Patent ID: 8427018
Filing Date: 2013-04-23
Classification: H02K

Abstract:
1. A stator for a rotary electric machine, the stator comprising: a jacket; and a stack of stator laminations located inside the jacket, each lamination of the stack comprising subassemblies, wherein: the subassemblies include extensions having flow channels for passing a cooling fluid therethrough, each extension comprising a plurality of fins forming the flow channels between them, the subassemblies are disposed to subject the cooling fluid flowing along the stack of stator laminations to a first succession of passes within the flow channels and a second succession of passes through wide zones extending between the flow channels, the laminations of the stack being configured such that for at least one extension, a first flow section made available to the flow of the cooling fluid within the extension is greater than a second flow section defined by a space extending radially between a top of the extension and the jacket, at least two fins of the plurality of fins are connected together by a peripheral connection, with at least one of the flow channels being formed between the at least fins, the flow channels include at least two first radially inner edges that are situated angularly in alignment with two consecutive teeth of the stator and a second radially inner edge situated angularly in alignment with a slot between the two consecutive teeth, and the two first radially inner edges are closer to an axis of the stator than the second radially inner edge.