WO2019227841A1 - Stator core, stator and motor - Google Patents

Abstract

Disclosed are a stator core (100), a stator (200) and a motor. The stator core (100) comprises a plurality of iron core sheets (1), the plurality of iron core sheets (1) are in stacked arrangement in an axial direction of the stator core (100), and each iron core sheet (1) is of an annular structure and comprises a plurality of sheet punching segments (11) successively arranged end to end in a circumferential direction; a seam (10) is formed between two adjacent sheet punching segments (11), and the seam (10) of the n layer and the seam (10) of the n+m layer are arranged in the axial direction of the stator core (100) in a staggered manner, where n and m are both positive integers, and n and m respectively satisfy n ≥ 1 and m ≥ 1; and the seam (10) is formed as a straight line segment.

Description

Stator core, stator and motor

Cross-reference to related applications

This application is based on a Chinese patent application with an application number of 201810551860.2, an application date of May 31, 2018, and a Chinese patent application with an application number of 201820841855.0, and an application date of May 31, 2018. Right, the entire content of the above-mentioned Chinese patent application is incorporated herein by reference.

Technical field

The present application relates to the technical field of motors, and in particular, to a stator core, a stator, and a motor.

Background technique

The divided core is a commonly used stator core structure, so that the stator core can open the winding space of the stator windings, so as to fill more copper wires in the stator slots of the stator core to improve the utilization of the stator slots, thereby Reduce the resistance of the stator windings, thereby improving the efficiency of the motor to save electrical energy.

In the related art, the structure of the stator core has the following problems: Because the silicon steel plate for manufacturing the stator core has the same plate difference, there will be an axial splicing error when the divided cores are manufactured. Interlayer eddy current conduction occurs at the splicing place, which increases the eddy current loss of the stator core, reduces the efficiency of the motor, and weakens the use effect of the divided core; the overall rigidity of the stator core is poor, which makes the stator core Large vibration and noise are generated during use, so the stator core is only suitable for the use of light-load motors such as fans, which limits the use of the stator core; the use of flat electromagnetic wire windings can further improve the utilization of the stator slots, however With the connection device on the divided iron core, flat electromagnetic wire winding cannot be used; the splicing process of the divided iron core is not conducive to automated production.

Summary of the Invention

This application aims to solve at least one of the technical problems existing in the prior art. For this reason, an object of the present application is to provide a stator core, which is convenient to process, has small eddy current loss, and has good rigidity.

Another object of the present application is to provide a stator having the above-mentioned stator core.

Another object of the present application is to provide a motor having the above-mentioned stator.

A stator core according to an embodiment of the first aspect of the present application includes: a plurality of iron chips, and the plurality of iron chips are stacked in an axial direction of the stator core, and each of the iron chips is formed into a ring structure and Including a plurality of punching segments arranged in sequence along the circumferential direction, forming a seam between two adjacent punching segments, along the axial direction of the stator core, the seam of the nth layer and the n + mth The seams of the layer are staggered, wherein the n and m are positive integers, and the n and m respectively satisfy n ≧ 1 and m ≧ 1, and the seams are formed as straight line segments.

According to the stator core of the embodiment of the present application, by staggering the joints of the nth layer and the joints of the n + mth layer, the axial splicing error of the iron chip can be reduced, and the punching sections of different layers can be avoided at the joints. The eddy current conduction phenomenon occurs between the layers, thereby reducing the eddy current loss of the stator core. At the same time, it avoids the detachment of the punched sections in different layers, which improves the overall rigidity of the stator core. When the stator core is applied to the motor, the efficiency of the motor can be improved, the vibration and noise of the motor can be effectively reduced, the applicability of the motor can be improved, and the user's experience effect can be improved. The structure of the segments facilitates the processing of punched segments and facilitates the connection of punched segments at the seams.

According to some embodiments of the present application, the stator iron core includes a plurality of divided iron cores arranged in turn along the circumferential direction, and each of the divided iron cores includes a plurality of laminated iron cores arranged in an axial direction of the stator iron core. Each of the punched segments, and each of the punched segments includes a yoke portion and a tooth portion connected in a radial direction of the stator core, and the yoke portion of each of the punched segments is located outside of the corresponding tooth portion A circumferential width of an outer end of the yoke portion is larger than a circumferential width of an inner end of the yoke portion.

According to some embodiments of the present application, in a cross section of the stator core, a projection between the projection of the seam of the nth layer and the projection of the seam of the n + mth layer The angle is α, the α satisfies: α ≠ 0 °, and an intersection point of a straight line where the projection of the seam of the nth layer and a straight line where the projection of the seam of the n + m layer is located Located inside the yoke.

According to some embodiments of the present application, the shape of the iron chip from the n-th layer to the n + b layer is the same along the axial direction of the stator core, where b is A positive integer, and b satisfies: b ≧ 1.

According to some embodiments of the present application, shapes of the punched segments from the n-th layer to the punched segments of the n + b layer are the same along the axial direction of the stator core.

According to some embodiments of the present application, a plurality of the iron chips are connected by a plurality of rivets.

According to some embodiments of the present application, a plurality of the rivets are provided one-to-one on the plurality of punching sections.

According to some embodiments of the present application, the minimum gap of the seam is x, and the x satisfies: x ≦ 0.02 mm.

According to some embodiments of the present application, the thickness of each punched segment is t, and t satisfies: t ≦ 0.5 mm.

A stator according to an embodiment of the second aspect of the present application includes a stator core according to the embodiment of the first aspect of the present application.

According to the stator of the embodiment of the present application, by using the stator core described above, the eddy current loss of the stator is reduced, and the overall rigidity of the stator is improved.

A motor according to an embodiment of the third aspect of the present application includes a stator according to the embodiment of the second aspect of the present application.

According to the motor of the embodiment of the present application, by using the above-mentioned stator, the efficiency of the motor can be effectively improved, the vibration and noise of the motor can be reduced, and the user's experience effect can be improved.

Additional aspects and advantages of the present application will be given in part in the following description, part of which will become apparent from the following description, or be learned through practice of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

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:

1 is a schematic structural diagram of a stator core according to an embodiment of the present application;

2 is an exploded view of the stator core shown in FIG. 1;

3 is a schematic assembly diagram of the divided iron core shown in FIG. 2;

4 is a schematic structural diagram of an n-th layer iron chip and an n + m-th layer iron chip of the stator core shown in FIG. 1;

5 is a schematic structural diagram of an n-th layer iron chip of the stator core shown in FIG. 4;

6 is a schematic structural diagram of an n + mth layer iron chip of the stator core shown in FIG. 4;

FIG. 7 is a schematic diagram of a structure in which the n-th layer iron chip of the stator core shown in FIG. 5 and the n + m-th layer iron chip of the stator core shown in FIG. 6 are stacked; FIG.

8 is a schematic structural diagram of a stator core according to another embodiment of the present application;

9 is a schematic diagram of a process of disassembling and assembling a stator core according to an embodiment of the present application;

10 is a schematic diagram of a process of disassembling and assembling a stator core according to another embodiment of the present application;

11 is a schematic diagram of eddy current loss of a stator core according to an embodiment of the present application;

FIG. 12 is a comparison diagram of eddy current loss of a stator core according to an embodiment of the present application and eddy current loss of a conventional stator core; FIG.

FIG. 13 is a comparison diagram of a radial vibration amplitude of a stator core motor and a radial vibration amplitude of a conventional stator core motor according to an embodiment of the present application; FIG.

FIG. 14 is a schematic structural diagram of a stator according to an embodiment of the present application.

Reference signs:

Stator 200, insulation assembly 101,

Stator core 100, rivet 100a, eddy current 100b,

Iron chip 1, seam 10, intersection 10a, punch section 11, stator slot 110, yoke 111, tooth 112,

Divided iron core 2.

Detailed ways

Hereinafter, embodiments of the present application are described in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and should not be construed as limiting the present application.

In the description of this application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Rear "," left "," right "," vertical "," horizontal "," top "," bottom "," inner "," outer "," axial "," radial "," circumferential " The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, The azimuth structure and operation cannot be understood as a limitation on this application. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, "a plurality" means two or more.

In the description of this application, it should be noted that the terms "installation", "connected", and "connected" should be understood in a broad sense, unless explicitly stated and limited otherwise. For example, they may be fixed connections or removable. Connection, or integral connection; it can be mechanical or electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

A stator core 100 according to an embodiment of the first aspect of the present application is described below with reference to FIGS. 1 to 13.

As shown in FIGS. 1 to 13, the stator core 100 according to the embodiment of the present application includes a plurality of core chips 1.

A plurality of iron chips 1 are stacked along the axial direction of the stator iron core 100. Each iron chip 1 is formed into a ring structure and each iron chip 1 includes a plurality of punching sections 11 arranged one after the other in the circumferential direction, two adjacent ones. A seam 10 is formed between the punching sections 11, and the seam 10 is formed as a straight line segment. The seam 10 of the nth layer and the seam 10 of the n + m layer are staggered along the axial direction of the stator core 100, where n And m are positive integers, and n and m satisfy n≥1 and m≥1, respectively.

For example, as shown in FIG. 1 to FIG. 13, the stator core 100 may be roughly formed into a cylindrical structure, and a plurality of iron chips 1 are sequentially stacked along the thickness direction of the iron chip 1, and each of the punching sections 11 may be substantially formed into an arc shape. Structure, a plurality of punching sections 11 are arranged in sequence along the circumferential direction of the iron chip 1, and two adjacent punching sections 11 may be arranged at intervals along the circumferential direction of the iron chip 1 so that two adjacent punching sections 11 are opposite to each other A seam 10 is formed between the two ends, and the edges of two opposite punching sections 11 adjacent to each other can be formed as straight line segments, so that the entire seam 10 can be formed as a straight line segment to simplify the structure of the punching segment 11. This facilitates the processing of the punched segments 11 and facilitates the connection of the punched segments 11 at the seams 10.

Among them, along the axial direction of the stator core 100, the seam 10 of the nth layer and the seam 10 of the n + m layer are staggered, so that the punched section 11 of the nth layer and the punched section 11 of the n + m layer can be staggered. Overlapping, the seams 10 of each layer of iron chips 1 can be located only in the corresponding layer, that is, the seam 10 of the nth layer will not extend into the n + 1th layer or the n-1th layer, reducing The axial splicing error of the iron chip 1 is prevented, and the interlayer eddy current conduction phenomenon at the joints 10 of the punching sections 11 of different layers is avoided, that is, the eddy current 100b of the punching section 11 of the nth layer is prevented from passing through the connection. The slit 10 flows to the punching segment 11 of the n + 1th layer or the punching segment 11 of the n-1th layer, thereby reducing the eddy current loss of the stator core 100. When the stator core 100 is applied to a motor, it can be improved The efficiency of the motor; at the same time, it avoids the detachment of the punching segments 11 in different layers, which improves the overall rigidity of the stator core 100. When the stator core 100 is applied to the motor, it can effectively reduce the vibration and noise of the motor and improve The applicability of the motor improves the user experience.

Here, it should be noted that the “staggered setting” means that the projection of the seam 10 of the n-th layer and the projection of the seam 10 of the n + m layer do not completely overlap on the cross section of the stator core 100, that is, That is, on the cross section of the stator core 100, the projection of the seam 10 of the n-th layer and the projection of the seam 10 of the n + m layer may not be completely overlapped, or may be partially overlapped and the other is not overlapped; “The seam 10 is formed as a straight line segment” may mean that the entire seam 10 is formed as a straight line segment.

According to the stator core 100 in the embodiment of the present application, by staggering the seam 10 of the nth layer and the seam 10 of the n + mth layer, the axial splicing error of the iron chip 1 can be reduced, and the impact of different layers can be avoided. The eddy current conduction phenomenon between the segments 11 occurs at the joint 10, thereby reducing the eddy current loss of the stator core 100; at the same time, avoiding the detachment of the punched segments 11 of different layers easily, and improving the overall rigidity of the stator core 100 , Which facilitates the transportation and circulation of the stator core 100. When the stator core 100 is applied to a motor, the efficiency of the motor can be improved, the vibration and noise of the motor can be effectively reduced, the applicability of the motor can be improved, and the user's experience effect can be improved. By setting the joint 10 as a straight line segment, it is simplified The structure of the punching segment 11 is facilitated, thereby facilitating the processing of the punching segment 11 and the connection of the punching segment 11 at the seam 10.

In some embodiments of the present application, the stator core 100 includes a plurality of divided cores 2 arranged in sequence along the circumferential direction, and each of the divided cores 2 includes a plurality of laminated cores arranged along the axial direction of the stator core 100. The punching segments 11 each include a yoke portion 111 and a tooth portion 112 that are connected along the radial direction of the stator core 100. The yoke portion 111 of each punching portion 11 is located outside the corresponding tooth portion 112. The circumferential width of the outer end is larger than the circumferential width of the inner end of the yoke portion 111. For example, as shown in FIG. 1 to FIG. 8, a plurality of punched segments 11 are sequentially stacked along the thickness direction of the punched segments 11 to form a divided core 2, and the plurality of divided cores 2 are aligned along the circumferential direction of the stator core 100 The yoke portion 111 and the tooth portion 112 are arranged inward and outward along the radial direction of the punching section 11, and the width of the yoke portion 111 may be larger than the width of the tooth portion 112 in the circumferential direction of the stator core 100, and two adjacent tooth portions 112 A stator slot 110 is defined therebetween. Therefore, the plurality of divided cores 2 can be moved in the circumferential direction and / or the radial direction of the stator core 100, so that the stator core 100 can be divided into a plurality of divided cores 2. At this time, each of the divided cores 2 The core 2 is a separate structure, and there is no connection structure between any two divided iron cores 2, which makes the divided iron core 2 have a higher degree of freedom and is convenient for winding around the divided iron core 2. Wire, which is conducive to the automated production of the stator core 100. For example, the divided core 2 can realize rotating winding, that is, it is compatible with the manufacture of flat electromagnetic wire winding coils, which improves the applicability of the stator core 100. When the divided core 2 After the winding is completed, the plurality of divided cores 2 can be spliced again into a complete stator core 100, thereby facilitating the manufacture of the stator 200.

Specifically, the tooth portion 112 of each punching segment 11 is connected to the inner end of the corresponding yoke portion 111. In the first direction, the width of the outer end of the yoke portion 111 is d2, the width of the inner end of the yoke portion 111 is d1, and d2> d1 , So that a plurality of divided cores 2 can be moved in the radial direction of the stator core 100 (for example, as shown in FIG. 9), so as to quickly split the stator core 100 into a plurality of divided cores 2, During the division process, the movement between two adjacent divided cores 2 does not interfere, and the independent movement of each divided core 2 is achieved. It moves along the radial direction of the stator core 100, which makes the operation consistency of multiple divided cores 2 high, which is conducive to automated production, facilitates the operation of related automated production equipment, facilitates the simplification of the structure of the automated production equipment, and reduces the cost. The first direction is the circumferential direction of the stator core 100. For example, in the examples of FIGS. 5 and 6, the first direction is perpendicular to the direction of the center line of the corresponding tooth portion 112.

In some specific embodiments of the present application, as shown in FIG. 8 and FIG. 10, on the cross section of the stator core 100, the projection of the seam 10 on the n-th layer and the projection of the seam 10 on the n + m-th layer. The angle between them is α, α satisfies: α ≠ 0 °, and the intersection point 10a of the line where the projection of the seam 10 of the nth layer and the line of the projection of the seam 10 of the n + m layer is located at the yoke Inside of 111, at this time, the intersection point 10a may be located in the corresponding stator slot 110, so that the overlapping area between the adjacent two divided cores 2 is larger, so that the adjacent two divided cores 2 are in the stator. The iron core 100 is not easy to detach in the axial direction. Only when the divided iron cores 2 have moved a sufficient distance can the two adjacent divided iron cores 2 be completely separated, thereby ensuring the strength of the stator iron core 100.

In some specific embodiments of the present application, the shape of the iron chip 1 from the nth layer to the n + b layer of the iron chip 1 along the axial direction of the stator core 100 is the same, where b is a positive integer and b Satisfaction: b≥1, making the shape of the stator core 100 relatively regular, which facilitates the processing of the stator core 100. For example, the iron core 1 of the entire stator core 100 is z (z is a positive integer, and z ≥ 2) layers, and b may be less than or equal to z; where b = z, the structure of the stator core 100 is further simplified. , Which facilitates the processing of the stator core 100.

Further, along the axial direction of the stator core 100, the shapes of the punched segments 11 from the nth layer to the punched segments 11 of the n + b layer are the same, that is, the shapes of the punched segments 11 of the b + 1 layer are uniform. It is the same, thereby facilitating the processing of the punching segments 11, facilitating the batch processing of the punching segments 11, and improving the processing efficiency of the punching segments 11. For example, in the examples of FIGS. 1 to 3, b = 1, and at this time, n may be an odd number, which ensures the reliability of the fit of the circumferential ends of the punching segment 11.

It can be understood that, along the axial direction of the stator core 100, the shapes of the punched segments 11 from the nth layer to the punched segments 11 of the n + b layer may not be exactly the same; for example, the punched segments 11 to the nth layer The shapes of the punching segments 11 of the n + b layer may be completely different. At this time, the joints 10 of the two adjacent layers from the nth layer to the n + b layer are staggered, but not limited thereto.

Optionally, as shown in FIGS. 1-4, multiple iron chips 1 are connected by multiple rivets 100a, that is, in the axial direction of the stator iron core 100, between two adjacent iron chips 1 At least one rivet 100a is connected, thereby achieving fast connection between two adjacent iron chips 1 and ensuring reliable connection between two adjacent iron chips 1 at the same time.

Specifically, as shown in FIG. 1 to FIG. 4, a plurality of rivets 100 a are provided on the plurality of punching sections 11 one-to-one, that is, one rivet 100 a may be provided on each punching section 11 to simplify In the structure of the punching section 11, the rivet 100a can be formed simultaneously with the punching section 11, for example, the rivet 100a can be stamped and formed with the punching section 11 to improve the processing efficiency of the stator core 100.

It can be understood that the specific position of the rivet 100a on the corresponding punching section 11 can be set according to the actual application. For example, the rivet 100a can be set at the center of the corresponding punching section 11 to ensure the overall rigidity of the stator core 100.

In some specific embodiments of the present application, the minimum gap of the seam 10 is x, and x satisfies: x ≤ 0.02 mm, so that the seam 10 has a suitable minimum gap, which avoids that the gap of the seam 10 is too large and leads to adjacent The connection between the two punching segments 11 is difficult, thereby facilitating the assembly of the punching segments 11.

Optionally, the thickness of each punched segment 11 is t, and t satisfies: t≤0.5mm, so that the punched segment 11 has an appropriate thickness, which avoids the difficulty of processing the punched segment 11 due to the excessive thickness of the punched segment 11 and thus On the premise of ensuring the reliability of the punching section 11, the processing of the punching section 11 is facilitated. Among them, the punching section 11 can be stamped and formed.

The stator 200 according to the embodiment of the second aspect of the present application includes the stator core 100 according to the embodiment of the first aspect of the present application. For example, as shown in FIG. 14, the stator 200 may include a plurality of segmented stators arranged in order along the circumferential direction of the stator 200. Each segmented stator includes a segmented iron core 2, a stator winding, and an insulation assembly 101. The stator windings are wound. On the stator teeth formed by the tooth portions 112 of the plurality of punching sections 11 and between two stator teeth adjacent to each other in the stator winding, an insulation component 101 is arranged on the outside of the stator winding to play an insulating role.

According to the stator 200 in the embodiment of the present application, by using the stator core 100 described above, the eddy current loss of the stator 200 is reduced, and the overall rigidity of the stator 200 is improved.

A motor according to an embodiment of the third aspect of the present application includes the stator 200 according to the embodiment of the second aspect of the present application. The motor may be a rotary motor, but is not limited thereto.

According to the motor of the embodiment of the present application, by using the stator 200 described above, the efficiency of the motor can be effectively improved, vibration and noise of the motor can be reduced, and the user's experience effect can be improved.

Other structures and operations of the motor according to the embodiments of the present application are known to those skilled in the art, and will not be described in detail here.

The stator core 100 according to an embodiment of the present application will be described in detail below with reference to FIGS. 1 to 13 in two specific embodiments. It is to be understood that the following description is only an exemplary description, and not a specific limitation to the present application.

Example one

In this embodiment, as shown in FIGS. 1 to 7, 9, and 11 to 13, the stator core 100 includes 24 iron chips 1 and 24 iron chips that are stacked in the axial direction of the stator core 100. The shape of 1 is the same, each iron chip 1 is formed into a closed ring-like structure, and each iron chip 1 includes 12 punched sections 11 arranged end to end along the circumferential direction, and the thickness of each punched section 11 is t≤ 0.5mm, a seam 10 is formed between two adjacent punching sections 11, each seam 10 is formed as a straight line segment, the minimum gap of the seam 10 x ≤ 0.02mm, along the axial direction of the stator core 100, the nth The seam 10 of the layer and the seam 10 of the n + m layer are staggered. The shape from the punched segment 11 of the nth layer to the punched segment 11 of the n + b layer is the same, where n and m are positive integers, And n is an odd number, m = 2, and b = 1, the manufacturing efficiency of the stator core 100 can be further improved, and the rigidity of the punched section 11 near the joint 10 can be ensured.

Specifically, in a cross section of the stator core 100, an included angle α ≠ 0 ° between a projection of the seam 10 of the nth layer and a projection of the seam 10 of the n + m layer, and the connection of the nth layer The intersection point 10a of the line where the projection of the slit 10 and the line where the projection of the seam 10 of the n + mth layer is located is located on the projection of the yoke 111, and the projection of the intersection 10a is located at the inner end edge of the yoke 111.

As shown in FIG. 1 to FIG. 7, the stator core 100 includes 12 divided cores 2 arranged in sequence along the circumferential direction of the stator core 100, and each of the divided cores 2 includes an axial direction of the stator core 100. The 24 punch segments 11 arranged in a stack are staggered along the axial direction of the stator core 100, the joint 10 of the nth layer and the joint 10 of the n + mth layer, so that two adjacent cores 2 One of the two opposite ends is formed with a protrusion at one end and a groove at the other end, so as to avoid the displacement of two adjacent divided cores 2 in the axial direction of the stator core 100, and The overall rigidity also avoids the occurrence of axial splicing errors between two adjacent divided cores 2 and effectively reduces the eddy current loss of the stator core 100. Referring to FIGS. 11 to 13, FIG. 12 shows the measured eddy current loss of the conventional stator core and the stator core 100 in the present application. It can be clearly seen from FIG. 11 that the eddy current loss of the stator core 100 of the present application Only on the punched segments 11 in the same layer, and the eddy current loss of the conventional stator core is not only on the punched segments 11 in the same layer, but also between the eddy current losses, so that the eddy current loss of the stator core 100 of the present application 27W is far lower than the eddy current loss of the conventional stator core of 36W. The eddy current loss of the conventional stator core is increased by more than 30%. The eddy current loss of the stator core 100 of the present application is the same as that of the stator core in the prior art. The eddy current loss is basically the same. The stator core 100 of the present application is more convenient to process and transport than the stator core of the overall structure. When the stator core 100 of the present application is applied to a motor, the efficiency of the motor can be effectively improved; FIG. 13 It shows the radial vibration of a conventional stator core when it is applied to a motor and the radial vibration of a stator core 100 when it is applied to a motor. It can be clearly seen from the figure that Radial vibration of the motor stator core 100 of the present application is 0.43m / s ² with respect to the radial vibration motor using the conventional stator core 1.03m / s ² decreased by more than 50%, while use of prior art The radial vibration of a motor with an integrated structure stator core is 0.35 m / s ^2. The radial vibration of a motor using the stator core 100 of the present application is different from the radial vibration of a motor with an integrated structure stator core in the prior art. It is not large, so it can be seen that the stator core 100 of the present application has good rigidity and can effectively reduce the vibration and noise of the motor.

Along the axial direction of the stator core 100, two adjacent punching sections 11 are connected by a rivet 100a, and the rivets 100a and the corresponding punching sections 11 are simultaneously stamped and formed, and each punching section 11 includes along the stator core 100 The radially connected yoke portion 111 and the tooth portion 112 are located outside the tooth portion 112, and a stator slot 110 is defined between two adjacent tooth portions 112. When the stator core 100 is applied to the stator 200, the stator The winding of 100 is wound on the teeth 112 and the winding is located in the stator slot 110.

Further, as shown in FIGS. 5 and 6, in the first direction, the width of the outer end of the yoke portion 111 is d2, the width of the inner end of the yoke portion 111 is d1, and d2> d1, where the first direction is the stator core. In the circumferential direction of 100, the first direction is perpendicular to the direction of the center line of the corresponding tooth portion 112.

When a plurality of iron cores 1 are assembled into the stator iron core 100, 12 divided cores 2 can be moved outward in the radial direction of the stator iron core 100 (for example, as shown in FIG. 9), so as to assemble the stator iron core 100. Fast split; when each of the divided cores 2 is wound, 12 divided cores 2 can be moved inward along the radial direction of the stator core 100 (for example, as shown in FIG. 9) to complete the stator quickly The re-assembly of the iron core 100 makes the stator iron core 200 formed as a solid whole.

The stator core 100 according to the embodiment of the present application has a simple and stable structure, which is convenient for transportation and circulation, and is convenient for disassembly. At the same time, the divided core 2 after disassembly has a high degree of freedom, is convenient to manufacture, and is compatible with flat electromagnetic wires. Winding; reduces the eddy current loss of the stator core 100 in order to improve the efficiency of the motor; avoids the detachment of the punched sections 11 in different layers, which improves the overall rigidity of the stator core 100 and facilitates the transportation of the stator core 100 And flow, effectively reduce the vibration and noise of the motor, and improve the applicability of the motor.

Example two

As shown in FIG. 9 and FIG. 10, the structure of this embodiment is substantially the same as that of the first embodiment, in which the same components are denoted by the same reference numerals, except that in the cross section of the stator core 100, the nth layer The intersection point 10a of the straight line where the projection of the joint 10 and the straight line where the joint 10 of the n + mth layer is located is located inside the yoke 111. At this time, the intersection point 10a may be located in the corresponding stator slot 110.

When multiple iron chips 1 are assembled into the stator core 100, the 12 divided cores 2 can be unfolded along the circumferential direction of the stator core 100 (for example, as shown in FIG. 10), so that the 12 divided cores 2 The plurality of divided cores 2 are arranged in a straight line. At this time, the divided cores 2 can be wound by at least one winding device; when each of the divided cores 2 has been wound, 12 divisions are completed. The iron core 2 can be assembled along the original path (for example, as shown in FIG. 10) to quickly complete the reassembly of the stator iron core 100, so that the stator iron core 200 is formed as a solid whole.

In the above-mentioned process of expanding the stator core 100, the overlapping area between two adjacent divided cores 2 is greater than 0, that is, the adjacent two divided cores 2 are not completely independent and Completely separated, but the axial positioning between the adjacent two divided cores 2 is achieved through the overlap between the adjacent two divided cores 2 to complete the winding of the divided cores 2 Later, it is beneficial to achieve accurate splicing of the divided cores 2, so that the divided cores 2 can be assembled along the original path better, and the consistency of the stator core 100 after assembly is ensured.

In the description of this specification, the description with reference to the terms “one embodiment”, “some embodiments”, “exemplary embodiments”, “examples”, “specific examples”, or “some examples”, etc., means that the implementation is combined The specific features, structures, materials, or characteristics described in the examples or examples are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements, and variations can be made to these embodiments without departing from the principles and spirit of the present application, The scope of the application is defined by the claims and their equivalents.

Claims (11)

1. A stator core includes:

   A plurality of iron chips, and the plurality of iron chips are stacked in an axial direction of the stator iron core, and each of the iron chips is formed into a ring structure and includes a plurality of punching sections arranged in sequence along the circumferential direction, adjacent to each other A seam is formed between the two punched segments, and the seam of the nth layer and the seam of the n + m layer are staggered along the axial direction of the stator core, wherein the n, m is a positive integer, and each of n and m satisfies n≥1 and m≥1, and the seam is formed as a straight line segment.
2. The stator core according to claim 1, wherein the stator core includes a plurality of divided cores arranged in order along the circumferential direction, and each of the divided cores includes along the stator core. A plurality of said punching segments are arranged in an axially stacked manner, and each of said punching segments includes a yoke portion and a tooth portion connected in a radial direction of said stator core, and said yoke portion of each of said punching segments is located at Corresponding to the outside of the tooth portion, a circumferential width of an outer end of the yoke portion is larger than a circumferential width of an inner end of the yoke portion.
3. The stator core according to claim 2, characterized in that, in a cross section of the stator core, a projection of the seam of the n-th layer and the joint of the n + m-th layer are projected. The angle between the projections of the seams is α, the α satisfies: α ≠ 0 °, and the straight line where the projection of the seam of the nth layer is located with the seam of the n + mth layer The intersection of the straight line where the projection of is located is inside the yoke.
4. The stator core according to any one of claims 1 to 3, characterized in that all locations from the iron chip of the n-th layer to the n + b layer are along the axial direction of the stator core. The iron chips have the same shape, wherein b is a positive integer, and b satisfies: b ≧ 1.
5. The stator core according to claim 4, wherein along the axial direction of the stator core, from the punched segment of the nth layer to the punched segment of the n + bth layer, The shape is the same.
6. The stator core according to any one of claims 1 to 5, wherein a plurality of the iron chips are connected by a plurality of rivets.
7. The stator core according to claim 6, characterized in that a plurality of the rivets are provided on the plurality of punching sections one-to-one correspondingly.
8. The stator core according to any one of claims 1 to 7, wherein a minimum gap of the joint is x, and the x satisfies: x≤0.02mm.
9. The stator core according to any one of claims 1 to 8, wherein a thickness of each of the punched segments is t, and the t satisfies: t≤0.5 mm.
10. A stator, comprising a stator core according to any one of claims 1-9.
11. A motor, comprising a stator according to claim 10.

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