Rotor of synchronous nonsalient-pole electric machine
SUBSTANCE: rotor, in particular, of a turbogenerator comprises a winding made of coils (1) from current-conducting strands with turns covering a pole and laid into slots (2), at the same time, according to the invention, each coil (1) has concentric arrangement of turns placed in one layer in all slots (2), related to the pole division of the rotor. This invention is especially relevant for synchronous nonsalient-pole electric machines with air cooling.
EFFECT: higher capacity of a synchronous nonsalient-pole electric machine without variation of its rotor dimensions.
2 cl, 3 dwg
The proposed solution relates to the field of electrical engineering and for the design of the rotor of the synchronous neravnodushnogo generator, in particular a turbo-generator with large power.
Known rotor pavlopoulou electrical machines  with the winding, the coils of which are arranged concentrically on the pole. The installation in the slots start with a coil of larger size, and then fixed on the barrel of the rotor adjacent to the reel teeth. Next turn set coil smaller and fix them like the first. The coils are connected, and under the lower turn of the last coil appears "false" level.
For the prototype accepted design of the rotor of the synchronous pavlopoulou electrical machines - turbo-generator , placed in the grooves of the barrel of the rotor winding coil type. Coils coils are arranged in the column and occupy two slots one slot division. Coils are concentric about the axis of the large tooth and interconnected, while the design also has a "wrong" turn.
A common disadvantage of known solutions is that powerful machines cross-section of the coil is large, and the presence of "false" loop under the lower turn of the last coil leads to a significant decrease of the cross section of the ventilation channel between the rotor shaft and the lower is her surface coils. This is due to the deterioration of the cooling of the rotor of the electric machine by reducing the cooling flow entering the active part of the rotor. This reduces the unit power of the electric machine. This problem is most acute in relation to machines with air-cooled high power.
The task of the technical solution is to increase the power of the electric machine without changing the dimensions of the rotor.
The problem is solved due to the fact that the rotor of the synchronous pavlopoulou electrical machine containing the winding, made in the form of coils of conductive wires from the coils, covering the pole and laid in the grooves, each coil has a concentric arrangement of coils placed in a single layer in the grooves relating to the pole division. The conductors in the cross-section may have an elongated shape and are oriented side larger along the radial axis of the groove.
The prior art is not revealed placement of coils each coil in a single layer in all the slots of the same pole division.
The technical solution is illustrated in the drawings, in which figure 1 presents a fragment of the rotor of the turbogenerator with accommodation on the first pole coil winding, figure 2 is a fragment of the rotor with subsequent placement of the coils in figure 3 - fragment And 2.
The rotor (see IG) turbine generator includes a coil, consisting of coils 1. Each coil 1 consists of conductors (conductive wires)laid in one layer in all the grooves 2, are related to the pole division of the rotor. The conductor is oriented party larger along the radial axis of the groove. The number of polevikov each coil 1 is equal to the number of grooves pole division. The coils of the coil 1 are concentric about the axis of the large tooth 3. Each subsequent coil 1 is located on the previous coil 1 in a single layer in all the slots 2 (see figure 2). Between the shaft 4 of the rotor and the bottom surface of the first coil 1 has an axial air channel (in the drawing position is not marked, the arrow shows the direction of coolant flow). The connection of the coils 2 between them carried out by soldering using an intermediate conductive element 5 (Fig 3).
No acting axial vent "false" loop facilitates the efficient ventilation of the rotor of the electric machine, which is especially important for machines of large capacity.
Technical efficiency of the invention consists in the possibility of increasing the power of the electric machine without increasing its size.
Sources of information
1. Patent RU 2248658, firm NGO Les, NC 15/09, NC 3/51, priority dated 22.08.2003, publication 20.03.2005.
2. Patent GB 2470107, General Electric company, H02K 1/32, NC 9/00, à priori the et from 05.05.2009, publication 10.11.2010.
1. The rotor of the synchronous pavlopoulou electrical machine containing the winding, made in the form of coils of conductive wires from the coils, covering the pole and laid in the grooves, wherein each coil has a concentric arrangement of coils placed in a single layer in all the slots that are related to the pole division.
2. The rotor of the synchronous pavlopoulou electric machine according to claim 1, characterized in that the conductors have a cross-section elongated shape and are oriented side larger along the radial axis of the groove.
SUBSTANCE: odd coils (1) and even coils (2) of a winding are arranged on cogs without crowns (3) of a stator with a back (4). Due to arrangement of even coils with external surfaces on an active length in the form of planes parallel to axes of their cogs, and odd coils - with external surfaces on an active length in the form of planes parallel to axes of the adjacent cogs, the electric machine stator winding is produced, making it possible to fully use a cog-to-cog space of the stator and to reduce capacity of losses in the stator winding at the same MMF, preserving at the same time the possibility of separate winding of coils and their subsequent installation on cogs, which increases manufacturability of stator winding manufacturing and increases repairability.
EFFECT: increased area of coils cross section and reduced capacity of losses in them with preservation of MMF, higher manufacturability of a stator winding.
SUBSTANCE: electromechanical converter comprises at least one stator-rotor pair, where a stator comprises cores from material with high magnetic permeability, with their ends attached to a support stator ring and aligned in parallel to the main magnetic flow, and between which there are conductors of a multiphase winding, a rotor is made in the form of two coaxially arranged outer and inner inducers - magnetic conductors from material with high magnetic permeability in the form of hollow cylinders fixed as capable of rotation relative to the stator, bearing poles arranged along circumferences with alternating polarity, inverted to the stator via working gaps and covering it, at the same time polarity of poles arranged on the inner and outer inducers opposite to each other is arranged as matching, and number p of pole pairs and number Z of stator cores are related by certain ratios for a double-phase winding (m = 2) and for a triple-phase winding (m = 3).
EFFECT: expanded field of application of an electromechanical converter, simplification of its design with simultaneous increase in accuracy of stator winding phase switching moments, lower requirement to sensitivity of used sensors of rotor angular position and their stability, provision of more accurate moments of phases switching and simplified control operations in production and diagnostics of the converter.
10 cl, 2 dwg
SUBSTANCE: bar wave winding of stator of asynchronous motor is single-layer, and winding bars are solid; at that, height of bar hb, which is determined using the equations for damping factor kd and relative current displacement factor ξ, which are calculated at maximum frequency value f of supply voltage on condition that damping factor kd is at least by two times more than the value of the required control range of rotation frequency of asynchronous motor.
EFFECT: enlarging the control range of rotation frequency of asynchronous motor owing to increasing its maximum moment at increase of supply voltage frequency, as well as simplifying the design of bar wave winding owing to its single-layer design at one bar in each slot, which allows considerably reducing labour intensity for manufacture of asynchronous motor and reducing the sizes of front parts of winding.
2 cl, 3 dwg
SUBSTANCE: in AC electric machine, comprising rotor and stator with winding arranged in it and made of K coils, it is suggested to install coils in stator winding so that central angle α1 between axes of cross sections of sides of each coil, determining width of coil, equals α1=(360°+60°·m)/2K; number of coils K is determined by ratio K=(1+m/6)·p, where m - number of phases, p - number of pole pairs of magnetic field, at the same time p is multiple of three for m = 2 and is multiple of two for m = 3.
EFFECT: increased torque and reduction of its pulsations, reduced losses of power in electric machine by development of magnetic flow by stator, acting at all poles of rotor with forces of one direction and having one fixed number of poles, equal to number of rotor poles.
3 cl, 4 dwg
SUBSTANCE: proposed drive is arranged with stator (1) from several segments when looked at in direction of perimeter (3, 4, 5, 6), which accordingly have closed circuit of winding connection, and rotor made of segments, which are on jointly rotating facilities and there electromagnetically interact with system of stator winding (1).
EFFECT: simplified assembly of direct drive for powerful drives on driving plant, when there is no necessity to provide insulations on winding of this drive stator.
5 cl, 3 dwg
FIELD: electrical engineering.
SUBSTANCE: according to suggested method of wave windings installation every section (70) of phase winding is formed as sequence of teeth (71) with two side branches (711) for installation into setting position in the groove, sections of winding (70) are placed onto mounting tool (80), turns (73) are laid into stator grooves in the order that is reverse to order of winding, at that sections (70) of winding are simultaneously laid around mounting tool (80), at that turns (73) that follow one another in preset order of winding are related alternately to different sections (70) of winding, which may be arranged as simple wave or distributed wave. Also stator of multi-phase rotating machine is suggested, which contains laminated packet (10) with central opening and axial slots (30), which are provided on the internal side on radial surface of laminated packet (10), in which wave winding is installed, which is laid into stator slots according to suggested method.
EFFECT: increase of power.
18 cl, 16 dwg
SUBSTANCE: invention is attributed to the field of electric engineering and concerns execution particularities of coil windings for stators or rotors of electric machines with inside-open slots. Substance of invention consists in manufacturing of coil winding for stators or rotors where each coil turn with corresponding jumper wire (14) lays in two stator or rotor slots respectively and both jumper wires (14) are connected by frontal part (16) of winding protruding out of stator or rotor butt-end surface. At that simultaneously several coils are made by means of n parallel wires (10) winding on rotating pattern. To obtain smaller frontal winding parts, the jumper (14) and the frontal part (16) is alternatively created of each of parallel wires (10) on pattern (20) in the first working stage A. After that in working stage B, created jumpers (14) and wire guide are shifted together with one of the ends of these frontal parts (16) by means of axial moving of pattern (20). After multiple repetitions of working stages A and B, jumpers (14) are created for the last n stator slots. After that winding is removed from the pattern, flat-squeesed, put into coil receiver in the form of strip plate, then shift to open in radial direction slots of transfer tool and squeese out of them in radial direction outside into stator or rotor slots. Also device is suggested for manufacturing of stator or rotor with these windings.
EFFECT: providing of narrow in radial direction structure of winding frontal parts for certain cross-sections of wire in stator or rotor slot cross-section irrespective to winding insertion into rotor or stator method.
21 cl, 19 dwg
FIELD: electric engineering and electro-mechanical industry, namely, windings of electric machines.
SUBSTANCE: winding of electric machine, consisting of rigid coils, is made of rectangular cross-section wire and has groove and frontal parts. In accordance to the invention, each rod of winding during transition from groove part to frontal part and backwards is twice bent along the line passing at an angle of 45 degrees to longitudinal axis of wide side of rod, and frontal parts of coils of different phases of winding are positioned one after the other along the rotation axis of machine and bent along a circle.
EFFECT: ensured minimal possible overhang of frontal parts of winding coils due to their radial positioning, and also due to simplified manufacturing technology of coil and reduced fault probability of winding isolation due to the fact that rods are bent along their wide side.
FIELD: electrical engineering; coil windings for low- and medium-power electrical machines.
SUBSTANCE: proposed double-layer three-phase stator coil winding is disposed in three-level slots of two-pole electrical machine, their depth complying with triple height of one of coils placed therein, and in two-level slots whose depth corresponds to double height of one of coils placed in them; number of three-level slots equals that of two-level ones; mentioned slots are alternating so that group of three-level slots equal to number of slots per pole per phase is followed by group of two-level slots equal to number of slots per pole per phase; phase bands of winding formed by some coil sides coincide with those of coils disposed at third (bottom) level of three-level slot groups and at first (top) level of two-level slot groups; other coil sides of all coils characterized by reduced winding pitch are disposed at intermediate (second) layer of three- and two-level slots. Proposed design provides for balancing resistances of all winding phases and makes it possible to avoid lifting of great number of coil sides at a time which is independent of winding pitch reduction and will equal number of slots per pole per phase q.
EFFECT: facilitated placement of coil sides in slots.
FIELD: electrical and electromechanical engineering; stators for large machines such as turboalternators.
SUBSTANCE: proposed stator has double-layer, three-level three-phase coil winding and core half of whose slots accommodate upper- and intermediate-level windings and other half of slots receive lower- and intermediate-level windings. Two-pole electrical machine stator of first design alternate has triple-level double-layer three-phase coil winding and core half of whose slots accommodate upper- and intermediate-level windings while lower- and intermediate-level windings are placed in other half of slots; stator core is built of laminated active-steel segments; depth of all core slots corresponds to total height of three levels; insulating shims are installed in bottom of slots accommodating upper- and lower-level windings and in top part of slots accommodating lower- and intermediate-level windings. Winding of second design alternate has three-level double-layer three-phase coil winding and core half of whose slots accommodate upper- and intermediate-level windings while lower- and intermediate-level windings are placed in other half of slots; stator core is made of laminated active steel segments; depth of all core slots corresponds to total height of three winding levels; auxiliary windings are placed in bottom of slots accommodating upper- and intermediate-level windings and in top part of slots accommodating low- and intermediate-level windings.
EFFECT: facilitated process of placing winding in slots of stator core manufactured from laminated segments.
4 cl, 5 dwg
SUBSTANCE: in a magnetoelectric generator, the rotor of which comprises a disc (1) fixed on a shaft, and on the disc there is a ring-shaped row of permanent magnets (2) with alternating polarity, arranged as equidistant relative to each other, and the stator comprises two parallel plates (3,4), between which there are windings, besides, stator windings are arranged on U-shaped cores from electrotechnical steel, which are fixed on plates (3, 4) of the stator, width Bc of the end of the U-shaped core (6) makes a half of the width B of the permanent magnet (2) of the rotor, besides, ends of the U-shaped cores (6) of one plate (3) face the ends of the U-shaped cores (6) of the other plate (4) and are displaced relative to them by the distance equal to the half of the width of the permanent magnet (2) of the rotor, besides, the permanent magnets (2) of the rotor are arranged between opposite ends of U-shaped cores (6) of the stator.
EFFECT: reduced magnet resistance in a magnetic circuit, increased intensity of magnetic field, electromotive force induced in stator windings, and a coefficient of generator efficiency.
SUBSTANCE: stator for electrodynamic machines comprises a coil, providing for the possibility to generate ampere-turns ("AT") of a magnetic flow. A coil comprises a foil conductor, comprising a section of foil conductor displacement, configured as capable of displacing sections of the foil conductor and an element of an excitation pole having multiple zones. Sections of the foil conductor are arranged on the element of the excitation pole, which comprises the first and second zones. The first section of the foil conductor is arranged on the first zone, and the second one - on the second zone. A section of foil conductor displacement connects the first section of the foil conductor with the second section of the foil conductor. A version of a foil coil is proposed, with an excitation pole having a surface to oppositely install conical magnets, for instance.
EFFECT: optimised generation of a magnetic flow and improved technology of stator coils making.
23 cl, 20 dwg
SUBSTANCE: invention is related to electric engineering, in particular, to electric DC machines. The proposed stabilised axial DC generator comprises a body, a pilot exciter, an exciter and the main generator, in which an inner magnetic conductor, a side magnetic conductor with one active end surface and a side magnetic conductor with two active end surfaces are arranged as axial. At the same time, according to this invention, into slots of the side axial magnetic conductor with two active end surfaces at the side of the inner axial magnetic conductor there is an additional winding of excitation exciter, and in the lower part of the generator body there is a voltage controller comprising a metre of voltage deviations, a preliminary amplifier, a unit of power amplification and a power part. The metre of voltage deviations is connected to the output voltage of the generator, and the additional winding of the excitation exciter is connected to a power part of the voltage controller.
EFFECT: expanded area of application of a generator due to stabilisation of output voltage.
SUBSTANCE: invention is referred to electric engineering and power engineering, in particular, to electromagnetic motors. The electromagnetic motor comprises a rotor arranged in the form of a shaft installed as capable of rotation of at least two discs installed on the shaft, with permanent magnets arranged along their periphery, a stator comprising electromagnets installed as capable of interaction with permanent magnets, besides, the permanent magnets are arranged in the form of cylinders, planes of ends of which are located in the radial plane of each disc, besides, permanent magnets of the first and second discs face each other with poles, and the stator comprises electromagnets in the form of solenoids without magnetic conductors installed between discs of the rotor, two start-up electromagnets, comprising non-linked magnetic conductors and installed oppositely to a permanent magnet, of any of rotor discs, a contactless induction switch installed on the stator opposite to any of permanent magnets of rotor discs with the possibility of interaction with each of permanent magnets arranged on one of rotary discs of the rotor, at the moment of permanent magnet passing through a zone of sensitivity of a sensor part of the contactless induction switch.
EFFECT: increased capacity of a motor.
SUBSTANCE: invention describes direct rotation generator that includes holder of iron cores and rotating shaft arranged on holder of iron cores. The first and the second rotating discs are located on two corresponding ends of rotating shaft. The first iron core is located on holder of iron cores, and the first winding is located at the periphery of holder of iron cores. The first sealing plate is located on the first rotating disc; the first magnet is located on the first rotating disc or on the first sealing plate, and surface of the first magnet and surface of the first sealing plate share one surface. The fourth magnet is located on the second rotating disc. The first magnet and the fourth magnet correspond to two ends of the first iron core, and poles of the first and the fourth magnets, which face each other, are opposite. One end of the first iron core includes liquid tank that is filled with magnetic liquid; at that, end of the first iron core, which is filled with magnetic liquid, contacts the first sealing plate. The main magnetic flux of direct rotation generator and magnetic flux created with induced current are horizontal and parallel to iron core, which considerably reduces the impact of resistance on rotation of iron core and magnets.
EFFECT: saving of energy for generation of electric energy and increase in generator efficiency.
10 cl, 5 dwg
SUBSTANCE: in single-phase electric motor containing rotor and stator with the main and auxiliary poles with pole tips and windings offset relative to each other through the half of pole division of the system, along the axes of poles of the main phase and in stator yoke adjacent to them and in pole tips there made are non-magnetic through gaps; stator yoke is one and the same for both systems of poles, and poles of auxiliary phase and stator yoke and pole tips, which are adjacent to them, are one-piece. According to the invention, non-magnetic gaps of poles of the main phase, stator yoke adjacent to them and pole tips are made with formation of saturation bridges in the area or poles of the main phase, or stator yoke adjacent to them, or pole tips, or simultaneously in the area of stator yoke and pole tips.
EFFECT: simpler manufacturing procedure of single-phase asynchronous motor with auxiliary winding and increased starting torque.
SUBSTANCE: invention relates to the field of electric engineering and may be used in an automated electric drive and systems of automatics. In the proposed inverted valve motor, comprising a stator with an m-phase winding and a rotor comprising an external bushing and permanent magnets, according to the invention, a stator is installed inside the motor, and a rotor comprises an external bushing, on the inner surface of which there is a magnetic system made of 12 pre-magnetised and cut elements, besides, the magnetisation angle of each segment is identified in accordance with the following formula: αSn= 90°(N - 1), where N-an order number of a segment in a shell, the number of pairs in poles of the rotor magnetic field complies with the number of pairs of the stator winding poles.
EFFECT: technical result achieved by this invention consists in increased power and dynamic characteristics of inverted valve motors (IVM).
2 cl, 6 dwg
SUBSTANCE: electric motor comprises a body (1), where a stator yoke (2) is placed with explicit-pole teeth (3), excitation coils (4) from a winding wire with polyimide-fluoroplastic insulation. On a shaft (6) there is a rotor (7) mounted with similar teeth (8) without a winding by number by two teeth less than on the stator. Between the teeth (3) of the stator and teeth (8) of the rotor there is a non-magnet working gap (10), along which cooling sea water passes. To prevent contact corrosion of electric steels of packages of the stator, rotor, body and shaft, discs (11) from magnesium alloy are pressed onto free ends of the rotor shaft, and between the stator teeth there are tyre treads (5) pressed from the same alloy. Discs (11) and tyre treads (5) have a tight electric contract with packages of the rotor (7) and the stator (2).
EFFECT: higher reliability, operability, durability and energy characteristics of valve-inductor electric motors of open design by higher efficiency of electrochemical protection of inner active parts against contact corrosion with their submersion into sea aggressive water - electrolyte.
SUBSTANCE: in a universal commutator electrical machine using for operation process a magnetic field of anchor reaction as a source of excitation flow arranged without a special winding or magnets and with a winding-free inductor, according to this invention, the inductor is divided in the circumferential direction into parts in the middle of its pole ledges with air gaps.
EFFECT: increased capacity in order to increase machine capacity with a winding-free inductor.
FIELD: machine building.
SUBSTANCE: proposed plant comprises housing accommodating motor stator with multiphase winding, compressor compression radial-flow stage flow section fixed elements, housing cover accommodating stator elements of plant rotor magnetic suspension system bearings, and plant rotor carrying rotor elements of bearings and compressor and motor rotary assemblies. Note here that motor stator magnetic core is made up of sections, their number complying with that of compression stages. Magnetically and electrically not conducting separation cylinders are arranged between said sections. Note here that stator winding is shared by all sections and laid in core section and separation cylinder grooves. Every integrated rotary assembly of compressor and motor comprises impeller. Said impeller inlet has guide channels to feed gas to impeller inlet while motor rotor section is located there outside. Note also that magnetic coupling between motor and rotor sections is ensured by fixed cylinders made from electrically nonconducting materials with built-in cores made up of thin stacks of radial plates of electric steel.
EFFECT: decreased overall dimensions.
2 cl, 2 dwg
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