CN218829297U - Rotor punching sheet structure of permanent magnet synchronous motor - Google Patents
Rotor punching sheet structure of permanent magnet synchronous motor Download PDFInfo
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- CN218829297U CN218829297U CN202223449834.XU CN202223449834U CN218829297U CN 218829297 U CN218829297 U CN 218829297U CN 202223449834 U CN202223449834 U CN 202223449834U CN 218829297 U CN218829297 U CN 218829297U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The utility model discloses a PMSM rotor punching structure relates to PMSM technical field. The rotor punching structure comprises a rotor punching body, and a plurality of magnetic pole structures which are arranged in a central symmetry manner relative to the transverse axis or the vertical axis of the rotor punching body are arranged on the rotor punching body; the magnetic pole structure comprises a magnetic steel groove structure and a magnetism isolating groove structure, the magnetic steel groove structure comprises a first magnetic steel groove and a second magnetic steel groove which are arranged at an included angle, and a third magnetic steel groove and a fourth magnetic steel groove which are arranged at the side of the opening of the included angle of the first magnetic steel groove and the second magnetic steel groove and are arranged at an included angle; the included angle opening formed by the rotor punching sheet and the rotor punching sheet is arranged along the radial direction of the rotor punching sheet body towards the outward direction; the magnetism isolating groove structure comprises a first magnetism isolating groove and a sixth magnetism isolating groove, wherein the first magnetism isolating groove is formed in the first magnetic steel groove at intervals and is far away from one side of the second magnetic steel groove, and the sixth magnetism isolating groove is formed in the second magnetic steel groove at intervals and is far away from one side of the first magnetic steel groove. The utility model discloses technical scheme can improve the magnetic resistance of motor and turn round the sine degree of proportion and response electromotive force.
Description
Technical Field
The utility model relates to a PMSM technical field, in particular to PMSM rotor punching structure.
Background
With the continuous upgrade of new energy electric automobile technology, the rotation speed of the permanent magnet synchronous driving motor developed in the early stage is low (the highest rotation speed is less than or equal to 10000 rpm), the stress intensity of the rotor punching sheet is not enough to meet the requirement of high rotation speed (the highest rotation speed is less than or equal to 20000 rpm), and the outer circle of the rotor of the traditional ultra-high speed motor is sheathed with a sheath (carbon fiber and titanium alloy) to cause the complex motor process and increase the cost. The sine degree of counter potential waveform of the rotor developed in the early stage is poor, and the problem of NVH (Noise, vibration and Harshness) caused by the design of the magnetic pole structure of the rotor punching sheet is more and more prominent; the motor has low power density and torque density, large volume and low proportion of reluctance torque of the motor, thus leading to large magnetic steel consumption and high motor cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a PMSM rotor punching structure aims at solving the problem that the reluctance torque proportion of current motor is low, the influence electromotive force waveform sine degree is poor.
In order to achieve the above object, the utility model provides a PMSM rotor punching structure, include:
the rotor punching sheet comprises a rotor punching sheet body, wherein a plurality of magnetic pole structures are arranged on the rotor punching sheet body, the number of the magnetic pole structures is equal to the number of poles of a motor, and the magnetic pole structures are arranged in a central symmetry mode relative to a transverse axis or a vertical axis of the rotor punching sheet body;
the magnetic pole structure comprises a magnetic steel groove structure and a magnetism isolating groove structure, the magnetic steel groove structure comprises an outer ring groove group and an inner ring groove group, the inner ring groove group comprises a first magnetic steel groove and a second magnetic steel groove which are arranged at an included angle, the outer ring groove group is arranged on one side of an opening of the included angle of the first magnetic steel groove and the second magnetic steel groove and comprises a third magnetic steel groove and a fourth magnetic steel groove which are arranged at an included angle; the first magnetic steel groove, the second magnetic steel groove and the third magnetic steel groove and the fourth magnetic steel groove form included angle openings which are all arranged along the radial direction of the rotor punching sheet body towards the outward direction; the magnetism isolating groove structure comprises a first magnetism isolating groove and a sixth magnetism isolating groove, the first magnetism isolating groove is arranged at an interval, the first magnetic steel groove is far away from one side of the second magnetic steel groove, and the sixth magnetism isolating groove is arranged at an interval, the second magnetic steel groove is far away from one side of the first magnetic steel groove.
In an embodiment, the first magnetic steel groove and the second magnetic steel groove are symmetrically arranged, the third magnetic steel groove and the fourth magnetic steel groove are symmetrically arranged, the first magnetic steel groove and the third magnetic steel groove are located on the same side of the radial axis, and an included angle formed by the first magnetic steel groove and the third magnetic steel groove ranges from 0 ° to 30 °.
In an embodiment, the magnetism isolating groove structure further includes a second magnetism isolating groove and a third magnetism isolating groove on the opposite side, wherein the second magnetism isolating groove is arranged on one side, close to the first magnetism isolating groove, of the first magnetic steel groove in a communicated manner, a fourth magnetism isolating groove and a fifth magnetism isolating groove on the opposite side are arranged on one side, close to the first magnetic steel groove in the second magnetic steel groove in a communicated manner, a seventh magnetism isolating groove and an eighth magnetism isolating groove on the opposite side are arranged on one side, far away from the fourth magnetic steel groove in the third magnetic steel groove in a communicated manner, and a ninth magnetism isolating groove and a tenth magnetism isolating groove on the opposite side are arranged on one side, close to the third magnetic steel groove in the fourth magnetic steel groove in a communicated manner.
In an embodiment, the magnetism isolating groove structure further includes a first magnetism isolating groove and a sixth magnetism isolating groove, the first magnetism isolating groove is disposed on a side of the second magnetism isolating groove away from the first magnetic steel groove, and the sixth magnetism isolating groove is disposed on a side of the fifth magnetism isolating groove away from the second magnetic steel groove.
In an embodiment, the first magnetism isolating groove and the sixth magnetism isolating groove are symmetrically arranged, the second magnetism isolating groove and the fifth magnetism isolating groove are symmetrically arranged, the third magnetism isolating groove and the fourth magnetism isolating groove are symmetrically arranged, the seventh magnetism isolating groove and the tenth magnetism isolating groove are symmetrically arranged, and the eighth magnetism isolating groove and the ninth magnetism isolating groove are symmetrically arranged relative to the symmetry axis of the first magnetism isolating groove and the second magnetism isolating groove.
In an embodiment, each of the first magnetism isolating groove, the sixth magnetism isolating groove, the seventh magnetism isolating groove and the tenth magnetism isolating groove includes at least two opposite sides arranged in parallel, and in two adjacent magnetic pole structures, the angle formed by the opposite sides of the first magnetism isolating groove, the sixth magnetism isolating groove, the seventh magnetism isolating groove and the tenth magnetism isolating groove and the symmetry axis of the two magnetic pole structures is in the range of 0-30 °.
In an embodiment, the rotor punching sheet body includes a reinforcing rib structure, and the reinforcing rib structure includes a first reinforcing rib and a second reinforcing rib opposite to each other on one side of the first magnetism isolating groove away from the second magnetism isolating groove, a third reinforcing rib between the third magnetism isolating groove and the fourth magnetism isolating groove, a fourth reinforcing rib and a fifth reinforcing rib opposite to each other on one side of the sixth magnetism isolating groove close to the fifth magnetism isolating groove, a sixth reinforcing rib on one side of the seventh magnetism isolating groove away from the third magnetic steel groove, a seventh reinforcing rib between the eighth magnetism isolating groove and the ninth magnetism isolating groove, and an eighth reinforcing rib on one side of the tenth magnetism isolating groove away from the fourth magnetic steel groove.
In an embodiment, the first reinforcing rib, the second reinforcing rib, the third reinforcing rib, the fourth reinforcing rib, the fifth reinforcing rib, the sixth reinforcing rib, the seventh reinforcing rib and the eighth reinforcing rib are arranged in a bar shape, and the distance between the first reinforcing rib, the second reinforcing rib, the third reinforcing rib, the fourth reinforcing rib, the fifth reinforcing rib, the sixth reinforcing rib, the seventh reinforcing rib and the eighth reinforcing rib close to the two sides of the magnetism isolating groove structure is smaller than the distance between the other two sides.
In one embodiment, the rotor punching sheet is characterized in that a shaft hole and a plurality of weight removing holes are further formed in the rotor punching sheet body, the shaft hole is formed in the center of the rotor punching sheet body, the plurality of weight removing holes are circumferentially formed in the outer side of the shaft hole and located on the symmetry axis of two adjacent magnetic pole structures, and the number of the weight removing holes is equal to the number of poles of the motor.
In one embodiment, the rotor sheet body is further provided with a plurality of assembling process holes, and the assembling process holes are circumferentially arranged on the outer side of the shaft hole; the magnetic pole structure is arranged symmetrically relative to a radial axis of the rotor punching sheet body, the assembling process holes are located on the same symmetrical axis of the magnetic pole structure, and the number of the assembling process holes is equal to the number of poles of the motor.
In an embodiment, the assembly process holes include a first assembly process hole and a second assembly process hole, the first assembly process hole and the second assembly process hole are arranged at intervals in the circumferential direction of the rotor sheet body, the first assembly process hole includes two holes arranged side by side in the circumferential direction of the rotor sheet body, and the two holes are partially overlapped.
Compared with the prior art, the utility model discloses technical effect includes:
1) The reluctance torque ratio is high, so that the power density and the torque density of the motor are improved, the consumption of magnetic steel is reduced, and the cost of the motor is saved;
2) The sine degree of the induced electromotive force of the motor is high, the harmonic content is low, the efficiency of the motor is improved, the torque pulsation is reduced, and the electromagnetic noise of the motor caused by the torque pulsation is reduced;
3) The magnetic flux density of the yoke part and the light weight requirement of the rotor punching are fully and uniformly matched with the yoke part of the rotor punching; the application of a plurality of reinforcing ribs on the magnetic pole part meets the requirement of the rotor strength of the rotor sheet running at the peak rotating speed; meanwhile, the magnetic isolation bridge adopts a long and narrow design, and the magnetic circuit is easy to saturate by the design, so that the magnetic leakage on the magnetic isolation bridge is reduced, the utilization rate of the magnetic steel is improved, and the cost of the magnetic steel is reduced;
4) The rotor punching sheet assembly process hole can meet requirements of oblique poles and non-oblique poles at the same time, and the types of the rotor punching sheet die are saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural view of an embodiment of a rotor sheet structure of a permanent magnet synchronous motor of the present invention;
fig. 2 is a schematic view of a first assembling process hole oblique polar angle according to an embodiment of the structure of the permanent magnet synchronous motor rotor sheet of the present invention;
fig. 3 is the schematic view of the layout of the magnetic isolation slots of the adjacent magnetic pole structure part in the embodiment of the structure of the rotor sheet of the permanent magnet synchronous motor of the present invention.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, back \8230;) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
Furthermore, the descriptions in the present application related to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to imply that the number of technical features indicated are implicitly being indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a PMSM rotor punching structure can improve the magnetic resistance of motor and turn round the sine degree of proportion and induced electromotive force.
Referring to fig. 1, in this embodiment, the rotor punching structure includes a rotor punching body 1, a plurality of magnetic pole structures are arranged on the rotor punching body 1, the number of the magnetic pole structures is equal to the number of poles of a motor, and the plurality of magnetic pole structures are arranged in central symmetry with respect to a horizontal axis or a vertical axis of the rotor punching body 1; the magnetic pole structure comprises a magnetic steel groove structure and a magnetism isolating groove structure, the magnetic steel groove structure comprises an outer ring groove group and an inner ring groove group, the inner ring groove group comprises a first magnetic steel groove 2 and a second magnetic steel groove 5 which are arranged at an included angle, the outer ring groove group is arranged on one side of an opening of the included angle of the first magnetic steel groove 2 and the second magnetic steel groove 5 and comprises a third magnetic steel groove 3 and a fourth magnetic steel groove 4 which are arranged at an included angle; the first magnetic steel groove 2, the second magnetic steel groove 5, the third magnetic steel groove 3 and the fourth magnetic steel groove 4 form included angle openings which are all arranged along the radial direction of the rotor punching sheet body 1 towards the outward direction; the magnetism isolating groove structure comprises a first magnetism isolating groove 6 and a sixth magnetism isolating groove 15, the first magnetism isolating groove 6 is arranged at intervals, the first magnetism steel groove 2 is far away from one side of the second magnetism steel groove 5, the sixth magnetism isolating groove 15 is arranged at intervals, the second magnetism steel groove 5 is far away from one side of the first magnetism steel groove 2.
It can be understood that the number of the magnetic pole structures is equal to the number of poles of the motor, and the rotor punching sheet includes, but is not limited to, a six-pole rotor punching sheet and an eight-pole rotor punching sheet, and in this embodiment, a six-pole rotor punching sheet is taken as an example.
Preferably, relative to a radial axis of the rotor punching sheet body 1, the first magnetic steel groove 2 and the second magnetic steel groove 5 are symmetrically arranged, the third magnetic steel groove 3 and the fourth magnetic steel groove 4 are symmetrically arranged, the first magnetic steel groove 2 and the third magnetic steel groove 3 are located on the same side of the radial axis, and an included angle formed by the first magnetic steel groove 2 and the third magnetic steel groove 3 ranges from 0 degree to 30 degrees.
Specifically, first magnet steel groove 2, second magnet steel groove 5, third magnet steel groove 3 and fourth magnet steel groove 4 all are the rectangle setting, form V font structure between first magnet steel groove 2 and the second magnet steel groove 5, also form V font structure between third magnet steel groove 3 and the fourth magnet steel groove 4, the opening of this V font structure all faces the outside of rotor punching body 1. When the contained angle that forms between first magnetism steel slot 2 and the third magnetism steel slot 3 is 0, be parallel arrangement between first magnetism steel slot 2 and the third magnetism steel slot 3, it is corresponding, also be parallel arrangement between second magnetism steel slot 5 and the fourth magnetism steel slot 4.
On the basis of the above first embodiment, in an embodiment, the magnetism isolating groove structure further includes a second magnetism isolating groove 7 and a third magnetism isolating groove 9 which are communicated with and arranged on one side of the first magnetism steel groove 2 close to the first magnetism isolating groove 6 and on the other side, a fourth magnetism isolating groove 12 and a fifth magnetism isolating groove 14 which are communicated with and arranged on one side of the second magnetism steel groove 5 close to the first magnetism steel groove 2 and on the other side, a seventh magnetism isolating groove 8 and an eighth magnetism isolating groove 10 which are communicated and arranged on one side of the third magnetism steel groove 3 far away from the fourth magnetism steel groove 4 and on the other side, and a ninth magnetism isolating groove 11 and a tenth magnetism isolating groove 13 which are communicated and arranged on one side of the fourth magnetism steel groove 4 close to the third magnetism steel groove 3 and on the other side.
Referring to fig. 2, further, with respect to the symmetry axes of the first magnetic steel groove 2 and the second magnetic steel groove 5, the first magnetism isolating groove 6 and the sixth magnetism isolating groove 15 are symmetrically disposed, the second magnetism isolating groove 7 and the fifth magnetism isolating groove 14 are symmetrically disposed, the third magnetism isolating groove 9 and the fourth magnetism isolating groove 12 are symmetrically disposed, the seventh magnetism isolating groove 8 and the tenth magnetism isolating groove 13 are symmetrically disposed, and the eighth magnetism isolating groove 10 and the ninth magnetism isolating groove 11 are symmetrically disposed.
It can be understood that, relative to a radial axis of the rotor punching sheet body 1, the first magnetic steel slot 2 and the second magnetic steel slot 5 are symmetrically arranged, and the third magnetic steel slot 3 and the fourth magnetic steel slot 4 are symmetrically arranged, that is, it indicates that there is a radial axis of the rotor punching sheet body 1, so that the magnetic steel slot structure in the same magnetic pole structure is symmetrically arranged relative to the radial axis. And relative to the radial axis, the first magnetism isolating groove 6 and the sixth magnetism isolating groove 15 are symmetrically arranged, the second magnetism isolating groove 7 and the fifth magnetism isolating groove 14 are symmetrically arranged, the third magnetism isolating groove 9 and the fourth magnetism isolating groove 12 are symmetrically arranged, the seventh magnetism isolating groove 8 and the tenth magnetism isolating groove 13 are symmetrically arranged, and the eighth magnetism isolating groove 10 and the ninth magnetism isolating groove 11 are symmetrically arranged. I.e. it is shown that the flux barrier structures of the same magnetic pole structure are also symmetrically arranged with respect to the radial axis, so that the whole of the same magnetic pole structure is symmetrically arranged with respect to the radial axis, which is regarded as the symmetry axis 30 of the same magnetic pole structure. The same magnetic pole structure is a symmetrical structure, and the magnetic pole structures are arranged in a central symmetry manner relative to the transverse axis or the vertical axis of the rotor punching sheet body 1, that is, the rotor punching sheet body 1 is also provided with a radial axis, so that the adjacent magnetic pole structures are arranged in a symmetrical manner relative to the radial axis, and the radial axis is set as the symmetrical axis 29 of the adjacent magnetic pole structures.
Preferably, the first magnetism isolating groove 6, the sixth magnetism isolating groove 15, the seventh magnetism isolating groove 8 and the tenth magnetism isolating groove 13 respectively comprise at least two opposite sides which are arranged in parallel, and in the two adjacent magnetic pole structures, the included angle formed by the opposite sides of the first magnetism isolating groove 6, the sixth magnetism isolating groove 15, the seventh magnetism isolating groove 8 and the tenth magnetism isolating groove 13 and the symmetry axis of the two magnetic pole structures (namely the symmetry axis 29 of the adjacent magnetic pole structures) is 0-30 degrees.
Referring to fig. 3, specifically, the two parallel opposite sides of the tenth magnetic isolation groove 13 are a first opposite side 31 and a second opposite side 32, the two parallel opposite sides of the sixth magnetic isolation groove 15 are a third opposite side 33 and a fourth opposite side 34, the two parallel opposite sides of the first magnetic isolation groove 6 are a fifth opposite side 35 and a sixth opposite side 36, and the two parallel opposite sides of the seventh magnetic isolation groove 8 are a seventh opposite side 37 and an eighth opposite side 38. The two opposite sides of the first magnetism isolating groove 6, the sixth magnetism isolating groove 15, the seventh magnetism isolating groove 8 and the tenth magnetism isolating groove 13 can be arranged in other angles which tend to be parallel.
In an embodiment, the rotor punching sheet body 1 includes a rib structure, and the rib structure includes a first rib 16 and a second rib 17 opposite to the first rib on one side of the first magnetism isolating groove 6 far from the second magnetism isolating groove 7, a third rib 20 between the third magnetism isolating groove 9 and the fourth magnetism isolating groove 12, a fourth rib 22 and a fifth rib 23 opposite to the first rib on one side of the sixth magnetism isolating groove 15 close to the fifth magnetism isolating groove 14, a sixth rib 18 on one side of the seventh magnetism isolating groove 8 far from the third magnetism steel groove 3, a seventh rib 19 between the eighth magnetism isolating groove 10 and the ninth magnetism isolating groove 11, and an eighth rib 21 on one side of the tenth magnetism isolating groove 13 far from the fourth magnetism steel groove 4. The reinforcing rib structure meets the requirement of the rotor strength of the rotor sheet when the rotor sheet runs at the peak rotating speed.
Further, the first reinforcing rib 16, the second reinforcing rib 17, the third reinforcing rib 20, the fourth reinforcing rib 22, the fifth reinforcing rib 23, the sixth reinforcing rib 18, the seventh reinforcing rib 19 and the eighth reinforcing rib 21 are arranged in a bar shape, and the first reinforcing rib 16, the second reinforcing rib 17, the third reinforcing rib 20, the fourth reinforcing rib 22, the fifth reinforcing rib 23, the sixth reinforcing rib 18, the seventh reinforcing rib 19 and the eighth reinforcing rib 21 are close to the space between the two sides of the magnetism isolating groove structure and are smaller than the space between the two other sides. That is, under the condition that the strength requirement of the magnetic pole structure on the reinforcing rib structure is met, the first reinforcing rib 16, the second reinforcing rib 17, the third reinforcing rib 20, the fourth reinforcing rib 22, the fifth reinforcing rib 23, the sixth reinforcing rib 18, the seventh reinforcing rib 19 and the eighth reinforcing rib 21 are arranged in a long strip shape, so that a magnetic circuit on the rotor is saturated more easily, namely, the magnetic saturation effect of the reinforcing rib structure is utilized to reduce magnetic leakage, the utilization rate of magnetic steel can be further improved, and the cost of the motor is reduced.
Referring to fig. 1 and 2, in an embodiment, the rotor punching body 1 is further provided with a shaft hole 27 and a plurality of weight removing holes 24, the shaft hole 27 is disposed at the center of the rotor punching body 1, the plurality of weight removing holes 24 are circumferentially disposed at the outer side of the shaft hole 27 and are located on the symmetry axis of two adjacent magnetic pole structures (i.e., the symmetry axis 29 of the adjacent magnetic pole structure), and the number of the weight removing holes 24 is equal to the number of poles of the motor. Through the weight of the rotor punching sheet body 1 is reduced by the weight removing holes 24, the lightweight requirement of the rotor punching sheet is met, the amount of magnetic steel is reduced, and the manufacturing cost of the motor is saved.
In an embodiment, the rotor punching body 1 is further provided with a plurality of assembling process holes, and the assembling process holes are circumferentially arranged on the outer side of the shaft hole 27; the same magnetic pole structure is arranged symmetrically relative to a radial axis of the rotor punching sheet body 1, the assembling process holes are located on the same symmetric axis of the magnetic pole structure (namely the same magnetic pole structure symmetric axis 30), and the number of the assembling process holes is equal to the number of poles of the motor.
Specifically, the assembly process holes include a first assembly process hole 25 and a second assembly process hole 26, the first assembly process hole 25 and the second assembly process hole 26 are arranged at intervals in the circumferential direction of the rotor sheet body 1, the first assembly process hole 25 includes two holes arranged side by side in the circumferential direction of the rotor sheet body 1, and the two holes are partially overlapped. The included angle formed by connecting the circle centers of the two holes of the first assembling process hole 25 and the circle center of the shaft hole 27 is an assembling oblique polar angle 28 (shown in the figure beta), and can be used as the included angle when the oblique poles of the rotor core are stacked in sections. Namely, the first assembling process hole 25 is used for rotor core oblique pole subsection stacking, the second assembling process hole 26 is used for rotor core non-oblique pole subsection stacking, requirements of oblique pole and non-oblique pole are met, and the types of rotor punching die are saved. The first assembly process hole 25 and the second assembly process hole 26 can be made of round holes or other machinable non-round holes; the plurality of first assembly process holes 25 are arranged on a circumference with the same diameter, the plurality of second assembly process holes 26 are also arranged on a circumference with the same diameter, and the diameters of the circumferences where the first assembly process holes 25 and the second assembly process holes 26 are arranged can be the same or different.
The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all under the inventive concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (10)
1. The utility model provides a PMSM rotor punching structure which characterized in that includes:
the rotor punching sheet comprises a rotor punching sheet body, wherein a plurality of magnetic pole structures are arranged on the rotor punching sheet body, the number of the magnetic pole structures is equal to the number of poles of a motor, and the magnetic pole structures are arranged in a central symmetry mode relative to a transverse axis or a vertical axis of the rotor punching sheet body;
the magnetic pole structure comprises a magnetic steel groove structure and a magnetism isolating groove structure, the magnetic steel groove structure comprises an outer ring groove group and an inner ring groove group, the inner ring groove group comprises a first magnetic steel groove and a second magnetic steel groove which are arranged at an included angle, the outer ring groove group is arranged on one side of an opening of the included angle of the first magnetic steel groove and the second magnetic steel groove and comprises a third magnetic steel groove and a fourth magnetic steel groove which are arranged at an included angle; the first magnetic steel groove, the second magnetic steel groove and the third magnetic steel groove and the fourth magnetic steel groove form included angle openings which are all arranged along the radial direction of the rotor punching sheet body towards the outward direction; the magnetism isolating groove structure comprises a first magnetism isolating groove and a sixth magnetism isolating groove, the first magnetism isolating groove is arranged at an interval, the first magnetic steel groove is far away from one side of the second magnetic steel groove, and the sixth magnetism isolating groove is arranged at an interval, the second magnetic steel groove is far away from one side of the first magnetic steel groove.
2. The rotor sheet structure of the permanent magnet synchronous motor according to claim 1, wherein the first magnetic steel groove and the second magnetic steel groove are symmetrically arranged, the third magnetic steel groove and the fourth magnetic steel groove are symmetrically arranged, the first magnetic steel groove and the third magnetic steel groove are located on the same side of a radial axis, and an included angle formed by the first magnetic steel groove and the third magnetic steel groove ranges from 0 ° to 30 °.
3. The PMSM rotor punching sheet structure of claim 2, wherein the magnetism isolating groove structure further comprises a second magnetism isolating groove and a third magnetism isolating groove which are communicated with and arranged on one side, close to the first magnetism isolating groove, of the first magnetic steel groove, a fourth magnetism isolating groove and a fifth magnetism isolating groove which are communicated with and arranged on the other side, close to the first magnetic steel groove, of the second magnetic steel groove, a seventh magnetism isolating groove and an eighth magnetism isolating groove which are communicated and arranged on one side, far away from the fourth magnetic steel groove, of the third magnetic steel groove, of the opposite side, and a ninth magnetism isolating groove and a tenth magnetism isolating groove which are communicated and arranged on one side, close to the third magnetic steel groove, of the fourth magnetic steel groove, of the opposite side.
4. The rotor punching structure of the permanent magnet synchronous motor according to claim 3, wherein the first magnetism isolating groove and the sixth magnetism isolating groove are symmetrically arranged, the second magnetism isolating groove and the fifth magnetism isolating groove are symmetrically arranged, the third magnetism isolating groove and the fourth magnetism isolating groove are symmetrically arranged, the seventh magnetism isolating groove and the tenth magnetism isolating groove are symmetrically arranged, and the eighth magnetism isolating groove and the ninth magnetism isolating groove are symmetrically arranged relative to the symmetry axis of the first magnetism isolating groove and the second magnetism isolating groove.
5. The rotor punching sheet structure of the permanent magnet synchronous motor according to claim 4, wherein the first magnetism isolating groove, the sixth magnetism isolating groove, the seventh magnetism isolating groove and the tenth magnetism isolating groove respectively comprise at least two opposite sides which are arranged in parallel, and in the two adjacent magnetic pole structures, the included angle formed by the opposite sides of the first magnetism isolating groove, the sixth magnetism isolating groove, the seventh magnetism isolating groove and the tenth magnetism isolating groove and the symmetry axis of the two magnetic pole structures is 0-30 degrees.
6. The structure of a rotor punching sheet of a permanent magnet synchronous motor according to claim 3, wherein the rotor punching sheet body comprises a reinforcing rib structure, and the reinforcing rib structure comprises a first reinforcing rib and a second reinforcing rib which are arranged on one side of the first magnetism isolating groove far away from the second magnetism isolating groove, a third reinforcing rib arranged between the third magnetism isolating groove and the fourth magnetism isolating groove, a fourth reinforcing rib and a fifth reinforcing rib which are arranged on one side of the sixth magnetism isolating groove close to the fifth magnetism isolating groove and on the opposite side, a sixth reinforcing rib arranged on one side of the seventh magnetism isolating groove far away from the third magnetic steel groove, a seventh reinforcing rib arranged between the eighth magnetism isolating groove and the ninth magnetism isolating groove, and an eighth reinforcing rib arranged on one side of the tenth magnetism isolating groove far away from the fourth magnetic steel groove.
7. The rotor punching sheet structure of the permanent magnet synchronous motor according to claim 6, wherein the first reinforcing rib, the second reinforcing rib, the third reinforcing rib, the fourth reinforcing rib, the fifth reinforcing rib, the sixth reinforcing rib, the seventh reinforcing rib and the eighth reinforcing rib are arranged in a strip shape, and the distance between the first reinforcing rib, the second reinforcing rib, the third reinforcing rib, the fourth reinforcing rib, the fifth reinforcing rib, the sixth reinforcing rib, the seventh reinforcing rib and the eighth reinforcing rib close to two sides of the magnetism isolating groove structure is smaller than the distance between the other two sides.
8. The rotor sheet structure of the permanent magnet synchronous motor according to any one of claims 1 to 7, wherein the rotor sheet body is further provided with a shaft hole and a plurality of weight removing holes, the shaft hole is formed in the center of the rotor sheet body, the plurality of weight removing holes are circumferentially formed in the outer side of the shaft hole and located on the symmetry axis of two adjacent magnetic pole structures, and the number of the weight removing holes is equal to the number of poles of the motor.
9. The rotor punching structure of the permanent magnet synchronous motor according to claim 8, wherein a plurality of assembling process holes are further formed in the rotor punching body, and the assembling process holes are circumferentially formed in the outer side of the shaft hole; the magnetic pole structure is arranged symmetrically relative to a radial axis of the rotor punching sheet body, the assembling process holes are located on the same symmetrical axis of the magnetic pole structure, and the number of the assembling process holes is equal to the number of poles of the motor.
10. The structure of the rotor sheet of the permanent magnet synchronous motor according to claim 9, wherein the assembly process holes include a first assembly process hole and a second assembly process hole, the first assembly process hole and the second assembly process hole are arranged at intervals in the circumferential direction of the rotor sheet body, the first assembly process hole includes two holes arranged side by side in the circumferential direction of the rotor sheet body, and the two holes are partially overlapped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223449834.XU CN218829297U (en) | 2022-12-22 | 2022-12-22 | Rotor punching sheet structure of permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223449834.XU CN218829297U (en) | 2022-12-22 | 2022-12-22 | Rotor punching sheet structure of permanent magnet synchronous motor |
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