Stator core, stator assembly, motor, suspension system and vehicle

Abstract

The invention relates to a stator core, a stator assembly, a motor, a suspension system and a vehicle. The stator core comprises a plurality of stator teeth distributed along the axial direction of the stator core, and stator slots are formed among the plurality of stator teeth. Each stator slot comprises a slot main body part and a slot opening part which are arranged along the radial direction of the stator iron core. The slot body portion has a first central axis, and the slot opening portion has a second central axis. The second central axis of the stator slot is parallel to the first central axis, and the offset distance of the second central axis along the axial direction of the stator core relative to the first central axis is P. The size of the slot main body part along the axial direction of the stator core is W1. P and W1 satisfy the formula 0 < P / W1 < = 0.09. By means of the arrangement, thrust fluctuation caused by magnetic resistance when the motor works is reduced, and then vibration and noise generated when the motor works are reduced.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a stator core, a stator assembly, a motor, a suspension system, and a vehicle. Background Art

[0002] Linear motors are a recently developed direct-drive technology. Due to their outstanding advantages, such as zero transmission chain, contactless operation, zero backlash, high stiffness, and fast response, linear motors are gradually replacing indirect servo mechanisms such as servo motors and ball screws, becoming a core functional component in high-speed, precision, and high-end equipment. However, linear motors currently generate vibration and noise during operation. Summary of the Invention

[0003] Embodiments of the present application provide a stator core, a stator assembly, a motor, a suspension system, and a vehicle, which reduce vibration and noise generated when the motor is operating, so as to at least partially solve the above-mentioned technical problems.

[0004] In order to achieve the above-mentioned object, according to a first aspect of the present application, a stator core is provided, comprising:

[0005] A plurality of stator teeth are distributed along the axial direction of the stator core, and stator slots are formed between the plurality of stator teeth; the stator slots include a slot body portion and a slot opening portion arranged along the radial direction of the stator core, the slot body portion has a first central axis, and the slot opening portion has a second central axis;

[0006] In which, the second center axis of the stator slot is parallel to the first center axis and is offset by a distance P relative to the first center axis along the axial direction of the stator core. The size of the slot main body along the axial direction of the stator core is W1; P and W1 satisfy the formula 0<P / W1≤0.09.

[0007] Optionally, 0.06≤P / W1≤0.08.

[0008] Optionally, in the axial direction of the stator core, the stator core has a first end and a second end relative to each other; the plurality of stator slots include a first stator slot; in the axial direction of the stator core, the second center axis of the first stator slot is offset relative to the first center axis toward one of the first end and the second end.

[0009] Optionally, the stator core further includes a first tooth shoe portion, the first tooth shoe portion being connected to an end portion of the stator tooth, and extending toward one of the first end and the second end along the axial direction of the stator core.

[0010] Optionally, the stator core further includes: a second tooth shoe portion, which is connected to the end of the stator tooth and extends along the axial direction of the stator core, and the extension direction of the second tooth shoe portion is opposite to the extension direction of the first tooth shoe portion; wherein, in the axial direction of the stator core, the size of the second tooth shoe portion is smaller than the size of the first tooth shoe portion.

[0011] Optionally, a plurality of the first stator slots are adjacently arranged along the axial direction of the stator core and form a first stator slot group; and a plurality of the first stator slot groups are arranged around the stator center axis of the stator core.

[0012] Optionally, the plurality of stator slots further include a second stator slot, and in the axial direction of the stator core, the second central axis of the second stator slot is offset relative to the first central axis toward the other of the first end and the second end.

[0013] Optionally, along the axial direction of the stator core, multiple first stator slots are arranged adjacent to each other and form a first stator slot group, and multiple second stator slots are arranged adjacent to each other and form a second stator slot group; the first stator slot group and the second stator slot group are arranged around the stator center axis of the stator core.

[0014] Optionally, in the axial direction of the stator core, the first stator slot and the second stator slot are arranged adjacent to each other.

[0015] Optionally, the stator core further includes: a third tooth shoe portion, the third tooth shoe portion is connected to the end portion of the stator tooth, and the third tooth shoe portion extends in the axial direction of the stator core toward the other of the first end and the second end.

[0016] Optionally, the stator core further includes: a first tooth shoe portion extending toward one of the first end and the second end; wherein the first tooth shoe portion and the third tooth shoe portion are connected to opposite sides of an end portion of one of the stator teeth.

[0017] Optionally, the stator core further includes: a tooth shoe portion connected to one end of the stator tooth and extending along the axial direction of the stator core; the radial dimension of the tooth shoe portion along the stator core is D1; wherein D1 and W1 satisfy the formula 0<D1 / W1≤0.25.

[0018] Optionally, 0.1≤D1 / W1≤0.25.

[0019] Optionally, in the axial direction of the stator core, the size of the stator core is a, and the number of the stator slots is c; a, W1, c and d satisfy the formula W1=ad / c, and the value of d is 0.3~0.7.

[0020] Optionally, a dimension of the slot opening of the stator slot along the axial direction of the stator core is W2; wherein W2 and W1 satisfy the formula 0.85≤W2 / W1≤0.95.

[0021] According to a second aspect of the present application, a stator assembly is provided, comprising the above-mentioned stator core and an armature winding, wherein the armature winding is arranged in a plurality of the stator slots.

[0022] According to a third aspect of the present application, there is provided a motor, comprising:

[0023] The stator assembly described above; and

[0024] The mover assembly moves relative to the stator assembly.

[0025] According to a fourth aspect of the present application, a suspension system is provided, comprising the motor as described above.

[0026] According to a fifth aspect of the present application, a vehicle is provided, comprising the above-mentioned suspension system.

[0027] In the stator core of the embodiment of the present application, the ratio of the offset distance P of the second center axis of the slot portion relative to the first center axis of the slot body portion along the axial direction of the stator core to the axial dimension W1 of the slot body portion along the stator core is optimized to reduce the thrust fluctuation caused by the magnetic resistance when the motor is working, thereby reducing the vibration and noise generated when the motor is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0029] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0030] Figure 1 A schematic diagram of a partial structure of a motor according to some embodiments of the present application;

[0031] Figure 2 Schematic diagram of a partial structure of a motor according to some embodiments of the related art;

[0032] Figure 3 for Figure 1 The test results of the relationship between the ratio of the offset distance P to the axial dimension W1 of the slot body along the stator core and the peak value of the magnetic reluctance force in the motor shown in FIG. Figure 2The test results of the peak magnetic resistance of the motor shown are as follows: Figure 2 The test results of the motor shown, the optimized curve corresponds to Figure 1 Test results for the motor shown;

[0033] Figure 4 for Figure 1 and Figure 2 The test results of the magnetic resistance of the motor shown in the figure are as follows: Figure 2 The test results of the motor shown, the optimized curve corresponds to Figure 1 Test results for the motor shown;

[0034] Figure 5 for Figure 1 and Figure 2 The test results of the motor thrust of the motor shown in FIG. 1 , where the curve before optimization corresponds to Figure 2 The test results of the motor shown, the optimized curve corresponds to Figure 1 Test results for the motor shown;

[0035] Figure 6 for Figure 1 and Figure 2 The test results of the motor thrust harmonic content of the motor shown in the figure are as follows: Figure 2 The test results of the motor shown, the optimized cylinder corresponds to Figure 1 Test results for the motor shown;

[0036] Figure 7 Schematic diagram of the partial structure of motors according to other embodiments of the present application;

[0037] Figure 8 Schematic diagram of the partial structure of motors according to some other embodiments provided in this application;

[0038] Figure 9 A partial schematic diagram of a motor according to some other embodiments of the present application;

[0039] Figure 10 for Figure 2 and Figure 8 The test results of the magnetic resistance of the motor shown in the figure are as follows: Figure 2 The test results of the motor shown, the optimized curve corresponds to Figure 8 Test results for the motor shown;

[0040] Figure 11 A partial schematic diagram of a motor according to some other embodiments of the present application;

[0041] Figure 12 for Figure 2 and Figure 11 The test results of the magnetic resistance of the motor shown in the figure are as follows: Figure 2 The test results of the motor shown, the optimized curve corresponds to Figure 11 Test results for the motor shown;

[0042] Figure 13 A partial schematic diagram of a motor according to some other embodiments of the present application;

[0043] Figure 14 for Figure 2 and Figure 13 The test results of the magnetic resistance of the motor shown in the figure are as follows: Figure 2 The test results of the motor shown, the optimized curve corresponds to Figure 13 Test results for the motor shown;

[0044] Figure 15 for Figure 7 、 Figure 9 as well as Figure 13 The test results of the influence of the motor's offset direction on the magnetic resistance are shown. The curves of left offset, right offset, and left and right offset correspond to Figure 9 、 Figure 7 as well as Figure 13 Test results for the motor shown;

[0045] Figure 16 for Figure 1 The test results of the relationship between the ratio of the radial dimension D1 of the tooth shoe along the stator core to the axial dimension W1 of the slot body along the stator core and the peak value of the magnetic resistance force are shown as well as Figure 2 The test results of the peak magnetic resistance of the motor shown; the straight line before optimization corresponds to Figure 2 The test results of the motor shown, the optimized curve corresponds to Figure 1 Test results for the motor shown;

[0046] Figure 17 A structural block diagram of a suspension system according to some embodiments of the present application;

[0047] Figure 18 A structural block diagram of a vehicle according to some embodiments of the present application.

[0048] Description of reference numerals:

[0049] 100, 101, motor; 200, suspension system; 300, vehicle;

[0050] 1. Stator assembly;

[0051] 11. stator core; 11A. stator center axis; 11B. first end; 11C. second end;

[0052] 111, axial connection portion;

[0053] 112, stator teeth; 1121, end stator teeth; 1122, middle stator teeth;

[0054] 113, 3, stator slot; 1131, slot body; O1, first central axis; 1132, slot opening; O2, second central axis; 113A, first stator slot; 113Z1, first stator slot group; 113B, second stator slot; 113Z2, second stator slot group; 113Z3, third stator slot group;

[0055] 114, tooth boot; 114A, first tooth boot; 114B, second tooth boot; 114C, third tooth boot;

[0056] 12. Armature winding;

[0057] 2. Mover assembly; 21. Magnet; 22. Housing. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0059] According to the first aspect of this application, referring to Figure 1 As shown, some embodiments of the present application provide a stator core 11 .

[0060] The stator core 11 includes a plurality of stator teeth 112 distributed axially along the stator core 11. Stator slots 113 are formed between the plurality of stator teeth 112. Each stator slot 113 is located between two adjacent stator teeth 112 and includes a slot opening 1132 and a slot body 1131 arranged radially along the stator core 11. The slot opening 1132 is located at the slot opening of the stator slot 113. The slot body 1131 has a first central axis O1, and the slot opening 1132 has a second central axis O2. The first and second central axes O1 and O2 extend radially along the stator core 11. The second central axis O2 of the stator slot 113 is parallel to the first central axis O1 and is offset from the first central axis O1 by a distance P in the axial direction of the stator core 11. The slot body 1131 has a dimension W1 in the axial direction of the stator core 11. P and W1 satisfy the equation 0<P / W1≤0.09. With this arrangement, the second center axis O2 of the slot opening 1132 of the stator slot 113 is offset axially along the stator core 11 relative to the first center axis O1 of the slot body 1131. This can improve the cogging effect of the motor 100 and reduce the motor's reluctance force. On this basis, the value of P / W1 is optimized so that the phase angle formed by the offset can offset the cogging force harmonics between the slots, further weakening the cogging effect and thereby reducing the thrust fluctuations caused by the reluctance force of the motor 100, thereby reducing the vibration and noise generated by the motor. At the same time, the harmonic content in the motor thrust is reduced and the motor thrust of the motor 100 is increased, thereby improving the problem of large motor thrust fluctuations and further reducing the vibration and noise generated by the motor.

[0061] It should be noted that, in the related art, Figure 2 The stator slots 3 shown have a single central axis. This design results in an uneven magnetic circuit in motor 101, causing the magnitude and direction of the resultant primary and secondary forces to vary at different locations. This cogging effect increases thrust fluctuations and magnetic drag in motor 101. This uneven thrust has a negative impact on motion systems requiring low-speed operation and rapid, precise positioning.

[0062] Regarding the problems in the related art, in some embodiments of the present application, on the basis that the second center axis O2 of the slot mouth portion 1132 of the stator slot 113 is parallel to the first center axis O1 of the slot body portion 1131 and is axially offset relative to the first center axis O1 along the stator core 11, the value of P / W1 is further optimized, the slot effect of the motor 100 is further improved, the magnetic resistance of the motor 100 is reduced, and the problem of large thrust fluctuations of the motor is improved, thereby improving the performance of the motor 100 in low-speed operation and fast and precise positioning.

[0063] In some embodiments, 0.06≤P / W1≤0.08. With this configuration, the value of P / W1 is further optimized to further reduce the magnetic resistance of the motor 100 and further reduce the vibration and noise generated by the motor.

[0064] Optionally, the value of P / W1 may be 0.01-0.08, 0.02-0.085, 0.03-0.075, or 0.065-0.075.

[0065] It is understood that P / W1 can take any value greater than 0 and less than or equal to 0.09. For example, P / W1 can be 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08 or 0.09.

[0066] In some embodiments, the stator core 11 further includes an axial connection portion 111 extending axially of the stator core 11. A plurality of stator teeth 112 are connected to the axial connection portion 111. In the radial direction of the stator core 11, the slot body portion 1131 is located between the slot opening portion 1132 and the axial connection portion 111.

[0067] The axial connecting portion 111 is annular. In some embodiments, the axial connecting portion 111 can be a circular cylinder, but is not limited thereto. The axial connecting portion 111 can be designed in sections or in one piece.

[0068] In some embodiments, reference Figure 1 、 Figures 7 and 8 As shown, in the axial direction of the stator core 11, the stator core 11 has a first end 11B and a second end 11C opposite to each other. The plurality of stator slots 113 include a first stator slot 113A. In the axial direction of the stator core 11, the second center axis O2 of the first stator slot 113A is offset relative to the first center axis O1 toward one of the first end 11B and the second end 11C. By setting the first stator slot 113A in this way, the second center axis O2 of the slot opening portion 1132 is offset relative to the first center axis O1 of the slot body portion 1131 toward one of the first end 11B and the second end 11C, thereby offsetting the cogging force harmonics in the inter-slot portion and weakening the cogging effect, thereby reducing the cogging force component of the magnetic drag of the motor 100, reducing the magnetic drag of the motor, and improving the problem of large thrust fluctuations in the motor, thereby improving the performance of the motor.

[0069] For example, referring to Figure 1 、 Figures 7 and 8 As shown, the second center axis O2 of the first stator slot 113A is offset relative to the first center axis O1 toward the first end 11B.

[0070] In some embodiments, reference Figure 1、 Figures 7 to 9 、 Figure 11 as well as Figure 13 As shown, the stator core 11 further includes a tooth shoe 114. The tooth shoe 114 is connected to one end of the stator tooth 112 and extends axially along the stator core 11. In the axial direction of the stator core 11, the tooth shoe 114 is located between the slot opening 1132 and one end of the stator tooth 112. This arrangement, by adding the tooth shoe 114 connected to one end of the stator tooth 112 at the slot opening 1132, causes the second central axis O2 of the slot opening 1132 of the stator slot 113 to be offset in the axial direction of the stator core 11 relative to the first central axis O1 of the slot body 1131.

[0071] In some embodiments, the tooth shoe 114 may be integral with the stator tooth 112 to simplify the manufacturing process of the stator core 11. In other embodiments, the tooth shoe 114 may be detachably connected to the stator tooth 112.

[0072] It should be noted that when the winding coil is arranged in the stator slot 113 , the tooth shoe portion 114 limits the winding coil in the radial direction of the stator core 11 to prevent the coil from loosening.

[0073] In some embodiments, reference Figure 1 、 Figures 7 and 8 As shown, the tooth shoe 114 includes a first tooth shoe 114A. The first tooth shoe 114A is connected to the end of the stator tooth 112 and extends toward one of the first end 11B and the second end 11C. Along the axial direction of the stator core 11, the first tooth shoe 114A is located between the end of the stator tooth 112 and the slot opening 1132 of the first stator slot 113A. With this arrangement, the first tooth shoe 114A forms the first stator slot 113A.

[0074] In some embodiments, reference Figure 8 As shown, when the tooth shoe portion 114 includes a first tooth shoe portion 114A, the tooth shoe portion 114 may further include a second tooth shoe portion 114B, which is connected to the end of the stator tooth 112 and extends in the axial direction of the stator core 11. The extension direction of the second tooth shoe portion 114B is opposite to the extension direction of the first tooth shoe portion 114A. Along the axial direction of the stator core 11, the notch portion 1132 of the first stator slot 113A is located between the first tooth shoe portion 114A and the second tooth shoe portion 114B. In the axial direction of the stator core 11, the size of the second tooth shoe portion 114B is smaller than the size of the first tooth shoe portion 114A. In this way, the first stator slot 113A is formed by providing the first tooth shoe portion 114A and the second tooth shoe portion 114B with opposite extension directions, and the sizes of the two in the axial direction of the stator core 11 are different.

[0075] In some embodiments, the second tooth shoe 114B and the first tooth shoe 114A may be connected to opposite sides of one end of the stator tooth 112. The second tooth shoe 114B and the first tooth shoe 114A connected to two adjacent stator teeth 112 define a slot opening 1132 of the first stator slot 113A.

[0076] In some embodiments, reference Figure 7 and Figure 8 As shown, multiple first stator slots 113A are adjacently arranged along the axial direction of the stator core 11 and form a first stator slot group 113Z1. These multiple first stator slot groups 113Z1 are arranged circumferentially around the stator core 11 and around the stator center axis 11A of the stator core 11. This arrangement reduces vibration and noise generated by the motor while simplifying the manufacturing process of the stator core 11.

[0077] In some embodiments, reference Figure 9 As shown, in the axial direction of the stator core 11, the stator core 11 has a first end 11B and a second end 11C that are opposite to each other. The plurality of stator slots 113 include a second stator slot 113B. In the axial direction of the stator core 11, the second center axis O2 of the first stator slot 113A is offset relative to the first center axis O1 toward the other of the first end 11B and the second end 11C. By providing the second stator slot 113B, the second center axis O2 of the slot opening 1132 is offset relative to the first center axis O1 of the slot body 1131 toward the other of the first end 11B and the second end 11C, thereby offsetting the cogging force harmonics in the inter-slot portion and weakening the cogging effect, thereby reducing the cogging force component of the magnetic drag of the motor 100, reducing the magnetic drag of the motor, and improving the problem of large thrust fluctuations in the motor, thereby reducing the vibration and noise generated by the motor.

[0078] For example, referring to Figure 9 As shown, the second center axis O2 of the second stator slot 113B is offset relative to the first center axis O1 toward the second end 11C.

[0079] In some embodiments, multiple second stator slots 113B are adjacently arranged along the axial direction of the stator core 11 and form a second stator slot group 113Z2. Multiple second stator slot groups 113Z2 are arranged along the circumference of the stator core 11 and are arranged around the stator center axis 11A of the stator core 11. This arrangement reduces vibration and noise generated by the motor while simplifying the manufacturing process of the stator core 11.

[0080] In some embodiments, reference Figure 11 and Figure 13As shown, the plurality of stator slots 113 may include a first stator slot 113A and a second stator slot 113B. The second center axis O2 of the first stator slot 113A is offset relative to the first center axis O1 toward one of the first end 11B and the second end 11C. The second center axis O2 of the second stator slot 113B is offset relative to the first center axis O1 toward the other of the first end 11B and the second end 11C. With this arrangement, the first stator slot 113A cooperates with the second stator slot 113B, making it easier to change the phase angle of the cogging force between different slots, making it easier for the cogging forces between different slots to offset each other, thereby better weakening the cogging effect, better reducing the magnetic drag force, and improving the problem of large fluctuations in the driving force, thereby better reducing the vibration and noise generated by the motor.

[0081] In some embodiments, reference Figure 11 As shown, along the axial direction of the stator core 11, a plurality of first stator slots 113A are adjacently arranged to form a first stator slot group 113Z1. Along the axial direction of the stator core 11, a plurality of second stator slots 113B are adjacently arranged to form a second stator slot group 113Z2. The first stator slot group 113Z1 and the second stator slot group 113Z2 are arranged along the circumference of the stator core 11 and are arranged around the stator center axis 11A of the stator core 11. This arrangement allows the second stator slot group 113Z2 to complement the first stator slot group 113Z1, effectively reducing vibration and noise generated by the motor while simplifying the manufacturing process of the stator core 11.

[0082] In some embodiments, the first stator slot groups 113Z1 and the second stator slot groups 113Z2 may be alternately arranged in the circumferential direction of the stator core 11. In other embodiments, the first stator slot groups 113Z1 and the second stator slot groups 113Z2 may be symmetrically arranged in the radial direction of the stator core 11.

[0083] In some embodiments, reference Figure 13 As shown, first stator slots 113A and second stator slots 113B are arranged adjacent to each other in the axial direction of stator core 11. This arrangement cancels out the cogging forces between axially adjacent first stator slots 113A and second stator slots 113B, thereby further reducing the cogging effect, lowering the magnetic drag of motor 100 and addressing the problem of large driving force fluctuations, thereby further reducing vibration and noise generated by the motor.

[0084] In some embodiments, in the axial direction of the stator core 11, the plurality of first stator slots 113A and the plurality of second stator slots 113B form a third stator slot group 113Z3. The plurality of third stator slot groups 113Z3 are arranged along the circumference of the stator core 11 and are disposed around the stator center axis 11A of the stator core 11. This arrangement can further improve the reduction of cogging, reduce the magnetic drag of the motor 100, and alleviate the problem of large driving force fluctuations, thereby further reducing the vibration and noise generated by the motor.

[0085] In some embodiments, reference Figure 9 、 Figure 11 as well as Figure 13 As shown, the tooth shoe 114 further includes a third tooth shoe 114C. The third tooth shoe 114C is connected to the end of the stator tooth 112 and extends toward the other of the first end 11B and the second end 11C. Along the axial direction of the stator core 11, the third tooth shoe 114C is located between the end of the stator tooth 112 and the slot opening 1132 of the second stator slot 113B. With this arrangement, the second stator slot 113B is formed by providing the third tooth shoe 114C.

[0086] In some embodiments, reference Figure 13 As shown, when the tooth shoe 114 includes a first tooth shoe 114A and a third tooth shoe 114C, the first tooth shoe 114A and the third tooth shoe 114C are connected to opposite sides of the end of a stator tooth 112. In this configuration, the first tooth shoe 114A and the third tooth shoe 114C are connected to opposite sides of the end of a stator tooth 112, respectively, to simultaneously form a first stator slot 113A and a second stator slot 113B.

[0087] In some embodiments, when the first tooth shoe 114A and the third tooth shoe 114C are connected to opposite sides of the end of a stator tooth 112, the stator teeth 112 and the stator teeth 112 that connect the first tooth shoe 114A and the third tooth shoe 114C are alternately arranged in the axial direction of the stator core 11. This arrangement forms first stator slots 113A and second stator slots 113B that are alternately arranged in the axial direction of the stator core 11.

[0088] In some embodiments, reference Figure 1 As shown, along the axial direction of the stator core 11, the length of the stator core 11 is a, and the number of stator slots 113 is c. a, W1, c, and d satisfy the formula W1 = ad / c, with d ranging from 0.3 to 0.7. This arrangement reduces the magnetic drag of the motor 100.

[0089] Optionally, the value of d is 0.4 to 0.6. Exemplarily, the value of d is 0.3, 0.4, 0.5, 0.6 or 0.7.

[0090] For example, Figure 1 FIG. 1 only illustrates the number c of the stator slots 113 as 9, but is not limited thereto.

[0091] In some embodiments, the stator core 11 is annular, and the stator slots 113 have a radial dimension H along the stator core 11. The outer diameter of the stator core 11 is R, and the inner diameter of the stator core 11 is r. H, R, and r satisfy H = (Rr)f, where f is 0.65 to 0.85. This configuration ensures that the stator slots 113 are appropriately sized, improving the performance of the motor 100.

[0092] In some embodiments, reference Figure 1 As shown, the dimension of the slot portion 1132 along the axial direction of the stator core 11 is W2, and W2 and W1 satisfy the formula 0.85≤W2 / W1≤0.95. This arrangement ensures an appropriate ratio between the dimension W2 of the slot portion 1132 along the axial direction of the stator core 11 and the dimension W1 of the slot body portion 1131 along the axial direction of the stator core 11. This reduces the magnetic drag of the motor 100 and improves thrust ripple, while facilitating installation of the armature winding 12.

[0093] Optionally, 0.82≤W2 / W1≤0.92.

[0094] It is understood that the value of W2 / W1 can be any value between 0.85 and 0.95. For example, W2 / W1 can be 0.85, 0.88, 0.9, 0.92, 0.94 or 0.95.

[0095] In some embodiments, reference Figure 1 As shown, the radial dimension of the tooth shoe 114 along the stator core 11 is D1. D1 and W1 satisfy the equation 0 < D1 / W1 ≤ 0.25. This configuration optimizes the ratio of the radial dimension of the tooth shoe 114 along the stator core 11 to the axial dimension of the slot body 1131 along the stator core 11, further offsetting some of the cogging force harmonics and reducing the magnetic drag force during operation of the motor 100.

[0096] In some embodiments, 0.1≤D1 / W1≤0.25. This configuration simplifies the manufacturing difficulty of the tooth shoe portion 114 and significantly reduces the magnetic resistance of the motor 100 during operation.

[0097] Optionally, the value of D1 / W1 is 0.12-0.22 or 0.01-0.24.

[0098] It is understood that the value of D1 / W1 can be any value greater than 0 and less than or equal to 0.25. For example, the value of D1 / W1 can be 0.02, 0.04, 0.06, 0.08, 0.1, 0.12, 0.14, 0.16, 0.18, 0.2, 0.22, 0.23 or 0.25.

[0099] In some embodiments, reference Figure 1 As shown, the multiple stator teeth 112 distributed along the axial direction of the stator core 11 include two end stator teeth 1121 and a plurality of intermediate stator teeth 1122, and the plurality of intermediate stator teeth 1122 are located between the two end stator teeth 1121. In the axial direction of the stator core 11, the end stator teeth 1121 are respectively located at both ends of the stator core 11. In the axial direction of the stator core 11, the size of at least one end stator tooth 1121 is different from the size of the intermediate stator teeth 1122. With such a configuration, the size of the end stator teeth 1121 can be adjusted to adjust the size of the stator core 11 in its axial direction, thereby offsetting the end force harmonics at both ends of the motor 100, reducing the edge effect, and further weakening the edge force component in the magnetic resistance, thereby further reducing the magnetic resistance.

[0100] In some embodiments, in the axial direction of the stator core 11, the size of at least one end stator tooth 1121 can be larger than the size of the middle stator tooth 1122. In some embodiments, in the axial direction of the stator core 11, the size of at least one end stator tooth 1121 can also be smaller than the size of the middle stator tooth 1122. In some embodiments, in the axial direction of the stator core 11, the sizes of the two end stator teeth 1121 can be the same or different.

[0101] According to the second aspect of this application, referring to Figure 1 、 Figures 7 to 9 、 Figure 11 as well as Figure 13 An embodiment of the present application provides a stator assembly 1 , comprising the above-mentioned stator core 11 and an armature winding 12 , wherein the armature winding 12 is arranged in a plurality of stator slots 113 .

[0102] Multiple coils are installed in stator slots 113. Connecting wires connect the coils of a single phase, distributed across different stator slots 113, in series. One end of the series connection is connected to the wires of the other phases, and the other end is led out of the outlet slots to connect to the controller. The coils in stator slots 113 are connected in multiple phases to form the armature winding 12.

[0103] According to the third aspect of this application, referring to Figure 1 、 Figures 7 to 9 、 Figure 11 as well as Figure 13As shown, a motor 100 is provided, which includes the above-mentioned stator assembly 1 and a mover assembly. The mover assembly moves relative to the stator assembly 1. The motor 100 can be a linear motor.

[0104] In some embodiments, reference Figure 1 、 Figures 7 to 9 、 Figure 11 as well as Figure 13 As shown, along the moving direction of the mover assembly, the size of the mover assembly can be larger than that of the stator assembly 1, that is, the stator is shorter and the mover is longer. In other embodiments, the size of the stator assembly 1 can be larger than that of the mover assembly, that is, the mover is shorter and the stator is longer.

[0105] Reference Figure 1 As shown, the mover assembly includes a magnet 21 and a housing 22. The magnet 21 is mounted on the side wall of the housing 22. In some embodiments, referring to Figure 1 、 Figures 7 to 9 、 Figure 11 as well as Figure 13 As shown, at least a portion of the stator assembly 1 is located inside the mover assembly, i.e., an outer mover and an inner stator. For example, the magnet 21 and a portion of the stator assembly 1 are disposed in a receiving cavity of the housing 22. In other implementations, the stator assembly 1 is disposed around the mover assembly, i.e., an inner mover and an outer stator.

[0106] In some embodiments, the rotor pole pitch of the rotor assembly is e, and the length of the stator core 11 is a, where a=e(k±0.5), where k is a positive integer. This configuration allows the end forces at both ends of the stator core 11 to cancel each other out.

[0107] In some embodiments, an air gap is provided between the stator core 11 of the stator assembly 1 and the magnetic steel 21 of the rotor assembly. The air gap has a size of 0.5 mm to 2 mm in the radial direction of the stator core 11. This arrangement ensures an appropriate air gap size and maintains the performance of the motor 100.

[0108] According to the fourth aspect of this application, referring to Figure 17 As shown, a suspension system 200 is provided, which includes the aforementioned motor 100. The motor 100 can serve as a shock absorber for the suspension system 200. By installing the motor 100 in the suspension system 200, the overall performance of the vehicle 300 can be improved through the cooperation between the motor 100 and the braking and steering systems of the vehicle 300.

[0109] According to the fifth aspect of this application, referring to Figure 18As shown, a vehicle 300 is provided, including the aforementioned suspension system 200. Vehicle 300 may be a fuel-powered vehicle, a plug-in hybrid vehicle, or a new energy vehicle, and this disclosure does not specifically limit this. By providing suspension system 200 on vehicle 300, the impact of road bumps on occupants can be reduced, improving the ride comfort of vehicle 300. It can also help reduce impacts on the chassis and body of vehicle 300, helping to maintain the stability of vehicle 300 under various road conditions.

[0110] The following tests are conducted on the performance of the motors of some embodiments of the present application and motors in related technologies by combining the test results of the magnetic resistance peak, magnetic resistance, motor thrust and load harmonic content distribution diagram. Figure 2 As shown, the second central axis of the slot mouth portion of the stator slot of the motor coincides with the first central axis of the slot body portion.

[0111] Reference Figure 3 It can be seen that compared with the peak reluctance force of motors in related arts, in some embodiments of the present application, when the value of P / W1 is less than or equal to 0.09, the corresponding peak reluctance force is smaller. Moreover, when the value of P / W1 is greater than or equal to 0.06 and less than or equal to 0.08, the peak reluctance force of the motor is further reduced.

[0112] Reference Figure 4 It can be seen that compared with the magnetic resistance of the motor in the related art, the magnetic resistance of the motor in some embodiments of the present application is smaller.

[0113] Reference Figure 5 It can be seen that the motor thrust of the motors in some embodiments of the present application is much greater than the motor thrust of the motors in the related art.

[0114] Reference Figure 6 It can be seen that, compared with motors using phase change technology, the third and seventh harmonics in the motor thrust of the motors in some embodiments of the present application are effectively reduced.

[0115] Therefore, combined Figures 3 to 6 It can be seen that the value of P / W1 is less than or equal to 0.09, which can reduce the magnetic resistance and the peak value of the magnetic resistance when the motor is working, and at the same time increase the motor thrust to improve the problem of large thrust fluctuation, thereby reducing the vibration and noise generated when the motor is working.

[0116] Reference Figure 10 It can be seen that compared with the motor of the related art, Figure 8 The motor shown, that is, the slot portion of the first stator slot is defined by a first tooth shoe portion 114A and a second tooth shoe portion 114B, and the second center axis of the slot portion of the first stator slot is offset toward one of the first end and the second end relative to the first center axis of the slot body portion, so that the magnetic resistance of the motor is effectively weakened.

[0117] Reference Figure 12 It can be seen that compared with the motor of the related art, Figure 11 The motor shown, i.e., a first stator slot group 113Z1 including a plurality of first stator slots 113A and a second stator slot group 113Z2 including a plurality of second stator slots 113B, are arranged around the stator center axis 11A of the stator core 11, and the offset directions of the second center axes of the slot openings 1132 of the second stator slots 113B and the first stator slots 113A are opposite, so that the magnetic resistance of the motor is effectively weakened.

[0118] Reference Figure 14 It can be seen that compared with the motor of the related art, Figure 13 In the motor shown, the first stator slot 113A and the second stator slot 113B are arranged adjacent to each other in the axial direction of the stator core, and the second central axes of the slot openings 1132 of the second stator slot 113B and the first stator slot 113A are offset in opposite directions, so that the magnetic resistance of the motor is effectively weakened.

[0119] Reference Figure 15 It can be seen that Figure 7 The slot opening 1132 of the first stator slot 113A and Figure 9 The second central axis of the slot portion 1132 of the second stator slot 113B is offset in one direction. Figure 13 The offset directions of the second central axes of the slot openings 1132 of the second stator slot 113B and the first stator slot 113A are opposite, which can more significantly weaken the magnetic resistance of the motor.

[0120] Therefore, combined Figure 10 、 Figure 12 、 Figure 14 as well as Figure 15 It can be seen that, compared with the motors in the related art, the motors in some embodiments of the present application can significantly reduce the magnetic resistance of the motor.

[0121] Reference Figure 16 It can be seen that compared with the related art, in some embodiments of the present application, when the value of D1 / W1 is less than or equal to 0.25, the peak reluctance force of the motor can be reduced. Moreover, when the value of D1 / W1 is greater than or equal to 0.1 and less than or equal to 0.25, the peak reluctance force of the motor can be significantly reduced.

[0122] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0123] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0124] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0125] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. Although the descriptions of each embodiment in the embodiments of the present application have different focuses, for parts that are not described in detail in a certain embodiment, please refer to the relevant contents of other embodiments. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A stator core (11), characterized in that: include: A plurality of stator teeth (112) are distributed along the axial direction of the stator core (11), and stator slots (113) are formed between the plurality of stator teeth (112); the stator slots (113) include a slot body portion (1131) and a slot opening portion (1132) arranged along the radial direction of the stator core (11), the slot body portion (1131) having a first central axis (O1), and the slot opening portion (1132) having a second central axis (O2); The second central axis (O2) of the stator slot (113) is parallel to the first central axis (O1) and is offset by a distance P relative to the first central axis (O1) in the axial direction of the stator core (11); and the size of the slot main body (1131) in the axial direction of the stator core (11) is W1; P and W1 satisfy the formula 0<P / W1≤0.

09.

2. The stator core (11) according to claim 1, characterized in that 0.06≤P / W1≤0.

08.

3. The stator core (11) according to claim 1, characterized in that In the axial direction of the stator core (11), the stator core (11) has a first end (11B) and a second end (11C) opposite to each other; The plurality of stator slots (113) include a first stator slot (113A); in the axial direction of the stator core (11), the second center axis (O2) of the first stator slot (113A) is offset relative to the first center axis (O1) toward one of the first end (11B) and the second end (11C).

4. The stator core (11) according to claim 3, characterized in that The stator core (11) further comprises: A first tooth shoe portion (114A) is connected to the end of the stator tooth (112), and extends toward one of the first end (11B) and the second end (11C) along the axial direction of the stator core (11).

5. The stator core (11) according to claim 4, characterized in that The stator core (11) further comprises: a second tooth shoe portion (114B), the second tooth shoe portion (114B) being connected to the end of the stator tooth (112) and extending in the axial direction of the stator core (11), the extension direction of the second tooth shoe portion (114B) being opposite to the extension direction of the first tooth shoe portion (114A); Wherein, in the axial direction of the stator core (11), the size of the second tooth shoe portion (114B) is smaller than the size of the first tooth shoe portion (114A).

6. The stator core (11) according to claim 3, characterized in that The plurality of stator slots (113) further include a second stator slot (113B), wherein in the axial direction of the stator core (11), the second center axis (O2) of the second stator slot (113B) is offset relative to the first center axis (O1) toward the other of the first end (11B) and the second end (11C).

7. The stator core (11) according to claim 6, characterized in that Along the axial direction of the stator core (11), a plurality of the first stator slots (113A) are adjacently arranged to form a first stator slot group (113Z1), and a plurality of the second stator slots (113B) are adjacently arranged to form a second stator slot group (113Z2); The first stator slot group (113Z1) and the second stator slot group (113Z2) are arranged around the stator center axis (11A) of the stator core (11).

8. The stator core (11) according to claim 6, characterized in that In the axial direction of the stator core (11), the first stator slot (113A) and the second stator slot (113B) are arranged adjacent to each other.

9. The stator core (11) according to claim 1, characterized in that Also includes: A tooth shoe portion (114) is connected to one end of the stator tooth (112) and extends along the axial direction of the stator core; the radial dimension of the tooth shoe portion (114) along the stator core (11) is D1; wherein D1 and W1 satisfy the formula 0<D1 / W1≤0.

25.

10. The stator core (11) according to claim 9, characterized in that 0.1≤D1 / W1≤0.

25.

11. The stator core (11) according to claim 1, characterized in that Along the axial direction of the stator core (11), the size of the stator core (11) is a, and the number of the stator slots (113) is c; a, W1, c, and d satisfy the formula W1=ad / c, and the value of d is 0.3-0.

7.

12. The stator core (11) according to claim 1, characterized in that The dimension of the slot portion (1132) along the axial direction of the stator core (11) is W2; wherein W2 and W1 satisfy the formula 0.85≤W2 / W1≤0.

95.

13. A stator assembly (1), characterized in that The invention comprises the stator core (11) and the armature winding (12) according to any one of claims 1 to 12, wherein the armature winding (12) is arranged in a plurality of the stator slots (113).

14. A motor (100), characterized in that include: The stator assembly (1) according to claim 13; as well as The mover assembly (2) moves relative to the stator assembly (1).

15. A suspension system (200), characterized in that: The invention comprises an electric motor (100) as claimed in claim 14.

16. A vehicle (300), characterized in that Comprising the suspension system (200) as claimed in claim 15.

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