CN217036860U - Rotor punching sheet for low-speed large-torque motor - Google Patents
Rotor punching sheet for low-speed large-torque motor Download PDFInfo
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- CN217036860U CN217036860U CN202122443063.2U CN202122443063U CN217036860U CN 217036860 U CN217036860 U CN 217036860U CN 202122443063 U CN202122443063 U CN 202122443063U CN 217036860 U CN217036860 U CN 217036860U
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Abstract
The utility model discloses a rotor punching sheet for a low-speed large-torque motor, which comprises a punching sheet body, an outer edge part, a magnetic isolation bridge hole, a vent hole, a mounting hole, a connecting hole and an end plate, wherein the outer edge part is provided with a magnetic isolation bridge hole; the end plate is provided with a through hole and a threaded hole; according to the utility model, the air gaps of the stator and the rotor are closer to sinusoidal distribution through the arrangement of the outer edge part, when the air gaps of the motor are closer to sinusoidal distribution, the closer the air gaps of the stator and the rotor are to sinusoidal under the condition that the magnetic steel excitation is uniform and constant, the lower the harmonic content of the excitation air gap magnetic field is, and the smaller the pulsation torque caused by the motor harmonic is; meanwhile, the end plate is provided with the threaded holes, so that when the multilayer punching sheet body is fixed by the end plate, each area of the punching sheet body can be pressed by screwing screws into the threaded holes, so that each part of the punching sheet body is pressed, the fixing effect of the end plate on the punching sheet body is further ensured, and the vibration of the rotor during working is reduced; and when the punching sheet body is detached, the end plate and the punching sheet body can be conveniently separated, so that the rotor is conveniently maintained.
Description
Technical Field
The utility model belongs to the technical field of rotor punching, and particularly relates to a rotor punching for a low-speed and large-torque motor.
Background
During the rotation of the motor, the instantaneous output torque varies with time, but moves up and down around a certain average value, which is called torque ripple. If the torque ripple is large, the load is dragged, and the stability is low. In short, the jitter is large, the speed stability is also influenced, and the energy consumption of the motor is increased.
The permanent magnet motor has the advantages of small volume, light weight, high efficiency, energy conservation and the like, and is widely applied to the aspects of industrial production, civil use and the like. With the emergence of novel permanent magnetic materials, modern rare earth permanent magnet motors have a trend towards high power and high speed development, and are applied more and more widely in transmission systems. In the design of a high-power permanent magnet motor, a rotor winding of the motor is usually a formed winding, a rotor punching sheet adopts a rectangular open slot, the width of the slot opening is large, a strong tooth socket effect can be generated, and the motor is accompanied by large tooth harmonic potential, tooth socket torque and torque pulsation in the operation process. The existing permanent magnet motor generally adopts a mode of enlarging a stator and rotor uniform air gap and adopting a rotor skewed slot or a rotor skewed pole to reduce motor torque pulsation, however, the mode has some defects: the rotor chute has high process difficulty, and the rotor can rotate to different degrees after the chute is welded, so that the consistency of the rotor core of the motor is poor, and the performance of the same batch of motors is different; the rotor oblique pole has the defects that the rotor assembly difficulty is increased, the rotor oblique pole needs to be installed through a section of reversed phase, and if the rotor oblique pole is installed in a wrong mode, the whole rotor is scrapped most seriously. The output torque of the motor is reduced no matter the rotor chute and the rotor oblique pole are increased or the air gap is enlarged, the counter electromotive force of the motor is reduced, the current of the motor is increased, and the efficiency is lowered. The overall performance of the motor is affected; and the rotor is when the equipment, need use the end cover to carry on spacingly to the punching sheet, and current end cover often not inseparable enough with being connected towards the piece when using, and make rotor mass distribution inhomogeneous everywhere for the rotor produces the vibration when rotating, produces the influence to the work of motor.
SUMMERY OF THE UTILITY MODEL
The utility model provides a rotor punching sheet for a low-speed large-torque motor, aiming at overcoming the defects of the prior art.
The technical scheme provided by the utility model is as follows: the utility model provides a rotor punching that low-speed big moment of torsion motor used which characterized in that: comprises that
The punching sheet body is formed by punching a 0.3mm silicon steel sheet;
the outer edge part is arranged on the periphery of the punching sheet body and is eccentrically arranged with the punching sheet body;
the magnetic isolation bridge hole is arranged on the outer edge part and used for mounting magnetic steel;
the ventilation holes are arranged on the punching sheet body, are positioned on the inner side of the magnetic isolation bridge hole and correspond to the outer edge part one by one;
the mounting hole is arranged in the middle of the punching sheet body and is concentric with the punching sheet body;
the connecting holes are arranged among the vent holes;
the end plate is arranged on the periphery of the whole punched piece body of the multilayer punched piece and used for preventing the magnetic steel from moving out of the magnetic isolation bridge hole; the end plate is provided with through holes which correspond to the connecting holes one by one; the end plate is also provided with a threaded hole; the threaded hole faces the outer edge surface.
Furthermore, the vent hole is formed by mutually connecting and encircling a first straight edge, a second straight edge, a third straight edge, a fourth straight edge and an arc-shaped edge; the arc-shaped edge is positioned on the inner side of the vent hole and is concentrically arranged with the outer edge part; the first straight edge and the second straight edge are positioned on the outer side of the vent hole; the third straight edge and the fourth straight edge are respectively positioned at the left side and the right side of the arc-shaped edge; the end plate comprises a circular ring part and a plurality of connecting ribs which are arranged on the inner side of the circular ring part and correspond to the vent holes one by one; the two sides of the connecting rib are flush with the third straight edge and the fourth straight edge of the two adjacent vent holes respectively; the through holes are correspondingly arranged in the middle of each connecting rib one by one; the threaded holes are circumferentially distributed on the circular ring part; the inner side of the circular ring part is positioned at the outer side of the joint of the first straight edge and the second straight edge.
Further, the number of the outer edge portions is even; a first side edge and a second side edge are respectively arranged on two sides of the outer edge part; and a notch is arranged between the first side edge and the second side edge of the two adjacent outer edge parts.
Furthermore, a key groove is formed in the outer side of the mounting hole; the key groove is a square hole; positioning holes are formed in the outer sides of the key grooves; the positioning hole is communicated with the key groove; the locating hole is a semicircular hole and is tangent to the side wall of the key groove.
In conclusion, the air gaps of the stator and the rotor are closer to sinusoidal distribution through the arrangement of the outer edge part, when the air gaps of the motor are closer to sinusoidal distribution, the closer the air gaps of the stator and the rotor are to sinusoidal distribution under the condition that the magnetic steel excitation is uniform and constant, the lower the harmonic content of the magnetic field of the excitation air gap is, and the smaller the pulsation torque caused by the harmonic of the motor is; meanwhile, the end plate is provided with the threaded holes, so that when the multilayer punching sheet body is fixed by the end plate, each area of the punching sheet body can be pressed by screwing screws into the threaded holes, so that each part of the punching sheet body is pressed, the fixing effect of the end plate on the punching sheet body is further ensured, and the vibration of the rotor during working is reduced; and when the punching sheet body is detached, the end plate and the punching sheet body can be conveniently separated, so that the rotor is conveniently maintained.
Drawings
FIG. 1 is a schematic view of the present invention.
Fig. 2 is a plan view of the punch body in fig. 1.
Fig. 3 is a plan view of a punching sheet body in another embodiment of the utility model.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
Example one
Referring to fig. 1 and fig. 2, a rotor sheet for a low-speed large-torque motor is characterized in that: the punching sheet comprises a punching sheet body 1, wherein the punching sheet body is formed by punching a 0.3mm silicon steel sheet; a plurality of outer edge parts 2 are circumferentially distributed on the periphery of the punching sheet body 1, and each outer edge part 2 is eccentrically arranged with the punching sheet body 1; each outer edge part 2 is provided with two magnetic isolation bridge holes 3 which are mutually isolated and symmetrically arranged, and the magnetic isolation bridge holes 3 are used for installing a corresponding number of magnetic steels; the outer edge part 2 and the punching sheet body 1 which are eccentrically arranged are utilized to obtain that the air gaps of the stator and the rotor are closer to sinusoidal distribution, when the air gaps of the motor are closer to sinusoidal distribution, according to a formula, under the condition that the magnetic steel excitation F is uniform and constant, the closer the air gaps of the stator and the rotor are to sinusoidal, the lower the harmonic content of the magnetic field of the excitation air gap is, and the smaller the pulsation torque caused by the harmonic of the motor is, so that the motor can be stably controlled, and the motor can stably run; the punching sheet body 1 is provided with vent holes 4, the vent holes 4 are positioned on the inner side of the magnetic isolation bridge holes 3 and correspond to the outer edge parts 2 one by one, and the vent holes are used for cooling the magnetic steel, reducing the whole weight of the rotor and reducing the rotational inertia; the middle part of the punching sheet body 1 is provided with a mounting hole 5, and the mounting hole 5 is concentric with the punching sheet body 1 and is used for connecting the punching sheet body 1 with a rotor rotating shaft; still be equipped with connecting hole 6 towards piece body 1 on, connecting hole 6 is located between each ventilation hole 4.
When the rotor is assembled, the punching sheet bodies 1 are arranged in a layered mode and are subjected to punch forming, then the punching sheet bodies 1 are fixed outside the multi-layer punching sheet body by utilizing an end plate 7, and the end plate 7 covers the magnetic separation bridge hole 3 and is used for preventing the magnetic steel from moving out of the magnetic separation bridge hole 3 and enabling the magnetic steel to be arranged in the magnetic separation bridge hole 3; the end plates 7 are provided with through holes 71, the through holes 71 correspond to the connecting holes 6 one by one, and when the multi-layer punching sheet is used, a commercially available stud penetrates through the through holes 71 and the connecting holes 6, and the end parts of the stud are fixed by nuts, so that the end plates 7 on two sides and the multi-layer punching sheet body 1 are fixed mutually; the end plate 7 is also provided with threaded holes 72, the threaded holes 72 are over against the surface of the outer edge part 2, and the end plate 7 and the punching sheet body are connected and formed in the process of assembling the rotor, screws are screwed into the threaded holes 72 and pressure is applied to all areas of the punching sheet body 1, so that the punching sheet body 1 is compacted again, nuts connected to the studs are continuously screwed, all parts of the end plate 7 are in full contact with the punching sheet body, the fixing effect is guaranteed, after the assembly is completed and the screws are taken down, the weight of the rotor is kept uniform, the vibration amplitude of the rotor during rotation is reduced, and the motor can be further guaranteed to work stably; when the rotor needs to be disassembled for maintenance, after the stud and the nut are loosened, the screw is screwed into the threaded hole 72, so that the separation of the end cover and the punching sheet body 1 is promoted, and the rotor is convenient to maintain.
Further, the vent hole 4 is formed by mutually connecting a first straight edge 41, a second straight edge 42, a third straight edge 43, a fourth straight edge 44 and an arc-shaped edge 45 in a winding manner, and a chamfer is formed between each adjacent straight edge and the arc-shaped edge 45; the arc-shaped edge 45 is positioned on the inner side of the vent hole 4 and is concentric with the outer edge 2; the third straight edge 43 and the fourth straight edge 44 are respectively positioned at the left side and the right side of the arc-shaped edge 45; the first straight edge 41 and the second straight edge 42 are positioned on the outer side of the vent hole 4, and the connection position of the first straight edge and the second straight edge is positioned on the extension line of the central line of the magnetism isolating bridge hole 3, so that the vent hole 4 is close to the magnetism isolating bridge hole 3 and is uniformly distributed on the two sides of the magnetism isolating bridge hole 3 to ensure the heat dissipation effect of the vent hole on the magnetic steel in the magnetism isolating bridge hole 3; the end plate 7 includes a circular portion 73 and a plurality of connecting ribs 74 provided on the inner side of the circular portion 73 and corresponding to the vent holes 4 one by one; the connecting ribs 74 are respectively flush with the third straight edge 43 and the fourth straight edge 44 of the two adjacent ventilation holes 4, the middle parts of the connecting ribs 74 are arranged in the through holes 71 in a one-to-one correspondence manner, the threaded holes 72 are circumferentially distributed on the circular ring part 73, and the inner side of the circular ring part 73 is positioned at the outer side of the joint of the first straight edge 41 and the second straight edge 42, so that the end plate 7 is connected with the punching sheet body 1, the end plate 7 is isolated from the ventilation holes 4, and the heat dissipation effect of the ventilation holes 4 is ensured.
Furthermore, the number of the outer edge parts 2 is at least eight, and the number of the outer edge parts 2 is an even number, so that when the rotor rotates, the centrifugal force applied to each position is uniform, the centrifugal forces applied to the two outer edge parts 2 positioned at the opposite sides are mutually offset, the rotor is prevented from shifting in the working process, and the stability of the rotor is improved; 2 both sides of outer fringe part are equipped with first side 21 and second side 22 respectively, be equipped with breach 23 between the first side 21 of two adjacent outer fringe parts 2 and the second side 22 for make towards piece body 1 after setting up outer fringe part 2, its whole quality keeps unanimous with the piece quality of punching of conventional rotor, with this adaptation rate of guaranteeing the rotor to each motor, make simultaneously magnetic isolation bridge hole 3 and the distance of punching 1 outward flange of piece body reduce, promote the radiation heat dissipation of magnet steel to external.
Further, a key groove 51 is arranged outside the mounting hole 5; the key groove 51 is a square hole; a positioning hole 52 is arranged outside the key groove 51; the positioning hole 52 is communicated with the key groove 51; the positioning hole 52 is a semicircular hole and is tangent to the side wall of the key groove 51; through setting up the hole of stalling and locating hole 52 for this rotor body can general asynchronous machine's frame and pivot, increases the scope that the rotor punching can use, improves the rate of adaptation of rotor punching.
Example two
The difference between the present embodiment and the first embodiment is that, referring to fig. 3, when the adjacent outer edge portions 2 are connected to each other and a groove 24 is formed at the connection position, the air gap is reduced at the outer edge portion 2, and the motor jitter is reduced, so that when the rotor sheet provided by the present invention is applied to the interior permanent magnet rotor, the cogging torque and the torque pulsation of the motor can reach the effect of the skewed slot or the skewed pole on the basis of no stator skewed slot or rotor skewed pole, which makes up the technical defects of poor manufacturing manufacturability and high production cost caused by the fact that the interior permanent magnet rotor structure cannot adopt a continuous manufacturing method of the skewed pole in which each sheet of sheet, the performance of the motor is improved.
Further, in the embodiment, the magnetic isolation bridge hole 3 adopts the deep groove structure 8 between the N pole and the S pole of the magnetic steel, and the magnetic steel is placed in the magnetic isolation bridge hole 3 by matching with the end sleeve, so that the quadrature axis and direct axis inductance of the motor are increased, the reluctance torque is fully utilized, and the output torque of the motor is increased.
Further, in this embodiment, the number of the vent holes 4 is equal to the number of the poles of the motor and the number of the magnetic isolation bridge holes 3, and is at least eight.
Claims (4)
1. The utility model provides a rotor punching that low-speed big moment of torsion motor used which characterized in that: comprises that
The punching sheet body (1) is formed by punching a 0.3mm silicon steel sheet;
the outer edge part (2) is arranged at the periphery of the punching sheet body (1) and is eccentrically arranged with the punching sheet body (1);
the magnetic isolation bridge hole (3) is arranged on the outer edge part (2) and is used for mounting magnetic steel;
the ventilation holes (4) are arranged on the punching sheet body (1), are positioned on the inner side of the magnetic isolation bridge hole (3), and correspond to the outer edge parts (2) one by one;
the mounting hole (5) is formed in the middle of the punching sheet body (1) and is concentric with the punching sheet body (1);
the connecting holes (6) are arranged among the vent holes (4);
the end plate (7) is arranged at the periphery of the whole stamped multilayer stamped steel body (1) and used for preventing the magnetic steel from moving out of the magnetic isolation bridge hole (3); through holes (71) are formed in the end plate (7), and the through holes (71) correspond to the connecting holes (6) one by one; the end plate (7) is also provided with a threaded hole (72); the threaded hole (72) is opposite to the surface of the outer edge part (2).
2. The rotor sheet for the low-speed large-torque motor as claimed in claim 1, wherein: the ventilation hole (4) is formed by mutually connecting and winding a first straight edge (41), a second straight edge (42), a third straight edge (43), a fourth straight edge (44) and an arc-shaped edge (45); the arc-shaped edge (45) is positioned on the inner side of the vent hole (4) and is concentrically arranged with the outer edge part (2); the first straight edge (41) and the second straight edge (42) are located on the outer side of the vent hole (4); the third straight edge (43) and the fourth straight edge (44) are respectively positioned at the left side and the right side of the arc-shaped edge (45); the end plate (7) comprises a circular ring part (73) and a plurality of connecting ribs (74) which are arranged on the inner side of the circular ring part (73) and correspond to the vent holes (4) one by one; the two sides of the connecting rib (74) are respectively flush with the third straight edges (43) and the fourth straight edges (44) of the two adjacent vent holes (4); the through holes (71) are correspondingly arranged in the middle of each connecting rib (74) one by one; the threaded holes (72) are circumferentially distributed on the circular ring part (73); the inner side of the circular ring part (73) is positioned at the outer side of the joint of the first straight edge (41) and the second straight edge (42).
3. The rotor sheet for the low-speed and high-torque motor as claimed in claim 1, wherein: the number of the outer edge parts (2) is even; a first side edge (21) and a second side edge (22) are respectively arranged on two sides of the outer edge part (2); a gap (23) is arranged between the first side edge (21) and the second side edge (22) of the two adjacent outer edge parts (2).
4. The rotor sheet for the low-speed large-torque motor as claimed in claim 1, wherein: a key groove (51) is formed in the outer side of the mounting hole (5); the key groove (51) is a square hole; a positioning hole (52) is formed in the outer side of the key groove (51); the positioning hole (52) is communicated with the key groove (51); the positioning hole (52) is a semicircular hole and is tangent to the side wall of the key groove (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122443063.2U CN217036860U (en) | 2021-10-11 | 2021-10-11 | Rotor punching sheet for low-speed large-torque motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122443063.2U CN217036860U (en) | 2021-10-11 | 2021-10-11 | Rotor punching sheet for low-speed large-torque motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217036860U true CN217036860U (en) | 2022-07-22 |
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ID=82439793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122443063.2U Active CN217036860U (en) | 2021-10-11 | 2021-10-11 | Rotor punching sheet for low-speed large-torque motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217036860U (en) |
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2021
- 2021-10-11 CN CN202122443063.2U patent/CN217036860U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A Rotor Blanking for Low Speed and High Torque Motors Effective date of registration: 20220922 Granted publication date: 20220722 Pledgee: Bank of Jinhua Limited by Share Ltd. science and Technology Branch Pledgor: JINHUA JIANGKE POWER Co.,Ltd. Registration number: Y2022980016005 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230920 Granted publication date: 20220722 Pledgee: Bank of Jinhua Limited by Share Ltd. science and Technology Branch Pledgor: JINHUA JIANGKE POWER Co.,Ltd. Registration number: Y2022980016005 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A rotor punching plate for low speed and high torque motors Effective date of registration: 20230924 Granted publication date: 20220722 Pledgee: Bank of Jinhua Limited by Share Ltd. science and Technology Branch Pledgor: JINHUA JIANGKE POWER Co.,Ltd. Registration number: Y2023980058711 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |