Three-phase synchronous motor

FIELD: electricity.

SUBSTANCE: invention relates to the field of electric engineering and may be used in three-phase machines with excitation from permanent magnets. Proposed three-phase synchronous motor consists of three-phase stator, winding of which create rotary magnetic field, and rotor, which comprises bushing of non-ferromagnetic material, strip of excitation from ferromagnetic plates with layers of plates of permanent magnets and additional poles of ferromagnetic material with layers of non-ferromagnetic material installed along radial axes of additional poles.

EFFECT: provides for maximum efficiency of motor determined by ratio between useful mechanical capacity developed by motor (Pmech use) and electric power consumed by motor (Pel cons).

5 dwg

 

The invention involves using a three-phase machines with excitation from permanent magnets NC 21/27.

The closest solution to the claimed invention is a patent for a synchronous motor with salient poles of the stator EN 2334341 (author Bahman RI) from 16.05.2007, which should be taken as a prototype.

The difference between the claimed invention from the prototype is the design of the rotor of the motor, consisting of a non-ferromagnetic sleeve of the rotor poles of the excitation and additional poles.

Pole excitation consist of ferromagnetic plates (4) with layers of plates of permanent magnets (5). All of the plates perpendicular to the radial axis of the poles of the excitation.

Additional pole (6) of a ferromagnetic material with radial layers of non-ferromagnetic material (7) are installed along the radial axis of the additional poles close to the poles of the excitation.

The aim of the invention is the design of the engine with maximum efficiency (e), i.e. the ratio of useful mechanical power developed by the engine (PMahol) electric power consumption (Palot).

Stated synchronous motor includes three-phase stator (1, 2) of the winding (3) create a rotating magnetic field, and a rotor consisting of a non-ferromagnetic sleeve (8), on which is placed the pole excitation and an additional pole.

Pole excitation consist of ferromagnetic plates (4) with layers of plates of permanent magnets (5). All plates are mounted in planes perpendicular to the radial axis of the poles of the excitation.

Additional pole (6), mounted close to the poles of the excitation is made of a ferromagnetic material with radial layers of non-ferromagnetic material (7), placed along the axis of the additional poles.

Figure 1 shows the cross-section of the claimed design three-phase synchronous motor with salient poles of the stator with a number of pairs of rotor poles P=2.

On figa, 2b, 2C and 2d shows the path of the axes of the magnetic flux excitation (black lines) and the axes of the magnetic fluxes generated by the currents in the stator winding (red lines) at the angles between the axes of the poles of the excitation and the axes of the rotating magnetic field of the stator (θ) when the angle θ equal to 90, 60, 30 and 0 electrical degrees, respectively.

Figures 1 and 2 the following notation:

1 - the back of the stator; 2 - pole stator; 3 - stator winding; 4 - ferromagnetic plates of poles excitation; 5 - plate permanent magnets poles excitation; 6 - additional pole; 7 - radial layer of non-ferromagnetic material; 8 - rotor bushing; 9 - shaft of the engine.

Three-phase synchronous motor, with the standing of the stator made of laminated electrical steel sheet with three-phase winding, creating a rotating magnetic field of the stator, and the rotor comprising a sleeve of non-ferromagnetic material, pole excitation of ferromagnetic plates with layers of plates of permanent magnets, and an additional pole mounted close to the poles of the excitation is made of a ferromagnetic material and contain a layer of non-ferromagnetic material, set along the radial axis of the additional poles.



 

Same patents:

FIELD: electricity.

SUBSTANCE: syncronous generator includes stator magnet core made from laminated electrical steel having explicit poles where stator windings are situated, and rotor including rotor ferro-magnetic bushing where excitation poles are located. Besides according to the invention, ferro-magnetic shields are located at both sides of each pole. The said rotor bushing is manufactured with radial grooves being located under each excitation pole to ensure full excitation flowing through rotor poles and stator winding flows through the said shields and rotor bushing with maximum possible distance of stator flow in rotor bushing from excitation poles.

EFFECT: improved effectiveness of synchronous generators defined as ratio of available mechanical power produced by generator to mechanical power consumed by generator.

4 dwg

FIELD: electricity.

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EFFECT: provides for high power and operational indices, high specific rotation torque on shaft and high electromagnetic reduction of rotation frequency in mode of electric motor, and high specific power at high frequencies of EMF in mode of electric generator.

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FIELD: electrical engineering.

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1 cl, 2 dwg

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5 cl, 3 dwg

FIELD: electric engineering and electric-mechanical engineering, in particular - constructions of rotors for high-speed electric machines.

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Electric machine // 2241298
The invention relates to the field of electrical engineering, in particular to electrical machines and drives

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Brushless motor // 2231200
The invention relates to the field of electrical engineering and is about brushless motors

FIELD: electricity.

SUBSTANCE: invention relates to the field of electric engineering and designs of contactless reducer electromagnetic machines with electromagnet reduction, intended for use as motor - wheels, motor - drums, direct drives in electrical appliances (electric meat grinders, washing machines, etc), electric drives of concrete mixers, weight-lifting mechanisms, belt conveyors, pumps for pumping of fluids, mechanisms with high torque on shaft and low frequencies of shaft rotation, and also as high-frequency electric generators. Proposed contactless reducer electromagnet machine comprises stator with explicit poles, on inner surface of which there are elementary cogs, m-phased focused anchor winding of which consists of coils, each coil covering an appropriate anchor pole, and winding-free ferromagnetic rotor, comprising two inductor cores displaced relative to each other in tangential direction by half of gear division, with toroid permanent magnet magnetised in axial direction and installed between cores of inductor, to develop magnetic flow of excitation. At the same time certain ratios are maintained between number of anchor poles, number of elementary teeth on anchor pole, number of anchor poles in phase, common number of anchor teeth, number of teeth on each inductor core and number of phases of anchor winding of contactless reducer electromagnetic machine.

EFFECT: high power and operational indices, high specific rotary torque on shaft and high electromagnetic reduction of rotation frequency in mode of electric motor, high specific capacity at high frequencies of electromotive force in mode of electric generator.

12 cl, 14 dwg, 1 tbl

FIELD: electricity.

SUBSTANCE: single-phase contact-free electromagnetic generator includes stator with anchor core composed of insulated electrical steel sheets of high magnetic inductivity and features distinct poles with single-phase anchor coil winding where each coil is positioned at respective distinct anchor pole, and winding-free ferromagnetic rotor including inducer with even and odd cores with the same number of distinct poles in each core. Odd and even inducer cores are made in the form of banks assembled of insulated electric steel sheets of high magnetic inductivity, inducer features at least two cores, even inducer cores are shifted against odd cores in tangential direction for a pole half-pitch of inducer core, inducer cores are set on respective magnetic conductors of inducer, annular layers of segmental permanent magnets magnetised in the one direction are positioned between magnetic conductors of inducer. Certain ratio should be maintained between number of distinct anchor poles and number of distinct poles in each inducer core, and between pole arc width of distinct anchor poles and pole arc width of distinct poles of each inducer core.

EFFECT: high reliability and manufacturability of single-phase electromagnetic generator design, good energy and operational characteristics.

9 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: invention relates to peculiarities of design of contactless electric machines with electromagnet reduction and may be used in systems of automatics, as motor-wheels, motor-drums, starter-generators, electric steering boosters, electric drives of large and medium capacity vessels, transport means, concrete mixers, weight-lifting mechanisms, belt conveyors, pumps for liquids pumping, mechanisms with high torques on shaft and low frequencies of its rotation, and also in wind generators, hydraulic generators, high-frequency electric generators and synchronous generators of frequency converters. Proposed contactless redactor electric machine with combined excitation comprises teethed stator with odd and even laminated packs from insulated sheets of electrotechnical steel with high magnetic permeability with explicit poles, on inner surface of which there are elementary teeth arranged. Besides packets of stator in tangential direction are arranged so that axes of their explicit poles located opposite to each other in axial direction in all packets of rotor coincide, and between odd and even packets of stator there is winding of inductor excitation, arranged in the form of ring-shaped coils with longitudinal axis that matches longitudinal axis of machine, coil m-phase winding of anchor, each coil of which is placed on according explicit poles of stator packets and covers one explicit pole of every packet each, and winding-free ferromagnetic rotor with non-magnetic bush, on which odd and even magnetic conductors of rotor are placed with odd and even rotor packets pressed on them as according charged packets made of insulated sheets of electrotechnical steel with high magnetic permeability, and their number equals number of stator packets, with identical number of teeth on each rotor packet, besides even packets of rotor are shifted relative to odd ones in tangential direction by half of teeth division of rotor packet, and between odd and even magnetic conductors of rotor there are circular layers of permanent magnets axially magnetised in the same direction. At the same time certain ratios are maintained between a number of explicit poles in each stator packet, number of elementary teeth at each explicit pole of stator packet, number of elementary teeth on each explicit pole of stator packet, number of explicit poles of each stator packet in phase, number of teeth of each stator packet, number of teeth in every rotor packet and number of phases of m-phase winding of anchor in contactless redactor electric machine with combined excitation.

EFFECT: invention provides for high power and operational indices, high specific rotation torque on shaft and high electromagnetic reduction of rotation frequency in mode of electric motor, and high specific power at high frequencies of EMF in mode of electric generator.

18 cl, 11 dwg, 1 tbl

FIELD: electricity.

SUBSTANCE: invention is related to the field of electric engineering, in particular to slow-speed high-torque electric motors, electric drives and generators, is related to peculiar features of design in contactless electromagnetic electric machines with electromagnetic reduction and may be used in automatics systems, as motorised wheels, motorised drums, starter-generators, electric steering booster, direct drives in household appliances, electric drives of concrete mixers, weight-lifting mechanisms, belt conveyors, pumps for pumping of liquids, mechanisms with high torques on shaft and low frequencies of its rotation, and also as wind power generators, hydrogenerators, high-frequency electric generators and synchronous generators of frequency converters. Proposed contactless reducer electromagnetic machine with multipack inductor comprises stator, anchor core of which is assembled from insulated sheets of electrical steel with high magnetic permeability and has explicitly expressed poles, on internal surface of which there are elementary teeth arranged, coil m - phase winding of anchor, each coil of which is placed on according explicitly expressed pole of anchor, and winding-free ferromagnetic rotor, comprising inductor with odd and even teethed cores with identical number of teeth on each core, odd and even teethed cores of inductor are arranged in the form of packets, which are assembled from insulated sheets of electrical sheet with high magnetic permeability, number of inductor cores is at least two, even cores of inductor are displaced relative to odd ones in tangential direction by half of teeth division of inductor, between magnetic conductors of inductor there are circular layers arranged from segmental permanent magnets axially magnetised in one direction. Besides certain ratios are maintained between number of explicit anchor poles, number of elementary teeth on explicit anchor pole, number of explicit anchor poles in phase, general number of anchor teeth, number of teeth at each inductor core and number of phases in m - phase winding of anchor of contactless reducer electromagnetic machine with multipack inductor.

EFFECT: provision of high energy and operational indices, high specific rotary torque on shaft and high electromagnetic reduction of rotation frequency in mode of electric motor, and also high specific power at high frequencies of EMF in mode of electric generator.

12 cl, 15 dwg, 1 tbl

FIELD: electrical engineering; mechanical design of rotor systems for permanent-magnet commutatorless electrical machines.

SUBSTANCE: proposed rotor magnetic system has electric steel stampings and N-S radially saturated magnets in the form of rectangular parallelepipeds uniformly disposed within stack of rotor stampings over its circumference. Rotor magnetic system section is assembled of four stacks joined by bars whose length is not smaller than that of section; like-polarity magnets alternately disposed in tandem are offset in axial direction through one fourth of stator slot angular pitch. Rotor magnetic system manufacturing process includes fabrication of two types of stampings wherein key slot and fixation holes for assembling stacks in section are offset relative to magnet holes through angles equal to (1/8)(360/Z) and (3/8)(360/Z) of stator slot angular pitch, respectively, where Z is double product of phase number by pole pair number and slot number per rotor pole and stator slot. Stacks whose number should be a multiple of four are assembled by installing magnets in them and joined in sections so as to ensure relative displacement of magnets in stacks arranged in tandem by one fourth of stator slot angular pitch. Alternative manufacturing process for rotor magnetic system includes fabrication of three types of stampings wherein key slot and holes for assembling stacks in section are offset relative to holes for fixation of magnets through angles equal to (3/40)(360/Z), (9/40)(360/Z), and (15/40)(360/Z) of stator slot angular pitch, respectively. Then stacks whose number should be a multiple of six are assembled by installing magnets in them and joined in sections so that magnets are relatively offset in stacks arranged in tandem by one sixth of stator slot angular pitch.

EFFECT: enhanced performance characteristics of commutatorless magnetoelectric machines, facilitated rotor manufacture, enlarged functional capabilities of such machines.

10 cl, 6 dwg

FIELD: wind power engineering; wind electric generators.

SUBSTANCE: proposed stator of wind electric generator contains magnetic circuits, excitation system, bracing members and winding. According to invention, stator is made in form of two pairs of U-shaped magnetic circuits. Upper pair is pointed with bridges downwards. Excitation system is installed between adjacent points. Lower pair is pointed with bridges up-wards and is enclosed by coil located between adjacent posts.

EFFECT: reduced mass and overall dimensions of generator at minimization of its cost.

3 dwg

FIELD: low-power single-phase synchronous motors.

SUBSTANCE: proposed synchronous motor has stator with U-shaped magnetic core carrying field coils, cylindrical rotor in the form of diametrically saturated permanent magnet, two fastening plates, and laminated locating device for unidirectional starting of rotor. Laminated locating device is installed with its one end on axis of one of fastening plates for rocking and on other end it has shaped hole coaxial with rotor which is provided with two projections formed by shifting two semicircles and is engageable with cam disposed on rotor end eccentrically to axis of revolution, its lateral end directed to interlocking end being disposed on rotor radius line; in order to avoid rotor entering dead zone during starting period, common axis of projections on laminated locating device is inclined through angle of 40 - 55 deg. to stator pole axis, and rotor cam axis is inclined through 90 deg. to rotor pole axis.

EFFECT: simplified design, reduced size of interlocking device in single-phase synchronous motor.

2 cl, 2 dwg

The invention relates to electrical engineering, namely, rotary power sources survey systems

The invention relates to electrical engineering, namely technology high-speed electrical machines with permanent magnets, and can also be used when building other rotating structures

The invention relates to electrical engineering and can be used in stand-alone power plants

FIELD: electricity.

SUBSTANCE: invention refers to the field of electric engineering and electric machine building, namely, to features of design of rotors of electric machines. Proposed nonsalient pole rotor of synchronous electric machine comprises massive magnetic conducting barrel (1) with slots for excitation winding, coils (2) of excitation winding laid in it and arranged of strip conductor with its bending during winding of coils onto narrow side of strip, band rings (3) distant from ends of magnetic conducting barrel (1) and placed onto aligning rings (6) with axial channels in zone of their inner diameter. In front ends of excitation winding every second turn of coil (2) is insulated, and on wide side of strip of non-insulated conductors (9), along their full length in front parts of excitation winding, there are transverse slots (10) that form a system of slot ventilation channels in assembled excitation winding.

EFFECT: improved cooling of front parts of excitation winding of nonsalient pole rotor of synchronous electric machine.

4 dwg

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