Patent ID: 6396187
Filing Date: 2002-05-28
Classification: H02K

Abstract:
A laminated magnetic core for rotating electric machines, wherein said laminated magnetic core comprises:a number of stack members each including a number of sheets of metal joined together, each stack member having a pair of identical grooves of selected cross-sectional area; wedge members of selected cross-sectional area including a maximum width dimension arranged to cooperate with the grooves to join said stack members together, wherein the cross-sectional area of the groove is larger than the cross-sectional area of the wedge member, and the grooves each have an entrance larger than the maximum width dimension of the cross section of the wedge member, the wedge member including a pair of two protrusions arranged symmetrically in relation to a longitudinal axis of the wedge member, said groove having at least one portion shaped to fit said protrusion, the stack members in the laminated magnetic core being stacked on and partially overlapping each other to form different layers of stack members, the grooves in the stack members in the various layers being arranged substantially opposite each other with the wedge members arranged in the grooves with a protrusion abutting the complementary shape of the groove in such a manner that the stack members in one layer are secured counter-clockwise in tangential direction and that the stack members in at least one of the adjacent layers are secured clockwise in tangential direction, and the laminated magnetic core includes locking members arranged at least at a transition between layers secured clockwise and layers secured counter-clockwise in order to prevent tangential movement between the different layers.