Stator lamination, stator core, electric machine, pump and vehicle

Abstract

The application discloses a kind of stator lamination, stator core, motor, pump and vehicle, the stator lamination is sheet and includes: stator yoke and stator tooth portion;Stator yoke is annular, the outside edge of stator yoke is formed with first gap and second gap, first gap is used to position stator core, in the plurality of stator lamination of stator core, at least part of the second gap of stator lamination is used to pass through and set ground pin, first gap and second gap are arranged in the circumferential direction of stator yoke interval;Stator tooth portion is connected with the radial inner side edge of stator yoke at one end and extends radially inward at the other end, and stator tooth portion includes multiple, multiple stator tooth portion is arranged in the circumferential direction of stator yoke evenly interval.According to the stator lamination of the application, by setting first gap and second gap, the positioning of insulating frame and the placement space for ground pin can be provided without increasing parts.

Description

Technical Field

[0001] This invention relates to the field of electric motor technology, and in particular to a stator lamination, a stator core, an electric motor, a pump, and a vehicle. Background Technology

[0002] Currently, with the rapid development of society, electric motors can generate driving torque and serve as a power source for electrical appliances or various machines, thus gaining more and more attention and developing towards high power density and high speed. At present, for motors with strong safety performance, the positioning between the insulation frame and the stator core is difficult, often requiring the addition of special components for positioning the insulation frame and the stator core; the poor electromagnetic compatibility performance of motors means that the voltage in the stator core cannot be released in time, affecting the normal operation of the motor. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a stator lamination that, by providing a first notch and a second notch, can achieve positioning of the insulation frame and provide placement space for the grounding pin without adding any components.

[0004] The present invention also proposes a stator core having the above-mentioned stator laminations.

[0005] The present invention also proposes a motor having the above-mentioned stator core.

[0006] The present invention also proposes a pump having the above-mentioned motor.

[0007] The present invention also proposes a vehicle having the above-mentioned motor.

[0008] According to a first aspect of the present invention, the stator lamination is sheet-shaped and includes: a stator yoke portion, the stator yoke portion being annular, the outer edge of the stator yoke portion having a first notch and a second notch, the first notch being used to position the stator core, and in a plurality of the stator laminations of the stator core, at least a portion of the second notch of the stator laminations being used to pass through a grounding pin, the first notch and the second notch being circumferentially spaced apart in the stator yoke portion; and a stator tooth portion, one end of the stator tooth portion being connected to the radially inner edge of the stator yoke portion and the other end extending radially inward, the stator tooth portion including a plurality of teeth portions being evenly spaced apart in the circumferential direction of the stator yoke portion.

[0009] According to the stator lamination of the present invention, without adding any components, the positioning of the insulating frame and the stator core is achieved by providing a first notch on the stator yoke, and a second notch is provided on the stator yoke to provide space for the grounding pin, thereby effectively solving the problem of electromagnetic compatibility of the motor. At the same time, it can reduce the weight of the motor to a certain extent and lower production costs.

[0010] In some embodiments, the first notch includes at least one, the second notch includes at least one, and the stator lamination satisfies: Where Z is the number of teeth in the stator lamination, i.e., the number of stator teeth; w1 is the width of the first notch, b1 is the maximum depth of the first notch in the radial direction of the stator lamination; w2 is the width of the second notch, b2 is the maximum depth of the second notch in the radial direction of the stator lamination; R os N1 is the outer radius of the stator yoke, and bsy is the width of the stator yoke in the radial direction; N1 is the number of the first notches, and N2 is the number of the second notches.

[0011] In some embodiments, the stator laminations further satisfy the following:

[0012] In some embodiments, the width w1 of the first notch satisfies: And / or, the width w2 of the second notch satisfies: Among them, R os Z is the outer radius of the stator yoke, and Z is the number of stator teeth.

[0013] In some embodiments, the maximum depth b1 of the first notch satisfies: And / or, the maximum depth b2 of the second notch satisfies: Wherein, bst is the width of the stator yoke in the radial direction.

[0014] In some embodiments, the angle α between the centerline of the first notch and the centerline of the second notch satisfies: Where Z is the number of stator teeth.

[0015] In some embodiments, the stator laminations are provided with connecting portions, which are formed at the connection positions of the stator yoke and the stator teeth, and are used to connect two adjacent stator laminations of the stator core.

[0016] In some embodiments, the connecting portion includes a plurality of connecting portions, each corresponding to a plurality of stator teeth, or the number of connecting portions is half the number of stator teeth.

[0017] In some embodiments, the connecting portion is formed as a rivet groove recessed from one side surface of the stator lamination toward the other side surface.

[0018] In some embodiments, the distance R3 between the connecting portion and the center point of the stator lamination satisfies: Among them, Ros R is the outer radius of the stator yoke. is Let be the inner edge radius of the stator lamination, and let be the width of the stator yoke in the radial direction.

[0019] In some embodiments, the stator lamination satisfies: R1>R3, and / or R2>R3, where R1 is the distance between the first notch and the center point of the stator lamination, R2 is the distance between the second notch and the center point of the stator lamination, and R3 is the distance between the connecting portion and the center point of the stator lamination.

[0020] In some embodiments, in a projection plane perpendicular to the axis of the stator core, the groove wall of either the first notch or the second notch includes at least one arc segment, or the groove wall of either the first notch or the second notch includes multiple straight segments, or the groove wall of either the first notch or the second notch includes at least one arc segment and at least one straight segment.

[0021] According to a second aspect of the present invention, a stator core includes a plurality of stator laminations stacked in the thickness direction, wherein the stator laminations are stator laminations according to a first aspect of the present invention.

[0022] According to the stator core of the present invention, by providing the stator laminations described in the first aspect, the overall performance of the stator core is improved.

[0023] According to a third aspect of the present invention, an electric motor includes: a stator assembly comprising a stator core according to a second aspect of the present invention; and a rotor assembly rotatably disposed radially inside the stator core.

[0024] According to the present invention, the overall performance of the motor is improved by providing the stator core described in the second aspect.

[0025] In some embodiments, the rotor assembly includes a rotor core, a permanent magnet, and a plastic-coated component. The permanent magnet is disposed on the rotor core, and the plastic-coated component covers the radially outer side of the rotor core and the permanent magnet. The motor satisfies the following: Where h is the thickness of the plastic-coated component in the radial direction of the rotor core, lg is the air gap between the plastic-coated component and the stator core, i.e., the distance between the plastic-coated component and the stator core in the radial direction, and R is The inner radius of the stator lamination is denoted as .

[0026] In some embodiments, along the axial direction of the stator core, the first notches of a plurality of stator laminations are aligned to form a positioning groove, and the second notches of a plurality of stator laminations are aligned to form a pin slot. The motor further includes: an insulating frame, the insulating frame being sleeved on the radially outer side of the stator core, the insulating frame having a positioning protrusion that engages within the positioning groove; and a grounding pin, one end of which is inserted into the pin slot from one axial end of the stator core, wherein the depth a of the grounding pin inserted into the pin slot and the total depth b of the pin slot satisfy: 0.3b ≤ a ≤ 0.7b.

[0027] The pump according to a fourth aspect of the invention includes the motor according to the third aspect of the invention.

[0028] According to the pump of the present invention, by providing the motor described in the third aspect above, the overall performance of the pump is improved.

[0029] The vehicle according to the fifth aspect of the present invention includes the motor of the embodiment of the third aspect of the present invention.

[0030] According to the present invention, by providing the motor described in the third aspect, the overall performance of the vehicle is improved.

[0031] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of an embodiment of a stator lamination according to the present invention, wherein a first notch and a second notch are provided at intervals along the edge of the stator lamination;

[0033] Figure 2 This is a schematic diagram of another embodiment of the stator lamination according to the present invention, wherein the stator lamination has three first notches and two second notches spaced apart along its edge;

[0034] Figure 3 This is a schematic diagram of an embodiment of an electric motor according to the present invention (with built-in permanent magnet);

[0035] Figure 4 This is a schematic diagram of another embodiment of the motor according to the present invention (surface-mounted permanent magnet);

[0036] Figure 5 Stator lamination T under different first and second notches ave * and T ripple * A trend graph showing how X changes with the value of X, where X is...

[0037] Figure 6 This is a schematic diagram of a vehicle according to the present invention.

[0038] Figure label:

[0039] 100. Stator laminations;

[0040] 110. Stator yoke; 111. First notch; 112. Second notch;

[0041] 120. Stator teeth;

[0042] 130. Connecting part;

[0043] 210. Rotor core;

[0044] 220. Permanent magnet;

[0045] 230. Plastic-coated parts;

[0046] 1000, Electric motor;

[0047] 10000, vehicles. Detailed Implementation

[0048] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0049] The following is for reference. Figures 1 to 6 A stator lamination 100 according to a first aspect embodiment of the present invention is described.

[0050] like Figure 1 As shown, according to a first aspect embodiment of the present invention, the stator lamination 100 is sheet-shaped and includes: a stator yoke portion 110 and a stator tooth portion 120.

[0051] Specifically, the stator yoke 110 is annular, for example, the stator yoke 110 is formed into a circular shape, and the outer edge of the stator yoke 110 is formed with a first notch 111 and a second notch 112. The first notch 111 is used to position the stator core, so that the stator core can be positioned when assembling the stator core without adding any parts.

[0052] In a plurality of stator laminations 100 of the stator core, at least a portion of the stator laminations 100 have a second notch 112 for passing a grounding pin, thereby providing space for the grounding pin by providing a second notch 112 on the stator core. The first notch 111 and the second notch 112 are circumferentially spaced in the stator yoke 110; one end of the stator tooth 120 (e.g., the outer radial end of the stator tooth 120 in the stator lamination) is connected to the radial inner edge of the stator yoke 110 and the other end (e.g., the inner radial end of the stator tooth 120 in the stator lamination) extends radially inward, and the stator tooth 120 includes a plurality of such teeth, which are evenly spaced in the circumferential direction of the stator yoke 110.

[0053] It should be noted that the stator core is formed by stacking multiple stator laminations 100 in the thickness direction. An insulating frame is fitted on the outside of the stator core. The insulating frame has a protrusion that matches the first notch 111. When the stator core is assembled with the insulating frame, the first notch 111 on the stator lamination 100 and the protrusion on the insulating frame can be used to quickly position the stator core and the insulating frame, thereby improving assembly efficiency.

[0054] During operation, if the stator core of motor 1000 is not grounded, a floating voltage to ground will form, causing intermittent breakdown discharge. Grounding the stator core eliminates the possibility of floating potential, effectively resolving the electromagnetic compatibility (EMC) issue of motor 1000. Existing motors 1000 typically address this issue by adding a dedicated component for housing the grounding pin. This application, however, solves the problem by providing a space for the grounding pin on the stator laminations. The second notches of multiple stacked stator laminations can cooperate to form a receiving groove for installing and placing the grounding pin, effectively solving the problem of providing space for the grounding pin and thus effectively resolving the EMC issue of motor 1000.

[0055] According to the stator lamination 100 of the present invention, without adding any components, the positioning of the insulating frame and the stator core is achieved by providing a first notch 111 on the stator yoke 110, and a second notch 112 is provided on the stator yoke 110 to provide space for the grounding pin, thereby effectively solving the electromagnetic compatibility problem of the motor 1000. At the same time, it can reduce the weight of the motor 1000 to a certain extent and lower production costs.

[0056] In one embodiment of the present invention, the stator lamination 100 satisfies:

[0057]

[0058] Where Z is the number of teeth in the stator lamination 100, i.e., the number of stator teeth 120; w1 is the width of the first notch 111; b1 is the maximum depth of the first notch 111 in the radial direction of the stator lamination 100; w2 is the width of the second notch 112; b2 is the maximum depth of the second notch 112 in the radial direction of the stator lamination 100; R os Let be the outer radius of the stator yoke 110, and bsy be the width of the stator yoke 110 in the radial direction. According to the inventor's extensive experiments, the stator laminations that satisfy the above inequality conditions can ensure that the motor 1000 has a high-quality output torque, low torque pulsation, stable operation, and superior performance.

[0059] It is understandable that in the above inequality, the denominator of the intermediate term is the area of ​​the annulus of the stator yoke 110 (including the areas of the first notch 111 and the second notch 112), Z is the number of teeth of the stator lamination 100, w1×b1 is the approximate area of ​​the first notch 111, which is not less than the actual area of ​​the first notch 111; w2×b2 is the approximate area of ​​the second notch 112, which is not less than the actual area of ​​the second notch 112. Therefore, the overall meaning of the brackets in the above inequality is the sum of the approximate areas of the first notch 111 and the second notch 112. The intermediate term of the above inequality represents the ratio of the product of the sum of the approximate volumes of the first notch 111 and the second notch 112 and the number of teeth of the stator lamination 100 to the volume of the annulus of the stator yoke 110.

[0060] Preferably, the stator lamination 100 further satisfies:

[0061]

[0062] Thus, under the condition of satisfying the above inequality, the stator lamination 100 can ensure that the output torque of the motor 1000 is high while the torque pulsation is low, the motor 1000 runs more stably, and the performance of the motor 1000 is superior.

[0063] In one embodiment of the present invention, the first notch 111 includes at least one, the second notch 112 includes at least one, and the stator lamination 100 satisfies:

[0064]

[0065] Where Z represents the number of teeth on the stator lamination 100, i.e., the number of stator teeth 120, for example... Figure 1 The stator lamination shown has 6 teeth; w1 is the width of the first notch 111, and b1 is the maximum depth of the first notch 111 in the radial direction of the stator lamination 100; w2 is the width of the second notch 112, and b2 is the maximum depth of the second notch 112 in the radial direction of the stator lamination 100; Ros Where is the outer radius of the stator yoke 110, bsy is the width of the stator yoke 110 in the radial direction; N1 is the number of first notches 111, and N2 is the number of second notches 112. Based on extensive experiments conducted by the inventors, stator laminations satisfying the above inequality conditions can ensure that the motor 1000 has high-quality output torque with low torque ripple, stable operation, and superior performance.

[0066] Furthermore, multiple first notches 111 and multiple second notches 112 can be provided. By providing multiple first notches 111, the positioning between the stator core and the insulation frame can be more accurate. By providing multiple second notches 112, multiple spaces can be provided on the stator core to place grounding pins, effectively solving the electromagnetic compatibility problem of motor 1000.

[0067] Understandably, in the above inequality, the denominator of the intermediate term is the area of ​​the annulus of the specified sub-yoke 110 (including the area of ​​multiple first notches 111 and multiple second notches 112), Z is the number of teeth of the specified sub-punch 100, and w1 i ×b1 i w2 represents the approximate area of ​​the i-th first gap 111, and this approximate area is not less than the actual area of ​​the i-th first gap 111; j ×b2 j Let be the approximate area of ​​the j-th second notch 112. This approximate area is not less than the actual area of ​​the j-th second notch 112. Therefore, the overall practical meaning of the brackets in the above inequality is the sum of the approximate areas of the multiple first notches 111 and the multiple second notches 112. The intermediate term of the above inequality represents the ratio of the sum of the approximate volumes of the multiple first notches 111 and the multiple second notches 112 to the product of the number of teeth of the stator lamination 100 and the volume of the annulus of the stator yoke 110.

[0068] Reference Figure 6 Taking a case with only one first gap 111 and one second gap 112 as an example, Let it be X. Figure 6 The horizontal axis in the figure represents the value of X; the product of the circumferential width and radial length b of the first notch 111 and the second notch 112 (w1×b1+w2×b2) is denoted as s. The changes in the average torque and torque ripple of motor 1000 under different values ​​of s are studied, such as... Figure 5 As shown, with The baseline for comparison is s = X = 0. In the diagram, T... ave *(subscript ave stands for average) and T ripple *(subscript ripple, indicating pulsation or fluctuation) represents the per-unit value, T ave * represents the ratio of the average torque under different values ​​of X to the average torque when X = 0, Tripple *Ratio of torque ripple at different X values to torque ripple at X = 0. When 0 < X ≤ 0.4, T ave *is greater than 0.9, T ripple *is smaller; when 0.4 < X < 1, as X increases, T ave *shows a downward trend, and T ripple *also shows an upward trend. Therefore, when 0 < X ≤ 0.4, the electromagnetic performance of the motor 1000 is better.

[0069] Preferably, the stator punching sheet 100 further satisfies:

[0070]

[0071] In this way, the stator punching sheet 100 under the condition of satisfying the above inequalities can ensure that when the output torque of the motor 1000 is relatively high, the torque ripple is relatively low, the motor 1000 operates more stably, and the performance of the motor 1000 is more excellent.

[0072] It can be understood that referring to the above inequalities, the proportion of the volume of the first notch 111 and the second notch 112 on the stator yoke 110 is within a certain range. The larger the proportion, the higher the torque ripple of the motor 1000, the more unstable the motor 1000 operates during operation, and the worse the output torque quality of the motor 1000. Under the condition of the inequalities satisfied by the preferably stator punching sheet 100, the first notch 111 and the second notch 112 on the stator yoke 110 have less influence on the torque ripple of the motor 1000. Thus, to ensure the stable operation of the motor 1000, the first notch 111 is provided on the stator punching sheet 100 to position the stator core, and the second notch 112 is provided on the stator punching sheet 100 to provide a placement space for the grounding pin.

[0073] In an embodiment of the present invention, referring to Figure 1 , the width w1 of the first notch 111 satisfies: Where, R os is the outer edge radius of the stator yoke 110, and Z is the number of stator tooth parts 120. In the above inequality is the outer edge circumference of the stator yoke 110 divided by the number of stator tooth parts 120, that is, the arc length of the outer edge of the stator yoke 110 between two adjacent stator tooth parts 120. That is to say, the width of the first notch 111 is not greater than the arc length of the outer edge of the stator yoke 110 between two adjacent stator tooth parts 120. In this way, it can be avoided that the first notch 111 occupies too much space of the stator yoke 110 and affects the stability of the stator punching sheet 100 during operation.

[0074] Furthermore, the width w2 of the second notch 112 satisfies Ros Let Z be the outer radius of the stator yoke 110, and Z be the number of stator teeth 120. In the above inequality... The outer perimeter of the stator yoke 110 is divided by the number of stator teeth 120. This refers to the arc length of the outer edge of the stator yoke 110 between two adjacent stator teeth 120. In other words, the width of the second notch 112 is not greater than the arc length of the outer edge of the stator yoke 110 between two adjacent stator teeth 120. This avoids the second notch 112 occupying too much space in the stator yoke 110 between the stator teeth 120, which could affect the stability of the stator lamination 100 during operation.

[0075] In one embodiment of the present invention, reference is made to... Figure 1 The maximum depth b1 of the first gap 111 satisfies: Where bsy is the width of the stator yoke 110 in the radial direction. That is, the maximum depth of the first notch 111 cannot exceed half the width of the stator yoke 110 in the radial direction. Furthermore, the maximum depth b1 of the first notch 111 can also satisfy... This avoids the first notch 111 occupying too much space in the stator yoke 110, thus preventing it from affecting the stability of the stator lamination 100 during operation.

[0076] Furthermore, the maximum depth b2 of the second gap 112 satisfies: Where bsy is the width of the stator yoke 110 in the radial direction. That is, the maximum depth of the second notch 112 cannot exceed half the width of the stator yoke 110 in the radial direction. Furthermore, the maximum depth b2 of the second notch 112 can also satisfy: This avoids the second notch 112 occupying too much space in the stator yoke 110, thus preventing it from affecting the stability of the stator lamination 100 during operation.

[0077] In one embodiment of the present invention, reference is made to... Figure 1 The angle α between the centerline of the first gap 111 and the centerline of the second gap 112 satisfies: Where Z represents the number of stator teeth 120. That is to say, the included angle between the first notch 111 and the second notch 112 should not be less than the arc between two adjacent stator teeth 120. In this way, the phenomenon of partial overlap between the first notch 111 and the second notch 112 can be avoided, which would affect the first notch 111 and the second notch 112 from performing their respective functions.

[0078] It should be noted that the center line of the first notch 111 refers to the line connecting the midpoint of the slot width of the first notch 111 to the center of the stator yoke 110, and the center line of the second notch 112 refers to the line connecting the midpoint of the slot width of the second notch 112 to the center of the stator yoke 110. If the angle between the center lines of the first notch 112 and the second notch 112 is too small, it will cause the first notch 112 and the second notch 112 to partially overlap. In this case, the second notch 112 will affect the positioning effect of the first notch 111 on the stator core and the insulation frame. At the same time, the first notch 111 will occupy the space of the second notch 112 for placing the grounding pin.

[0079] In one embodiment of the present invention, reference is made to... Figure 2 The stator lamination 100 is provided with a connecting portion 130, which is formed at the connection position between the stator yoke portion 110 and the stator tooth portion 120. The connecting portion 130 is used to connect two adjacent stator laminations 100 of the stator core. In this way, the connection between two adjacent stator laminations 100 is realized. For example, two adjacent stator laminations 100 can be connected by snapping together through two connecting portions 130.

[0080] It should be noted that in existing systems, adjacent stator laminations 100 are mostly connected by welding, which is a complex and costly process. Therefore, by providing a connecting portion 130 on the stator lamination 100, the connection between adjacent stator laminations 100 can be achieved.

[0081] In one embodiment of the present invention, reference is made to... Figure 1 The connecting portion 130 may include multiple portions, each corresponding to one of the multiple stator teeth 120, or the number of connecting portions 130 is half the number of stator teeth 120. In this way, by providing multiple connecting portions 130 on the stator lamination 100, the stability of the connection between two adjacent stator laminations 100 can be further guaranteed.

[0082] For example, refer to Figure 2 Multiple connecting portions 130 correspond one-to-one with multiple stator teeth 120. In this way, during the process of connecting two adjacent stator laminations 100 in the thickness direction, the stability of the connection between the two adjacent stator laminations 100 is ensured by the multiple connecting portions 130 evenly arranged in the circumferential direction of the stator yoke 110, thereby ensuring the stability of the stator core composed of stacked stator laminations 100.

[0083] In one embodiment of the present invention, reference is made to... Figure 2The connecting portion 130 is formed as a rivet groove recessed from one side surface of the stator lamination 100 to the other side surface. It should be noted that the rivet groove is formed by a stamping process. The rivet groove is recessed on one side surface of the stator lamination 100 and protrudes on the other side surface of the stator lamination 100. In this way, two adjacent stator laminations 100 are connected by the rivet groove, which saves costs.

[0084] In the specific assembly process of the stator core, the first notch 111 and the second notch 112 are aligned in the thickness direction of the stator lamination 100. Then, a certain pressure is applied to the stator lamination 100 in the thickness direction, so that the rivet groove of one of the two adjacent stator laminations 100 is engaged in the rivet groove of the other stator lamination 100, thereby connecting the two adjacent stator laminations 100 and saving costs.

[0085] In one embodiment of the present invention, reference is made to... Figure 1 The distance R3 between the connecting part 130 and the center point of the stator lamination 100 satisfies: Among them, R os R is the outer radius of the stator yoke 110. is Here, is the inner edge radius of the stator lamination 100, and is the width of the stator yoke 110 in the radial direction. That is, the connecting portion 130 can be provided on the stator tooth portion 120 and the stator yoke portion 110.

[0086] It should be noted that the distance between the center point of the connecting portion 130 and the center point of the stator lamination 100 refers to the distance between the center point of the stator lamination 100 and the outermost radial end of the connecting portion 130 located on the stator lamination 100. The inequality mentioned above... This ensures that the distance between the connecting part 130 and the stator tooth part 120 facing the center end of the stator lamination 100 is not less than Since the connecting part 130 has a certain length in the radial direction of the stator lamination 100, this avoids the connecting part 130 being located at the end of the stator tooth 120 facing the stator lamination 100, and there is a certain distance between the connecting part 130 and the end of the stator tooth 120 facing the stator lamination 100, which would affect the normal use of the stator lamination 100. At the same time, the greater the distance between the connecting part 130 and the center point of the stator lamination 100, the higher the stability of the connection between the two adjacent stator laminations 100 connected by the connecting part 130.

[0087] In the above inequality, R3≤R os -bsy / 4 can ensure that the connecting part 130 does not overlap with the first notch 111 or the second notch 112 at the radial outer end of the stator lamination 100, thus affecting the normal use of the first notch 111 and the second notch 112.

[0088] In one embodiment of the present invention, reference is made to... Figure 2 The stator lamination 100 satisfies: R1 > R3, where R1 is the distance between the center point of the first notch 111 and the center point of the stator lamination 100, and R3 is the distance between the center point of the connecting portion 130 and the center point of the stator lamination 100. This prevents a portion of the first notch 111 from overlapping with a portion of the connecting portion 130, thus avoiding interference with the normal use of both the first notch 111 and the connecting portion 130.

[0089] Furthermore, the stator lamination 100 satisfies: R2 > R3, where R2 is the distance between the center point of the second notch 112 and the center point of the stator lamination 100, and R3 is the distance between the center point of the connecting portion 130 and the center point of the stator lamination 100. This prevents a portion of the second notch 112 from overlapping with a portion of the connecting portion 130, thus avoiding interference with the normal use of both the second notch 112 and the connecting portion 130.

[0090] In one embodiment of the present invention, reference is made to... Figure 1 In the projection plane perpendicular to the axis of the stator core, the groove wall of either the first notch 111 or the second notch 112 includes at least one arc segment; or, the groove wall of either the first notch 111 or the second notch 112 includes multiple straight segments; or, the groove wall of either the first notch 111 or the second notch 112 includes at least one arc segment and at least one straight segment. The first notch 111 thus formed can be used to position the stator core and the insulation frame, and the second notch 112 can provide space for the grounding pin.

[0091] For example, the first gap 111 and the second gap 112 can be formed by a circular arc segment, forming an arc shape; the first gap 111 and the second gap 112 can also be formed by a circular arc segment and a straight line segment; the first gap 111 and the second gap 112 can also be formed by two straight line segments, forming a V shape; the first gap 111 and the second gap 112 can also be formed by three straight line segments, forming a trapezoid; the first gap 111 and the second gap 112 can also be formed by two straight line segments and a circular arc segment, forming a U shape.

[0092] Furthermore, the multiple first notches 111 can be formed into different shapes, which can improve the stability and accuracy of the positioning of the stator core and the insulation frame.

[0093] According to a second aspect of the present invention, a stator core includes a plurality of stator laminations 100 arranged in a thickness direction, wherein the stator laminations 100 are the stator laminations 100 of the first aspect of the present invention described above.

[0094] According to the embodiments of the present invention, the stator core improves the overall performance of the stator core by providing the stator laminations 100 of the first aspect embodiment described above.

[0095] According to a third aspect of the present invention, an electric motor 1000 includes a stator assembly and a rotor assembly.

[0096] Specifically, the stator assembly includes a stator core according to a second aspect embodiment of the present invention, and the rotor assembly is rotatably disposed on the radial inner side of the stator core.

[0097] According to an embodiment of the present invention, the motor 1000 improves its overall performance by providing the stator core described in the second aspect embodiment.

[0098] In one embodiment of the present invention, the rotor assembly includes a rotor core 210, a permanent magnet 220, and a plastic-coated component 230. The permanent magnet 220 is disposed on the rotor core, and the plastic-coated component 230 covers the radially outer side of the rotor core 210 and the permanent magnet 220. The motor 1000 satisfies the following conditions: Where h is the thickness of the plastic-coated part 230 in the radial direction of the rotor core, lg is the air gap between the plastic-coated part 230 and the stator core, that is, the distance between the plastic-coated part 230 and the stator core in the radial direction, and R is This is the inner radius of the stator lamination 100. This ensures that the air gap between the plastic-coated part 230 and the stator core is not too large, saving internal space in the motor 1000 and ensuring the stability of the rotor core during operation.

[0099] In one embodiment of the present invention, along the axial direction of the stator core, the first notches 111 of a plurality of stator laminations 100 are aligned to form a positioning groove, and the second notches 112 of the plurality of stator laminations 100 are aligned to form a pin slot. The motor may further include: an insulating frame and a grounding pin; the insulating frame is sleeved on the radially outer side of the stator core, and the insulating frame is provided with a positioning protrusion that fits into the positioning groove; one end of the grounding pin is inserted into the pin slot from one axial end of the stator core, and the depth a of the grounding pin inserted into the pin slot and the total depth b of the pin slot satisfy: 0.3b≤a≤0.7b. In this way, the positioning of the stator core and the insulating frame is achieved by the positioning groove on the stator core and the positioning protrusion on the insulating frame, and the pin slot on the stator core provides space for the grounding pin.

[0100] Furthermore, the depth 'a' of the grounding pin inserted into the pin slot can be set to 0.3b, 0.4b, 0.5b, 0.6b, and 0.7b according to the actual situation. For example, setting the depth 'a' of the grounding pin inserted into the pin slot to 0.5b can ensure that the grounding pin is stably inserted into the pin slot of the stator core, thus solving the problem of poor electromagnetic compatibility performance of the motor.

[0101] The pump according to the fourth aspect of the present invention includes the motor 1000 of the third aspect of the present invention.

[0102] According to the pump of the present invention, by providing the motor 1000 described in the third aspect above, the overall performance of the pump is improved.

[0103] The vehicle 10000 according to the fifth aspect of the present invention includes the motor 1000 of the third aspect of the present invention.

[0104] Here, refer to Figure 6 Vehicle 10000 can be a new energy vehicle. In some embodiments, the new energy vehicle can be a pure electric vehicle with the aforementioned motor 1000 as the main driving force. In other embodiments, the new energy vehicle can be a hybrid vehicle with both an internal combustion engine and motor 1000 as the main driving force. Regarding the internal combustion engine and motor 1000 mentioned in the above embodiments that provide driving force for the new energy vehicle, the internal combustion engine can use gasoline, diesel, hydrogen, etc. as fuel, and the way to provide electrical energy to the motor 1000 can be a power battery, hydrogen fuel cell, etc., without special limitation. It should be noted that this is merely an exemplary description of the structure of new energy vehicles, etc., and is not intended to limit the scope of protection of the present invention.

[0105] Furthermore, in some embodiments, the vehicle 10000 may also be a vehicle that uses the aforementioned third-party motor 1000 as its drive motor.

[0106] According to the present invention, the overall performance of the vehicle 10000 is improved by providing the motor 1000 described in the third aspect.

[0107] The following will refer to Figures 1-6 A motor 1000 according to a specific embodiment of the present invention is described.

[0108] Reference Figure 1 and Figure 3 According to a specific embodiment of the present invention, the motor 1000 may include a stator assembly and a rotor assembly.

[0109] The stator assembly includes a stator core according to a second aspect embodiment of the present invention. The stator core includes stator laminations 100 stacked in the thickness direction. The stator laminations 100 are stator laminations 100 according to a first aspect embodiment of the present invention. According to a specific embodiment of the present invention, the stator laminations 100 are sheet-shaped and may include: a stator yoke portion 110, a stator tooth portion 120, and a connecting portion 130.

[0110] The rotor assembly is rotatably disposed on the radially inner side of the stator core; the rotor assembly includes a rotor core 210, a permanent magnet 220, and a plastic-coated component 230. The permanent magnet 220 is disposed on the rotor core 210, and the plastic-coated component 230 covers the radially outer side of the rotor core 210 and the permanent magnet 220. The motor 1000 satisfies the following:

[0111] The stator yoke 110 is annular, and has a first notch 111 and a second notch 112. The first notch 111 is recessed radially inward from the outer radial edge of the stator yoke 110 and is suitable for positioning the stator core. The second notch 112 is recessed radially inward from the outer radial edge of the stator yoke 110 and is suitable for inserting a grounding pin. The first notch 111 and the second notch 112 are axially spaced apart from each other in the stator yoke 110. The first notch 111 is formed by an arc segment, and the second notch 112 is formed by the combination of three straight segments.

[0112] Stator lamination 100 satisfies: The width w1 of the first gap 111 satisfies: The width w2 of the second gap 112 satisfies: The maximum depth b1 of the first gap 111 satisfies: The maximum depth b2 of the second gap 112 satisfies: The angle α between the centerline of the first gap 111 and the centerline of the second gap 112 satisfies: R1>R3, 2>R3.

[0113] One end of the stator tooth 120 is connected to the radial inner edge of the stator yoke 110 and the other end extends radially inward. The stator tooth 120 includes a plurality of teeth, which are evenly spaced along the axial direction of the stator yoke 110.

[0114] A connecting portion 130 is formed at the connection position between the stator yoke portion 110 and the stator tooth portion 120. The connecting portion 130 is used to connect two adjacent stator laminations 100 of the stator core. Multiple connecting portions 130 are included, each corresponding to one of the multiple stator tooth portions 120. The connecting portion 130 is formed as a rivet groove recessed from one surface of the stator lamination 100 towards the other surface. The distance R3 between the connecting portion 130 and the center point of the stator lamination 100 satisfies:

[0115] Specifically, such as Figure 1 and Figure 3As shown, during the assembly of the motor 1000, the stator core is positioned to the insulating frame through the first notch 111. The second notch 112 on the stator lamination 100 is stacked in the thickness direction of the stator lamination 100 to form a space suitable for inserting the grounding pin. By reasonably setting the dimensions of the first notch 111 and the second notch 112 on the stator yoke 110 of the stator lamination 100, the grounding pin is inserted into the stator core under the premise of stable operation of the motor 1000 and without adding any parts, thus solving the problem of electromagnetic compatibility performance of the motor 1000.

[0116] According to the stator lamination 100 of the present invention, without adding any components, the positioning of the insulating frame and the stator core is achieved by providing a first notch 111 on the stator yoke 110, and a second notch 112 is provided on the stator yoke 110 to provide space for the grounding pin, thereby effectively solving the electromagnetic compatibility problem of the motor 1000. At the same time, it can reduce the weight of the motor 1000 to a certain extent and lower production costs.

[0117] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0118] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0119] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0120] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0121] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A stator lamination, characterized in that, The stator lamination is sheet-shaped and includes: The stator yoke is annular, and a first notch and a second notch are formed on the outer edge of the stator yoke. The first notch is used to position the stator core. In the plurality of stator laminations of the stator core, at least some of the second notches of the stator laminations are used to pass through a grounding pin. The first notch and the second notch are circumferentially spaced in the stator yoke. The stator teeth are provided, one end of which is connected to the radially inner edge of the stator yoke, and the other end extends radially inward. Multiple stator teeth are provided, and these teeth are evenly spaced along the circumference of the stator yoke. The first notch includes at least one, the second notch includes at least one, and the stator lamination satisfies: ， Where Z is the number of teeth of the stator lamination, that is, the number of stator teeth; Let be the width of the i-th first notch. The maximum depth of the i-th first notch in the radial direction of the stator lamination; The width of the j-th second notch The maximum depth of the j-th second notch in the radial direction of the stator lamination; The outer radius of the stator yoke is given. N1 is the width of the stator yoke in the radial direction; N2 is the number of the first notches and N1 is the number of the second notches.

2. The stator lamination according to claim 1, characterized in that, Width of the first notch satisfy: , and / or, the width of the second notch satisfy: .

3. The stator lamination according to claim 1, characterized in that, Maximum depth of the first gap satisfy: And / or, the maximum depth of the second notch satisfy: .

4. The stator lamination according to claim 1, characterized in that, The angle between the centerline of the first notch and the centerline of the second notch satisfy: .

5. The stator lamination according to any one of claims 1-4, characterized in that, The stator lamination is provided with a connecting portion, which is formed at the connection position between the stator yoke and the stator tooth, and is used to connect two adjacent stator laminations of the stator core.

6. The stator lamination according to claim 5, characterized in that, The connecting part includes multiple parts, and each of the multiple connecting parts corresponds one-to-one with a multiple of the stator teeth, or the number of the connecting parts is half the number of the stator teeth.

7. The stator lamination according to claim 5, characterized in that, The connecting portion is formed as a rivet groove recessed from one side surface of the stator lamination toward the other side surface.

8. The stator lamination according to claim 5, characterized in that, The distance between the connecting part and the center point of the stator lamination satisfy: ,in, The inner radius of the stator lamination is denoted as .

9. The stator lamination according to claim 5, characterized in that, The stator laminations satisfy the following: , and / or ,in, The distance between the first notch and the center point of the stator lamination. The distance between the second notch and the center point of the stator lamination. The distance between the connecting part and the center point of the stator lamination.

10. The stator lamination according to any one of claims 1-4, characterized in that, In a projection plane perpendicular to the axis of the stator core, the groove wall of either the first notch or the second notch includes at least one arc segment, or the groove wall of either the first notch or the second notch includes multiple straight segments, or the groove wall of either the first notch or the second notch includes at least one arc segment and at least one straight segment.

11. A stator core, characterized in that, It includes a plurality of stator laminations stacked in the thickness direction, wherein the stator laminations are stator laminations according to any one of claims 1-10.

12. An electric motor, characterized in that, include: A stator assembly comprising a stator core as claimed in claim 11; A rotor assembly, which is rotatably disposed on the radially inner side of the stator core.

13. The motor according to claim 12, characterized in that, The rotor assembly includes a rotor core, a permanent magnet, and a plastic-coated component. The permanent magnet is disposed on the rotor core, and the plastic-coated component covers the radially outer side of the rotor core and the permanent magnet. The motor satisfies the following: Where h is the thickness of the plastic-coated component in the radial direction of the rotor core, and lg is the air gap between the plastic-coated component and the stator core, i.e., the distance between the plastic-coated component and the stator core in the radial direction. The inner radius of the stator lamination is denoted as .

14. The motor according to claim 12, characterized in that, Along the axial direction of the stator core, the first notches of a plurality of stator laminations are aligned to form a positioning groove, and the second notches of a plurality of stator laminations are aligned to form a pin insertion groove. The motor further includes: An insulating frame is sleeved on the radially outer side of the stator core, and the insulating frame is provided with a positioning protrusion that fits into the positioning groove. A grounding pin, one end of which is inserted into the pin slot from one axial end of the stator core, wherein the depth a of the grounding pin inserted into the pin slot and the total depth b of the pin slot satisfy: 0.3b≤a≤0.7b.

15. A pump, characterized in that, Includes the motor according to any one of claims 12-14.

16. A vehicle, characterized in that, Includes the motor according to any one of claims 12-14.

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