Rotor of an electrical machine having an excitation current...

Details Rotor of an electrical machine having an excitation current... Rotor of an electrical machine having an excitation current...

H - Electricity

02

K

H02K 3/04 (2006.01) H02K 9/00 (2006.01)

Patent

CA 2082477

ABSTRACT OF THE DISCLOSURE In large electrical machines, the electrical connection between the excitation supply line (7, 8), which runs axially, centrally in the rotor, and the excitation winding conductors (4) in the winding over- hang (3) of the rotor is highly stressed electrically and mechanically. It must therefore be forced-cooled. Effective cooling can be achieved if a portion of the cooling gas from the cold gas chambers is guided through special radial shaft holes (20) to the shaft axis and then radially outwards through or along the excitation supply line bolt (13) into the hot gas space (H) in the rotor winding overhang space. (Fig. 1)

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