Stator, motor, pump body and vehicle

Abstract

The utility model provides a stator, a motor, a pump body and a vehicle. The stator comprises a stator iron core, and the stator iron core comprises a first punching sheet and a second punching sheet, the first punching sheet is located between the two punching sheet groups, and each punching sheet group comprises n second punching sheets; each of the first punching sheet and the second punching sheet comprises a yoke part; each tooth part comprises a tooth body and a tooth boot, and the tooth bodies are connected between the inner peripheral wall of the yoke part and the tooth boots; in the circumferential direction of the stator core, the width of the tooth body of the first punching sheet is recorded as t0, and the width of the tooth body of the ith second punching sheet is recorded as ti; along the axial direction of the stator iron core, the thickness of the first punching sheet is recorded as d0, and the sum of the thicknesses of the two punching sheet groups is recorded as d1; wherein 0.7 < = ti / t0 < = 0.85, 0.1 * d0 < = d1 < = 0.3 * d0, i and n are positive integers, i < = n, and n > = 1. According to the invention, the relation among ti, t0, d1 and d0 is reasonably set, so that the performance of the motor is considered under the condition of reducing the size of the end part of the winding of the motor, and the reduction of copper loss and the improvement of the efficiency of the motor are facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a stator, a motor, a pump body and a vehicle. Background Art

[0002] At present, with the promotion and increase in demand for new energy vehicles, the requirements for intelligent and energy-efficient pump bodies are gradually increasing.

[0003] Due to the limitations of controller hardware and software, the motors of the pump body currently use a few-pole slot structure. Compared with the motors with multi-pole slot structure, this structure has the problem of higher ends. Especially when the copper loss accounts for a high proportion, the efficiency of the motor is low due to the excessively high copper loss at the ends. Utility Model Content

[0004] This application aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, a first aspect of the present application provides a stator.

[0006] A second aspect of the present application provides an electric motor.

[0007] A third aspect of the present application provides a pump body.

[0008] A fourth aspect of the present application provides a vehicle.

[0009] In view of this, the first aspect of the present application provides a stator, including a stator core, the stator core including: a first punching sheet; two punching sheet groups, the first punching sheet is located between the two punching sheet groups, and the punching sheet group includes n second punching sheets; the first punching sheet and the second punching sheet each include: a yoke, the yoke is an annular structure; a plurality of teeth, the tooth portion includes a tooth body and a tooth shoe, the tooth body is connected between the inner circumferential wall of the yoke and the tooth shoe, and the plurality of teeth are arranged at intervals along the circumferential direction of the stator core; along the circumferential direction of the stator core, the width of the tooth body of the first punching sheet is denoted as t0, and the width of the tooth body of the i-th second punching sheet is denoted as ti; along the axial direction of the stator core, the thickness of the first punching sheet is denoted as d0, and the sum of the thicknesses of the two punching sheet groups is denoted as d1; wherein, ti<t0, d1<d0, i≤n, n≥1, and i and n are both positive integers.

[0010] The present application provides a stator, comprising a stator core, the stator core comprising a first punching sheet and two punching sheet groups, wherein the first punching sheet is located between the two punching sheet groups along the axial direction of the stator core, and the punching sheet group comprises n second punching sheets, where n≥1.

[0011] The first punching sheet includes a yoke and a plurality of teeth. The teeth include a tooth body and a tooth shoe. The tooth body is connected between the inner circumferential wall of the yoke and the tooth shoe. The plurality of teeth are spaced apart along the circumferential direction of the stator core.

[0012] The second punching sheet includes a yoke and a plurality of teeth. The teeth include a tooth body and a tooth shoe. The tooth body is connected between the inner circumferential wall of the yoke and the tooth shoe. The plurality of teeth are spaced apart along the circumferential direction of the stator core.

[0013] The circumferential width of the first punching sheet is t0, and the circumferential width of the i-th second punching sheet is ti. The axial thickness of the first punching sheet is d0, and the total axial thickness of the two punching sheet groups is d1.

[0014] Among them, t0 and ti satisfy: ti<t0, i≤n, n≥1. That is, the circumferential width of the tooth body of the second punching sheet located at the end of the first punching sheet is smaller than the circumferential width of the tooth body of the first punching sheet, so that a groove can be formed between the tooth body of the punching sheet group and the tooth body of the first punching sheet. When assembling the insulating frame of the stator, a portion of the insulating frame can be embedded in the groove. In this way, when the winding of the motor is subsequently wound, the height of the end of the winding protruding from the stator core in the axial direction of the stator core can be effectively reduced, which can solve the problem of low efficiency of the motor when the copper loss accounts for a high proportion. It takes into account both saturation current and copper loss, which is conducive to reducing copper loss. If ti≥t0, no groove will be formed between the punching sheet group and the first punching sheet, and the use requirement of a portion of the insulating frame being sunk into the groove cannot be met. In this way, the end size of the winding cannot be reduced, and the efficiency of the motor cannot be effectively improved.

[0015] At the same time, ti<t0 is conducive to reducing the amount of winding, making the winding more neat when winding, and avoiding the situation where the winding falls off the insulating end plate of the stator due to loose winding.

[0016] Among them, d1 and d0 satisfy: d1<d0. That is, along the axial direction of the stator core, the thickness of the first punching sheet d0 is greater than the sum of the thicknesses of the two punching sheet groups d1. This takes into account both the end dimensions of the winding and the performance of the motor. If d1 is greater than or equal to d0, that is, the sum of the thicknesses of the two punching sheet groups is greater than or equal to the thickness of the first punching sheet, magnetic saturation is likely to occur, affecting the current density of the motor and causing a decrease in motor performance, which can effectively improve motor efficiency.

[0017] That is to say, ti, t0, d1 and d0 are coordinated to reduce the end size of the motor winding while taking into account the performance of the motor, which is beneficial to reducing copper loss and improving the efficiency of the motor.

[0018] It can be understood that i is a positive integer, such as i=1, i=2, i=3 and i=4, etc., which are not listed here one by one.

[0019] It can be understood that n is a positive integer, such as n=1, n=2, n=3 and n=4, etc., which are not listed here one by one.

[0020] The stator core described above in this application may also have the following additional technical features:

[0021] In some embodiments, optionally, ti, t0, d1 and d0 satisfy: 0.7≤ti / t0≤0.85, 0.1×d0≤d1≤0.3×d0.

[0022] In this embodiment, the matching relationship among ti, t0, d1 and d0 is further defined.

[0023] Specifically, ti, t0, d1 and d0 satisfy: 0.7≤ti / t0≤0.85, 0.1×d0≤d1≤0.3×d0.

[0024] When the ratio of ti to t0 is within the range of greater than or equal to 0.7 and less than or equal to 0.85, the oversaturation and undersaturation regions of the magnetic density design are avoided, and the copper loss can be reduced.

[0025] If ti / t0 is less than 0.7, magnetic saturation is likely to occur, which will affect the current density of the motor and cause the performance of the motor to deteriorate.

[0026] If ti / t0>0.85, the size of the sinking groove formed between the punching sheet group and the first punching sheet is too small to meet the requirement of sinking a part of the insulating frame into the sinking groove. In this way, the size of the end of the winding is not significantly reduced, and the efficiency of the motor cannot be effectively improved.

[0027] When the ratio of d1 to d0 is within a range of greater than or equal to 0.1 and less than or equal to 0.3, both the end size of the winding and the efficiency of the motor can be taken into consideration.

[0028] If d1 / d0 is less than 0.1, the size of the sinking groove formed between the punching sheet group and the first punching sheet is too small to meet the requirement of sinking a part of the insulating frame into the sinking groove. In this way, the size of the end of the winding is not significantly reduced, and the efficiency of the motor cannot be effectively improved.

[0029] If d1 / d0>0.3, magnetic saturation is likely to occur, affecting the current density of the motor and causing the performance of the motor to deteriorate.

[0030] In some embodiments, optionally, along the radial direction of the stator core, the width of the yoke of the first punching sheet is recorded as h0, and the width of the yoke of the i-th second punching sheet is recorded as hi; wherein hi<h0.

[0031] In this embodiment, the matching structure of the first punching sheet and the second punching sheet is further defined.

[0032] Specifically, the width of the yoke of the first punching sheet in the radial direction of the stator core is h0, the width of the yoke of the i-th second punching sheet in the radial direction of the stator core is hi, and the relationship between h0 and hi satisfies: hi<h0.

[0033] Furthermore, a width t0 of the tooth body of the first punching sheet in the circumferential direction of the stator core and a width ti of the tooth body of the i-th second punching sheet in the circumferential direction of the stator core satisfy: ti<t0.

[0034] This arrangement enables a recessed groove to be enclosed between the yoke of the sheet group, the yoke of the first sheet, the teeth of the sheet group, and the teeth of the first sheet. When assembling the insulating frame of the stator, a portion of the insulating frame can be embedded in the recessed groove. In this way, when subsequently winding the windings of the motor, the height of the end of the winding protruding from the stator core in the axial direction of the stator core can be effectively reduced, which can solve the problem of low motor efficiency when the copper loss ratio is high, and is conducive to reducing copper loss. At the same time, this structural arrangement can increase the fitting area and fitting angle between the insulating frame and the stator core, and can ensure the stability and reliability of the assembly of the insulating frame and the stator core.

[0035] If hi≥h0, the contact area between the first punching sheet and the punching sheet group and the insulating frame is small, the insulating frame assembly is unstable, the end size of the winding cannot be effectively reduced, and the efficiency of the motor cannot be effectively improved.

[0036] In some embodiments, optionally, hi and h0 satisfy: 0.7≤hi / h0≤0.85.

[0037] In this embodiment, the matching relationship between hi and h0 is further defined.

[0038] Specifically, hi and h0 satisfy: 0.7≤hi / h0≤0.85.

[0039] When the ratio of hi and h0 is within the range of greater than or equal to 0.7 and less than or equal to 0.85, hi, h0, ti, t0, d1 and d0 are coordinated to take into account the performance of the motor while reducing the end size of the motor winding, which is beneficial to reducing copper loss and improving the efficiency of the motor.

[0040] If hi / h0 is less than 0.7, the structural strength and rigidity of the yoke portion of the second punching plate are relatively low, and the second punching plate is prone to deformation.

[0041] If hi / h0>0.85, the contact area between the first punching sheet and the punching sheet group and the insulating frame is small, the insulating frame assembly is unstable, the end size of the winding cannot be effectively reduced, and the efficiency of the motor cannot be effectively improved.

[0042] In some embodiments, optionally, the stator core is sectioned along an axial direction perpendicular to the stator core, and the cross-sectional area of the first punching sheet is recorded as S0, and the cross-sectional area of the i-th second punching sheet is recorded as Si, where S0>Si.

[0043] In this embodiment, the matching structure of the first punching sheet and the second punching sheet is further defined.

[0044] Specifically, the stator core is sectioned along an axial direction perpendicular to the stator core, and the cross-sectional area S0 of the first punching sheet and the cross-sectional area Si of the i-th second punching sheet satisfy: S0>Si.

[0045] Among them, ti, t0, d1, d0, S0, and Si are coordinated to meet the requirement that the second and first punching sheets of the punching sheet group enclose a recessed groove. This allows a portion of the insulating frame to be embedded in the recessed groove during assembly of the stator insulation frame. This effectively reduces the height of the winding end protruding from the stator core in the axial direction during subsequent winding of the motor, thereby resolving the problem of low motor efficiency when copper loss accounts for a high proportion.

[0046] In some embodiments, optionally, when n>1, the cross-sectional areas of the n second punching sheets gradually decrease from the first punching sheet to the punching sheet group.

[0047] In this embodiment, the structure of the punching sheet group is further defined.

[0048] The punching sheet group includes n second punching sheets, where n is greater than 1. That is, the punching sheet group includes a plurality of second punching sheets, and the number of the second punching sheets is greater than or equal to 2.

[0049] In a lamination group, the cross-sectional areas of the n second laminations gradually decrease from the first lamination to the rest of the group. That is, the second lamination with the largest cross-sectional area is located immediately adjacent to the first lamination, while the second lamination with the smallest cross-sectional area is located furthest from the first lamination. In other words, the second lamination with the smallest cross-sectional area is located at the end of the stator core.

[0050] This arrangement allows the first punch and the punch group to be arranged at an angle to enclose the groove, which can meet the installation requirements of various types of insulating frames (such as the edges of the insulating frame extending at an angle) and can meet the installation requirements of various types of motors.

[0051] In some embodiments, optionally, along the first punching sheet to the punching sheet group, the thickness of the i-th second punching sheet of one punching sheet group is recorded as di1, and the thickness of the i-th second punching sheet of another punching sheet group is recorded as di2; wherein 0.8≤di1 / di2≤1.2.

[0052] In this embodiment, the matching structure of the two punching sheet groups is further defined.

[0053] Among them, along the first punching sheet to the punching sheet group, the second punching sheet in the punching sheet group close to the first punching sheet is the first second punching sheet, and the second punching sheet farthest from the first punching sheet in the punching sheet group is the nth second punching sheet.

[0054] From the first punching sheet to the punching sheet group, the thickness of the second punching sheet of the i-th punching sheet in one punching sheet group is di1, and the thickness of the second punching sheet of the i-th punching sheet in another punching sheet group is di2. The relationship between di1 and di2 satisfies: 0.8≤di1 / di2≤1.2.

[0055] Specifically, when 0.8≤di1 / di2≤1.2 and di1≠di2, that is, along the axial direction of the stator core, the thickness of the second punching sheet located on the first side of the first punching sheet is not equal to the thickness of the second punching sheet located on the second side of the first punching sheet. For example, an insulating frame with a greater axial height can be installed on the side of the punching sheet group with smaller thickness. For example, insulating frames of the same size can be installed, and so on. This setting can meet the use requirements of various models of products.

[0056] Specifically, when di1 = di2, that is, along the axial direction of the stator core, the thickness of the lamination group located on the first side of the first lamination is equal to the thickness of the lamination group located on the second side of the first lamination. For example, insulation frames of different sizes can be installed. For example, insulation frames of the same size can be installed.

[0057] In this way, while ensuring the use requirement of reducing the end height of the winding, it can adapt to different types of insulation frames and meet the use requirements of different types of motors.

[0058] In some embodiments, optionally, the yoke of the punching sheet group, the two adjacent teeth of the punching sheet group and the axial end face of the first punching sheet enclose a recessed groove; the stator also includes an insulating frame, which is arranged at the end of the stator core along the axial direction of the stator, and a part of the insulating frame is clamped in the recessed groove; the winding is wound around the stator core through the insulating frame.

[0059] In this embodiment, the stator further includes an insulating frame and a winding, and defines a matching structure of the stator core, the insulating frame and the winding.

[0060] 0.7≤ti / t0≤0.85, hi<h0, i≤n, n≥1, i and n are both positive integers. That is, the radial width of the yoke of the punching sheet group is smaller than the radial width of the yoke of the first punching sheet, and the circumferential width of the tooth body of the punching sheet group is smaller than the circumferential width of the tooth body of the first punching sheet. In this way, a step structure is formed between the punching sheet group and the first punching sheet, that is, the yoke of the punching sheet group, the two adjacent teeth of the punching sheet group and the axial end face of the first punching sheet enclose a recessed groove. After assembling the insulating frame, a part of the insulating frame is clamped in the recessed groove. The recessed groove has the function of limiting and fixing the insulating frame. In this way, when the winding is subsequently wound, the height of the end of the winding protruding from the stator core in the axial direction of the stator core can be effectively reduced, which can solve the problem of low efficiency of the motor when the copper loss accounts for a high proportion, taking into account the saturation current and copper loss, which is conducive to reducing copper loss.

[0061] Specifically, along the axial direction of the stator, the insulating frame is provided at the end of the stator core, and the winding is wound around the stator core through the insulating frame.

[0062] The insulating frame can achieve electrical isolation and ensure the safety and reliability of product use.

[0063] A second aspect of the present invention provides a motor, comprising: a rotor; and a stator as in the first aspect, wherein the stator core is disposed around the outside of the rotor, and the rotor is rotatable relative to the stator.

[0064] The motor provided by the present invention includes the stator as described in the second aspect, and therefore has all the beneficial effects of the above-mentioned stator, which will not be described one by one here.

[0065] Optionally, the multiple teeth of the stator core enclose a mounting cavity, the rotor is located in the mounting cavity, and the rotor can rotate relative to the stator. In other words, the motor is an inner rotor and outer stator motor.

[0066] In some embodiments, optionally, two adjacent teeth and a yoke of the stator enclose a stator slot, the number of stator slots is denoted as Z, and the number of poles of the motor is denoted as P; wherein Z / P=3 / 2, or Z / P=6 / 5.

[0067] In this embodiment, the structure of the motor is further defined.

[0068] Two adjacent teeth and a yoke of the stator enclose a stator slot.

[0069] Specifically, the number of poles P of the motor and the number of stator slots Z satisfy Z / P=3 / 2.

[0070] Specifically, the number of poles P of the motor and the number of stator slots Z satisfy Z / P=6 / 5.

[0071] The third aspect of the present invention provides a pump body, comprising: the motor as in the second aspect.

[0072] The pump body provided by the present invention includes the motor as in the second aspect, and therefore has all the beneficial effects of the above-mentioned motor, which will not be described one by one here.

[0073] Optionally, the pump body comprises a water pump.

[0074] A fourth aspect of the present invention provides a vehicle, comprising: the motor as in the second aspect; or the pump body as in the third aspect.

[0075] The vehicle provided by the present invention includes the motor as in the second aspect or the pump body as in the third aspect, and therefore has all the beneficial effects of the above-mentioned motor or pump body, which will not be described one by one here.

[0076] It is worth noting that the vehicle can be a new energy vehicle, which includes pure electric vehicles, extended-range electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc.

[0077] The vehicle may also be a gasoline-powered vehicle.

[0078] Additional aspects and advantages of the present application will become apparent in the following description or may be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0080] Figure 1 A schematic structural diagram of a stator according to an embodiment of the present application is shown;

[0081] Figure 2 A schematic diagram of the first part of the structure of a stator according to an embodiment of the present application is shown;

[0082] Figure 3 A schematic diagram of the second part of the structure of the stator according to an embodiment of the present application is shown;

[0083] Figure 4 A schematic structural diagram of a stator core according to a first embodiment of the present application is shown;

[0084] Figure 5 A schematic structural diagram of a stator core according to a second embodiment of the present application is shown;

[0085] Figure 6 A schematic structural diagram of a motor according to an embodiment of the present application is shown;

[0086] Figure 7 A schematic diagram of a curve showing changes in saturation current and copper loss with changes in ti / t0 of the present application is shown;

[0087] Figure 8 A schematic curve diagram showing how the motor efficiency of the present application changes with changes in d1 / d0 is shown.

[0088] in, Figures 1 to 6 The corresponding relationship between the reference numerals and component names is as follows:

[0089] 10 stator core, 11 sink, 100 first punch, 200 punch group, 210 second punch, 300 yoke, 310 inner wall of yoke, 400 tooth, 410 tooth body, 420 tooth shoe, 500 stator slot, 60 stator, 600 insulation frame, 700 winding, 80 motor, 800 rotor. DETAILED DESCRIPTION

[0090] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0091] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0092] Refer to the following Figures 1 to 8 A stator 60 , a motor 80 , a pump body, and a vehicle according to some embodiments of the present application.

[0093] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, a stator 60 according to some embodiments of the present application includes a stator core 10 , and the stator core 10 includes a first punching sheet 100 and two punching sheet groups 200 .

[0094] The first punching sheet 100 is located between the two punching sheet groups 200 .

[0095] The punching sheet group 200 includes n second punching sheets 210 .

[0096] The first punch 100 and the second punch 210 each include a yoke 300 and a plurality of teeth 400 .

[0097] The yoke 300 is an annular structure.

[0098] The tooth portion 400 includes a tooth body 410 and a tooth shoe 420 .

[0099] The tooth body 410 is connected between the inner peripheral wall 310 of the yoke and the tooth shoe 420 .

[0100] The plurality of teeth 400 are arranged at intervals along the circumferential direction of the stator core 10 .

[0101] Along the circumferential direction of the stator core 10 , the width of the tooth body 410 of the first punching sheet 100 is denoted as t0 , and the width of the tooth body 410 of the i-th second punching sheet 210 is denoted as ti.

[0102] Along the axial direction of the stator core 10 , the thickness of the first punching sheet 100 is recorded as d0 , and the total thickness of the two punching sheet groups 200 is recorded as d1 .

[0103] Wherein, ti<t0, d1<d0, i≤n, n≥1, and both i and n are positive integers.

[0104] The present application provides a stator 60, which includes a stator core 10. The stator core 10 includes a first punching sheet 100 and two punching sheet groups 200. Along the axial direction of the stator core 10, the first punching sheet 100 is located between the two punching sheet groups 200. The punching sheet group 200 includes n second punching sheets 210, where n≥1.

[0105] The first punching sheet 100 includes a yoke 300 and a plurality of teeth 400 . The teeth 400 include a tooth body 410 and a tooth shoe 420 . The tooth body 410 is connected between the inner peripheral wall 310 of the yoke and the tooth shoe 420 . The plurality of teeth 400 are arranged at intervals along the circumferential direction of the stator core 10 .

[0106] The second punching sheet 210 includes a yoke 300 and a plurality of teeth 400 . The teeth 400 include a tooth body 410 and a tooth shoe 420 . The tooth body 410 is connected between the inner peripheral wall 310 of the yoke and the tooth shoe 420 . The plurality of teeth 400 are arranged at intervals along the circumference of the stator core 10 .

[0107] The circumferential width of the tooth body 410 of the first punching sheet 100 in the stator core 10 is t0, and the circumferential width of the tooth body 410 of the i-th second punching sheet 210 in the stator core 10 is ti. The axial thickness of the first punching sheet 100 in the stator core 10 is d0, and the total thickness of the two punching sheet groups 200 in the stator core 10 in the axial direction is d1.

[0108] Among them, t0 and ti satisfy: ti<t0, i≤n, n≥1. That is, the circumferential width of the tooth body 410 of the second punching sheet 210 located at the end of the first punching sheet 100 is smaller than the circumferential width of the tooth body 410 of the first punching sheet 100, so that a recessed groove can be formed between the tooth body 410 of the punching sheet group 200 and the tooth body 410 of the first punching sheet 100. When assembling the insulating frame 600 of the stator 60, a portion of the insulating frame 600 can be embedded in the recessed groove. In this way, when the winding 700 of the motor 80 is subsequently wound, the height of the end of the winding 700 protruding from the stator core 10 in the axial direction of the stator core 10 can be effectively reduced, which can solve the problem of low efficiency of the motor 80 when the copper loss accounts for a high proportion, taking into account both the saturation current and the copper loss, and is conducive to reducing the copper loss. If ti≥t0, no groove will be formed between the punching sheet group 200 and the first punching sheet 100, and the requirement of sinking a portion of the insulating frame 600 into the groove cannot be met. In this way, the end size of the winding 700 cannot be reduced, and the efficiency of the motor 80 cannot be effectively improved.

[0109] At the same time, ti<t0 is conducive to reducing the amount of winding 700, making the winding 700 more neat when winding the winding 700, and avoiding the situation where the winding 700 falls off the insulating end plate of the stator 60 due to looseness of the winding 700.

[0110] Among them, d1 and d0 satisfy: d1<d0. That is, along the axial direction of the stator core 10, the thickness d0 of the first punching sheet 100 is greater than the sum of the thicknesses d1 of the two punching sheet groups 200. This is to take into account the end size of the winding 700 and the performance of the motor 80. If d1 is greater than or equal to d0, that is, the sum of the thicknesses of the two punching sheet groups 200 is greater than or equal to the thickness of the first punching sheet 100, magnetic saturation is likely to occur, which affects the current density of the motor 80 and causes the performance of the motor 80 to decline, which can effectively improve the efficiency of the motor 80.

[0111] That is to say, ti, t0, d1 and d0 are coordinated to reduce the end size of the winding 700 of the motor 80 while taking into account the performance of the motor 80, which is beneficial to reducing copper loss and improving the efficiency of the motor 80.

[0112] It can be understood that i is a positive integer, such as i=1, i=2, i=3 and i=4, etc., which are not listed here one by one.

[0113] It can be understood that n is a positive integer, such as n=1, n=2, n=3 and n=4, etc., which are not listed here one by one.

[0114] In some embodiments, optionally, ti, t0, d1 and d0 satisfy: 0.7≤ti / t0≤0.85, 0.1×d0≤d1≤0.3×d0.

[0115] In this embodiment, the matching relationship among ti, t0, d1 and d0 is further defined.

[0116] Specifically, ti, t0, d1 and d0 satisfy: 0.7≤ti / t0≤0.85, 0.1×d0≤d1≤0.3×d0.

[0117] When the ratio of ti to t0 is within the range of greater than or equal to 0.7 and less than or equal to 0.85, the oversaturation and undersaturation regions of the magnetic density design are avoided, and the copper loss can be reduced.

[0118] If ti / t0 is less than 0.7, magnetic saturation may occur, which may affect the current density of the motor 80 and cause the performance of the motor 80 to deteriorate.

[0119] If ti / t0>0.85, the size of the sinking groove formed between the punching sheet group 200 and the first punching sheet 100 is too small to meet the use requirement of sinking a part of the insulating frame 600 into the sinking groove. In this way, the end size of the winding 700 is not significantly reduced, and the efficiency problem of the motor 80 cannot be effectively improved.

[0120] When the ratio of d1 to d0 is within a range of greater than or equal to 0.1 and less than or equal to 0.3, both the end size of the winding 700 and the efficiency of the motor 80 can be taken into consideration.

[0121] If d1 / d0 is less than 0.1, the size of the sinking groove formed between the punching sheet group 200 and the first punching sheet 100 is too small to meet the use requirement of sinking a part of the insulating frame 600 into the sinking groove. In this way, the reduction in the end size of the winding 700 is not obvious, and the efficiency problem of the motor 80 cannot be effectively improved.

[0122] If d1 / d0 > 0.3, magnetic saturation may occur, which may affect the current density of the motor 80 and cause the performance of the motor 80 to deteriorate.

[0123] Optionally, ti / t0=0.72, ti / t0=0.74, ti / t0=0.75, ti / t0=0.78, ti / t0=0.8 and ti / t0=0.82, etc., which are not listed here one by one.

[0124] Optionally, d1 / d0=0.12, d1 / d0=0.15, d1 / d0=0.18, d1 / d0=0.2, d1 / d0=0.22, d1 / d0=0.25 and d1 / d0=0.28, etc., which are not listed here one by one.

[0125] In some embodiments, optionally, as Figure 2 and Figure 3As shown, along the radial direction of the stator core 10 , the width of the yoke 300 of the first punching sheet 100 is recorded as h0, and the width of the yoke 300 of the i-th second punching sheet 210 is recorded as hi.

[0126] Among them, hi<h0.

[0127] In this embodiment, the matching structure of the first punching sheet 100 and the second punching sheet 210 is further defined.

[0128] Specifically, the radial width of the yoke 300 of the first punch 100 in the stator core 10 is h0, and the radial width of the yoke 300 of the i-th second punch 210 in the stator core 10 is hi, and the relationship between h0 and hi satisfies: hi<h0.

[0129] Furthermore, a width t0 of the tooth body 410 of the first punching sheet 100 in the circumferential direction of the stator core 10 and a width ti of the tooth body 410 of the i-th second punching sheet 210 in the circumferential direction of the stator core 10 satisfy: ti<t0.

[0130] This arrangement enables a recess to be enclosed between the yoke 300 of the sheet group 200, the yoke 300 of the first sheet 100, the tooth portion 400 of the sheet group 200, and the tooth portion 400 of the first sheet 100. When assembling the insulating frame 600 of the stator 60, a portion of the insulating frame 600 can be embedded in the recess. In this way, when subsequently winding the winding 700 of the motor 80, the height of the end of the winding 700 protruding from the stator core 10 in the axial direction of the stator core 10 can be effectively reduced, which can solve the problem of low efficiency of the motor 80 when the copper loss accounts for a high proportion, and is conducive to reducing copper loss. At the same time, this structural arrangement can increase the fitting area and fitting angle between the insulating frame 600 and the stator core 10, and can ensure the stability and reliability of the assembly of the insulating frame 600 and the stator core 10.

[0131] If hi≥h0, the contact area between the first punching sheet 100 and the punching sheet group 200 and the insulating frame 600 is small, the insulating frame 600 is assembled unstably, the end size of the winding 700 cannot be effectively reduced, and the efficiency of the motor 80 cannot be effectively improved.

[0132] In some embodiments, optionally, hi and h0 satisfy: 0.7≤hi / h0≤0.85.

[0133] In this embodiment, the matching relationship between hi and h0 is further defined.

[0134] Specifically, hi and h0 satisfy: 0.7≤hi / h0≤0.85.

[0135] When the ratio of hi and h0 is in the range of greater than or equal to 0.7 and less than or equal to 0.85, hi, h0, ti, t0, d1 and d0 cooperate to take into account the performance of the motor 80 while reducing the end size of the winding 700 of the motor 80, which is beneficial to reducing copper loss and improving the efficiency of the motor 80.

[0136] If hi / h0<0.7, the structural strength and rigidity of the yoke 300 of the second punching piece 210 are relatively low, and the second punching piece 210 is prone to deformation.

[0137] If hi / h0>0.85, the contact area between the space between the first punching sheet 100 and the punching sheet group 200 and the insulating frame 600 is small, the insulating frame 600 is assembled unstably, the end size of the winding 700 cannot be effectively reduced, and the efficiency of the motor 80 cannot be effectively improved.

[0138] Optionally, hi / h0=0.72, hi / h0=0.74, hi / h0=0.75, hi / h0=0.78, hi / h0=0.8 and hi / h0=0.82, etc., which are not listed here one by one.

[0139] In some embodiments, optionally, the stator core 10 is cross-sectioned along an axial direction perpendicular to the stator core 10 , the cross-sectional area of the first punching sheet 100 is recorded as S0, the cross-sectional area of the i-th second punching sheet 210 is recorded as Si, and S0>Si.

[0140] In this embodiment, the matching structure of the first punching sheet 100 and the second punching sheet 210 is further defined.

[0141] Specifically, the stator core 10 is sectioned along an axial direction perpendicular to the stator core 10 , and the cross-sectional area S0 of the first punching sheet 100 and the cross-sectional area Si of the i-th second punching sheet 210 satisfy: S0>Si.

[0142] Among them, ti, t0, d1, d0, S0, and Si are coordinated to meet the use requirement of the second punching sheet 210 and the first punching sheet 100 of the punching sheet assembly 200 to enclose a recessed groove. When the insulating frame 600 of the stator 60 is assembled, a portion of the insulating frame 600 can be embedded in the recessed groove. In this way, when the winding 700 of the motor 80 is subsequently wound, the height of the end of the winding 700 protruding from the stator core 10 in the axial direction can be effectively reduced, which can solve the problem of low efficiency of the motor 80 when the copper loss ratio is high.

[0143] In some embodiments, optionally, when n>1, the cross-sectional areas of the n second punching sheets 210 gradually decrease from the first punching sheet 100 to the punching sheet group 200 .

[0144] In this embodiment, the structure of the punching sheet group 200 is further defined.

[0145] The punching sheet group 200 includes n second punching sheets 210 , where n is greater than 1. That is, the punching sheet group 200 includes a plurality of second punching sheets 210 , and the number of the second punching sheets 210 is greater than or equal to 2.

[0146] In the lamination group 200, the cross-sectional areas of the n second laminations 210 gradually decrease along the path from the first lamination 100 to the lamination group 200. In other words, the second lamination 210 with the largest cross-sectional area is located immediately adjacent to the first lamination 100, while the second lamination 210 with the smallest cross-sectional area is located furthest from the first lamination 100. In other words, the second lamination 210 with the smallest cross-sectional area is located at the end of the stator core 10.

[0147] This setting makes the sink enclosed by the first punching sheet 100 and the punching sheet group 200 arranged at an angle, so that it can meet the installation requirements of various models of insulating frames 600 (for example, the edges of the insulating frame 600 extend at an angle) and can meet the installation requirements of various models of motors 80.

[0148] In some other embodiments, when n>1, the cross-sectional areas of the n second punching sheets 210 along the first punching sheet 100 to the punching sheet group 200 are equal.

[0149] In some embodiments, optionally, as Figure 4 and Figure 5 As shown, along the first punching sheet 100 to the punching sheet group 200, the thickness of the i-th second punching sheet 210 of one punching sheet group 200 is recorded as di1, and the thickness of the i-th second punching sheet 210 of another punching sheet group 200 is recorded as di2.

[0150] Among them, 0.8≤di1 / di2≤1.2.

[0151] In this embodiment, the matching structure of the two punching sheet groups 200 is further defined.

[0152] Among them, along the first punch 100 to the punch group 200 , the second punch 210 of the punch group 200 close to the first punch 100 is the first second punch 210 , and the second punch 210 farthest from the punch group 200 to the first punch 100 is the nth second punch 210 .

[0153] From the first punching sheet 100 to the punching sheet group 200, the thickness of the i-th second punching sheet 210 of one punching sheet group 200 is di1, and the thickness of the i-th second punching sheet 210 of another punching sheet group 200 is di2. The relationship between di1 and di2 satisfies: 0.8≤di1 / di2≤1.2.

[0154] Specifically, when 0.8≤di1 / di2≤1.2 and di1≠di2, that is, along the axial direction of the stator core 10, the thickness of the second punching sheet 210 located on the first side of the first punching sheet 100 is not equal to the thickness of the second punching sheet 210 located on the second side of the first punching sheet 100. For example, an insulating frame 600 with a larger axial height can be installed on the side of the punching sheet group 200 with a smaller thickness. For example, insulating frames 600 of the same size can be installed, and so on. This setting can meet the use requirements of various models of products.

[0155] Optionally, the numbers of the second punching sheets 210 in the two punching sheet groups 200 are equal.

[0156] Optionally, the numbers of the second punching sheets 210 in the two punching sheet groups 200 are different.

[0157] Specifically, when di1 = di2, that is, along the axial direction of the stator core 10, the thickness of the punching group 200 located on the first side of the first punching plate 100 is equal to the thickness of the punching group 200 located on the second side of the first punching plate 100. For example, different sizes of insulation frames 600 can be installed, such as insulation frames 600 of the same size, etc., which are not listed here one by one. This configuration can meet the use requirements of various models of products.

[0158] In this way, while ensuring the use requirement of reducing the end height of the winding 700, it can adapt to different types of insulation frames 600 and meet the use requirements of different types of motors 80.

[0159] Optionally, di1 / di2=0.9, di1 / di2=1, di1 / di2=1.1.

[0160] In some embodiments, optionally, as Figure 1 、 Figure 2 and Figure 3 As shown, the yoke 300 of the punching sheet group 200, the two adjacent tooth portions 400 of the punching sheet group 200 and the axial end face of the first punching sheet 100 enclose a recessed groove 11; the stator 60 also includes an insulating frame 60, which is arranged at the end of the stator core 10 along the axial direction of the stator 60, and a part of the insulating frame 60 is clamped in the recessed groove 11; the winding 700 is wound on the stator core 10 through the insulating frame 60.

[0161] In this embodiment, the stator further includes an insulating frame 60 and a winding 700 , and defines a matching structure of the stator core 10 , the insulating frame 60 , and the winding 700 .

[0162] 0.7≤ti / t0≤0.85, hi<h0, i≤n, n≥1, i and n are both positive integers. That is, the radial width of the yoke 300 of the punching sheet group 200 is smaller than the radial width of the yoke 300 of the first punching sheet 100, and the circumferential width of the tooth body 410 of the punching sheet group 200 is smaller than the circumferential width of the tooth body 410 of the first punching sheet 100. In this way, a step structure is formed between the punching sheet group 200 and the first punching sheet 100, that is, the yoke 300 of the punching sheet group 200, the two adjacent tooth portions 400 of the punching sheet group 200, and the axial end face of the first punching sheet 100 enclose a recessed groove 11. After the insulating frame 60 is assembled, a portion of the insulating frame 60 is stuck in the recessed groove 11. The recessed groove 11 serves to limit and secure the insulating frame 60. This effectively reduces the height of the winding 700 protruding axially from the stator core 10 during subsequent winding 700 installation. This addresses the issue of low motor efficiency when copper losses account for a high proportion, balancing saturation current and copper losses, and thus helps reduce copper losses. Specifically, the insulating frame 60 is positioned at the end of the stator core 10 along the axial direction of the stator 60. The winding 700 is wound around the stator core 10 through the insulating frame 60.

[0163] The insulating frame 60 can achieve electrical isolation, thereby ensuring the safety and reliability of product use.

[0164] like Figure 6 As shown, a motor 80 according to some further embodiments of the present application includes: a rotor 800; and a stator 60 as in any of the above embodiments, wherein the stator core 10 is disposed around the outside of the rotor 800, and the rotor 800 can rotate relative to the stator 60.

[0165] The present application provides a motor 80 including a rotor 800 and the stator 60 in the above embodiment.

[0166] The stator core 10 is disposed around the outer side of the rotor 800 , and the rotor 800 is rotatable relative to the stator 60 .

[0167] Optionally, the multiple teeth 400 of the stator core 10 enclose a mounting cavity, and the rotor 800 is located in the mounting cavity, and the rotor 800 can rotate relative to the stator 60. That is, the motor 80 is a motor with an inner rotor and an outer stator.

[0168] Since the motor 80 of the present application includes the stator 60 in the above embodiment, it has all the beneficial effects of the above stator 60, which will not be described one by one here.

[0169] In some embodiments, optionally, as Figure 2 and Figure 3 As shown, two adjacent teeth 400 and the yoke 300 of the stator 60 enclose a stator slot 500 .

[0170] The number of stator slots 500 is denoted as Z.

[0171] The number of poles of the motor 80 is denoted by P.

[0172] Among them, Z / P=3 / 2, or Z / P=6 / 5.

[0173] In this embodiment, the structure of the motor 80 is further defined.

[0174] Two adjacent teeth 400 and the yoke 300 of the stator 60 enclose a stator slot 500 .

[0175] Specifically, the number P of poles of the motor 80 and the number Z of the stator slots 500 satisfy Z / P=3 / 2.

[0176] Specifically, the number P of poles of the motor 80 and the number Z of the stator slots 500 satisfy Z / P=6 / 5.

[0177] According to some further embodiments of the present application, a pump body includes: a motor 80 as in any of the above embodiments.

[0178] The pump body provided by the present invention includes the motor 80 as in any of the above embodiments, and therefore has all the beneficial effects of the above motor 80, which will not be described one by one here.

[0179] According to some further embodiments of the present application, a vehicle includes: the motor 80 as in the above embodiment; or the pump body as in the above embodiment.

[0180] The vehicle provided by the present invention includes the motor 80 or the pump body as in the above embodiment, and therefore has all the beneficial effects of the above motor 80 or the pump body, which will not be described one by one here.

[0181] It is worth noting that the vehicle can be a new energy vehicle, which includes pure electric vehicles, extended-range electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc.

[0182] The vehicle may also be a gasoline-powered vehicle.

[0183] Optionally, the stator core 10 includes multiple types (i.e., greater than or equal to two types) of punching sheets. The various types of punching sheets are stacked axially along the stator core 10. There is a close-fitting insulating frame 600 along the inner side of the stator core 10, and the winding 700 is tightly wound on the insulating frame 600. The axial center plane of the stator core 10 is A, and the punching sheet close to the center plane is the first punching sheet 100, and the cross-sectional area of the first punching sheet 100 is S0. The punching sheets away from the center plane A are all second punching sheets 210. The cross-sectional area of the first second punching sheet 210 is S1, and the ones farther away are marked in sequence as the i-th second punching sheet 210, and the cross-sectional area of the i-th second punching sheet 210 is Si, satisfying S0>S1>…>Si.

[0184] The first punching sheet 100 and the second punching sheet 210 both include a yoke 300 and a plurality of teeth 400 . The teeth 400 include a tooth body 410 and a tooth shoe 420 . The tooth body 410 is connected between the inner circumferential wall 310 of the yoke and the tooth shoe 420 . The plurality of teeth 400 are arranged at intervals along the circumference of the stator core 10 .

[0185] Along the circumferential direction of the stator core 10 , the width of the tooth body 410 of the first punching piece 100 is t0 , the width of the tooth body 410 of the first second punching piece 210 is t1 , and the width of the tooth body 410 of the i-th second punching piece 210 is ti .

[0186] Along the radial direction of the stator core 10 , the width of the yoke 300 of the first punching sheet 100 is h0 , the width of the yoke 300 of the first second punching sheet 210 is h1 , and the width of the yoke 300 of the i-th second punching sheet 210 is hi .

[0187] Among them, 0.7≤t1 / t0≤0.85, 0.7≤h1 / h0≤0.85. Similarly, 0.7≤ti / t0≤0.85, 0.7≤hi / h0≤0.85.

[0188] Along the axial direction of the stator core 10 , the thickness of the first punching sheet 100 is d0 , and the total thickness of the two punching sheet groups 200 is d1 , wherein 0.1×d0 ≤ d1 ≤ 0.3×d0 .

[0189] Optionally, there is an insulating frame 600 tightly attached to the inner side of the stator core 10 , and the winding 700 is tightly wound on the insulating frame 600 .

[0190] Optionally, along the first punching sheet 100 to the punching sheet group 200, the thickness of the i-th second punching sheet 210 of one punching sheet group 200 is recorded as di1, and the thickness of the i-th second punching sheet 210 of another punching sheet group 200 is recorded as di2; wherein 0.8≤di1 / di2≤1.2.

[0191] Optionally, the number of poles of the motor 80 is P, and the number of stator slots 500 of the stator 60 is Z, wherein Z / P=3 / 2 or Z / P=6 / 5.

[0192] like Figure 1 As shown, the motor 80 of the present application includes two first punching sheets 100 and two punching sheet groups 200 .

[0193] like Figure 2 and Figure 3 As shown, along the axial direction of the stator core 10 , the first punching sheet 100 is located between the two punching sheet groups 200 . An insulating frame 600 is tightly attached to the inner side of the stator core 10 , and the winding 700 is tightly wound on the insulating frame 600 .

[0194] like Figure 4 As shown, along the axial direction of the stator core 10, the first punching sheet 100 is located between two punching sheet groups 200. Each punching sheet group 200 includes a second punching sheet 210. Along the inner side of the stator core 10, there is an insulating frame 600 that is tightly attached, and the winding 700 is tightly wound on the insulating frame 600. The axial center plane of the stator 60 is A, and the punching sheet closest to the center plane A is the first punching sheet 100. The cross-sectional area of the first punching sheet 100 is S0 = 1264.5 mm 2 The punching piece away from the center plane A is the second punching piece 210, and the cross-sectional area of the second punching piece 210 is S1 = 1018.3 mm 2 , S0>S1. Along the circumferential direction of the stator core 10, the width of the tooth body 410 of the first punching sheet 100 is t0, the width of the tooth body 410 of the first second punching sheet 210 is t1, and the width of the tooth body 410 of the i-th second punching sheet 210 is ti. Along the radial direction of the stator core 10, the width of the yoke 300 of the first punching sheet 100 is h0, the width of the yoke 300 of the first second punching sheet 210 is h1, and the width of the yoke 300 of the i-th second punching sheet 210 is hi. Among them, 0.7≤t1 / t0≤0.85, 0.7≤h1 / h0≤0.85. Similarly, 0.7≤ti / t0≤0.85, 0.7≤hi / h0≤0.85. Along the axial direction of the stator core 10 , the thickness of the first punching sheet 100 is d0, the thickness of one punching sheet group 200 is d11, the thickness of the other punching sheet group 200 is d12, and the total thickness of the two punching sheet groups 200 is d1, wherein 0.1×d0≤d1≤0.3×d0.

[0195] like Figure 5As shown, along the axial direction of the stator core 10, the first punching sheet 100 is located between two punching sheet groups 200. Each punching sheet group 200 includes two second punching sheets 210. Along the inner side of the stator core 10, there is an insulating frame 600 that is tightly attached, and the winding 700 is tightly wound on the insulating frame 600. The axial center plane of the stator 60 is A, and the punching sheet closest to the center plane A is the first punching sheet 100. The cross-sectional area of the first punching sheet 100 is S0 = 1264.5mm 2 The punching piece away from the center plane A is the second punching piece 210. The cross-sectional area of the first second punching piece 210 is S1 = 1018.3 mm 2 , satisfying S0>S1. The one farther away is marked as the second second punching piece 210 in sequence, and the cross section of the second second punching piece 210 is S2=1000mm 2 , satisfying S0>S2. Along the circumferential direction of the stator core 10, the width of the tooth body 410 of the first punching sheet 100 is t0, the width of the tooth body 410 of the first second punching sheet 210 is t1, and the width of the tooth body 410 of the i-th second punching sheet 210 is ti. Along the radial direction of the stator core 10, the width of the yoke 300 of the first punching sheet 100 is h0, the width of the yoke 300 of the first second punching sheet 210 is h1, and the width of the yoke 300 of the i-th second punching sheet 210 is hi. Among them, 0.7≤t1 / t0≤0.85, 0.7≤h1 / h0≤0.85. Similarly, 0.7≤ti / t0≤0.85, 0.7≤hi / h0≤0.85. Along the axial direction of the stator core 10, the thickness of the first punching sheet 100 is d0, the thickness of one punching sheet group 200 is the sum of d11 and d21, the thickness of the other punching sheet group 200 is the sum of d12 and d22, and the total thickness of the two punching sheet groups 200 is d1, where 0.1×d0≤d1≤0.3×d0.

[0196] Table 1 is a data table showing the changes in saturation current, resistance and copper loss with changes in ti / t0 of the present application, and Table 2 is a data table showing the changes in motor efficiency with changes in d1 / d0 of the present application.

[0197] Table 1

[0198] ti / t0 Saturation current (A) Resistance (Ω) Copper loss (W) 0.4 240 0.00454 261.504 0.5 200 0.00654 261.6 0.6 168 0.00854 241.03296 0.7 125 0.01054 164.6875 0.8 112 0.01254 157.30176 0.9 102 0.01454 151.27416 1 100 0.01654 165.4

[0199] Figure 7 The saturation current and copper loss of the motor 80 of the present application change with the change of ti / t0. ti / t0=1 is the original example (ie, the motor in the related art). Figure 7 It can be seen that when the ratio ti / t0 is less than 0.7, the saturation current increases in a quadratic manner, and the copper loss of the motor 80 also increases accordingly. The optimal range of the ratio ti / t0 is 0.7 to 0.85.

[0200] Figure 8The following table shows the law of the change of the efficiency of the motor 80 of the present application with the change of d1 / d0. Among them, d1 / d0=0 is the original example (ie, the motor in the related art). Figure 8 It can be seen that when the ratio d1 / d0 is between 0.1 and 0.3, the efficiency of the motor 80 is optimal.

[0201] Table 2

[0202] d1 / d0 Motor efficiency (%) 0 83 0.05 84 0.1 86 0.15 88 0.2 88.5 0.25 87 0.3 86 0.35 82 0.4 76

[0203] In this application, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integrally connected; and "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0204] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A stator, characterized in that: The stator core comprises: First processing; Two punching sheet groups, wherein the first punching sheet is located between the two punching sheet groups, and the punching sheet group includes n second punching sheets; The first punching sheet and the second punching sheet each include: a yoke, wherein the yoke is an annular structure; a plurality of teeth, each comprising a tooth body and a tooth shoe, wherein the tooth body is connected between the inner peripheral wall of the yoke and the tooth shoe, and the plurality of teeth are arranged at intervals along the circumferential direction of the stator core; Along the circumferential direction of the stator core, the width of the tooth body of the first punching sheet is recorded as t0, and the width of the tooth body of the i-th second punching sheet is recorded as ti; Along the axial direction of the stator core, the thickness of the first punching sheet is recorded as d0, and the total thickness of the two punching sheet groups is recorded as d1; Among them, 0.7≤ti / t0≤0.85, 0.1×d0≤d1≤0.3×d0, i and n are both positive integers, i≤n, n≥1.

2. The stator according to claim 1, characterized in that Along the radial direction of the stator core, the width of the yoke of the first punching sheet is recorded as h0, and the width of the yoke of the i-th second punching sheet is recorded as hi; Among them, hi<h0.

3. The stator according to claim 2, characterized in that hi and h0 satisfy: 0.7≤hi / h0≤0.

85.

4. The stator according to any one of claims 1 to 3, characterized in that The stator core is sectioned along an axial direction perpendicular to the stator core, and the cross-sectional area of the first punching sheet is recorded as S0, and the cross-sectional area of the i-th second punching sheet is recorded as Si, where S0>Si.

5. The stator according to claim 4, characterized in that When n>1, the cross-sectional areas of the n second punching sheets gradually decrease along the first punching sheet to the punching sheet group.

6. The stator according to any one of claims 1 to 3, characterized in that: Along the first punching sheet to the punching sheet group, the thickness of the i-th second punching sheet of one punching sheet group is recorded as di1, and the thickness of the i-th second punching sheet of another punching sheet group is recorded as di2; Among them, 0.8≤di1 / di2≤1.

2.

7. The stator according to claim 2 or 3, characterized in that: The yoke of the punching sheet group, the two adjacent teeth of the punching sheet group and the axial end surface of the first punching sheet enclose a recessed groove; The stator further includes an insulating frame, which is arranged at an end of the stator core along the axial direction of the stator, and a portion of the insulating frame is clamped in the sink; The winding is wound around the stator core through the insulating frame.

8. A motor, characterized in that: include: rotor; And the stator according to any one of claims 1 to 7, wherein the stator core is arranged around the outside of the rotor, and the rotor is rotatable relative to the stator.

9. The motor according to claim 8, characterized in that Two adjacent teeth of the stator and the yoke form a stator slot, the number of the stator slots is denoted as Z, and the number of poles of the motor is denoted as P; Among them, Z / P=3 / 2, or Z / P=6 / 5.

10. A pump body, characterized in that: include: A motor as claimed in claim 8 or 9.

11. A vehicle, characterized in that: include: The motor according to claim 8 or 9; or The pump body according to claim 10.

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