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.
The invention relates to the field of electrical engineering and mainly can be used in the construction of electric machines, namely brushless motors and synchronous generators with excitation from permanent magnets.
Known magneto-electric motors and generators (Special electrical machines. Ed. by A. I. Martinova. - M.: Energoizdat, 1982, S. 251-254, 301-310), which contain a stator with a multiphase anchor winding and the rotor of the inductor, the magnetic flux which is generated by the permanent magnets.
The disadvantages of these known magneto-electric machines are relatively low dynamic and energetic performance, due to the difference of the volume of the inductor from the optimal value, providing a minimum mass and moment of inertia of the rotor when specified mechanical and external characteristics.
Known magnetoelectric machine (Adolescen N. P., Grashchenkov C. I., Ovchinnikov, I. E. and other Controlled brushless DC. - P.: Energoizdat, 1984, S. 35-40), which contain a stator with a multiphase anchor winding and the rotor-inductor with a fixed permanent magnets made with the smallest possible diameter.
The disadvantage of this known technical solution is a significant technological difficulties made the possible long rotor-coil with a small diameter, with a given mechanical rigidity. In addition, the limitation of the length of the rotor-inductor order to achieve the specified mechanical stiffness will lead to the restriction of its magnetic flux and increase the engine speed, which reduces the service life of the drives.
The closest in technical essence to the present invention is a known brushless motor (SU 1830174 A3, 1993), which contains a slotted laminated stator with a multiphase anchor winding with the magnetic sections and the rotor with grooves in which are placed permanent magnets forming alternating-pole system, and an active length L of the rotor and the diameter D of the rotor is selected from empirical relationships L/D=(3,2-3,6)(1,1+0,1 p)/p for p≤4, or L/D=(4,8-5,4)/p when p>4, where p is the number of pairs of poles.
These ratios were obtained by the inventors, which is the closest analogue, empirically and allowed to choose the ratio of active length L of the rotor and the diameter D of the rotor, which provides in comparison with the above analogues more efficient use of active materials by reducing the mass and volume of the rotor while maintaining a given mechanical characteristics of the electric machine.
However, further research of the authors of the present invention, which includes one of the authors of CL is Ichigo analogue, showed that increasing the efficiency of the active materials of the electric machine through a rational choice of the parameters characterizing the rotor design, have not been exhausted in the construction of the nearest equivalent.
Therefore, the disadvantages of the nearest analogue is not high enough dynamic and energetic performance, which is due to insufficiently rational choice of the volume of the rotor, which does not allow the minimum mass and moment of inertia of the rotor when specified mechanical and external characteristics.
The present invention is to improve the energy and dynamic characteristics of electric machines by improving the efficiency of active materials.
The problem is solved, according to the present invention, so that the electric machine, comprising, in accordance with the closest analogue to the groove laminated stator with a multiphase anchor winding and a rotor with grooves in which are placed permanent magnets forming alternating-pole system differs from the closest analogue of the fact that the active length L of the rotor is chosen equal to (2,8-3,1)τ, where τ is the pole division of the rotor.
The active length L of the rotor is equal to from 2.8 to 3.1 magnitude pole division τ rotor, allows to improve the energy and the dynamic range is their characteristics electrical machines by increasing the efficiency of the use of active materials, because it provides an increase in the number of turns of the phase anchor winding for a given length of magnet wire that defines the specified anchor resistance of the winding, by minimizing the average length of its orbit. By increasing the number of turns of the anchor winding phases is increased magnetomotive force of the armature of the motor, or the electromotive force of the armature of the generator, which is ensured by increasing the efficiency of active materials.
Specified the required ratio between the amount of the active length L of the rotor and the pole is dividing τ of the rotor obtained by the authors of the present invention empirically. In the case of selecting the active length L of the rotor outside of the specified range of values not provided a significant decrease in the average length of a coil and, thus, a substantial increase in the number of turns of the anchor winding phase, which prevents the achievement of the technical result.
The drawing shows a cross-section of the inventive electric machine, where 1 is the stator, 2 - magnetic core of the stator, 3 - armature winding, 4 - rotor 5 - permanent magnets and 6 magnetic poles.
An electric machine includes a stator 1 with the magnetic core 2 of the stator made of laminated electrical steel. In the slots of the magnetic core 2 of the stator laid corneometry 3. The electric machine also includes a rotor 4 mounted inside the stator 1 and containing permanent magnets 5 and the soft magnetic poles 6 and the permanent magnets 5 adjacent to the magnetic poles 6 its poles with the same magnetization.
In the case of using the electric machine as a motor flowing in the armature winding 3 electric current creates a magnetic core 2 of the stator 1 magnetic flux, which, through the air gap between the stator 1 and the rotor 4 interacts with the magnetic flux of permanent magnets 5, causing rotation of the rotor 4.
In the case of using the electric machine as a generator resulting from rotation of the rotor 4 alternating magnetic flux generated by the permanent magnets 5, induces in the armature winding 3 electromotive force.
To illustrate the efficiency of the active material through the present invention, consider an example in which we compare the two motor with the same number p of pairs of poles. Let the first electric motor provided with a rotor having a diameter of D1and the active length L1=3τ1(according to the present invention), where τ1pole division of the rotor of the first motor, τ1=πD1/(2p), and the second electric motor provided with a rotor having D 2=0,85 D1and the active length L2=6τ1.
As is known, the values of the starting torque and the angular speed under ideal no-load operation of the motor, respectively, are determined by the expressions MP=CMU/RFand ΩX=-U/SEwhereMand CEthe coefficients of time and electromotive force, respectively, WithM=CE=KAboutwFF; U - supply voltage; RFthe resistance of the phase winding of the stator, RF=ρlwwF/q;About- winding ratio; wF- number of turns in the winding phase; f is the magnetic flux in the air gap for a couple of poles; ρ is the specific resistance of the winding wire; q - section winding wire; lw- the average length of a coil winding, lw=2D(L/D+πKw/(2p)); D - diameter of the rotor; Kw- coefficient depending on a winding structure.
From the above expressions it follows that to obtain the same values of the starting torque and the angular speed under ideal no-load operation of the first and second electric motors need the condition wF1F1=wF2F2(1)where wF1and wF2the number of coils in the winding phases of the first and second motors, respectively; f1and f2magnetic fluxes in the air gap for a couple of poles of the first and second electro is the motors, respectively.
Magnetic poles of the first and second motors are determined by the expressions f1=BS1and f2=BS2, where B is the magnetic induction in the air gap, adopted the same for both motors; S1and S2square poles first and second motors, respectively,
Since τ2=πD2/(2p) and D2=0,85 D1then
Then the average length of the coil windings of the first and second motors have values of lw1=2L1+2τ1=6τ1+2τ1=8τ1and lw2=2L2+2τ2=12τ1+1,7 τ1=13,7 τ1,, respectively.
As a result, the number of turns in the winding f is s first electric motor is equal to w F1=qRF/(ρlw1)=qRF/(8τ1ρ), and the number of turns in the winding phase of the second electric motor is equal to wF2=qRF/(ρlw2)=qRF/(13,7 τ1ρ).
Thus, condition (1) is almost done and the values of starting torque MPand angular frequency ΩXrotation when IDA is flax idle first and second motors are practically identical.
However, the volume of the rotors of the first and second electric motors is equal to
Therefore, the first electric motor at a much lower active length L1=3τ1rotor, selected in accordance with the present invention, and slightly larger its diameter D1compared with the second motor, the rotor of which has a diameter of D2=0,85 D1and the active length L2=6τ1, characterized by the displacement of the rotor of the V1with a value of approximately 1.5 times less than the amount of rotor V2second motor. This energetic and dynamic characteristics of the first and second electric motors are almost the same.
Thus, the present invention provides improved energy and dynamic Hara, the characteristics of electrical machines by improving the efficiency of active materials.
Electrical machine containing groove laminated stator with a multiphase anchor winding and a rotor with grooves in which are placed permanent magnets forming alternating-pole system, characterized in that the active length L of the rotor is chosen equal to (2,8-3,1)τ, where τ is the pole division of the rotor.
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.
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: invention relates to the field of electric engineering and may be used in electric pumps with permanent magnets on the rotor. The rotor core for electric motor comprises a variety of poles. Each pole consists of a pair of the first permanent magnets placed as V-shaped assembly open in direction of the outer peripheral side and the second permanent magnet placed in parallel to circumferential direction towards the open part of the V-shaped assembly, at that polarity is changed in sequence. The groove is shaped so that the groove centre is in the range between electric angle position shifted per 1/4 of the harmonic component cycle of voltage induced in direction of d-axis and electric angle position shifted per 1/8 of the harmonic component cycle in direction of q-axis from the basic point placed between the line connecting an angular part of the second permanent magnet at the outer peripheral side of the rotor and the rotor shaft centre and q-axis out of the variety of separating lines, which connect the variety of separating points set within the range of electric angle corresponding to one cycle of the harmonic component from d-axis up to q-axis at the outer periphery of the rotor core and the rotor shaft centre.
EFFECT: reducing losses in steel.
6 cl, 10 dwg
SUBSTANCE: brushless two-rotor direct current motor comprises rotating magnetised deperm rotors with actuating coils and fixed toroid stator with operating winding on it. The actuating coils are fixed at the stator. The rotors are placed by like magnetic poles respectively from the side of inner and outer surfaces of the toroid stator thud forming two cylindrical magnet gaps, inside these gaps there are non-magnet cylinders adjoining the toroid stator and the operating coil of the toroid stator is wound on the above non-magnet cylinders while its turns pass through openings in the toroid stator. The respective half-turns of the operating coil are placed in direct vicinity from cylindrical surfaces of the rotating rotors. The actuating coils of the rotors and the operating coil are connected in series or in parallel to the direct current source. Two independent magnet circuits formed by the rotors and toroid stator are closed through magnetically conductive washers coupled magnetically to the rotors and fixed to magnetically conductive walls of the stator with minimum permitted gaps. Thickness of walls of the non-magnet cylinders is selected so that it is five-ten times bigger than the gap between conductors of the working winding and cylindrical surfaces of the rotors.
EFFECT: increasing energy efficiency, reliability and durability.
FIELD: machine building.
SUBSTANCE: lock member preventing fastening nuts from self-unscrewing at the deformation and vibration of a core is installed at the threaded ends of longitudinal keybars of the core behind the end plates under the fastening nuts. The element comprises a thin-walled ring with the outer diameter being greater than the fastening nut diameter, its protruding part is folded onto the edge of the fastening nut. The ring body is fitted by a local protrusion and a locking "socket" in the end plate under the fastening nut with the protrusion being set in the "socket". The ring is mounted behind the fastening nut, is increased by its thickness at least up to the half of the fastening nut thickness. The ring is also fitted by a local protrusion at the end face on the side of the hole eccentricity and on the side turned to the fastening nut. The area of the protrusion amounts to 1/4 of the area of the cut-off ring on the side turned to the fastening nut by oval grooves with designed depth outside along the side surface symmetrically to the slot. The ring is also fitted by two passage holes and a clamping bolt with a nut and a lock washer.
EFFECT: improved clamping of keybar thread without increase of a lock member size, its improved reliability and fabricability.
4 cl, 6 dwg
SUBSTANCE: invention relates to electrical machines, namely to noncontact synchronous generators of inductor type operating mainly with rectifying load, used, for example, in generating units of motor-and-tractor machinery. The invention is aimed at overcoming of impossibility to use as the base the widely widespread and reliable asynchronous machines with a square-cage rotor. It is achieved by that the inductor machine, containing front, back covers, stator with a working winding, source of excitation, rotor with the shaft, according to the invention is equipped with a ferromagnetic sprocket with a central hole, the sprocket is located between a source of excitation and non-magnetic insert, which is attached to a cover, and each teeth of the star has threaded hole from the side part with fastened closing elements with a chamfer coupled connected with the stator.
EFFECT: use of the given structure allows on the basis of the initial asynchronous machine by adding of the source of excitation and details of the magnetic circuit to obtain the synchronous inductor machine, which has such a positive feature, that EMF is generated by the rotation speeds of the shaft from low up to rated one, while for operation in the mode of induction generator it is required to provide the rotor rotation higher than the rated speed.
SUBSTANCE: invention relates to electrical machines, namely to noncontact synchronous generators of inductor type operating mainly with rectifying load, used, for example, in generating units of motor-and-tractor machinery. The invention is aimed at overcoming of impossibility to use as the base the widely widespread and reliable asynchronous machines with a square-cage rotor. It is achieved by that the inductor electrical machine containing front, back covers, stator with the working winding, source of excitation, rotor with the shaft, according to the invention is equipped with a ferromagnetic ring, closing devices, magnetic circuit of sprocket type with a hole and non-magnetic insert, and the ferromagnetic ring is installed by the first side part in external, with reference to frontal parts, zone of the stator closely, from the other side of ferromagnetic ring the closing elements are installed which are connected to the sprocket teeth using the slot and clamp.
EFFECT: use of the given structure allows on the basis of the initial asynchronous machine by adding of a source of excitation and details of magnetic circuit obtaining a synchronous inductor electrical machine, which has such a positive feature, that EMF is generated by the rotation speeds of the shaft from low up to rated one, while for operation in the mode of induction generator it is required to provide the rotor rotation higher than the rated speed.
SUBSTANCE: invention relates to electric engineering and wind power engineering and can be used in power production devices. Technical result achieved by using the present invention consists in the improvement of operational characteristics of a wind electric generator due to the reduction of its weight. The above technical result is achieved due to the fact that according to the present invention in the induction-type wind electric generator comprising a shaft, a toothed rotor and a modular two-pack stator, each of the stator pack modules is made as an excitation source on which vertical sides of L-shaped yokes are symmetrically set while cores with coils are installed on the horizontal sides.
EFFECT: technical and economical advantage of the wind electric generator also consists in the fact that its upper and lower stators are identical which provides for better unification and manufacturability of the device.
SUBSTANCE: invention relates to electric engineering, in particular, to electric machines. Technical result is achieved due to the fact that the design of the proposed machine involves an auxiliary motor with special excitation which undertakes part of load at the machine operation. First of all, the above is concerned with the fact that no back EMF (of currents) will be induced in the windings of its stator and rotor. Direct and return active wires of the windings of the respective anchors in the main generator and in the special exciter are laid in the grooves of respective magnetic conductors so that the pairs of positive and negative half-waves of the anchor currents in the main generator and in the special exciter which are induced in the operating mode are shifted by phase by 45°. The direct and return active wires of the main generator anchor winding are laid in the opposite grooves of the generator magnetic conductor in series and are a solid winding. The active wires of the movable armature in the special exciter are laid in the same way. Windings of all four salient electromagnetic poles of the auxiliary motor stator are coupled to each other in series and every adjacent ones are wound in opposite directions. The rotor windings are wound and connected in the same way.
EFFECT: significant improvement of start-up, adjustment characteristics as well as increased efficiency.
SUBSTANCE: invention is related to the sphere of electric engineering, in particular, to electromagnetic motors, and may be used for impulse devices with reciprocating motion of actuators. The suggested electromagnetic motor comprises a cylindrical magnet core consisting of a case, plunger and a flange connecting them, a winding placed at the plunger and a flat and direct external armature with circular ferromagnetic shunt. In a longitudinal channel of the above plunger there is a spring with a guide pin capable of axial motion; the pin is fixed rigidly to the flat and direct armature. According to the first version of this invention along length of outer and inner diameter of the circular ferromagnetic shunt there are collars with a pitch equal to a pitch of the corresponding coupled collars formed at outer diameter of the plunger and inner diameter of the case respectively. According to the second version in the suggested electromagnetic motor collars are made along length of inner diameter of the circular ferromagnetic shunt and coupled by diameter to the corresponding collars formed at outer diameter of the plunger. According to the third version in the suggested electromagnetic motor collars are made along length of outer diameter of the circular ferromagnetic shunt and coupled by diameter to the corresponding collars formed at inner diameter of the case. In any version of the electromagnetic motor the above collars form the toothed area of the magnet system.
EFFECT: increase of their reliability ensured by elimination of impact at the end of operating stroke between the flat and direct armature and the case of magnet core notwithstanding duration of voltage pulse supply to the winding and time of the armature motion.
3 cl, 3 dwg
SUBSTANCE: invention relates to the sphere of electric engineering, to electrical machines with magnets on a stator, and can be used in electrical drives of machines and mechanisms, as well as in electrical power generators. The brushless machine comprises a rotor with a shaft and at least one gear ring on it with teeth placed around the gap circle. The stator comprises a toothed magnet core, a winding, which coils are placed to grooves of the stator magnet core. The multipole magnet system is made of hard-magnetic material and placed between the rotor and stator magnet core, fixed at the stator and magnetised so that at surfaces of the stator teeth faced towards the gap there is an equal quantity of alternating opposite poles along rotation direction of the rotor. The stator is made as a body of rotation with several teeth placed along the rotor axis of rotation. Each coil of the winding is placed to one stator groove. Over each stator tooth there are only teeth of one toothed fragment of the rotor. The number of teeth at each gear ring is equal to a half of poles placed at one stator tooth.
EFFECT: increase of the electric machine specific power and reduction of active material weight.
18 cl, 13 dwg
FIELD: power engineering.
SUBSTANCE: invention relates to wind power engineering, particularly, to segmented stators of windmills. Windmill stator comprises magnetic cores, excitation system, coupling elements and winding. In compliance with this invention, stator is composed of "Ш"-like magnetic core with excitation sources secured to its lateral walls by coupling elements. Note here that winding is fitted on mid rod of "Ш"-like magnetic core.
EFFECT: simplified design, lower costs.
FIELD: electrical engineering; mechanical design of commutatorless magnetoelectric machines.
SUBSTANCE: rotor magnetic system has more than two magnetically permeable steel laminations with pole horns formed by prismatic tangentially magnetized N-S permanent magnets placed inside laminated stack; inner and outer diameters of laminations are uninterrupted and rectangular prismatic magnets are installed inside them so that distance over outer arc between external planes of two adjacent magnets of unlike-polarity poles is shorter than that over internal arc between same planes; magnets do not contact one another and have at least one projection on inner diameter for coupling with rotor shaft.
EFFECT: enhanced manufacturability.
3 cl, 2 dwg