Electromagnetic gear

FIELD: electricity.

SUBSTANCE: in electromagnetic gear containing a housing with mounted stator with multiphase winding coupled to the voltage source as well as the first and second rotors rigidly fixed at the input and output shafts respectively, according to the invention the stator winding is coupled to the voltage source through a regulated frequency converter and placed in grooves of the stator inner surface thus forming poles, while the first rotor is mounted coaxially with stator and fixed rigidly to the input shaft end, is designed as a squirrel cage, which rods are inserted into the rings made from non-magnet material, they have prismatic shape and form teeth of the first rotor, and the second rotor is placed inside the first one and made as a toothed magnetic core with the teeth number z2, equal to z2 = (z1 - p1), where z1 - number of teeth of the first rotor; p1 - number of pole pairs of the stator winding; while the stator, teeth of the first rotor and the second rotor are laminated and made from ferromagnetic thin steel plates.

EFFECT: preserving the possibility of regulation of reduction coefficient at simultaneous providing of design simplification.

1 dwg

 

The invention relates to mechanical engineering, electrical engineering, electromagnetic mechanisms, and particularly to a contactless electromagnetic motors, and can be used as a transfer device with adjustable gear ratio in mechanical systems with a long service life in the absence of lubrication.

Known two-stage gearbox, which is the multiplier (article Dergachev P.A., Kiryukhin VP, Kulaev J.V., Kurbatov, P.A., Molokanov O.N. "Analysis of two-stage magnetic multiplier", Zh. "Electrical engineering", No. 5, 2012, c.39-45)with three of a rotating rotor, the outer stator and the inner modulating ring, outer rotor and the outer magnets of the intermediate rotor form the first stage of the multiplier. The second (intermediate) the rotor has a radially magnetized magnets on the outer and inner sides. The stator, the outer rotor and the outer magnets of the intermediate rotor form the first stage of the multiplier. The third (inner) rotor is rigidly connected with the output shaft. Internal magnets of the intermediate rotor, the second squirrel cage and the inner rotor to form a second (output) stage of the multiplier. The disadvantage of this magnetic gear is the large number of steps. The magnetic system includes four air gap. Modern Vysokoe ergaticheskie permanent magnets of the rare earth elements are of high value. Harmonics of the magnetic field in the second air gap, interacting with external magnets, create variables electromagnetic moments of the source of vibration and noise. A significant drawback of the multiplier is the lack of regulation of frequency of rotation of the output shaft within wide limits.

Closest to the claimed device is an electromagnetic gear (patent RU 2012980, H02K 16/00, H02K 51/00)containing a stator with two polyphase windings, a primary rotor excitation system, the secondary rotor winding, the rectifier and the inverter, and the input of the rectifier and the inverter output is connected respectively to the two windings of the stator, the rectifier output and the inverter input interconnected with the stator and rotor is the end, the stator winding is placed on its two ends, in front of which are mounted rotors. On the input shaft of the gearbox secured one of the rotors, where the magnetic core and winding; the output shaft is fixed the other rotor having a different magnetic circuit and a short-circuited winding. Between the rotors coaxially them and each other are the stators with their cores and multi-phase (e.g. three-phase) windings. A stator fixed in the housing with bearings with shields. Each of the shafts rotates in two bearings of two the hands. The windings of the stators are connected through semiconductor inverter with rectifier and dependent inverter.

The direction of rotation of the output shaft (reverse) is achieved by changing the algorithm of the inverter control.

For convenience, the control mode of the electromagnetic gearbox uses a microprocessor-based device that can provide automatic control according to a given law.

The disadvantage of this electromagnetic gearbox is the presence of two polyphase windings on the stator and two rotor windings. Management is done through two channels: the frequency of the voltage supplied to the stator, and the current supplied to the excitation winding of the rotor. This complicates the design, complicates the regulation, leads to unnecessary losses. The disadvantage of the prototype is associated with its complexity and correspondingly low reliability when used in power transmission.

The claimed invention is directed to the solution of the technical problem of creating a simple and inexpensive design of electromagnetic gearbox, which can be used as a multiplier, with adjustable factor reduction.

The technical result of the claimed device is to simplify the design while maintaining the possibility of regulation of the reduction coefficient.

is the technical result is achieved by what in the electromagnetic gearbox, comprising a housing defined therein a stator with a multiphase winding, is connected to the voltage source and the first and second rotors, is rigidly mounted on the input and output shafts, respectively, the stator winding is connected to the voltage source through an adjustable frequency Converter and placed in the slots of the inner surface of the stator with the formation of poles of the first rotor located coaxially with the stator and rigidly connected with the end of the input shaft, made in the form of a squirrel cage rods which are inserted into the rings of nonmagnetic material, have a prismatic shape and form of the teeth of the rotor and the second rotor located inside the first, made in the form of a toothed magnetic circuit with the number of teeth z2equal to

z2=(z1-p1),

where z1- number of teeth of the first rotor; p1the number of pairs of poles of the stator winding and the stator teeth of the first rotor and the second rotor is made of laminated ferromagnetic sheet steel.

Application of multi-phase windings on the stator allows you to create a continuously variable transmission device with adjustable rate reduction. The magnetic field of the stator with the number of pole pairs p1coming on one side of the ferromagnetic "squirrel" cage, have the soup z 1ferromagnetic cores, the output on the other side of the cell forms a fundamental wave with a small number of pairs of poles equal to the difference between (z1-p1). This Malopolskie magnetic field interacts with the teeth of the inner rotor, the number of which is equal to (z1-R1).

1 shows a schematic structural diagram of the inventive electromagnetic gearbox.

In the electromagnetic gearbox input shaft 1 is mounted for rotation in the shield 9 of the housing 8. Still mounted in the housing 8, the stator 3 is made of laminated sheets of cold-rolled electrical steel with grooves on its inner surface. In the slots of the stator 3 is a multiphase winding 4, forming a pair of stator poles, the number of which is equal to p1. The winding 4 is connected to a regulated frequency Converter 5. Coaxial stator mounted rigidly connected with the end of the input shaft for rotation together with him in the bearings of the first rotor 2. The rotor 2 is made in the form of a squirrel cage rods which are made of laminated ferromagnetic thin rectangular plates, electrical steel and have the shape of a rectangular prism, and rods secured in the rings 11, 12 of nonmagnetic material. These rods form the teeth of the rotor 2, the number of which is equal to z1. Winding gear is th internal with respect to the rotor 2, the second rotor 6 with the number of teeth z2=(z1-p1made of laminated electrical steel, rigidly mounted on the output shaft 7 rotating in the bearings of the shield casing 9 and 10.

Electromagnetic gearbox works as follows. Conclusions winding 4 of the stator 3 serves voltage from the adjustable frequency Converter 5. The resultant magnetic field of the stator interacts with the outer side of the rotor 2 with z1ferromagnetic cores, forming with the inner side of the rotor 2, the magnetic field with the number of pole pairs equal to the difference between (z1-p1). This Malopolskie magnetic field interacts with the teeth of the second rotor 6, the number of which is equal to z2=(z1-p1). Is synchronous rotation of the rotor 6 with the magnetic field.

If the voltage, frequency ω=0 (the magnetic field is constant), then the rotation of the input shaft 1 with a speed Ω1the angular velocity Ω2the output shaft 7 will be proportional to the reduction ratios i

i=z1z1-p1

Ω2=z1z1- p1Ω1=iΩ1

If the angular velocity of the input shaft 1 is equal to zero Ω1=0 and the voltage, frequency ω>0, the magnetic field of the stator rotates with angular velocityΩ=±ωp1(the minus sign is implemented by the Converter when changing the sequence of phases) and communicates with the outside of the ferromagnetic rotor 2. On the inner side of the rotor 2, the magnetic field with the number of pole pairs equal to the difference between (z1-p1). This Malopolskie magnetic field interacts with teeth z2=(z1-p1the second rotor 6, with angular velocity Ω2

Ω2=ωz1-p1.

If the angular velocity Ω1the input shaft 1 and the frequency of the supply voltage of the stator 3 ω>0, the angular velocity Ω2the output shaft 5 depends on the frequency ω and the angular velocity Ω1the input shaft 1 according to the formula

Ω2=z1mi> z1-p1Ω1+ωz1-p1.

In this case, the second rotor 6 with the output shaft 7 rotates synchronously with the speed Ω2. The speed of rotation of the output shaft Ω2directly proportional to the rotation speed of the input shaft Ω1and angular frequency ω stator voltage 3.

To change (control) the reduction coefficient gradually or stepwise should gradually or stepwise to change the frequency ω of the supply voltage of the stator 3.

Such electromagnetic gearbox is streamlined design by performing winding rotors and one stator with one multiphase, for example three-phase winding. While the inventive gearbox has a high specific torque, smooth change in speed of the output shaft of the gearbox relative to the speed of the input shaft (if you change the frequency of the stator voltage), simplicity and ease of use, lack of permanent magnets. The gearbox can be used in various transport systems, wind power as a multiplier. Wind turbine in operation mode are relatively low rotation speed. To reduce weight generators, p is evodemux the rotation of the propeller through a gearbox, the required multiplier, which will allow the use of relatively light and fast generators. There is an opportunity to create a system to automatically maintain the output parameters of the generator due to the variable control of the ratio of reduction in function of input speed.

Electromagnetic gearbox, comprising a housing defined therein a stator with a multiphase winding, is connected to the voltage source and the first and second rotors, is rigidly mounted on the input and output shafts, respectively, wherein the stator winding is connected to the voltage source through an adjustable frequency Converter and placed in the slots of the inner surface of the stator with the formation of poles of the first rotor located coaxially with the stator and rigidly connected with the end of the input shaft, made in the form of a squirrel cage rods which are inserted into the rings of nonmagnetic material, to form the teeth of the rotor, and the second rotor is located inside the first, made in the form of a toothed magnetic circuit with the number of teeth z2equal
z2=(z1-p1),
where z1- number of teeth of the first rotor;
p1the number of pairs of poles of the stator winding;
moreover, the stator teeth of the first rotor and the second rotor is made of laminated ferromagnetic that is cristoval steel.



 

Same patents:

FIELD: electricity.

SUBSTANCE: in electromagnetic gear containing a housing with mounted stator with multiphase winding coupled to the voltage source as well as the first and second rotors rigidly fixed at the input and output shafts respectively, according to the invention stator winding is coupled to the voltage source through a regulated frequency converter and placed in grooves of the stator inner surface thus forming poles. The first rotor mounted coaxially with stator and fixed rigidly to the input shaft end is made as a squirrel cage, which rods inserted to rings made of non-magnet material form teeth of this rotor with height equal to a half width of the groove, and the second rotor placed inside the first one is made with grooves at its outer surface and short-circuited winding is placed to them, at that the stator, teeth of the first rotor and teeth of the second rotor are laminated and made of ferromagnetic thin steel plates.

EFFECT: simplifying design with potential regulation of reduction ratio.

FIELD: electricity.

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FIELD: electricity.

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FIELD: electricity.

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EFFECT: simplifying design with potential regulation of reduction ratio.

FIELD: engines and pumps.

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FIELD: electricity.

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7 dwg, 1 tbl

FIELD: electricity.

SUBSTANCE: magnetoelectric motor comprises a rotor, made of two parallel discs fixed on the shaft, on every of which there is a ring-shaped row of permanent magnets with alternating polarity. Poles of the permanent magnets arranged at one of rotor discs face the opposite poles of the magnets placed on the other disc of the rotor, the stator is placed between discs of the rotor with a gap relative to the shaft and is equipped with circular windings in the form of isosceles trapezoids, sides of which are arranged radially relative to the axis of rotor rotation. According to the invention, the stator is made in the form of two plates parallel to each other, circular windings are placed between plates, sections of circular windings in the bases of trapezoids are bent according to the arc, circular windings of one plate of the stator are inserted into circular windings of the other plate of the stator with formation of modules, besides, the distance l between sections of circular windings in bases of trapezoids exceeds the width b of the ring-shaped row of permanent magnets of the rotor.

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2 cl, 11 dwg

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SUBSTANCE: in an electromagnetic generator a rotor is equipped with permanent magnets, and a stator comprises two parallel plates (5, 6), between which there are circular windings (7), made in the form of isosceles trapezoids, sides (8, 9) of which are arranged radially relative to the axis of rotor rotation, and sections (11, 12) of circular windings (7) in trapezoid bases are bent along the arc. The rotor is made of two parallel discs (1, 2) fixed on a shaft (10), on every of which there are ring-shaped rows of permanent magnets (3, 4) arranged on opposite surfaces, and their polarity in every row alternates. Poles of permanent magnets (3, 4) in a single row face opposite poles of permanent magnets (3, 4) of another row. Circular windings (7) are inserted into each other to form modules, at the same time the distance 6 between sections of circular windings (7) in trapezoid bases exceeds width b of the ring-shaped row of permanent magnets (3, 4). At the same time according to this invention between circular windings (7) there is an additional flat circular winding (13) in the form of an isosceles trapezoid, sides (14) of which are arranged in one plane between sides (8, 9) of other circular windings (7).

EFFECT: provision of the possibility to generate three-phase electric current.

FIELD: electricity.

SUBSTANCE: disclosed rotary MHD machine has disc rotors and collectors for inlet and outlet of the working medium, mounted in parallel in a housing. According to the invention, working elements which convert energy of the working medium to mechanical energy and then to electrical energy are disc rotors made from electroconductive porous material which is pervious on at least one end surface and are mounted with possibility of counter-rotation while providing electrical contact with each other on electroconductive areas of the rotor shafts which alternate with insulated areas of shafts in checkered order relative each other. Each pair of rotor discs lying in the same plane is placed between poles of permanent magnets placed in a perpendicular plane to axes of the rotors and is connected in series to only one pair of voltage contacts on shafts so as to allow series-flow of current through each disc of both rotors.

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EFFECT: reduction of vibration level for electric motor housing, increase in performance and economical operation.

1 dwg

FIELD: electricity.

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2 dwg

FIELD: electrical engineering.

SUBSTANCE: magnetoelectric machine rotor system consists of two coaxial rotors. The external (outer) rotor is designed in the shape of a hollow cylinder of high-strength, non-magnetic and electrically non-conductive material with constant magnets uniformly fixed thereon; the magnets are magnetised in a radial direction and have alternating polarity. There are gaps between the external rotor magnets wherein the retaining elements are positioned made of a non-magnetic and electrically non-conductive material. The internal rotor is designed in the shape of a shaft of a magnetically soft material, toothed on the outside, the internal rotor teeth number equal to that of the external rotor permanent magnets. The internal rotor radial bearings are positioned outside the external rotor bearings. The external rotor axial bearing is represented by axial magnetic forces of interaction between the permanent magnets of the external rotor, the stator core and the shaft.

EFFECT: provision for the rotor system rotors strength margin and increasing the proper frequency to a value in excess of rotation rate.

16 cl, 3 dwg

FIELD: electricity.

SUBSTANCE: invention relates to the field of electrical engineering and transport machine building and may be used in development of mechanisms, in which it is necessary to change torque and rotations of an output shaft of an electric motor. According to this invention, in an electric motor a differential gear is used as a converter of transmission ratio, and the gear comprises one input and two outputs, the input of which is connected to a rotor of the electric motor, one of outputs, to which a high torque is sent, is connected with an output shaft, and the second output is connected with the second rotor, which is inductively connected with the rotor of the electric motor, and in case of their mutual rotation, it generates electric energy, and force arising at the same time, by changing which, through variation of inductive connection between rotors, the speed up rate may be controlled, as well as output shaft rotation speed, partially blocking the gear, aims to reduce mutual relative opposite rotation of the electric motor rotor and the second rotor. The second rotor is also connected with a speed-up coupling, which is connected with the body by a response part, and preventing rotation of the second rotor to the side opposite to direction of the electric motor rotor rotation.

EFFECT: multiple increase of electric motor torque in case of speeding.

1 dwg

FIELD: electrical engineering; electrical transmission for vehicles including those incorporating combined power units.

SUBSTANCE: proposed electromechanical power unit that has ac motor whose rotor shaft is directly coupled on one end with output shaft of heat-engine and on other end, with drive wheel through clutch, gearbox, main transmission, and differential, semiconductor converter connecting stator winding to storage battery, and control system whose outputs are connected to control inputs of semiconductor is also provided with additional intermediate rotor inserted in stator-to-rotor clearance whose shaft, and not second end of main rotor shaft, is directly coupled with drive wheels through main transmission and differential.

EFFECT: simplified design and control, reduced mass and size, enhanced reliability, speed, and efficiency of electromechanical power unit.

1 cl 2 dwg

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