Abstract: A rotor for an electric machine has winding elements which are arranged in axially running grooves of a rotor body and having a winding head which is arranged axially next to the rotor body. The winding elements exit from the grooves in the axial direction in the region of the winding head and run in the axial direction in the region of the axial ends of the winding elements. Each of the winding elements has four curved portions in the region of the winding head. The rotor includes a plurality of tension bolts and a winding head carrier. The tension bolts connect the winding head to the winding head carrier and penetrate through the winding head radially.

Abstract: In an assembly for electrically exciting the rotor of an electrical machine, the wear of the sliding contacts is reduced in operating conditions with low current density in that an AC current is injected. The additional injection of the AC current is superimposed upon the DC current. The rotor poles function as an open circuit with respect to the AC current through a co-rotating capacitor.

Abstract: In an assembly for electrically exciting the rotor of an electrical machine, the wear of the sliding contacts is reduced in operating conditions with low current density in that an AC current is injected. The additional injection of the AC current is superimposed upon the DC current. The rotor poles function as an open circuit with respect to the AC current through a co-rotating capacitor.

Abstract: A rotor for an electric machine has winding elements which are arranged in axially running grooves of a rotor body and having a winding head which is arranged axially next to the rotor body. The winding elements exit from the grooves in the axial direction in the region of the winding head and run in the axial direction in the region of the axial ends of the winding elements. Each of the winding elements has four curved portions in the region of the winding head. The rotor includes a plurality of tension bolts and a winding head carrier. The tension bolts connect the winding head to the winding head carrier and penetrate through the winding head radially.

Abstract: A method for producing insulated winding elements for an electric machine includes steps V1 to V6, as follows: V1—providing a line element; V2—applying an insulation; V3—impregnating the insulation with resin; V4—inserting the insulated winding element into a press mold (1) and pressing; V5—curing the impregnation; V6—removing the winding element from the press mold (1) and cleaning the press mold (1). The base body (10) of the press mold (1) is formed of metal, and the surfaces of the press mold (1) that come into contact with resin during the process have a coating. The coating has two sublayers (11, 12). A first sublayer (11) is in direct contact with the base body (10) and is formed as a priming coat. A second sublayer (12) is in direct contact with the priming coat (11) and is formed as an anti-adhesion layer of fluorinated polyurethane.

Abstract: The invention relates to an electric generator, comprising a rotor; a stator enclosing the rotor; a housing; a water-operated cooling device, comprising a water inlet and a water outlet and channels in the rotor and stator for guiding cooling water through the same; the housing is enclosed; the water-operated cooling device is the only cooling device of the generator.

Abstract: The invention relates to a corona shield for an electrical conductor in a rotating electric machine, comprising an outer corona shield and a terminal corona shield which is mounted adjacent to the outer corona shield, on a high-voltage insulation of the electrical conductor, and also comprising a strip that has a limited electrical conductivity, is arranged around the high-voltage insulation of the electrical conductor, and is impregnated with a resin. The invention is characterized in that a paint having a limited electrical conductivity is arranged at least between the high-voltage insulation and the strip, in the transition zone between the outer corona shield and the strip of the terminal corona shield.

Abstract: Provided is a rotor for a dynamoelectric machine. The rotor includes winding elements arranged in axially extending grooves of a rotor body, a winding head arranged axially adjacent to the rotor body, and a winding head carrier, connected to the winding head by means of tension bolts, all arranged in such a way that reliable securing of the winding head against radial expansion due to centrifugal forces is ensured, while resulting in a compact and cost-effective configuration as well as sufficient cooling.

Abstract: A dynamoelectric machine includes a rotor body, an annular winding head which is arranged axially next to the rotor body and coaxially in relation thereto, a support ring which is arranged radially inside the winding head and coaxially in relation thereto, the winding head and the support ring are torsion-proof with the rotor body, the winding head and the support ring are clamped together in the radial direction by tension rods which are guided through radial boreholes in the winding heads and in the support ring, where radially inner ends of the tension rods engage on the support ring and radially outer ends of the tension rods engage on bearing blocks which rest on the winding head, and the radially inner ends of the tension rods and the radially outer ends of the tension rods are mounted by the bearing blocks having a spherical surface.

Abstract: The invention concerns a monitoring device for a double-fed electrodynamic asynchronous machine, having a stator and a rotor body held rotatably therein, whose shaft is mounted on at least one bearing, and at least one insulation layer for electrical insulation of the rotor body with respect to a zero potential. The invention is characterised by at least one contact element for tapping an electric voltage, which is applied with respect to the zero potential by means of said at last one insulation layer, and a measuring and signalling unit, which is connected to the contact elements for measuring the applied voltage and is designed for emitting a warning signal depending on the height of said voltage.

Abstract: The invention concerns an asynchronous machine having a slip-ring rotor for use with a variable rotational speed, with a rotor, a rotor body, having grooves mounted radially into the rotor body, winding elements of the rotor, from which respectively at least one element runs axially through each of the grooves, locking elements, which co-operate in a form fit manner with the rotor body and close the grooves radially and outwardly, a high voltage insulation with outer corona protection around each of the winding elements. The invention is characterised in that between the outer corona protection of the winding element and at least one neighbouring wall of the groove in peripheral direction electrically conducting connecting means are arranged for releasable connection of the winding element with the rotor body.

Abstract: A method for producing tape for an electrical insulation system, including the following steps: providing a porous insulation paper; providing a resin that has nano-scale particles suspended therein; saturating the insulation paper with the resin such that the resin and particles become dispersed in the insulation paper; and finishing the tape.

Abstract: A method for producing an electrical insulation system of a conductor of a winding head of an electric machine is provided. The method includes applying a porous main insulation paper to the conductor of the electrical machine; applying a porous overhang corona shielding paper to the main insulation paper, as a result of which an insulation blank of the insulation system is formed; impregnating the insulation blank with a base resin, wherein the overhang corona shielding paper and the main insulation paper have a porosity such that the insulation blank is impregnated by the base resin to form a homogeneous base resin matrix; and completing the insulation system by curing the base resin.

Abstract: The invention relates to a rotor for a dynamoelectric machine, having the following features: winding elements which are arranged in axially extending grooves of a rotor body; a winding head which is arranged axially adjacent to the rotor body, wherein in the region of the winding head the winding elements exit the grooves in the axial direction, then extend at an angle to the axial direction, and then extend in the axial direction again in the vicinity of the axial ends of said winding elements, and are connected with further winding elements; a winding head carrier which is radially arranged within the winding head; the winding head is connected with the winding head carrier by means of tension bolts which engage at the radially outer ends thereof on support bodies, which in turn lie on the winding elements in the region of the winding head; the tension bolts penetrate the winding head in the radial direction in the axially extending areas or the areas of the bending of the winding elements from the axia

Abstract: The invention relates to an electric generator, comprising a rotor; a stator enclosing the rotor; a housing; a water-operated cooling device, comprising a water inlet and a water outlet and channels in the rotor and stator for guiding cooling water through the same; the housing is enclosed; the water-operated cooling device is the only cooling device of the generator.

Abstract: The invention relates to a dynamoelectric machine, comprising the following components or features: a rotor body; annular winding heads arranged axially next to the rotor body and coaxially in relation thereto; a support ring which is arranged radially inside the winding heads and coaxially in relation thereto; the winding heads and the support ring are torsion-proof with the rotor body; the winding heads and the support ring are clamped together in the radial direction by tension rods which are guided through radial boreholes in the winding heads and in the support ring.