Permanent magnet motor

FIELD: engines and pumps.

SUBSTANCE: proposed permanent magnet motor consists of n equal modules, each of which includes a housing, a stator with phase windings, a rotor with constant magnets, which are magnetised in radial direction. Similar phase windings of adjacent modules are connected in series, housings and rotors of modules are connected to each other mechanically, and each module includes circular orientation elements of the stator with phase windings and rotors. At that, according to this invention, in each rotor, one half of magnets is offset relative to the other half in a circumfenertial direction by the half of the tooth division of stator tzs, and in adjacent modules, similar magnets of rotors are offset in a circumferential direction through value tzs/(2n).

EFFECT: improvement of start-up properties of permanent magnet motor owing to reducing pulsations of reactive moment; providing reliable connection of modules and permanent magnet motor as a whole.

2 cl, 5 dwg

 

The present invention relates to the field of engineering, namely modular brushless motors with permanent magnets on the rotor for submersible oil-producing plants.

At the present time has received widespread single-submersible brushless motors (see, for example, patent RU 2247463, NC 21/14, publ. 27.02.2005), which represent a model of interconnected magnetic systems - constant magnetic field of the rotor generated by the permanent magnets, and acting on it rotating electromagnetic field of the stator from the rectified currents, alternately coming in two phases of three-phase windings, depending on the position of the poles of the rotor with respect to these phases. Such motors are widely used as actuators for submersible pumps in the oil industry.

The disadvantage of single motors is limited capacity, due to the technology of their manufacture and the size of the oil wells. One solution to this problem is modular brushless motor, structurally similar to serial asynchronous sectional motors. But unlike asynchronous sectional motor, for which a sufficient condition is a serial connection of the windings of the stators clubs is (s) subject to phase rotation in each section, and arbitrary angular position of the rotor for brushless motor, you need to definitely provide the specified location of the magnetic system of the rotors of each module and the specific spatial arrangement of the phases of the windings of the stators of the same modules in their series connection.

Closest to the claimed is modular submersible brushless motor centrifugal pump (see, patent RU 65314, published 27.07.2007), which are set to the same location of the magnetic system rotors modules and the same arrangement of the magnetic system of the stators of these modules. Each module of the electric motor includes a housing, a stator phase windings, a rotor with permanent magnets, which are magnetized in the radial direction, the same phase winding of each module are connected in series, the casing and the rotor modules are mechanically connected to each other. Each module contains elements of the circular orientation of the stator phase windings and the rotor.

The disadvantage of this motor is increased, the ripple torque reaction and unreliable intersectional connection modules.

The present invention is to improve the starting properties of the brushless motor by reducing ripple torque reaction and ensuring reliability of the CSOs connection modules.

This technical result is achieved due to the fact that in the brushless motor, consisting of n identical modules, each of which includes a housing, a stator phase windings, a rotor with permanent magnets, which are magnetized in the radial direction, the same phase winding of each module are connected in series, the casing and the rotor modules are mechanically connected to each other, and each module contains elements of the circular orientation of the stator phase windings and a rotor, according to the invention, half of the magnets of each module is displaced in the circumferential direction by 1/2 subcatego division stator tzsand in related modules the same poles of the magnets of the rotor are displaced in the circumferential direction on the value of tzs/(2n).

The rotors of the modules may be interconnected using a spline coupling, provided with positioning elements.

The invention is illustrated by drawings, where figure 1 shows a brushless motor in transverse section; figure 2 - connection of the shafts of the rotor modules; figure 3 - splined coupling; figure 4 - the spatial arrangement of the stator modules using labels A; figure 5 - graphs of dependence of specific reactive torque from the angular position of the rotor.

Brushless motor consists of two or more modules, each of which includes a housing 1, the mouth is R with permanent magnets 2, the shaft 3 and the stator 4 with phase windings (figure 1). The magnets of the rotor 2 is magnetized in the radial direction. The shaft 3 adjacent modules are connected to a special splined clutch 5 (figure 2), which secures the relative position of the poles of the rotor 2 of the electric motor, performing the role of an element in a circular orientation. To do this, the clutch 5 is provided by fixing elements, for example, pins 6, which are included in the same the keyways on the shafts 7 3, which pins package rotors. The offset dowels 6 relative to each other by the value of tzs/(2n) make the specified location adjacent modules (figure 3).

In some embodiments, the specified spatial location of rotor modules can be achieved by performing one or more splines on the shaft 3 and the sleeve 5 with a size different from the rest. In addition, for the connection modules can be used clutch, in which the angular shift of the slots 8 on the angle β, which provides the offset of the like poles of the magnets of the rotor adjacent and subsequent modules in the circumferential direction on the value of tzs/(2n).

The mutual location of the poles of the magnetic system on the rotor 2 of each module is achieved by the fact that half of the magnets with the same pole is located over keyway groove 7 of the shaft 3, and the other half is shifted relative to that of the groove 1/2 subcatego the population stator t zs.

Same phase winding of the stator 4 of each module are connected in series by combining the positioning elements:

- labels And (4) in the stator housing defining grooves wound stator, which will start the winding of the first phase;

tags (B (1) in connection node (partition) modules to align with a pin or screw 9 and the cap nut 10.

For positioning the stator winding modules offer the brushless motor is bolted flange connection 11 and the connection with fixings, for example, locking half-rings 12 (figure 1), which play the role of elements in a circular orientation of the stators. Bolted flange connection 11 is designed so that the location of the stator modules and similar phases of their winding is possible only in a certain position.

Joint Assembly of the modules is as follows.

In the stator housing 1 by means of the threaded connection is established, the adapter 13 having an internal thread. The adapter 13 is provided outside the slot 14, and with the end of the threaded holes for the screws 15, when tightening which is the fixation of the threaded connection between the stator 4 and the adapter 13. Into the internal thread of the adapter 13 is screwed to the sleeve 16, which is made Kahn is the WHC for embedded parts, for example, two set of half rings 12. This ensures the installation of the end part 17 of the same module in the housing 1 of the stator of the motor adjacent module. The positioning of the end part 17 and the stator housing 1 is provided by placing between them in the washer with petals 18 and the subsequent bending of the petals in special slots on the stator housing 1 and the end part 17. The positioning of the adapter 13 and 19 between them is done using keyway, or pins, or screws 9 and nut 10.

The claimed design was tested on the example of submersible two-motor size 130 mm, with groove 24 and 24 teeth on the stator, with angular subcover by dividing 360°/24=15°, in which the rotor is offset half of the poles by an angle equal to ½ subcatego division (7,5°), and the rotor of one module is displaced in the circumferential direction relative to the rotor of the second module by a quarter subcatego division of (3.75°). The obtained dependence of the ripple torque reaction is shown in figure 3, figure 5 (on x-axis is the geometric angle of rotation of the rotor relative to the conditional initial position). The reactive torque that can impair the operating characteristics of the motor occurs due to the nonuniformity of the magnetic conductivity of the stator, on which there are grooves and teeth. The main is armonica ripple torque reaction for the submersible motor has a period of 360°/Z cwhere Zcthe number of grooves or teeth of the stator. For example, the most common brushless motor with 24 slots on the stator period equal to 15°.

For comparison, the same dependencies were obtained for similar submersible brushless motor, the rotor of one of which is made without bias magnets (graph 1)and the second rotor is offset half of the poles by an angle equal to half subcatego division (7,5°), (graph 2). From the graphs it is seen that the smallest ripple torque reaction obtained in the brushless motor of the claimed design.

Thus, the proposed design allows a series connection of modules brushless motors provide the specified spatial arrangement of the magnetic system of the rotors of each module and the specified spatial arrangement of the phases of the stators of the same modules, resulting in a ripple torque reaction is minimized.

1. Brushless motor, consisting of n identical modules, each of which includes a housing, a stator phase windings, a rotor with permanent magnets, which are magnetized in the radial direction, the same phase winding of each module are connected in series, the casing and rotor modules are mechanically connected to each other, and each module contains cell battery (included) what you circular orientation of the stator phase windings and a rotor, characterized in that each rotor half of the magnets shifted relative to the other half in the circumferential direction on half subcatego division stator tzsand in related modules of the same name, the magnets of the rotor are displaced in the circumferential direction on the value of tzs/(2n).

2. The brushless motor according to claim 1, characterized in that the rotor modules are interconnected using a spline coupling, provided with positioning elements.



 

Same patents:

FIELD: electricity.

SUBSTANCE: in a six-phase valve-inductor motor derivatives of inductances of phase windings by an angle of rotor rotation have a sinusoidal shape, and higher harmonics are not available, due to certain ratios of angular dimensions of rotor and stator poles, and rotor poles have slants in axial direction. Besides, total currents of phase windings contain in their composition only zero and first harmonics and do not contain higher harmonics. It is achieved due to the fact that each pole of the stator is equipped with two windings, through one of which zero harmonic flows (a constant component), through the other winding current flows, having a sinusoidal shape. The amplitude of current of sinusoidal shape is equal to the DC value. Sinusoidal currents are formed with the help of a three-phase bridge inverter, and DC is generated with a half-bridge inverter. The relay-current method of control is used.

EFFECT: reduced noise and vibrations and increased evenness of torque of rotation.

5 dwg

FIELD: electricity.

SUBSTANCE: in a three-phase high-speed valve-inductor motor the number of rotor poles is equal to doubled number of stator pole pairs, a magnetic conductor of the motor has such configuration of the rotor and stator that provides for permanent value of derivative inductances of phase windings by the angle of rotor rotation, the sign of which changes periodically with the period of 360 electric degrees, and the period of derivative inductances of phase windings by the angle of rotor rotation is shifted by 120 electric degrees, motor phases are switched by currents of special shape, which does not have breaks of derivatives at currents that are not equal to zero and provides for absence of current in points, where break of derivatives inductances of phases takes place by the angle of rotor rotation, the shape of these currents is provided by the control circuit with the help of a relay-current method of control.

EFFECT: reduced losses in windings and a magnetic conductor under the same speed of rotation as in conventional valve-inductor motors, reduced noise and vibrations and increased uniformity of torque.

3 dwg

FIELD: electricity.

SUBSTANCE: in a three-phase valve-inductor motor a magnetic conductor of the motor has such configuration of the rotor and stator that provides for permanent value of derivative inductances of phase windings by the angle of rotor rotation, the sign of which changes periodically with the period of 360 electric degrees, and the period of derivative inductances of phase windings by the angle of rotor rotation is shifted by 120 electric degrees, motor phases are switched by currents of special shape, which does not have breaks of derivatives at currents that are not equal to zero and provides for absence of current in points, where break of derivatives inductances of phases takes place by the angle of rotor rotation, the shape of these currents is provided by the control circuit with the help of a relay-current method of control.

EFFECT: reduced noise, vibrations and increased evenness of rotation torque.

4 dwg

FIELD: electricity.

SUBSTANCE: multiphase winding is connected to an accumulator battery (AB) (1), and elements of each phase are connected in accordance with the following scheme: the start of the first part (2) is connected to the plus of the AB (1) and the cathode of the diode (3), the end of the first part (2) is connected with the anode of the diode (4), the cathode of the diode (4) is connected with the plus of the capacitor (5) and the first output of the semiconductor switch (SS) (6), the second output of the SS (6) is connected to the minus of the AB (1) and the start of the second part (7), the end of the second part (7) is connected to the anode of the diode (3) and the minus of the capacitor (5).

EFFECT: simplified power circuit of a generator in its multiphase version by means of reduction of quantity of requisite accumulator batteries.

2 dwg

FIELD: electricity.

SUBSTANCE: invention is related to electric engineering, in particular, to electric DC machines. The proposed stabilised axial DC generator comprises a body, a pilot exciter, an exciter and the main generator, in which an inner magnetic conductor, a side magnetic conductor with one active end surface and a side magnetic conductor with two active end surfaces are arranged as axial. At the same time, according to this invention, into slots of the side axial magnetic conductor with two active end surfaces at the side of the inner axial magnetic conductor there is an additional winding of excitation exciter, and in the lower part of the generator body there is a voltage controller comprising a metre of voltage deviations, a preliminary amplifier, a unit of power amplification and a power part. The metre of voltage deviations is connected to the output voltage of the generator, and the additional winding of the excitation exciter is connected to a power part of the voltage controller.

EFFECT: expanded area of application of a generator due to stabilisation of output voltage.

2 dwg

FIELD: electricity.

SUBSTANCE: working windings connected in parallel to a load form a closed circuit between each other, which may be supplied from a source of supply. At the same time a part of windings with its group of poles operates in a mode of generation, compensating with its current a decreasing magnetic flow, the other part - in a motor mode, twisting the generator and pulling a counter-electromotive force to the first group. Within a cycle of rotation the sum of electromotive force generation and counter-electromotive forces are equal, but due to active resistance the circuit needs some makeup from a source of supply: an inverter, a microgenerator, an accumulator, or from oscillations of a magnetic flow in stator poles, which is taken by additional windings and after rectification is supplied into an excitation circuit. Besides, the magnetic flow forcedly arises in front of closing poles, if some turns of the winding placed on them are closed at the same time to one of the generator leads. For this purpose a collector may be used, a switchboard operating from a curtain collector or from sensors of rotation or speed of a shaft. At the same time availability of current windings that transfer excitation to poles that are about to generate provides for excitation without a source of supply and a switchboard when reaching a rated mode after receipt of the first current pulse from an accumulator or residual magnetisation. The generator with current excitation may be used for welding, besides, the winding will be phase to any side, both adding and reducing the magnetic flow depending on the welding mode.

EFFECT: simplifying switching and control with simultaneous reduction of a number of switching elements and expansion of generator application area.

4 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: invention relates to the field of electric engineering and may be used in an automated electric drive and systems of automatics. In the proposed inverted valve motor, comprising a stator with an m-phase winding and a rotor comprising an external bushing and permanent magnets, according to the invention, a stator is installed inside the motor, and a rotor comprises an external bushing, on the inner surface of which there is a magnetic system made of 12 pre-magnetised and cut elements, besides, the magnetisation angle of each segment is identified in accordance with the following formula: αSn= 90°(N - 1), where N-an order number of a segment in a shell, the number of pairs in poles of the rotor magnetic field complies with the number of pairs of the stator winding poles.

EFFECT: technical result achieved by this invention consists in increased power and dynamic characteristics of inverted valve motors (IVM).

2 cl, 6 dwg

FIELD: electricity.

SUBSTANCE: electric motor comprises a body (1), where a stator yoke (2) is placed with explicit-pole teeth (3), excitation coils (4) from a winding wire with polyimide-fluoroplastic insulation. On a shaft (6) there is a rotor (7) mounted with similar teeth (8) without a winding by number by two teeth less than on the stator. Between the teeth (3) of the stator and teeth (8) of the rotor there is a non-magnet working gap (10), along which cooling sea water passes. To prevent contact corrosion of electric steels of packages of the stator, rotor, body and shaft, discs (11) from magnesium alloy are pressed onto free ends of the rotor shaft, and between the stator teeth there are tyre treads (5) pressed from the same alloy. Discs (11) and tyre treads (5) have a tight electric contract with packages of the rotor (7) and the stator (2).

EFFECT: higher reliability, operability, durability and energy characteristics of valve-inductor electric motors of open design by higher efficiency of electrochemical protection of inner active parts against contact corrosion with their submersion into sea aggressive water - electrolyte.

3 dwg

FIELD: electricity.

SUBSTANCE: stabilised axial contact-free DC generator comprises a body, a subexciter, an exciter, the main generator and a voltage controller. According to this invention, the voltage controller is installed in the lower part of the generator body and comprises an electromagnet, to the anchor of which a spring is rigidly fixed, and a coal pillar, assembled from a row of coal washers laid onto each other and compressed with a spring. At the same time the working winding of the electromagnet in the voltage controller is connected to the generator outlet, and the coal pillar is included into the circuit of the exciter excitation winding, at the same time resistance of the coal pillar depends on the force of compression of coal washers with the specified spring.

EFFECT: expanded area of application of a generator due to provision of rectified voltage stabilisation.

3 dwg

FIELD: electricity.

SUBSTANCE: in a single-key electric drive a DC voltage source consists of two independent voltage sources (1) and (2), at the same time the plus of a source (1) is connected to the plus of a capacitor (3), with the start of a part (4) of a winding and a cathode of a diode (5). The minus of the source (1) is connected with the first output of a semiconductor key (6), with the minus of the capacitor (3) and with the start of a part (7) of the winding. The plus of a source (2) is connected to the second output of the semiconductor key (6), with the plus of a capacitor (8) and the end of the part (4) of the winding. The minus of the source (2) is connected with the minus of the capacitor (8), the end of the winding part (7) and the diode (5) anode.

EFFECT: higher reliability of an electric drive by elimination of asymmetry of supply to parts of a stator winding in a valve-inductor motor.

2 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: invention refers to design of contactless magnetoelectric machines with electromagnetic reduction, and can be used in direct drives, in automation systems, in mechanisms with high moments on the shaft and low rotation frequencies of the shaft, as well as high-frequency electric generators and synchronous frequency converters. The proposed reduction magnetoelectric machine with pole gear-type inductor includes stator, the armature core of which is charged and has salient poles, on inner surface of which elementary teeth are made, coil m-phase armature winding, each coil of which is arranged on the corresponding salient pole of the armature, one on each pole, and rotor containing an inductor with toothed poles with equal number of elementary teeth on each pole, which are symmetrically distributed along cylindrical surface; constant magnets magnetised in tangential direction are located between toothed poles of the inductor. When performing certain relations between the number of salient poles of the armature, number of elementary teeth on salient pole of the armature, number of salient armature poles in the phase, total number of armature teeth, number of toothed poles of the inductor, total number of inductor teeth, number of elementary teeth on toothed pole of the inductor and number of phases of m-phase armature winding of reduction magnetoelectric machine with pole toothed inductor, the method is implemented.

EFFECT: providing high power and operating characteristics, high specific torque moment on the shaft and high electromagnetic reduction of rotation frequency in electric motor mode, as well as high specific power at high EMF frequencies in electric generator mode.

5 cl, 5 dwg

Electric motor // 2476977

FIELD: electricity.

SUBSTANCE: electric motor comprises a salient-pole stator with a control winding and a rotor with poles from permanent magnets arranged on ends and adjacent parts of side surfaces of a rotor magnetic conductor. Between adjacent magnets of the rotor pole arranged on the end and adjacent parts of side surfaces of the rotor magnetic conductor, additional magnets are introduced, polarity of which matches polarity of the rotor pole.

EFFECT: higher efficiency of operation of a magnetic system of an electric rotor and its specific torque and efficiency increase.

1 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

Electric machine // 2474945

FIELD: electricity.

SUBSTANCE: electric machine comprises a tight body, in the cavity of which a laminated stator core is installed with open slots, where winding coils are arranged, and a rotor. At the same time the laminated stator core is equipped with radial packet-to-packet ventilation channels, aerodynamically communicated longitudinal channels of the body with inlet holes communicated via a filter with environment, conductors of the winding of each stator slot are fixed with a wedge and a key insert contacting with it, the cross section of which is arranged as capable of fixing the key insert back under the slot wedge, and the section of the ledge corresponds to the section of the slot splint, the surface of the key insert back along its entire length is equipped with a longitudinal chute communicated with packet-to-packet ventilation channels of the stator core, volumes of key inserts protruding above the surface of the stator core cavity are combined into a tubular bushing, preferably made from segments, with formation of the inner surface of cylindrical shape, besides, in the cavity of the body there are cylindrical bushings installed, the diameter of the cavity in which is equal to the diameter of the tubular bushing, between ends of the stator core and ends of cylindrical bushings facing them there are thrust rings installed, the cavity of which exceeds the diameter of the cylindrical cavity of the stator core, equipped with a collar, covering a part of the outer surface of the cylindrical bushing. Thrust rings are made of non-magnetic material and are fixed with a stator core, cylindrical bushings are installed as capable of radial displacement relative to the longitudinal axis of the cylindrical cavity of the stator core, for this purpose contacts of bushings with the body, end shield and thrust rings are equipped with sealing rings made with the possibility of elastic deformation radially and along the relatively longitudinal axis of the stator core. The electric machine comprises an inductor with the outer cylindrical surface made of poles, permanent magnets, non-magnet wedges, a shaft, the length of which exceeds the length of the inductor, besides, with the inductor ends there are end cylindrical bushings fixed rigidly, which are made of a non-magnetic material and arranged aflush with the outer surface of the inductor.

EFFECT: invention provides for minimum sagging of a rotor, improved cooling of a rotor and a stator winding with simultaneous reduction of weight and dimension indices and higher resources of electric machines, including those operating under higher and high frequencies of rotation.

3 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: invention describes direct rotation generator that includes holder of iron cores and rotating shaft arranged on holder of iron cores. The first and the second rotating discs are located on two corresponding ends of rotating shaft. The first iron core is located on holder of iron cores, and the first winding is located at the periphery of holder of iron cores. The first sealing plate is located on the first rotating disc; the first magnet is located on the first rotating disc or on the first sealing plate, and surface of the first magnet and surface of the first sealing plate share one surface. The fourth magnet is located on the second rotating disc. The first magnet and the fourth magnet correspond to two ends of the first iron core, and poles of the first and the fourth magnets, which face each other, are opposite. One end of the first iron core includes liquid tank that is filled with magnetic liquid; at that, end of the first iron core, which is filled with magnetic liquid, contacts the first sealing plate. The main magnetic flux of direct rotation generator and magnetic flux created with induced current are horizontal and parallel to iron core, which considerably reduces the impact of resistance on rotation of iron core and magnets.

EFFECT: saving of energy for generation of electric energy and increase in generator efficiency.

10 cl, 5 dwg

FIELD: electricity.

SUBSTANCE: in the method to control a frequency-controlled induction electric drive with a short-circuited rotor there is a setter used arranged as a relay controller, from which a signal of optimum accuracy arrives to an input of frequency converter speed control. A tracking system comprises a frequency converter implementing vector control, an induction motor with a short-circuited rotor. The setter comprises a sensor of phase currents, a sensor of instantaneous speed signal value, a sensor of phase voltages, a converter of current phase number, a vector-analyser, a converter of voltage phase number, rotators of current and voltage, a unit of parametric coefficients, a unit of switching function coefficients, a unit of summators, a unit of multiplication, a summator, a unit of setting signals, a unit to produce a setting signal for rotor flux linkage and an appropriate coefficient of PI-controller, a unit to produce a setting signal for rotor flux linkage and an appropriate PI-controller coefficient, a relay with high switching frequency, a scaling unit, a multiplier, a selector and a switch connected as specified in application materials.

EFFECT: production of control of optimum accuracy over speed of shaft rotation in a frequency-controlled asynchronous electric drive with a short-circuited rotor.

2 cl, 1 dwg

Electric motor // 2454774

FIELD: electricity.

SUBSTANCE: electric motor (1) consists of the first structure (4) that includes some magnetic poles formed by a certain sum of magnetic poles (4a) organised in certain direction and arranged in such a way that every two neighbouring magnetic poles (4a) have polarity that differ from one another, the second structure (3) that includes some armatures located opposite to the said magnetic poles for generating movable magnetic fields moving in certain direction between the row of armature and row of magnetic poles under the influence of certain sum of armature magnetic poles generated in the armatures (3c - 3e) at electric power supply to them, and the third structure (5) that includes a row of elements from magnetic-soft material formed by certain sum of elements (5a) from magnetic-soft material organised in certain direction with a one gap in relation to the other and arranged in such a way that a row of elements from magnetic-soft material is located between a row of magnetic poles and a row of armatures, number of magnetic poles (4a) and number of elements (5a) from magnetic-soft material is determined by the ratio 1 : m : (1 + m)/2 (m ≠ 1.0).

EFFECT: decrease of dimensions and manufacturing cost of the said electric motor with simultaneous provision of possibility to increase freedom degree at its designing.

6 cl, 19 dwg

FIELD: electricity.

SUBSTANCE: axial two-input contactless dynamo includes body, permanent multipolar magnet of induction coil subexciter, lateral axial magnetic conductor with polyphase armature winding of subexciter, single-phase winding of subexcitor and auxiliary excitation winding of exciter which is connected to DC power supply source through contacts, inner axial magnetic conductor with polyphase armature winding of exciter and single-phase excitation winding of main generator, lateral axial magnetic conductor with polyphase armature winding of main generator, shaft fixed in bearing assemblies and rigidly bound with permanent multipolar magnet of induction coil subexciter and inner axial magnetic conductor by means of respective discs. Single-phase excitation winding of exciter is connected to polyphase armature winding of subexciter through polyphase double-wave rectifier. Single-phase excitation winding of main generator is connected to polyphase armature winding of exciter through polyphase double-wave rectifier.

EFFECT: possibility of adding and conversion of mechanical power and DC electrical power into AC polyphase electrical power, simplification of magnet system manufacturing technology, quality improvement of generated voltage.

1 dwg

FIELD: electricity.

SUBSTANCE: electric machine rotor comprises a hollow shaft of non-magnetic material and a cylinder placed on it made of magnetic-soft material with high magnetic permeability, in longitudinal radial slots of which there are permanent magnets fixed with non-magnet metal wedges, the outer surface of which complies with curvature of the outer surface of the cylinder, at the same time, according to this invention the cylinder is rigidly fixed to the hollow shaft and non-magnet metal wedges along the entire area of their contacts, and rotor ends are rigidly fixed with cylindrical bushings made of non-magnetic material, coaxial and rigidly fixed with the hollow shaft, besides, cylindrical bushings are equipped with through bores aligned in parallel to the longitudinal axis of the cylinder, at the same time the through bores match longitudinal radial slots of the cylinder in quantity and location and exceed their dimensions by the value sufficient for free passage of permanent magnets through them, besides, the permanent magnets are equipped with facilities of their fixation in longitudinal radial slots of the cylindrical bushings, besides, the external surface of the cylinder is equipped with a bandage made by winding of a flexible thread from high-strength non-magnetic material, for instance, a carbon fibre, at the same time the external surface of the bandage is of cylindrical shape that complies in diameter and roughness to the specified cylindrical bushings. Threads in the bandage are fixed by impregnation with hardening synthetic resins. Facilities for fixation of permanent magnets in longitudinal radial slots of the cylinder are made of parts from non-magnetic material that follow the cross section of through bores in the cylindrical bushings and are tightly installed in the through bores, in contact with the ends of the permanent magnets. Besides, the free end of at least one cylindrical bushing is closed with a screwed-in or a pressed cover. Besides, to fix the rigidly connected parts of the rotor, vacuum-diffusion welding is used.

EFFECT: considerable improvement of the electric machine rotor mechanical strength, increased resource during its operation at increased and high frequencies of rotation due to arrangement of the gas bearing between the bushing placed in the stator and fixed in the end shields, and the rotor, which provides for the possibility to reject frictionless bearings, this electric machine rotor does not have sagging, since the rotor surface is used as the journal.

5 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: electric machine rotor comprises a hollow shaft of non-magnetic material and a cylinder placed on it made of magnetic-soft material with high magnetic permeability, in longitudinal radial slots of which there are permanent magnets fixed with non-magnet metal wedges, the outer surface of which complies with curvature of the outer surface of the cylinder, at the same time, according to this invention the cylinder is rigidly fixed to the hollow shaft and non-magnet metal wedges along the entire area of their contacts, and rotor ends are rigidly fixed with cylindrical bushings made of non-magnetic material, coaxial and rigidly fixed with the hollow shaft, besides, cylindrical bushings are equipped with through bores aligned in parallel to the longitudinal axis of the cylinder, at the same time the through bores match longitudinal radial slots of the cylinder in quantity and location and exceed their dimensions by the value sufficient for free passage of permanent magnets through them, besides, the permanent magnets are equipped with facilities of their fixation in longitudinal radial slots of the cylindrical bushings.

EFFECT: considerable improvement of the electric machine rotor mechanical strength, increased resource during its operation at increased and high frequencies of rotation due to arrangement of the gas bearing between the bushing placed in the stator and fixed in the end shields, and the rotor, which provides for the possibility to reject frictionless bearings, this electric machine rotor does not have sagging, since the rotor surface is used as the journal.

4 cl, 4 dwg

FIELD: electrical engineering; mechanical design of commutatorless magnetoelectric machines.

SUBSTANCE: rotor magnetic system has more than two magnetically permeable steel laminations with pole horns formed by prismatic tangentially magnetized N-S permanent magnets placed inside laminated stack; inner and outer diameters of laminations are uninterrupted and rectangular prismatic magnets are installed inside them so that distance over outer arc between external planes of two adjacent magnets of unlike-polarity poles is shorter than that over internal arc between same planes; magnets do not contact one another and have at least one projection on inner diameter for coupling with rotor shaft.

EFFECT: enhanced manufacturability.

3 cl, 2 dwg

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