Electric-machine stator bar winding
First Claim
1. An electric-machine stator bar winding whose bar end portions have involute and straight-line sections and which comprises in the end windings:
- an arrangement for electrical insulation of end connections of extreme bars included in different phase groups of said bar winding,said end connections being separated from one another by interphase regions,said arrangement for the electrical insulation comprising a plurality of box-type dielectric screens encompassing each one of said end connections,said box-type dielectric screens being installed in pairs in such a manner that, in each of said interphase regions, said box-type dielectric screens have adjacent walls lying in the radial planes of the electric-machine stator,each of said box-type dielectric screens being built up by angle-shaped and channel-shaped members made from an electrically insulating thermosetting material,said angle-shaped and channel-shaped members being installed in such a manner that each of said adjacent walls of each of said pairs of said box-type dielectric screens is formed by adjoining walls of said angle-shaped members, wherein a wall of each of said box-type dielectric screens, lying in the radial plane of said electric-machine stator, but lying opposite to said adjacent walls, is formed by the wall of said channel-shaped member, whereas an inner wall and an outer wall of each of said box-type dielectric screens lie in the tangential planes of said electric-machine stator, and each of said walls is formed by one flange of said channel-shaped member and a flange of said angle-shaped members adjoining each other with an overlap,each of said angle-shaped and channel-shaped members having bent end parts,said bent end parts of said angle-shaped and channel-shaped members extending along said involute sections of said extreme bars and adjoining the surface thereof, anda plurality of members for tangential fastening of said end portions of said bars,each of said tangentially fastening members being made from an electrically insulating moulding material,each of said tangentially fastening members adjoining a portion of the surface of said adjacent walls of said box-type dielectric screens in said pairs thereof and a portion of the surface of involute sections of said end portions of the extreme bars of said winding.
0 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is an electric-machine stator bar winding provided with an arrangement for electric insulation of end connections of extreme bars of different phase winding groups, that comprises box-type dielectric screens encompassing said connections. Each of the screens is built up of channel-shaped members made from a thermosetting material and having bent end portions. These members are so installed that adjacent walls of a pair of the screens in one interphase region of the end windings, lying in the radial planes of the stator are formed by adjoining walls of the angle-shaped members, the walls of the screens which are opposite to the adjoining walls are formed by the walls of the channel-shaped members, whereas the walls of the screens, lying in the tangential planes of the stator are formed by the flanges of the channel-shaped and angle-shaped members, the bent end portions of these members adjoining a part of involume sections of the bar end portions. The end windings have members used for tangential fastening of the bar end portions, which members are made from an electrically insulating moulding material, arranged in the interphase regions, and entering the regions of arrangement of the involute sections of the bars.
-
Citations
16 Claims
-
1. An electric-machine stator bar winding whose bar end portions have involute and straight-line sections and which comprises in the end windings:
-
an arrangement for electrical insulation of end connections of extreme bars included in different phase groups of said bar winding, said end connections being separated from one another by interphase regions, said arrangement for the electrical insulation comprising a plurality of box-type dielectric screens encompassing each one of said end connections, said box-type dielectric screens being installed in pairs in such a manner that, in each of said interphase regions, said box-type dielectric screens have adjacent walls lying in the radial planes of the electric-machine stator, each of said box-type dielectric screens being built up by angle-shaped and channel-shaped members made from an electrically insulating thermosetting material, said angle-shaped and channel-shaped members being installed in such a manner that each of said adjacent walls of each of said pairs of said box-type dielectric screens is formed by adjoining walls of said angle-shaped members, wherein a wall of each of said box-type dielectric screens, lying in the radial plane of said electric-machine stator, but lying opposite to said adjacent walls, is formed by the wall of said channel-shaped member, whereas an inner wall and an outer wall of each of said box-type dielectric screens lie in the tangential planes of said electric-machine stator, and each of said walls is formed by one flange of said channel-shaped member and a flange of said angle-shaped members adjoining each other with an overlap, each of said angle-shaped and channel-shaped members having bent end parts, said bent end parts of said angle-shaped and channel-shaped members extending along said involute sections of said extreme bars and adjoining the surface thereof, and a plurality of members for tangential fastening of said end portions of said bars, each of said tangentially fastening members being made from an electrically insulating moulding material, each of said tangentially fastening members adjoining a portion of the surface of said adjacent walls of said box-type dielectric screens in said pairs thereof and a portion of the surface of involute sections of said end portions of the extreme bars of said winding. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
Specification