WO2015196432A1

WO2015196432A1 - Motor stator and motor provided with same

Info

Publication number: WO2015196432A1
Application number: PCT/CN2014/080882
Authority: WO
Inventors: 王飞; 朱嘉东; 朱婷婷; 陈金涛
Original assignee: 广东威灵电机制造有限公司; 美的威灵电机技术（上海）有限公司
Priority date: 2014-06-26
Filing date: 2014-06-26
Publication date: 2015-12-30

Abstract

A motor stator and a motor provided with the same. The motor stator (100) comprises a stator core (1) and multiple bosses (2). The stator core (1) is annular and comprises multiple stator teeth (11) distributed along a circumferential direction. A stator slot (12) used for winding a winding is defined between neighboring stator teeth (11). A radial first end of each stator tooth (11) is provided with a tooth boot (111) and a second end of each stator tooth (11) is provided with a yoke (112). The multiple bosses (2) are separately disposed on an end surface of at least one axial end of the multiple stator teeth (11). Each boss comprises a dedendum (22) and an addendum (23) connected to the dedendum (22). The position of the addendum (23) is corresponding to the tooth boot (111) of the corresponding stator tooth (11).

Description

Motor stator and motor with same

Technical field

The present invention relates to the field of motor manufacturing, and more particularly to a motor stator and a motor therewith. Background technique

In the manufacturing process of the permanent magnet conventional permanent magnet motor, in order to improve the performance of the motor, as shown in FIG. 8, the axial height of the permanent magnet 6' is longer than the stator core 1' to achieve the purpose of collecting magnetism. However, since the permanent magnet 6' is magnetized to the stator core 1' via the air gap of the large reluctance, this method is not satisfactory. Therefore, for a motor with a large axial length of the stator, the above structure causes a low magnetic density of the stator core, thereby reducing material utilization. Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present invention is to provide a motor stator which has a better magnetizing effect and does not reduce the utilization of the stator core material.

Another object of the invention is to propose a motor having the stator of the motor.

A motor stator according to an embodiment of the first aspect of the present invention, comprising: a stator core, the stator core is formed in an annular shape and includes a plurality of stator teeth distributed in a circumferential direction, and the adjacent stator teeth are defined between a stator slot for winding a winding, the stator tooth has a toothed shoe at a first end in a radial direction and a yoke at a second end; a plurality of bosses, the plurality of bosses respectively disposed on the plurality of stator teeth On at least one end face of the axial direction, the boss includes a root and a crown coupled to the root, the crown position corresponding to the tooth shoe position setting of the corresponding stator tooth.

According to the motor stator of the embodiment of the present invention, by adding a boss at the tooth shoes of the stator teeth, the permanent magnets on the rotor can be magnetized to the stator through the small magnetoresistive bosses, thereby enhancing the magnetizing effect. In addition, compared with the conventional stator, the axial length of the stator core is increased without increasing the winding length, thus reducing the weight of the stator core, reducing the winding length and weight, thereby reducing manufacturing. Cost

In some embodiments, the number of the stator teeth and the bosses are equal, and the bosses are located on the same side end face of the stator core.

In some embodiments, the number of the stator teeth is n, and the number of the bosses is 2n, wherein the bosses are provided on both axial end faces of each of the stator teeth.

In some embodiments, each of the bosses is integrally formed in a plurality of silicon steel sheets along the axial direction.

In some embodiments, the crown of each of the bosses has the same shape as the corresponding toothed shoe in the axial direction. In some embodiments, the stator teeth and the boss are connected by a rivet. Thus, the stator of the motor according to the embodiment of the present invention is easily manufactured by riveting the stator teeth and the bosses 2.

In some embodiments, the stator teeth and the boss are integrally stamped in one direction.

In some embodiments, the stator teeth and the boss are bonded.

In some embodiments, the outer ends of the yoke portions of the plurality of stator teeth are integrally formed.

In some embodiments, the yoke portions of the plurality of stator teeth are integrally formed to form an annular stator core.

Optionally, the stator core includes a plurality of punching sheets that are integrally laminated in the axial direction.

In some embodiments, each of the circumferential sides of each of the stator teeth has a first fastening portion and a second fastening portion, and a first fastening portion of each of the stator teeth and a stator tooth adjacent thereto The two fastening portions are engaged to form an annular stator core.

Optionally, each of the stator teeth includes a plurality of tooth blanks that are integrally laminated in an axial direction.

In some embodiments, a first first groove extending along the axial direction is formed on a radially first end surface of the boss, and the stator tooth has a second communication with the first through groove. Through the slot. Thus, by providing the first through groove and the second through groove communicating therewith, after the stator winding is wound into the stator slot, the stator core and the stator winding can be injection molded. At this time, the first through slot and the second through slot The through groove allows the injection molding material to flow therein, thereby enhancing the joint strength between the boss and the stator teeth after the injection molding material solidifies, thereby preventing the boss from moving.

The motor stator according to the embodiment of the present invention has a better magnetizing effect, and reduces the weight of the stator core and the length of the stator winding, and reduces the length of the end portion of the motor when used in the motor, thereby reducing the cost. Further, the motor stator according to an embodiment of the present invention can be used in an air conditioner motor, a washing machine motor, an air freshener motor, or the like.

An electric machine according to an embodiment of the second aspect of the present invention includes a motor stator according to an embodiment of the first aspect of the present invention.

The additional aspects and advantages of the invention will be set forth in part in the description which follows. DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a schematic view showing the assembly of stator teeth and bosses of a stator of a motor according to an embodiment of the present invention; FIG. 2 is a schematic view showing the assembly of stator teeth and bosses of a stator of a motor according to another embodiment of the present invention; A schematic view of an electric machine stator inventing an embodiment;

Figure 3b is a front elevational view of the stator of the motor shown in Figure 3a; 4a is a schematic view of a stator of a motor according to another embodiment of the present invention;

Figure 4b is a front elevational view of the stator of the motor shown in Figure 4a;

Figure 5a is a schematic illustration of a stator of a motor in accordance with still another embodiment of the present invention;

Figure 5b is a front elevational view of the stator of the motor shown in Figure 5a;

Figure 6a is a schematic view of a stator of a motor according to still another embodiment of the present invention;

Figure 6b is a front elevational view of the stator of the motor shown in Figure 6a;

7 is a schematic view showing the assembly of stator teeth and bosses of a stator of a motor according to still another embodiment of the present invention; and FIG. 8 is a partial perspective view of a stator and a rotor in a conventional motor. Reference mark:

Motor stator 100;

Stator core 1; stator teeth 11; tooth punching plate 110; toothed shoe 111; yoke 112;

The stator slot 12; the first fastening portion 13; the second fastening portion 14;

Boss 2; through groove 21; root 22; crown 23; rivet point 3; V-shaped gap 4;

In the traditional motor: stator core 1'; winding 5'; permanent magnet 6'; rotor 7'

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative only, and are not to be construed as limiting.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "left", "right", "inside", "outside", "axial", "circumferential" The orientation or positional relationship of the indications is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description of the invention and the simplified description, rather than indicating or implying that the device or component referred to has a specific orientation, Azimuth construction and operation are therefore not to be construed as limiting the invention. Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include one or more of the features, either explicitly or implicitly. In the description of the present invention, "multiple" means two or more unless otherwise stated.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" should be understood broadly, and may be either fixed or detachable, unless explicitly stated or defined otherwise. Connected, or connected in one piece; can be mechanical or electrical; can be connected directly or through The medium is indirectly connected and can be internal to the two components. The specific meanings of the above terms in the present invention can be understood in the specific circumstances by those skilled in the art.

A motor stator according to an embodiment of the first aspect of the present invention will now be described with reference to Figs. 1 - 5b.

A motor stator 100 according to an embodiment of the present invention includes: a stator core 1 and a plurality of bosses 2, the stator core 1 being formed in an annular shape and including a plurality of stator teeth 1 1 distributed in the circumferential direction Between the stator teeth 11 is defined a stator slot 12 for winding a winding, the stator tooth 11 having a toothed shoe 11 1 at a first end in the radial direction and a yoke 112 at a second end.

The motor stator according to an embodiment of the present invention can be used in an inner rotor motor or in an outer rotor motor. In the case of the outer rotor motor, in the example shown in Figs. 6a - 7, the rotor is located outside the stator 100, in which case the first end of the stator teeth in the radial direction is the outer end and the second end is the inner end. In the description of the present invention, it is exemplified for use in an inner rotor motor, that is, a rotor (not shown) is located inside the stator, and at this time, the first end of the stator teeth in the radial direction is the inner end, and the second The end is an outer end, as shown in Figs. 1-7, wherein the inner end of the stator tooth 11 refers to one end adjacent to the center of the stator core 1, and the outer end refers to one end away from the center of the stator core 1.

The plurality of bosses 2 are respectively disposed on at least one end surface of the plurality of stator teeth 11 in the axial direction, and the boss 2 includes a root 22 and a crown 23 connected to the root 22, and the position of the crown 23 corresponds to the corresponding The position of the toothed shoes 111 of the stator teeth 11 is set, and the roots 22 correspond to the radially intermediate portions of the stator teeth 11. In an alternative example, in the axial direction, the crown of each boss 2 has the same shape as its corresponding toothed shoe 11 1 . In a further alternative example, the root 2 of each boss 2 has the same width as its corresponding stator tooth 11 .

According to the motor stator of the embodiment of the present invention, by adding the boss 2 at the toothed shoe 111 of the stator tooth 11, the permanent magnet on the rotor (not shown) can be magnetized to the stator through the small magnetoresistive boss. Enhanced the magnetic focusing effect. In addition, compared with the conventional stator, the axial length of the stator core is increased without increasing the winding length, thus reducing the weight of the stator core, reducing the winding length and weight, thereby reducing manufacturing. Cost

According to an embodiment of the present invention, the number of the stator teeth 11 and the bosses 2 is equal, and the bosses 2 are located on the same side end faces of the stator cores 1. For example, in the example shown in Fig. 2, the boss 2 is provided only on the end face of one side of the stator teeth 11.

According to another embodiment of the present invention, the number of the stator teeth 11 is n, and the number of the bosses 2 is 2n, that is, the number of the bosses 2 is twice the number of the stator teeth, so that in each stator The two axial end faces of the teeth 11 each have a boss 2 as shown in FIG.

As shown in FIGS. 1 and 2, each of the bosses 2 is integrally formed by a plurality of silicon steel sheets in the axial direction. As a result, the cost is lower. Further, the stator teeth 11 and the bosses 2 are connected by a rivet method. Referring to FIGS. 1 and 2, rivet points 3 are provided on both the boss 2 and the stator teeth 11. Thereby, the stator of the motor according to the embodiment of the present invention is easily manufactured by riveting the stator teeth 11 and the bosses 2. Of course, the invention is not limited thereto, and in other embodiments, the stator teeth 11 The bosses 2 may be punched together in the axial direction or may be joined by bonding or the like.

In some embodiments, as shown in FIGS. 3a and 3b, each circumferential side of each stator tooth 11 has a first fastening portion 13 and a second fastening portion 14, respectively, and a first fastening of each stator tooth 11 The portion 13 is engaged with the second engaging portion 14 of the stator teeth 11 adjacent thereto to form an annular stator core 1. Optionally, each stator tooth 11 includes a plurality of tooth blanks 110 that are integrally laminated in an axial direction.

In other embodiments, the outer ends of the yoke portions 12 of the plurality of stator teeth 11 are integrally formed. As shown in FIGS. 4a and 4b, the stator core 1 is first formed into an integral strip shape during molding, wherein the phases are formed. A V-shaped gap 4 having an opening toward the inner end is provided between the yoke portions 12 of the adjacent two stator teeth 11, and the adjacent two yoke portions 112 are connected outside the V-shaped gap 4, whereby when the stator core 1 is bent The V-shaped gap 4 is squeezed away to bend the stator core 1 into a closed loop shape. Of course, the invention is not limited thereto, and in still other alternative embodiments, as shown in Figs. 5a, 5b, the yoke portions 112 of the plurality of stator teeth 11 are integrally formed to form an annular stator core 1. In the above embodiment, optionally, the stator core 1 includes a plurality of punching sheets which are integrally laminated in the axial direction.

As shown in FIG. 1 to FIG. 5b, the inner end surface of the boss 2 is formed with a first through groove 21 extending in the axial direction, and the stator tooth 11 has a second communicating with the first through groove 21 Through slot 113. Thus, by providing the first through groove 21 and the second through groove 113 communicating therewith, after the stator winding (not shown) is wound into the stator slot 12, the stator core and the stator winding can be injection molded. The first through groove 21 and the second through groove 113 allow the injection molding material to flow therein, thereby enhancing the joint strength between the boss 2 and the stator teeth 11 after the injection molding material solidifies, thereby preventing the boss from moving.

Motor stators of various embodiments of the present invention are described below with reference to Figures 3-7.

Embodiment 1,

As shown in FIGS. 3a and 3b, the stator core 1 includes a plurality of stator teeth 1 1 that are engaged with each other, and each of the circumferential sides of each of the stator teeth 11 has a first engaging portion 13 and a second engaging portion 14 respectively. The first engaging portion 13 of each of the stator teeth 11 and the second engaging portion 14 of the stator teeth 11 adjacent thereto are engaged to form an annular stator core 1.

Here, as shown in Fig. 3a, the number of the bosses 2 is twice the number of the stator teeth, so that the bosses 2 are provided on both axial end faces of each of the stator teeth 11. Of course, in an example not shown, the number of the stator teeth 11 and the bosses 2 may be equal, and the bosses 2 are located on the same side end faces of the stator core 1.

A first through groove 21 extending in the axial direction is formed on an end surface of the inner end of the boss 2, and the stator tooth 11 has a second through groove 113 communicating with the first through groove 21. After the stator windings (not shown) are wound into the stator slots 12, the stator core and the stator windings may be injection molded. At this time, the first through slots 21 and the second through slots 113 allow the injection molding material to flow into it. Thus, the strength of the connection between the boss 2 and the stator teeth 11 is enhanced after the injection molding material solidifies, thereby preventing the boss from moving. Embodiment 2,

As shown in Figs. 4a and 4b, the outer ends of the yoke portions 112 of the plurality of stator teeth 11 are integrally formed. The stator core 1 is first formed into an integral strip shape during molding, wherein the yoke portions 112 of the adjacent two stator teeth 11 have a V-shaped gap 4 opening toward the inner end, and the adjacent two yoke portions 112 are The outside of the V-shaped gap 4 is connected, whereby, when the stator core 1 is bent, the V-shaped gap 4 is squeezed away to bend the stator core 1 into a closed ring shape.

Here, as shown in Fig. 4a, the number of the bosses 2 is twice the number of the stator teeth, so that the bosses 2 are provided on both axial end faces of each of the stator teeth 11. Of course, in an example not shown, the number of the stator teeth 11 and the bosses 2 may be equal, and the bosses 2 are located on the same side end faces of the stator core 1.

A first through groove 21 extending in the axial direction is formed on the inner end surface of the boss 2, and the stator tooth 11 has a second through groove 113 communicating with the first through groove 21. After the stator windings (not shown) are wound into the stator slots 12, the stator core and the stator windings may be injection molded. At this time, the first through slots 21 and the second through slots 113 allow the injection molding material to flow into it. Thus, the strength of the connection between the boss 2 and the stator teeth 11 is enhanced after the injection molding material solidifies, thereby preventing the boss from moving. Embodiment 3,

As shown in Figs. 5a and 5b, the yoke portions 112 of the plurality of stator teeth 11 are integrally formed to form an annular stator core 1. The stator core 1 includes a plurality of punching sheets which are integrally laminated in the axial direction, and each of the bosses 2 is integrally formed by a plurality of silicon steel sheets in the axial direction.

A first through groove 21 extending in the axial direction is formed on the inner end surface of the boss 2, and the stator tooth 11 has a second through groove 113 communicating with the first through groove 21. After the stator windings (not shown) are wound into the stator slots 12, the stator core and the stator windings may be injection molded. At this time, the first through slots 21 and the second through slots 113 allow the injection molding material to flow into it. Thus, the strength of the connection between the boss 2 and the stator teeth 11 is enhanced after the injection molding material solidifies, thereby preventing the boss from moving. Embodiment 4,

As shown in Figs. 6a-6b, the motor stator according to the present embodiment is used in an outer rotor motor. At this time, the first end of the stator tooth in the radial direction is the outer end, and the second end is the inner end. That is, the outer end of the stator tooth 11 has a toothed shoe 111, and the inner end has a yoke portion 112. A plurality of bosses 2 are respectively provided on the at least one end faces of the plurality of stator teeth 11 in the axial direction and are provided corresponding to the toothed shoes 111 of the respective stator teeth 11. Preferably, in the axial direction, each boss 2 has the same shape as its corresponding toothed shoe 111. In the present embodiment, as shown in Figs. 6a and 6b, the number of the bosses 2 is twice the number of the stator teeth, so that the boss 2 is provided on both axial end faces of each of the stator teeth 11. Of course, in an example not shown, the number of the stator teeth 11 and the bosses 2 may be equal, and the bosses 2 are located on the same side end face of the stator core 1.

In the present embodiment, the yoke portions 112 of the plurality of stator teeth 11 are integrally formed to form an annular stator core 1. The stator core 1 includes a plurality of punching sheets which are integrally laminated in the axial direction, and each of the bosses 2 is integrally formed by a plurality of silicon steel sheets in the axial direction. Embodiment 5,

The embodiment is similar to the fourth embodiment except that the stator core 1 of the motor stator of the embodiment includes a plurality of stator teeth 11 that are engaged with each other, and each of the stator teeth 11 has a circumferential side of each of the stator teeth 11 respectively. The first fastening portion 13 and the second fastening portion 14 , the first fastening portion 13 of each of the stator teeth 11 and the second fastening portion 14 of the stator teeth 11 adjacent thereto are engaged to form an annular stator iron Core 1. The motor stator according to the embodiment of the present invention has a better magnetizing effect, and reduces the weight of the stator core and the length of the stator winding, and reduces the length of the end portion of the motor when used in the motor, thereby reducing the cost. Further, the motor stator according to an embodiment of the present invention can be used in an air conditioner motor, a washing machine motor, an air freshener motor, or the like.

An electric machine according to an embodiment of the second aspect of the present invention includes a motor stator 100 according to an embodiment of the first aspect of the present invention. Other configurations of the motor, such as a rotor, etc., and operations in accordance with embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples", etc. Particular features, structures, materials or features described in the examples or examples are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

While the embodiments of the present invention have been shown and described, the embodiments of the invention may The scope of the invention is defined by the claims and their equivalents.

Claims

Claim

I. A motor stator, comprising:

a stator core, the stator core is formed in an annular shape and includes a plurality of stator teeth distributed in a circumferential direction, and adjacent stator teeth define a stator slot for winding the winding, the stator teeth a first end in the radial direction has a toothed shoe and a second end has a yoke;

a plurality of bosses respectively disposed on at least one end face of the plurality of stator teeth in the axial direction, the boss comprising a root and a crown connected to the root, the crown The position corresponds to the position of the toothed shoe of the respective stator tooth.

2. The motor stator according to claim 1, wherein the number of the stator teeth and the bosses are equal, and the bosses are located on the same side end surface of the stator core.

The motor stator according to claim 1, wherein the number of the stator teeth is n, and the number of the bosses is 2n, wherein each of the stator teeth has two axial end faces The boss.

The motor stator according to claim 1, wherein each of said bosses is integrally formed by a plurality of silicon steel sheets in said axial direction.

The motor stator according to claim 1, wherein in the axial direction, a shape of a crown of each of the bosses coincides with a shape of the corresponding toothed shoe.

6. The motor stator according to claim 1, wherein the stator teeth and the boss are connected by a rivet.

7. The motor stator according to claim 1, wherein the stator teeth and the boss are integrally punched in the axial direction.

8. The motor stator according to claim 1, wherein the stator teeth and the boss are bonded.

The motor stator according to claim 1, wherein an outer end of the yoke portion of the plurality of stator teeth is integrally formed.

The motor stator according to claim 1, wherein the yoke portions of the plurality of stator teeth are integrally formed to form an annular stator core.

I. The stator of an electric machine according to claim 9 or 10, wherein said stator core comprises a plurality of punching sheets integrally laminated in the axial direction.

12 . The motor stator according to claim 1 , wherein each of the circumferential sides of each of the stator teeth has a first fastening portion and a second fastening portion, and the first fastening of each stator tooth The portion is engaged with the second engaging portion of the stator teeth adjacent thereto to form an annular stator core.

13. The motor stator according to claim 12, wherein each of said stator teeth comprises a plurality of tooth punches integrally laminated in the axial direction.

The motor stator according to any one of claims 1 to 13, wherein a first end surface of the boss is formed with a first through groove extending along the axial direction, and the stator is The tooth has a second through groove communicating with the first through groove.

15. An electric machine, comprising the stator of the electric machine according to any one of claims 1-14.