Non-contact magnetoelectric machine with axial excitation

FIELD: electricity.

SUBSTANCE: invention refers to the design of non-contact synchronous electric machines with axial excitation and can be used in wide range of frequencies of machine shaft rotation (from units of revolutions per minute to several tens of thousands of revolutions per minute) in automation systems, independent electric equipment systems, in military, space engineering, on aviation and automobile transport, as traction controlled and non-controlled electric actuators, wind-driven generators, multiphase synchronous motors, multi-phase high-frequency synchronous AC electric generators and multiphase generators of frequency converters (including three-phase systems), as well as at rectification of output variable voltage and current of generators by means of semiconductor rectifying devices and with possibility of using smoothing filters to reduce fluctuations of output parameters - as DC (rectified current) power supply sources. Stator of the proposed magnetoelectric non-contact machine with axial excitation contains odd and even armature cores. Each core of armature has laminated pack consisting of insulated electrotechnical steel plates with high permeability with salient poles of armature. Cores of armature, the number of which is at least two, are fixed in non-magnetic housing. On salient poles of armature there located is coil multi-phase winding of armature, each coil of which envelopes one of salient poles of armature of each armature core, which are located opposite each other in axial direction. Ring-shaped layers of segmental constant magnets are located between armature cores. In ring-shaped layers the constant magnets adjoin odd armature cores in axial direction by means of one magnetic polarity, and they adjoin even cores with the other magnetic polarity. Number of ring-shaped layers of segmental constant magnets is one less than the number of armature cores. Rotor without winding includes non-magnetic shaft with soft magnetic bushing put on it, on which there coaxially located are odd and even rotor magnetic conductors with pole projections, which are represented with laminated packs and consist of insulated electrotechnical steel plates with high magnetic permeability. Number of magnetic conductors of rotor is equal to number of armature cores. Odd and even rotor magnetic conductors are located relative to the appropriate odd and even armature cores and have the same active length in axial direction. Even rotor magnetic conductors are offset relative to odd magnetic conductors in tangential direction through the half of pole pitch of rotor magnetic conductor. At that, certain ratios are fulfilled between the number of salient armature poles, number of phases of multi-phase coil winding of armature, number of salient poles of armature in phase and number of pole projections of each magnetic conductor of the rotor.

EFFECT: obtaining reliable and highly repairable design, appropriate to the material, of multi-phase non-contact magnetoelectric machine with axial excitation with high energy properties and operating characteristics at wide range of shaft rotation frequencies and with various ratio of active length and bore diameter of machine stator.

16 cl, 4 dwg

 

The invention relates to the field of electrical engineering, in particular to a high-torque electric motors, electric drives and high-frequency generators, concerns the design of contactless synchronous magnetoelectric machines with axial excitation and can be used in a wide range of frequencies of rotation of the shaft of the machine (from units of revolutions per minute to several tens of thousands rpm) in automation systems, Autonomous systems, electrical, military, space technology, aviation and road transport, as a traction managed and unmanaged drives, wind turbines, multi-phase synchronous electric motors, multi-phase, high frequency synchronous electric alternators and multiphase generators converters frequency (including three-phase system), as well as by straightening the output AC voltage and current generators using semiconductor rectifying devices and the possibility of applying a smoothing filter to reduce the ripple of the output parameters, such as power supplies constant (rectified) current.

Known alternators with permanent magnets (Vasilopoulou, FLA. Electric generators with permanent MAGN is Tami. - M.: Energoatomizdat, 1988. Page 23÷46)having a magnetic system with rotating and stationary magnets. On the constructive implementation of the rotors with permanent magnets can be divided into the following groups:

- with a cylindrical magnet in the form of rings, magnetized in the radial direction;

- type the asterisk with salient poles without pole shoes and pole shoes;

- type "star" with a prismatic magnets and pole shoes;

collector with prismatic magnets and tangential magnetization;

- claw with a cylindrical permanent magnet magnetized in the axial direction.

For magnetic systems with rotating magnets is also a system for the mechanical type. Magnetic non-contact system of generators with fixed permanent magnets are of the following types: vnesheconom magnetic circuit, inductor and switch types. In addition, the known magnetic systems and the design of alternators combined excitation, in which the magnetic worker thread is created by the joint action of permanent magnets and electromagnetic field windings when applying thereon a constant electric current. The disadvantages of magnetic systems and structures generators peremennog the current described on pages 25, 26-30, 33, 36, 40, 43, 44, 46 the specified source.

Known single-phase contactless magneto generator (Patent RU, 2393615 C1 IPC H02K 21/12, H02K 21/26, H02K 21/02, author Chernukhin VM)that contains the stator with the laminated armature core with salient poles and coil single-phase winding of the armature coils which are placed on the respective salient poles of the armature, one for each pole, single-phase coil windings of the armature are connected according to the magnetic attitude, and winding the rotor inductor with odd and even cores and with the same number of salient poles on each core, the cores of the inductor is made in the form of packets, recruited from isolated electrical steel sheets with high magnetic permeability, the number of cores of the inductor at least two active length of the far inductor cores in the axial direction are the same, even the cores of the inductor is displaced relative to the odd cores of the inductor in the tangential direction by half the pole dividing the core of the inductor, the inductor cores pressed on the corresponding sleeve, which is a magnetic inductor made of soft magnetic steel with high magnetic permeability and mounted on non-magnetic sleeve, the thickness of which is directed in the radial and substantially greater than the air gap between the stator and the rotor, between the magnetic inductor are annular layers axially magnetized in one direction segmental permanent magnets, the permanent magnets adjacent to the magnetic coil in the axial direction and are arranged in such a way that the sleeves with the odd cores of the inductor adjoined the permanent magnet poles of one polarity, and sleeves with even the cores of the inductor adjoined the permanent magnet poles of the other polarity, the number of ring layers segmental permanent magnets to one less than the number of cores of the inductor, the number of salient poles of the armature is determined by the equality: Z1P=2·k, the number of salient poles of each core of the inductor is determined by the equality: Z2P=k, where k=2, 3, 4, 5, ... - positive integer, starting with two, the width of the pole arc of the salient poles of the armature in the angular dimension is determined by the expression b1P=(0,76÷1,0)·t1Pwidth pole arc salient poles of each core inductor in the angular dimension is determined by the expression: b2P=(0,38÷0,5)·t2Pwhile t1P=360°/Z1Pis a pole division of the salient poles of the armature in the angular dimension, t2P=360°/Z2Pis a pole division of the salient poles of each core inductor in the corners of the m dimension. The disadvantage of analog is the limited application, as it can only be used as irreversible electrical machines - generator and generate only single-phase alternating electric current, and when the rectification of the alternating voltage and current using semiconductor devices unavoidable significant ripple of the rectified electric current to reduce which additionally use smoothing filters.

Famous adopted for the prototype contactless induction brushless electric machine with electromagnetic excitation (Patent RU, 2277284 C2, IPC H02K 19/10, H02K 29/00, authors: ALEXANDER Demyanenko; Zherdev, I.A.; Kozachenko V.F.; Rusakov A.M.; Esterov VN), comprising a housing defined therein a laminated stack of electrical steel sheets packages stator, the number of which is divisible by two, with grooves in them for laying phase windings, the phase winding placed in the slots of the wound stator so that their coils in the slot parts of the winding parallel to the longitudinal axis of the machine and one coil covers all teeth wound stator located opposite each other, the excitation winding with a longitudinal axis parallel to the longitudinal axis of the machine, located on the stator between the wound stator, a metal non-magnetic shaft of magnetic metal on it, on which the gear p is chum rotor, laminated plates of soft magnetic steel, the number of which equals the number of packets of the stator, two caps with bearings, the total number of phase windings of more than three and the number is a multiple of three, with each three-phase winding are independent zero point and between adjacent phases of different triads have the angle of phase shift, while the ratio of the number of stator teeth Zarticlethe number of teeth of the rotor Zpexpressed as a fraction, in which the number of teeth of the rotor is a simple number, starting with five 5, 7, 11, 13, 17, ... the disadvantage of the prototype is the implementation of a number of packets of the stator only in multiples of two phase windings of more than three and only multiples of three, and the number of teeth of the rotor is the only Prime numbers, starting with five. This reduces the possible design of this technical devices and the possibility of its use.

The aim of the present invention is to provide a construction of the multi-phase contactless magneto-electric machine with axial excitation from permanent magnets located on the stator, with a high energy performance with wide frequency range, shaft rotation (from units of revolutions per minute to several tens of thousands of revolutions per minute).

The present invention is the communication necessary for the function of the machine and poluchennaya energy performance, between the number of salient poles of the armature, the number of phases m-phase armature coil winding, the number of salient poles of the armature in the phase and the number of pole protrusions of each of the magnetic rotor, and the development of the algorithm for the construction of a wiring diagram m-phase coil winding armature magneto contactless machine with axial excitation.

The technical result of the present invention to provide a highly reliable, technologically advanced and vysokorentabelnoy design of multiphase magneto contactless machine with axial excitation with high energy performance and operational characteristics under a wide range of frequencies of rotation of the shaft and with different ratio of active length and bore diameter of the stator of the machine.

A distinctive feature of the present invention from most used electric cars is the design of the stator, which consists of an armature cores with salient poles and concentrated on them multiphase coil of the armature winding, and the active portion of the inductor in the form of an annular layer segmental permanent magnets and winding inactive rotor that allows the car contactless and operate at very high frequencies of rotation of the shaft.

Since C is poured achieve the objectives and the technical result of the invention of the electromagnetic contactless machine with axial excitation contains a stator with odd and even cores of the armature, enshrined in the nonmagnetic case, the number of cores anchors not less than two, each armature core has a laminated stack of isolated sheets of electrical steel with high magnetic permeability with the same number of uniformly distributed around the circumference of the salient poles of the armature, even the cores of the armature are relatively odd in the axial direction without displacement in the tangential direction on the distinct poles of the armature concentrated reel multiphase armature winding, each coil of which covers one of being against each other in the axial direction is clearly expressed pole anchors of each of the armature core, between the armature cores are circular layers segmental permanent magnets in the ring layers of permanent magnets adjacent in the axial direction to the odd cores of the armature poles of one magnetic polarity, and to the even cores - the other, the number of ring layers segmental permanent magnets to one less than the number of cores of the armature, and a winding rotor with a non-magnetic shaft and impaled on his soft magnetic sleeve, which are coaxially arranged odd and even with the pole protrusions of the magnetic rotor is made of laminated packages of isolated electrical steel sheets with the high magnetic permeability, the number of laminations of the rotor is equal to the number of cores of the armature, the odd-numbered and even-numbered magnetic rotor positioned relative to the respective odd and even cores of the armature and are equal to the active length in the axial direction, the active length of the extreme magnetic rotor in the axial direction are the same, in the presence of magnetic rotor more than two, the active length of the magnetic rotor in the axial direction between the extreme magnetic circuits, two times more active length extreme magnetic rotor, even the magnetic rotor is displaced relative to the odd cores in the tangential direction by half the pole division of the magnetic rotor.

In accordance with the present invention for the health contactless magneto machine with axial excitation and get the best energy performance when the maximum specific point on the shaft between the number of salient poles of the armature Z1Pthe number of phases m-phase armature coil winding m=3, 4, 5, 6, ..., the number of salient poles of the armature in the phase of Z1mand the number of pole protrusions of each of the magnetic rotor Z2Pa connection is established, which is expressed by equations (1) and (2):

moreover, the when m=3, 5, 7, 9, ... is the number of salient poles of the armature in the phase of Z1m=1, 2, 3, 4, ..., when m=4, 6, 8, 10, ... - the number of salient poles of the armature in the phase of Z1m=2, 4, 6, 8,...., the width of the pole arc of the salient poles of the armature in the angular dimension is in the range b1P=(2/3÷1,0)·t1Pwidth pole arc pole protrusions of each of the magnetic rotor in the angular dimension is in the range b2P=(1/3÷1/2)·t2Pwhile t1Pand t2Prepresent the pole dividing the armature and each of the magnetic rotor, respectively.

The algorithm wiring diagrams armature winding is simple: the coil in the phase can be interconnected serially, in parallel or mixed, but in magnetic relation with the odd number of phases must be connected to a counter, and when there is an even number of phases according in order, starting with the coil phase, which belongs to the beginning of the phase, the early phases of the armature winding of an odd number of phases may belong to any of the coils in the respective phase, and when there is an even number of phases of the coils in the respective phases, focused on the first according to the numbering of poles Z1P/Z1msalient poles of the armature phase windings of the armature can be interconnected in a star" or "polygon".

The invention is illustrated by figures:

figure 1 - General view with a longitudinal section of the m contactless magneto machine with axial excitation with four circular layers segmental permanent magnets;

figure 2 - cross section of a contactless magneto machine with axial excitation;

figure 3 - example of circuit connection of the coils of the 3-phase armature winding, the phase of which is connected in a star";

figure 4 is an example of the implementation of the scheme of connection of the coils of the 3-phase armature winding during operation of the machine by the generator when it is used as a power source constant (rectified) by an electric current. As a smoothing filter in the figure shows the capacitor. Figure 2÷4 letter marked coil of the multiphase armature winding located on the respective salient poles of the armature. For example, B3 is a coil phase "B", located on the third pole of the armature. The numbering of poles made in the direction of counterclockwise.

In the present invention are possible in various designs multiphase magneto contactless machine with axial excitation:

- with an external stator and an internal rotor;

- with an internal stator and an external rotor.

Consider the design of performance multiphase magneto contactless machine with axial excitation with an external stator and an internal rotor (figure 1, figure 2). Odd 11 and even 2 cores anchors can be performed either just paramagnetically high frequency charge is nymi packages of isolated sheets of electrical steel with high magnetic permeability, or laminated packages, pressed into soft magnetic sleeve to reduce the magnetic resistance to the passage of the permanent magnetic flux inductor connected unipolar through these cores. The cores of the armature is fixed in a metal casing 1 made of a nonmagnetic material such as stainless steel, titanium or aluminum alloys, in order to prevent the circuit constant of the magnetic flux of the inductor is short-circuited by-passing the working air gap. Laminated packages cores anchors have expressed pole 3 anchors, which focuses reel multiphase armature winding. Each coil winding 4 covers one of being against each other in the axial direction is clearly expressed pole 3 of each of the armature core. Coil 4 armature windings are made of copper winding wire or winding copper bus. Between the armature cores are circular layers 10 segmental permanent magnets, in which permanent magnets adjacent in the axial direction to the odd 11 cores of the armature poles of one magnetic polarity, and to an even 2 cores - other. When using machines with small outer diameters of the stator may apply in circular layers 10 one-piece ring-shaped permanent magnets. The number of ring layers 10 a segment of the situations of permanent magnets to one less than the number of cores of the armature. The rotor of the machine in order to prevent "bearing currents, adversely affect the performance and life of the bearing 12 has a non-magnetic shaft 5, made for example from non-magnetic steel or titanium, which planted soft magnetic sleeve 6, which is made of a material with high magnetic permeability, for example of steel 10. On the sleeve 6 are coaxially arranged odd 7 and even 8 with pin lugs 9 of the magnetic circuit of the rotor, a laminated packages of isolated sheets of electrical steel with high magnetic permeability, the number of laminations of the rotor is equal to the number of cores anchors, odd 7 and even 8 cores of the rotor through the shaft 5, the bearing 12 and the bearing shields 13 are positioned relative to the odd-numbered 11 and even 2 cores anchors and have equal active length in the axial direction, the active length of the extreme magnetic rotor in the axial direction are the same, in the presence of magnetic rotor more than two, the active length of the magnetic rotor in the axial direction located between the extreme magnetic circuits, two times more active length extreme magnetic rotor, even 8 cores of the rotor is offset odd 7 of the magnetic rotor in the tangential direction by half the pole fact, the Oia of the magnetic rotor.

Magnetoelectric contactless machine with axial excitation can work in the mode of unmanaged and managed a synchronous motor, controlled stepper motor mode controlled DC motor with independent excitation, as well as synchronous m-phase of the alternating voltage. In addition, by straightening the AC output voltage and electric current of the electromagnetic contactless machine in the mode of its operation generator using semiconductor rectifying devices and the possibility of applying a smoothing filter to reduce the ripple of the output electric parameters it can be used as a power source constant (rectified) by an electric current. In this case, the output ends of the armature winding are connected to the input of the semiconductor rectifier device (figure 4).

Consider motor mode (1÷3). The excitation of the inductor creates a circular layers 10 segmental permanent magnets arranged on the stator between the cores of the armature and forming a permanent magnetic field of the inductor with a constant MDS inductor and unipolar constant magnetic flux, mud through the yoke and expressed pole 3 odd 11 and even 2 cores anchor is, working air gap, the pole protrusions 9 and the yoke 7 odd and even 8 cores of the rotor and the magnetic sleeve 6 of the rotor. When applying for the m-phase armature winding of the AC voltage from the m-phase of the power source and under the influence of this voltage in the armature winding will be alternating electric current, creating alternating rotating magnetic field of the anchor variable in time MDS anchors and variable in time rotor flux. Due to the interaction of the alternating magnetic field of the armature with a permanent magnetic field of the inductor to the rotor of the applied unidirectional during the whole operation time of the electromagnetic motor torque. According to the invention for one period, changes in the magnetic field of the armature, the rotor moves to one pole division of the magnetic rotor. It should be noted that in this construction the rotor rotates in the direction opposite to the direction of rotation of the magnetic field of the armature.

Consider the generating mode (1÷4). The excitation of the inductor creates a circular layers 10 segmental permanent magnets arranged on the stator between the cores of the armature and forming a permanent magnetic field of the inductor with a constant MDS inductor and unipolar constant magnetic flux, mud through the yoke and expressed p is Luca 3 odd 11 and even 2 cores anchors, working air gap, the pole protrusions 9 and the yoke 7 odd and even 8 cores of the rotor and the magnetic sleeve 6 of the rotor. During rotation of the rotor by a third-party source point, the magnetic flux of the inductor will maintain its direction in the soft magnetic sleeve 6 of the rotor, pulsing in distinct poles 3 odd 11 and even 2 cores of the armature from the pole protrusions 9 odd 7 and even 8 cores of the rotor. This AC (pulsed) magnetic flux will be induced in the coils 4 armature winding of a variable in time, EDS. It should be noted that if more than one phase coil 4 value induced in each coil phase armature winding of the variable EMF at any point in time will be the same, and the variable EMF phase armature winding is equal to the algebraic sum inductively EMF in each coil 4 phases due to the connection of the coils in the phase based algorithm wiring diagrams armature winding. If the external circuit load circuit is closed, in a multiphase armature winding will be alternating electric current, the electric power will be given to the consumer. Frequency f (Hz) variable EMF multiphase armature winding associated with the frequency of rotation n (rpm) of the rotor and is determined by the equation: f=n·Z2P/60.

1. Magnetoelectric contactless machine with axial excited is eat, containing a stator fixed in the housing of laminated sheets of electrical steel packages and the rotor with a metal non-magnetic shaft and a sleeve of magnetic material installed laminated packages rotor therein, the number of which equals the number of packets of the stator, characterized in that the casing is made of non-magnetic, it provides odd and even cores of the armature, the number of cores anchors not less than two, each armature core has a laminated stack of isolated sheets of electrical steel with high magnetic permeability with the same number of uniformly distributed around the circumference of the salient poles of the armature, even the cores of the armature are relatively odd in the axial direction without the displacement in the tangential direction on the distinct poles of the armature concentrated reel multiphase armature winding, each coil of which covers one of the located opposite each other in the axial direction is clearly expressed pole anchors of each of the armature core, between the armature cores are circular layers segmental permanent magnets, annular layers of permanent magnets adjacent in the axial direction to the odd cores of the armature poles of one magnetic polarity, and to the even cores - other, including conceviable segmental permanent magnets to one less than the number of cores of the armature, soft sleeve mounted on non-magnetic winding shaft of the rotor are coaxially arranged odd and even with the pole protrusions of the magnetic rotor is made of laminated packages of isolated sheets of electrical steel with high magnetic permeability, the odd-numbered and even-numbered magnetic rotor positioned relative to the respective odd and even cores of the armature and are equal to the active length in the axial direction, the active length of the extreme magnetic rotor in the axial direction are the same, in the presence of magnetic rotor more than two active length of the magnetic rotor in the axial direction between the extreme magnetic circuits, two times more active length extreme magnetic rotor, even the magnetic rotor shifted relative to the odd cores in the tangential direction by half the pole division of the magnetic circuit of the rotor, between the number of salient poles of the armature Z1Pthe number of phases m-phase armature coil winding m=3, 4, 5, 6, ..., the number of salient poles of the armature in the phase of Z1mand the number of pole protrusions of each of the magnetic rotor Z2Pa connection is established, which is expressed by equations (1) and (2):


moreover, when m=3, 5, 7, 9, � - the number of salient poles of the armature in the phase of Z1m=1, 2, 3, 4, ..., when m=4, 6, 8, 10, ... - the number of salient poles of the armature in the phase of Z1m=2, 4, 6, 8, ..., the width of the pole arc of the salient poles of the armature in the angular dimension is in the range b1P=(2/3÷1,0)·t1Pwidth pole arc pole protrusions of each of the magnetic rotor in the angular dimension is in the range b2P=(1/3÷1/2)·t2Pwhile t1Pand t2Prepresent the pole dividing the armature and each of the magnetic rotor, respectively.

2. Magnetoelectric contactless machine with axial excitation according to claim 1, characterized in that it is made with an external stator and an internal rotor.

3. Magnetoelectric contactless machine with axial excitation according to claim 1, characterized in that it is made with an internal stator and an external rotor.

4. Magnetoelectric contactless machine with axial excitation according to claim 1, characterized in that the armature cores are made of laminated packages of isolated sheets of electrical steel with high magnetic permeability.

5. Magnetoelectric contactless machine with axial excitation according to claim 1, characterized in that the armature cores are made of laminated packages of isolated sheets of electrical steel with high magnetic Pronichev is d, pressed into soft magnetic sleeve.

6. Magnetoelectric contactless machine with axial excitation according to claim 1, characterized in that for machines with small outer diameters of the stator permanent magnets in the ring layers made of whole circle.

7. Magnetoelectric contactless machine with axial excitation according to claim 1, characterized in that the coils are in phase armature winding with the odd number of phases are connected opposite in magnetic relation.

8. Magnetoelectric contactless machine with axial excitation according to claim 1, characterized in that the coils are in phase armature winding with an even number of phases connected according in magnetic relation in order, starting with the coil phase, which belongs to the beginning of the phase.

9. Magnetoelectric contactless machine with axial excitation according to claim 7 or 8, characterized in that the coil in the phase of the armature winding are connected in series.

10. Magnetoelectric contactless machine with axial excitation according to claim 7 or 8, characterized in that the coil in the phase of the armature winding are connected in parallel.

11. Magnetoelectric contactless machine with axial excitation according to claim 7 or 8, characterized in that the coil in the phase of the armature winding are connected together.

12. Magnetoelectric contactless Masha is and with axial excitation according to claim 1, characterized in that the early phases of the armature winding of an odd number of phases belong to any of the coils in the respective phase.

13. Magnetoelectric contactless machine with axial excitation according to claim 1, characterized in that beginning phase armature winding with an even number of phases belong to the coils in the respective phases, focused on the first according to the numbering of poles Z1P/Z1msalient poles of the armature.

14. Magnetoelectric contactless machine with axial excitation according to claim 1, characterized in that the phases of armature windings are connected in star.

15. Magnetoelectric contactless machine with axial excitation according to claim 1, characterized in that the phase of the armature winding are connected in a polygon.

16. Magnetoelectric contactless machine with axial excitation according to claim 1, characterized in that when used as a power source constant (straight) electric current output ends of the armature winding is connected to the input of the semiconductor rectifier device.



 

Same patents:

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

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EFFECT: reduced dimensions of a generator.

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EFFECT: simplified design of a mechanical switching device due to application of a simpler code device and reduced number of sliding contacts.

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FIELD: electricity.

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EFFECT: reduced time for production deployment, increased flexibility for making changes into the order at the later stages of its completion, increased convenience of service, reduced cost of the electric motor for the on-load tap changer.

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EFFECT: reduced electromagnetic noise.

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FIELD: engines and pumps.

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EFFECT: reduced electromagnetic noise.

3 dwg

FIELD: engines and pumps.

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EFFECT: simplified design, stable operation at low rpm.

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EFFECT: reduced torque pulsation.

4 dwg

FIELD: electricity.

SUBSTANCE: asynchronous ac converter-fed motor with supply from DC source comprises an m-phase winding with even quantity of phases installed on a stator. All phase windings are arranged with a middle lead connected to one terminal of the supply source. End leads of n winding are connected to the second terminal of the supply source by means of controlled key elements, where n = 1, 3, 5, etc., at the same time end leads of (n + 1) winding are connected to the specified leads of n winding via diodes connected in accord relative to current in according sections of n winding. There is a capacitor connected in parallel to each section of (n + 1) winding.

EFFECT: simplified design by simplification of a circuit of an asynchronous motor connection to a DC source, increased reliability of this motor by reduction in quantity of switching key elements.

3 dwg

FIELD: electricity.

SUBSTANCE: in the proposed synchronous reluctance machine, which comprises a multiphase power winding on a stator, which is evenly distributed along an inner bore of the stator and designed for connection to a valve converter, and also a multiphase excitation winding with a full pitch, designed for connection to controlled exciters, according to the invention, at the edges of each rotor pole there is a corrugation arranged in the form of grooves with the pitch h = 8 - 10 mm, and their bases are located in planes parallel to axis of rotor rotation, at the same time the width of each groove is a = 2 - 4 mm, the depth b = 8- 10 mm.

EFFECT: reduced heating of a synchronous reluctance machine rotor due to lower magnetic losses caused by pulsations of excitation magnetomotive force.

3 dwg, 2 ex

FIELD: electricity.

SUBSTANCE: non-contact reduction machine with axial excitation 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 of 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 with possibility of using frame coils of armature winding of non-contact electric reduction machines with axial combined excitation and using electromagnetic reduction in wide ranges at providing high energy parameters and operating characteristics with possibility of smooth and deep control by means of output parameters.

9 cl, 5 dwg, 1 tbl

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

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 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

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