Submerged motor rotor
SUBSTANCE: invention pertains to the field of electric engineering, in particular to eclectic motors with permanent magnets used, for example, for submerged electric drive without formation fluid lifting. The motor rotor comprises a key-slotted shaft, the core pack made of electric steel plates with alternating poles, and each of them is formed by two V-mounted prismatic permanent magnets with tangential magnetism faced to the pole by its one polarity. The magnets are placed in slots of the pack plates and do not touch each other. The number of magnets is twice bigger than the number of poles. At inner surface of poles of both polarities there are slots along the pole axis.
EFFECT: improvement of the motor output performance due to scattering of magnetic flow at maintained rotor strength.
5 cl, 5 dwg
The invention relates to the field of electrical engineering, in particular for electric motors with permanent magnets used, for example, in the submersible actuator for lifting reservoir fluid.
The design of the submersible motor is relatively small diameter and a large length, and the shaft is, as a rule, of conductive material. The cavity between the stator and rotor submersible motors filled with liquid, so it is desirable that the permanent magnets in such motors were mechanically protected.
Known rotors of the motors, in which permanent magnets magnetized in the radial direction and located in "Windows", vyshtampovannyj in sheets of electrical steel, of which holds the magnetic circuit of the rotor [Sagalowsky A. C. a New generation of brushless motors of "the Wrestler" is a new step in energy conservation//Engineering practice. 2010. No. 8. C. 28].
The drawback of such rotors is a relatively low value of induction in the working gap of the motor, which results in low values of the specific developing moment.
Known rotor magneto-electric machine, which contains a package of conductive plates of steel with holes, and permanent magnets prismatic shape with a tangential naman is the availability of N-S, installed in the holes in the plates at an angle to the radial axis so that the distance between the opposite poles of two adjacent magnets on the outer arc is less than the inner, and holes are made V-shaped, and installed the magnets forming the pole division, touching the same poles [Patent No. 2316103 of the Russian Federation, IPC H02K 1/27, H02K 21/14, 2005].
No jumper between the pole and the inner ring magnetic circuit reduces the mechanical strength of the rotor. During rotation of the rotor to the outer ring is applied centrifugal force of the weight of the pole and two magnets. This tends to increase the radial dimension of the outer ring of the magnetic circuit, resulting in increased flux already on the outer ring, not allowing to significantly increase the useful stream.
Known rotor submersible electric motor containing a shaft with keyway, the magnetic circuit package of rolled steel plates with poles of alternating polarity, each of which is formed by two facing toward the pole of one polarity V-shaped spaced permanent magnets prismatic shape with tangential magnetization, not touching each other and located in the slots of the plate pack having an inner and outer surface without gaps, and the number of magnets in the two times is more number of poles [Patent No. 2244370 of the Russian Federation, IPC NC 1/06, NC 21/12, 2003].
By the combination of features of the object closest to the claimed. Due to the fact that in the magnetic system of the rotor formed of magnetic fluxes, it has the potential of getting in the gap of the electric motor of values induction greater than the value of the induction of a short circuit of the permanent magnet. This provides increased Electromechanical and energy performance of the motor.
The disadvantage of the rotor is increased scattering of the magnetic flux in the magnetic system. Indeed, the scattering plot the pole-shaft" is limited only by the saturation of the extremely small span lengths between the converging faces of the permanent magnets adjacent to the shaft, and the mechanical communication with the shaft carried by the ledge on the inner surface of the magnetic circuit. To preserve the mechanical strength of the sheet width saturating areas is 0.5-1.5 mm, and passing through them, and the shaft flux is a significant part of the full flow of the pole.
The present invention is aimed at improving Electromechanical and power characteristics of the motor by reducing magnetic flux leakage, while maintaining the mechanical strength of the rotor.
This technical result dost is presumed to those in the rotor submersible electric motor containing a shaft with keyway, the magnetic circuit package of rolled steel plates with poles of alternating polarity, each of which is formed by two facing toward the pole of one polarity V-shaped spaced permanent magnets prismatic shape with tangential magnetization, not touching each other and located in the slots of the plate pack having an inner and outer surface without gaps, and the number of magnets is twice the number of poles according izobreteniya the inner surface of the poles of both polarities along the axis of the poles made grooves.
To simplify Assembly, the grooves along the axis of the poles of one polarity, it is advisable to fulfill with a width less the width of the groove located on the axis of the poles of the other polarity.
Preferably, the radial dimension of the groove in the center was more than the edges, this will keep the same degree of saturation along the entire length of saturable sites (jumpers).
Scattering is minimal, if for a mechanical coupling of the magnetic circuit package with the shaft are pins of a nonmagnetic material.
In addition, on the outer surface of the plates megapolises axis of each pair of adjacent poles can be made of the recess and the plate, at least part on the Yusov are welded along the entire length of the magnetic circuit with the formation of the weld on the bottom of the fill.
The invention is illustrated by drawings.
In Fig. 1 shows a cross-section of the rotor with grooves made on the inner surface of the poles of both polarities along the axis of the pole; Fig. 2 is a cross section of the rotor with grooves of different width, Fig. 3 - fragment a of Fig. 2 in an enlarged scale; Fig. 4 is a cross section of the rotor without grooves in two adjacent poles of one polarity, and Fig. 5 is a cross section of the rotor with grooves on the outer surface.
The rotor submersible electric motor includes a shaft 1 on which is located the magnetic core 2, composed of rolled steel plates (Fig. 1, 2, 4, 5). The inner and outer surfaces of the plates are made without breaks. In the Windows of the magnetic circuit 2 is placed permanent magnets 3, magnetized in the tangential direction so as to create alternating North and South poles of the rotor. On the inner surface of the magnetic core 2 along the axis of the poles made the grooves 4, in one or more of which has pins 5 which serve for the transmission of the useful torque on the shaft 1. On the outer surface of the rotor megapolises axis of each pair of adjacent poles can be made of the recess 6 (Fig. 5), which can be used to join the plates together by welding so that the weld seam passing through the bottom of the grooves 6, did not go beyond forming the environment and the efficiency of the poles. The presence of these notches further reduces leakage flux.
Open for magnets 3 and grooves 4 formed in the magnetic core 2 internal saturable sections 7 (Fig. 3).
The rotor of the electric motor is an inductor, i.e., the source of magnetic flux. Created by the permanent magnets 3 stream pole (Fig. 1, 5) contains a useful thread fpalso connected across the stator, and the main flows of dispersion: flow fs1connected via an internal saturable jumpers 7 and the shaft 1, the flow fs2connected via jumper wires 8, adjacent to the external generatrix of the rotor (Fig. 3).
The smaller the value flows scattering, the more perfect the motor. The amount of threads scattering is determined by the degree of saturation of the conductive jumpers and their length.
The greater the length of saturable sites 7, the higher their magnetic resistance flows scattering, which closed chain: a pole of one polarity - saturating the plot pole of one polarity - Val - saturating the plot pole of the other polarity pole of the other polarity. In known magnetic system the length of the saturable site for flux fs1extremely small, which leads to increased scattering of the magnetic flux of permanent magnets. In the rotor of the proposed design the length of the saturable teaching tcov at least an order of magnitude greater.
The optimal dimensioning of the mechanical strength of the dissipation factor will be the case when the thickness of the saturable sections 7 will be the same throughout their length. For this purpose, the grooves 4 it is advisable to perform with the radial center dimension greater than at the edges, such as "roof-like" (Fig. 1-5).
In the case of a large number of poles may be insufficient strength of the area between the slots 4 through which the transmitted torque of the engine shaft 1. In this case, the grooves 4 are not doing opposite poles adjacent to the pole with the actual keyway slot in which you installed the plug 5, the connecting shaft 1 with the magnetic circuit 2 (Fig. 4). Manufacturer of pins 5 of non-magnetic material reduces the scattering of the magnetic flux.
When performing slots 4 across all of the poles there is a risk that during Assembly of the motor of the packages can be installed so that one axis will be poles of different polarity. To exclude this possibility, the grooves located opposite the opposite poles, and can be performed with different width (Fig. 2-3).
Thus, the inventive design of the rotor by increasing several times the length of the saturable sections of the magnetic circuit formed for Windows magnets and the upper sides of the slots, allows to reduce the magnetic flux is a, and as a consequence, to improve Electromechanical and power characteristics of the motor.
1. The rotor submersible electric motor containing a shaft with keyway, the magnetic circuit package of rolled steel plates with poles of alternating polarity, each of which is formed by two facing toward the pole of one polarity V-shaped spaced permanent magnets prismatic shape with tangential magnetization, not touching each other and located in the slots of the plate pack having an inner and outer surface without gaps, and the number of magnets in twice the number of poles, characterized in that on the inner surface of the poles of both polarities along the axis of the poles made grooves.
2. The rotor under item 1, characterized in that the grooves of the poles along the axis of one polarity is made wider than the grooves of the poles along the axis of the other polarity.
3. The rotor under item 1, characterized in that the radial dimension of the slots of the poles in the centre than at their edges.
4. The rotor under item 1, characterized in that the mechanical connection of the poles with the shaft used dowels, made of a nonmagnetic material.
5. The rotor under item 1, characterized in that on the outer surface of the plates megapolises axis of each pair of adjacent poles made excavation, and plate, at least part of the poles soy is inany welding along the entire length of the magnetic circuit with the formation of the weld on the bottom of the grooves.
SUBSTANCE: invention is related to electric engineering and may be used predominantly for electrical machine constructions, and namely for AC electronic motors and synchronous generator with excitation from permanent magnets. The suggested electrical machine comprises a stator with laminated slots, multiphase armature winding and rotor with slots where permanent magnets are placed thus forming a system with alternating poles, at that active length L of the rotor is selected equal to (2.8-3.1)τ, where τ is polar pitch of the rotor.
EFFECT: improvement of power and dynamic performance of the electrical machine due to increase efficiency of active material usage.
SUBSTANCE: invention relates to the field of electrical engineering, in particular to synchronous machines with combined excitation. According to the given invention on the armature of the synchronous machine containing a multiphase armature winding and face laminated core with multiphase sub-excitating winding, the latter is combined with the armature winding on a part of active length of armature core and forms a part of active length of its coil. The magnetic circuit of the rotor with permanent magnets is made short, forming a free ring band on a part of active length of the armature core, where the additional ring-type magnetic circuit of claw type fixed on the rotor is installed. In a ring-type magnetic circuit in its internal ring hollow the stator-fastened magnetic circuit with a toroidal field coil is installed, which is connected to the machine control and regulation system. During the operation of the synchronous machine the sub-excitation link of claw type with the toroidal winding creates an additional regulated magnetic flux, the direction of which can be co-directional or opposite with the main flow of permanent magnets, that ensures the operation of the synchronous machine both in normal, and in abnormal modes of operations with a possibility of excitation field dampening.
EFFECT: expansion of the range of regulation of output voltage at simultaneous provisioning of possibility for excitation field dampening.
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
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.
FIELD: engines and pumps.
SUBSTANCE: 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.
EFFECT: perfected design.
21 cl, 16 dwg
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: in the process of making an external rotor (17) of an engine, permanent magnets (7) are placed along the peripheral surface (4) of a cylindrical pattern (1); a cylindrical ring (8) is placed on the outer surface of the permanent magnets with pretensioning, wherein the opening (14) of the lower element (13) of the rotor is placed concentrically relative to the peripheral surface (3) of the pattern (1). The invention also relates to the design of a rotor made according to said method. The present method enables to assemble a rotor not in the direction from its outer side to its inner side, but from its inner side to its outer side.
EFFECT: providing high accuracy of positioning inner sections of permanent magnets relative the opening in the lower, ie inner, element of the rotor, or to the position of the engine shaft so as to obtain an air gap with very small clearance, using a pattern which can be made while observing high accuracy of its geometrical dimensions, considerably low cost of making the disclosed rotor.
11 cl, 8 dwg
FIELD: electrical engineering.
SUBSTANCE: rotor consists of the main casing (20) and a range of support casings (30a, 30b), which are fixed on the main casing (20) and supporting permanent magnets (40). The two first support casings (30a) located at distance from each other form entrance area for the second support casing (30b) providing possibility of rigid mounting of the first support casing (30a) to the second support casing (30b).
EFFECT: simplified assembly.
36 cl, 6 dwg
FIELD: electrical engineering.
SUBSTANCE: method includes the following successive steps: a) a set (36) is formed by attaching of at least two unit elements to each other with insulation between them, at that unit elements are magnetised; b) mechanical treatment (68) of main surface for the set of unit elements in order to form cylindrical surface with radius equal essentially to the core radius. The magnetisable set (70) is magnetised; c) magnetised sets are set (72) at the core. At that the above magnetised set forms at least a part of the magnetic pole. Rotor contains the core; at least one magnetic pole is mounted at the core by means of the above method.
EFFECT: ability to resist mechanical impact of magnetic pole during rotor spinning.
10 cl, 8 dwg
FIELD: electrical engineering.
SUBSTANCE: invention may be used, e.g., during installation of a bushing installation around the shaft of an electric machine rotor with permanent magnets or in other devices where the bushing is to be rigidly fixed on the shaft part, simultaneously subject to effects of turning forces, in particular, at a high rotation rate. The proposed method of the bushing installation around the shaft (2) part by way of press fit includes the following steps: installation of a guide element (7, 23) with an external surface (8) that is at least partly conical; installation of the guide element (7, 23) as an extension of the above shaft (1) part (2); the bushing (5) relocation along the guide element (7, 23) onto the shaft (1) part (2); the press (13) relocating in an axial direction towards the conic part (9) during the first stage of the bushing (5) relocation along the guide element (7); usage of a press element (17) with an internal diameter (D10) equal to or in excess of the external diameter (D1) of the shaft (1) part (2) during another stage of the bushing (5) relocation along the guide element (7).
EFFECT: ensuring the possibility of a lengthy bushing press fit installation onto the shaft part at room temperature (the bushing made eg of a synthetic material) to form firm connection between the shaft and the bushing without the risk of the bushing bend or damage with simultaneous saving of time spent on such assembly.
21 cl, 17 dwg
SUBSTANCE: there proposed is rotor (16) manufacturing system and method, as well as magnetisation method of cylindrical element of electric machine (10), in compliance with which multiple segments (28) of constant magnet are fixed around rotor spindle (24). Desired orientation directions (29) of constant magnet segments (28) are determined. Then, mounted constant magnet segments (28) are placed into magnetisation equipment (44) so that desired orientation directions (29) of constant magnet segments (28) are combined with the appropriate flow directions (74) of magnetisation equipment (44). At that, desired orientation directions of constant magnet segments have such configuration that directions of the next orientation are changed from the direction which is essentially normal to the direction of rotor rotation about D-axis of rotor pole, to the direction which is essentially tangent to rotor rotation direction about Q-axis of rotor pole; desired orientation directions of constant magnet segments are determined by means of magnetic analysis by using finite element method according to the main characteristic of which the desired orientation directions of constant magnet segments are such that almost coincide as to the direction with magnetic flow formed with the magnetisation equipment.
EFFECT: simplifying the design, improving the efficiency and shortening the magnetisation process of constant magnet segments in rotors of electric machines.
13 cl, 6 dwg
SUBSTANCE: invention relates to electrical engineering and referred to details of rotor manufacture on permanent magnets for electrical motor where permanent motors (4; 36) in inner side of rotor are arranged in parallel to rotor rotation axis (X) and in area of radial external longitudinal edges (8; 16) of permanent magnets (4; 36). Open outwards grooves are available on the external perimetre of rotor. They are tilted or bent to longitudinal edges (6; 18) of adjacent permanent magnets (4; 36) in the direction of perimetre or at least cross it once. The grooves (6; 18) on external side of rotor in the direction of perimetre are less wide than those close the centre of groove section (6; 18). The form of the groove cross section (6; 18) is constant along rotor length. Besides the invention is referred to such rotor manufacture method.
EFFECT: even change of rotor torque moment with maximum efficiency factor and improved effectiveness and simplified motor manufacture and assembly.
19 cl, 13 dwg
SUBSTANCE: plates are cut of sheets made of non-magnetic material of austenite-martensite grade, which is able to change in process of cold deformation from non-magnet phase to magnet phase, and when further heated - back to non-magnet phase. Such material may be alloy on the basis of austenite-martensite corrosion-resistant steel. At first stock non-magnet sheets are exposed to at least 65% cold pressing, shaping material change over to magnetic phase with magnetic permeability µ>100 Gs/E. Afterwards, with the help of heating by laser radiation up to 1000 - 1200°C, reverse conversion of material phase is carried out in local sections, corresponding to location of non-magnet zones of rotor plates with magnetic permeability µ=1 Gs/E. Previously prior to heating, absorbing coating is applied onto sections of surfaces that correspond to arrangement of non-magnet zones, and the coating increases thermal effect at least 2.5 times. For reliable preservation of material magnet phase resistance it is optimal that its temperature is at least 500°C below temperature of converted local sections heating. After heating and further natural cooling on air, coating is removed, rotor plates are cut as per program and are fixed to each other in axial direction into packet, which is installed on rotor shaft. Heating with laser radiation is carried out by means of sheet surface scanning by focused or non-focused laser beam. Gradient material has high mechanical characteristics (yield point on both phases is at least 80 kG/mm2) while magnetic permeability of magnetic material is at least 100 Gs/E, and non-magnetic - 1 Gs/E.
EFFECT: increased permissible peripheral speed of rotor rotation and increased utilisation ratio of electric machine.
5 cl, 2 dwg
SUBSTANCE: invention refers to the sphere of electrical engineering and electrical machinery industry and is of relevance for design and development of high-speed synchronous electrical machinery equipped with permanent magnets. Conceptually the invention consists in the process of the electrical machine rotor assembly envisaging an alternating pole magnetic system being mounted on the rotor shaft composed of tangentially magnetised permanent magnets (1) with the poles arranged between them. Under the method proposed the magnetic system consists of regularly alternating magnetic (2) and non-magnetic (3) O-plates with slots for insertion of permanent magnets (1). First the nonmagnetic plates (3) are fixed on the shaft being slipped on the axial pins (4) regularly alternating with the magnetic plates (3) whose outer diameter exceeds that of the magnetic plates. After that all the plates are tightly drawn together in the axial directions with the help of the remaining pins and the projecting edges of the magnetic pales (2) are turn-treated till the latter's outer diameter comes to equal that of the nonmagnetic plates (3); the treatment over, the permanent magnets are mounted.
EFFECT: facilitation of assembly and reduction of labour intensity.
3 cl, 2 dwg
SUBSTANCE: invention relates to electrical engineering and wind power, namely to wind power generators with vertical axis of rotation. Stator contains excitation sources, magnetic cores, work coil and bases with fasteners. The magnetic cores are made in form of top and bottom groups. Each group includes angle-bar which horizontal flange looks on the end gap of the rotor element, and vertical flange looks on first end of coil with permanent magnets. The second end of the coil with permanent magnets is connected with common vertical magnetic core.
EFFECT: efficiency improvement due to that not only radial by end gaps are also used.