Electric machine of double rotation

FIELD: electricity.

SUBSTANCE: electrical machine of double rotation includes stator, rotors installed so that they can rotate, the first blades that are connected to the first rotor and are rotated with the first rotor in the first direction, the second blades that are connected to the second rotor and are rotated with the second rotor in the second direction, shafts of rotors, and bearings that allow rotation of shafts, load-carrying housing; the first blades and the second blades are arranged outside the housing; stator is made in the form of individual teeth with winding without yoke, and rotors are made in the form of concentric sleeves from material with high magnetic permeability, which are located on outer and inner side of stator; on sleeves there fixed are radially magnetised constant magnets; polarity of neighbouring constant magnets alternates; on each tooth there located is concentric winding insulated from housing; number of poles of the first rotor is equal to the number of periods of the first fundamental harmonic of magnetomotive force of stator winding; number of poles of the second rotor is equal to the number of periods of the second fundamental harmonic of magnetomotive force of stator winding; rotors are not attached to each other and directions of their rotation are opposite.

EFFECT: improving reliability of electric machine of double rotation at simultaneous exclusion of transmission to its stator of reactive moment and providing the possibility of using air flows with low linear speeds for operation of this machine in generator mode.

9 cl, 3 dwg

 

The invention relates to electrical engineering, in particular to electrical machines double rotation.

Known electric machine (patent RU 2360352 C1 IPC NC 16/02, NC 1/16, NC 17/00, author Puckin E.K.), consisting of a device for creating a magnetic field and a device for converting one form of energy into another, characterized in that the device for creating a magnetic field represents a separate unit consisting of a hollow cylinder with flanges at the ends, made of a nonmagnetic material, end-to-end in the radial direction grooves which, on the outside, koltseobrazno, with a certain step fixed cores made of magnetic material serving as a magnetic core, the space between the cores laid winding, preventing loss of the winding is ensured by clamping lugs, made of a nonmagnetic material, which are attached to the end flanges; a device for converting one form of energy into another consists of two rotors; and one of the rotors is installed inside the device to create a magnetic field and communicates with its interior, the other rotor covers the outer part of the device to create a magnetic field and interacts with it. The disadvantage of analogue is that it is a asin the electronic engine and its size, weight and energy indicators worse than a motor with permanent magnets, and in some cases do not meet the requirements.

The closest in technical essence to the present invention (its prototype) is a Wind generator dual rotation (options) [patent RU 2355909 C1 IPC F03B 9/00, authors Zakharenko A.B., Dashko OG, Krivospickiy P., V. Litvinov., Martynov A.M.]containing mounted for rotation in the stator, mounted with the possibility of rotation of the rotor, the first vanes, which act on the rotor and cause the rotation of the rotor in the first direction, the second vanes, which act on the stator and cause rotation of the stator in a direction opposite to the rotation of the rotor, a rotor shaft, a stator shaft and bearings, which allow you to rotate the shafts, bearing housing, wherein the first blades and the second blades arranged outside the housing, with the aim of increasing the specific power of the stator is made in the form of individual teeth with winding without the yoke, and a rotor made in the form of two bonded between the concentric sleeves from a material with high magnetic permeability, with the outer and inner side of the stator, on the bushings fixed radially magnetized permanent magnets of alternating polarity, the polarity of the adjacent permanent magnets - alternate, opposite each other find what I permanent magnets, creating according to the aimed magnetic flows on each tooth is concentric winding, isolated from the body, number of poles 2·R, the number of pairs of poles p, the number of stator teeth z and the number of coil groups in phase d, the number of stator teeth b per phase group, and the number of phases m are related by ratios:

2·R=d·(b·m±1),

z=d·b·m,

p/d=k,

where k=1, 1.5, 2, 2.5, 3, 3.5... is a positive integer, or a number that differs from it by 0.5, if k is an integer, the winding coil groups within each phase are connected in accordance with, and when k is an integer of 0.5, the winding coil groups within each phase are connected to the counter, to achieve the best energy performance for m=2, 3, b=1, 2, 3, 4, 5..., and

if (b·m±1) is an even number, then d=1, 2, 3, 4, 5...,

if (b·m±1) is an odd number, then d=2, 4, 6, 8...

The disadvantage of the prototype is the presence of brush contact, which determines its lack of reliability.

The aim of the present invention is to provide a machine

1) contactless, highly reliable,

2) with the rotors rotating in different directions, their torques almost compensate each other, thus, the reaction torque on the stator barely passed.

Winding with a fractional number of slots per pole and phase q<1, where q=Z/2·p·m, located on the stator, have extensive Garmo the practical part of MDS. However, two harmonics MDS have the greatest amplitude and rotate in opposite directions with different, although close to each other by the number of periods per unit time (pairs of poles). MDS such winding can be written as follows:

F=F1m·sin(ω1t-p1α)-F2m·sin(ω1t+R2α),

where F1mF2m- the amplitude of the harmonics with the largest amplitude, ω1angular frequency, t is time, R1, R2- the number of periods (pairs of poles) mentioned harmonics. If you create an electric machine with two rotors having a number of pairs of poles p1and R2the rotor has the same number of pairs of poles, as applicable, harmonica, will be with her to interact with.

The invention is illustrated by drawings:

figure 1 - cross section of the active part of the electric machine double rotation with the number of stator teeth Z=15 and the number of pairs of poles of the rotor R1=7, p2=8;

figure 2 is a longitudinal section of the active part of the electric machine double rotation;

figure 3 - General view of the electric machine double rotation mode of the wind generator.

As an example, for a three-phase winding (m=3) can cause the following ratio of numbers of teeth Z of the armature and the poles of p1and p2rotor:

for Z=y·m·k R1=I·k, R2=(I+1)·k, where y=1;

for Z=y·m·k p1 =(I+1)·k, p2=(I+2)·k, where I=3, 4;

for Z=y·m·k p1=(I+2)·k, p2=(I+3)·k, where y=5,

for Z=y·m·k p1=(I+3)·k, p2=(I+4)·k, where y=7, 8;

for Z=y·m·k p1=(I+4)·k, p2=(I+5)·k, where y=9;

for Z=y·m·k p1=(I+5)·k; p2=(I+6)·k, where y=11,

at the same time, k is a positive integer, k is the number of cyclically repeating sections of the magnetic system.

Figure 1 shows a sketch of the cross section of the active part of the electric machine double rotation and the circuit of the stator winding for the option with the number of teeth 1 of the stator core Z=24, is hosting a three-phase winding 2 connected in star, where a, b, C - the beginning of the respective phases. The coil 2 may be connected in a triangle. The number of pairs of poles of the first rotor R1=7, the poles of the first rotor is formed using seven pairs of permanent magnets 3, alternating polarity attached to the yoke of the first rotor 4. The number of pairs of poles of the second rotor p2=8, the poles of the second rotor is formed using eight pairs of permanent magnets 5, alternating polarity attached to the yoke of the second rotor 6. Adjacent coils in the coil group of the stator must be connected to a counter, as they are mostly under the poles of the rotor opposite polarity. Coil in coil groups and coil group of the phases are connected in all phases of Odin the PSBs. The yoke of the rotor 4 and 6 shall be made by machining of castings or forgings structural steel with high magnetic permeability, such as steel 10. The teeth 1 of the stator must be laminated stack of electrical steel sheets, the direction of blending is perpendicular to the axis of rotation of the rotors. With the aim of reducing the cost of the stator teeth and yoke may be made of a powder magnetic material, for example, by pressing. With the aim of eliminating the magnetic force of attraction of the rotor to the stator and associated magnetic vibrations of the teeth 1 of the stator can be made of non-magnetic non-conductive material. For improving the energy performance radial size of the teeth should be maximally reduced.

Coil winding 2 of the stator rewound from the winding wire, for example, copper enamel wire, electrically insulating frames or subcool insulation on each tooth of the stator 1. To reduce electric ("ohmic") losses reel group or phase in General, can nakativaetsa continuous wire (without soldering). For simplification and automation of the winding coils of the winding 2 teeth 1 are manufactured separately, the teeth 1 wound coil 2, and then the teeth fasten the reference stator ring 7, which is attached to the housing 8. After wrapping RA is from to increase the electric strength of insulation and increase its reliability is impregnated winding 2 varnish or fill winding 2 compound.

The first and second rotor shafts 9 and 10 fixed in bearings 11, which allow you to rotate said shafts.

Electric machine double rotation works as follows. The magnetic flux of the permanent first magnet 3 of the inductor of the first rotor passes through the air gap between the stator and the rotor, the tooth 1 of the stator, the air gap between the stator and the rotor, the permanent magnet 5 of the inductor of the second rotor yoke 6 of the inductor of the second rotor, the permanent magnet 5 of the inductor of the second rotor, the air gap between the stator and the rotor, the tooth 1 of the stator, the air gap between the stator and the rotor, the permanent magnet 3 of the inductor of the first rotor and closed by the yoke 4 of the inductor of the first rotor. On the coil winding 2 of the stator is supplied with alternating voltage. When connecting voltage of frequency f will be formed 2 harmonic MDS with the largest amplitudes, rotating in opposite directions with speeds n1=f·60/p1n2=f·60/p2.

If the winding circuit is closed, current flows, the teeth 1 placed on them by the winding 3 is moved harmonics of magnetomotive force. The permanent magnets 3 and 5 of the two rotors interact with harmonics MDS stator, who have with them the same pole versions, rotors torque occurs. In the blades of the fan (nacosa the) 12 and 13 of the first and second rotors rotate in opposite directions.

The technical result of the present invention when operating in motor mode is that due to the rotation of the rotors in different directions, for example, in the case of the fan (pump) load can increase the speed of the pumped air (fluid) in two times in comparison with the machine, with one rotor.

Electric machine double rotation can also be employed in the generator mode, for example, as wind turbines. Electric machine double rotation in the generator mode has a horizontal axis of rotation and mounted on the rotary top of the mast 14. Orientation in the direction of the air flow is carried out by the regulator 15. Electric machine double rotation housed in a sleek gondola 16. The blades 12 and 13 of the first and second rotors have the inclination and length to provide the mentioned rotation of the rotors in different directions with a frequency proportional to the rotation frequencies of the first and second harmonics of the MDS with the greatest amplitude.

If the wind through the stabilizer 15 electric machine double rotation is oriented in the direction of air flow. The blades 12 and 13 rotate in opposite directions with speeds n1and n2, rotate the first and second rotors in opposite directions. The magnetic flux of the rotor crosses the coils of the stator winding 2, the coil 2 is induced EMF. If the chain winding is closed, then it flows the current in the load is given power.

The technical result of the present invention when operating in the generator mode is used for the generation of air flows with low linear velocity.

1. Electric machine double rotation containing the stator is installed with the possibility of rotation of the rotors, the first blades, which are connected with the first rotor and rotate with the first rotor in the first direction, the second blades, which are connected with the second rotor and rotate with the second rotor in the second direction, the shafts of the rotors and bearings, which allow you to rotate the shafts, bearing housing, the first blade and the second blade is mounted outside the housing, the stator is made in the form of individual teeth with winding without the yoke and the rotor is in the form of concentric sleeves from a material with high magnetic permeability, with external and internal side of the stator, on the bushings fixed radially magnetized permanent magnets, the polarity of the adjacent permanent magnets alternates, each prong is concentric winding, insulated from the housing, wherein the number of poles of the first rotor is equal to the number of periods of the first fundamental wave MDS stator winding, the number of poles of the second rotor is equal to the number of periods of the second fundamental wave MDS on the coils of the stator, the rotors are not bonded to each other and the direction of rotation opposite.

2. Electric machine double rotation according to claim 1, characterized in that for three-phase winding (m=3), the following ratio of numbers of teeth Z of the armature and the poles of p1and p2rotor:
for Z=y·m·k p1=y·k, p2=(y+1)·k, where y=1;
for Z=y·m·k p1=(y+1)·k, p2=(y+2)·k, where y=3, 4;
for Z=y·m·k p1=(y+2)·k, p2=(y+3)·k, where y=5;
for Z=y·m·k p1=(y+3)·k, p2=(y+4)·k, where y=7, 8;
for Z=y·m·k p1=(y+4)·k, p2=(y+5)·k, where y=9;
for Z=y·m·k p1=(y+5)·k; p2=(y+6)·k, where y=11,
thus y, k positive integers, k is the number of cycles
repeating sections of the magnetic system.

3. Electric machine double rotation according to claim 1, characterized in that the teeth of the stator made of laminated electrical steel sheet.

4. Electric machine double rotation according to claim 1, characterized in that the teeth of the stator is made pressed from the magnetic powder.

5. Electric machine double rotation according to claim 1, characterized in that the teeth of the stator is made of a nonmagnetic conductive material, while their radial size of the maximum reduced.

6. Electric machine double rotation according to claim 1, characterized in that the phase winding when m=3 are connected in star.

7. Electric machine double rotation according to claim 1, great is the rpm die, that phase winding when m=3 are connected in a triangle.

8. Electric machine double rotation according to claim 1, characterized in that when the AC voltage at the stator winding it operates in motor mode.

9. Electric machine double rotation according to claim 1, characterized in that in the presence of external torques on the rotors it works in generator mode.



 

Same patents:

FIELD: electricity.

SUBSTANCE: device intended to retain at least one constant magnet creating magnetic flow on surface of rotor of electrical machine during cooling of the machine, which contains at least one slot sunken from surface and spreading from one end of the above surface, and at least one clamping shaped element inserted at least in one appropriate slot having the projection projecting beyond the surface to come into contact at least with one magnet; at that, at least one slot and at least one clamping shaped element have the shape providing the possibility of retaining at least one clamping shaped element at least in one corresponding slot for retention at least of one magnet brought into contact on surface of the device.

EFFECT: providing reliable clamping and fixation of constant magnets on surface of rotor of electrical machine at simultaneous provision of the device for its cooling.

20 cl, 12 dwg

FIELD: electricity.

SUBSTANCE: invention may be used in wide range of machine shaft rotation frequencies (from several rpm to several tens of thousands rpm) in automatics systems, in autonomous electric equipment systems, in military, space engineering, household equipment, on aviation and motor transport, as traction controlled and uncontrolled electric drives, submersible oil pumps, wind-powered generators, hydraulic generators, multi-phase synchronous electric motors, multiphase high-frequency synchronous electric AC generators and multi-phase generators of frequency converters (including three-phase systems), and also, in rectification of output AC voltage and current of generators with the help of semiconductor rectifying devices and with the possibility to use smoothening filters to reduce pulsations of output parameters, as sources of supply with direct (rectified) current, exciters of synchronous generators of mobile mini-power plants, subexciters of main exciters of synchronous generators at stationary power plants. A stator of the contactless magnetoelectric machine with axial excitation comprises a charged core of an anchor with salient poles pressed in a soft magnetic body, being a magnetic conductor of an inductor, a coil multi-phase winding of the anchor, coils of which are arranged on appropriate salient poles of the anchor, one at each pole. The winding-free rotor of the machine comprises a shaft with a non-magnetic bushing placed on it, thickness of which in radial direction is considerably higher than the value of the working air gap, on which there are odd and even inductor cores with pole ledges arranged in a coaxial manner. Number of inductor cores is at least two, even cores of the inductor are displaced relative to odd cores of the inductor in tangential direction by half of pole division of the inductor core. Between cores of the inductor there are circular layers of segment permanent magnets axially magnetized in one direction and arranged in layers so that a unipolar permanent magnetic flow of the inductor is developed. Number of circular layers of segment permanent magnets is by one less than the number of inductor cores. At the same time certain ratios are met between the number of salient anchor poles, number of phases of the multi-phase coil winding of the anchor, number of salient poles of the anchor in the phase and number of pole ledges of each core in the inductor.

EFFECT: production of highly reliable, manufacturable and highly repairable design of the multiphase contactless magnetoelectric machine with axial excitation with high power parameters and operational characteristics at wide range of shaft rotation frequencies and with various ratio of active length and diameter of the machine stator bore.

18 cl, 4 dwg

Borehole generator // 2426875

FIELD: electricity.

SUBSTANCE: generator includes protective housing, electric connector, at least one attachment assembly, rotor with hydraulic turbine, constant magnets and excitation windings. At that, rotor includes several discs with through radial slots in which constant magnets are installed. Poles of constant magnets are directed parallel to generator axis and alternate. Excitation windings are installed on both sides of each disc. Generator cavity is filled with lubricating fluid. On upper edge of rotor there is filling opening of lubricating fluid to the cavity of generator. Generator includes at least one pressure and temperature expansion compensator interconnected with generator cavity.

EFFECT: simplifying the design, improving reliability and power of generator at decrease of axial dimensions and weight of electric generator.

5 dwg

Borehole generator // 2426874

FIELD: electricity.

SUBSTANCE: borehole generator is equipped with protective housing, electric connector, at least one attachment fitting, rotor with hydraulic turbine, constant magnets, rotor of generator and excitation windings which are fixed inside protective housing. Magnetic coupling containing drive and driven half-couplings and magnetic permeable partition between them is installed between rotors. Discs having radial slots in which constant magnets are installed are fixed on generator rotor. Excitation windings are installed on both sides of discs. Tight magnetic permeable partition containing parts from magnetic permeable material is arranged between driven and drive half-couplings. At that, drive half-coupling is connected to rotor, and driven coupling is connected to generator rotor. Inner cavity of drive half-coupling is filled with lubricating fluid. On upper edge of rotor there is filling opening of lubricating fluid to the cavity of drive half-coupling. Generator includes at least one pressure and temperature expansion compensator interconnected with cavity of drive half-coupling.

EFFECT: simplifying the design, improving reliability and power of generator at decrease of diametrical dimensions and weight of electric generator.

3 dwg

FIELD: electricity.

SUBSTANCE: invention refers to low-speed high-torque electric motors, electric drives and generators, to the design of non-contact electric machines with electromagnetic reduction with combined excitation of inductor and can be used in automation systems as motorised wheels, motorised drums, starter-generators, electric steering wheel boosters, direct drives in domestic equipment, electric drives of high and average power of ships, trolleybuses, trams of the underground, concrete mixers, lifting mechanisms, belt conveyors, liquid transfer pumps, mechanisms with high torques on the shaft and low frequencies of its rotation, as direct drives without using any mechanical reduction gears, as well as wind-driven generators, hydraulic generators, high-frequency electric generators, synchronous generators of frequency converters and as controlled stepped motors. Non-contact reduction machine with salient-pole armature includes stator with housing made from soft magnetic material with odd and even packs of stator, which are laminated and consist of insulated electrotechnical steel plates with high magnetic permeability, and the number of which is not less than two, non-magnetic shaft, stator packs contain salient poles uniformly distributed along cylindrical surface, on inner surface of which there are elementary teeth, stator packs in tangential direction are located so that axes of their salient poles located opposite each other in axial direction coincide; odd and even rotor packs the number of which is equal to number stator packs are pressed on the appropriate odd and even magnetic conductors of rotor, which are put on non-magnetic bushing installed on non-magnetic shaft, rotor packs contain teeth uniformly distributed along cylindrical surface, even packs of rotor are offset relative to odd rotor packs in tangential direction through the half of tooth division of rotor pack; between rotor magnetic conductors there located are ring-shaped layers of constant magnets axially magnetised in one direction, number of ring-shaped layers of constant magnets is one less than number of rotor packs; on salient poles of stator packs there is coil m-phase armature winding each coil of which in axial direction envelopes the appropriate salient poles of even and odd stator packs of one pole of each pack; excitation winding of inductor is made in the form of ring-shaped coils with longitudinal axis coinciding with longitudinal axis of machine; number of ring-shaped coils of excitation winding of inductor is one less than the number of stator packs. At that, for serviceability of machine there shall be certain relations between the number of salient poles of armature, number of elementary teeth on salient pole of armature, number of salient poles of armature in phase, total number of armature teeth, number of teeth on each pack of rotor and number of phases of m-phase armature winding.

EFFECT: manufacture of high-technology constructions of non-contact electric reduction machines with salient-pole armatures with combined excitation and application of electromagnetic reduction in wide ranges at providing high energy parametres and operating characteristics with possibility of smooth and deep control by means of output parametres.

9 cl, 5 dwg, 1 tbl

FIELD: electricity.

SUBSTANCE: invention refers to low-speed high-torque electric motors, electric drives and generators, to the design of non-contact magnetic electric machines with electromagnetic reduction and can be used in automation systems, in domestic equipment, as motorised wheels, motorised drums, starter-generators, electric steering wheel boosters, lifting mechanisms, electric drives of concrete mixers, belt conveyors, liquid transfer pumps, mechanisms with high torques on the shaft and low frequencies of the shaft rotation, as direct drives without using any mechanical reduction gears, as well as wind-driven generators, hydraulic generators, high-frequency electric generators, synchronous frequency converters, and as controlled stepped motors. Non-contact magnetic electric reduction machine with salient-pole armature includes stator the armature core of which consists of insulated electrotechnical steel plates with high magnetic permeability, and has salient poles on inner surface of which there are elementary teeth, coil m-phase armature winding, each coil of which is arranged on the appropriate salient pole of armature, and ferromagnetic rotor without winding, which contains inductor with odd and even toothed cores with equal number of teeth on each core, odd and even toothed cores of inductor are made in the form of packs consisting of insulated electrotechnical steel plates with high magnetic permeability, number of inductor cores is not less than two, even inductor cores are offset relative to odd ones in tangential direction through the half of its toothed division; between magnetic conductors of inductor there located are ring-shaped layers of segmental constant magnets axially magnetised in one direction. At that, for serviceability of non-contact magnetic electric reduction machine with salient-pole armature there shall be certain relations between the number of salient poles of armature, number of elementary teeth on salient pole of armature, number of salient poles of armature in phase, total number of armature teeth, number of teeth on each inductor core and number of phases of m-phase armature winding.

EFFECT: manufacture of high-technology constructions of non-contact magnetic electric reduction machines with salient-pole armatures with deep electromagnetic reduction and enlarged capabilities of their application at maintaining high energy parametres and operating characteristics.

5 cl, 5 dwg

FIELD: electricity.

SUBSTANCE: invention can be used in automation systems as traction controlled and non-controlled electric drives, as wind generators, hydraulic generators, high-frequency electric generators, multi-phase synchronous electric motors and electric generators of frequency converters, as well as multi-phase power sources of electric current. The proposed non-contact modular synchronous magnetoelectric machine consists of modules - "elementary machines", and includes stator the armature core of which is charged and has salient poles with coil m-phase armature winding, each coil of which is arranged on the appropriate salient pole of armature, one per a pole, as well as rotor which contains inductor with salient poles with alternating polarity, which are symmetrically distributed along cylindrical surface and excited with constant magnets. At that, there are certain ratios between the number of salient armature poles, number of phases of m-phase armature winding, number of salient poles in armature module phase, number of modules and number of salient poles of inductor.

EFFECT: high energy data, high specific torque moment on the shaft in electric motor mode and high specific power in electric generator mode of non-contact modular synchronous magnetoelectric machine owing to better use of useful capacity of the machine.

7 cl, 5 dwg

FIELD: electricity.

SUBSTANCE: invention can be used in automation systems as traction controlled and non-controlled electric drives, as wind generators, hydraulic generators, high-frequency electric generators, multi-phase synchronous electric motors and electric generators of frequency converters, as well as multi-phase power sources of electric current. The proposed non-contact modular magnetoelectric machine consists of modules of "elementary machines" and includes stator the armature core of which consists of isolated electrotechnical steel sheets with high magnetic permeability and has salient poles with coil w-phase armature winding, each coil of which is arranged on the appropriate salient pole of armature, one per a pole, as well as rotor which contains inductor with salient poles with alternating polarity, which are symmetrically distributed along cylindrical surface and excited with constant magnets. At that, there are certain ratios between the number of salient armature poles, number of phases of m-phase armature winding, number of salient poles in armature module phase, number of modules and number of salient poles of inductor.

EFFECT: high energy data, high specific torque moment on the shaft in electric motor mode and high specific power in electric generator mode of non-contact magnetoelectric machine owing to better use of the useful capacity of the machine.

7 cl, 5 dwg

FIELD: electricity.

SUBSTANCE: invention can be used in automation systems as traction controlled and non-controlled electric drives, as wind generators, hydraulic generators, high-frequency electric generators, multi-phase synchronous electric motors and electric generators of frequency converters, as well as multi-phase power sources of electric current. The proposed non-contact magnetoelectric machine with modulated magnetomotive force of armature includes stator the armature core of which consists of isolated electrotechnical steel sheets with high magnetic permeability and has salient poles with coil w-phase armature winding, each coil of which is arranged on the appropriate salient pole of armature, one per a pole, as well as rotor which contains inductor with salient poles with alternating polarity, which are symmetrically distributed along cylindrical surface and excited with constant magnets. At that, there are certain ratios between the number of salient armature poles, number of phases of w-phase armature winding, number of salient poles of armature in phase and number of salient poles of inductor.

EFFECT: high energy data, high specific torque moment on the shaft in electric motor mode and high specific power in electric generator mode at reduction of torque moment pulsations, vibration and noise of non-contact magnetoelectric machine owing to its multi-phase design with modulated magnetomotive force of armature.

14 cl, 5 dwg

FIELD: electricity.

SUBSTANCE: invention refers to peculiar features of the design of non-contact synchronous magnetic-electric machines and can be used in automation systems as traction controlled and non-controlled electric drives, as wind generators, hydraulic generators, high-frequency electric generators, multi-phase synchronous electric motors and electric generators of frequency converters, as well as multi-phase power sources of electric current. The proposed non-contact synchronous magnetoelectric machine with modulated magnetomotive force of armature includes stator the armature core of which consists of insulated electrotechnical steel sheets with high magnetic permeability and has express poles with coil m-phase armature winding, each coil of which is arranged on the appropriate express pole of armature, one per a pole, as well as rotor which contains inductor with express poles with alternating polarity, which are symmetrically distributed along cylindrical surface and excited with constant magnets. At that, certain ratios are fulfilled between the number of express armature poles, number of phases of m-phase armature winding, number of express poles of armature in phase and number of express poles of inductor.

EFFECT: high energy properties, high specific torque moment on the shaft, reducing pulsations of torque moment, vibration and noise of non-contact synchronous magnetoelectric machine owing to its multi-phase design with modulated magnetomotive armature force.

13 cl, 5 dwg

FIELD: power industry.

SUBSTANCE: double-rotor tooth wind-driven generator includes stationary stator winding of solenoid type, as well as two rotors from non-magnetic material. Rotors are made in the form of discs and located coaxially. Equal even number of constant magnets is distributed uniformly on each rotor. Stationary stator winding of solenoid type is wound along axis of wind-driven generator and located between two cylindrical cores from ferromagnetic material. Core with larger diameter is fixed with its outer side in the housing. Both rotors are arranged on one shaft. Shaft is connected to wind wheel and has the possibility of being rotated in bearing supports fixed in the housing. Constant magnets are U-shaped, and their poles are located coaxially on each of the rotors and directed unipolar to each other. Each of constant magnets has the possibility of coaxial rotation with edges of cylindrical cores. Edges of cylindrical cores have tooth shape with number of teeth equal to number of constant magnets. Teeth of one edge of cylindrical cores are coaxial to slots of other edge of cylindrical cores. In each slot there located is connection strap from ferromagnetic material, which connects both cores.

EFFECT: increasing EMF induced in stator winding and simplifying the manufacturing procedure of stator winding.

4 dwg

FIELD: engines and pumps.

SUBSTANCE: engine includes stator with the first and the second armatures which form rotating magnetic field, inner rotor with the first and the second constant magnets, and outer rotor (13) located between stator and inner rotor. Outer rotor (13) includes rotor housing (31) that supports the first and the second induction magnetic poles (38L, 38R) made from feebly magnetic material so that they are inserted into rotor housing. Phase of the first induction magnetic pole (38L) coincides with phase of the second induction magnetic pole (38R). The first and the second induction magnetic poles are assembled in rotor housing (31) so that they are inserted into linear slots (31a) formed in rotor housing in (L) axis direction. Since the first and the second induction magnetic poles (38L, 38R) are aligned in (L) axis direction, outer rotor (13) has simple design and improved reliability. Besides, support and assembly of the first and the second induction magnetic poles (38L, 38R) in outer rotor (13) is simplified.

EFFECT: simpler structure of rotor supporting the induction magnetic poles, improving reliability of rotating electric machine.

16 cl, 39 dwg

FIELD: electricity.

SUBSTANCE: in proposed magnetoelectric generator the rotor of which is provided with constant magnets (3) and (4), and stator contains two parallel plates (5) and (6), between which annular windings (7) are arranged, according to this invention the rotor is made of two parallel discs (1) and (2) fixed on shaft, on each of which ring-shaped rows of constant magnets (3) and (4) are arranged on surfaces facing each other and located in each row at equal distance; polarity of constant magnets of each row alternates. At that, poles of constant magnets of one row face opposite poles of constant magnets of other row, and annular windings (7) of stator are made in the form of equal trapezoids the lateral sides (8) and (9) of which are located radially relative to rotor rotation axis, and sections (11) and (12) of annular windings (7) in bases of trapezoids are bent through an arc; annular windings (7) are inserted into each other in pairs. At that, distance ℓ between sections (11) and (12) of annular windings (7) in bases of trapezoids exceeds width b of ring-shaped row of constant magnets.

EFFECT: increasing efficiency coefficient and reducing starting moment of generator, and decreasing noise level during generator operation.

5 dwg

FIELD: electricity.

SUBSTANCE: electric generator is proposed for a wind-driven plant, comprising a stator, a rotor with a base and a cover, magnets and a flat coil. The magnets are installed on the cover and the base along a ring with a certain gap, and there is a flat coil installed between the magnets with a minimum gap, which is closed by circular plates at two sides. The flat coil is made of three windings located in radial gaps of a matrix. The matrix consists of an outer and an inner parts. Circular plates and the matrix are made of a dielectric non-magnetic material, and the base with the rotor cover are made of a magnetically conductive material. The magnets on the cover and the base are arranged as alternating with opposite poles, at the same time the magnets installed on the cover and the base opposite to each other also have the opposite poles.

EFFECT: simplified design of an electric generator for a wind-driven plant with simultaneous increase of its efficiency factor.

7 cl, 9 dwg

Electrical machine // 2400006

FIELD: electricity.

SUBSTANCE: electrical machine comprises stator with winding, inner rotor with output shaft installed in bearings, intermediate rotor covering inner rotor, on inner surface of intermediate rotor there are windings arranged, shaft of intermediate rotor is arranged as hollow, inside there is inner rotor shaft, besides bearings arranged on shafts of inner and intermediate rotors are arranged coaxially to their axis of rotation. On outer surface of intermediate rotor there are groups of permanent magnets arranged with alternating polarity, and generator winding of stator is multi-phased.

EFFECT: increased efficiency of device operation in wide range of inner rotor output shaft rotation speed change due to controlled redistribution of coaxial rotors rotation speeds, production of permanent output power with control of its rotation speed, and expansion of functional capabilities.

2 dwg

FIELD: electricity.

SUBSTANCE: asynchronous motor with hollow short-circuit rotor includes hollow rotor and external stator with core and winding, as well as additional rotor installed on the shaft in the zone restricted with stator with possibility of rotation irrespective of hollow rotor, made from ring-shaped magnet radially magnetised with the number of pairs of poles, which is equal to the number of pairs of poles of stator winding, on which there pressed is thin-wall sleeve from conducting material, and hollow rotor is made in the form of thin-wall shell from conducting material.

EFFECT: increasing power coefficient and efficiency of asynchronous motor with hollow rotor without deterioration of its dynamic characteristics.

3 cl, 2 dwg

Electrical machine // 2396671

FIELD: electricity.

SUBSTANCE: in electrical machine containing the device for creation of magnetic field and device for conversion of one kind of energy to the other, according to the invention, in device for creation of magnetic field (stator) the slots formed with magnetic conductor, which are through in axial direction, are also through in radial direction, and above external part of open slots which are through in radial direction there installed is external rotor enveloping the external part of stator (magnetic field creation device). Thus, electrical machine has inner rotor with which the main magnetic flow interacts, and outer rotor with which leakage flux interacts.

EFFECT: use of leakage flux in electric motors for creation of torque moment Mt, and in current generators for obtaining electric power, and as a result, increasing operating efficiency of electrical machines.

3 dwg

FIELD: electric engineering.

SUBSTANCE: proposed eccentroid electric machine comprises (dwg. 1-2) body (1) arranged with internal ring in the form of elliptic bearing race (2) from dielectric material, stator made in the form of three inertial elements (3), every of which is assembled from plates of electrotechnical steel, comprises axis (4) of rotation, is arranged in the form of rolls equipped with magnetic belts (5) at the ends, which consist of even number of semirings of various polarity. Axis (4) of rotation of each of inertial elements (3) is connected by two telescopic spring links (6) to dampers (7), installed symmetrically on both sides of rotor system, including propeller blades (8), on driving shaft (9) common for stator and rotor, which is arranged eccentrically relative to geometric axis of eccentroid electric machine. Body (1) is closed with two covers (10) at sides, on which at inner sides there are elliptic angle guide elements (11) installed to form together with elliptic bearing race (2) elliptic closed channel for movement of inertial elements (3) in it. Telescopic spring links are arranged relative to each other at the angle of 120°. Rotor system of eccentroid electric machine (dwg. 3-7) consists of two rotors: rotor (12) of free rotation and rotor (13) of forced rotation, rigidly arranged on driving shaft (9). Rotor (12) of free rotation comprises hollow shaft (14) arranged on sliding bearings (15) concentrically relative to both driving shaft and rotor (13) of forced rotation. Inside hollow shaft (14) of ferromagnetic material there is a system arranged from even number of permanent magnets (16) with alternating poles, and outside their rims (17) - magnetic belts (18) made also of even number of permanent magnets. Magnetic belts (5) and (18) of stator and rotor (12) of free rotation are arranged oppositely, and permanent magnets (16) have length comparable to length of rotor (13). Each of dampers (7) comprises hollow cylindrical perforated ring (21), rigidly fixed on driving shaft (9) and divided with internal radial partitions (23), between which compensation springs (24) are installed with thrust. Ends of telescopic spring links (6) arranged in dampers are arranged with hubs (22) rigidly installed on driving shaft (9), are installed in middle part of compensation springs and come out of dampers through holes in their cylindrical rings.

EFFECT: increased efficiency of electric machine operation by provision of ability to generate additional energy used for self-sufficiency of machine operation in rated mode and for supply to loads, and for production of traction used to provide for ability to use electric machine as propeller.

5 cl, 14 dwg

FIELD: electricity.

SUBSTANCE: invention can be used for electric drives, for example in electric propulsion systems of sea vessels, submarines, in traction drives of ground electrically propelled vehicles, hoisting devices, drives of pumps, fans, electric tools, etc., at increased requirements for level of torque pulsations, vibrations, noises and with the possibility of supplying power to motors from typical bridge converters which are batch-produced.

EFFECT: improving operating properties, reaching high efficiency and reliability, simplifying machine design as a whole, providing unique low-level vibration and noise characteristics of electric drive on the basis of the proposed non-contact synchronous machine owing to using stator representing non-ferromagnetic cylinder formed of copper windings of slotless design and filled with special compound with high thermal conductivity, which is placed between cylindrical surfaces of internal and external parts of the rotor made from ferromagnetic material.

1 dwg

Electric machine // 2360352

FIELD: motors and pumps; electric engineering.

SUBSTANCE: invention relates to electric engineering, particularly to electric machines and may be used for converting electric energy. The electric machine construction as disclosed by the invention includes stator magnet core to create magnetic field directing magnetic flows into coils (squirrel wheels) of both rotors. One type of energy is converted into another while both rotors of electric machine rotate. One rotor is installed inside stator generating magnetic field and interacts with its inner part. The other rotor covers the outer part of stator and interacts with it.

EFFECT: improved effectiveness of electric machines such as electric motors-current generators by doubled use of magnetic field flow generated by the same stator coil interacting with both rotors (Φc, Φr).

5 dwg

FIELD: electricity.

SUBSTANCE: electrical machine includes rotor, stator with underslot and radial ventilation channels. As per the design of distance pieces the radial channels are divided into two types; in the channels of one type there installed are distance pieces shutting off the inlet of cooling flow to underslot channels along their perimetre, and in channels of the other type - on the side of the space between the housing and back of stator; at that, sets of channels of each type form ventilation zones alternating in axial direction, at the boundaries of which there installed in the gap are annular dividing partitions, and in the rotor there made are ventilation channels each of which is interconnected with the above ventilation zones. As per the second version, radial ventilation channels closed on the side of the gap alternate in axial direction with radial ventilation channels opened into the gap and divided as per the design of distance pieces into two types.

EFFECT: effective cooling of all active parts of electrical machine at simultaneous provision of possibility of increasing its unit capacity and maintaining the simplicity of the design.

6 cl, 6 dwg

Up!