CN210898658U - Stator punching sheet, stator core and permanent magnet motor - Google Patents
Stator punching sheet, stator core and permanent magnet motor Download PDFInfo
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- CN210898658U CN210898658U CN201921992212.7U CN201921992212U CN210898658U CN 210898658 U CN210898658 U CN 210898658U CN 201921992212 U CN201921992212 U CN 201921992212U CN 210898658 U CN210898658 U CN 210898658U
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Abstract
The application provides a stator punching sheet, a stator core and a permanent magnet motor. The stator punching sheet comprises a yoke portion (1), a tooth portion (2) and tooth shoes (3) which are arranged on one side, far away from the yoke portion (1), of the tooth portion (2), wherein the tooth portion (2) is uniformly distributed along the circumferential direction of the yoke portion (1), auxiliary grooves (4) are formed in the inner peripheral wall of at least part of the tooth shoes (3), and the inner peripheral walls of at least two adjacent tooth shoes (3) are different in structure. According to the stator punching sheet, the stator punching sheet can be utilized to form the chute stator core, the combination of the chute and the auxiliary groove is realized, and the torque pulsation is effectively reduced.
Description
Technical Field
The application relates to the technical field of motor equipment, in particular to a stator punching sheet, a stator core and a permanent magnet motor.
Background
Permanent magnet motors are widely used due to their advantages of high efficiency and high power density. The motor outputs electromagnetic torque with certain pulsation, and the pulsation can cause the quality of the output torque of the motor to be poor, thereby causing the vibration of the motor.
In the prior art, a stator chute is utilized, so that the torque pulsation peak value is reduced, and the vibration of a stator is reduced. However, the structure has the disadvantages of complex process, low production efficiency and high cost. In the prior art, an auxiliary groove is formed in a stator tooth part, so that the order of tooth harmonic waves is improved, and vibration caused by low-order harmonic waves is reduced.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem that this application will be solved lies in providing a stator punching, stator core and permanent-magnet machine, can utilize the stator punching to form chute stator core, realizes the combination of chute and auxiliary tank, effectively reduces torque ripple.
In order to solve the problem, the application provides a stator punching sheet, including yoke portion, tooth portion and the tooth boots of setting in the tooth portion and keeping away from yoke portion one side, the circumference evenly distributed of yoke portion is followed to the tooth portion, is provided with supplementary groove on at least partial internal perisporium of tooth boots, and the structure of the internal perisporium of at least two adjacent tooth boots is different.
Preferably, the inner circumferential walls of at least two adjacent tooth shoes are provided with auxiliary grooves, and the auxiliary grooves on the inner circumferential walls of two adjacent tooth shoes are identical in structure.
Preferably, the auxiliary grooves on the inner circumferential walls of two adjacent tooth shoes are identical in structure and different in number.
Preferably, the auxiliary grooves on the inner peripheral walls of two adjacent tooth shoes are identical in structure and number, and at least part of the auxiliary grooves are different in position.
Preferably, the inner circumferential walls of at least two adjacent tooth shoes are provided with auxiliary grooves, and the structures of the auxiliary grooves on the inner circumferential walls of the two adjacent tooth shoes are different.
Preferably, the number of the tooth shoes of the stator punching sheet is z and 2n≤z＜2n+1One of the tooth shoes is used as the initial tooth shoe, and the initial tooth shoe is not provided with an auxiliary groove, and the initial tooth shoe is used as the initial tooth shoe and is arranged in 2 continuous along the rotation direction of the motor rotorn-1 tooth shoes are provided with auxiliary grooves.
Preferably, n is the total number of the positions of the auxiliary slots on the single tooth shoe, the position is marked as 1 when the auxiliary slot is arranged at a certain position on the tooth shoe, the position is marked as 0 when the auxiliary slot is not arranged at a certain position, and the binary digits of the positions are arranged from low to high on any tooth shoe along the rotation direction of the motor rotor and are arranged in 2 in series n1, the auxiliary grooves are arranged in a binary manner in sequence on each tooth shoe in the order from small to large.
Preferably, the number of the tooth shoes is 9, wherein no auxiliary groove is provided on each of the initial tooth shoe and the final tooth shoe, and in the rotation direction of the motor rotor, the initial tooth shoe is used as the first tooth shoe, the final tooth shoe is used as the ninth tooth shoe, the binary number formed by the auxiliary groove on the second tooth shoe is 001, the binary number formed by the auxiliary groove on the third tooth shoe is 010, the binary number formed by the auxiliary groove on the fourth tooth shoe is 011, the binary number formed by the auxiliary groove on the fifth tooth shoe is 100, the binary number formed by the auxiliary groove on the sixth tooth shoe is 101, the binary number formed by the auxiliary groove on the seventh tooth shoe is 110, and the binary number formed by the auxiliary groove on the eighth tooth shoe is 111.
Preferably, the number of the auxiliary grooves is three, in a cross section perpendicular to a central axis of the stator punching sheet, when the auxiliary groove is arranged at a position with the lowest position number, an included angle between a connecting line of the center of the bottom of the auxiliary groove and the center of the stator punching sheet and a central line of the tooth shoe where the auxiliary groove is located is b, and b is (1/5-1/3) × a; when the auxiliary groove is arranged at the middle arrangement position, the auxiliary groove is positioned on the central line of the tooth shoe where the auxiliary groove is positioned; when the auxiliary groove is arranged at the position with the highest number of positions, an included angle between a connecting line of the center of the groove bottom of the auxiliary groove and the center of the stator punching sheet and the center line of the tooth shoe where the auxiliary groove is located is c (1/5-1/3) a, wherein a is a tooth pole angle, and a is 360/z.
Preferably, the number of the tooth shoes is 9, three auxiliary grooves are arranged on one of the tooth shoes, in a cross section perpendicular to the central axis of the stator punching sheet, the auxiliary grooves on two sides in the circumferential direction are symmetrical with respect to the central line of the tooth shoe, and the auxiliary groove in the middle is located on the central line of the tooth shoe.
Preferably, the auxiliary groove has a width of 1.4mm and a depth of 0.7 mm.
Preferably, the width of the auxiliary slot is L2, and the width of the stator slot opening is L1, wherein L2 is (1/3-4/3) × L1.
Preferably, the auxiliary groove has a semicircular, square or triangular cross-section.
According to another aspect of the application, a stator core is provided, which includes the above-mentioned stator lamination, a plurality of stator laminations are stacked to form an axial segment, the number of the stator laminations is zt, z is the number of tooth shoes of each stator lamination, t is the number of the stator laminations in each axial segment, t is a positive integer, starting from the axial segment of the second stator lamination, each axial segment of the stator laminations rotates by a tooth pole angle a relative to the axial segment of the previous stator lamination, wherein the tooth pole angle a is 360/z.
According to another aspect of the present application, there is provided a permanent magnet motor including a stator core as described above.
Preferably, the permanent magnet motor further comprises a motor rotor, the motor rotor is arranged on the inner peripheral side of the stator core, an air gap is formed between the motor rotor and the stator core, the thickness of the air gap is H1, and the depth of the auxiliary slot is H2, wherein H2 is (1/2-3/2) × H1.
Preferably, the permanent magnet motor further comprises a motor rotor, the motor rotor is arranged on the inner peripheral side of the stator core, an air gap is formed between the motor rotor and the stator core, the thickness of the air gap is 0.8mm, and the width of the notch of the stator core is 3.2 mm.
The application provides a stator punching sheet, keep away from the tooth boots of yoke portion one side including yoke portion, tooth portion and setting at the tooth portion, the tooth portion is provided with supplementary groove along the circumference evenly distributed of yoke portion on at least partial tooth boots's the internal perisporium, and the structure of the internal perisporium of two at least adjacent tooth boots is different. When the stator core is formed by the stator punching sheets, the stator punching sheets can be laminated, sequentially rotating an angle along the same direction, so that the finally formed stator core can have the effect of a stator skewed slot, and at the same time, because the auxiliary groove is arranged on at least part of the inner peripheral wall of the tooth shoe, the structures of the inner peripheral walls of at least two adjacent tooth shoes are different, therefore, in the process of stator punching sheet rotation, the auxiliary slots also rotate along with the stator punching sheet, so that only one punching sheet is needed to form the auxiliary slots on each tooth shoe of the finally formed stator core, the process is simpler, the auxiliary slots can be utilized to improve the tooth harmonic order, thereby can utilize the stator towards piece and form chute stator core, utilize the stator towards the last auxiliary tank of piece to make the stator core who finally forms can realize the combination of chute and auxiliary tank, effectively reduce torque pulsation.
Drawings
Fig. 1 is a schematic perspective structure view of a stator punching sheet according to an embodiment of the present application;
fig. 2 is a first structural schematic diagram of a stator punching sheet according to an embodiment of the present application;
fig. 3 is a second structural schematic diagram of a stator punching sheet according to an embodiment of the present application;
fig. 4 is a third structural schematic diagram of a stator punching sheet according to an embodiment of the present application;
fig. 5 is a schematic perspective view of a stator core according to an embodiment of the present application;
FIG. 6 is a structural dimension diagram of the stator core and the rotor of the motor according to the embodiment of the present application;
FIG. 7 is a graph comparing cogging torque for a permanent magnet machine of an embodiment of the present application with a prior art machine;
FIG. 8 is a graph comparing output torque of a permanent magnet machine according to an embodiment of the present application with that of a prior art machine;
fig. 9 is a schematic diagram of a matching structure of a motor rotor and a stator assembly of a permanent magnet motor according to an embodiment of the present application at different rotational positions.
The reference numerals are represented as:
1. a yoke portion; 2. a tooth portion; 3. a tooth boot; 4. an auxiliary groove; 5. a rotor of an electric machine.
Detailed Description
With combined reference to fig. 1 to 9, according to an embodiment of the present application, a stator lamination includes a yoke portion 1, tooth portions 2 and tooth shoes 3 disposed on one side of the tooth portions 2 away from the yoke portion 1, the tooth portions 2 are uniformly distributed along a circumferential direction of the yoke portion 1, at least a portion of inner circumferential walls of the tooth shoes 3 are provided with auxiliary grooves 4, and inner circumferential walls of at least two adjacent tooth shoes 3 have different structures.
When the stator core is formed by the stator punching sheet, the stator punching sheet can rotate for an angle along the same direction in the laminating process, so that the finally formed stator core can have the effect of a stator chute, meanwhile, because the auxiliary grooves 4 are arranged on at least part of the inner peripheral walls of the tooth shoes 3 and the structures of the inner peripheral walls of at least two adjacent tooth shoes 3 are different, the auxiliary grooves 4 can also rotate along with the stator punching sheet in the rotating process of the stator punching sheet, only one punching sheet is needed to form the auxiliary grooves 4 on each tooth shoe 3 of the finally formed stator core, the auxiliary grooves 4 on the same axis of the inner peripheral wall of the stator core and the adjacent auxiliary grooves 4 are of different structures, the process is simpler, the tooth harmonic order can be improved by utilizing the auxiliary grooves 4, and the stator chute can be formed by utilizing the stator punching sheet, the stator core finally formed can be combined with the inclined slots 4 by utilizing the auxiliary slots 4 on the stator punching sheet, and torque pulsation is effectively reduced.
The inner peripheral walls of at least two adjacent tooth boots 3 are provided with auxiliary grooves 4, and the structures of the auxiliary grooves 4 on the inner peripheral walls of the two adjacent tooth boots 3 are the same.
Specifically, in one of the embodiments, the auxiliary grooves 4 on the inner peripheral walls of two adjacent tooth shoes 3 are identical in structure and different in number. For example, there may be one auxiliary groove 4 on the first tooth shoe 3, two auxiliary grooves 4 on the other tooth shoe 3, or three auxiliary grooves 4. In the auxiliary grooves 4 of the other tooth shoe 3, there may be one auxiliary groove 4 in the same position on the tooth shoe as the auxiliary groove 4 on the first tooth shoe 3, or all auxiliary grooves 4 may be in different positions on the tooth shoe than the auxiliary grooves 4 on the first tooth shoe 3.
In another embodiment, the auxiliary grooves 4 on the inner circumferential walls of two adjacent tooth shoes 3 are identical in structure and number, and at least a part of the auxiliary grooves 4 are different in position. For example, on the first tooth shoe 3, an auxiliary groove 4 is provided, which auxiliary groove 4 is located on the left side of the tooth shoe 3, and on the second tooth shoe 3, an auxiliary groove 4 is also provided, which auxiliary groove 4 is located on the right side or in the middle of the second tooth shoe 3.
In another embodiment not shown in the figures, the inner circumferential walls of at least two adjacent tooth shoes 3 are provided with auxiliary grooves 4, and the structures of the auxiliary grooves 4 on the inner circumferential walls of two adjacent tooth shoes 3 are different.
The number of the tooth shoes 3 of the stator punching sheet is z, and 2n≤z＜2n+1One of the tooth shoes 3 is used as a starting tooth shoe 3, the auxiliary groove 4 is not arranged on the starting tooth shoe 3, and the starting tooth shoe 3 is used as a starting tooth shoe in the rotation direction of the motor rotor 5 in the continuous 2n1 auxiliary grooves 4 are provided in each tooth shoe 3, and the number or position of the auxiliary grooves 4 in at least two adjacent tooth shoes 3 is different, so that the adjacent tooth shoes 3 form different tooth shoe structures. For example, when the number of the tooth shoes 3 of the stator punching sheet is 6, then 22≤z＜22+1Therefore, the auxiliary groove 4 is not provided in the starting tooth shoe 3, and the auxiliary groove 4 is provided in each of the 4-1-3 consecutive tooth shoes 3 along the rotation direction of the motor rotor 5 from the starting tooth shoe 3, and the fifth and sixth tooth shoes 3 are also configured in the same manner as the starting tooth shoe, that is, the auxiliary groove 4 is not provided in the tooth shoe 3.
Preferably, n is the total number of arrangement positions of the auxiliary groove 4 on the single tooth shoe 3, the arrangement position is marked as 1 when the auxiliary groove 4 is arranged at a certain arrangement position on the tooth shoe 3, and the arrangement position is marked as 0 when the auxiliary groove 4 is not arranged at a certain arrangement position, on any tooth shoe 3, along the tooth shoe 3The binary digits of the set positions of the rotation direction of the motor rotor 5 are arranged from low to high in 2n1, the arrangement positions of the auxiliary grooves 4 are arranged in a binary manner on each tooth shoe 3 in order from small to large. In this embodiment, the total number of the installation positions refers to the number of the installation positions of the auxiliary slots 4 on the tooth shoes after all the tooth shoes on the same stator punching sheet are overlapped, and when the number of the tooth shoes 3 of the stator punching sheet is determined, the number of the installation positions of the auxiliary slots 4 on the tooth shoes is also determined correspondingly.
Through the arrangement, the number of the slots on each tooth is sequentially increased along the rotation direction of the rotor in each section of iron core, the positions of the slots are sequentially deviated towards the rotation direction, and the magnitude and direction of electromagnetic force applied to each tooth are uniformly changed along the rotation direction, so that the frequency of sudden change of torque can be reduced, and the torque is more stable.
As shown in fig. 9, taking the stator tooth at 12 o' clock position as 1 as an example, the stator teeth are numbered 1 to 9 in the clockwise direction, and at the position 1, the stator teeth opposite to the rotor magnetic poles are 1, 4, and 7, and at this time, the number of the teeth is the largest by the electromagnetic force, and the total number of the auxiliary slots opened is 3. In position 3, the stator teeth with the rotor poles facing each other are 2, 5, 8, and the total number of auxiliary slots is 4. In position 2, the stator teeth facing the rotor poles are 3, 6, 9, and the total number of auxiliary slots is 5. Along with the rotation of the rotor, the position of the rotor periodically changes at the position 1, the position 2 and the position 3 in sequence, and the torque changes smoothly.
In this embodiment, the number of the tooth shoes 3 is 9, wherein the initial tooth shoe 3 and the last tooth shoe 3 are not provided with the auxiliary groove 4, and along the rotation direction of the motor rotor 5, the initial tooth shoe 3 is the first tooth shoe, the last tooth shoe 3 is the ninth tooth shoe, the binary number formed by the auxiliary groove 4 on the second tooth shoe is 001, the binary number formed by the auxiliary groove 4 on the third tooth shoe is 010, the binary number formed by the auxiliary groove 4 on the fourth tooth shoe is 011, the binary number formed by the auxiliary groove 4 on the fifth tooth shoe is 100, the binary number formed by the auxiliary groove 4 on the sixth tooth shoe is 101, the binary number formed by the auxiliary groove 4 on the seventh tooth shoe is 110, and the binary number formed by the auxiliary groove 4 on the eighth tooth shoe is 111.
The number of the auxiliary grooves 4 is three, and in a cross section perpendicular to the central axis of the stator punching sheet, when the auxiliary grooves 4 are arranged at the arrangement position with the lowest number of bits, an included angle between a connecting line of the center of the groove bottom of the auxiliary groove 4 and the center of the stator punching sheet and the central line of the tooth shoe 3 where the auxiliary groove 4 is located is b, and b is (1/5-1/3) × a; when the auxiliary groove 4 is arranged at the middle arrangement position, the auxiliary groove 4 is positioned on the central line of the tooth shoe 3 where the auxiliary groove is positioned; when the auxiliary groove 4 is arranged at the position with the highest number of positions, an included angle between a connecting line of the center of the groove bottom of the auxiliary groove 4 and the center of the stator punching sheet and the center line of the tooth shoe 3 where the auxiliary groove 4 is located is c, wherein c is (1/5-1/3) a, a is a tooth polar angle, and a is 360/z.
The number of the tooth shoes 3 is 9, three auxiliary grooves 4 are arranged on one tooth shoe 3, in a cross section perpendicular to the central axis of the stator punching sheet, the auxiliary grooves 4 on two sides in the circumferential direction are symmetrical about the central line of the tooth shoe 3, and the auxiliary groove 4 in the middle is positioned on the central line of the tooth shoe 3.
The width of the auxiliary groove 4 is 1.4mm and the depth is 0.7 mm.
The width of the auxiliary slot 4 is L2, the width of the stator slot opening is L1, wherein L2 is (1/3-4/3) × L1.
The section of the auxiliary groove 4 is semicircular, square or triangular.
According to an embodiment of the application, the stator core includes the above-mentioned stator lamination, a plurality of stator laminations are stacked to form an axial segment, the number of the stator laminations is zt, z is the number of tooth shoes of each stator lamination, t is the number of the stator laminations in each axial segment, t is a positive integer, starting from the second stator lamination axial segment, each stator lamination axial segment rotates by a tooth pole angle a relative to the previous stator lamination axial segment, wherein the tooth pole angle a is 360/z.
Specifically, in the present embodiment, the stator core has 9 teeth 2, 9 stator slots are formed between the teeth, the tooth polar angle is 40 °, the total axial height is 45mm, the stator core is divided into 9 segments, each segment is 5mm, each segment is rotated counterclockwise by 40 ° than the next segment, and the rotation direction of the motor rotor 5 is counterclockwise. Each section of iron core is formed by laminating a plurality of stator punching sheets with the diameter smaller than 1 mm. The 9 teeth are sequentially called as first teeth to ninth teeth in a counterclockwise direction, and an auxiliary groove 4 is formed on the inner wall of the tooth shoe 3 of the tooth portion. The auxiliary grooves 4 are sequentially called as a first auxiliary groove to a third auxiliary groove in a clockwise direction, the first auxiliary groove forms an anticlockwise included angle of 10 degrees with the center line of the tooth boot 3, the second auxiliary groove is overlapped with the center line of the tooth boot 3, and the third auxiliary groove forms a clockwise included angle of 10 degrees with the center line of the tooth boot 3. On each segmented iron core, the first tooth is not provided with an auxiliary groove, the second tooth is not provided with an auxiliary groove, the third tooth is provided with a third auxiliary groove, the fourth tooth is provided with a second auxiliary groove, the fifth tooth is provided with a second auxiliary groove, a third auxiliary groove, the sixth tooth is provided with a first auxiliary groove, the seventh tooth is provided with a first auxiliary groove, a third auxiliary groove, the eighth tooth is provided with a first auxiliary groove, a second auxiliary groove and a ninth tooth, and the first auxiliary groove, the second auxiliary groove and the third auxiliary groove are provided.
The axial sections forming the stator core are rotated 9 times, each axial section is rotated 40 degrees relative to the previous axial section, a whole circle can be rotated, so that the grooves of the axial sections are overlapped, but two adjacent axial sections are asymmetric relative to the adjacent surface, and therefore the stator core can achieve the effect of rotating the skewed slot.
According to an embodiment of the application, the permanent magnet motor comprises a stator core, and the stator core is the stator core.
The permanent magnet motor further comprises a motor rotor 5, the motor rotor 5 is arranged on the inner peripheral side of the stator core, an air gap is formed between the motor rotor 5 and the stator core, the thickness of the air gap is H1, the depth of the auxiliary groove 4 is H2, and H2 is (1/2-3/2) × H1.
Permanent-magnet machine still includes motor rotor 5, motor rotor 5 sets up in stator core's internal peripheral side to and form the air gap between the stator core, the thickness of air gap is 0.8mm, and stator core's notch width is 3.2 mm.
Referring to fig. 7 in combination, with the motor of the present application, the cogging torque is significantly reduced and the output torque quality is improved compared to the motor in the prior art.
Referring to fig. 8 in combination, with the motor of the present application, compared to the motor in the prior art, the torque ripple is reduced from 8.3% to 7.5%, which effectively reduces the torque ripple.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.
Claims (17)
1. The stator punching sheet is characterized by comprising a yoke portion (1), tooth portions (2) and tooth shoes (3) arranged on one side of the yoke portion (1) and far away from the tooth portions (2), wherein the tooth portions (2) are uniformly distributed in the circumferential direction of the yoke portion (1), auxiliary grooves (4) are formed in the inner circumferential wall of at least part of the tooth shoes (3), and the inner circumferential walls of at least two adjacent tooth shoes (3) are different in structure.
2. The stator punching sheet according to claim 1, wherein the auxiliary grooves (4) are formed in the inner circumferential walls of at least two adjacent tooth shoes (3), and the auxiliary grooves (4) in the inner circumferential walls of the two adjacent tooth shoes (3) are identical in structure.
3. The stator punching according to claim 2, characterized in that the number of auxiliary grooves (4) on the inner circumferential wall of two adjacent tooth shoes (3) is different.
4. The stator punching sheet according to claim 2, wherein the number of auxiliary grooves (4) on the inner circumferential wall of two adjacent tooth shoes (3) is the same, and the positions of at least some of the auxiliary grooves (4) are different.
5. The stator punching sheet according to claim 1, wherein the auxiliary grooves (4) are formed in the inner circumferential walls of at least two adjacent tooth shoes (3), and the structures of the auxiliary grooves (4) in the inner circumferential walls of the two adjacent tooth shoes (3) are different.
6. Stator lamination according to claim 2, characterized in that the number of tooth shoes (3) of the stator lamination is z, and 2n≤z＜2n+1One of the tooth shoes (3) is taken as an initial tooth shoe (3), the auxiliary groove (4) is not arranged on the initial tooth shoe (3), and the initial tooth shoe (3) is taken as a start to be arranged on the continuous tooth shoe (2) along the rotation direction of the motor rotor (5)n-1 tooth shoes (3) are provided with auxiliary grooves (4).
7. Stator lamination according to claim 6, wherein n is the total number of the arrangement positions of the auxiliary slots (4) on a single tooth shoe (3), the arrangement position is marked as 1 when the auxiliary slot (4) is arranged at a certain arrangement position on the tooth shoe (3), the arrangement position is marked as 0 when the auxiliary slot (4) is not arranged at a certain arrangement position, and the binary digits of the arrangement positions are arranged from low to high on any tooth shoe (3) along the rotation direction of the motor rotor (5) and are arranged in 2 consecutive rowsn-1 tooth shoes (3), wherein the arrangement positions of the auxiliary grooves (4) are arranged on each tooth shoe (3) in a binary manner in the order from small to large.
8. Stator lamination according to claim 7, characterized in that the number of tooth shoes (3) is 9, wherein the initial tooth shoe (3) and the final tooth shoe (3) are not provided with an auxiliary groove (4) along the rotation direction of the motor rotor (5), the initial tooth shoe (3) is taken as a first tooth shoe, the last tooth shoe (3) is taken as a ninth tooth shoe, the binary number formed by the auxiliary groove (4) on the second tooth shoe is 001, the binary number formed by the auxiliary groove (4) on the third tooth shoe is 010, the binary number formed by the auxiliary groove (4) on the fourth tooth shoe is 011, the binary number formed by the auxiliary groove (4) on the fifth tooth shoe is 100, the binary number formed by the auxiliary groove (4) on the sixth tooth shoe is 101, the binary number formed by the auxiliary groove (4) on the seventh tooth shoe is 110, and the binary number formed by the auxiliary groove (4) on the eighth tooth shoe is 111.
9. The stator punching sheet according to claim 8, wherein the number of the auxiliary grooves (4) is three, and in a cross section perpendicular to the central axis of the stator punching sheet, when the auxiliary groove (4) is arranged at the arrangement position with the lowest position number, an included angle between a connecting line of the center of the groove bottom of the auxiliary groove (4) and the center of the stator punching sheet and a central line of a tooth shoe (3) where the auxiliary groove (4) is located is b, b is (1/5-1/3) a; when the auxiliary groove (4) is arranged at the middle arrangement position, the auxiliary groove (4) is positioned on the central line of the tooth shoe (3) where the auxiliary groove is positioned; when the auxiliary groove (4) is arranged at the position with the highest number of positions, an included angle between a connecting line of the center of the groove bottom of the auxiliary groove (4) and the center of the stator punching sheet and the center line of the tooth shoe (3) where the auxiliary groove (4) is located is c, wherein c is (1/5-1/3) a, a is a tooth pole angle, and a is 360/z.
10. The stator punching according to claim 2, characterized in that the number of the tooth shoes (3) is 9, three auxiliary grooves (4) are provided on one of the tooth shoes (3), the auxiliary grooves (4) on both sides in the circumferential direction are symmetrical with respect to the center line of the tooth shoe (3) in a cross section perpendicular to the central axis of the stator punching, and the auxiliary groove (4) in the middle is located on the center line of the tooth shoe (3).
11. Stator punching according to any of claims 1-10, characterized in that the auxiliary slot (4) has a width of 1.4mm and a depth of 0.7 mm.
12. The stator punching sheet according to any one of claims 1 to 10, wherein the width of the auxiliary slot (4) is L2, the stator slot opening width is L1, and L2 is (1/3-4/3) × L1.
13. Stator punching according to any one of claims 1 to 10, characterized in that the cross section of the auxiliary slot (4) is semicircular, square or triangular.
14. A stator core comprising the stator laminations of any one of claims 1 to 11, a plurality of the stator laminations being stacked in axial segments, the number of the stator laminations being zt, z being the number of tooth shoes of each stator lamination, t being the number of stator laminations in each axial segment, t being a positive integer, each stator lamination axial segment being rotated relative to a preceding stator lamination axial segment by a tooth pole angle a starting from a second stator lamination axial segment, wherein the tooth pole angle a is 360/z.
15. A permanent magnet electrical machine comprising a stator core, wherein the stator core is according to any one of claims 1 to 14.
16. The permanent magnet motor according to claim 15, further comprising a motor rotor (5), wherein the motor rotor (5) is disposed on an inner peripheral side of the stator core and forms an air gap with the stator core, the air gap has a thickness of H1, and the auxiliary slots (4) have a depth of H2, wherein H2 (1/2-3/2) H1.
17. The permanent magnet motor according to claim 15, further comprising a motor rotor (5), wherein the motor rotor (5) is disposed on the inner peripheral side of the stator core and forms an air gap with the stator core, the thickness of the air gap is 0.8mm, and the width of the notch of the stator core is 3.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921992212.7U CN210898658U (en) | 2019-11-18 | 2019-11-18 | Stator punching sheet, stator core and permanent magnet motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921992212.7U CN210898658U (en) | 2019-11-18 | 2019-11-18 | Stator punching sheet, stator core and permanent magnet motor |
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| Publication Number | Publication Date |
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| CN210898658U true CN210898658U (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921992212.7U Active CN210898658U (en) | 2019-11-18 | 2019-11-18 | Stator punching sheet, stator core and permanent magnet motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024012150A1 (en) * | 2022-07-13 | 2024-01-18 | 美的威灵电机技术（上海）有限公司 | Stator assembly, electric motor, and servo system |
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2019
- 2019-11-18 CN CN201921992212.7U patent/CN210898658U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024012150A1 (en) * | 2022-07-13 | 2024-01-18 | 美的威灵电机技术（上海）有限公司 | Stator assembly, electric motor, and servo system |
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