Low-speed end synchronous generator
SUBSTANCE: low-speed end synchronous generator comprising a rotor arranged in the form of a disc from a non-magnetic material with an excitation system based on permanent magnets and a stator with coils, comprises sections, at the same time in each section a stator is made of one circular magnetic conductor arranged in parallel to the rotor and fixed on stiffening ribs of a casing-free generator frame, coils of stator are placed fully in slots, not protruding beyond limits of a magnetic conductor, in an excitation system the permanent magnets are installed on a rotor disc at its one lateral side in parallel to a magnetic conductor of a stator, besides, rotors of each section are arranged on a single shaft, at the same time to coordinate operation of generator sections, a rotor of each following section is displaced relative to the rotor of the previous section by the following angle: Jmag. = 360° : quantity of permanent magnets of the rotor: quantity of generator sections.
EFFECT: reduction of dimensions due to its execution of several sections, considerable reduction of generator diameter, which is especially important for submersible mini hydraulic power plants, reduction of generator weight due to the fact that its units are fixed on the frame of stiffening ribs, and a rotary rotor is equipped with a protective rim, which eliminates the necessity to use a solid casing, increased efficiency factor due to complete usage of stator coil turns placed fully in slots of a magnetic conductor and not having head parts protruding beyond its borders, making it possible to modify generator low speed when used on rivers with various speed of water flow, which is provided by variation of sections number and displacement of a rotor in each section relative to a rotor of a previous section by an angle between magnets, increased reliability of generator's operation, since availability of a frame from stiffening ribs improves cooling of stator coils protecting them against heating.
The invention relates to electrical engineering, namely to improve the construction of synchronous generators, which can be used in wind farms, as well as in submersible mini-hydropower plants.
Known synchronous generator (1)containing a rotor with excitation from permanent magnets and a stator with coils placed on the rods around the circumference of the magnetic core.
The placement of the coils on half of the long stem leads to underutilization of the steel core, which ultimately prevents dramatically improve weight and dimensions of the generator.
Closest to the claimed generator is a synchronous electric generator (2)containing a double stator, i.e. the stator, consisting of two parts with the annular magnetic cores arranged coaxially and parallel to each other, between which is placed a disk of the rotor excitation system consisting of permanent magnets installed on the disk of non-magnetic material symmetrically, the same poles face each other. In the radial slots of the magnetic circuit of the stator around the circumference of the stacked coil, connected to each other, forming the stator winding, and the frontal part of the coils are at the side plane of the magnetic circuit.
This generator has a large m is sahabatnya performance and low efficiency.
The technical result of the claimed technical solution is as follows:
- reduce size by executing it from several sections, greatly reducing the diameter of the generator, which is especially important for submersible mini-hydropower plants.
- to reduce the mass, as the nodes of a generator mounted on the frame of the ribs, and a rotatable rotor provided with a protective rim, i.e. there is no solid body.
improve efficiency through full utilization of turns of the stator coils placed completely in the slots of the magnetic core and having protruding end parts outside,
- you can change ticketnest generator when it is used on rivers with different flow rate of water by changing the number of sections and offset of each rotor section of the rotor of the previous section on the angle between the magnets - J.,
- to improve the reliability of operation of the generator, as the presence of a skeleton of ribs improves the cooling coils of the stator, preventing them from overheating.
The technical result is achieved by the fact that the low speed end synchronous generator containing the rotor is made in the form of a disk of non-magnetic material with the excitation system permanent magnet, and a stator with coils, consists of sections, with each section of the stator to perform the Yong one annular magnetic core, located parallel to the rotor and fixed to the ribs of the frame open frame generator, coils of the stator are placed completely in the slots, not speaking outside of the magnetic circuit, the excitation system permanent magnets located on the rotor disc with one side parallel to the magnetic circuit of the stator, and the rotor of each section are located on the same shaft, with the consistency of the sections of the generator rotor of each of the following sections are offset from the rotor of the previous section on the corner
J.=360°: the number of permanent magnets of the rotor: the number of sections of the generator. The main features of the design of the generator is that the generator is made in the form of a set of sections, each of which has a stator and a rotor. Sections mounted on the same shaft. A stator fixed to the frame formed from the ribs, which provides more efficient cooling of generator parts, increasing reliability and significantly reducing the weight of the generator.
1 shows a generator section (shown two sections in section);
Figure 2 - stator consisting of a magnetic core 7 and the coil 8;
Figure 3 is a rotor with permanent magnets 2.
The generator consists of sections. Each section of the generator (1) includes a rotor and a stator. The rotor is constructed in the form of a disk 1 of non-magnetic material is a, for example, aluminum with built-in magnets 2 made of magnetic steel. On the rotor there is a steel ring 3 for securing the rotor disc. Disc 1 of the rotor ring 3 is pressed on the sleeve 4. The ring 3 is attached to the disk 1 and the sleeve 4 by welding 5. Each section of the generator has a protective steel rim 6. The stator consists of a magnetic core 7 and a coil 8, the magnetic core 7 is fixed on the ribs 9 of the frame and is made of electrical steel tape. The rotors of all sections of the generator mounted on a common shaft 10, mounted on bearings 11 with offset around the circumference of one rotor relative to the other in each section, and the rotation of the rotor of one section relative to the other rotor section is carried out by rotation of the sleeve 4 on the shaft 10 by fixing it in the desired position locking screw 12. The angle of rotation of the rotors relative to each other (J.) for coordinated operation of the sections of the generator is determined as follows. For example, the rotor has eight symmetrically spaced magnets. The angle between the magnets will be
For example, in our generator four sections, hence the offset angle of the rotor sections will be
If we need to increase ticketnest generator, then add in the generator, for example, two sections, then the offset angle rotors all the operations will be
Therefore, for the generator of the six sections, the rotor of which eight symmetrically spaced magnets, the rotor of the second section moves relative to the rotor of the first section at an angle J.=7,5°, the rotor of the third section moves relative to the second rotor section at the same angle J.=7,5°, etc. Coils of the stators in the sections of the generator are identical relative to each other. All metal parts in the generator galvanized, and the coils in the magnetic core epoxy.
The generator works as follows.
The primary engine, such as turbine mini-hydro power plants, causes the rotation of the rotor sections of the generator, where the magnetic field of the permanent magnet traverses the coils of the stator coils and induces EMF in them.
Generator with reduced weight and performance, higher efficiency and more reliable, allowing you to change ticketnest when used on rivers with different flow rates of water, will find industrial application.
Sources of information
1. Synchronous electric generator, ed. mon. USSR N 1169094, B. I. N 27, 1985
2. Multi-pole low-speed end synchronous generator, patent RU 2152118, MPK-7, NC 19/16, NC 23/54.
Low-speed end synchronous generator containing the rotor is made in the form of a disk of non-magnetic material is with excitation system permanent magnet, and a stator with coils, characterized in that the generator consists of sections, with each section of the stator is made of one annular magnetic core located parallel to the rotor and fixed to the ribs of the frame open frame generator, coils of the stator are placed completely in the slots, not speaking outside of the magnetic circuit, the excitation system permanent magnets located on the rotor disc with one side parallel to the magnetic circuit of the stator, and the rotor of each section are located on the same shaft, with the consistency of the sections of the generator rotor of each of the following sections are offset from the rotor of the previous section on the angle J.=360° : the number of permanent magnets of the rotor : the number of sections of the generator.
FIELD: electrical engineering.
SUBSTANCE: device refers to the wind energy, pacifically to the wind-energy equipment, designed to charge accumulator batteries and power supply for various recipients. The device contains a motionless stator winding solenoid type and two rotors made of nonmagnetic materials. Rotors have disk form and are placed in axial alignment. The same even number of permanent magnets is distributed on each rotor. Stator winding is reeled on the wind powered generator's axis and is placed between the two cylindrical cores made of the ferromagnetic materials. Large-diameter core is fasten from the outside in the body frame. Both rotors are placed on a single spindle which is connected to the wind wheel and has the ability to rotate in the bearing assemblies. The permanent magnets have a Pi shape. Their poles are placed in axial alignment on each of the rotor and are directed in a heteropolar manner towards each other. Each of the permanent magnets is with heteropolar alternating poles on each rotor has the ability of axial alignment placement with cylindrical core ends. Cylindrical core ends have serrate shape with number of serratures half as less as a number of the permanent magnets. Serratures are placed in axial alignment to each other.
EFFECT: enhanced directed EMF in the stator winding and facilitated stator manufacturing technology.
FIELD: power industry.
SUBSTANCE: double-rotor tooth wind-driven generator includes stationary stator winding of solenoid type, as well as two rotors from non-magnetic material. Rotors are made in the form of discs and located coaxially. Equal even number of constant magnets is distributed uniformly on each rotor. Stationary stator winding of solenoid type is wound along axis of wind-driven generator and located between two cylindrical cores from ferromagnetic material. Core with larger diameter is fixed with its outer side in the housing. Both rotors are arranged on one shaft. Shaft is connected to wind wheel and has the possibility of being rotated in bearing supports fixed in the housing. Constant magnets are U-shaped, and their poles are located coaxially on each of the rotors and directed unipolar to each other. Each of constant magnets has the possibility of coaxial rotation with edges of cylindrical cores. Edges of cylindrical cores have tooth shape with number of teeth equal to number of constant magnets. Teeth of one edge of cylindrical cores are coaxial to slots of other edge of cylindrical cores. In each slot there located is connection strap from ferromagnetic material, which connects both cores.
EFFECT: increasing EMF induced in stator winding and simplifying the manufacturing procedure of stator winding.
SUBSTANCE: in the proposed design of the unipolar electric machine (UM) the electric contacts are electroconductive roller swinging contacts and fixed cylindrical cartridges, to which electric conductors are soldered. Such design of electric contacts without high complexity makes it possible to electrically serially connect all their rotor discs into the anchor circuit, which allows increasing of working voltage. At the same time the swinging friction between electroconductive rollers and fixed cylindrical cartridges, and also active parts of rotor discs (hubs) is incomparably less than sliding friction between conventional sliding brush contacts and contact rings.
EFFECT: improved electromechanical characteristics, increased reliability of operation, increased wear resistance, simplified design, increasing working voltage of the unipolar electric machine several times, expansion of its field of application.
SUBSTANCE: in proposed magnetoelectric generator the rotor of which is provided with constant magnets (3) and (4), and stator contains two parallel plates (5) and (6), between which annular windings (7) are arranged, according to this invention the rotor is made of two parallel discs (1) and (2) fixed on shaft, on each of which ring-shaped rows of constant magnets (3) and (4) are arranged on surfaces facing each other and located in each row at equal distance; polarity of constant magnets of each row alternates. At that, poles of constant magnets of one row face opposite poles of constant magnets of other row, and annular windings (7) of stator are made in the form of equal trapezoids the lateral sides (8) and (9) of which are located radially relative to rotor rotation axis, and sections (11) and (12) of annular windings (7) in bases of trapezoids are bent through an arc; annular windings (7) are inserted into each other in pairs. At that, distance ℓ between sections (11) and (12) of annular windings (7) in bases of trapezoids exceeds width b of ring-shaped row of constant magnets.
EFFECT: increasing efficiency coefficient and reducing starting moment of generator, and decreasing noise level during generator operation.
FIELD: engines and pumps.
SUBSTANCE: in compliance with first version, permanent magnets and electromagnets are arranged on two disks fitted on shaft. Note here that first disk with lower moment of inertia supports permanent magnets while second disk support electromagnets. Note also that retainers to fix disk position and adjust their pitch in rotation are fitted on both disks. In compliance with second version, electromagnets and said both retainers are arranged on both disks fitted on shaft.
EFFECT: simplified design, stable operation at low rpm.
2 cl, 2 dwg
SUBSTANCE: invention refers to the field of electric engineering, in particular, - to electric machines, and relates to arrangement of motors with transverse flow used, in particular, in the field of aviation. In proposed motor with transverse flow the rotor has several rings of permanent magnets arranged along axis next to each other, formed by separate magnets with magnetic orientation alternating in radial direction. Stator has several coils oriented coaxially relative to rings of permanent magnets of rotor. Each of coils of stator has two connections and on its side that faces rotor is covered with poles that enter into each other, which face rings of permanent magnets of rotor. Each of poles is located on the same line with one of separate magnets. Controlled active source of reactive power has two connections for each coil, with which according stator coil is connected. Control device in case of failure in one or several coils of stator generates control signals for active sources of reactive power so that two connections of according stator coil are connected to each other in a low-ohm manner. Besides, proposed motor with transverse flow may be used as start generator for turbomotor, and at the same time it is connected without possibility of rotation with rotary shaft of turbomotor.
EFFECT: provides for high own reliability in operation of motor with transverse flow with simultaneous provision of possibility to change it into safe condition in case of faults.
16 cl, 4 dwg
SUBSTANCE: proposed face-type electrical machine includes two pairs of packages containing stators of different diametres, which are shifted in axial direction with regard to each other, and two pairs of packages containing rotors of different diametre, which are shifted in axial direction with regard to each other. In addition, one pair of large diametre stator packages is installed on inner surface of machine housing, one pair of minor diametre stator packages is installed on end bracket. Rotor packages are provided with poles represented as permanent magnets and installed on common basis so that poles of minor diametre rotor packages are faced to the working surfaces of minor diametre stator packages, and poles of the pair of large diametre rotor packages are directed to the working surfaces of the pair of large diametre stator packages.
EFFECT: increased specific power of face-type electrical machine and increased power in radial dimensions.
SUBSTANCE: proposed axial contactless direct current generator contains a housing, a subexciter, an exciter and the main generator. The permanent magnets of the subexciter inductor and the magnetic conductors in the grooves whereof the windings of the subexciter, the exciter and the main generator are laid are designed to be axial. The side axial magnetic conductors are rigidly mounted inside the housing while the permanent magnets of the subexciter inductor and the inner axial magnetic conductor are rigidly mounted on a shaft so that to be capable of rotation relative to the side axial magnetic conductors. The permanent magnets of the subexciter inductor are mounted on the butt-end of one side axial magnetic conductor while the inner axial magnetic conductor is mounted between the side axial magnetic conductors. The inner axial magnetic conductor and the side axial magnetic conductor on the butt-end whereof the permanent magnets of the subexciter inductor are mounted have two active but-end surfaces with grooves while the other side axial magnetic conductor has one active but-end surface with grooves. Laid in the grooves of the side axial magnetic conductor with two active but-end surfaces on the side of the permanent magnets of the subexciter inductor is a single-phase exciter excitation winding connected to the subexciter operational winding via a multi-phase double half-period rectifier. Laid in the grooves of the inner axial magnetic conductor on the side of the exciter excitation winding is a multi-phase exciter operational winding while on the other side a single-phase main generator excitation winding is laid connected to the exciter operational winding via the multi-phase double half-period rectifier. Laid in the grooves of the side axial magnetic conductor with a single active but-end surface is a multi-phase main generator excitation winding connected to the multi-phase rectifier.
EFFECT: generator manufacture technology simplification and generated voltage quality improvement.
FIELD: electric engineering.
SUBSTANCE: proposed disk electric machine comprises inductor and anchor, every of which includes a set of disks, which form common set of electric machine disks, at the same time anchor disks are made of non-magnetic dielectric material and contain magnetic elements that create magnetic flow of anchor, and disks of inductor are made of non-magnet material, and comprises magnetic elements, which create magnetic flow of inductor, besides magnetic elements are located in each disk radially at identical angle, and to each other so that axis of electric machine rotation is parallel to vector of magnetisation of each magnetic element, and directions of magnetisation vectors of two near magnetic elements arranged on a single disk are opposite, besides number of magnetic element in each disk is identical and even. Also electric machine comprises closers of magnetic flow, which are arranged in the form of solid disks from soft magnetic material and are located on sides of common disks set. According to invention, magnetic elements of inductor are made of permanent magnets, magnetic elements of anchor disk are arranged in the form of wave winding with working sections arranged mostly radially in zone of location of magnetic elements of inductor and closed between each other with front sections.
EFFECT: increased specific power and reliability of disk electric machine.
6 cl, 3 dwg
FIELD: electric engineering.
SUBSTANCE: invention relates to design peculiarities of low-speed generators of stabilised AC pulses and is intended for use in small power engineering as source of alternating current in case of emergency disconnection or full unavailability of power supply in composition of power generating using energy of natural events, operating in low-speed and unstable modes. In proposed end electric AC generator with stator assembled from coil groups fixed in its frame and rotor of two disks fixed on shaft and arranged near ends of stator and comprising magnetic system of permanent magnets, poles of magnetic system face stator coils, according to invention, the element that induces EMF in each stator coil is diametrically magnetised ball installed inside each coil, with the possibility of free rotation, from high-energy magnetic material (MB), magnetic fields of which may interact with magnetic fields of rotor. Specified MB turn at each step of rotor in planes that are radial to axis of its rotation clockwise or counterclockwise, depending on direction of rotor rotation. Each MB, rotating, induces EMF in coil, where it is located, being per se an independent rotor in each generating module of stator. Provided that time of each half-turn of MB is less or equal to time of each rotor step variation, magnetic system of rotor will set identical moment of MB rotation, stabilising EMF pulse induced by them.
EFFECT: simplified design, reduction of weight, dimensions and specific cost of power generating systems with provision of alternating current generation with required voltage in low-speed and uneven mode with efficiency factor comparable to traditional systems of electromechanical transformation.
2 cl, 6 dwg
SUBSTANCE: electromechanical converter comprises at least one stator-rotor pair, where a stator comprises cores from material with high magnetic permeability, with their ends attached to a support stator ring and aligned in parallel to the main magnetic flow, and between which there are conductors of a multiphase winding, a rotor is made in the form of two coaxially arranged outer and inner inducers - magnetic conductors from material with high magnetic permeability in the form of hollow cylinders fixed as capable of rotation relative to the stator, bearing poles arranged along circumferences with alternating polarity, inverted to the stator via working gaps and covering it, at the same time polarity of poles arranged on the inner and outer inducers opposite to each other is arranged as matching, and number p of pole pairs and number Z of stator cores are related by certain ratios for a double-phase winding (m = 2) and for a triple-phase winding (m = 3).
EFFECT: expanded field of application of an electromechanical converter, simplification of its design with simultaneous increase in accuracy of stator winding phase switching moments, lower requirement to sensitivity of used sensors of rotor angular position and their stability, provision of more accurate moments of phases switching and simplified control operations in production and diagnostics of the converter.
10 cl, 2 dwg
SUBSTANCE: suggested alternate current generator consists of stator including two laminated stacks with polyphase winding pressed-in into massive magnet core, stationery field between laminated generator stacks and rotor with shortened poles. At that poles are made as permanent magnets with radial magnetisation and shortening in axial direction; shortening for poles of different polarity is made at opposite sides and insert made of soft magnetic material is added at point of shortening; number of rotor poles differs from number of stator teeth per one or two; stator winding consists of coils and each coil is slipped on two teeth of both laminated stacks located opposite each other.
EFFECT: enhancement of generator performance and possibility to obtain voltage with higher frequency at low rate of generator rotation.
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
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
FIELD: machine building.
SUBSTANCE: invention refers to inverter generator equipped with unit of generator with internal combustion engine drive wherein there is facilitated elimination on non-linear harmonic distortion to maximal allowed degree from output value of alternate current. According to the claimed invention there is a unit of the electric machine generator generating alternate current, a converter converting alternate current into direct one, an inverter transforming direct current into alternate one, a control unit of the inverter controlling key elements by means of POM-signal generated with usage of a reference sinusoidal signal and having a shape of wave of required output voltage, and also bearing signal. There are introduced a current metre for measuring alternate current supplied for electric loading, a device computing gain factors for calculation of gain factors Gn on base of measured current (where n = 2, 3, 4, 5, 6…m) of n-harmonics of the reference sinusoidal signal, and a regulator of the reference sinusoidal signal controlling this signal at a value of sum obtained on base of calculated gain factors Gn. According to the second version there is the unit of the generator driven form the internal combustion engine and generating alternate current, the converter connected to the unit of the generator and converting alternate current into direct one, the inverter connected to the converter and transforming direct current into alternate one and equipped with key elements for supply of electric loading, and the control unit of the inverter controlling the key elements by means of POM signal generated with usage of the reference sinusoidal signal. According to the claimed invention alternate current supplied for electric loading is measured; there are calculated gain factors Gn (where n=2, 3, 4, 5, 6…m) of n-harmonics of the reference sinusoidal signal, and the reference sinusoidal signal is regulated at value of sum obtained on base of calculated gain factors Gn.
EFFECT: conversion into alternate current of specified frequency by means of POM signal and control of reference sinusoidal signal for reliable elimination of constituents of non-linear harmonic distortion from signal of output voltage.
10 cl, 8 dwg
SUBSTANCE: electric machine comprises a stator (4) and a rotor (9), arranged in parallel and matched relative to a common central axis (8) with gaps (10) without touch of active sides of the rotor (9) and the stator (4), a frame (1), made of two bases (2), connected to each other by means of elements (3) as a whole. On each base (2) there is one part of the stator (4) on supports (5) from non-magnet and dielectric material. On bases (2) there are sliding supports (7), matched with a common central axis (8) to limit axial and radial movements of the rotor (9) relative to parts of the stator (4) and to fix gaps (10) between active sides of the stator (4) parts and the rotor (9). Depending on technical parameters of a working machine, the electric machine comprises a block of electric machines matched relative to the common central axis (8). Availability of additional sliding supports (11) and (12) in the electric machine design makes it possible to align an electric machine with any arrangement of a working shaft (22), to minimise gaps (10) between active sides of rotors (9) and stators (4), which results, as specified above, in reduction of ferrous and non-ferrous metals consumption, and also of a total weight of the electric machine. Switching of the stator (4) parts winding outputs has a multiple-version solution.
EFFECT: increased technical parameters and reduced weight of the electric machine with provision of its operation possibility as an electric energy generator, saving of ferrous and non-ferrous metals.
5 cl, 3 dwg
SUBSTANCE: electric generator (EG) includes housing with detachable covers, housing of inductor also with detachable covers made as an integral part of hollow shaft. Electromagnets with cores and coils are installed on inductor housing. Inductor assembled with electromagnets and covers is installed on bearings arranged in covers of EG housing. Two armatures are installed in EG, one of which is fixed, and the other one is movable, or one is movable with possibility of its rotation inside inductor. Windings of fixed armature are fixed in slots of detachable EG housing, and windings of movable armature are fixed in slots of armature housing made as an integral part of shaft and installed inside inductor by means of bearings on brackets fixed on EG base. Between inductor and movable armature there installed is reduction gear which provides simultaneous synchronous rotation of inductor and armature in opposite directions or as per simplified scheme, or with possibility of automatic control of rotation frequency of inductor and armature, and the condition at which the ratio of speeds of opposite rotation of inductor and armature Vi/Va=const is met in both cases.
EFFECT: higher quality of voltage supplied to electric mains, higher EG capacity, operating reliability, reducing material consumption, reducing manufacturing cost of EG, and enlarging application field.
8 cl, 5 dwg
SUBSTANCE: in proposed invention having generator unit driven from internal combustion engine, the throttle gate of which is moved by means of drive actuator, and producing alternating current; converter converting alternating current to direct; inverter converting direct current to alternating, which is equipped with key elements for supply of electric load, there introduced is voltage/current metre to measure voltage and current, which are supplied to electric load; computing device of power factor, which has the possibility of computing the power factor on the basis of measured voltage and current values; evaluation device of load power, which has the possibility of evaluating the load power on the basis of at least measured current value and calculated power factor; and control device of drive actuator, which has the possibility of operation of actuator so that rotation frequency of motor can be equal to the required rotation frequency of motor. The second version includes generator unit driven from internal combustion engine, the throttle gate of which is moved by means of drive actuator, and generating alternating current; converter converting alternating current to direct; inverter converting direct current to alternating, which is equipped with key elements for feed of electric load, in the proposed invention there measured is voltage and current, which are supplied to electric load; power factor is calculated on the basis of measured voltage and current values; evaluation of load power is performed on the basis of measured current value and calculated power factor; required rotation frequency of motor is determined on the basis of obtained evaluation of load power; and drive actuator is controlled by the mechanism so that rotation frequency of motor can be equal to required rotation frequency of motor.
EFFECT: inverter generator allows evaluating power of loads on the basis of load power coefficient and increasing the number of loads to maximum with low power factor, which can be started at connection to output of generator of nominal power; improvement of response at control of rotation frequency of motor.
12 cl, 8 dwg
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
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: electrical engineering; electric generators.
SUBSTANCE: proposed generator that has stator and rotor is characterized in that its rotor has ring mounting separate cores with pole shoes and field coils connected to dc power supply and that stator has frame mounting separate cores with pole shoes and running winding coils connected through series-interconnected rectifier, buffer storage, and matching transformer to output terminals; rotor and stator have equal number of cores; effective surfaces of stator and rotor pole shoes arranged, respectively, over arcs of two radii drawn from rotor center are facing each other and are mounted in a spaced relation to each other.
EFFECT: improved power characteristics and simplified design.
2 cl, 5 dwg