ID: 7768173

Claim:
A stator assembly for an electrical machine, said stator assembly comprising: a pressure vessel; a yoke in thermal communication with said pressure vessel to facilitate heat removal from said stator assembly; a plurality of teeth comprising a plurality of laminations, said plurality of laminations comprising at least one of a first lamination having a first thermal conductivity and a first magnetic permeability and at least one of a second lamination having a second thermal conductivity and a second magnetic permeability, wherein the first thermal conductivity is different than the second thermal conductivity and the first magnetic permeability is different than the second magnetic permeability, said second lamination comprises a first portion that extends radially within said plurality of teeth with a first predetermined axial thickness and a second portion that extends radially within said yoke with a second predetermined axial thickness, said second portion is in thermal communication with said pressure vessel to facilitate heat removal from said stator assembly.