Three-phase asynchronous electric motor |
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IPC classes for russian patent Three-phase asynchronous electric motor (RU 2478249):
  
 Method of vacuum-pressure impregnation and baking high-voltage lead terminal insulation / 2362227
Invention relates to electrical engineering, particularly to the method of making high-voltage lead terminals. Channels are made in the electrically conducting element of a lead terminal, providing for access of the impregnating compound to inner layers of electric insulating material, and on the end sections, flanges are attached, which boarder the area where electric insulating material is put. After winding electric insulating material, the lead terminal is thermally processed and put into an elastic sealed sheath, on which nipple passages to its inner cavity are put, uniformly distributed along the sheath. The lead terminal is then put into an impregnating chamber, thereby joining channels in the electrically conducting element and the nipple passages with the vacuum-pressure impregnating system. Further impregnation and insulation are done at high pressure of neutral liquid in the impregnating chamber and the compound inside channels in the electrically conducting element. The neutral liquid is heated and the lead terminal is baked.
 Windings of electric engine / 2293428
Electric machine of alternating current being one-phased or multi-phased electric motor with at least three phases, or synchronous generator with at least two poles contains main primary windings and secondary additional windings for removing saturation. Each additional winding is powered through one or several capacitors. Each additional winding is powered through one or several capacitors with opposite phase angle and opposite directions of field from aforementioned each appropriate main winding. Joint cross-section of wire used in each aforementioned main winding and in each aforementioned additional winding has given values.
 Commutatorless alternating-current machine / 2265271
Proposed commutatorless ac machine that has rotor and stator carrying m-phase running winding is also provided with additional winding incorporating same quantity of coil groups as running winding; when machine is running as motor, capacitive member is connected in parallel with additional winding leads; when it is running as generator, inductive member is connected in parallel with additional winding leads.
 Asynchronous compensated electric machine / 2112307
The invention relates to electrical engineering, namely the production, distribution and energy conversion, in particular to the conversion of electric energy into mechanical energy through induction motors with offset coil to improve the power factor of the last
 Double frequency electrical machine / 2477558
Invention is aimed to enable electric energy transmission from a stationary source to a rotary receiver such as from a solar cell battery rotating round the space vehicle to such space vehicle as well as a rotary receiver drive. According to the invention, the double frequency electrical machine has two three-phase windings combined within a common stator core, the numbers of the windings pole pairs equal to p1 and p2; induced in the poles are EMPs with frequencies equal to f1 and f2 accordingly (f1<f2); there are terminals for connection of external electrical circuits; placed on the rotor is at least one phase winding having terminals for connection of external electrical circuits. Additionally, the double frequency electrical machine may have a rotor with magnetised poles or unmagnetised projections, their number equal to 2·p1.
 Multi-phase bar wave winding of stator of asynchronous motor / 2437197
Bar wave winding of stator of asynchronous motor is single-layer, and winding bars are solid; at that, height of bar hb, which is determined using the equations for damping factor kd and relative current displacement factor ξ, which are calculated at maximum frequency value f of supply voltage on condition that damping factor kd is at least by two times more than the value of the required control range of rotation frequency of asynchronous motor.
 Low-speed asynchronous electric motor / 2412518
Low-speed asynchronous electric motor includes stator with multi-phase winding and rotor with interleaved core and short-circuited winding. Stator phases are made in the form of annular windings coaxial with rotor, each of which is located between two annular magnetic cores with teeth protruding in axial direction and which are opposite directed. At that, annular magnetic cores of the phase are offset relative to each other through π/z angle, and between them there arranged is toroidal magnetic core, and annular magnetic core of various phases are offset relative to each other through 2π/z·m angle, where z - the number of teeth of each annular magnetic core, and m - the number of phases.
 Two-phase induction welding generator / 2404032
Proposed invention can be used in hand-held electric arc welding devices. Induction welding generator has two-winding stator. Three-phase excitation winding 2 has terminals for excitation capacitors 3 to be connected thereto. Working winding 4 is a two-phase winding. Circuit of said winding each phase 4, 5, shifted through 90 degrees, incorporates compound capacitor 6, 7 and single-phase bridge rectifier 8, 9 shunted by shunting capacitors 10, 11. Output terminals of rectifiers 8, 9 are connected in parallel and welding electrode 12 is connected thereto.
 Short-circuited rotor with squirrel cage of asynchronous machine / 2386201
Proposed short-circuited rotor with squirrel cage comprises shaft (1) and laminated core of sheet steel (2), in laminated core of sheet steel (2) there are rotor winding (3) rods located, which at both ends of laminated core of sheet steel (2) are pulled through openings (10) of each end plate (9) and closed by short-circuited ring (4), which, being electrically conducting, connects ends of rotor winding (3) rods on one side of short-circuited rotor to squirrel cage, besides each end plate (9) comprises circumferential ledge, which at least partially covers short-circuiting ring (4) with geometric closure at its outer side, besides each end plate (9) comprises part of rotor winding (3) rod and part of short-circuiting ring (4). At the same time, according to the present invention, end plates (9) are arranged as massive and are made of stronger material compared to rods of rotor winding (3) and short-circuiting rings (4), besides rods of rotor winding (3) have bulge at their ends with increased cross section of rod (7), moreover, at least part of rotor winding (3) rods bulge lies in openings (10) of end plates (9), besides transition between bulge and short-circuiting ring (4) is arranged in the form of rounding with transitional radius (8).
 Double-winding stator with m=3-phase 2p1=6·k- and 2p2=8·k-pole lap windings in z=144·k slots / 2355097
Present invention pertains to electric machine engineering. The invention seeks to simplify manufacturing and increase use of active materials, while reducing input of insulating materials and coefficient of differential scattering σd% m=3-phase 2p1=6·k- and 2p2=8·k- pole lap windings of a stator in z=144·k slots. The essence of the invention lies in that, the double-winding stator of an asynchronous motor has m=3-phase 2p1=6·k- and 2p2=8·k-pole lap windings in z=144·k slots, each of which is made symmetrical from m=6-zone from equally spaced coils, put into the slots in two layers. According to this invention: from K=z coils with numbers from 1K to (z)K, the 2p1 pole winding relates to K/2 coils with odd numbers 1K, 3K,…(z-1)K, containing wK1 turns and connected into 6p1 coil semi-groups with q'1=4 neighbouring coils in each. The 2p2 pole winding relates to K/2 coils with even numbers 2K, 4K,…,(z)K, containing wk2 turns and connected into 6p2 coil semi-groups with q'2=3 neighbouring coils in each. All coils have uneven spacing in the slots, equal to yk=19, or yk=21, where k=1, 2 given q'1=z/12p1 and q'2=z/12p2.
 Double-winding stator with m=3-phase 2p1=12·k- and 2p2=14·k-pole lap windings in z=126·k slots / 2355096
Present invention relates to electric machine engineering. The invention seeks to simplify manufacturing and increase use of active materials, while reducing input of insulating materials and coefficient of differential scattering σd% m=3 phase p1=12·k and 2p2=14·k - pole lap windings in z=126·k slots. The essence of the invention lies in that, for the double winding stator of an asynchronous motor with m=3 phase 2p1=12·k- and 2p2=14·k- pole lap windings in z=126·k slots, each of which is made symmetrical with an m=6-zone from equally spaced coils, put into slots in two layers: from K=z coils with numbers from 1K to (z)K, the 2p1 pole winding relates to K/2 coils with even numbers 1K, 3K,…, (z-1)K, containing wk1 turns and connected into 6p1 coil semi-groups, given q'1=7/4 and with grouping of their coils into a 2 2 2 1 row, which repeats nine times. The 2p2 pole winding relates to K/2 coils with even numbers 2K, 4K,…, (z)K, containing wk2 turns and connected, given q'2=3/2, into 6p2 alternating double- and single-coil semi-groups. The spacing of all coils in the slots equals yk=9, where k=1, 2 when q'1=z/12p1 and q'2=z/12p2.
 Double-winding stator with c m=3-phase 2p1=8·k- and 2p2=10·k-pole lap windings in z=144·k slots / 2355095
Present invention pertains to electric machine engineering. The invention seeks to simplify manufacturing and increase use of active materials, while reducing input of insulating materials and coefficient of differential scattering σd% m=3-phase 2p1=8·k and 2p2=10·k - pole lap windings in z=144·k slots. The essence of the invention lies in that, for the double winding stator of an asynchronous motor with m=3 phase 2p1=8·k and 2p2=10·k-pole lap windings in z=144·k slots, each of which is made symmetrical with an m=6-zone from equally spaced coils, put into slots in two layers: from K=z coils with numbers from 1K to (z)K, the 2p1 pole winding relates to K/2 coils with odd numbers 1K, 3K,…, (z-1)K, containing wk1 turns and connected into 6p1 coil semi-groups with q'1=3 neighbouring coils in each. The 2p2 pole winding relates to K/2 coils with even numbers 2K, 4K,…,(z)K, containing wk2 turns and connected into 6p2 coil semi-groups given q'2=12/5, with grouping their coils in a 3 2 3 2 2 row, which repeats six times. The spacing of all coils in the slots equals yk=15, where k=1, 2 when q'1=z/12p1 and q'2=z/12p2.
 Double-winding stator with m=3-phase 2p1=6·k- and 2p2=8·k-pole lap windings in z=72·k slots / 2355094
Present invention relates to electric machine engineering. The invention seeks to simplify manufacture and increase use of active materials while reducing input of insulating materials and lowering coefficient of differential scattering σd% m=3-phase 2p1=6·k- and 2p2=8·k-pole lap windings of a stator with z=72·k slots. The essence of the invention lies in that, the double-winding stator of an asynchronous motor has m=3-phase 2p1=6·k- and 2p2=8·k-pole lap windings in z=72·k slots, each of which is made from m=6-zone from equally spaced coils, put into the slots in two layers. According to this invention: from K=z coils with numbers from 1K to (z)K, the 2p1 pole winding relates to K/2 coils with odd numbers 1K, 3K,…(z-1)K, containing wk1 turns and connected into 6p1 coil semi-groups with q'1=2 neighbouring coils in each. The 2p2 pole winding relates to K/2 coils with even numbers 2K, 4K,…,(z)K, containing wk2 turns and connected, given q'2=3/2, to 6p2 into alternating double- and single-coil semi-groups. All coils have spacing in the slots, equal to yk=9, where k=1, 2, 3; q'1=z/12p1 and q'2=z/12p2.
 Double winding stator with m=3-phase 2p1=8·k- and 2р2=10·k-polar lap windings in z=96·k slots / 2355093
Present invention pertains to electric machine engineering. The invention seeks to simplify manufacturing and increase use of active material while reducing use of insulating materials and values of coefficient of differential scattering σd% m=3-phase 2p1=8·k and 2p2=10·k-polar lap windings of a stator with z=96-k slots. The essence of the invention lies in that, the double-winding stator of an asynchronous motor has m=3-phase 2p1=8·k- and 2p2=10·k- pole lap windings in z=96·k slots, each of which is made symmetrically from m'=6-zone from equally spaced coils, put into the slots in two layers. According to this invention: from K=z coils with numbers from 1K to (z)K, the 2p1 pole winding relates to K/2 coils with odd numbers 1K, 3K,…(z-1)K, containing wk1 turns and connected into 6p1 coil semi-groups with q'1=2 neighbouring coils in each. The 2p2 pole winding relates to K/2 coils with even numbers 2K, 4K,…,(z)K, containing wk2 turns and connected, given q'2=8/5, with grouping their coils in a 22121row, which repeats six times. The spacing of all coils in the slots equals yk=9, where k=1, 2 when q'1=z/12p1 and q'2=z/12p2.
 Motor-brake / 2287889
Stator and rotor contacting surfaces of motor-brake built around squirrel-cage induction motor are provided with taper thread; rotor shaft is supported on one end by radial bearing and on other one, by thrust bearing with spacer disk affording cohesion between stator and rotor threaded surfaces during reverse movement of rotor; shaft extension of the latter is splined.
 Asynchronous two-frequency generator / 2313886
Asynchronous two-frequency electric machine contains short-circuited rotor and two three-phased windings combined in common core of stator with numbers of pole pairs p1 and p2, where EMF are induced at frequency f1 and f2 respectively, having clamps for connecting external electric circuits, including electric receivers, while in parallel to winding with number of pole pairs p2 a three-phased excitation capacitor is connected, also contains a motor as supply of mechanical power which rotates shaft of machine, and additional three-phased excitation capacitor, connected in parallel to winding with a number of pole pairs p1.
 Electromechanical core drilling assembly / 2337225
Assembly contains power supply source with control system, submersible asynchronous three-phase electric motor, rotor of which is connected to core tube with crown, stator connected with top tube, and elastic element that is rigidly fixed with cable lock on one side and electric motor rotor on the other. Source of windings power supply is equipped with single-phase bridge rectifier, rotor of submersible asynchronous three-phase electric motor is made with one pair of explicit poles, and one phase stator winding is serially connected with bridge single-phase rectifier, to the outlet of which by direct current two other phase windings are connected by serially connected between each other ends, which form one pair of poles, with the possibility of rotor fixation with stator by elastic element in initial position, at which longitudinal axis of rotor symmetry coincides with longitudinal axis of symmetry of electromagnet field formed by two serially connected stator windings.
Double winding stator with m=3-phase 2p1=8·k- and 2р2=10·k-polar lap windings in z=96·k slots / 2355093
Present invention pertains to electric machine engineering. The invention seeks to simplify manufacturing and increase use of active material while reducing use of insulating materials and values of coefficient of differential scattering σd% m=3-phase 2p1=8·k and 2p2=10·k-polar lap windings of a stator with z=96-k slots. The essence of the invention lies in that, the double-winding stator of an asynchronous motor has m=3-phase 2p1=8·k- and 2p2=10·k- pole lap windings in z=96·k slots, each of which is made symmetrically from m'=6-zone from equally spaced coils, put into the slots in two layers. According to this invention: from K=z coils with numbers from 1K to (z)K, the 2p1 pole winding relates to K/2 coils with odd numbers 1K, 3K,…(z-1)K, containing wk1 turns and connected into 6p1 coil semi-groups with q'1=2 neighbouring coils in each. The 2p2 pole winding relates to K/2 coils with even numbers 2K, 4K,…,(z)K, containing wk2 turns and connected, given q'2=8/5, with grouping their coils in a 22121row, which repeats six times. The spacing of all coils in the slots equals yk=9, where k=1, 2 when q'1=z/12p1 and q'2=z/12p2.
Double-winding stator with m=3-phase 2p1=6·k- and 2p2=8·k-pole lap windings in z=72·k slots / 2355094
Present invention relates to electric machine engineering. The invention seeks to simplify manufacture and increase use of active materials while reducing input of insulating materials and lowering coefficient of differential scattering σd% m=3-phase 2p1=6·k- and 2p2=8·k-pole lap windings of a stator with z=72·k slots. The essence of the invention lies in that, the double-winding stator of an asynchronous motor has m=3-phase 2p1=6·k- and 2p2=8·k-pole lap windings in z=72·k slots, each of which is made from m=6-zone from equally spaced coils, put into the slots in two layers. According to this invention: from K=z coils with numbers from 1K to (z)K, the 2p1 pole winding relates to K/2 coils with odd numbers 1K, 3K,…(z-1)K, containing wk1 turns and connected into 6p1 coil semi-groups with q'1=2 neighbouring coils in each. The 2p2 pole winding relates to K/2 coils with even numbers 2K, 4K,…,(z)K, containing wk2 turns and connected, given q'2=3/2, to 6p2 into alternating double- and single-coil semi-groups. All coils have spacing in the slots, equal to yk=9, where k=1, 2, 3; q'1=z/12p1 and q'2=z/12p2.
Double-winding stator with c m=3-phase 2p1=8·k- and 2p2=10·k-pole lap windings in z=144·k slots / 2355095
Present invention pertains to electric machine engineering. The invention seeks to simplify manufacturing and increase use of active materials, while reducing input of insulating materials and coefficient of differential scattering σd% m=3-phase 2p1=8·k and 2p2=10·k - pole lap windings in z=144·k slots. The essence of the invention lies in that, for the double winding stator of an asynchronous motor with m=3 phase 2p1=8·k and 2p2=10·k-pole lap windings in z=144·k slots, each of which is made symmetrical with an m=6-zone from equally spaced coils, put into slots in two layers: from K=z coils with numbers from 1K to (z)K, the 2p1 pole winding relates to K/2 coils with odd numbers 1K, 3K,…, (z-1)K, containing wk1 turns and connected into 6p1 coil semi-groups with q'1=3 neighbouring coils in each. The 2p2 pole winding relates to K/2 coils with even numbers 2K, 4K,…,(z)K, containing wk2 turns and connected into 6p2 coil semi-groups given q'2=12/5, with grouping their coils in a 3 2 3 2 2 row, which repeats six times. The spacing of all coils in the slots equals yk=15, where k=1, 2 when q'1=z/12p1 and q'2=z/12p2.
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FIELD: electricity. SUBSTANCE: in three-phase asynchronous electric motor consisting of a stator including a housing, a hollow steel charged core attached from the inside to the housing and carrying the slots on inner cylindrical surface, and three-phase power winding laid in slots of charged core and made in the form of three single-phase windings with similar parameters and spatial shift of axes through 120 degrees, a rotor arranged inside the stator core with an air gap in relation to it, and end shields attached to the stator housing, in which the rotor shaft is installed, according to the invention, the stator includes an additional compensating three-phase winding laid into slots of the core and consisting of three single-phase windings with similar parameters, the axes of which are offset in space through 120 degrees; at that, additional compensating three-phase winding is isolated from three-phase power winding; its single-phase windings are connected to a star diagram, and phase beginnings are connected to capacitors connected to a triangle diagram, which are installed on the motor or beyond the motor. EFFECT: increasing power coefficient of three-phase asynchronous electric motor. 3 dwg
The invention relates to the field of electrical engineering, namely the three-phase asynchronous motors, converts the electrical energy of alternating current into mechanical energy. Known three-phase synchronous electric motors. The main structural parts of such engines are the stator and rotor. The stator is a hollow steel laminated core is fixed in the casing and bearing on the inner cylindrical surface of the grooves, which are placed in the windings of the three phases with the same parameters. The axis of the winding phases are shifted in space by 120°. Winding phases are connected in a star schema or the schema of the triangle and connected to the mains supply three-phase AC voltage. The motor rotor is mounted inside the stator core with an air gap in relation to him. It contains a steel core, the excitation winding and two contact rings mounted on the shaft and electrically connected to the terminals of the excitation winding. The contact rings are conjugate placed in the brush holders of the copper-graphite brush, through which the excitation winding is connected to the constant current source (Briskin DE Electric cars and micro machines. Study guide for instrument specialties. M., High school, 1971, s.257-263). The disadvantages of the known with narodnih engines are difficult to start from standstill and large magnitude currents, they consume from the mains supply three-phase AC voltage in this mode. Inrush currents are the cause of significant planting voltage, which adversely affects the operation of the electric power consumers. In addition, the rated power synchronous motors are characterized by the quantities in the hundreds and thousands of kilowatts, which limits their practical application drives great power. The disadvantages include the presence of sliding contact between the contact rings and brushes, as well as the need to use a constant current source. Also known three-phase asynchronous electric motors with a different design of the rotor (Kopylov I.P. Electric machine. Textbook for high schools. M, Energoatomizdat, 1986, s-162). The closest device to the same destination to the claimed invention on the totality of symptoms is three-phase asynchronous motor with squirrel-cage rotor winding, consisting of a stator, rotor, and two shields. The stator includes a housing inside of which is attached a hollow core, recruited from separate sheets of steel, with grooves on the inner surface. The slots are three-phase network winding, consisting of three, with the same parameters, Ognian the x windings, axes are displaced in space by 120°. Single-phase winding are connected in a star schema or the schema of the triangle. The beginning of the three-phase winding displayed in the terminal box, where they are connected to the mains supply three-phase AC voltage. A rotor mounted inside the stator with an air gap in relation to him. Structurally, the rotor is a hollow steel laminated cylinder, the shaft having on the outer surface of the grooves in which are placed a short-circuited winding. The rotor shaft is supported by bearings bearing shields. Shields fixed to the stator housing and are designed to maintain a constant air gap between stator and rotor (Pantyushin B.C. Electrical engineering. Textbook for high schools. Edition 2nd revised and enlarged. M., High school, 1976, s-415). This unit is adopted for the prototype. The characteristics of the prototype, which is common with the claimed invention: a stator including a housing, a hollow steel laminated core fixed inside the casing and bearing on the inner cylindrical surface of the grooves, the three-phase network the winding placed in the slots of the laminated core and is made in the form of three-phase windings with the same parameters and the spatial shift of the axes 120°; a rotor located NR the three stator core with an air gap in relation to it; shields fixed to the stator housing has a rotor shaft. The disadvantages of the known three-phase asynchronous motors should be attributed to a low power factor. Especially this disadvantage inherent in asynchronous motors low-power, low-speed asynchronous motors for low and medium power, and all asynchronous motors operating with a low load factor and idling. The reason for the marked disadvantage is the consumption of mains reactive power and reactive magnetizing current required to create the engine of an alternating magnetic field. Reactive magnetizing current passing through the elements of the system of production, transmission, distribution and conversion of electrical energy up to the induction motor, causes additional loading of live parts, limits their bandwidth, causing increasing loss of voltage and power, leads to a deterioration of the quality of electrical energy and performance. The objective of the invention is to increase the power factor three-phase asynchronous electric motor. The problem is solved due to the fact that in the known three-phase asynchronous elektricheskaya, consisting of a stator, comprising a casing, a hollow steel laminated core fixed inside the casing and bearing on the inner cylindrical surface of the grooves, and a three-phase network the winding placed in the slots of the laminated core and is made in the form of three-phase windings with the same parameters and the spatial shift of the axes at 120°, the rotor located inside the stator core with an air gap in relation to him, and shields fixed to the stator housing has a rotor shaft, a stator contains additional compensating three-phase winding placed in the slots of the core and consisting of three identical single-phase parameters winding axes are displaced in space by 120°, with additional compensating three-phase winding is isolated from the network three-phase winding, forming its phase windings connected in a star schema, and the early phases connected to connected in a Delta capacitors installed on the engine or outside it. Distinguishing features of the proposed device from the prototype - the presence of additional compensating three-phase winding placed in the slots of the stator core and consisting of three similar single-phase windings, the axis of which is displaced in space by 120°; additional is Naya compensating three-phase winding is isolated from the network three-phase winding; single-phase winding, forming additional compensating winding, connected in a star schema; the beginning phases additional compensating three-phase winding connected to connected in a Delta capacitors installed on the engine or outside it. Distinctive features in combination with the known can develop a three-phase induction motor, the magnetic field which is generated by a current loop formed by an additional compensating three-phase winding and connected to the capacitors. From the mains magnetizing reactive current is hardly consumed. This achieves the claimed technical result: high power factor three-phase asynchronous electric motor. Invented the three-phase asynchronous motor, in comparison with the known, allows you to unload from a reactive magnetizing current generators and power stations, transformers, step-up and step-down substations, transmission lines, power distribution network and other elements of electrical systems. This leads to increase the throughput of the elements of power supply systems, reduction of electric power losses and voltage, the improvement in the quality of electronic the historical energy and operating characteristics of consumers. The invention is illustrated by drawings, figure 1-4. 1 shows a schematic view of a three-phase induction motor. Figure 2 - electrical connection scheme winding network. Figure 3 is an electric wiring diagram of additional compensating three-phase winding with a capacitor. Figure 4 shows the experimental dependence of current I1winding network and power factor cosφ from the effective power P2where solid lines shows the dependencies obtained in the study of serial three-phase asynchronous motor type AAA, dashed lines are the same as those according to the prototype of the proposed engine, created on the basis of serial engine type AAA. Three-phase asynchronous electric motor (figure 1) contains a stator comprising a housing 1, the inside is attached to a laminated stack of steel core with 2 grooves 3 on the inner surface. In the slots 3 posted by network three-phase winding 4 and an additional compensating three-phase winding 5. Network three-phase winding 4 is symmetric, consists of three identical single-phase windings A-X; B-Y, C-Z (2), the axis of the phases are shifted in space by 120°. Phase winding network 4 is included in the star schema, which is achieved by connection to the common point of all f is g X, Y, Z. it is also Possible the connection phase winding network 4 to the schema of the triangle. The beginning phases a, b, C network winding 4 is connected to the mains supply three-phase AC voltage. Additional compensating three-phase winding 5 is isolated from the network three-phase winding 4 and contains three identical (with the same parameters) single-phase winding AndD-XD;D-YD;D-ZD(figure 3), the axis of which is displaced in space by 120°. Electrical parameters of the windings of phases winding network 4 and an additional compensating winding 5 are different from each other. Single-phase winding, forming additional compensating winding 5 are connected in a star schema and connected to a capacitor 6 connected in a Delta. The capacitors 6 are placed on the stator, for example in the terminal box begin and end phases of the network 4 and an additional compensating windings 5 (in figure 1, the terminal box is not shown). In some cases it may be appropriate to the placement of the capacitors 6 outside of the engine. This solution can be used in high-voltage induction motors. The rotor of an induction motor is located inside the stator and includes a steel core 7 and the short-circuited winding 8 made the type of a "squirrel cage". The core 7 of the rotor mounted on the shaft 9. The rotor part of the Yong from stator air gap 10, maintaining the value of which is carried out by using shields (figure 1 not shown)fixed to the stator housing 1. In bearing shields installed the shaft 9 of the rotor. The operation of the inventive three-phase asynchronous motor is as follows. When the network connection three-phase winding 4 to the power of three-phase AC voltage, there arises a current that creates in the air gap 10 of the rotating magnetic field. This field induct additional compensating three-phase winding 5 electromotive force, under the action of which in the electric circuit formed additional compensating three-phase winding 5 and the capacitor 6, there is a current, having primarily reactive magnetizing component. This component of the current excites in the air gap 10 rotating alternating magnetic field whose lines of force are the same in direction with the lines of force of a rotating magnetic field network three-phase winding 4. Consequently, when a constant value of the supply voltage is to reduce the reactive component of the current consumed network three-phase winding 4 of the electrical network, and hence the overall current winding network 4. The experimental dependence of current I1phase winding network 4 and the power factor coφ three-phase asynchronous motor from the effective power P 2shown in figure 4. A prototype of the proposed engine is created on the base of series three-phase asynchronous motor type AAU. For this factory network three-phase winding of the stator wire marks PETV 0,67/0,73 mm, was removed from the slots and instead, in the available slots were laid two three-phase windings: network and additional compensation. The number of turns in the phase winding network and its schema are saved; the only change is the wire, which was accepted wire type PETV-2 TU 16-705.110-79 with insulation type 1 diameter of 0.53/0,576 mm Additional compensation of three-phase winding have the same network three-phase winding, and ran wire marks PETV-2 TU 16-705.110-79 with insulation type 1 diameter of 0.9/0,959 mm Number of conductors compensation of three-phase winding in the groove was 13. Dependency analysis shows that in idle mode the serial engine consumes from the mains current of 2.3 a, And a prototype of the proposed motor - current value which is 0.8 A. With increasing load current in the windings network engines is increased by increasing the active current component. The power factor of the serial engine idling equal to 0.2, and the prototype was 0.9. As you increase the load on the shaft engines coefficient of mo is activity increases. However, the serial engine with the power of R2equal to 670 watts, power factor equal to or 0.57, and the prototype of the proposed engine of this indicator at the same load of 0.97. Invented the three-phase induction motor is characterized by a high value of power factor and smaller values of current consumption from the mains, allowing you to use it widely in industry, agriculture, transport, utilities, household, etc. Positive effect of the application of the invention is to reduce the current load of the generators of power stations, step-up and step-down transformers, wires, air lines, cables factory and workshop distribution networks, the network of the windings themselves induction motors and became particularly important in the conditions of production and further operation of tens of millions of three-phase asynchronous motors. Three-phase asynchronous electric motor consisting of a stator, comprising a casing, a hollow steel laminated core fixed inside the casing and bearing on the inner cylindrical surface of the grooves, and a three-phase network the winding placed in the slots of the laminated core and is made in the form of three-phase windings with Odinak the new parameters and the spatial shift of the axes 120°, the rotor located inside the stator core with an air gap in relation to him, and shields fixed to the stator housing has a rotor shaft, wherein the stator includes an additional compensating three-phase winding placed in the slots of the core and consisting of three similar single-phase windings, the axis of which is displaced in space by 120°, with additional compensating three-phase winding is isolated from the network three-phase winding, forming its phase windings connected in a star schema, and the early phases connected to connected in a Delta capacitors installed on the engine or outside.
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