Toroidal design of laminated plates of the magnetic circuit with the electrical windings
(57) Abstract:Toroidal design of laminated plates of the magnetic circuit with the electrical windings. Use: transformers and electrical machines. The essence: a design in which the magnetic circuit and windings are made of laminated cross-section along the involute plates of constant thickness. Effect: improving technology and expanding the area of use. 1 C.p. f-crystals, 5 Il. The invention relates to electrical engineering and can be used in transformers and electrical machines.Known toroidal magnetic core with windings laminated on the involute cross-section.Lack of it is a lack of technology and the limited area of use.In the present invention solves the problem of the elimination of these drawbacks.This is achieved by the fact that in the toroidal design of laminated plates of the magnetic circuit with electrical windings, in which the blending of the magnetic cross-section made along the involute, winding also made toroidal and laminated on the involute to cross stiny, different functional purpose, for example, conductive, like, insulating, transmitting the mechanical force.In Fig. 1 presents examples of the use of the invention in the transformers of Fig. 2 and 3 the same, in homopolar machines; Fig. 4 and 5 are the same in the cars AC.Transformers (Fig. 1) have a body 1, a cover 2, the cooling system 3, electrical leads 4 and 5 (Fig. 1A, 1B). Toroidal design has an internal window that hosts the primary 6 and secondary winding 7 of the transformer (option 1 Fig. 1A). The shell 8 evolvence situada-rolled steel plates. Plates are separate ring or connected to the solenoid. In accordance with the principle of electromagnetic reversibility of the structure during its design in similar structures in toroidal window is the magnetic circuit 9, is wound in the form of a ring of tape electrical steel (option 2 of Fig. 6A). The shell 8 when this evolvence situada the copper plates connected in open-loop (in special cases closed) solenoid, the ends and intermediate the findings of which are internally connected to pins 4 and 5 of the transformer.According the Informator can be not only electric, but magnetic.Schematic diagram of such a transformer is shown in Fig. 1B, the design in Fig. 1B.At the same time, internal toroidal box transformer is u-shaped conductor of electric current 10 and constituting one body with him 5. conclusions The shell 8 has a design option 1 and Fig. 1A with the difference that shihtovochnye plate connected to the solenoid and that part shihtovochnye plates beyond the dimension of the toroidal structure, acting as a core of the primary winding 10A (Fig. 1B).In Fig. 1G shows the structure of a rotating three-phase transformer with a cylindrical air gap " that separates the toroidal design of the magnetic circuit with the electrical windings into two parts, one of which is fixed in the housing of the electric machine rotation, the other on the shaft. Both parts have involute blending of the magnetic circuit, both parts have a primary electrical winding in the fixed part, secondary to the mobile. The design can be used in the circuit of the exciter contactless synchronous machines with rotating rectifier.Motors and generators (Fig. 2-5) have a body or body-frame 11, a cover 12, a bearing 13, and the cooling system, which in Fig. 2-5 are not shown.Toroidal design separated by air gaps (cylindrical, disk or their combination) on the rotor and stator parts with the corresponding fastening (for example, through the spline connection) on the shaft 14 and the housing 11.In areas of electric current and magnetic flux toroidal design has involute blending of the magnetic core and electrical windings, in areas of alternating directions of the magnetic flux involute blending of the magnetic circuit, the permanent plots of the direction of the magnetic flux of the magnetic core is made of solid metal.In Fig. 2 examples of design unipolar (once-through) DC machine with radial (involute) (Fig. 2A) and axial (Fig. 2B) directions of the operating current.The design has two internal toroidal window, where the electric winding of the magnetic flux.The design feature is involute mixed rotor and proportions radial dimensions.In Fig. 3A shows an example of unipolar machines single-phase alternating current.All sections of the magnetic circuit have evolvere D and internal D1additionally laminated conductive layers (sheet copper or copper coated steel plates), which form the winding operating current of the electric machine.In the inner boxes of the magnetic circuit in its stator part has two electric winding of the magnetic flux.Operating current is supplied to the rotary part of the magnetic circuit through sliding contacts from an external source (option 1, Fig. 3A) or through field winding and the transformer T, embedded inside the magnetic core of the electric machine (option 2 of Fig. 3A).In the latter case, the stator part of the magnetic circuit is made up of several sections and each section has its own secondary winding, through which the moving contact is closed on the winding operating current of the rotor.Both can be used in one electric machine and the different modes of operation, for example, at start-up and rated load.In Fig. 3b shows an example of an electric machine with a multi-way movement of the operating current, which is used in all major types of modern electrical machines AC / DC.In the design of power if the ribbon electrical steel. The lines of force of the electric current are radial (involute) direction.Toroidal design of the magnetic circuit has three components of the same type design, the split disk air gap. The extreme part fixed in the housing and belong to the stator, the middle part is mounted on the shaft and belongs to the stator, the middle part is mounted on the shaft and belongs to the rotor.All parts of the toroidal designs have an internal switching. As one of the examples in Fig. 4 shows the wave winding composed of conductive layers shihtovochnye plates and C-shaped conductors located in each of the four corner slots of each component of the magnetic circuit with a step for each angular groove in four shihtovochnye plate and the distance between the shelves of a C-shaped conductor in three shihtovochnye plate (4A). Shelves are placed in the Windows Explorer.In Fig. 4B Dana schematic diagram of the electrical connections when the machine is in operation on three-phase current. The number of plates used in the scheme, a multiple of 12. In Fig. 4B used 24 plates. The direction of current in each phase taken for time t t1where IWhen this rotary part of the toroidal structure can be enclosed within the compounds A-X, B-Y, C-Z (squirrel cage rotor) or have the appropriate outputs on the sliding contacts 16 (Fig. 3), as is the case in induction motors with phase rotor.To work in the synchronous machine in the rotor part toroidal design of the internal switching must be supplemented links X-Y, B-Z, the ends a and C display the contact ring and apply through them DC.For operation of the electric machine in the mode of a DC motor can be used toroidal design with internal switching electrical windings, as for synchronous machines, but with the additional use of known solutions of controlled semiconductor switches brushless motors.However, if you use sequential switching of phases a, b and C at a constant current by using a multiphase inverter, the technical capabilities of the electric machine with the proposed toroidal design will nedoispolzovannoe.In Fig. 4B shows the internal circuit switching is th N 20 (Fig. 4G).From the diagram according to Fig. 4B should be pretty obvious that if at time t t1external constant current source connected with the C-shaped conductors connecting the conductive layers of the 1-St and 4-th plate (-), and 5-th and 8-th plate (+), 1, 2, 3 and 4, the plate current will have the same direction, and 5, 6, 7, 8 plates opposite. In the next moment, it is possible to modify the schema of the external connections by one of two options:
to an external source (+) to connect the S-shaped conductor connecting conductive layers 2-nd and 5-th plates and 6-th and 1-th plate (-). Will turn the magnetic field on one plate. However, this scheme of alternation external connections requires the use of C-shaped conductors arranged on different diameters;
the second option provides the rotation of the magnetic field with its discrete offset by two shihtovochnye plate, when in the moment of time t2to an external source connected:
to "-" 3-5 plates,
to "+" 7-2 plate
next to the "-" 5-8,
to "+" 1-5 etc.With each cycle of the switching circuit provides a discrete rotation of the magnetic field by 90 electrical degrees.This management scheme required the SS="ptx2">In Fig. 4D to create the rotating magnetic field shows a diagram using 20 shihtovochnye plates with conductive layers.C-shaped conductors 1-4, 3-6, 5-8 plates of the stator windings through the thyristors 17, 18, 19 are connected to "-" the external network, and 11-14, 13-16, 15-18 through the thyristors 20, 21, 22). At the time of start, time t1and in moments of t4, t7, t10open the thyristors 17 and 18. At time t2and in moments of t5, t8, t11, control signals, for example, from additional microprocessor control unit (Fig. 9g not shown) thyristors 17 and 20 are closed at the same time open the thyristors 18 and 21. Similarly, at time t3and in moments of t6, t9close the thyristors 18 and 21 and simultaneously open the thyristors 19 and 22.This C-shaped conductors of the rotor winding 2-5 and 12-15 via the contact ring 16 is connected to a constant power source.The considered control scheme provides a speed determined by the control unit, and can be used as a trigger. After dialing the desired engine speed thyristor control unit with microprocessor from work off and on>/P>In Fig. 5 examples of non-traditional types of electrical machines of the rotation.In Fig. 5A electric machine according to the scheme of work is different from the traditional frame with an electric current in a magnetic field so that the frame is leaking magnetic flux, and power lines that it crosses represent the lines of force of the electric current. Toroidal design consists of two rotary parts 25 and 26. Part 25 of laminated steel plates and copper strips. Part 26 of laminated steel sheets. The outer sleeve 27 part 25 is a collector containing at least three plates.In Fig. 5B shows an electric machine three-phase AC. A distinctive feature of the machine consists in placing the phase windings in the three inner boxes toroidal design. In Fig. 5B they performed at the rotary part of the magnetic circuit that is not required. The outer sleeve 28 of the rotary part is made of soft-magnetic material and the outer part are subzone ledges. The step of teeth on each of the outer sleeve 28 is constant and is equal to S. In relation to each other, the teeth of the outer bushing 28 is shifted by the value "1/4 S". While the conductors of the stator h is the gap which replaced the rolling elements 28 of conductive material (for example, bronze). Electric winding of the magnetic flux and electric current are combined in the windings 29. Electric current is also carried on the shaft 31. To the external network of the winding are connected through the conclusions 32 and 33. To enhance the effect of the operation of the electrical machine according to Fig. 5V electrical winding 30 can run multiple, bearing rings made of composite materials with a low ohmic resistance in the radial direction and a large flow resistance around the circumference of the shaft 31 is additionally laminated conductive layers, a number of conclusions 32 and 33 is increased and each other with respect to an external electrical network, they have a serial connection. 1. Toroidal design of laminated plates of the magnetic circuit with electrical windings, in which the blending of the magnetic cross-section made along the involute, characterized in that the winding is also made toroidal and laminated on the involute cross-section of the plates of constant thickness.2. Design by p. 1, characterized in that it is made of layers of plates, different functional purpose, such as conductive, like, insulated, front
FIELD: electrical and power engineering; high power flow transmission and distribution.
SUBSTANCE: proposed current transformer has grounded housing accommodating winding-and-core assembly incorporating magnetic core carrying secondary windings disposed around one of primary winding conductors and secured on grounded housing. Two high-voltage bushing conductors are coaxially disposed. Primary winding conductors are coaxially arranged within grounded housing and interconnected by means of conducting disk. Magnetic cores and secondary windings are disposed around internal primary winding conductor and secured to grounded housing. Vibration dampers made of insulating material are installed in high-voltage bushing between coaxial conductors.
EFFECT: enhanced reliability and dynamic resistance to short-circuit currents.
1 cl, 1 dwg
FIELD: electro-mechanical equipment engineering, in particular, engineering and production of electromagnetic-acoustic transformers.
SUBSTANCE: during determining of primary constructive and electric parameters, shape of inductive coil is taken into consideration.
EFFECT: increased quality of inductive coil for electromagnetic-acoustic transformer.
FIELD: electrical engineering; converters and acoustic apparatuses incorporating low-power transformers.
SUBSTANCE: proposed low-power transformer has shell-type magnetic circuit assembled of similar rectangular-window ribbon cores coupled at intermediate leg. It carries impregnated insulated windings which are wound directly on intermediate leg and form monolithic structure upon impregnation together with shell-type magnetic circuit. Width-to-thickness ratio of intermediate leg a/b is kept within the range of 1 < b/a ≤ 4. Definite design alternates of structural components are proposed for this transformer.
EFFECT: improved specific power and noise characteristics.
4 cl, 1 dwg
SUBSTANCE: in inductor which is of cylindricity and contains winds, reeled by km parallel wires (where k, m - integer, k≥1, m≥1), sources of which are located at one end of its face, and finish - on the other end. Parallel wires are divided into m parallel groups, every of which contains m tandem parts, reeled to by parallel wires and located at m floors and m concenters, one of which is inside, and other - outside. Parts, forming different groups, are interchanged in axial and radial direction. Each group of parallel wires is located on every floor and all concenters, at that m - quantity of groups, concenters, floors in inductor and parts in every of group, m - integer ≥ 2; k - quantity of parallel wires in group, k - integer ≥1. According to the second independent claim, it is introduced method of inductor manufacturing.
EFFECT: expansion of features by means of usage at high heavy current.
4 cl, 2 dwg
FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering, particularly to differential current transformers incorporated with protective circuit breakers. Built-up housing (20) for magnetic device (1) to accommodate differential transformer circular magnetic core (2) made from insulating material. Housing (20) has at least two conducting terminals (5) to connect ends (6) of at least one conducting loop (6) of, for example differential current transformer secondary and/or tertiary (4). Conducting terminals (5) represent leadouts (8) of at least one plug-in electronic component (9).
EFFECT: facilitated automatic production of protection circuit breakers.
23 cl, 9 dwg
FIELD: electric engineering.
SUBSTANCE: three-phase transformer comprises frame with at least three rods of magnetic conductor, on which there are high and low voltage windings arranged concentrically, and electroconductive elements. High voltage winding comprises at least one part in height and is connected into star having neutral. Its every phase has two ends, in which the first end is linear, and the second one is connected to neutral. High voltage winding is located as nearest to rod of magnetic conductor and is arranged at least with one layer. Linear end of high voltage winding is installed in at least one horizontal channel arranged in low voltage winding. Neutral is connected to magnetic conductor by means of at least one electroconductive element. Magnetic conductor rests on support insulators, lower support metal parts of which are grounded. Jacket is made of metal and is connected to magnetic conductor by means of at least one electroconductive element.
EFFECT: reduced level of main and interphase insulation, reduced consumption of materials, minimisation of short circuit losses and idle run.
4 cl, 4 dwg
FIELD: electrical engineering.
SUBSTANCE: three-phase current-limiting motor smoother starter comprises face and side structural elements that form housing. Phase windings are arranged vertically with spacers between wire rows to form vent channels. Bearing elements comprise plates and cross pieces with dampers arranged between insulation face elements and phase windings. Tightening elements represent plates with studs. Every isolating cylinder accommodates multi-face phase winding locked in face zones by tightening elements via dampers. Four-beam bearing and face elements are connected crosswise and locked between lateral structural elements. Phase winding wire cross section is selected subject to tolerable wire heating on starting the motor. Distance between phase windings is selected subject to mutual inductance required to ensure reactor inductance that allows providing necessary insulation for corresponding voltage class.
EFFECT: lower labor input and reduced consumption of major materials, higher reliability and reparability.
8 cl, 2 dwg
SUBSTANCE: method of transformer winding preparation for pressing includes fabrication of upper pressing plate by reeling metal band onto template after reeling transformer winding on one reeling machine, then joining turns of upper pressing plate, then removal of template with transformer winding and upper pressing plate from the machine and transferring them for tipping to carry out winding bracing and further processing.
EFFECT: reducing consumption of material for pressing plates fabrication and increasing productivity of labor by using horizontal reeling machine.
SUBSTANCE: coil unit for electromagnetic acoustic transducers has a group of inductance coils lying one below the other with overlapping and are independently connected to their own receiver, wherein the group of coils has an arbitrarily large total length of the working zone, and coils in a group lie in several layers in a linear direction, a curvilinear direction or on a circle depending on the purpose of ultrasonic inspection, the shape and direction of movement of the inspected object, wherein the unit is provided with a second group of inductance coils connected to their own generators, lying above the first group of coils with complete or partial overlapping of coils of the first group; coils of the second group are placed with bias from each other in the direction of the transverse axis, wherein coils of both groups have a different number of windings, different width of working zone and different geometric configuration on the plane, and the length of the working zone L of coils of the first group is selected from the condition L=(N×Z)-(N-1)×C, where Z is the length of the working zone a coil, N is the number of coils, C is the overlap value for each neighbouring coils.
EFFECT: providing electromagnetically independent operation of coils on different modes from different generators, different receivers and generation of a uniform acoustic field on the entire width of the unit in a wide range of thickness of the inspected articles.
5 cl, 8 dwg
SUBSTANCE: retaining device for a transformer winding with cast insulation comprises a support element and a receiving element installed on a coupling bolt. Due to fixation of the support element on the receiving element installed on the coupling bolt, the transformer winding may be fixed motionlessly and with accurate alignment relative to the transformer core. Due to installation of the receiving element directly on the coupling bolt, air circulation is provided in the lower zone of the transformer winding with cast insulation, accordingly, of an insulating cylinder installed on the support element, and thus thermal properties are improved. Besides, due to the possibility of connection of the receiving element on the coupling bolt with the support element the modular and thus simple design of the transformer with cast insulation is achieved.
EFFECT: simplified assembly without impact at air circulation between an inner side of a winding and a transformer core.
5 cl, 5 dwg
FIELD: electrical and electromechanical engineering; rotors of large electrical machines such as turboalternators.
SUBSTANCE: proposed electrical machine rotor has heavy wound core whose winding coils are secured in end portions in radial direction by means of heavy metal banding rings fitted with one end on butt-end portions of core and with other end, on cylindrical surfaces of Z-section alignment rings; inner surface of alignment rings are joined with end portions of rotor shaft, two rows of slits being made in vicinity of mentioned rotor-shaft or banding-rind junction surfaces of each alignment ring uniformly and tangentially disposed over circumference of the latter in relatively staggered manner. One row of mentioned slits can be made in mentioned zones within alignment ring and other row, on rotor shaft surface jointed to alignment ring, for instance in the form of cooling ducts.
EFFECT: enhanced reliability due to additional reduction of alternate stress in zone where banding rings are fitted on rotor core.
1 cl, 2 dwg
FIELD: electric engineering and electro-mechanical industry, in particular, features of design of coils with salient poles for rectangular stators of salient-pole electric machine.
SUBSTANCE: in the coil for magnetic system of stator of salient-pole electric machine with rectangular poles, made by winding of flat rectangular cross-section bus onto narrow rib and containing elements of body and coil isolation with monolithic realization of working part of coil, in accordance to invention, on frontal parts of coil air gaps are provided between coils, expanding in wedge-like fashion in axial direction from the end of magnetic-duct of pole, in gaps between coils in longitudinal symmetry plane of coil distant inserts are installed made of solid isolating material with shape and dimensions, corresponding to gaps between coils in this plane, and with width substantially lesser than width of pole, connected by gluing to surfaces of adjacent coils, a packet of structural elements, consisting of frontal parts of coil rings and distant inserts between them, is fastened in longitudinal symmetry plane of the coil by bandage of non electro-conductive material, resistant to stretching, aforementioned inserts being of orthogonally symmetric H-like form with height of bar, equal to width of bus, and with common height, exceeding it by double bandage thickness, aforementioned bandage being positioned between shelves formed by aforementioned method. Due to such characteristic feature, all four sides of rectangular cross-section of each conductor within limits of frontal part of coil form surfaces, directly cooled by blowing air or liquid, correspondingly to scheme of theoretically full usage of external surface of conductors for their cooling.
EFFECT: increased efficiency of electric machine, increased density of current in windings, resulting in improved mass-dimensional characteristics of electric machine, decreased temperature of windings, and, thus, increased lifetime of isolation, allowing to use isolation of lesser heat resistance which is therefore cheaper or more technologically accessible.
8 cl, 10 dwg
FIELD: electro-mechanical engineering.
SUBSTANCE: bandage of electric machine anchor winding is made in form of continuous solid coiling, coil to coil, in a layer of isolated wire of magnetic or non-magnetic material at whole axial length of bandage section of winding, which does not have other means of radial attachment. The bandage contains even number of wire layers with a lock of beginning and end of coiling on one of end sides. Below each single or double layer of wire, an insert ribbon is positioned which envelopes the anchor surface being bandaged in one layer and which is made of non electro-conductive reinforced material containing axially oriented direct threads rigid to stretching. Aforementioned insert ribbon is provided with collar stops on external surfaces along end edges. Collar stops are longitudinally reinforced with wire or non-metallic filaments rigid to stretching. Axial distance between their internal stopping surfaces is equal to axial size of surface being bandaged.
EFFECT: simplified construction, ensured maximal technically possible reduction of losses to vortex currents, ensured stable reliability.
4 cl, 8 dwg
FIELD: engines and pumps.
SUBSTANCE: invention relates to perfection of borehole generators, particularly, to support and limitation of displacement of stator coils arranged in the engine housing. Borehole motor has tubular housing elongated in lengthwise direction, stator part arranged therein, stator coil winding looped back in the stator by end turn with tip. It comprises connector to connect at least one of coil windings and housing end abutting on stator part end to support the winding.
EFFECT: fastening of stator coils not coated with lacquer inside motor housing.
17 cl, 5 dwg
SUBSTANCE: invention is related to the stator of electrical machine and the method of its manufacturing. The stator for electrical machine comprises the core having a variety of pole horns and a variety of windings made of electroconductive material at pole horns. At least a part of windings is made of a wire having a pair of free ends, which may be connected electrically to the network power source. The stator comprises two or more electric contacts having a flexible section, which may be moved in direction towards the core and away; the above contacts are connected electrically to the respective contacts of the power source. At least one of electrical contacts is formed by two free ends of the corresponding different wires and has a twisted shaped made by ends twisting along the initial line of the ends passing, at that at the base of each twisted part there is a loop for each electrical contact. The loop forms a dampening element for the respective twisted section.
EFFECT: improved reliability of the electrical machine.
21 cl, 20 dwg
SUBSTANCE: invention is related to electric engineering and may be used at production of submersible borehole pumps, electric vehicles, in particular hybrid vehicles, and battery vehicles. Winding of double-pole three-phase electric machine is made with number of slots z=18, c pitch of y=1-10, with number of parallel branches a=1 and ratio of number of turns in even delta-connected coils to number of turns in odd wye-connected coils equal to √3. Winding includes six single- and double-layered two-section coils with ratio of turn number in single-layered sections to turn number in double-layered sections equal to 2:1. Coil beginnings of wye and delta phases with the same polarity are shifted per 2 slots (40 electrical degrees). The coils are laid in waggle way and their outputs are placed from outer sides of coils or outputs of only even coils are placed from their inner sides. According to another version outputs of coil beginnings of wye and delta phases are placed in the common slot (shift is equal to 0 electrical degrees, at that at inner sides of the coils there are outputs of odd coils only or outputs of all coils.
EFFECT: implementation of double-pole three-phase energy-efficient and low-noise electric machine with number of slots of z=18, with pitch of y=1-10 and number of parallel branches of a=1.
2 cl, 4 dwg
SUBSTANCE: invention is related to electromotive machines, and more specifically to devices designed to support to insulate thermally superconducting coils of rotor. The device for support of superconducting coils at separating distance from the core of the machine rotor comprises an elongated circuit designed to serve as radial support for the coil, axial main assembly (84) made with potential fixing of the above circuit in regard to the rotor core at near end of the elongated circuit in regard to the rotor axis and bracket assembly designed to set inner depth for receipt of the superconducting coil section and to support elongated circuit at its remote end in regard to the rotor axis. The elongated material contains material resistant to heat flow. The axial main assembly comprises a modular assembly including the main module placed in cavity of the rotor core.
EFFECT: developing structure ensuring reliable support and heat insulation of the superconducting coil.
10 cl, 16 dwg