Abstract: A combined pump and valve apparatus including a cylindrical casing, a shaft arranged symmetrically in the casing, a device fixedly attached to the shaft and in close fit with the cylindrical casing, thereby defining separated chambers within the casing, a plurality of outlets/inlets arranged along the circumference of the casing, and a plurality of axially arranged inlets/outlets, each of which is fixedly connected to a respective one of the separated chambers. The axially arranged inlets/outlets are alternately in fluid connection with each of the outlets/inlets fixedly arranged along the circumference of the casing in response to rotation of the shaft and the device with respect to the casing. An impeller arrangement pumps a fluid through the combined pump and valve apparatus in response to the rotation of the shaft.

Abstract: A rotating valve apparatus including a cylindrical casing, a shaft arranged symmetrically in the casing, a member fixedly attached to the shaft and in close fit with the cylindrical casing, defining separated chambers within the casing, at least one outlet fixedly arranged along the circumference of the casing and a plurality of axially arranged inlets, each of which is constantly in fluid communication with a respective one of the separated chambers. The axially arranged inlets are alternately in fluid connection with the outlet fixedly arranged along the circumference of the casing in response to rotation of the shaft and the member with respect to the casing. The member has an elliptically shaped cross section.

Abstract: A method for mounting a tube in a space having a shape corresponding to the shape of the tube. The tube is inserted into the space, pressurized with a hot pressure medium causing the tube to expand until the space is filled, then a cold pressure medium is substituted for the hot pressure medium while maintaining constant pressure causing the tube to solidify in its expanded shape. Also, a rotating electric machine having such a tube between windings of a high-voltage cable in a stator slot.

Abstract: A rotating electrical machine and method for making the machine, where the machine includes a high-voltage stator winding and elongated support devices for supporting the winding. The machine and method employ an arrangement of cable that is made of inner conductive strands, covered with a first semiconducting layer, which is covered with an insulating layer, which is covered with a second semiconducting layer. The cable is wound in slots in the stator such that separate cable lead-throughs are positioned in specific arrangements with respect to each other and in slots of the stator. The arrangement of the cable in the stator protects the integrity of the respective components in the cable and particularly the second semiconducting layer.

Abstract: For a method of operating of a synchronous compensator including a rotating electric machine including a rotor and a stator with at least one winding with a solid insulation enclosing the electric field, relevant parameters for temperature conditions in the rotor are determined, and during over-excited operation, to temporarily enlarge the field of operation of the synchronous compensator, cooling of the rotor is forced depending on a rotor temperature value determined from the parameters. The synchronous compensator measures parameters relevant for the temperature conditions of the rotor. A mechanism is also provided to force the cooling of the rotor depending on rotor temperature values determined from the parameters during over-excited operation of the electric machine.

Abstract: For a method of operating of a synchronous compensator comprising a rotating electric machine comprising rotor (46) and stator (2) with at least one winding with a solid insulation enclosing the electric field, relevant parameters for the temperature conditions in the rotor are determined, and during over-excited operation in order to temporarily enlarge the field of operation of the synchronous compensator, the cooling of the rotor is forced depending on a rotor temperature value (TR) determined from said parameters. Such a synchronous compensator comprises measuring means for measuring parameters relevant for the temperature conditions of the rotor. Means (36, 38) are also provided to force the cooling of the rotor (46) depending on rotor temperature values (TR) determined from said parameters during over-excited operation of the electric machine.

Abstract: The present invention relates to a stator for a rotating electric machine, comprising a stator, with a stator core and a winding, and a rotor, wherein said stator core is provided with stator teeth extending radially inwards, towards said rotor, characterized in that each stator tooth (3) is configured as a number of tooth sections (7) joined axially into a stator tooth plank (2) and that a number of stator tooth planks are fitted together side by side thus forming a section (1A, 1B, 1C, 1D; 31, 32, 33, 34) of a stator core or a complete stator core. The invention also relates to a corresponding method for use in the manufacturing of a stator, and a rotating electric machine including such a stator.

Abstract: In the stator winding in a rotating electric machine the winding is situated in radial slots (111) in the stator (106). According to the invention the winding consists of a cable which forms layers at different radial distances from the air gap (108) between the rotor (107) and the stator (106). The part of the cable (101) that passes to and fro once through the stator between different layers forms a coil (113) with an arcshaped coil end protruding from each end surface (114) of the stator (106). The coils (113) are divided into coil group parts. All coils (113) in the same coil group part are arranged axially, one outside the other with substantially coinciding centres and with successively increasing diameters. The number of slots (111) that are bridged by the coils (113) successively increases within the coil group part.

Abstract: A rotating electric machine, comprising a stator (1) wound with high voltage cable and provided with stator teeth (4) extending radially inwards from an outer yoke portion (23), wherein at least one stator tooth (4) in a tooth sector (18) is provided with at least one axially running cooling duct (24) connected to a cooling circuit (25) in which coolant is arranged to circulate and in that the axially running cooling tube (24) is connected at least at one end of the stator (1) to a clamping means (27, 28) for axial compression of the stator (1).

Abstract: The present invention relates to a mounting device (80) for reducing short-circuiting forces that are transmitted from a stator core to a stator body in a rotating electric machine comprising a stator with windings drawn through slots in the stator, wherein the stator core is composed of a number of packs (82), each of which includes a number of metal sheets, or of a number of metal sheets, each pack (82) or metal sheet having two identical grooves (84) arranged for cooperation with wedge members (86) designed to join together packs (82) or metal sheets, and wherein the stator body comprises beams (88), each connected to a wedge member (86). The mounting device (80) also comprises a connector (90) arranged through the beam (88) and secured in the wedge member (86) in order to connect the beam (88) and wedge member (86) in such a manner as to permit sliding between the wedge member (86) and the beam (88) in the event of short-circuiting. The windings also consist of high-voltage cable (10).

Abstract: The present invention relates to a laminated magnetic core for rotating electric machines. The laminated magnetic core comprises a number of stack members (40), each consisting of a number of sheets of metal joined together. Each stack member (40) is provided with two identical grooves (42) arranged to cooperate with wedge members (46) designed to join the stack members (40). The cross-sectional area of the groove (42) is larger than the cross-sectional area of the wedge member (46) and the wedge member (46) has two protrusions arranged symmetrically in relation to the longitudinal axis of the wedge member. The groove (42) has at least one part shaped to fit said protrusion. The stack members (40) in the laminated magnetic core are stacked on and partially overlapping each other to form different layers of stack members (40).

Abstract: The stator winding of a synchronous machine is made as a lap winding or as a wave winding and comprises a plurality of coils, each of which being composed of a top coil half (107) and a bottom coil half (105), the two coil halves, which are series-connected, to each other by means of a connecting device (106), being of identical shape.

Abstract: A coil having a slot portion intended to be arranged in slots in a stator or a rotor of an electrical machine is manufactured by forming a coil part including a bundle of electrically insulated conductors and insulation surrounding the bundle, arranging a portion of the coil part in a mould including at least two mould parts, surrounding the mould with a heat-shrinkable material which is penetrable by an impregnating resin, subjecting the thus composed product to pressing and heating in a tool which together with the mould gives the slot portion its final shape, the mould parts being spaced from each other to provide longitudinal gaps between their confronting longitudinal edges, and the heating of the product causing the heat-shrinkable material to shrink and retain the slot portion in its final shape after removal of the composite product from the tool, thereafter impregnating the insulation with an impregnating resin and transforming the insulation into a solid state.

Abstract: A tape of insulating material, provided with a binder, is fixed to an elongated, rectangular electrical conductor in a longitudinal direction thereof, the tape being brought into contact with a first side of the conductor before the other portions of the tape are folded around the conductor with the use of endless belts movable transversely to the longitudinal direction of the conductor for bringing the other portions of the tape in contact with at least two other adjacent sides of the conductor.