Rotor winding for an electrical machine and method for operating the rotor winding
First Claim
1. A rotor winding for an electrical machine, comprising:
- a rotor axis;
a multiplicity of electrically conductive turns stacked radially relative to said rotor axis, having an interior, and forming a plurality of axial sections as well as a plurality of tangential sections;
each axial section formed approximately straight, aligned approximately parallel to said rotor axis, having associated first cooling channels aligned meridionally relative to said rotor axis and passing through all of said turns;
each tangential section bent about said rotor axis, connecting two of said axial sections to one another and having associated second cooling channels, each second cooling channel located in said interior of a respective turn, having a separate cooling flow path from a cooling flow path of said associated axial sections of said turn, and discharging in circumferential direction;
a rotor body having slots formed therein and two axial ends and shaft pieces each projecting from a respective one of said axial ends and extending under a respective one of said tangential sections, said axial sections disposed partially within said slots and partially outside said rotor body and said tangential sections disposed outside said rotor body; and
insulating cylinders each extending as far as said rotor body at a distance from a respective shaft piece, said tangential sections each disposed on a respective one of said insulating cylinders at each axial end.
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Accused Products
Abstract
A rotor winding for an electrical machine, in particular an air-cooled turbogenerator, includes a rotation axis and a multiplicity of electrically conductive turns which are stacked radially relative to the rotation axis and form a plurality of axial sections and tangential sections. Each axial section is formed approximately in a straight line, is aligned approximately parallel to the rotation axis and has first cooling channels which are aligned meridionally relative to the rotation axis and pass through all of the turns. Each tangential section is bent about the rotation axis, connects two axial sections to one another and has associated second cooling channels, each of which is located in the interior of a respective turn. If required, third cooling channels, each of which is constructed in such a way that it meanders meridionally, are provided at the axial sections. A method for operating the rotor winding includes rotating the rotor winding about the rotation axis, conducting electrical current through the rotor winding, and cooling the rotor winding with a gaseous coolant, especially air, flowing through the cooling channels.
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Citations
11 Claims
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1. A rotor winding for an electrical machine, comprising:
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a rotor axis; a multiplicity of electrically conductive turns stacked radially relative to said rotor axis, having an interior, and forming a plurality of axial sections as well as a plurality of tangential sections; each axial section formed approximately straight, aligned approximately parallel to said rotor axis, having associated first cooling channels aligned meridionally relative to said rotor axis and passing through all of said turns; each tangential section bent about said rotor axis, connecting two of said axial sections to one another and having associated second cooling channels, each second cooling channel located in said interior of a respective turn, having a separate cooling flow path from a cooling flow path of said associated axial sections of said turn, and discharging in circumferential direction; a rotor body having slots formed therein and two axial ends and shaft pieces each projecting from a respective one of said axial ends and extending under a respective one of said tangential sections, said axial sections disposed partially within said slots and partially outside said rotor body and said tangential sections disposed outside said rotor body; and insulating cylinders each extending as far as said rotor body at a distance from a respective shaft piece, said tangential sections each disposed on a respective one of said insulating cylinders at each axial end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification