WO2015196432A1 - 电机定子和具有其的电机 - Google Patents

电机定子和具有其的电机 Download PDF

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Publication number
WO2015196432A1
WO2015196432A1 PCT/CN2014/080882 CN2014080882W WO2015196432A1 WO 2015196432 A1 WO2015196432 A1 WO 2015196432A1 CN 2014080882 W CN2014080882 W CN 2014080882W WO 2015196432 A1 WO2015196432 A1 WO 2015196432A1
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WO
WIPO (PCT)
Prior art keywords
stator
motor
teeth
stator teeth
bosses
Prior art date
Application number
PCT/CN2014/080882
Other languages
English (en)
French (fr)
Inventor
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 (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 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 filed Critical 广东威灵电机制造有限公司
Priority to PCT/CN2014/080882 priority Critical patent/WO2015196432A1/zh
Publication of WO2015196432A1 publication Critical patent/WO2015196432A1/zh

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/14Stator cores with salient poles

Definitions

  • the present invention relates to the field of motor manufacturing, and more particularly to a motor stator and a motor therewith. Background technique
  • the axial height of the permanent magnet 6' is longer than the stator core 1' to achieve the purpose of collecting magnetism.
  • 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.
  • 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 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.
  • the permanent magnets on the rotor can be magnetized to the stator through the small magnetoresistive bosses, thereby enhancing the magnetizing effect.
  • 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.
  • 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.
  • 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.
  • each of the bosses is integrally formed in a plurality of silicon steel sheets along the axial direction.
  • the crown of each of the bosses has the same shape as the corresponding toothed shoe in the axial direction.
  • the stator teeth and the boss are connected by a rivet.
  • 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.
  • stator teeth and the boss are integrally stamped in one direction.
  • stator teeth and the boss are bonded.
  • the outer ends of the yoke portions of the plurality of stator teeth are integrally formed.
  • the yoke portions of the plurality of stator teeth are integrally formed to form an annular stator core.
  • the stator core includes a plurality of punching sheets that are integrally laminated in the axial direction.
  • 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.
  • each of the stator teeth includes a plurality of tooth blanks that are integrally laminated in an axial direction.
  • 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.
  • the stator core and the stator winding can be injection molded.
  • 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 includes a motor stator according to an embodiment of the first aspect of the present invention.
  • FIG. 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
  • 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;
  • FIG. 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.
  • FIG. 8 is a partial perspective view of a stator and a rotor in a conventional motor. Reference mark:
  • Stator core 1 stator teeth 11; tooth punching plate 110; toothed shoe 111; yoke 112;
  • stator slot 12 The stator slot 12; the first fastening portion 13; the second fastening portion 14;
  • stator core 1' In the traditional motor: stator core 1'; winding 5'; permanent magnet 6'; rotor 7'
  • 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 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.
  • the rotor 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.
  • 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.
  • the crown of each boss 2 in the axial direction, has the same shape as its corresponding toothed shoe 11 1 .
  • the root 2 of each boss 2 has the same width as its corresponding 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.
  • 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.
  • 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.
  • the boss 2 is provided only on the end face of one side of the stator teeth 11.
  • the number of the stator teeth 11 is n
  • 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.
  • 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.
  • 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.
  • each stator tooth 11 includes a plurality of tooth blanks 110 that are integrally laminated in an axial direction.
  • the outer ends of the yoke portions 12 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 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.
  • the invention is not limited thereto, and in still other alternative embodiments, as shown in Figs.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the stator windings (not shown) are wound into the stator slots 12, the stator core and the stator windings may be injection molded.
  • the first through slots 21 and the second through slots 113 allow the injection molding material to flow into it.
  • 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.
  • 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.
  • 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.
  • 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.
  • the stator windings (not shown) are wound into the stator slots 12, the stator core and the stator windings may be injection molded.
  • the first through slots 21 and the second through slots 113 allow the injection molding material to flow into it.
  • 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.
  • 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.
  • the stator windings (not shown) are wound into the stator slots 12, the stator core and the stator windings may be injection molded.
  • the first through slots 21 and the second through slots 113 allow the injection molding material to flow into it.
  • 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.
  • the motor stator according to the present embodiment is used in an outer rotor motor.
  • the first end of the stator tooth in the radial direction is the outer end
  • 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.
  • each boss 2 has the same shape as its corresponding toothed shoe 111.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 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.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

一种电机定子和具有其的电机。所述电机定子(100)包括:定子铁芯(1),所述定子铁芯(1)形成为环状且包括沿周向分布的多个定子齿(11),相邻的所述定子齿(11)之间限定出用于绕制绕组的定子槽(12),所述定子齿(11)上沿径向的第一端具有齿靴(111)且第二端具有轭部(112);多个凸台(2),所述多个凸台(2)分别设在多个定子齿(11)的沿轴向的至少一端端面上,所述凸台包括齿根(22)和与所述齿根(22)连接的齿冠(23),所述齿冠(23)的位置对应于相应的所述定子齿(11)的所述齿靴(111)。

Description

电机定子和具有其的电机
技术领域
本发明涉及电机制造领域, 尤其是涉及一种电机定子和具有其的电机。 背景技术
永磁体传统永磁电机的制造工艺中, 为了提高电机的性能,如图 8所示, 使永磁体 6 ' 的轴向高度长于定子铁芯 1 ' , 以实现聚磁目的。 然而, 由于永磁体 6 ' 经由大磁 阻的气隙向定子铁芯 1 ' 聚磁, 此种方法效果并不理想。 因此, 对于定子轴向长度较大 的电机, 采用上述结构会造成定子铁芯磁密较低, 从而降低材料利用率。 发明内容
本发明旨在至少解决现有技术中存在的技术问题之一。为此, 本发明的一个目的在 于提出一种聚磁效果更好且不降低定子铁芯材料利用率的电机定子。
本发明的另一个目的在于提出一种具有所述电机定子的电机。
根据本发明第一方面实施例的电机定子, 包括: 定子铁芯, 所述定子铁芯形成为环 状且包括沿周向分布的多个定子齿, 相邻的所述定子齿之间限定出用于绕制绕组的定 子槽, 所述定子齿沿径向的第一端具有齿靴且第二端具有轭部; 多个凸台, 所述多个 凸台分别设在多个定子齿的沿轴向的至少一端端面上, 所述凸台包括齿根和与所述齿 根连接的齿冠, 所述齿冠位置对应于相应的所述定子齿的所述齿靴位置设置。
根据本发明实施例的电机定子, 通过在定子齿的齿靴处增加凸台, 可以将转子上的 永磁体通过小磁阻的凸台向定子聚磁, 从而增强了聚磁效果。 另外, 与传统定子相比, 既增大了定子铁芯轴向长度, 又不会增加绕组匝长, 这样, 减小了定子铁芯重量, 减 小了绕组匝长和重量, 从而降低了制造成本
在一些实施例中, 所述定子齿和所述凸台的个数相等, 且所述凸台位于所述定子铁 芯的同一侧端面上。
在一些实施例中, 所述定子齿的个数为 n, 所述凸台的个数为 2n, 其中每个定子齿 的两个轴向端面上均具有所述凸台。
在一些实施例中, 每个所述凸台由多个硅钢片沿所述轴向冲制成一体。
在一些实施例中, 在所述轴向上, 每个所述凸台的齿冠的形状与其对应的所述齿靴 的形状相同。 在一些实施例中, 所述定子齿和凸台通过铆扣方式连接。 由此, 通过将定子齿和凸 台 2铆扣连接, 使得根据本发明实施例的电机定子易于制造。
在一些实施例中, 所述定子齿和凸台沿轴向冲制成一体。
在一些实施例中, 所述定子齿和凸台粘接。
在一些实施例中, 所述多个定子齿的轭部的外端一体成型。
在一些实施例中, 所述多个定子齿的轭部一体成型以形成环状的定子铁芯。
可选地, 所述定子铁芯包括沿轴向叠压成一体的多个冲片。
在一些实施例中, 每个所述定子齿的周向两侧分别具有第一扣合部和第二扣合部, 每个定子齿的第一扣合部和与其相邻的定子齿的第二扣合部卡合以形成环状的定子铁 芯。
可选地, 每个所述定子齿包括沿轴向叠压成一体的多个齿冲片。
在一些实施例中, 所述凸台的径向第一端端面上形成有沿所述轴向延伸的第一通 槽, 且所述定子齿上有与所述第一通槽连通的第二通槽。 由此, 通过设置第一通槽和 与其连通的第二通槽, 在定子绕组绕制到定子槽内之后, 可以对定子铁芯和定子绕组 进行注塑, 此时, 第一通槽和第二通槽可以使注塑材料能够流入其内, 这样在注塑材 料凝固后增强凸台和定子齿之间的连接强度, 从而防止凸台移动。
根据本发明实施例的电机定子, 聚磁效果更好, 且减小了定子铁芯的重量和定子绕 组的匝长, 用于电机时可减小电机的端部长度, 从而降低了成本。 此外, 根据本发明 实施例的电机定子可以用于空调电机、 洗衣机电机、 空气清新机电机等中。
根据本发明第二方面实施例的一种电机,包括根据本发明第一方面实施例的电机定 子。
本发明的附加方面和优点将在下面的描述中部分给出,部分将从下面的描述中变得 明显, 或通过本发明的实践了解到。 附图说明
本发明的上述和 /或附加的方面和优点从结合下面附图对实施例的描述中将变得明 显和容易理解, 其中:
图 1是根据本发明一个实施例的电机定子的定子齿和凸台的装配示意图; 图 2是根据本发明另一个实施例的电机定子的定子齿和凸台的装配示意图; 图 3a是根据本发明一个实施例的电机定子的示意图;
图 3b是图 3a中所示的电机定子的主视图; 图 4a是根据本发明另一个实施例的电机定子的示意图;
图 4b是图 4a中所示的电机定子的主视图;
图 5a是根据本发明再一个实施例的电机定子的示意图;
图 5b是图 5a中所示的电机定子的主视图;
图 6a是根据本发明又一个实施例的电机定子的示意图;
图 6b是图 6a中所示的电机定子的主视图;
图 7是根据本发明再一个实施例的电机定子的定子齿和凸台的装配示意图; 图 8是传统的电机中定子与转子的局部配合示意图。 附图标记:
电机定子 100;
定子铁芯 1; 定子齿 11; 齿冲片 110; 齿靴 111; 轭部 112;
定子槽 12; 第一扣合部 13; 第二扣合部 14;
凸台 2; 通槽 21; 齿根 22; 齿冠 23; 铆扣点 3; V形间隙 4;
传统电机中: 定子铁芯 1' ; 绕组 5' ; 永磁体 6' ; 转子 7'
具体实施方式
下面详细描述本发明的实施例, 所述实施例的示例在附图中示出, 其中自始至终相 同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。 下面通过参考 附图描述的实施例是示例性的, 仅用于解释本发明, 而不能理解为对本发明的限制。
在本发明的描述中, 需要理解的是, 术语 "中心"、 "长度"、 "宽度"、 "左"、 "右" 、 "内" 、 "外" 、 "轴向" 、 "周向"等指示的方位或位置关系为基于附图 所示的方位或位置关系, 仅是为了便于描述本发明和简化描述, 而不是指示或暗示所 指的装置或元件必须具有特定的方位、 以特定的方位构造和操作, 因此不能理解为对 本发明的限制。 此外, 术语 "第一" 、 "第二 " 仅用于描述目的, 而不能理解为指示 或暗示相对重要性或者隐含指明所指示的技术特征的数量。 由此, 限定有 "第一" 、 "第二"的特征可以明示或者隐含地包括一个或者更多个该特征。 在本发明的描述中, 除非另有说明, "多个" 的含义是两个或两个以上。
在本发明的描述中, 需要说明的是, 除非另有明确的规定和限定, 术语 "安装" 、 "相连" 、 "连接" 应做广义理解, 例如, 可以是固定连接, 也可以是可拆卸连接, 或一体地连接; 可以是机械连接, 也可以是电连接; 可以是直接相连, 也可以通过中 间媒介间接相连, 可以是两个元件内部的连通。 对于本领域的普通技术人员而言, 可 以具体情况理解上述术语在本发明中的具体含义。
下面参考图 1-图 5b描述根据本发明第一方面实施例的电机定子。
根据本发明实施例的一种电机定子 100, 包括: 定子铁芯 1和多个凸台 2, 定子铁 芯 1形成为环状且包括沿周向分布的多个定子齿 1 1,相邻的定子齿 11之间限定出用于 绕制绕组的定子槽 12,定子齿 11沿径向的第一端具有齿靴 11 1且第二端具有轭部 112。
根据本发明实施例的电机定子可以用于内转子电机中, 也可以用于外转子电机中。 用于外转子电机中时, 在如图 6a-图 7所示的示例中, 转子位于定子 100之外, 此时定 子齿沿径向的第一端为外端、 第二端为内端。 而在本发明的描述中, 均以用于内转子 电机中为例进行说明, 即转子 (图未示出) 位于定子内部, 此时定子齿沿径向的第一 端为内端、 第二端为外端, 如图 1-7所示, 其中定子齿 11的内端指的是邻近定子铁芯 1的中心的一端, 外端指的是远离定子铁芯 1的中心的一端。
多个凸台 2分别设在多个定子齿 11的沿轴向的至少一端端面上, 凸台 2包括齿根 22和与齿根 22连接的齿冠 23, 齿冠 23的位置对应于相应的定子齿 1 1的齿靴 111的 位置设置, 且齿根 22对应于定子齿 11 的径向中间部分对应。 在一个可选的示例中, 在轴向上, 每个凸台 2的齿冠的形状与其对应的齿靴 11 1 的形状相同。 在进一步可选 的示例中, 每个凸台 2的齿根 2的宽度与其对应的定子齿 1 1的宽度相同。
根据本发明实施例的电机定子, 通过在定子齿 11 的齿靴 111处增加凸台 2, 可以 将转子 (图未示出) 上的永磁体通过小磁阻的凸台向定子聚磁, 从而增强了聚磁效果。 另外, 与传统定子相比, 既增大了定子铁芯轴向长度, 又不会增加绕组匝长, 这样, 减小了定子铁芯重量, 减小了绕组匝长和重量, 从而降低了制造成本
根据本发明的一个实施例, 定子齿 1 1和凸台 2的个数相等, 且凸台 2位于定子铁 芯 1的同一侧端面上。 例如在如图 2所示的示例中, 凸台 2仅设在定子齿 1 1的一侧的 端面上。
根据本发明的另一个实施例, 定子齿 11的个数为 n, 凸台 2的个数为 2n, 也就是 说, 凸台 2的数量为定子齿的数量的 2倍, 这样在每个定子齿 11的两个轴向端面上均 具有凸台 2, 如图 1所示。
如图 1和图 2所示,每个凸台 2由多个硅钢片沿轴向冲制成一体。由此,成本较低。 进一步地, 定子齿 11和凸台 2通过铆扣方式连接, 参考图 1和图 2, 在凸台 2和定子 齿 11上均设置铆扣点 3。 由此, 通过将定子齿 11和凸台 2铆扣连接, 使得根据本发明 实施例的电机定子易于制造。 当然, 本发明不限于此, 在另一些实施例中, 定子齿 11 和凸台 2可以沿轴向冲制成一起, 也可以通过粘接等方式进行连接。
在一些实施例中, 如图 3a和 3b所示, 每个定子齿 11的周向两侧分别具有第一扣 合部 13和第二扣合部 14, 每个定子齿 11的第一扣合部 13和与其相邻的定子齿 11的 第二扣合部 14卡合以形成环状的定子铁芯 1。可选地, 每个定子齿 11包括沿轴向叠压 成一体的多个齿冲片 110。
在另一些实施例中, 多个定子齿 11的轭部 1 12的外端一体成型, 如图 4a和图 4b 所示, 定子铁芯 1在成型时, 首先成型为一体长条形, 其中相邻两个定子齿 11的轭部 1 12之间具有开口朝向内端的 V形间隙 4, 且相邻的两个轭部 112在 V形间隙 4外侧相 连, 由此, 在定子铁芯 1弯曲时, V形间隙 4被挤压消除以将定子铁芯 1弯曲成封闭的 环形。 当然本发明并不限于此, 在再一些可选实施例中, 如图 5a、 5b所示, 多个定子 齿 11的轭部 112—体成型以形成环状的定子铁芯 1。 在以上实施例中, 可选地, 定子 铁芯 1包括沿轴向叠压成一体的多个冲片。
如图 1-图 5b所示, 凸台 2的内端端面上形成有沿轴向延伸的第一通槽 21, 且所述 定子齿 11上有与所述第一通槽 21连通的第二通槽 113。 由此, 通过设置第一通槽 21 和与其连通的第二通槽 113, 在定子绕组 (图未示出) 绕制到定子槽 12内之后, 可以 对定子铁芯和定子绕组进行注塑, 此时, 第一通槽 21和第二通槽 113可以使注塑材料 能够流入其内, 这样在注塑材料凝固后增强凸台 2和定子齿 11之间的连接强度, 从而 防止凸台移动。
下面参考图 3-图 7描述本发明多个具体实施例的电机定子。
实施例一,
如图 3a和 3b所示, 定子铁芯 1包括多个彼此卡合的定子齿 1 1, 每个定子齿 1 1的 周向两侧分别具有第一扣合部 13和第二扣合部 14, 每个定子齿 11 的第一扣合部 13 和与其相邻的定子齿 11的第二扣合部 14卡合以形成环状的定子铁芯 1。
其中, 如图 3a所示, 凸台 2的数量为定子齿的数量的 2倍, 这样在每个定子齿 11 的两个轴向端面上均具有凸台 2。 当然, 在一个未示出的示例中, 定子齿 11和凸台 2 的个数也可以相等, 且凸台 2位于定子铁芯 1的同一侧端面上。
凸台 2的内端端面上形成有沿轴向延伸的第一通槽 21, 且所述定子齿 11上有与所 述第一通槽 21连通的第二通槽 113。在定子绕组(图未示出)绕制到定子槽 12内之后, 可以对定子铁芯和定子绕组进行注塑, 此时, 第一通槽 21和第二通槽 113可以使注塑 材料能够流入其内, 这样在注塑材料凝固后增强凸台 2和定子齿 11之间的连接强度, 从而防止凸台移动。 实施例二,
如图 4a和图 4b所示, 多个定子齿 1 1的轭部 112的外端一体成型。 定子铁芯 1在 成型时, 首先成型为一体长条形, 其中相邻两个定子齿 11的轭部 112之间具有开口朝 向内端的 V形间隙 4, 且相邻的两个轭部 112在 V形间隙 4外侧相连, 由此, 在定子铁 芯 1弯曲时, V形间隙 4被挤压消除以将定子铁芯 1弯曲成封闭的环形。
其中, 如图 4a所示, 凸台 2的数量为定子齿的数量的 2倍, 这样在每个定子齿 11 的两个轴向端面上均具有凸台 2。 当然, 在一个未示出的示例中, 定子齿 11和凸台 2 的个数也可以相等, 且凸台 2位于定子铁芯 1的同一侧端面上。
凸台 2的内端端面上形成有沿轴向延伸的第一通槽 21, 且所述定子齿 11上有与所 述第一通槽 21连通的第二通槽 113。在定子绕组(图未示出)绕制到定子槽 12内之后, 可以对定子铁芯和定子绕组进行注塑, 此时, 第一通槽 21和第二通槽 113可以使注塑 材料能够流入其内, 这样在注塑材料凝固后增强凸台 2和定子齿 11之间的连接强度, 从而防止凸台移动。 实施例三,
如图 5a和图 5b所示, 多个定子齿 1 1的轭部 112—体成型以形成环状的定子铁芯 1。 定子铁芯 1包括沿轴向叠压成一体的多个冲片, 且每个凸台 2由多个硅钢片沿轴向 冲制成一体。
凸台 2的内端端面上形成有沿轴向延伸的第一通槽 21, 且所述定子齿 11上有与所 述第一通槽 21连通的第二通槽 113。在定子绕组(图未示出)绕制到定子槽 12内之后, 可以对定子铁芯和定子绕组进行注塑, 此时, 第一通槽 21和第二通槽 113可以使注塑 材料能够流入其内, 这样在注塑材料凝固后增强凸台 2和定子齿 11之间的连接强度, 从而防止凸台移动。 实施例四,
如图 6a_6b所示, 根据本实施例的电机定子用于外转子电机中。 此时, 定子齿沿径 向的第一端为外端、 第二端为内端。 也就是说, 定子齿 11的外端具有齿靴 111, 内端 具有轭部 1 12。 多个凸台 2分别设在多个定子齿 1 1的沿轴向的至少一端端面上且对应 于相应的定子齿 11的齿靴 111设置。 优选地, 在轴向上, 每个凸台 2的形状与其对应 的齿靴 111的形状相同。 在本实施例中, 如图 6a和 6b所示, 凸台 2的数量为定子齿的数量的 2倍, 这样在 每个定子齿 11的两个轴向端面上均具有凸台 2。 当然, 在一个未示出的示例中, 定子 齿 11和凸台 2的个数也可以相等, 且凸台 2位于定子铁芯 1的同一侧端面上。
在本实施例中, 多个定子齿 11 的轭部 112—体成型以形成环状的定子铁芯 1。 定 子铁芯 1包括沿轴向叠压成一体的多个冲片, 且每个凸台 2 由多个硅钢片沿轴向冲制 成一体。 实施例五,
本实施例与上述实施例四类似, 不同之处仅在于, 本实施例的电机定子的定子铁芯 1包括多个彼此卡合的定子齿 11, 每个定子齿 11 的周向两侧分别具有第一扣合部 13 和第二扣合部 14,每个定子齿 11的第一扣合部 13和与其相邻的定子齿 11的第二扣合 部 14卡合以形成环状的定子铁芯 1。 根据本发明实施例的电机定子, 聚磁效果更好, 且减小了定子铁芯的重量和定子绕 组的匝长, 用于电机时可减小电机的端部长度, 从而降低了成本。 此外, 根据本发明 实施例的电机定子可以用于空调电机、 洗衣机电机、 空气清新机电机等中。
根据本发明第二方面实施例的一种电机,包括根据本发明第一方面实施例的电机定 子 100。 根据本发明实施例的电机的其他构成例如转子等以及操作对于本领域普通技术人 员而言都是已知的, 这里不再详细描述。
在本说明书的描述中, 参考术语 "一个实施例" 、 "一些实施例" 、 "示意性实施 例" 、 "示例" 、 "具体示例" 、 或 "一些示例" 等的描述意指结合该实施例或示例 描述的具体特征、 结构、 材料或者特点包含于本发明的至少一个实施例或示例中。 在 本说明书中, 对上述术语的示意性表述不一定指的是相同的实施例或示例。 而且, 描 述的具体特征、 结构、 材料或者特点可以在任何的一个或多个实施例或示例中以合适 的方式结合。
尽管已经示出和描述了本发明的实施例, 本领域的普通技术人员可以理解: 在不脱 离本发明的原理和宗旨的情况下可以对这些实施例进行多种变化、 修改、 替换和变型, 本发明的范围由权利要求及其等同物限定。

Claims

权利要求书
I、 一种电机定子, 其特征在于, 包括:
定子铁芯, 所述定子铁芯形成为环状且包括沿周向分布的多个定子齿, 相邻的所述 定子齿之间限定出用于绕制绕组的定子槽, 所述定子齿上沿径向的第一端具有齿靴且 第二端具有轭部;
多个凸台, 所述多个凸台分别设在多个定子齿的沿轴向的至少一端端面上, 所述凸 台包括齿根和与所述齿根连接的齿冠, 所述齿冠位置对应于相应的所述定子齿的所述 齿靴的位置。
2、 根据权利要求 1所述的电机定子, 其特征在于, 所述定子齿和所述凸台的个数 相等, 且所述凸台位于所述定子铁芯的同一侧端面上。
3、 根据权利要求 1所述的电机定子, 其特征在于, 所述定子齿的个数为 n, 所述 凸台的个数为 2n, 其中每个定子齿的两个轴向端面上均具有所述凸台。
4、 根据权利要求 1所述的电机定子, 其特征在于, 每个所述凸台由多个硅钢片沿 所述轴向冲制成一体。
5、 根据权利要求 1所述的电机定子, 其特征在于, 在所述轴向上, 每个所述凸台 的齿冠的形状与其对应的所述齿靴的形状吻合。
6、 根据权利要求 1所述的电机定子, 其特征在于, 所述定子齿和凸台通过铆扣方 式连接。
7、 根据权利要求 1所述的电机定子, 其特征在于, 所述定子齿和凸台沿轴向冲制 成一体。
8、 根据权利要求 1所述的电机定子, 其特征在于, 所述定子齿和凸台粘接。
9、 根据权利要求 1所述的电机定子, 其特征在于, 所述多个定子齿的轭部的外端 一体成型。
10、 根据权利要求 1所述的电机定子, 其特征在于, 所述多个定子齿的轭部一体成 型以形成环状的定子铁芯。
I I、 根据权利要求 9或 10所述的电机定子, 其特征在于, 所述定子铁芯包括沿轴 向叠压成一体的多个冲片。
12、 根据权利要求 1所述的电机定子, 其特征在于, 每个所述定子齿的周向两侧分 别具有第一扣合部和第二扣合部, 每个定子齿的第一扣合部和与其相邻的定子齿的第 二扣合部卡合以形成环状的定子铁芯。
13、 根据权利要求 12所述的电机定子, 其特征在于, 每个所述定子齿包括沿轴向 叠压成一体的多个齿冲片。
14、 根据权利要求 1-13中任一项所述的电机定子, 其特征在于, 所述凸台的第一 端端面上形成有沿所述轴向延伸的第一通槽, 且所述定子齿上有与所述第一通槽连通 的第二通槽。
15、 一种电机, 其特征在于, 包括根据权利要求 1-14中任一项所述的电机定子。
PCT/CN2014/080882 2014-06-26 2014-06-26 电机定子和具有其的电机 WO2015196432A1 (zh)

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CN101951041A (zh) * 2010-08-17 2011-01-19 浙江大学 模块化组合式电机定子结构及其应用
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