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Present invention relates to an antiwear additive containing micelles based on iron oxide Fe3O4 grease molecules surrounded by oleic acid molecules, wherein the Fe3O4 micelle nucleus is doped with Co (II), with the following ratio of components, wt %: Co (II) - 6%, Fe3O4 - 94%. |
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Transformer with three-phase and circular windings Invention relates to electric engineering and may be used in multi-phase semiconductor converters, in particular, in rectifiers, inverters and frequency converters. A transformer with rotary magnetic field, three-phase and circular windings comprises an inner laminated magnetic conductor made of plates with semi-closed slots for full height of coil groups, where a three-phase winding and a circular winding are laid with taps. An external laminated magnetic conductor in the form of a hollow cylinder, which is moved onto the inner laminated magnetic conductor with an air gap, providing for necessary linearity of the main magnetisation curve by rotary magnetic field, providing for improved spectral composition of the magnetic field curve, and closing main magnetic flux, developed by windings arranged in slots of the inner magnetic conductor. |
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Invention relates to electric engineering, to high voltage transformers for cascade connection. A high voltage transformer (1) for cascade connection includes a primary winding (8), a high voltage winding (16) and a magnetic conductor (4) with a secondary winding (24). The primary winding and high-voltage winding (8, 16) concentrically cover at least a part of the magnetic conductor (4). The high voltage winding (16) comprises one or several separate layers joined in parallel. |
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Self-induced emf pulse generator Invention relates to electrical engineering and namely to structures of induction current generators, and can be used in electromagnetic plants and electrical machines, such as motors, generators, transformers, and namely as a step-up transformer. |
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Production of magnetically hard coat from alloy of samarium with cobalt Layer-by-layer spraying by plasmatron of the powder of alloy of samarium with cobalt fused in plasma jet high-temperature zone on cooled substrate at the following ratio of components: samarium - 40 wt %, cobalt making the rest. Spraying is performed in the chamber of used inert gases of plasmatron at spraying spot temperature of 800-900°C. |
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Texture electric steel sheet and method of its production Steel sheet, 0.30 mm thick or less, comprises forsterite film and coat to create strain on steel sheet surface, liner grooves made at 2-10 mm spacing on sheet surface in direction of rolling for modification of magnetic domain. Note here that depth of every said groove makes 10 mcm or larger. Forsterite film thickness at linear groove bottom makes 0.3 mcm or larger. Total strain at steel sheet created by forsterite film and coat makes 10.0 MPa or higher in direction of rolling. Fraction of losses from eddy currents in steel sheet iron W17/50 makes 65% or less in variable magnetic field of 1.7 Tl and 50 Hz created in sheet steel in direction of rolling. |
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Device for creation of homogeneous variable magnetic field Invention relates to electrical engineering and can be used for creation of a homogeneous variable magnetic field. The device includes upper and lower Helmholtz coils and is provided with a laminated core, which has two cylindrical cavities with upper and lower end poles, in which Helmholtz coils are installed. A capacitor is connected to in-series connected Helmholtz coils, and power supply of the formed series circuit is performed by means of current of resonant frequency of the formed oscillating circuit. |
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Electronic device and suction cup suitable for said electronic device Invention relates to an electronic device with a suction cup. The electronic device has at least an electronic element and a suction cup for detachable mounting of the electronic device to a wall. The suction cup has a flexible plastic cup and an electromagnetic coil, which is electrically connected to the electronic element. The electromagnetic coil is placed on the flexible plastic cup on a side thereof remote from the side to be connected to the wall, or the electromagnetic coil is enclosed in the flexible plastic cup. |
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Solenoid for electromagnetic valve Invention refers to electrical engineering and electromagnetic valves. Magnetic plate positioned around moving iron core to form magnetic conductor between magnetic frame and moving iron core includes a section protruding towards immobile iron core along the surface of moving iron core. Area Sa of external surface section of moving iron core opposite to internal surface of the magnetic plate, and area Sb of moving iron core cross-section are set as K=Sa/Sb, K>1. Axial length h of internal surface of the magnetic plate and length L from attracting surface of moving iron core separated from immobile iron core by pullback spring to the front end of the magnetic plate complies with the condition of 2≤K≤ (K value when h=L). |
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Method of obtaining nanostructured layers of magnetic materials on silicon for spintronics Method of obtainment of nanostructured magnetic material layers on silicon for spintronics involves magnetronic spraying of composite target consisting of 85-99% of silicon and 1-15% of ferromagnetic material, performed in argon medium, with process chamber pressure (6÷7)×10-3 Pa during spraying, argon pressure in magnetron of (6÷7)×10-1 Pa, application rate for heterogenic magnetic material mix of (22÷25) nm/s, plasmachemical etching in fluorine-containing plasma at nitrogen pressure in process chamber of 4÷4.5 Pa, layer etching rate of (10÷12) nm/s, and thermal processing in vacuum at 0.5×10-3 Pa, 300-400°C for 10-15 minutes. |
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High-voltage pulse transformer Invention refers to electric engineering, particularly to high-voltage pulse devices, and can be applied in small accelerators of charged particles, x-ray units, etc. High-voltage pulse transformer includes dielectric case with primary winding on its surface. The case houses dielectric frame to which secondary winding is attached. Both windings are single-layered, the case is filled with fluid dielectric. According to invention, the primary winding consists of two turns in the form of cylindrical rings with a slit along generatrix, and is located at internal surface of the case. Each ring is attached by two conductive sealing elements brought out through ring and case walls in radial direction and featuring electric clamping contact with a ring, and by threaded dielectric bushing with cone section, ensuring ring clamping to respective end lug and internal case surface. |
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Magnetooptic material is an epitaxial monocrystalline film of iron garnet of the composition (YBi)3(FeGa)5O12, which is grown on a substrate of nonmagnetic garnet with a high lattice constant a = 12,380 A o / − 12,560 A o / . The epitaxial film contains 0.1-0.4 formula units of Mg2+ ions. The substrate of nonmagnetic garnet can be made from (GdCa)3(GaMgZr)5O12, or Ca3(NbLi)2Ga3O12, or Ca3(NbMg)2Ga3O12, or Ca3(NbZr)2Ga3O12. The disclosed material has a magnetooptic figure of merit of 56-60 deg/dB at λ=0.8 mcm, 350-380 deg/dB at λ=1.3 mcm, coercitive force of about 2.5-15.3 Oe. |
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Invention relates to composite magnetic materials. Disclosed is a composite magnetic elastomer which consists of a matrix of a highly elastic polymer and filler consisting of magnetic particles, wherein the filler used is particles of an electroconductive magnetic filler in concentration of 10-90% of the total weight, the surface of which is precoated with a surfactant film. |
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Invention is related to electric engineering and may be used both in laboratory conditions and in processing equipment using homogeneous magnet fields of different levels. The technical result consists in increase of the magnetic field homogeneity. Helmholtz coils are placed to an external shell-type magnetic core made of the upper and lower identical cylindrical cavities for the Helmholtz coils and surveyed objects coupled by their butt ends, and axes of these cavities are compliant. Outer faces of the magnetic core are rounded with a radius equal to the radius of the Helmholtz coils. In result of the magnetic resistance reduction in a space surrounding the Helmholtz coils the level of magnetic flux density is increased in a workspace of the device. At that deformation of the magnetic field lines takes place so that the lines in the central near-axial part of the workspace are reduced relatively to the larger extent than the lines in the peripheral part of the workspace. |
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Supply source transformer for suspended measuring sensors Invention is related to an arrangement of supply sources for suspended measuring sensors mounted at high-voltage transmission lines. The supply source transformer transfers the generator to a saturation mode, in which its output voltage does not change practically when current passing through wires of the transmission line changes in a wide range. |
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Solenoid coil comprises an excitation winding and an external magnet core consisting of a cylindrical shell and two end flanges, which inner surfaces are magnet poles. The excitation coil consists of the main winding with a rectangular cross-section and two compensating windings of a V-shaped cross-section, which are wound around peripheral parts of the main winding with the rectangular cross-section. The main winding with the rectangular cross-section is wound on top of a cylindrical water-cooling jacket of a non-magnet material. The space between the main winding, two compensating windings of the V-shaped cross-section and the cylindrical shell of the external magnet core forms a gas-cooling jacket. The end flanges have a shape of cones protruding outside, where coaxial cone cutouts with peaks at pole surfaces are made. The angles at the base of the cones ensure equal density of a magnetic flux along the whole length of the magnet lines in the external magnet core. |
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Invention is related to electric engineering and may be used in frequency filters for wireless devices for various applications, for example, in harmonic filters of powerful high-frequency radio transmitters. A winding contains N wires connected in parallel and mounted on a circular frame. Each wire is placed partially to the inwards protruding part of the frame with holes for wires, which are placed in a circumferential direction of the protruding parts with gaps in-between the holes. Each wire is placed partially in the holes spaced from each other at a distance of the total gap between them, including at least N-1 diameters of the holes and N gaps between the adjacent holes. Wires of the winding may have a current-conductive coating, for example, a silver one. |
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Twelve-phase transformer-coupled phase converter Invention is related to converter equipment and may be used for manufacturing of rectifiers for direct and alternating-current electric controlled drives in order to improve their operational speed. Twelve-phase transformer-coupled phase converter consists of a three-phase converter having three wye- (or delta-) connected coils of the primary winding coupled to the three-phase network with zero wire, six interconnected coils of the secondary windings with taps from turns. Each coil of the secondary winding of the transformer is a side of the hexagon circuit that converts a symmetric three-phase system of voltage into six-phase system of voltage. Each tap of the secondary winding coil turn is one of outputs of the symmetric twelve-phase voltage system of the converter. Voltage of the twelve-phase voltage system depends on a voltage value of the six-phase system and is related to it as per the following ratio: U12=U6Cos30°/Cos15°=0.897U6. |
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Method of producing thin-film polymer nanocomposites for superdense magnetic information recording Method of producing polymer nanocomposites in form of thin films for superdense information recording involves producing a precursor consisting of polyvinyl alcohol, water and a mixture of water-soluble salts of ferric and ferrous iron, followed by treatment with at least one water-soluble dialdehyde at pH 0-3 in the presence of an acid as an acidifying agent, obtaining a thin film on a dielectric nonmagnetic substrate depositing the precursor on a substrate rotating on a centrifuge to form a gel film, treating the obtained gel film with an alkali, the alkali being added in an amount allows complete alkaline hydrolysis of the mixture of iron salts to form a mixture of magnetite or maghemite. The obtained gel film is treated with the alkali in ammonia vapour which is formed from aqueous ammonia solution (NH4OH) or hydrazine hydrate (N2H4·H2O) for 5.0-15.0 hours. |
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Production of texture sheets from electrical steel In compliance with this invention, slab contain the following components in wt %: 0.01-0.10 C, 2.5-4.5 Si, 0.02-0.12 Mn, 0.005-0.10 Al, 0.004-0.015 N, 0.005-0.06 S and/or 0.005-0.06 S. Steel sheet temperature is controlled to satisfy the equation T(t)<FDT-(FDT-700)×t/6 (where T(t) is steel sheet temperature (°C), FDT is finishing temperature of rolling (°C) and t is time interval (s) after termination of finish rolling) over the entire roll length at cooling after finish hot rolling. Besides, temperature of steel sheet roll end section making 10% of roll length is controlled to make at least 650°C in 3 seconds after termination of hot rolling. |
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Tattoo machine frame consists of a side wall made of one piece and an S-shaped fin. The side wall is adjacent to the S-shaped fin for at least 70% of its length. The S-shaped fin is made with a boss. The boss is made with a hollow groove. The clamp is made in the form of a flat bolt pin with an opening and a threaded stud and is mounted in the closed groove of the boss of the S-shaped fin with the ability to move in a direction perpendicular to the side wall. The threaded stud passes through the opening of the frame. The nut is mounted on a threaded stud at the side wall can have a thumbscrew shape. The frame can be made of aluminium alloy. |
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Pressure compensator for underwater device Pressure compensator is fitted by at least one external bellows and the first chamber limited by the external bellows. The compensator additionally comprises at least one internal bellows set inside the first chamber and the second chamber limited by the internal bellows. Limited compensation volume communicating with the underwater device volume is present between the external bellows and the internal bellows. |
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Method of producing polyethylsiloxane-based ferromagnetic liquid Disclosed is a method of producing a polyethylsiloxane-based ferromagnetic liquid, which involves precipitation of fine magnetite particles from aqueous solutions of ferrous and ferric salts with ammonia solution, stabilisation thereof with sebacic acid and peptisation in a mixed solvent which contains liquid polyethylsiloxane, a low-boiling hydrocarbon solvent and a fraction of alkyl derivatives of benzene or propylene oligomers which boil in the range of 250-400°C, in amount of 5-95% of the content of liquid polyethylsiloxane in the mixed solvent. The stabiliser is pre-dissolved in the low-boiling solvent, the low-boiling solvent used being ethanol and the liquid polyethylsiloxane used having a linear structure of general formula M2Dn, where n=1-8, M - (C2H5)3SiO0.5, D - (C2H5)2SiO, with number-average molecular weight of 1600-1750 g, density at 20°C of 0.99-1.00 g/cm3, viscosity at 20°C of 200-500 cS, thermal-oxidative breakdown temperature of 360°C. Stabilisation of the fine magnetite particles and peptisation thereof in a mixed solvent are carried out simultaneously while mixing and at a temperature of 80°C for 24 hours under a vacuum. |
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Tap charger with semiconductor switching elements Invention is related to an on-load tap charger with semiconductor switching elements for uninterrupted switching between fixed contacts of the tap charger which are connected electrically to the tapped winding of the tapped transformer. Each of the fixed contacts of the tap charger can be connected to the device for charging either directly or through interconnected semiconductor switching elements. According to the invention the tap charger has separated and fixed tapping contacts for electric insulation of the semiconductor switching elements from the transformer winding during the static mode of operation. |
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Automatic magnetic field controller for underwater or surface object Invention relates to ship-borne means for magnetic protection of an underwater or surface object, particularly automatic controllers of the magnetic field thereof. The automatic magnetic field controller for an underwater or surface object includes a unit for receiving signals from magnetic field sensors of said object, from a navigation system and signals on current of compensators of the magnetic field of the object, a unit for generating an algorithm for controlling the system for automatic control of the magnetic field of the object, units for controlling compensators of the magnetic field of the object and a unit for distributing signals for controlling efficiency of the compensators of the magnetic field of the object. The controller includes a unit for monitoring the magnetic state of the object, which is connected to the output of the unit for generating a control algorithm, and a unit for signalling overshooting of maximum values of magnetic protection parameters thereof, which is connected to the output of the unit for monitoring the magnetic state of the object. |
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Electric equipment, containing dielectric oil with erucic acid Claimed invention relates to composition, suitable for application in electric equipment, containing dielectric liquid. Claimed dielectric composition includes oil component, with oil component containing crambe oil and/or rapeseed oil with high content of erucic acid, as well as etherified crambe oil and/or etherified rapeseed oil with high content of erucic acid, with oil component having content of erucic acid at least 45 wt %. Introduction of esters, claimed in accordance with claimed invention, makes it possible to reduce oil component viscosity. |
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Medium or low voltage transformer with step changing and its operating method Invention is related to electrical engineering and can be used in distributing mains in order to decrease voltage fluctuations. The transformer contains a stepping switch on the basis of one or several mechanical switches. At switching current is directed through semiconductor switches in order to ensure uninterrupted operation. |
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Measuring contact sequence in tap changer Tap changer for a transformer comprises a cylinder and a shaft which is rotatably arranged inside the cylinder. The cylinder is provided with fixed contacts and the shaft is provided with a contact circuit facing the cylinder and including mechanical contacts, wherein the mechanical contacts are adapted to selectively mate with the fixed contacts of the cylinder upon rotation of the shaft. The contact circuit also includes at least two measuring points for measuring the characteristics of the contact circuit. The tap changer comprises at least one measuring contact device, which is electrically connected to the respective measuring points in the contact circuit. The measuring contact device is placed inside the shaft. |
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Electromagnetic unit of electromagnetic valve Invention relates to electrical engineering and electromagnetic units, primarily for the electromagnetic drive of a fuel injector. The electromagnetic unit (2) has a housing component (20) with a coil (30) inserted therein. An armature (36) is placed on the first side (31) of the coil (30). A cover (21), which closes the housing component (20) and is joined with said component by a weld joint (22), is located on the second side (34) of the coil facing the first side (31) of the coil. |
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Invention relates to electrical engineering and ignition coils. A means (12) of generating a pre-pressing force with force closure is mounted to the frame (3) of the ignition coil and has a hole (15) in the area provided in an elastic air passage (11) compensator (10) or is in form of a protrusion on the frame (3) of the ignition coil. |
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Hard tape magnetic conductor for transformer and method of making same Invention relates to electrical engineering, magnetic conductors of electrical transformers, having a multilayer structure made of amorphous or nanocrystalline tape, and methods for production thereof. The hard tape magnetic conductor for a transformer is in form of a multilayer structure, each layer of which is formed from a predefined number of magnetic amorphous strips with an off-set gap in between, on the length of the magnetic conductor. The magnetic amorphous layer has a given geometric shape and has one lock-on connection formed by the beginning and the end of said layer. The lock-on connection is in form of a finger joint, e.g. dovetail. The method of making a hard tape magnetic conductor from an amorphous magnetic alloy involves cutting strips, treatment thereof with an adhesive compound and layering while offsetting the strips relative each other on the length of the magnetic conductor. The strips are cut by passing amorphous tape, for example through scissors, for example treated with a carbon-containing adhesive material and placed on an assembly table. A magnetic conductor with a winding is formed and the fold line and the lock-on connection are exposed to pulsed and/or high-speed heating. The amorphous magnetic strips are coated with a carbon-containing adhesive material by spraying in liquid form and/or superimposing an adhesive tape. |
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Invention relates to the field of electric engineering. Pipe (10, 30, 60) for laying outputs of high-voltage transformers contains a screening tube (12, 32, 62) of electroconductive material that passes the pathway, bended at least at certain sections of the pathway (14, 34), as a hollow cylinder in its axial direction. The electric insulating layer (16, 48, 49, 70, 78) in the form of a hollow cylinder is placed at the first radial distance (20) around the screening tube (12, 32, 62) along its axial length. The insulating layer (16, 48, 49, 70, 78) of stripped insulating material is wound around flexible planks (18, 36, 38, 40, 42, 44, 66, 68, 80, 100, 120), at least at their certain sections (82, 102, 122), and these planks are located along the pathway, bended at least at certain sections (14, 34), close to each other at the second radial distance (22) around the screening tube (12, 32, 62). |
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Method to produce highly permeable anisotropic electric steel Steel is smelted, poured to produce a slab, the slab is heated, rough and finishing rolling is carried out, then cooling, etching, double-stage cold rolling with intermediate decarbonising annealing, application of a magnesia coating onto a strip, high-temperature and straightening annealing is carried out, at the same time steel is smelted at the following ratio of components, wt %: C 0.018-0.035, Mn 0.10-0.40, Si 3.0-3.50, Al 0.010-0.035, N2 0.008-0.015, Cu 0.4-0.6, balance - iron and unavoidable admixtures, meeting the ratio between carbon and silicon so that the share of austenite during finishing hot rolling in the temperature range of 1150-1050°C makes 2-10%, prior to finishing hot rolling temperature of rolling is maintained in the range 1180-1280°C, and rolling is carried out with total extent of deformation 80-95% and with temperature of rolling end 970-1030°C, strips are cooled after rolling during the time not exceeding two seconds, and heating for high-temperature annealing in the range of temperatures 400-700°C is carried out with speed of 20-25°C/hour. |
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Method for protection of oil-filled transformer from explosion lies in introduction of SF6 gas to oil filling the transformer tank and pumping of the received mixture of oil and SF6 gas from the upper part of the transformer tank to the lower part through external pipeline at a speed equal or exceeding the speed of free ascent of SF6 gas bubbles diluted in oil. |
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Stationary electric induction device and method of its manufacture Invention is related to electric equipment, to stationary electric induction devices. The stationary electric induction device contains a porcelain tube, a connecting wire, a wire, a case, an off-take wire, a terminal, a gasket, an electric connecting element and the first and second insulating media. The connecting wire is located at one end of the porcelain tube. The wire is placed in the porcelain tube and connected to the connecting wire. The case covers the main unit of the stationary electric induction device and has an open part. The off-take wire passes through the main unit to the open part. The terminal is placed at the end of the off-take wire. The gasket isolates the other end of the porcelain tube and the open part. The element includes an electrode connected to the terminal and the connecting part is connected to the wire and passes through the gasket. The first and second insulating media fill the porcelain tube and case respectively. |
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Field emission method and system Invention relates to magnetic field emission systems used in devices which provide precision movement and positioning of objects containing electric or magnetic field sources. Values, polarity and position of magnetic or electric field sources are made such that they have the required correlation properties which may conform to a code. The correlation properties correspond to the required function of spatial forces, where spatial forces between field emission structures match correspond to relative alignment, a gap and a function of spatial forces. |
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Permanent magnet, method of its production, rotor and motor with internal permanent magnet (ipm) Permanent magnet production process comprises the steps that follow. a) Fabrication of permanent magnet (1). b) Cracking of permanent magnet (1) to get two or more separate parts (13). c) Recovery of permanent magnet (1) by jointing rupture surfaces of separate adjacent parts (13) together. |
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Method to produce textured transformer sheet from thin slab Invention relates to the field of metallurgy. To ensure high stable magnetic characteristics of a textured transformer sheet a steel slab with thickness of <100 mm with Si content of 2.5-3.5 wt % is exposed to thermomechanical action made of the following operations: non-obligatory first heating to temperature T1 of not more than 1250°C, first rough hot rolling to temperature T2 in the range 900-1200°C, at the same time the extent of compression (% Rid) during rolling is regulated so that it makes at least 80% with absence of the following heating to temperature T3 or it makes at least 60%, and it is determined from the following ratio %Rid = 80 − (T3 − T2) 5 , with availability of the following heating to temperature T3 below 1300°C, non-obligatory second heating to temperature T3>T2, the second final finishing hot rolling to temperature T4<T3 to thickness of rolled stock of 1.5-3.0 mm, cold rolling in one or several stages with non-obligatory intermediate annealing, in which at the last stage the extent of compression makes at least 60%, the first recrystallisation annealing, not necessarily in the decarbonising atmosphere, secondary recrystallising annealing. |
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Device for inductance cell cooling Invention is referred to electric engineering, inductance cells used in general and special-purpose electrical equipment, in particular, in alternating voltage converters and electronic ballasts. |
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Invention is referred to electric engineering and can be used for manufacture of tape magnetic circuits for distributing transformer of tapes made of amorphous nanocrystalline metals and alloys. The device for formation of closed tape magnetic circuit of stacks of multilayer amorphous metal tapes contains a releasable bend former and a locking mechanism for stacks in the bend former. The bend former consists of the left and right side posts, the upper and lower planks as well as a boss with grooves in which the above movable side posts are installed so that they can move in horizontal direction. The upper and lower planks are installed from above and below of the side posts respectively so that they can move in vertical direction. The locking mechanism for stacks is made as two brackets - an outer bracket and an inner one, and shape of each bracket corresponds to the inner and outer surface of the magnetic circuit; the inner bracket is installed at the bend former. |
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Invention is referred to electric engineering and can be used for supplemental reactivity of an arc furnace transformer. Reactive ballast arrangement (V) for the arc furnace consists of a choke coil (1) with an open switch (2) for load increment changing which is suitable for installation of the choke coil (1) reactance under load. Reactive ballast arrangement (V) is connected before the transformer of the arc furnace (O) used, in particular, for steel making. |
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Reliable system for transmitting data over wire conduit Invention relates to high-frequency data and/or power transmission systems which are suitable for borehole use, and includes connecting sleeves for signals/power, sections of a transmission line and transponders. Signals and power are transmitted between connecting sleeves and/or between connecting sleeves and transponders by electromagnetic resonance coupling. In at least part of the system, transmission line sections form parallel data transmission channels and transponders allow switching between data/power transmission channels, thereby considerably improving reliability. The invention also includes a method of transmitting data and/or distributing high-frequency power through a borehole transmission system, which includes a plurality of data/power transmission channels and a plurality of intersections, in which defective points in one data/power transmission channel are bypassed by routing data and/or power to parallel data/power transmission channels via electromagnetic resonance coupling. |
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Evaporative-condensing cooling system for current-conducting elements (versions) Invention relates to the field of electric engineering. The system consists of an evaporator, a condenser, a condenser cooling unit, pipelines connecting the condenser and the evaporator. The evaporator is made so that it has permanent and tight contact with the cooled surface of current-conducting element. Level of cooling liquid in the evaporator is located above the upper border of the current-conducting element. Input of the pipeline connecting the evaporator and the condenser is located above the cooling liquid level in the evaporator. The condenser is located higher than the evaporator and consists of at least two connected containers capable to condense gaseous coolant generated in result of the cooling liquid heating and evaporating in the second container which is connected to the evaporator by the pipeline. |
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Method of demagnetising of rail block joint and device to this end Invention relates to railway transport, particularly, to demagnetising of rail block joint. In compliance with this method block joint is subjected to magnetic field effects excited by inductor with its winding connected to capacitor unit. Indicator winding is connected to capacitor unit via set of switches controlled by Hall sensor to make magnetic pulse excited by said winding at discharge of capacitors feature magnetic induction vector directed opposite that created by block joint magnetic field. Capacitor unit is charged from piezoelectric generator. Note here that to deform the generator piezoelectric element mechanical vibrations of the rails caused by rolling stock are used. Capacitor unit is discharged to inductor winding by power hate when rated voltage of said unit is reached under control of threshold element. Invention relates also to device that implements said method. |
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Powdered ferromagnetic composition and method for production thereof Invention relates to powder metallurgy, particularly to production of a ferromagnetic powered composition. The composition can be used as a core in inductance coils, stators and rotors of electrical machines, drives, sensors and transformer cores. The composition contains a lubricant in form of solid particles and magnetically soft basic particles based on iron, the surface of which is coated with a first inorganic insulating layer based on phosphorus and at least one organometallic layer outside the first layer. The organometallic compound has the following general formula: R1[(R1)×(R2)y(MOn-1)]nR1, where M is a central atom selected from Si, Ti, Al or Zr; O is oxygen; R1 is a hydrolysable group; R2 is an organic part in which at least one R2 contains at least one amino group; n is the number of repeating structural units ranging from 1 to 20; x is an integer from 0 to 1; y is an integer from 1 to 2. The organometallic layer is strongly bound to a metal or semi-metal compound in form of solid particles, having Mohs hardness of less than 3.5. |
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Multi-decade inductive voltage divider Invention belongs to area of electric equipment. The multi-decade inductive voltage divider a toroidal ferromagnetic core, decades, each of which is executed in the form of a dividing winding and consists of K+1 sections, where K is the factor of decade division, having identical quantity of turns. Each section is executed as a cord consisting of two evenly braided isolated wires, which form separate windings that have been connected as matching and in series. Binary dividers are connected in series and in parallel. Middle branches of the first and the last form of binary dividers form the input of the dividing winding. The entrance of a dividing winding of the last decade is connected with a source of an input signal. The input of a dividing winding of the next decade is connected with a set of branches of the last decade means of the device of switching according to Kelvin-Varley scheme. Decades are placed on the general ferromagnetic core in layers, each layer forms sections in sectors of the core, decades are reeled up in a common cord created from eleven pairs of evenly braided isolated wires. |
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Method of magnet core treatment Invention is related to electric engineering and purposed for manufacturing of magnet cores for power transformers of secondary supply sources, measurement transformers and current transformers. Method lies in treatment of stranded magnet core of amorphous alloy strip based on cobalt at Curie temperature up to 170°C, which turn-to-turn space is filled by nonorganic glue based on sodium silicate in order to make a rigid structure; the method includes annealing in oxidising environment with further cooling up to room temperature. Magnet core is subject to additional annealing in oxidising environment in the mode of magnet core treatment by heating up to temperature of 100-140°C with the rate of 5-15°C/min in permanent magnet field oriented orthogonally to end plane of strip turns. Isothermal treatment is carried out within 10-20 minutes, then cooling is made up to room temperature in magnet field with the rate of 3-10°C/min. Field intensity is maintained as value of 50-80 kA/m. |
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Apparatus for detachable attachment of conductor to transformer housing Apparatus for detachable attachment of a conductor (10) to the housing (12) of a transformer includes fastening element (16) which passes through a fixing element (14) made in the housing (12) of the transformer, and at least partially rests on the surface of the conductor (10) when the conductor (10) is attached to the housing (12) of the transformer. When the conductor (10) switches from a unfastened position to a fastened position on the housing (12) of the transformer, the fastening element (16) advances inside the fixing element (14) along its longitudinal axis (54) towards the conductor (10), and then turns about the longitudinal axis (54). |
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Proposed coining composition contains the following substances, in wt %: cobalt - 34.5-35.5, nickel - 14.0-14.5, copper - 3.8-4.2, aluminium - 7.0-7.5, titanium - 5.0-5.5, sulfur - 0.15-0.,25, tin - 0.1-0.2, hafnium - 1.0-2.0, iron making the rest. |
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Alloy composition, fe-based nanocrystalline alloy and method of its making and magnetic assy Invention covers the alloys FeaBbSicPxCyCuz, where 79≤a≤86 at.%, 5≤b≤13 at.%, 0<c≤8 at.%, 1≤x≤8 at.%, 0≤y≤5 at.%, 0.4≤z≤1,4 at.% and 0.08≤z/x≤0.8, and FeaBbSiePxCyCu, where 81≤a≤86 at.%, 6≤b≤10 at.%, 2≤c≤8 at.%, 2≤x≤5 at.%, 0≤y≤4 at.%, 0.4≤z≤1.4 at.% and 0.08≤z/x≤0.8. Proposed method comprises producing the alloy to be heat treated under condition that temperature rise rate makes 100°C or more per minute and that process temperature is not lower than that the alloy crystallisation start. |
Another patent 2513517.