Motor wheel for drive of vehicles
FIELD: engines and pumps.
SUBSTANCE: multi-pole synchronous electric motor with excitation from permanent magnets comprises a stator with even number of poles 2p, on the poles there is a winding made of one coil per pole, a salient-pole rotor with even number of poles, permanent magnets with tangential magnetisation are located on the rotor radially between poles, the salient-pole rotor with tangential magnetisation of poles is made with number of poles equal to the number of poles on the stator, and equal pitch between poles, pole tips of identical poles on the stator differ in their width from width of poles of the opposite polarity.
EFFECT: simplified design.
The technical field to which the invention relates.
The invention relates to electrical engineering, namely, electric motors for drive-wheel motor vehicles with a simultaneous reduction of speed.
The level of technology
Known multi-pole motors for the drive-wheel motor vehicles with a simultaneous reduction of the rotation frequency of the magnetic field containing the stator 2P salient poles with windings in the form of a coil on each pole, the rotor is placed on the poles of the permanent magnets with an even number of poles that differ by an even number of poles on the stator . Working magnetic flux generated by the windings of the stator of this motor is closed through air gaps between the stator poles and rotor, radially spaced permanent magnets, which leads to less efficient use of the energy of the working magnetic flux. Because the conductivity of the permanent magnet is equal to the conductivity of the air gap, a significant part of the magnetomotive forces of the windings of the stator is spent on overcoming the magnetic resistance of the section of magnetic circuit with permanent magnets and the air gap.
Also known multipolar synchronous electric motor with excitation from permanent magnets, with an even number field, the s 2P on the stator, at the poles placed winding consisting of a single coil on the pole, salient-pole rotor with an even number of poles different from the number of poles on the stator on an even number. Permanent magnets with tangential magnetization are located on the rotor radially between the poles . In creating the rotating moment in these engines simultaneously participate 2/3 of the total number of poles. To bring the rotation of the rotor of the electric motor in the design of the motor, you must have the sensor rotor position.
Similar multi-pole motors with excitation from permanent magnets on the stator with an even number of poles 2P, at the poles placed winding consisting of a single coil on the pole, salient-pole rotor with a posted permanent magnets with tangential magnetization with an even number of poles different from the number of poles on the stator on an even number, managed from the inverter described in [3 and 4]. In these motors torque also create no more than 2/3 of the total number of poles. In addition, to obtain a torque on the rotor, you must have the sensor position of the rotor relative to the stator poles.
The most close, essentially, the present invention is a multi-pole synchronous electrodes the tel with excitation from permanent magnets, on the stator with an even number of poles 2P, at the poles placed winding consisting of a single coil on the pole, salient-pole rotor with an even number of poles different from the number of poles on the stator on an even number. Permanent magnets with tangential magnetization are located on the rotor radially between the poles. To bring the rotation of the rotor of the electric motor in the design of the motor, you must have the sensor rotor position.
The aim of the invention is to increase the torque and to simplify the design of the motor.
Goal to increase the torque of the motor is achieved by the fact that salient-pole rotor with tangential magnetization of the poles made a number of poles equal to the number of poles on the stator, and equal spacing between poles, pole pieces like poles on the stator differ in their width from the width of the poles of the opposite polarity. This leads to the increase of simultaneously operating poles when creating torque, therefore, increase the torque of the rotor under other equal conditions with the prototype.
The goal of simplifying the design of the motor is achieved by the fact that to create a torque of the rotor of the electric motor simultaneously excited all the poles of the stator, and in alternating what I order. For continuous rotation of the rotor it is necessary to periodically change the polarity of the stator poles, i.e., to change the direction of the current in the coils of the stator winding. This is possible with the power of stator windings of an alternating current or a sequence of pulses of direct current of alternating polarity. Thus, there is no information about the position of the rotor relative to the stator poles, i.e., the position sensor rotor. This leads to simplification of the structure of the motor.
List of figures, drawings and other materials
The drawing shows a longitudinal section of the active part of the proposed motor.
Information confirming the possibility of carrying out the invention
The proposed motor (see drawing) contains the outer pole with an even number of poles of the cylindrical rotor housing 1 of a nonmagnetic material, the magnetic core 3 of the electrical steel or other magnetic material and the permanent magnet excitation system 2 tangential bias, placed between oppositely charged poles of the rotor. The stator is located inside the rotor concentric with and consists of a magnetic circuit of the electrical steel or other magnetic material 5 contains an equal number of salient poles of the rotor. At the poles of the stator hosted exchange rate is TKA stator 4 - one coil on the pole.
The electric motor operates as follows. The magnetic flux of permanent magnets is closed through the air gap between the stator and rotor magnetic circuit formed by the salient poles of the rotor and the stator, and the back of the magnetic rotor. Magnetic lines of force shown in the drawing. denoted by fPM. Under the action of magnetic forces of attraction of the rotor occupies the position shown in the drawing, a pair of poles N-S and a pair of poles on the stator have the same step. Thus, the rotor develops a certain braking torque. The rotor is set in motion when connecting the stator winding so that the coils on the poles of the stator, a magnetic field opposing the magnetic field of permanent magnets polarity, as shown in the drawing. The lines of force of this field is denoted by farticle. Thus the interaction of two magnetic fields causes a repulsive same field strength. Because of the magnetic asymmetry of the opposite poles this force has directed action. In the form shown in the drawing, if the force is directed clockwise. Created named forces torque causes the rotor to a rotary motion. Rotor poles change its position by moving one pole division. When powered stator winding by an alternating current or a pulse sequence is lsow DC variable polarity current in the windings of the stator changes its direction. Pole stator change its polarity and between the poles of the stator and rotor resurface repulsive forces prior to their move to one pole division. Thus formed electromagnetic torque acting on the rotor. When this occurs the reduction of the speed of rotation of the rotor: when changing the polarity of the magnetic field, the rotor is rotated one pole division. For complete rotation of the rotor it is necessary to change the polarity of the magnetic field of the stator is equal to the number of stator poles times.
Compared with other engines in the proposed all-pole rotor and stator act simultaneously and coherently, i.e., act in the same direction. This leads to the increase of the torque of the rotor.
In the proposed motor there is no need for information about the position of the rotor relative to the poles of the stator winding, as is customary when powered from the inverter. This leads to simplification of the structure of the motor.
1. Optimization design of low-speed brushless motor with two coils to drive the motor-wheel. J. "Electrical engineering", No. 12, 1999, pp. 6-13.
2. Multi-pole synchronous machine with fractional q<1 subcommi windings with excitation from permanent magnets. J. "Electrical engineering", No. 9, 2007, page 3-8.
3. RF patent №2181091. B 2002, No. 10.
4. RF patent №2278797. B 2006, No. 18.
Multi-pole synchronous motor with excitation from permanent magnets on the stator with an even number of poles 2P, at the poles placed winding consisting of a single coil on the pole, salient-pole rotor with an even number of poles, permanent magnets with tangential magnetization are located on the rotor radially between the poles, wherein the salient-pole rotor with tangential magnetization of the poles are made with a number of poles equal to the number of poles on the stator, and equal spacing between poles, pole pieces like poles on the stator different in width from the width of the poles of the opposite polarity.
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
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.
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
FIELD: electric engineering and electro-mechanical industry, in particular, synchronous generator plants with excitation from permanent magnets.
SUBSTANCE: synchronous generator plant has immovable carrying stator assembly with supporting bearings, on which ring-shaped magnetic duct is assembled with polar projections along periphery provided with electric coils positioned thereon with anchor winding of stator, and also ring-shaped rotor mounted on supporting shaft with possible rotation in aforementioned supporting bearings around immovable stator carrying assembly, with permanent excitation magnets mounted on inner side wall. Generator plant also has alternating current rectifier block, connected to anchor winding of ring-shaped stator magnetic duct. Carrying assembly of stator is made of two similar sections, each one of which has ring-shaped bushing with external abutment flange, and ring-shaped rotor is also made of two similar sections, each one of which has ring-shaped sidewall with inner abutment flange. Monolithic magnetic rings of powder-like magnetic-anisotropic material are rigidly mated with inner side cylindrical wall of ring-shaped sidewall of appropriate section belonging to ring-shaped rotor.
EFFECT: higher operational reliability, possibility of adjustment of alternating and direct current voltage as well as of value of alternating and direct current at the output of synchronous generator plant.
5 cl, 3 dwg
FIELD: electric engineering and electric-mechanical engineering, in particular, engineering of synchronous generators with excitation by permanent magnets.
SUBSTANCE: synchronous generator with excitation from permanent magnets contains bearing stator assembly with bearings 1,2,3,4, on which a group of circular-shaped magnetic ducts 5 is mounted with polar shelves along periphery, provided with electric coils 6 positioned on them with multi-phase anchor windings 7 and 8 of stator, a group of circular rotors 10 mounted on bearing shaft 9 with possible rotation in bearings 1,2,3,4 around carrying assembly of stator with magnetic inserts 11 mounted on internal side walls with magnetic poles of parallel-couples alternating in circular direction, enveloping polar shelves with electric coils 6 of anchoring windings 7,8 of circular magnetic duct of stator. Bearing assembly of stator is made of a group of similar modules. Modules of bearing assembly of stator are mounted with their possible rotation relatively to one another around axis coaxial to bearing shaft 9, and are provided with drive for their angular rotation relatively to one another connected to them, while phases of anchoring windings of same name of aforementioned modules are connected to each other, forming common phases of anchoring winding of stator.
EFFECT: expanded operation parameters of synchronous generator by providing possible adjustment of both its active power and output voltage of alternating current, and also providing for its possible use as source of welding current during electro-arc welding in different modes.
6 cl, 3 dwg
FIELD: electromechanical engineering; permanent-magnet excited synchronous generators primarily used as welding generators.
SUBSTANCE: proposed permanent-magnet excited synchronous generator primarily designed for producing desired DC current in electric-arc welding has frame carrying stator assembly with journal bearings that mounts stator magnetic circuit provided with m-phase stator armature winding electrically connected to m-phase power rectifier, as well as circular rotor mounted on supporting shaft for rotation in mentioned journal bearings about annular magnetic circuit of stator and provided with annular holder whose inner cylindrical side surface carries permanent field magnets forming annular magnetic insert in-between with p pole pairs alternating in circumferential direction; this insert encloses mentioned m-phase armature winding of stator annular magnetic circuit. Synchronous generator is provided with at least m saturable reactors, each incorporating power winding and control winding, as well as assembly regulating DC saturation current in saturable-reactor control windings. Annular magnetic insert is made in the form of group of similar monolithic annular magnets with poles assembled of p pairs alternating in circumferential direction and disposed on inner cylindrical side surface of annular rotor magnetic circuit holder; they are joined together at their butt-ends and form common stack wherein like-polarity magnetic poles circumferentially alternating in adjacent monolithic annular magnets are disposed congruently relative to one another in similar radial planes. Phase leads of stator annular magnetic-circuit m-phase winding are connected through power windings of respective saturable reactors to respective inputs of mentioned m-phase power rectifier.
EFFECT: extended range of generator operating variables and their regulation range, reduced mass and size.
11 cl, 7 dwg
FIELD: electric engineering, in particular - electric machines and electric drive.
SUBSTANCE: in electric machine, containing a rotor made of magneto-conductive material with constant magnet, polarity of which is alternated in tangential direction, and a stator, magnetic duct of which is made of magneto-conductive rings and longitudinal closing packets, and its windings are made of circular sections, distributed in axial direction and positioned between two adjacent magneto-conductive rings, in accordance to invention, control winding is positioned, consisting of sections, which are interconnected in such a way, that magnetization force signs of these sections alternate in tangential direction.
EFFECT: ensured control of output voltage amplitude, reduced vibrations and acoustic noise of the machine, and also reduced hazard of ignition of the machine in case of short circuit in windings.
FIELD: electric engineering, in particular, rotors of magneto-electric machines, primarily synchronous generators with excitation by constant magnets.
SUBSTANCE: the rotor for a magneto-electric machine contains circular clip of magnetic duct with stopping flange, which clip is rigidly coupled with supporting shaft. On internal side wall of the circular clip a circular magnetic insert is installed, formed by constant excitation magnets with magnetic poles alternating in circular direction. The internal side wall of circular clip of magnetic duct is made with a circular recess. The circular magnetic insert is made of a group of identical monolithic circular magnets with magnetic poles alternating in circular directions, which magnets are positioned in aforementioned circular recess on internal side wall of circular clip of magnetic duct and which are interconnected by their ends and a side wall of aforementioned circular recess. Magnetic poles of the same name, alternating in circular direction, in adjacent monolithic circular magnets, are positioned in congruent manner relatively to each other in same radial planes.
EFFECT: increased reliability in operation and expanded operation parameters due to increase of common magnetic flow during rotation and improved mass-dimensional characteristics.
3 cl, 2 dwg
FIELD: electric engineering, namely - electric machines with magnetic systems on constant magnets, possible use in compact power plants, electric propelling system motors of sea vessels, submarines with unique vibration-noise characteristics, compact constant current energy systems.
SUBSTANCE: in the modular gating electro-mechanical transformer, comprising n concentric hollow cylindrical stators (hereinafter - stators) with n m-phased windings positioned on their external electrically isolated cylindrical side surfaces, n concentric hollow cylindrical rotors (hereinafter - rotors), mounted with one of their bases on the internal end surface of carrier disk, connected to the shaft, mounted in bearings, one of which is positioned inside the body of electromechanical transformer, rotor position sensor, mechanically connected to the shaft, and also magnets, positioned on the side of internal cylindrical side surfaces of rotors, forming n tangential magnetic systems, positioned with radial gaps above m-phased windings of stators, in accordance to invention, each one of n tangential magnetic systems consists of pn parametric magnetic induction stabilizers in the gap between rotor and stator, installed on internal surface of rotor through nonmagnetic locating block and positioned serially along the circle of rotor facing each other with poles of the same name, which form poles of the tangential magnetic system, and has a common cylindrical magnetic conductor on stator, where each one of parametric stabilizers is made in form of tangentially magnetized rectangular prism of magnet with two symmetrically shaped polar caps tightly adjacent to its oppositely magnetized surfaces, aforementioned caps being made of laminated magnetically soft material, same as material of the common cylindrical magnetic conductor.
EFFECT: creation, for sea vessels and submarines, of a nominal row of electro-mechanical transformers with specific power for a unit of volume and weight being several times higher compared to existing ones, with small axial length, dimensions and weight, with weak reaction of magnetic system to load current and with rigid proportionality of torque to load current, and also with low pulsations of torque in terms of rotor rotation angle, making it possible to ensure unique vibration-noise characteristics of submarines.
10 cl, 5 dwg
FIELD: electrical engineering; electrical machines such as low-speed high-torque wheel motors for driving vehicles, elevators, for use as motor-car starting generators and low-speed generators for wind-electric and dam-free hydroelectric power plants, and the like.
SUBSTANCE: proposed synchronous electrical machine has stator carrying multiphase coil winding, each coil being disposed on separate tooth and all coils being cumulatively interconnected within coil groups; rotor inductor with alternate-polarity poles; coil number in each group λ = 3, 5, 7 ... which is negative integer odd number greater than or equal to 3. Novelty is that coils are assembled into groups so that stator tooth number Z, coil number λ in stator coil group, coil group number d per phase, and rotor pole pair number p are interrelated by definite equations.
EFFECT: enhanced efficiency, improved vibroacoustic characteristics, reduced manufacturing cost due to use of practically feasible stator winding.
8 cl, 2 dwg, 1 tbl
FIELD: electrical engineering; electrical machines that can be used as direct- or alternating-current motors and/or generators for industry and domestic appliances.
SUBSTANCE: proposed electrical machine of first design alternate has frame; power supply; magnetic inductor with shaft-mounted commutator and two shaft-mounted armatures provided with commutators and brushes and disposed coaxially in tandem; armatures are mounted in opposition at butt-ends of magnetic inductor; the latter is cylindrical in shape made in the form of alternating reverse-polarity permanent magnets and electromagnets with their poles facing the armatures. Electrical machine of second design alternate has frame; power supply; coaxially disposed magnetic inductor with commutator and armature with commutator and brushes around the latter, all mounted on their respective shafts; magnetic inductor is made in the form of alternating reverse-polarity permanent magnets and electromagnets abutting against each other , their poles facing the armature. Electrical machine of third design alternate has frame; power supply; magnetic inductor with commutator and armature with commutator and brushes coaxially disposed on their respective shafts; armature is mounted around magnetic inductor; the latter is assembled of two parts abutting against one another; one of these parts is built of one or more reverse-polarity permanent magnets and other one, of one or more reverse-polarity electromagnets, permanent-magnet and electromagnet poles facing the armature. Electrical machine of fourth design alternate has frame; power supply; magnetic inductor with commutator and two armatures with commutators and brushes, all mounted on their respective shafts; armatures are disposed in opposition on butt-ends of magnetic inductor; the latter is assembled of two parts abutting against one another; one of them is made of reverse-polarity permanent magnets and other part, of reverse-polarity electromagnets; permanent-magnet and electromagnet poles are facing respective armatures.
EFFECT: enhanced productivity effective use of active materials due to full utilization of permanent-magnet and electromagnet properties.
25 cl, 10 dwg
FIELD: electric engineering, specific features of realization of motors with constant magnets on rotor.
SUBSTANCE: on rotor of motor grooves (5) are provided for holding constant magnets (4), made in those parts of core (2A) of rotor, which correspond to sides of approximately regular polygon, having its center on the axis of core (2A) of rotor. Constant magnets (4) are inserted into corresponding grooves (5) for holding constant magnets (4). In the core (2A) of rotor four or more slits (6) are present, elongated in radial direction and distant from each other along each groove for holding constant magnets (4) on core (2A) outside grooves (5) for holding constant magnets (4), where, in accordance to the invention, on radially external end aforementioned slits (6) are positioned at approximately same distance from each other, while on radially internal end the distance between slits (6) is reduced with increase of distance from the center of each constant magnet, while distance between slits near the center is the largest.
EFFECT: usage of claimed highly efficient motor with constant magnets ensures reduction of reactive flow of anchor, improvement of magnetic flow distribution in external core, and, therefore, reduced noise and vibration.
6 cl, 11 dwg