Patent ID: 9509189
Filing Date: 2016-11-29
CPC Classification: H02K

Claim Text:
1. Magnetic wedge for closing slots of an electrical rotating machine, said magnetic wedge extending longitudinally by a first length, between two ends, along a first direction parallel to the axis of rotation of the electrical rotating machine and extending crosswise to the first direction between two side edges, said magnetic wedge comprising: a first portion of magnetic material; a second portion of non-magnetic material coupled to said first portion, wherein said wedge has a first surface intended to face the slots of the electrical rotating machine, when said wedge is placed to close the slots, and an opposite second surface intended to face the air gap of the electrical rotating machine, when said wedge is placed to close the slots, said second portion comprises at least one skew portion longitudinally extended along a second direction which is skew relative to the first direction, by a second length equal to at least 70% of the distance between said two ends, measured along the second direction, said first portion comprises a single piece extending seamlessly along the first direction by the first length between said two ends, and extending crosswise to the first direction between said two side edges, said first portion comprises a first surface intended to face the slots of the electrical rotating machine when said wedge is placed to close the slots, and an opposite second surface intended to face the air gap of the electrical rotating machine when said wedge is placed to close the slots, said first portion has a groove formed in one of said first and second surface of the first portion and extending longitudinally along said second direction, said groove exhibits a bottom and two side walls and an opening facing the slots or the air gap, and said at least one skew portion of the second portion is positioned within said groove by the entire longitudinal extension of the groove.