SUBSTANCE: inductor machine includes stator installed in magnetically soft housing (1) and made in the form of two laminated packs (2) and (3) from magnetically soft material with teeth (4) on their inner surface, working winding (5), the turns of which are located in slots between teeth (4) restricted as to height with backs (6) of those packs, two rotor packs (7) and (8), which are installed inside bores of stator packs (2) and (3), and excitation winding (9) installed between rotor packs (7) and (8). According to the invention, on outer surface of each stator pack (2) and (3) a provision is made for external teeth (10) oriented along the machine axis, the number of which is equal to the number of stator teeth on its inner surface, external teeth (10) are located above sections of backs (6) of each stator pack, sections of backs (6) under external teeth (10) are located between internal teeth of stator packs (2) and (3), and on inner side of housing (1) there are slots for arrangement of external teeth (10) of stator packs (2) and (3).
EFFECT: reduction of losses in housings of inductor machines and improvement of their efficiency, and reduction of time for transient processes.
2 cl, 4 dwg
The invention relates to the field of electrical engineering, and more particularly to a device of magneto electric machines, and can be used in General and especially in special machinery oriented manufacturer of electric machines for power supply systems and electric drive Autonomous objects.
Known structural performance induction machines (generators and motors), which are essential features of their device close to the object of the present invention (see, for example, is on page 41 in the book: Sugrobov A.M., Rusakova A.M. Design of electrical machines Autonomous objects. - M.: MPEI Publishing house, 2012). These machines have a stator in the form of two laminated packages, placed in steel smooth on the inner surface of the housing, so that their teeth are placed against each other, the working winding, the coils of which are located in the slots, limited by the height of the backs of packages two packages rotor installed inside the bores of the wound stator, and a fixed excitation winding. The teeth of the packages of the rotor in these machines are as the teeth of the wound stator, against each other, and the working winding is made in the form of single coils (fins), placed on each tooth wound stator.
The lack of induction machines with this device I have are significant losses in the copper business of the windings due to the relatively large total length of the conductors of their windshields parts, the number of which is twice the number of teeth of both packages stator. In addition, in the voltage curve of these machines contains all the harmonics that are present in the curves of change of magnetic conductivity of the length subcatego dividing the stator, which affects the waveform of the voltage generator and the electromagnetic torque ripple when operating these machines in motor mode.
A significant disadvantage of the known induction machines is also alternating magnetic flux in the steel casing on the backside of the wound stator and the presence of the variable component of the magnetic flux in the middle of the area enclosed between these packages. All this leads to the appearance in the array chassis eddy currents, resulting losses, decrease efficiency and increase the time transient.
Closest to the technical nature of the object of the invention is an induction machine, made by a constructive way is in the book: Sugrobov A.M., Rusakova A.M. Design of electrical machines Autonomous objects. - M.: MPEI Publishing house, 2012.
This induction machine has mounted in the housing of the stator in the form of two laminated packages of magnetic material with teeth on its inner surface, the working winding, the coils of which are located in grooves IU the control teeth, limited by the height of the backs of these packages, two sets of rotor installed inside the bores of the wound stator, and the field winding.
The inner surface of the vehicle body and associated external surfaces of packages stator (outer surfaces backs) made smooth.
Packages rotor mounted on the shaft so that their teeth are shifted relative to each other by half subcatego division. The working winding machines made in the form of single coils (fins), covering placed against each other, the teeth of both packages stator. Accommodation winding when shifted by half subcatego dividing the rotor teeth provides the minimum content of higher harmonics in the voltage curve in the generator and the minimum pulsation of the electromagnetic torque in motor mode of operation of the machine, allows to reduce losses in the winding due to the halving of the number of windshields parts and reduce their resistance. The excitation winding in this induction machine is located between packets of the rotor, which allows to reduce significantly the loss (due to the lower average length of a coil) and to facilitate the heat mode of operation of the machine.
A serious drawback of the machine prototype is that at high speeds and consequently a small number of teeth on the rotor magnetic the field in the enclosure is not less significant in comparison with the machines, performed according RIS, the change of the magnetic induction in the axial (along the axis of the machine)and tangential (along the circumference of the body) directions. These changes are especially noticeable in induction machines are made for use in Autonomous power supply systems and electric drive, in which to accommodate electric vehicles, there is a limited by their diameter space. In this case, induction machines have a small height the backrest and the diameter and the change of the magnetic induction is a function of the angle of rotation of the rotor so significant, that are the cause of increased eddy current losses in the body, greatly reducing the efficiency and invalid longer transient.
Especially noticeable is marked deficiencies in induction machines, cases of which are made of soft magnetic materials with a relatively low electrical resistance and, as a consequence, large eddy current losses (these materials include all traditionally used for manufacturing stator induction machines mild steel).
Disadvantages of induction machine prototype and analogues claimed as the invention of the induction machine are one of the main reasons that, with such extremely important for use in electronic systems is rosnaree and drive Autonomous objects and other engineering fields qualities, as simple structure, apparatus, ability to work under the most severe operating conditions and high levels of mass and energy data at high speeds, they are limited in their application.
The technical result of the invention is to reduce losses in case induction machines, increasing their efficiency, reducing time transients and thereby eliminating restrictions for their wider application in Autonomous power supply systems and electric and other fields.
This technical result is achieved by the fact that in the known induction machine, containing mounted in the magnetic housing of the stator in the form of two laminated packages of magnetic material with teeth on their inner surfaces, the working winding, the coils of which are located in the grooves between the teeth, limited by the height of the backs of these packages, two sets of rotor installed inside the bores of the wound stator, and a field winding, characterized in that provided with external teeth which are oriented along the axis of the machine, the number of which equals the number of teeth on the inner surface of the wound stator, and above parts of the backs of each of the stator pack, with lots of backs under the outer teeth are located between the inner and teeth wound stator, as in the case with its internal side is made grooves for placing external teeth wound stator.
In addition, as the magnetic material of the case can be used soft magnetic composite material.
The invention is illustrated by drawings, where figure 1 shows a longitudinal and transverse sections duppattas induction machine with three teeth on the rotor and six teeth on the stator (the machine with the so-called classic the sockets zone), and figure 2 is a top view of the reamer body of this machine. The dotted lines on this drawing shows the projection on the outer surface of the outer teeth wound stator with a trapezoidal shape and a trapezoidal shaped grooves in the housing. Figure 3 shows the shape and arrangement of the trapezoidal grooves (they are plotted as solid lines), and a stepped rectangular grooves (dashed lines) on the inner surface of the housing. Figure 4 shows the placement on the surface of the rectangular grooves.
Induction machine has mounted in the cylindrical housing 1 of the stator in the form of two laminated packages 2 and 3 of magnetic material with the teeth 4 on the inside surface, the working winding 5, sections which cover located against each other, the teeth 4 of the two packages stator 2 and 3 and are located in the grooves between the teeth 4, limited the height of the backrest 6 of these packages 2 and 3 (backless highlighted in figure 1 by dashed lines), two sets of rotor 7 and 8, mounted within the bores of packages 2 and 3 of the stator and shifted relative to each other by half subcatego division and the field winding 9, which is installed between packets of the rotor 7 and 8. On the outer surface of each stator pack 2 and 3 above sections of the backrest 6, located between the internal teeth 4 of these packages, executed oriented along the axis of the machine, the teeth 10. The number of these teeth is equal to the number of stator teeth on the inside surface. For placing external teeth 10 of the wound stator in the housing 1 is made grooves. The height of the outer teeth of the stator 10 is made smaller than the height of the housing 1. The cross-section of these teeth and grooves for placement in the housing 1 has a trapezoidal shape.
The proposed solution involves only a sample of metal from the whole body induction machines under the grooves and filling these grooves laminated along the magnetic field lines external teeth wound stator that does not cause any change in the operation of these machines is neither steady-state nor transient, and only leads to the reduction of eddy currents and losses in the volume selected for the slots of the metal housing and losses in other areas by equalizing them in magnetic induction.
The change in the flux linkage of the working winding induction machine, done is authorized in accordance with figure 1, comes with period T=l/f=60/(Zpn),
where: f - frequency current; Zp- number of teeth of the rotor; n is the rotor speed in min-1.
When specified in figure 1 the position of the rotor magnetic fluxes in the teeth of the stator 4 is arranged coaxially with the rotor teeth, the maximum (equal to fz c max), and in adjacent teeth, coaxially located with the cavities of the rotor is minimal (equal to fz c max). After a half period of the pattern of distribution of magnetic flux in the teeth 4 of the stator is changed to the opposite. The teeth 4, in which the magnetic flux had a maximum value at the troughs, and the magnetic flux is reduced as a consequence to their minimum values, and in the adjacent teeth, which are above the teeth of the rotor, the magnetic flux reaches the maximum value. After a period, which corresponds to the rotation of the rotor on subzone division, the pattern of distribution of magnetic flux in the teeth 4 of the stator adopts its original appearance. Thus, the magnetic fluxes in the teeth of the stator is changed between the maximum and minimum values with a frequency of
The coils of the working winding 5 cover located two against each other prong of both packages 2 and 3 of the stator, so their cross-section is threaded difference flows in these teeth. Because these threads have protivopolojnoe direction, the resulting stream, coupled with the coils of the working winding 5, varies between two extreme values, is equal to fz c max- Fz c minin (fz c max- Fz c min). Periodic change of magnetic flux linked with the coils of the working winding 5, causes it periodically varying at the same frequency EMF. With the same frequency is changed and the tangential component of the magnetic flux in the outer prongs 10 packets stator fz c drug.
The height of the housing 1 over the exterior teeth of the packages 10 of the stator when the implementation of the proposed technical solution is selected from maintaining the necessary mechanical strength of the design of the machine.
The greatest effect from the implementation of this technical solution with trapezoidal shaped teeth 10 on the outer surface of the stator is achieved by performing the slots in the housing through the height of the outer grooves of packets equal to the thickness of the body). Through the laminated external teeth 10 of the wound stator in the tangential direction (along the circumference of the wheel teeth with a maximum flow to the tooth with minimal flow) passes the magnetic flux, equal to
Fz c drug=0.25(fz c max- Fz c min)
The cross-sectional shape of teeth 10 on the packages 2 and 3 of the stator and the slots for them in the housing can be performed not only keystone (it suitable for all kinds of what is optimal from the point of view of the magnitude of the magnetomotive force (MMF) of the excitation winding, required to conduct magnetic flux through the body), and rectangular (figure 4), which is preferable from the standpoint of simplicity and the complexity of the technological process of manufacture and Assembly, wound stator. Compromise is a step-rectangular shape of the outer teeth of the wound stator and the slots in the housing, combines the advantages of trapezoidal and rectangular shapes (outlines step-rectangular grooves in the housing shown in figure 3 by dashed lines).
To achieve maximum effect from the implementation of the invention for the manufacture of wound stator is desirable to use high-quality magnetic materials, such as are widely used in aviation electrical engineering, iron-cobalt alloys CH, CF, and other materials with high values of magnetic permeability and saturation induction and low specific losses. The application allows you to achieve almost uniform magnetic field in the areas of housing, which are located on the internal teeth of the stator, and to reduce the ripple of the axial and tangential components of the magnetic induction in the medium located between the wound stator field housing, which eliminates the appearance of this area of the case eddy currents and training is a result of their losses and to avoid unacceptable increases in time of the transient.
An optimal solution to the problem of reducing losses in the housing can be achieved if in addition to implementing its proposed technical solutions and appropriate selection of the material for making bags of the stator to produce a body of modern soft magnetic composite materials type Somaloy with unlike traditionally used for its manufacture of low-carbon steels (steels 10, 20 and others) large electrical resistance and consequently significantly fewer losses.
The use of the invention enables the reduction of losses in the case induction machines, increasing their efficiency, reducing the time transients and thereby eliminating restrictions for their wider application in Autonomous power supply systems and electric and other fields.
1. Induction machine, containing mounted in the magnetic housing of the stator in the form of two laminated packages of magnetic material with teeth on their inner surfaces, the working winding, the coils of which are located in the grooves between the teeth, limited by the height of the backs of these packages, two sets of rotor installed inside the bores of the wound stator, and a field winding, characterized in that provided with external teeth which are oriented along the axis of the machine, the number of which equals the number who have teeth on the inner surface of the wound stator, and above parts of the backs of each of the stator pack, with lots of backs under the outer teeth are located between the internal teeth of the wound stator and the housing with its internal side is made grooves for placing external teeth wound stator.
2. Induction machine according to claim 1, characterized in that as the soft magnetic material used soft magnetic composite material.
SUBSTANCE: electric machine includes case with end screens, housing a laminated stator core with slots where winding coils are located and fixated by wedges, with rotor positioned inside stator cavity and including inducer actuating poles, permanent magnets, no-magnetic wedges and shaft, so that rotor length exceeds inducer length. Rotor end sections are made in the form of cylindrical bushings out of non-magnetic material, flush-mounted on external surface of inducer, rotor bearing unit allows for static gas and dynamic gas support, and for that purpose external rotor features cylindrical surface and is positioned inside cylindrical cavity of the bushing fixated in the stator cavity with gas supply for stator surface cooling, while case cavity has cooling gas supply and drain, and for that purpose internal surface of the case features longitudinal ducts joining radial ventilation ducts made between stator core stacks. According to invention, stator can be vented separately by at least two pipes in the case for cooling gas supply/drain to/from the case volume occupied by the stator, the bushing has longitudinal lugs matching stator core slots in number, positions and cross-section and fit into the slots, slot vent gap is left between lug surface and slot wedge, lengthwise holes are made in longitudinal lugs of the bushing and connect to radial feed orifices opened into internal cavity of the bushing, cylindrical bushings out of isolating material are installed in the case cavity coaxially to stator core cavity and attached by their ends to the ends of outmost stator core stacks, external surface on the ends facing end screens feature o-ring pairs, and end screen junction with the case is sealed. Cylindrical bushings serve as external cartridges of radial gas-dynamic leaf bearings, and rotor end sections serve as trunnions of the bearings, in addition the electric machine features at least one axial gas-dynamic leaf bearing, and orifices are made in end screens, with orifice inlets connected to lubricating gas source and outputs joining annular slot between o-ring pairs, which in its turn joins longitudinal through holes of the cylindrical bushing. Besides, a screen features pipe connected to separate source of cooling gas and joining permanent magnet cooling ducts formed by slot bottom section and permanent magnet surface facing them, via end sections of inducer, and at the opposite case end the ducts are connected to process gap of axial gas-dynamic leaf bearing which in its turn is connected to gas collector.
EFFECT: efficient cooling of stator winding and core, reduced weight and dimensions, improved service life of electric machines, minimum rotor bend, efficient cooling of permanent magnets, extended rotor stability range due to damping by radial gas-dynamic leaf bearings, prevention of rotor jamming at high circular velocities in vicinity of gas-dynamic leaf bearings.
4 cl, 3 dwg
SUBSTANCE: invention is related to the area of electric engineering and namely to electric machines with permanent-magnet excitation, and it may be used in electric machine engineering. At that the invention ensures improved rotation uniformity, enhanced energy indicators, reduction of noise and vibration level for the magnetoelectric machine. In the suggested magnetoelectric machine including armature with winding laid in z slots and non-salient pole rotor with permanent magnets the armature slots are bevelled at the angle α corresponding to an integer number of tooth harmonic periods.
EFFECT: decreasing reactive moment pulsation for the magnetoelectric machine.
FIELD: engines and pumps.
SUBSTANCE: invention relates to electrical engineering and machine building, particularly, to borehole motors to lift bed fluid. Proposed borehole motor comprises stator with toothed magnetic core accommodating the rotor. Stator teeth internal surface has grooves regularly arranged in circle in axial direction, the number making three, or being multiple of three.
EFFECT: lower reactionary torque, hence, vibration, better starting properties.
2 cl, 8 dwg, 2 tbl
SUBSTANCE: present invention relates to electrical engineering, particularly electrical machines, and peculiarities of making permanent-magnet synchronous motors for a drainage pump. The disclosed synchronous motor comprises a permanent-magnet rotor for rotating the a rotor wheel, a pump housing on which the permanent-magnet rotor rests, a stator core and a stator coil. According to the invention, the stator coil has a winding made of aluminium enamelled wire and is provided with a part for connection by welding the lead wire of said winding with a contact for connecting with the lead wire; the winding is hermetically insulated in a protective housing; the outer surface of the part for connection by welding of the lead wire of the winding made of aluminium enamelled wire is tin-plated by soldering or tin electroplating, wherein the part for connection by welding of the lead wire, tin-plated by soldering or tin electroplating, is welded to the contact for connection with the lead wire; the outer surface of the winding made of aluminium enamelled wire is first coated with insulating paper tape and then hermetically insulated by said protective housing.
EFFECT: enabling prolonged operation of motors in an air medium containing oxygen without oxidation of the aluminium lead wire while simplifying the process of welding said lead wire and simplifying the process of welding to a contact terminal; protecting aluminium enamelled wire from damage under the action of high temperature during hermetic insulation of the winding in the protective housing, formed by filling with plastic or epoxy resin.
8 cl, 4 dwg
SUBSTANCE: stator has a variety of segments located close to each other in the circumferential direction. According to the invention the above segments have teeth and slots passing in the longitudinal direction of the stator, at that the neighbouring segments touch each other at the segment boundary and teeth of the neighbouring segments are located so that at the segment boundary a tooth of one segment touches the tooth of the neighbouring segment, herewith the total width of the teeth touching each other at the respective boundary is bigger than the total width of the majority of teeth which are not placed at the segment boundaries or all teeth which are not placed at the segment boundaries directly, at that the minority of teeth not placed directly at the boundary of the specified segments has the same width, which is bigger than the total width of the majority of teeth which are not located directly at the segment border.
EFFECT: potential reducing of clamping moment or pendulous breaking in the rotating electric machine excited by permanent magnets.
5 cl, 3 dwg
SUBSTANCE: permanent magnet machine contains a fixed stator and a movable rotor made of non-magnet material, in the stator frame there are U-shaped imbricated cores with windings, the rotor contains operating components made as the permanent magnets placed in the openings in the form of slots with size l and l1, at that the number of slots m is equal to the number of the permanent magnets. At that the stator frame of the permanent magnet machine is made as a hollow cylinder with at least 3 groups of U-shaped imbricated cores with windings placed at its inner surface. Each group contains at least 3 U-shaped imbricated cores with windings interconnected in series and shifted in regard to each other per the distance L. The rotor is placed inside the stator and consists of a hollow cylinder with the permanent magnets placed in its slots and shifted in regard to each other per the angle of α=120°, poles of the permanent magnets protrude the limits of the hollow cylinder per a value Δ: Δ=d-l', where Δ is a value of the magnet poles protrusion outside the limits of the hollow cylinder; d is a circle diameter defined by the inner diameter of the stator and sizes of the magnet core; l' is a value of the air gap between the magnet core and the magnet.
EFFECT: improving efficiency of the permanent magnet machine with simultaneous reducing of pulling force in the axial direction and simplifying of the design, providing maximum power factor at the disc-type design of the machine.
SUBSTANCE: invention relates to electrical engineering and design of electrical machines, particularly single-phase alternating current generators. The technical result achieved by using the present invention is considerably high efficiency and improved electromechanical properties of single-phase generators. Said technical result is achieved due to that in a single-phase synchronous generator with an annular armature winding, consisting of an armature and an inductor, separated by an air gap, according to the invention the armature consists of two series-connected annular windings with semi-annular ferromagnetic cores, the nearest rectangular ends of which are attached by nonmagnetic bushings, and the inductor consists of a central cylindrical core mounted on a rotating shaft, wherein on diametrically opposite surfaces of the core there are two rod-shaped permanent magnets with concave like poles. During operation of the generator, turns of the annular windings are penetrated by induction field lines of one direction, originating from like poles of the permanent magnets of the inductor.
EFFECT: structure of the armature enables to direct magnetic field lines thereof around a circle and considerably reduces not only active, but inductive resistance armature windings as well.
SUBSTANCE: low-speed current generator has, mounted on a shaft, a rotor with a multipolar system of permanent magnets, a stator in form of a magnetic conductor and stator windings, leads of which are connected to corresponding rectifier units, a high-frequency pulse master generator and as many power correctors as there are rectifier units, each connected to the output of the corresponding rectifier unit and control inputs of which are connected to the output of the high-frequency pulse master generator, wherein the stator is single-sectional, and the number of poles of the rotor differs by one from the number of stator windings, the stator being cogless.
EFFECT: high stability of operation of the generator.
3 cl, 4 dwg
SUBSTANCE: magnetic generator comprises a non-magnetic body, in which cores of working windings of a stator and a rotor made of non-magnetic material are fixed and evenly distributed along the circumference. Cores of the working winding of the stator consist of an H-shaped magnetic conductor and two fixed DC electromagnets installed at its ends, and mobile DC electromagnets are fixed on the rotor. Poles of DC electromagnets of the rotor are aligned in turns as like and unlike towards the specified poles of DC electromagnets of the H-shaped magnetic conductor. During rotor rotation, as at least one DC electromagnet of the rotor aligned in a heteropolar manner approaches one DC electromagnet of the H-shaped magnetic conductor of the stator working winding, the magnetic flow between their poles is closed, and inducing of electromotive force on the working winding of the stator is provided by two other DC electromagnets of the rotor and stator aligned in a unipolar manner. Simultaneous interaction of DC electromagnets of the rotor and stator aligned in a unipolar and heteropolar manner creates an effect of magnetic balance.
EFFECT: higher efficiency factor by usage of DC electromagnet energy.
SUBSTANCE: method to manufacture a rotor (14) is proposed for an electric machine (13), including the following stages of its realisation: a) manufacturing of a magnetic element (8) by means of adhesion of permanent magnets (1, 1', 1", 1'") to each other with the help of the first glue, at the same time each permanent magnet (1, 1', 1", 1'") has one side (2) with the magnetic north (N) and one side (3) with the magnetic south (S), at the same time permanent magnets (1, 1', 1", 1'") when adhered are arranged so that sides of the magnetic north (N) or sides of the magnetic south (S) form a common lower side (3, 3', 3", 3'") of the magnetic element (8), at the same time the first glue in the hardened condition has the solid consistency; b) adhesion of the lower side of the magnetic element (8) with the yoke (12) with the help of the second glue, at the same time the second glue in the hardened condition is soft and elastic, which eliminates break of the second glue as the temperature of expansion of the magnetic element (8) and the yoke (12) increases. At the same time the yoke (12) in the place where the magnetic element (8) is adhered to the yoke (12), has the soft and elastic layer (2).
EFFECT: provision of rationality of rotor manufacturing process with permanent magnets with simultaneous provision of high reliability of permanent magnets fixation with closure on material of an electric machine rotor yoke.
3 cl, 7 dwg
SUBSTANCE: invention is related to the field of electric engineering, and namely to electric machines and is referred to design of axial inductor electric machines. The suggested axial inductor electric machine with electromagnet excitation contains the stator housing, stator magnet packs, excitation windings, windings of alternating electromotive force, the rotor and rotor magnet packs. According to the invention a cylindrical turbine rotated in a flow of gas or another medium as the rotor shaft is equipped with three geared magnet packs place axially to the stator windings at the outer diameter of the turbine shaft and are shifted per ⅓ of the geared section and without open magnetic-air gap with the stator windings they form the three-phase system of a reversible electric machine. In motor operation one type of control voltage is supplied to the windings of alternating electromotive force in the form of sequential rectangular electrical pulses which duration defines frequency of the rotor shaft rotation.
EFFECT: in motor mode one type of control voltage is used, in generator mode electric energy can be generated using flows of different media and implementing the function of a starter-generator with high shaft torque in a wide range of preset rates, with high mechanic endurance and high degree of protection.
SUBSTANCE: according to the invention the suggested inductor-type generator containing the front and rear covers, a stator with an operating winding, an excitation source and a rotor with a shaft, is equipped additionally with a ferromagnetic ring, closing elements, a star-shaped magnet core with an opening and a non-ferrous insert; at that the ferromagnetic ring is inserted tightly with its first lateral side in the stator zone free of end-connectors, at the other side of the ferromagnetic ring there are installed the closing elements connected to sprocket teeth and the sprocket itself is connected to the rear cover by the non-ferrous insert and the rotor with the shaft is placed in the central opening of the sprocket.
EFFECT: generating electromotive force at rotational speed from low values up to the rated values of the rotor shaft of the synchronous inductor-type generator in comparison with the demand to ensure rotor rotation for operation of an induction generator above the rated speed value.
SUBSTANCE: invention is referred to the field of electric engineering, in particular, to electric machines and namely to synchronous generators of inductor type used, for example, in motor and tractor equipment. According to the invention in the claimed synchronous generator containing an excitation source, a stator with polar tips and winding, a drum rotor with a shaft and covers with tightening bolts, the butt end of horizontal rack of the outer L-shaped magnet core is connected to the stator back and between the stator teeth and cover there is a non-magnet insert, a vertical rack of the outer L-shaped magnet core, the excitation source, a vertical rack of the inner L-shaped magnet core while the horizontal rack of the inner L-shaped magnet is located in the rotor butt end.
EFFECT: providing contact-free operation of a synchronous generator of inductor type at simultaneous potential use of a standard stator design and ultimate simplification of the rotor design.
SUBSTANCE: invention is referred to the field of electric engineering, in particular, to electric machines and relates to synchronous generators of inductor type used, for example, in motor and tractor equipment. According to the invention in the claimed synchronous generator containing an excitation source, a stator with polar tips and winding, a drum rotor with a shaft and front and rare covers with tightening bolts, the front rotor cover is equipped with openings through which radial magnet core is passed and to its outer end an axial magnet core is connected which in its turn is connected to the stator back while the inner end of the radial magnet core is connected to the excitation source and the angular magnet core having horizontal and vertical racks, at that the outer butt end of the horizontal rack is mounted at the rotor butt end.
EFFECT: providing contact-free operation of a synchronous generator of inductor type at simultaneous potential use of a standard stator design and ultimate simplification of the rotor design as well as standard, unified and cheap design of the excitation source.
SUBSTANCE: inductor electric machine comprises a stator with a working winding and an excitation winding in the form of a coil, a rotor placed inside a stator and mounted on a non-magnetic shaft, magnetically conductive shields, equipped with ledges, between which there is an external closed magnetic conductor with adjacency to it, at the same time there are three excitation windings, every of which is equidistant from the adjacent ones by 120° and is made according to the type of a three-phase three-bar transformer, the rods of which are arranged in the same plane and are oriented tangentially to a generatrix of the rotor made in the form of a steel cylinder, which have channels drilled along the perimeter, where copper electrically isolated conductors are inserted according to the shape of cylindrical springs, which electrically connect at the ends of the rotor with copper rings, having holes that are coaxial to copper cylindrical springs.
EFFECT: expanded ranges of speed and capacity of inductor electric machines.
SUBSTANCE: inductor generator includes static stator (1) that consists of central cylindrical core (2) and two side rods (3) located around and symmetrically to the core (2), the core and the rods have common foundation (4), the rods front parts are done in the form of sectors with arc length equal to π/2, near the stator there is a salient-pole rotor (5) that has the central part (6) contacting the stator core (2) with a gap and two poles (7) performed in a form of sectors with arc length equal to π/2, i.e. equal to the sectors arc length of stator rods. Note that the section area of rotor pole (7) sector is equal to section area of stator (1) rod (3) sector, rotor poles (7) are arranged parallel to stator rods, there is an excitation winding (8) in a form of a coil at the central cylindrical core (2). There is power winding (9) at the side rods (3) covering the corresponding rods and performed in a form of coils. Rotor shaft (10) is connected to the mechanism that activates rotor rotation.
EFFECT: creation of inductor generator that has simple structure and able to generate electric energy in a form of one-phase or three-phase current with high coefficient of efficiency.
9 cl, 5 dwg
SUBSTANCE: reactive switched electrical machine with rotation symmetry consists of stator 1 with even number of poles Zs and coils 2 located on them with polyphase winding and even number of phases, windingless rotor 3 with odd number of poles Zr. According to invention number of stator poles is calculated as per the formula: Zs = 6·n where n=1, 2, 3…, number of rotor poles Zr is calculated as per the formula Zr = Zs ± 3. At that adjoining phase windings of stator have alternate polarity; all phase coils within limits of one phase are connected in opposition, magnetic field of active phase is closed through other phases and it allows development of polyphase electrical machine with even number of phases which magnetic structure has rotation symmetry with angle of rotation equal to 120°.
EFFECT: reduction of converter costs.
SUBSTANCE: invention refers to the design of non-contact synchronous electric machines with axial excitation and can be used in wide range of frequencies of machine shaft rotation (from units of revolutions per minute to several tens of thousand revolutions per minute) in automation systems, independent electric equipment systems, in military, space engineering, on aviation and automobile transport, as traction controlled and non-controlled electric actuators, wind-driven generators, multiphase synchronous motors and high-frequency synchronous electric AC generators, multiphase generators of frequency converters (including three-phase systems), as well as at rectification of output variable voltage and current of generators by means of semiconductor rectifying devices and with possibility of using smoothing filters to reduce fluctuations of output parameters - as DC (rectified current) power supply sources. Stator of non-contact electric machine with axial excitation includes odd and even armature cores with salient poles of armature, which represent laminated packs from insulated electrotechnical steel plates with high magnetic permeability and fixed in soft magnetic housing; the number of armature cores - not less than two, on salient poles of armature there concentrated is coil multi-phase armature winding, each coil of which envelopes in axial direction one of salient poles of armature of each armature core; between armature cores there located are ring-shaped coils of inductor excitation winding, the axes of which coincide in axial direction with machine shaft axis, connected to each other in magnetic opposite ratio, of ring-shaped coils of inductor excitation winding is one less than the number of armature cores. Rotor without winding includes non-magnetic shaft with soft magnetic bushing on which there coaxially located are odd and even rotor magnetic conductors with pole projections, which are represented with laminated packs and consist of insulated electrotechnical steel plates with high magnetic permeability; the number of rotor magnetic conductors is equal to the number of armature cores; odd and even rotor magnetic conductors are located relative to the appropriate odd and even armature cores and have the same active length in axial direction; even rotor magnetic conductors are offset relative to odd magnetic conductors in tangential direction through the half of pole pitch of rotor magnetic conductor. At that, certain ratios are fulfilled between the number of salient armature poles, number of phases of multi-phase coil winding of armature, number of salient poles of armature in phase and number of pole projections of each magnetic conductor of the rotor.
EFFECT: obtaining reliable design appropriate to the material of multi-phase non-contact electric machine with axial excitation with high energy properties and operating characteristics at wide range of shaft rotation frequencies and with various ratio of active length and bore diameter of machine stator.
18 cl, 5 dwg
SUBSTANCE: in the proposed synchronous reluctance machine, which comprises a multiphase power winding on a stator, which is evenly distributed along an inner bore of the stator and designed for connection to a valve converter, and also a multiphase excitation winding with a full pitch, designed for connection to controlled exciters, according to the invention, at the edges of each rotor pole there is a corrugation arranged in the form of grooves with the pitch h = 8 - 10 mm, and their bases are located in planes parallel to axis of rotor rotation, at the same time the width of each groove is a = 2 - 4 mm, the depth b = 8- 10 mm.
EFFECT: reduced heating of a synchronous reluctance machine rotor due to lower magnetic losses caused by pulsations of excitation magnetomotive force.
3 dwg, 2 ex
SUBSTANCE: invention refers to low-speed high-torque electric motors, electric drives and generators, to the design of non-contact electric machines with electromagnetic reduction and can be used in automation systems as motorised wheels, motorised drums, starter-generators, electric steering wheel boosters, direct drives in domestic equipment, electric drives of high and average power of ships, trolleybuses, trams, concrete mixers, lifting mechanisms, belt conveyors, liquid transfer pumps, mechanisms with high torques on the shaft and low frequencies of its rotation, as well as direct drives without using any mechanical reduction gears, as well as wind-driven generators, hydraulic generators, high-frequency electric generators, synchronous generators of frequency converters and as controlled stepped motors. Non-contact electric reduction machine with salient-pole armature includes stator with housing made from soft magnetic material with odd and even packs of stator, which are laminated and consist of insulated electrotechnical steel plates with high magnetic permeability, and the number of which is not less than two; non-magnetic shaft with bushing from soft magnetic steel with high magnetic permeability with odd and even rotor packs with high permeability, which are laminated and consist of insulated electrotechnical steel plates, and the number of which is equal to the number of stator packs; active length of extreme stator and rotor packs in axial direction is equal if the number of stator packs is more than two; active length of stator and rotor packs in axial direction, which are located between extreme packs, is more by two times than active length of extreme packs; stator packs contain salient poles uniformly distributed along cylindrical surface, on inner surface of which there are elementary teeth, the number of salient poles on each stator pack is equal, the number of elementary teeth on each salient pole of stator pack is equal, stator packs in tangential direction are located so that axes of their salient poles located opposite each other in axial direction coincide; rotor packs contain the teeth uniformly distributed along cylindrical surface and the number of which on each rotor pack is equal; even rotor packs are offset relative to odd rotor packs in tangential direction through the half of tooth division of rotor pack, on salient poles of stator packs there is coil m-phase winding of armature, each coil of which in axial direction envelopes the appropriate salient poles of even and odd stator packs of one pole of each pack; between stator packs there located is excitation winding of inductor, which is made in the form of ring-shaped coils with longitudinal axis coinciding with longitudinal axis of machine, number of ring-shaped coils of excitation winding of inductor is one less than the number of stator packs. At that, there shall be certain relations between the number of salient poles of armature, number of elementary teeth on salient pole of armature, number of salient poles of armature in phase, total number of armature teeth, number of teeth on each pack of rotor and number of phases of m-phase armature winding.
EFFECT: manufacture of high-technology constructions of non-contact electric reduction machines with salient-pole armatures by applying electromagnetic reduction in wide range at providing high energy parametres and operating characteristics with possibility of smooth and deep control by means of output parametres.
9 cl, 5 dwg, 1 tbl
SUBSTANCE: invention relates to electrical machines, namely to synchronous generators of inductor type used, for example, in motor and tractor equipment. Invention is intended to enable use of classical stator with ferromagnetic rotor in induction machine version. According to invention, to achieve this, in electric power generator featuring axial excitation source, operating coil, stator, geared disc rotor with shaft, the stator is made in the form of bowl, excitation source is mounted in the bowl centre, and rotor bearing is mounted on the top end of the excitation source.
EFFECT: practical rotor structure, possibility to use bowl-shaped stator.