Abstract: A rotor disk for a rotor of a synchronous reluctance machine consists of a disk body material with high magnetic permeability. In order to improve the ability of the rotor disk to stand centrifugal and thermal loads, spokes extending in radial direction between a shaft opening and a disk periphery are provided with spoke openings. These openings extend over a wide distance both in circumferential direction and in radial direction to worsen the heat conducting properties of the spokes and to render the spokes less stiff.

Abstract: A rotor disk for a rotor of a synchronous reluctance machine consists of a disk body material with high magnetic permeability. In order to improve the ability of the rotor disk to stand centrifugal and thermal loads, spokes extending in radial direction between a shaft opening and a disk periphery are provided with spoke openings. These openings extend over a wide distance both in circumferential direction and in radial direction to worsen the heat conducting properties of the spokes and to render the spokes less stiff.

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: In a plant containing a turbo-generator the magnetic circuit of the turbo-generator is included in an electric generator which directly supplies a high supply voltage of 20-800 kV, preferably higher than 36 kV. The insulation of the generator is built up of a cable (6) comprising one or more current-carrying conductors (31) with a number of strands (36) surrounded by outer and inner semiconducting layers (34, 32) and intermediate insulating layers (33). The outer semiconducting layer (34) is at earth potential. The phases of the winding are Y-connected. The Y-point may be insulated and protected from over-voltage by means of surge arresters, or else the Y-point may be earthed via a suppression filter.

Abstract: The magnetic circuit of a generator in a hydro-generator plant is arranged to directly supply a high supply voltage of 20-800 kV, preferably higher than 36 kV. The generator is provided with solid insulation and its winding includes a cable (6) comprising one or more current-carrying conductors (31) with a number of strands (36) surrounded by at least one outer and one inner semiconducting layer (34, 32) and intermediate insulating layers (33). The outer semiconducting layer (34) is at earth potential. The stator winding may be produced with full or fractional slot winding, the phases of the winding being Y-connected. The Y-point may be insulated and protected from over-voltage by means of surge arresters, or else the Y-point may be earthed via a suppression filter. The invention also relates to a hydro-generator plant, a generator included in the plant and a procedure for building such a plant.

Abstract: The invention concerns a method of dismantling a cooling tube (1) of polymer material and an elongate cutting tool used in said method. According to the method said tube (1) being fixed in an axially running cooling duct (2) in a stator tooth (3) of a stator (4) of a high-voltage rotating electric machine is cut at an axial level close to the stator (4) at both ends of the stator tooth (3). Then the cutting tool having a radially protruding cutting edge is inserted into the cut tube (1) at one of said ends, said tool being forced through the tube (1) along said duct (2) thereby slitting the tube (1) from inside. Thereafter the slit tube (1) is pulled out of the duct (2) with a twisting movement that causes breakage of the tube wall along the slit (7) and thus reduction of the tube diameter.

Abstract: A device for avoiding wear between the cables in coilend packages on the stator (1) in a rotating electric machine comprises a resilient layer (10) in the contact area between two cables (4). The cables (4) are mutually secured by a securing device (12). The resilient layer (10) permits a certain relative movement between the cable (4) due to skewing of the resilient material and not due to sliding in the contact area.

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: 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: A rotating electric machine with high-voltage stator winding and spring-device supporting the winding and method for manufacturing the same is employed for high-voltage applications. In particular, the machine includes a stator with a winding that is made of a high-voltage cable that is drawn through a slot in the stator of the rotating electric machine. A spring member biases the high-voltage cable against a wall of the stator so as to avoid damaging an outer surface of the cable during operation of the machine. The outer surface of the cable is susceptible to being damaged because an outer surface of the cable includes a semiconducting material that could possibly be damaged if subject to vibration or abrasion against a slot wall of the slot.

Abstract: A rotating electric machine and method for manufacturing the same in which a high-voltage cable is wound in a stator so as to make a winding. A feature of the high-voltage cable is that the cable includes an inner semiconducting layer, a solid insulation material, and an outer semiconducting layer. A casting compound is supplied in a slot that holds the cable in the stator so as to avoid damaging an outer surface of the cable.

Abstract: A filter unit for airtight attachment to a framework of a cleanroom ceiling includes a filter, a circumferential wall surrounding the filter, and a downwardly projecting sealing knife to be received in a sealant containing groove formed in said framework. The sealing knife includes vertical weldable wall elements interconnected by welding and mounted on the circumferential wall by airtight mounting means.

Abstract: A fan module for clean room applications, comprising outer, vertical restriction walls (5) with a lower edge part (6) having a planar lower surface (7) as well as an element (9) protruding from the outer edge of the planar lower surface for cooperation with a filter docking module (2) provided in a roof filter frame (4) having a substantially planar upper surface (8) with an extension corresponding to said planar lower surface, whereby said protruding element (9) is designed to overlap part of said filter docking module (2).

Abstract: A beam construction for ceilings in clean rooms, comprising first (1) and second (2) beams. The first and second beams are arranged essentially horizontally and perpendicularly to each other and have longitudinal ducts (7) for receiving a liquid or viscous sealant. In order to facilitate mounting and increase the flexibility of the beam construction, a transition piece (12) is arranged between two beam elements (1a, 1b) which are arranged successively in the longitudinal direction, thereby forming an opening (14) in at least one side-limiting duct wall (6) of the first beam (1). A second beam (2) is arranged sealingly against the transition piece (12) and the first beam elements (1a, 1b) arranged on each side thereof, such that the ends of the duct walls (6) of the second beam encompass the thus-formed opening (14).

Abstract: An arrangement for supplying air to a room, preferably a clean room, which is divided into zones (A, B, C) with different climatic requirements, comprises a first air treatment unit (11) for supplying air to a pressure chamber (5) which is shared by a plurality of zones and from which air is supplied to the various zones. The arrangement also comprises at least one mixing spaced (14) communicating with the pressure chamber (5) and a second air treatment unit (17). The mixing spaced is intended for mixing of the air from the first (11) and the second (17) air treatment unit. The mixing space also communicates with at least one of the zones (B) for supplying the mixed air to this zone (B).

Abstract: A clean-room wall including vertically extending wall profile members (2,4,6) against which one or several wall panels (10) are mounted. In their sides, facing the interior (14) of the room, the profiles are formed substantially parallel with the wall extending flanges (8) against which the wall panel is arranged from the outside, as seen from the interior of the room. Fastening mechanisms (12) are arranged at the outside of the wall panel for fastening of the panel to the profile flange members.

Abstract: A contact nozzle for a wire-shaped welding electrode for arc welding is designed as a contact tube in the front section and as a guide channel for the electrode in the rear section. The guide channel is formed by an open groove made in the nozzle body. The feed by the electrode is hindered in the rectilinear feed direction by a convex projection of the groove wall. Particles, dragged into the nozzle with the electrode, fall out of the open groove and therefore cannot displace the contact tube.

Abstract: In a method and a device for assortment of objects a broadbanded light is emitted from a light source, which light is reflected via a rotary mirror against the objects falling freely immediately after they have left a conveyor belt. The reflected light is led via the other part of the same surface of the rotary mirror to an optical unit and is reflected against a double detector dividing the light flow into two wide ranges about 1 .mu.m. The detector signals are compared to one another and after processing the resulting signal is caused to actuate means separating the objects mechanically.