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Short-circuited rotor with squirrel cage of asynchronous machine

Short-circuited rotor with squirrel cage of asynchronous machine
IPC classes for russian patent Short-circuited rotor with squirrel cage of asynchronous machine (RU 2386201):
Another patents in same IPC classes:
Method for manufacturing of multilayer winding of electric machine stator Method for manufacturing of multilayer winding of electric machine stator / 2369952
Invention is related to the field of electric engineering, namely to engines with improved excitation winding at stator. Method for manufacturing of electric machine stator multilayer winding consists in the fact that at first coils are moulded on template, then coils are assembled in windings, afterwards windings are laid in stator core, and then windings are serially connected. Coils used are template single-turn coils, which are then serially connected into wave windings, afterwards produced wave windings are laid one onto another and are connected serially into multilayer winding.
Double-winding startor with m=3-phase 2p<sub>1</sub>=4·k- and 2р<sub>2</sub>=6·k- pole lap windings in z=144·k slots Double-winding startor with m=3-phase 2p1=4·k- and 2р2=6·k- pole lap windings in z=144·k slots / 2362258
Invention relates to electrical engineering and electrical machine building and can be used in three-phase double-speed cage asynchronous motors. The double-winding stator of an asynchronous motor has m = 3 - phase, 2p1 = 4 k- and 2p2 = 6 k-pole lap windings in z =144 k slots, each of which is symmetrical with m' = 6 - zone of uniformly displaced windings, placed in slots in two layers. According to this invention, of the K = z windings with numbers from 1K to (z)K, the 2p1 - pole winding relates to K/2 windings with odd numbers 1K, 3K, …, (z-1)K, each containing wk1 turns and connected in 6p1 sub-groups of windings with q'1 = 6 neighbouring windings in each, and the 2p2 - pole winding relates to K/2 windings with even numbers 2K, 4K,…, (z)K, each containing wk1 turns and connected in 6p2 sub-groups of windings with q'2 = 4 neighbouring windings in each. All windings have slot pitch yk= 29, where k=1, 2; q'1 = z/12p1 and q'2 = z/12p2.
Double-winding startor with m=3-phase 2p<sub>1</sub>=12- and 2p<sub>2</sub>=14- pole lap windings in z=144 slots Double-winding startor with m=3-phase 2p1=12- and 2p2=14- pole lap windings in z=144 slots / 2362257
Invention relates to electrical engineering and electrical machine building and can be used in three-phase double-speed cage asynchronous motors. . Each of the 3-phase windings with 2p1=12- and 2p2=14-pole lap windings in z=144 slots of the double-winding stator of the asynchronous motor is symmetrical with m'=6-zone from uniformly displaced windings, placed in slots in two layers. According to this invention: of the K = z windings with numbers from 1K to (z)K, the 2p1 - pole winding relates to K/2 windings with odd numbers 1K, 3K, …, (z-1)K, each containing wk1 turns and connected in 6p1 sub-groups of windings with q'1 =2 neighbouring windings in each, and the 2p2 - pole winding relates to K/2 windings with even numbers 2K, 4K,…, (z)K, each containing wk2 turns and connected, when q'2=12/7, in 6p2 sub-groups with grouping of their windings in a series 2221221, repeated six times. All windings have slot pitch yk= 11, where q'1 = z/12p1 and q'2 = z/12p2.
Double-winding startor with m=3-phase 2p<sub>1</sub>=8·k- and 2p<sub>2</sub>=10·k-pole lap windings in z=90·k slots Double-winding startor with m=3-phase 2p1=8·k- and 2p2=10·k-pole lap windings in z=90·k slots / 2362256
Invention relates to electrical engineering and electrical machine building and can be used in three-phase double-speed cage asynchronous motors. Each of the 3-phase windings with 2p1=8·k- and 2p2=10·k-pole lap windings in z=90 K slots of the double-winding stator of the asynchronous motor is symmetrical with m'=6-zone from uniformly displaced windings, placed in slots in two layers. Of the K = z windings with numbers from 1K to (z)K, the 2p1 - pole winding relates to K/2 windings with odd numbers 1K, 3K, …, (z-1)K, each containing wk1 turns and connected in 6p1 sub-groups of windings with q'1 = 15/8 with grouping of their windings in a series 22222221, repeated three times. The 2p2 - pole winding relates to K/2 windings with even numbers 2K, 4K,…, (z)K, each containing wk2 turns and connected, in 6p2 alternating two- and one sub-groups of windings. All windings have slot pitch yk= 9, where k=1, 2 when q'1 = z/12p1.
Double-winding startor with m=3-phase 2p<sub>1</sub>=10·k- and 2р<sub>2</sub>=12·k-pole lap windings in z=108·k slots Double-winding startor with m=3-phase 2p1=10·k- and 2р2=12·k-pole lap windings in z=108·k slots / 2362255
Invention relates to electrical engineering and electrical machine building and can be used in three-phase double-speed cage asynchronous motors. Each of the 3-phase windings with 2p1=10·k- and 2p2=12·k-pole lap windings in z=108 K slots of the double-winding stator of the asynchronous motor is symmetrical with m'=6-zone from uniformly displaced windings, placed in slots in two layers. Of the K = z windings with numbers from 1K to (z)K, the 2p1 - pole winding relates to K/2 windings with odd numbers 1K, 3K, …, (z-1)K, each containing wk1 turns and connected in 6p1 sub-groups of windings with q'1 = 9/5 with grouping of their windings in a series 22221, repeated six times. The 2p2 - pole winding relates to K/2 windings with even numbers 2K, 4K,…, (z)K, each containing wk2 turns and connected, when q'2=3/2, in 6p2 alternating two- and one sub-groups of windings. All windings have slot pitch yk= 9, where k=1, 2 when q'1 = z/12p1 and q'2 = z/12p2.
Double-winding startor with m=3-phase 2p<sub>1</sub>=8·k- and 2р<sub>2</sub>=10·k-pole lap windings in z=120·k slots Double-winding startor with m=3-phase 2p1=8·k- and 2р2=10·k-pole lap windings in z=120·k slots / 2362254
Invention relates to electrical engineering and electrical machine building and can be used in three-phase double-speed cage asynchronous motors. Each of the 3-phase windings with 2p1=8·k- and 2p2=10·k-pole lap windings in z=120 K slots of the double-winding stator of the asynchronous motor is symmetrical with m'=6-zone from uniformly displaced windings, placed in slots in two layers. Of the K = z windings with numbers from 1K to (z)K, the 2p1 - pole winding relates to K/2 windings with odd numbers 1K, 3K, …, (z-1)K, each containing wk1 turns and connected, when q1=5/2, in 6p1 alternating three- and two sub-groups of windings, and the 2p2-pole winding relates to K/2 windings with even numbers 2K, 4K, …, (z)K, each containing wk turns and connected in 6p2 sub-groups of windings with q'2=2 neighbouring windings in each. All windings have slot pitch yk= 15, where k=1, 2 when q'1 = z/12p1 and q'2 = z/12p2.
Double-winding stator with m=3-phase 2p<sub>1</sub>=10- and 2р<sub>2</sub>=14-pole lap windings in z=168 slots Double-winding stator with m=3-phase 2p1=10- and 2р2=14-pole lap windings in z=168 slots / 2362253
Invention relates to electrical engineering and electrical machine building and can be used in three-phase double-speed cage asynchronous motors. Each of the 3-phase windings with m=3-phase 2p1=10- and 2p2-14-pole lap windings in z=168 slots of the double-winding stator of the asynchronous motor is symmetrical with m'=6-zone from uniformly displaced windings, placed in slots in two layers. According to this invention: of the K = z windings with numbers from 1K to (z)K, the 2p1 - pole winding relates to K/2 windings with odd numbers 1K, 3K, …, (z-1)K, each containing wk1 turns and connected in 6p1 sub-groups of windings with q'1 = 14/5 with grouping of their windings in a series 33332, repeated six times, and the 2p2 - pole winding relates to K/2 windings with even numbers 2K, 4K,…, (z)K, each containing wk2 turns and connected in 6p2 sub-groups of windings with q'2=2 neighbouring windings in each. All windings have slot pitch yk= 13, where q'1 = z/12p1 and q'2 = z/12p2.
Double-winding startor with m=3-phase 2p<sub>1</sub>=10- and 2р<sub>2</sub>=12-pole lap windings in z=180 slots Double-winding startor with m=3-phase 2p1=10- and 2р2=12-pole lap windings in z=180 slots / 2362251
Invention relates to electrical engineering and electrical machine building and can be used in three-phase double-speed cage asynchronous motors. The double-winding stator of an asynchronous motor has m = 3 - phase, 2p1 = 10- and 2p2 = 12-pole lap windings, placed in z =180 slots, each of which is symmetrical with m' = 6 - zone of uniformly displaced windings, placed in slots in two layers. According to this invention, of the K = z windings with numbers from 1K to (z)K, the 2p1 - pole winding relates to K/2 windings with odd numbers 1K, 3K, …, (z-1)K, each containing wk1 turns and connected in 6p1 sub-groups of windings with q'1 = 3 neighbouring windings in each, and the 2p2 - pole winding relates to K/2 windings with even numbers 2K, 4K,…, (z)K, each containing wk2 turns and connected, when q'2 = 5/2, in 6p2 alternating three- and two sub-groups of windings. All windings have slot pitch yk= 15, where q'1 = z/12p1 and q'2 = z/12p2.
Three-phase rod-shaped wave-winding for electrical machine with even number q=z/6p≥4 Three-phase rod-shaped wave-winding for electrical machine with even number q=z/6p≥4 / 2362250
Invention relates to electrical engineering and electric machine building and pertains to distinctive features of stators of three-phase asynchronous and synchronous electrical machines, as well as phase wound rotors of asynchronous motors. The proposed three-phase rod-shaped wave-winding for electrical machines with even number q=z/6p≥4 is made from uniformly distributed coils with number of turns wK=1 in each, connected in phases into one or two parallel branches. According to the first version of the invention, when q = 4, z = 24·p the coil contains 12 p turns with numbers 1K…(12·p)K with slot pitch yp = 11 with the beginning in the odd and the end in the even slot. Each of the turns 1K…12K is connected in series with (p - 1) others, displaced by 12 numbers, in 12 parts 1A, 2A, 3Z, 4Z, 5B, 6B, 7X, 8X, 9C, 10C, 11Y, 12Y, and in phase A parts A + 2A are connected in series into one and 7X + 8X into the other branch with their connection in series or in parallel using jumpers with antiparallel connection of branch 7X + 8X with respect to 1A + 2A. The other two phases B and C are connected likewise from parts 5B + 6B, 11Y + 12Y in phase B and 9C + 10C, 3Z + 4Z in phase C with phase onset from the beginning 1K, 5K, 9K. In the second version when q = 6, z = 36·p the coil contains 18·p turns with numbers 1K…(18·p)K with slot pitch yp= 15 with the beginning in the odd and the end in the even slot. Each of the turns 1K…18K is connected in series with (p - 1) others, displaced by 18 numbers, in 18 parts 1A, 2A, 3A, 4Z, 5Z, 6Z, 7B, 8B, 9B, 10X, 11X, 12X, 13C, 14C, 15C, 16Y, 17Y, 18Y, and in phase A parts 1A+2A+3A are connected into one and 10X+11X+12X into the other branch with their connection in series or in parallel using jumpers with antiparallel connection of branch 10X + 11X + 12X with respect to 1A + 2A + 3A. The other two phases B and C are connected likewise from parts 7B + 8B + 9B, 16Y + 17Y + 18Y in phase B and 13C+14C+15C and 4Z+5Z+6Z in phase C with phase onset from the beginning 1K, 7K, 13K. In the third version when q = 8, z = 48·p the coil contains 24·p turns with numbers 1K…(24·p)K with slot pitch yp= 19 with the beginning in the odd and the end in the even slot. Each of the turns 1K…24K is connected in series with (p - 1) others, displaced by 24 numbers, in 24 parts 1A, 2A, 3A, 4A, 5Z, 6Z, 7Z, 8Z, 9B, 10B, 11B, 12B, 13X, 14X, 15X, 16X, 17C, 18C, 19C, 20C, 21Y 22Y, 23Y, 24Y, and in phase A parts 1A + 2A + 3A + 4A are connected into one and 13X + 14X + 15X + 16X into the other branch with their connection in series or in parallel using jumpers with antiparallel connection of branch 13X + 14X + 15X + 16X with respect to 1A + 2A + 3A + 4A. The other two phases B and C are connected likewise from parts 9B + 10B + 11B + 12B and 21Y + 22Y + 23Y +24Y in B, 17C + 18C + 19C + 20C in B and 17C + 18C + 19C + 20C and 5Z + 6Z + 7Z + 8Z in C with phase onset from the beginning 1K, 9KD, 7K. In all versions the phases of the coils are conjugated into a star (Y) or triangle (Δ) with values p= 1, 2, 3, ….
Electric motor Electric motor / 2356157
Invention is attributed to electric engineering, in particular to direct current commutator motors and can be used in direct current electric drives. Essence of the invention consists in the fact that electric motor contains multipole inductor and armature in the form of multilayer printed board with polyphase winding. On armature printed board, additional layer is created. This layer contains current conductors of compensating winding, which conductors connect beginnings and ends of loops of polyphase winding working layers. On each working layer of printed board winding loops are formed, beginnings and ends of which are connected with corresponding beginnings and ends of other winding loops formed on subsequent working layers of multilayer printed board. Connections are made by means of plated-through holes, current conductors of compensating winding and current conductors connecting beginnings and ends of polyphase winding working layers.
Asynchronous machine / 2349015
Invention relates to electrical engineering and may be used in other engineering branches, for example wind-power engineering. The main point of the invention is the use of specific common rotor in asynchronous machine with two stators and common rotor. The above-mentioned common rotor rotates freely with regard to the shaft and at the same time has two separate short-circuited windings for each stator and one common short-circuited winding for both stators. One stator is fixed to the shaft, while the other rotates together with it. The windings of the fixed stator and the stator rotating together with shaft are made up from windings of two or more unequal sections of the above stators. In addition, the minor sector of the fixed stator winding and the minor winding sector of the stator rotating together with the shaft are connected to the mains. The same connection is ensured for large sectors or next by the size sections of the fixed stator or stator rotating together with stator shaft.
Rotor of frontal electric machine Rotor of frontal electric machine / 2321139
The rotor includes magnetic conductor with a yoke, a short-circuited winding, ventilation blades, short-circuiting ring, rods, ribs and stator. In accordance to the invention, ventilation blades are made current-conductive in form of several current-conductive, vertically mounted rods, connected to one short-circuiting ring of magnetic conductor, while upper part of current conductive ventilation blades is wedge-shaped, narrowing towards the working air gap and having cross-section area which is equal to or greater than the area of cross-section of current-conductive rod of magnetic conductor. Ventilating current-conductive blades may be installed according to two variants: in the first variant - vertically along internal and external diameters of short-circuiting ring of magnetic conductor, and in the second variant - vertically only along the internal diameter of short-circuiting ring of magnetic conductor, or only along external diameter of short-circuiting ring of magnetic conductor with possible passage of electric current through vertically mounted current-conductive rods of aforementioned blades along their whole height. The short-circuiting ring is installed on the side which is opposite to working air gap and positioned along the internal diameter of magnetic conductor, and ribs of ventilating current-conductive blades are installed on one short-circuiting ring.
Face electric machine Face electric machine / 2321136
The face electric machine includes circular magnetic conductors, stator with excitation winding, rotor shaft with short-circuited winding, bearing shield with roller bearings, springs and adjusting device. In accordance to the invention, one of springs is the main spring and is made with diameter which exceeds rotor shaft diameter, and is mounted on the rotor shaft between roller bearings to ensure possible free movement of shaft inside the main spring, while on one end the spring abuts against the body of one roller bearing, and by other end it abuts against the body of another roller bearing with possible movement of rotor shaft along its axis, and additional spring is installed between roller bearing and the rotor, while by one end it abuts against the body of a roller bearing, and by other end it abuts against the body of rotor.
Asynchronous two-frequency generator 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.
Asynchronous electric motor rotor Asynchronous electric motor rotor / 2309516
Shorted rotor of asynchronous electric motor contains a core with grooves, shorted winding with working and launching cells, where launching cell is made in form of inserted conductors of material with lesser specific electric conductance compared to working cell and shorting rings. In accordance to the invention, launching cell is made only of aforementioned inserted conductors and its length does not exceed the length of rotor magnetic wire, and working cell in each groove of magnetic wire of rotor only has one-sided contact with launching cell along whole length of inserted conductor, where working cell and shorting rings are cast copper, and inserted conductors of launching cell along their length are made in form of parts made of materials with varying specific electric conductance.
Axial-centrifugal motor-pump Axial-centrifugal motor-pump / 2284426
Invention can be used in liquid-handling pumping facilities. According to invention, in proposed axial-centrifugal motor-pump, stator of electric motor is hermetically isolated from passage part of motor-pump by diaphragm made of dielectric material. Magnetic circuit of rotor is laminated, made of electric sheet steel with short-circuited aluminum winding and is press-fitted into bladed impeller made of light aluminum alloy. Impeller-rotor is installed on axle secured in housing for free rotation.
Electrical machine winding Electrical machine winding / 2275729
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Induction motor rotor Induction motor rotor / 2251781
Proposed squirrel-cage rotor has laminated ferromagnetic core accommodating squirrel-cage winding bars. Upper part of bar has single- or double-ended longitudinal rectangular-section lateral slots which are not filled with ferromagnetic material. Double-ended longitudinal slots provided in upper part of bar are alternately disposed on one and other sides of bar.
Face-type induction machine Face-type induction machine / 2249293
Proposed machine has stator ring-type magnetic cores carrying field winding, as well as squirrel-cage rotor, stator base endshield accommodating supporting sleeve, rotor disk, bearing assembly incorporating rotor shaft bearings, and thrust bearing. Stator base endshield is fixed in position by means of enclosing hollow cylinder with thrust bearing disposed on its inner surface and tightly fitted on one end to annular boss of hollow cylinder and on other end abuts against rotor disk. Up to three actuating mechanisms can be coupled with this machine.
A method of manufacturing an electric machine having a core and a squirrel-cage winding A method of manufacturing an electric machine having a core and a squirrel-cage winding / 2239932
The invention relates to the field of electrical engineering, namely technology rotor induction motors with a core and a short-circuited winding, reduces waste conductive material squirrel-cage winding and to provide for the Assembly of large machines with a core having sufficient mechanical strength
Double-winding stator with m=3-phase 2p<sub>1</sub>=6·k- and 2p<sub>2</sub>=8·k-pole lap windings in z=144·k slots 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.

FIELD: electric engineering.

SUBSTANCE: 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).

EFFECT: improved reliability of short-circuited rotor and asynchronous machine as a whole by elimination of possibility of breakage in transitional area of rotor winding rods and short-circuiting rings, provision of reliable retention of short-circuiting rings at high speeds of rotation and centrifugal forces.

9 cl, 13 dwg

 

The invention relates to an asynchronous machine with a stator and a squirrel cage induction motors with squirrel cage, with squirrel-cage rotor with a squirrel cage includes a shaft and a laminated core made of sheet steel and laminated core of sheet steel are the rotor bars, which are on both ends of the laminated core of the steel sheet are fed through holes, respectively, one end plate and the short-circuited ring, which connects electrically impact the ends of the rotor bars one side of the squirrel-cage rotor with a squirrel cage.

Electric machines are used in many technical fields. In electric machines it is necessary to distinguish machines DC machines and AC machines three-phase current. Machine three-phase current can be divided into three phase synchronous machines and induction machines.

All these electric cars contain among other things a stationary stator and mounted for rotation rotor. The rotor depending on the structural design provided with a winding system. This wrapping system may consist of one or more wire windings or core windings. Wire windings or core windings can be designed also coredesign the tide winding type squirrel cage. In the case of rods and short-circuited windings in induction motors get a squirrel-cage rotor with a squirrel cage. In this case, the laminated core made of sheet steel rotor includes a rotor bars, which at their ends electrically impact connected with each other through short rings.

It is known that the transition region of the rotor bars to the short rings during heating of the rotor during operation is exposed to shear stress of shear, so it may lead to destruction of the joint. It primarily depends on various extensions of the laminated core of sheet steel rotor and short rings when heated, and from centrifugal forces during operation. In the publication JP 2000-014105 And it is therefore proposed to perform the ends of the rotor bars and short rings thickened, so that the rotor bars and short rings have increased the total cross-sectional area. Furthermore, from the description to EP 1453180 A2 is also known to skip the rotor bars on each side through the face plate, before joining shorting sleeve.

The disadvantage however is that although the danger of breaking the connection between the rotor core and briefly licausi ring is reduced, the gap, however, can still occur.

The basis of the invention lies therefore the task of creating an asynchronous machine with squirrel-cage rotor with a squirrel cage, which ensures the connection between the rotor core and the short ring.

This problem is solved according to the invention due to the fact that each end plate includes a circumferential flange which is at least partially overlaps with geometric circuit shorting sleeve on its outer side.

Thus preferably is achieved that each shorting sleeve at its outer side is covered by the face plate, thereby shorting sleeve when heated during operation cannot be greatly expanded and the cutting load and the gap of the transition area of the rotor bars to the short rings are excluded. In addition, shorting sleeve is held securely in its place also at high rotational speeds and high centrifugal forces.

Further preferred form of execution is obtained if the rotor bars have their ends thickening with increased cross-section of the rod, with thickening of the rotor bars lies in the face plate. Thus the transition region of the rods Roto is Noah winding to short rings made more stable and the risk of rupture is further diminished.

Further, the transition between the thickening and the short ring is made preferably in the form of a rounded transition radius. This eliminates exposed to destruction in the corner areas, in which there are particularly high cutting load.

In order better to have thickening of circular cross-section, they can be positioned slightly offset to the rotor bars. Thus, for example, preferably is achieved in that the thickening does not extend past the edge of the squirrel-cage rotor with a squirrel cage.

The number of holes in the face plate may be equal to or less than the number of rotor bars. In the first case is achieved particularly accurate and reliable passage of the rotor bars, the rotor bars are protected from destruction of the mechanical plate. In the second case through one hole in the face plate send a few of the rotor bars, which is particularly preferred, if the face plate shall be manufactured simply and cheaply.

Further preferred form of execution is obtained if each face plate provides additional circumferential flange which overlaps with geometric circuit, at least partially shorting sleeve on its inner side. The fact itself is m by using the face plate rests not only on the external side of the short ring, but also inside. This passage serves among other things to protect short ring from mechanical damage.

In addition, the transitions in the profile of the rotor bars and/or short rings in framed face plate area can be made in the form of curves with transition radius. This eliminates the danger of destruction of the angular space and increases thereby the durability and reliability of the squirrel-cage rotor with a squirrel cage.

The face plate is the preferred way is so that it is in the area of binding to the shaft has a relatively small thickness of material, or has such a large axial hole that the shaft is not affected. Due to both alternative measures saves material and reduces the inertial moment of the squirrel-cage rotor with a squirrel cage.

A preferred manner, the rotor bars and short rings are made of an electrically well conductive material, such as copper or aluminum in the form of a single part or, respectively, cast in a single piece.

Further, it is possible to provide on the short side of the ring facing away from the rotor bars, leading radially outward and/or tangentially passing grooves, so that preferred the OHL is the establishment of a short ring occurs especially during operation of the asynchronous machine.

The invention and further preferred form of execution of the invention according to the features of dependent claims are explained in further detail based on examples, schematically represented in the drawings, without limiting the invention to this example implementation, when this show:

FIGURE 1 - part of the squirrel-cage rotor with a squirrel cage according to the prior art;

FIGURE 2 is a part corresponding to the invention of the squirrel-cage rotor with a squirrel cage;

FIGURE 3 - part of another corresponding to the invention of the squirrel-cage rotor with a squirrel cage;

4 is a part corresponding to the invention of the squirrel-cage rotor with a squirrel cage figure 3;

5 is a part of another corresponding to the invention of the squirrel-cage rotor with a squirrel cage;

6 is a part corresponding to the next invention squirrel-cage rotor with a squirrel cage figure 5;

FIG.7 is a part corresponding to the invention of the squirrel-cage rotor with a squirrel cage;

FIG - part corresponding to the invention of the squirrel-cage rotor with a squirrel cage 7;

FIG.9 - the next part corresponding to the invention of the squirrel-cage rotor with a squirrel cage;

FIGURE 10 is a part corresponding to the invention of the squirrel-cage rotor with a squirrel to etkey figure 9;

11 - the next part corresponding to the invention of the squirrel-cage rotor with a squirrel cage;

FIG - part corresponding to the invention of the squirrel-cage rotor with a squirrel cage figure 11;

FIG is an asynchronous machine.

Figure 1 presents part of the squirrel-cage rotor with a squirrel cage according to the prior art. In the case of rotating electrical machines, which work on the induction principle, squirrel-cage winding in the rotor are made of an electrically well conductive material, preferably copper or aluminum. This squirrel-cage winding, first, consists of a certain number of rotor bars 3 with a specific cross-section that terminates in a laminated core made of sheet steel rotor 2. Secondly, on the face sides of the laminated core steel sheet is accordingly one short ring 4, which connects all the terminals of the rotor winding 3 of the respective sides of the rotor between them, that is electrically closes their shorts. Currently, the rotor is made of aluminium mainly by way of injection molding.

Figure 1 shows that the laminated core made of sheet steel rotor 2 is at the fill between the two located on the end sides of the Fort is AMI for injection molding 6, so formed shaped cavity, which consists of the rotor bars 3 in the laminated core of sheet steel rotor 2, as well as short rings 4 and which are completely filled with aluminum. This schematic layout of the fair for other casting materials. Shorting sleeve 4 has a significantly larger cross-section than the individual rotor bars 3, and in the view of figure 1 is obtained passage 5 with sharp edges between the two cross sections. When using the machine, this structure is loaded mechanically and thermally. Laminated core made of sheet steel rotor 2 is mounted on the shaft 1.

In General the machine is operated with variable speeds and loads, so that these loads become dynamic. On shorting sleeve 4 are due to the relatively large volume of relatively large centrifugal force. When using aluminum should also be taken into consideration that thermal expansion coefficient of this material is almost twice as large than steel, that is, when caused by the load allocation of the temperature in the rotor shorting sleeve 4 is growing stronger than laminated core made of sheet steel rotor 2. Both of these effects lead to the radial offset of the short number of the CA to the outside. The rotor bars 3 by sealing in the laminated core of sheet steel rotor 2 cannot freely follow this movement, which may result due to the cutting load in the place of the incision 5 to unacceptably high stresses and to break the connection of the rotor bars 3 and short rings. Especially in the case of short-circuited windings from aluminum, this effect severely limits the scope of the rotor relative to the operating conditions of the electric machine (speed, load).

Figure 2 shows a portion corresponding to the invention of the squirrel-cage rotor with a squirrel cage. The invention squirrel-cage rotor with a squirrel cage high cutting load at the connection point between the rotor bars 3 and short rings 4 directly suppressed. Massive end plate 9 contains any part of the cross section short ring and the choice of enlarged cross-section of the rod 7 or transition radius 8 or both. Thus short ring 4 of the hazardous crossing is not allowed to move radially outward and obemeata.

The face plate 9 contains the most part of the rotor core 3 and a part of the short ring 4. This measure affected p is the transition from a core of the rotor 3 shorting sleeve 4 fully reinforced with more high-strength material. The advantage is that you need to apply only a single structural element, and a reinforcement made by pouring short ring 4, can fall away. Due to this simple way expands the scope of the operating modes of the cast of the rotor relative rotational speeds and temperatures.

Alternative rotor winding is made not by the method of casting of semi-finished products (rods and rings), preferably made of copper, and thereby make possible a high load.

FIGURE 3 shows part of another corresponding to the invention of the squirrel-cage rotor with a squirrel cage. Figure 3 face plate 9 contains for each terminal the rotor 3 hole 10, which is not necessarily exactly match the cross section of the rotor core and may also be, in principle, is located in a radial position otherwise, up until resultwise hence the transition of the cross-section remains within tolerances as from the point of view of manufacturing technology, and operating parameters of the electric machine. In addition, the face plate 9 contains a corresponding to the invention part of the short ring 11 in a rotationally symmetric form. It is also possible to combine in one hole 10 in the end plate 9 a few rods of the rotor about ODI 3. Figure 4 part corresponding to the invention of the squirrel-cage rotor with a squirrel cage figure 3 shows a different angle of view.

Figure 5 is similar to FIGURE 3, only the outside face of the plate 9 part short ring 4 is made of any cross-section. 6 shows a portion corresponding to the invention of the squirrel-cage rotor with a squirrel cage with 5 different angle of view.

As another form of execution FIG.7 shows the face plate 9, which in one or more possible locations has a transition radius 8. FIG shows a portion corresponding to the invention of the squirrel-cage rotor with a squirrel cage with 7 different angle of view.

Figure 9 presents the following relevant to the invention of a form of execution, and here inside face of the plate 9 is a full cross-section of the short ring 4. FIGURE 10 shows the part corresponding to the invention of the squirrel-cage rotor with a squirrel cage on FIG.9 different angle of view.

As a further detail 11 shows a form of execution in which the face plate 9 in the area of binding to the shaft 1 is reduced in its thickness, or, respectively, the refuse from the binding. Further, it is possible to provide recourse from the terminals of the rotor about the coils 3 side short ring 4 running radially outward and tangentially passing grooves, so during the operation of the asynchronous machine comes short cooling ring 4. FIG shows a portion corresponding to the invention of the squirrel-cage rotor with a squirrel cage on 11 different angle of view.

FIG shows an exemplary asynchronous machine with the housing 12 and the transmission 13 conclusions.

1. Asynchronous machine with a stator and a squirrel cage induction motors with squirrel cage, with squirrel-cage rotor with a squirrel cage includes a shaft (1) and laminated core made of sheet steel (2) in the laminated core of sheet steel (2) are the terminals of the rotor winding (3), which are at both ends of the laminated core steel sheet (2) are fed through the holes (10), respectively, one end of the plate (9) and short-circuited ring (4)which is electrically conductive way connects the ends of the rotor bars (3) one side of the squirrel-cage rotor with a squirrel cell, and each end plate (9) contains part of the rotor bars (3) and part of the short ring (4), and each end plate (9) has a circumferential flange which is at least partially attached flush to the outer side of the short ring (4), characterized in that the end plate (9) is made of massive and have compared what about the terminals of the rotor winding (3) and short rings (4) higher-strength material, while the rotor bars (3) have at their ends thickening with increased cross-section of the rod (7), and at least part of the thickening of the rotor bars (3) lies in the holes (10) end plate (9), and the transition between the thickening and the short ring (4) is designed as a rounded transition radius (8).

2. The asynchronous machine according to claim 1, characterized in that the number of holes (10) end plate (9) is equal to the number of rotor bars (3).

3. The asynchronous machine according to claim 1 or 2, characterized in that the number of holes (10) end plate (9) is smaller than the number of rotor bars (3), so through one hole (10) takes a few rods of the rotor winding (3).

4. The asynchronous machine according to claim 1, characterized in that each end plate (9) contains an additional circumferential flange which is at least partially attached flush to the inner side of the short ring (4).

5. The asynchronous machine according to claim 1, characterized in that the transitions in the profile of the rotor bars (3) and/or short rings (4) in the enclosed end plate (9) of the region made in the form of curves with a pre-defined transition radius (8).

6. The asynchronous machine according to claim 1, characterized in that the mechanical dps is Stina (9) in the area of the shaft (1) has a relatively small thickness of the material or is so large middle hole, so it does not touch the shaft (1).

7. The asynchronous machine according to claim 1, characterized in that the rotor bars (3) and the short ring (4) is made of copper or aluminum.

8. The asynchronous machine according to claim 1, characterized in that the rotor bars (3) and the short ring (4) is molded by injection molding in a single piece.

9. The asynchronous machine according to claim 1, characterized in that the shorting sleeve (4) facing away from the rotor bars (3) side contains passing radially outwards and/or tangentially passing grooves, so that the cooling of the short ring (4) occurs especially during operation of the asynchronous machine.

 

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