Rotor winding for an electrical machine and method for operating

Details Rotor winding for an electrical machine and method for operating Rotor winding for an electrical machine and method for operating

1998-10-19

2000-07-11

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310 59, 310 60R, 310 61, 310270, H02K 324, H02K 346

Patent

active

060877456

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.

REFERENCES:
patent: 2778959 (1957-01-01), Kilner
patent: 2833944 (1958-05-01), Willyoung
patent: 2844746 (1958-07-01), Coggeshall
patent: 4543503 (1985-09-01), Kaminski et al.
patent: 4656382 (1987-04-01), Moore et al.
patent: 4709177 (1987-11-01), Kaminski
patent: 5777406 (1998-07-01), Bomba et al.

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