Directly liquid cooled rotor winding for a non-salient pole synchronous electric machine

Claim 1

A directly liquid cooled rotor winding for a synchronous electric machine having non-salient poles, comprising: windings of said poles of said rotor; concentrically arranged and wound in a similar direction coils included in said winding of each one of said poles; leads of said coils, positioned to one side of said rotor and projecting beyond the coil end portion of said rotor; directly liquid cooled auxiliary U-shaped conductors arranged concentrically to each other under said face end portion of said rotor, said auxiliary conductors electrically connecting said coils in serial relationship; ends of said auxiliary connectors extending axially beyond said coil end portion in the respective sectors of the upper and of the lower ones of said leads of said coils, said auxiliary conductors being electrically connected with the respective ones of said leads either directly or through jumpers of solid cross-section, inter-pole electric connections being effected in the area of the axial portion of said coil end portion of said rotor, on the side thereof where said coil leads are positioned, with the help of at least two jumpers of solid cross-section, each one of said jumpers connecting the upper conductor adjoining the lead of the biggest coil of the respective one of said poles to the adjacent upper conductor of the biggest coil of the other one of said poles.