Abstract: A water chamber cover for connecting a water hose to a water chamber bottom plate of a directly water-cooled stator bar, having a peripheral groove, which is open on a side facing away from the water chamber and which is designed to hold the water hose. A method is for assembling a cooling water circuit for a directly water-cooled stator bar.

Abstract: A method for repairing solder joint leakages on a connection unit designed to feed cooling water into hollow metallic stator bars of a stator winding of an electrical machine, wherein the connecting device includes a metallic bar-receiving body with a passage opening in which the stator bars are inserted, aligned using metallic spacers and connected fluid-tightly to the bar-receiving body and to the spacers by substance bonding using a solder. The free ends of the stator bars terminate substantially flush with the free ends of the spacers and with an end face of the bar-receiving body. A cup-like metallic cover element surrounds and connects the free ends of the stator bars fluid-tightly to the bar-receiving body by substance bonding so as to form a cooling water chamber. A metallic cooling water line connection is provided on the cover element and connected fluid-tightly to the cooling water chamber.

Abstract: A corona shield for an electric machine, has a varnish that contains a first polymer resin, first electrically conductive particles that are dispersed in the first polymer resin, and microcapsules which are dispersed in the first polymer resin and include a second polymer resin in their interior.

Abstract: A blade for a fan that can be arranged on a rotor shaft of a rotor of a rotating electric machine, in particular a generator, wherein the blade is at least partially formed from a fiber composite material that has a polymer matrix with mineral fibers embedded therein. A method for producing a blade for a fan arrangeable on a rotor shaft of a rotor of a rotating electrical machine, in particular a generator, wherein the blade is produced using an injection molding method, and wherein a fiber composite material of a polymer matrix with mineral fibers embedded therein is used as injection molding material.