(57) Abstract:The invention relates to the field of cryogenic electrical engineering, in particular to the design of the superconducting winding of the electromagnetic device. The inventive superconducting coil includes primary and secondary multi-layer winding of the superconducting wire, the turns of which are spaced from each other at a distance of t=dowhere dabout- the diameter of the superconductor, with the first three layers of the winding are located from each other at distances equal respectively to two or three diameters of the superconducting conductor, and subsequent layers are located at a distance equal to the distance between the coils. 1 Il., table 1. The invention relates to the field of cryogenic electrical engineering, can be used in superconducting transformers, cryotron etc.Known superconducting multilayer winding of the power transformer containing cylindrical, concentrically arranged primary and secondary windings with a scattering channel between them and the ferromagnetic core rod type, located in the warm zone, at room temperature (Wilkinson K. J. R. "Superconductive Windings in power transformers". Proc. Jngt. Electrical Eng. 1963, v.110, N12, p. 2271 2279). Winding defects, because the scattering channel between the windings of the induction magnetic field scattering is generated total IMPELLITTERI primary and secondary windings and get high. Is also a strong edge effect, resulting in a strong distortion of the leakage field and the excessive increase in the current density at the edges of the cylindrical windings. All this leads to increased losses in the windings, reducing the current-carrying capacity and decrease the efficiency of the transformer.Also known construction of the superconducting winding of the power transformer. C. the USSR N1228708, BI N16, 1986), containing the primary and secondary coil windings are placed around the perimeter along the surface of the two coaxially arranged tubular insulating bobbins and wound spirally at a constant angle of inclination for forming the annular surface of each tubular insulating frame with one full rotation around its axis and spaced from each other along the perimeter surface of the frame by a distance t, which is determined from the relation t=dowhere d0the diameter of the superconducting conductor. This construction of the winding is single layer. Application in superconducting winding of the principle of the arrangement of coils of notary in it and thereby significantly increase the current carrying capacity and efficiency of the power transformer.However, this superconducting transformer has a limited capacity due to the fact that winding it made a single layer. The use of multilayer windings on the above principle would lead to increase in mass and size parameters of the transformer and cristaliana. Increase the cost of the refrigerant liquid nitrogen and liquid helium and energy associated with the process of liquefaction. These circumstances lead to the reduction of the overall efficiency of the system transformer system for cryogenic support.The proposed technical solution implementation superconducting multilayer winding reduces the distance between the layers of coils of superconducting windings, which leads to an increase in overall efficiency, reduces weight and dimensions of the windings of the cryostat, liquid helium and nitrogen and the energy is converted and functioning. At the same time this design can also increase the individual capacity of the superconducting winding due to the increased number of turns and the associated voltage.These technical results are achieved due to the fact that the superconducting winding of the electromagnetic device containing a primary and secondary winding and the diameter of the superconducting conductor, executed multi-layered, with the first three layers spaced from each other at distances equal respectively to two or three diameters of the superconducting conductor, and subsequent layers are located at a distance equal to the distance between the coils.The drawing shows a schematic cross section of a superconducting coil that implements the above-mentioned advantages.Superconducting coil 1, comprising primary and secondary windings of the superconducting conductor 2, contains three layers.By placing a superconducting current-carrying elements at a certain distance from each other equal to doas in known winding structure, minimizes the influence of magnetic fields of the conductors to each other and thereby significantly reduce the losses in the superconductor. But when running winding multilayer using this ratio between the two layers increases its size. The placement of the first three winding layers at distances equal respectively to two or three diameters of the superconductor, eliminates these disadvantages due to the fact that each turn of winding layers is a field of its own power, provided that:
< / BR>Hthe size of the magnetic field of one coil, created by the current of this round.The magnetic field of the winding is equal to:
where I is the current flowing through the coil;
Wtotalthe total number of coils in a superconducting winding;
b the length of the superconducting winding.The magnetic field of one coil is equal to:
< / BR>The total number of coils in a superconducting winding is:
< / BR>where W1the number of turns in each layer;
the number of layers in the winding.The number of turns in each layer is:
< / BR>t the distance between the centers of the cross-section of the coil conductor in each layer and is equal to t=do.Substituting the value of t, we get:
The number of layers in the winding is determined from the relation:
< / BR>a width of the winding section;
tathe distance between the layers, the layer step ta=Kad0,
where Kacoefficient taking into account the distance between the layers.Substituting the value of W1in equation (3), we get:
< / BR>where
< / BR>Substituting the values from equations (5) and (2) in our condition (1), we get:
The ratio of the number of layers of the superconducting winding (Waprovided that the layers are adjacent, i.e., between them there is no distance (except for the e value of Kadefined desired distance taKad0.The result is the distance values of tabetween the different layers, which are entered in the table.From the tables we see that when the number of layers of superconducting winding not exceeding the number "3" has the effect of placing layers at a distance equal respectively to two or three diameters of the superconducting conductor turns of the windings. Beginning with the fourth layer, this advantage is lost because the value of Kabecomes greater and therefore, it is advisable with this layer apply layout layers on the principle of "p."The use of the above arrangement of layers in a multilayer superconducting coil will expand the possibility of using superconducting electromagnetic devices and systems. The superconducting winding of the electromagnetic device containing the primary and secondary windings of superconducting wire coils which are located apart from each other at a distance of t = dowhere d0the diameter of the superconducting conductor, characterized in that the windings are made of layered, with the first three layers spaced from each other on restiani at a distance, equal to the distance between the coils.
FIELD: applied superconductivity.
SUBSTANCE: proposed method that can be used for manufacturing mechanically loaded superconductor windings designed for sustaining conductor stress higher than 100 MPa as well as superconductor windings and devices designed for operation under variable conditions, such as superconducting magnets for charged particle accelerators and superconductor inductive energy storages involves use of liquid epoxy resin as filler doped with finely dispersed powder of rare-earth intermetallide, for instance HoCu2 (holmium-copper) or CeCu2 (cerium-copper). Filler concentration is chosen between 20 and 50% of liquid epoxy resin volume.
EFFECT: enhanced performance characteristics of superconductor windings under variable conditions.
4 cl, 2 dwg
FIELD: high-voltage charged particles accelerators.
SUBSTANCE: device has high-voltage rectifier transformer, including high-voltage transformer, consisting of magnetic duct, rods with primary winding of which are encased in electrostatic screens, sectioned secondary winding, rectifier elements, inserted between sections of secondary winding, accelerator pipe with charged particles source, safety screen, inside safety screen compensation coil is mounted with possible presence of axial component of magnetic field in counter-phase to field vector, moving charged particles beam from accelerator pipe axis. Correction method includes forming by high-voltage rectifier transformer of high-voltage accelerator potential, initiation of charged particles flow in charged particles source, acceleration of charged particles flow in sectioned accelerator pipe, forming of beam of charged particles, while additional magnetic field is formed using compensating coils, mounted on external surface of safety screen.
EFFECT: broader functional capabilities, higher reliability, simplified construction, higher efficiency.
2 cl, 8 dwg
FIELD: applied superconductivity.
SUBSTANCE: proposed composite superconductor that can be used to manufacture superconductors for superconducting windings suffering heavy mechanical loads (at operating pressure across conductor higher than 100 MPa) as well as for superconducting windings and devices operating under variable conditions, such as superconducting inductive energy storage devices, dipole and quadrupole magnets for charged particle accelerators, has superconducting material fibers, matrix of high-conductivity metal, such as copper and rare-earth intermetallide possessing high thermal capacity at low temperatures. Composite superconductor is provided with metal sheath accommodating rare-earth intermetallide; mentioned wires and conductor are welded together. Metal sheath can be made in the form of hollow cylindrical conductor or flat strip with hollow interlayer, their hollow spaces being designed to dispose rare-earth intermetallide. Composite superconductor is made in the form of a few multiple-fiber composite superconducting wires twisted around hollow cylindrical conductor accommodating rare-earth intermetallide. Composite superconductor can be made in the form of flattened single-lay strand of several multiple-fiber composite superconducting wires and several hollow cylindrical conductors of same diameter accommodating intermetallide which alternately vary within strand. Rectangular-section conductor is made of high-conductivity metal and has longitudinal groove.
EFFECT: enlarged functional capabilities.
7 cl, 8 dwg
FIELD: electrical engineering, superconducting electromagnets for their change-over to sustained current operation with the use of detachable current conductor.
SUBSTANCE: the device has a superconducting coil cooled in a vacuum container. The first current conductor is fixed inside the vacuum container. Its one end is connected to the superconducting coil, and the other has a contact section of the wire. The second current conductor passes through a through hole provided in the vacuum container with keeping of leak-proofness. Its one end is connected to the wire line leading to the outer source of exciting current, and its other end has a section of disconnection/connection, it is installed on the contact section of the wire for detachment. The device is made for change over to sustained current operation by means of the current fed from the outer source of exciting current, when the mentioned section of connection/disconnection is in contact with the wire contact section, and can maintain the sustained current operation after its disconnection from the wire contact section.
EFFECT: provided effective, precise and safe connection of the current conductor of the superconducting magnet.
14 cl, 8 dwg
FIELD: electric engineering.
SUBSTANCE: in accordance to method for changing amount of energy in magnetic system, current is measured in at least one pair of windings of magnetic coil, while changed in one coil is electric current of one direction of current density vector, and in another winding electric current of opposite direction of current density vector is measured. Device contains magnetic coil containing at least one magnet with winding. Magnetic system contains at least one more winding, while at least two windings are made with possible connection as one pair of windings and are made with possibility of joint powering by currents of opposite directions, while it is possible to inject energy into at least one pair of windings and to eject energy from at least one pair of windings.
EFFECT: increased efficiency of parameter changes in magnetic system.
2 cl, 14 dwg
SUBSTANCE: thermo stabilised superconductors are implemented in the shape of matrix from metal or alloy, containing fibers of superconducting material and combination of rare-earth metals with extremely high heat capacity at low temperatures. At that superconductor contains at least two metallic tubes of unconditioned cross-section filled by combination of rare-earth metals and distance between tubes is not less then two tube linear dimensions. Superconductor has external envelope made from metal with high conducting properties. Tubes with combination of rare-earth metals can be distributed either by section of conductor as in matrix or by envelope.
EFFECT: extension of superconductor capabilities by means of increasing of its heat-absorbing abilities.
SUBSTANCE: proposed saddle shaped coil winding (3) is made from a flat shape of a race track type coil on a pipe-like lateral surface (Mf) such that, it contains winding sections (3a) axially passing on the lateral side and winding sections (3b, 3c), passing between them on frontal sides, which form end windings. Separate turns (Wi) of the coil winding must be made from at least one tape of a superconductor (5), particularly with superconducting material with high critical temperature Tc, whose narrow side (5a) faces the pipe-like lateral surface (Mf). To prevent inadmissible mechanical loads on the conductor when forming the winding, turns (Wi) in the saddle shape must have perimetre (U) respectively, which remains virtually unchanged compared to that in a flat coil.
EFFECT: efficient use of superconducting material from ready tape-like conductors with compact arrangement of windings; small diametre can be achieved of the area forming the pipe-like lateral surface.
23 cl, 10 dwg
SUBSTANCE: invention relates to electrical engineering, specifically to thermo-stabilised superconductors based on the Nb3Sn compound and methods of making the said superconductors. The thermo-stabilied superconductor based on the Nb3Sn compound is made in form of a matrix from a metal or alloy, containing superconducting material fibre, metal tubes filled with a rare-earth metal compound with extremely high heat capacity at low temperatures, an outer hollow copper cylinder and a thin cylindrical shell made from titanium and/or niobium placed coaxially between the matrix and the outer hollow copper cylinder. The metal tubes are tightly pressed to each other in the gap between the cylinder and the shell in the first version, or in a gap made in the radial direction in the wall of the cylinder in the second version. The method of making such thermo-stabilised superconductors is described.
EFFECT: wider functional capabilities of a thermally insulated superconductor due to presence in the superconductor of a rare-earth intermetallic compound with extremely high heat capacity at helium temperatures, which increases mean heat capacity of the superconductor by 5-6 times.
12 cl, 11 dwg
SUBSTANCE: electrotechnical current limitation device includes primary winding, secondary winding containing suppressed superconductor which is characterised by transition from condition with low resistance to condition with high resistance when electric current exceeds critical value. Secondary winding is connected to primary winding with common part of magnetic flow. In addition, secondary winding includes metal element (6) creating closed circuit, and cryostat (5) providing cooling of secondary winding. Besides it includes at least one element (3) arranged on considerable part of non-suppressed conductor characterised with minimum dependence of its resistance on current and magnetic field, and some part of suppressed superconductor. At least one loop of non-suppressed superconductor (3) and suppressed superconductor (2) are electrically connected in series, thus forming closed circuit.
EFFECT: reducing response time and providing the possibility of controlling it.
17 cl, 8 dwg
SUBSTANCE: device with superconducting coil includes the following: cylindrical container for coil, which has inner circumferential surface and outer circumferential surface. Superconducting coil is stored in cooled container for the coil so that superconducting element is wound on circumferential surface. Columnar magnetic body is attached to inner circumferential surface of container for coil.
EFFECT: sizes are decreased.
4 cl, 11 dwg