Patent ID: 8866351
Filing Date: 2014-10-21
Classification: H02K,Y02E

Abstract:
1. A cooling arrangement for an electric machine wherein the electric machine comprises a stator, wherein the stator comprises stacked lamination plates, wherein the lamination plates form at least two lamination packages, wherein the electric machine comprises a first cooling circulation with a first cooling fluid, wherein the stator of the electric machine comprises a second cooling circulation with a second cooling fluid, wherein a spacer element is arranged between the two lamination packages, the spacer element configured to set a predetermined distance between the lamination packages, whereby the first cooling fluid is allowed to flow between the lamination packages, and wherein a heat exchanger, which is an integral part of the spacer elements, is arranged to connect the first cooling circulation and the second cooling circulation to transfer heat from the first cooling fluid to the second cooling fluid, wherein the heat exchanger includes a first duct for the second cooling fluid, wherein the lamination plates comprise an opening therethrough, which defines a continuous second duct for the second cooling fluid within the lamination package, wherein the second duct is flow connected with the first duct, whereby the second cooling fluid is guided consecutively through the lamination package and the heat exchanger in one common continuous conduit.