Power-supply device for the rotor winding of an electrical machine

摘要

The power-supply device contains a slipring (5) which is placed on the shaft (1) of the rotor via an electrically insulating layer (6) and makes contact with the brushes (7) of the busbars (9) of the brush contact device of the electrical machine. Arranged on at least one end of the slipring (5) is a current-distribution ring (11) to which that live rail (12) which is connected to the rotor winding (2) is attached and which makes contact with the slipring (5) via an additional current-conducting layer (29) which is designed from a material having a lower electrical resistivity than the material of the slipring (5). The slipring (5) and the current distribution ring (11) are designed with continuous openings (26, 27) which are arranged concentrically and whose longitudinal axes run parallel to the longitudinal axes of these rings. In this case, each of the continuous openings (26) corresponds to one of the continuous openings (27) which are arranged on the same axis as the first openings such that they form a unified ventilation duct (28). The tubes of the additional layer (29), which electrically connect the current distribution ring (11) to the slipring (5), are arranged in the ventilation ducts (28). The power-supply device can be used particularly advantageously in fast-running, high-performance turbogenerators. <IMAGE>