KR20230009166A - Stator and manufacturing method for the same - Google Patents

Abstract

A stator is disclosed. The stator of the present invention comprises: a plate forming an opening in a center part and having a plurality of holes arranged along the outer circumference; a plurality of pole shoes formed to extend from a lower end to an upper end and having the lower end coupled to the plurality of holes, respectively; and a plurality of coils coupled to sides of the plurality of pole shoes, respectively, wherein each of the plurality of pole shoes comprises: a first pole shoe formed of a material containing soft magnetic powder and coupled to the hole; and a second pole shoe coupled to an upper end of the first pole shoe, wherein the second pole shoe has an engaging member protruding from the upper end of the second pole shoe in a circumferential direction of the plate, and the coil may be disposed between the plate and the engaging member. A stator manufacturing method is disclosed. The stator manufacturing method of the present invention may comprise: a mold setting step (S100) of preparing a mold forming the pole shoes; a powder injection step (S200) of injecting the soft magnetic powder into the mold; a compression molding step (S300) of compressing the soft magnetic powder in a certain direction to mold the pole shoe; and a heat treatment step (S400) of applying the heat to the pole shoe. According to at least one of the embodiments of the present invention, a lightweight stator made of the soft magnetic powder can be provided.

Description

Stator and its manufacturing method {STATOR AND MANUFACTURING METHOD FOR THE SAME}

The present invention relates to a stator. In particular, the present invention relates to a stator manufactured by combining a plurality of members.

The present invention relates to a method for manufacturing a stator. In particular, the present invention relates to a method for manufacturing a stator using soft magnetic powder.

A stator is also called a stator and serves to drive a rotor by generating a rotating magnetic field. A conventional stator core was manufactured by laminating steel plates. For example, the stator core was made by laminating silicon steel sheets. Such a stator core has a problem in that the weight increases due to the steel plate. In addition, there was a problem that the cost was high.

Recently, as the demand for electric vehicles increases, the need for motors capable of reducing the weight of electric vehicles is increasing. Accordingly, demand for stators that can be manufactured using materials lighter than steel plates is also increasing.

Korean Registered Patent Publication No. 10-1979341

The present invention aims to solve the foregoing and other problems.

Another object of the present invention is to provide a stator manufactured by combining a plurality of members.

Another object of the present invention is to provide a lightweight stator using soft magnetic powder.

Another object of the present invention is to provide a stator with improved efficiency using soft magnetic powder.

According to one aspect of the present invention for achieving the above or other object, a plate having an opening in the center and a plurality of holes disposed along the outer circumference is formed to extend from the bottom to the top, so that the lower end is It includes a plurality of pole shoes coupled to a plurality of holes, respectively, and a plurality of coils coupled to side surfaces of the plurality of pole shoes, respectively, and each of the plurality of pole shoes is formed of a material containing soft magnetic powder. Doe includes a first pole shoe coupled to the hole, and a second pole shoe coupled to an upper end of the first pole shoe, wherein the second pole shoe protrudes from an upper end of the second pole shoe in a circumferential direction of the plate. A stator may be provided, including a hooking member, wherein the coil is disposed between the plate and the hooking member.

According to one aspect of the present invention for achieving the above or other object, a mold setting step (S100) of preparing a mold for molding a pole shoe, and a powder injection step (S200) of injecting soft magnetic powder into the mold A stator manufacturing method (S10) may be provided, including a compression molding step (S300) of compressing the soft magnetic powder in a certain direction to form the pole shoe, and a heat treatment step (S400) of applying heat to the pole shoe. .

The effects of the stator according to the present invention are described as follows.

According to at least one of the embodiments of the present invention, it is possible to provide a lightweight stator made of soft magnetic powder.

According to at least one of the embodiments of the present invention, it is possible to provide a stator made of soft magnetic powder and having improved efficiency.

According to at least one of the embodiments of the present invention, it is possible to provide a stator that can be manufactured by combining a plurality of members.

According to at least one of the embodiments of the present invention, it is possible to provide a stator having an improved form by varying the compression direction according to the member.

A further scope of the applicability of the present invention will become apparent from the detailed description that follows. However, since various changes and modifications within the spirit and scope of the present invention can be clearly understood by those skilled in the art, it should be understood that the detailed description and specific examples such as preferred embodiments of the present invention are given by way of example only.

1 is a perspective view of a motor 10 according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a part of the stator 20 in the motor 10 of FIG. 1 .
FIG. 3 is a view showing the plate 100 of FIG. 2 .
FIG. 4 is a diagram showing the coil 200 of FIG. 2 .
FIG. 5 is a view showing the pole shoe 300 of FIG. 2 .
6 is a view of the pole shoe 300 of FIG. 5 viewed from below.
7 is a cross-sectional view of the stator 20 of FIG. 2 taken along AA.
FIG. 8 is a cross-sectional view of the stator 20 of FIG. 2 taken along line AA, showing the stator in which the first guide protrusion 130 is formed on the plate.
FIG. 9 is a cross-sectional view of the stator 20 of FIG. 2 taken along line AA, showing the stator in which the second guide protrusion 140 is formed on the plate.
10 is a view showing a pole shoe 1300 according to another embodiment of the present invention.
FIG. 11 is a diagram showing the first pole shoe 1305 of FIG. 10 .
FIG. 12 is a view showing the second pole shoe 1330 of FIG. 10 .
13 is a view showing a pole shoe according to another embodiment of the present invention.
FIG. 14 is a diagram showing the third pole shoe 2340 of FIG. 13 .
15 is a flowchart of a stator manufacturing method S10 according to an embodiment of the present invention.

Hereinafter, the embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings, but the same or similar components are given the same reference numerals regardless of reference numerals, and redundant description thereof will be omitted. The suffixes "module" and "unit" for components used in the following description are given or used together in consideration of ease of writing the specification, and do not have meanings or roles that are distinct from each other by themselves. In addition, in describing the embodiments disclosed in this specification, if it is determined that a detailed description of a related known technology may obscure the gist of the embodiment disclosed in this specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in this specification, the technical idea disclosed in this specification is not limited by the accompanying drawings, and all changes included in the spirit and technical scope of the present invention , it should be understood to include equivalents or substitutes.

Terms including ordinal numbers, such as first and second, may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as "comprise" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

In the drawings, the size of components may be exaggerated or reduced for convenience of description. For example, since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to the illustrated bar.

When an embodiment is otherwise implementable, a specific process sequence may be performed differently from the described sequence. For example, two processes described in succession may be performed substantially simultaneously, or may be performed in an order reverse to the order described.

In the following embodiments, when it is assumed that films, regions, components, etc. are connected, not only are the films, regions, and components directly connected, but also other films, regions, and components are interposed between the films, regions, and components. This includes cases where it is connected indirectly. For example, when a film, region, component, etc. is electrically connected in this specification, not only is the film, region, component, etc. directly electrically connected, but another film, region, component, etc. is interposed therebetween. Including cases of indirect electrical connection.

1 is a perspective view of a motor 10 according to an embodiment of the present invention. FIG. 2 is a perspective view showing a part of the stator 20 in the motor 10 of FIG. 1 .

Referring to FIGS. 1 and 2 , the motor 10 may include a stator 20 . The stator 20 may include a plate 100, a coil 200, and a pole shoe 300. The motor 10 may be an axial flux motor.

The plate 100 may be in the shape of a plate. For example, the plate 100 may have a disk shape. Plate 100 may include a top surface. The plate 100 may include a lower surface positioned opposite to the upper surface of the plate 100 . The plate 100 may extend from an upper surface of the plate 100 to a lower surface. A longitudinal direction of the plate 100 may be a vertical direction.

The plate 100 may be formed of a material including metal. For example, the plate 100 may be formed of a material containing soft magnetic powder. For example, the plate 100 may be manufactured by compressing a material containing soft magnetic powder.

The pole shoe 300 may be formed to extend from the lower end to the upper end. A lower end of the pole shoe 300 may be coupled to the plate 100. The longitudinal direction of the pole shoe 300 may be up and down. The pole shoe 300 may be provided in plurality.

The coil 200 may be inserted into the pole shoe 300 . In other words, the pole shoe 300 may be inserted into and coupled to the coil 200 . A plurality of coils 200 may be provided. The plurality of coils 200 may be respectively coupled to outer surfaces of the plurality of pole shoes 300 . After the coil 200 is coupled to the pole shoe 300, the pole shoe 300 may be coupled to the plate 100.

The motor 10 may include an insulating plate 400 . The insulating plate 400 may be in the shape of a plate. For example, the insulating plate 400 may have a disk shape. The insulating plate 400 may include an upper surface. The insulating plate 400 may be positioned above the pole shoe 300 . The insulating plate 400 may face the pole shoe 300 . For example, a lower surface of the insulating plate 400 may face an upper surface of the pole shoe 300 . For example, a lower surface of the insulating plate 400 may come into contact with an upper surface of the pole shoe 300 .

The motor 10 may include a rotor 500 . The rotor 500 may be disposed on the insulating plate 400 . The rotor 500 may include an upper surface. An upper surface of the rotor 500 can be observed in FIG. 1 . The rotor 500 may face the insulating plate 400 . For example, a lower surface of the rotor 500 may face an upper surface of the insulating plate 400 .

FIG. 3 is a view showing the plate 100 of FIG. 2 . The top surface of the plate 100 can be observed in FIG. 3 .

Referring to FIG. 3 , the plate 100 may include a plate body 110 . The plate body 110 may have a disk shape. The plate body 110 may form an opening 101 at a central portion. The opening 101 may pass through the center of the plate body 110 in the longitudinal direction of the plate 100 . The longitudinal direction of the plate 110 may be, for example, a vertical direction. A horizontal plane may mean a plane perpendicular to a vertical direction. For example, an upper surface of the plate 110 may be a horizontal surface. For example, a lower surface of the plate 110 may be a horizontal surface.

The plate body 110 may include a hole 120 . The hole 120 may be disposed along the outer circumference of the plate body 110 . A plurality of holes 120 may be provided. The plurality of holes 120 may pass through the plate body 110 in the longitudinal direction of the plate 100 . The plurality of holes 120 may be located between the opening 101 and the outer circumference of the plate body 110 .

The plurality of holes 120 may be disposed along the outer circumference of the plate body 110 . The plurality of holes 120 may be arranged in parallel with the outer circumference of the plate body 110 . The plurality of holes 120 may be spaced apart from each other. For example, the plurality of holes 120 may be spaced apart at regular intervals and arranged sequentially. The shapes of the plurality of holes 120 may be identical to each other.

The plate body 110 may include a first surface 111 positioned around each hole 120 . The first surface 111 may be a surface adjacent to the outer circumference of the plate body 110 among surfaces surrounding the hole 120 .

The first surface 111 may be formed along the outer circumference of the plate body 110 . For example, the first surface 111 may be a surface formed by extending an arc located on a horizontal plane in a vertical direction. A longitudinal section of the first surface 111 may have a circular arc shape. For another example, the first surface 111 may be a surface formed by vertically extending a line segment located on a horizontal plane. A longitudinal section of the first surface 111 may be in the form of a line segment.

The first surface 111 may be formed to extend from one end to the other end. A direction from one end of the first surface 111 to the other end of the first surface 111 may be a clockwise direction. The first surface 111 may be formed extending from one end of the first surface 111 to the other end of the first surface 111 along the outer circumference of the plate body 110 . The first surface 111 may be formed extending from one end of the first surface 111 to the other end of the first surface 111 parallel to the outer circumference of the plate body 110 .

The plate body 110 may include a second surface 112 positioned around each hole 120 . The second surface 112 may be a part of the surface surrounding the hole 120 . For example, the second surface 112 may be a surface adjacent to the opening 101 among surfaces surrounding the hole 120 .

The second surface 112 may be formed along the opening 101 . For example, the second surface 112 may be a surface formed by extending an arc located on a horizontal plane in a vertical direction. A longitudinal section of the second surface 112 may have a circular arc shape. For another example, the second surface 112 may be a surface formed by extending a line segment located on a horizontal plane in a vertical direction. A longitudinal section of the second surface 112 may be in the form of a line segment.

The second surface 112 may be formed to extend from one end to the other end. A direction from one end of the second surface 112 to the other end of the second surface 112 may be a clockwise direction. The second surface 112 may be formed extending from one end of the second surface 112 to the other end of the second surface 112 along the opening 101 . The second surface 112 may be formed to extend from one end of the second surface 112 to the other end of the second surface 112 in parallel with the opening 101 .

The second surface 112 may face the first surface 111 . The second face 112 may be positioned opposite the first face 111 . The second surface 112 may be spaced apart from the first surface 111 . The second face 112 may be adjacent to the opening 101 . For example, the second surface 112 may be disposed closer to the opening 101 than the first surface 111 . The opening 101 , the second surface 1120 , the first surface 111 , and the outer periphery of the plate body 110 may be sequentially disposed. For example, the opening 101 , the second surface 112 , the first surface 111 , and the outer periphery of the plate body 110 may be arranged in a radial direction of the plate 100 .

The length of the second surface 112 in the circumferential direction may be shorter than the length of the first surface 111 in the circumferential direction. A direction from the center of the first surface 111 toward the center of the second surface 112 may be parallel to the radial direction of the plate 100 .

The plate body 110 may include a third surface 113 positioned around each hole 120 . The third surface 113 may be formed to extend from one end of the first surface 111 to one end of the second surface 112 . A direction from one end of the first surface 111 to one end of the second surface 112 may be parallel to a radial direction of the plate 100 .

The plate body 110 may include a fourth surface 114 positioned around each hole 120 . The fourth surface 114 may be formed to extend from the other end of the first surface 111 to the other end of the second surface 112 . A direction from the other end of the first surface 111 to the other end of the second surface 112 may be parallel to the radial direction of the plate 100 . The fourth surface 114 may face the third surface 113 . The fourth face 114 may be positioned opposite the third face 113 .

The hole 120 may be surrounded by the first surface 111 , the second surface 112 , the third surface 113 , and the fourth surface 114 . The first surface 111 , the second surface 112 , the third surface 113 , and the fourth surface 114 may form a boundary of the hole 120 . The pole shoe 300 may be coupled to the hole 120 . For example, a portion of the pole shoe 300 may be inserted into the hole 120 and coupled thereto.

FIG. 4 is a diagram showing the coil 200 of FIG. 2 . FIG. 4 may be a view of the coil 200 of FIG. 2 viewed from above.

Referring to FIG. 4 , the coil 200 may include a coil body 210 . The coil hollow 220 may be formed in the coil body 210 . The coil hollow 220 may be formed to penetrate the coil body 210 in the longitudinal direction of the coil 200 . The longitudinal direction of the coil 200 may be parallel to the longitudinal direction of the pole shoe 200 (see FIG. 2). A plurality of coils 200 may be formed.

The coil body 210 may include a coil outer member 211 . The coil outer member 211 may be formed to extend from one end to the other end. A longitudinal section of the coil outer member 211 may have a circular arc shape. A direction from one end of the coil outer member 211 to the other end of the coil outer member 211 may be a clockwise direction. The coil outer member 211 may come into contact with the first outer surface 311 of the vertical member 310 of the pole shoe 300 .

The coil body 210 may include a coil inner member 212 . The coil inner member 212 may be formed to extend from one end to the other end. A longitudinal section of the member 212 inside the coil may be in the form of a circular arc. A direction from one end of the coil inner member 212 to the other end of the coil inner member 212 may be a clockwise direction. The coil inner member 212 may come into contact with the first inner surface 312 of the vertical member 310 of the pole shoe 300 .

The coil inner member 212 may be spaced apart from the coil outer member 211 . The circumferential length of the coil inner member 212 may be shorter than the circumferential length of the coil outer member 211 . The center of the coil outer member 211 and the center of the coil inner member 212 may be located on the same line in the radial direction of the plate 100 .

The coil body 210 may include a member 213 on one side of the coil. The coil side member 213 may be formed to extend from one end of the coil outer member 211 to one end of the coil inner member 212 . The coil side member 213 may come into contact with the first side surface 313 of the vertical member 310 of the pole shoe 300 .

The coil body 210 may include a member 214 on the other side of the coil. The coil other member 214 may be formed to extend from the other end of the coil outer member 211 to the other end of the coil inner member 212 . The coil other member 214 may be symmetrical with the coil one side member 213 in the circumferential direction of the coil outer member 211 . The coil other side member 214 may come into contact with the first other side surface 314 of the vertical member 310 of the pole shoe 300 .

The coil outer member 211 , the coil inner member 212 , the coil one side member 213 , and the coil other side member 214 may form the coil hollow 220 .

FIG. 5 is a view showing the pole shoe 300 of FIG. 2 . 6 is a view of the pole shoe 300 of FIG. 5 viewed from below. The pole shoe 300 may be formed of a material containing soft magnetic powder. For example, the pole shoe 300 may be manufactured by compressing a material containing soft magnetic powder.

Referring to FIGS. 5 and 6 , the pole shoe 300 may include a vertical member 310 . The vertical member 310 may be formed to extend from the lower side 301 to the upper side 302 .

The vertical member 310 may include a top surface. An upper surface of the vertical member 310 may be parallel to an upper surface of the plate 100 . The vertical member 310 may include a lower surface. The lower surface of the vertical member 310 may be parallel to the upper surface of the plate 100 .

The shape of the cross section of the vertical member 310 may be the same as that of the hole 120 in the cross section of the plate 100 . The vertical member 310 may include side surfaces 311 , 312 , 313 , and 314 . The side surfaces 311 , 312 , 313 , and 314 of the vertical member 310 may include at least one of a first outer side surface 311 , a first inner side surface 312 , a first one side surface 313 and a first other side surface 314 . .

The first outer surface 311 may be formed to extend from one end to the other end. A longitudinal section of the first outer surface 311 may have a circular arc shape. A direction from one end of the first outer surface 311 to the other end of the first outer surface 311 may be a clockwise direction. One end of the first outer surface 311 and the other end of the first outer surface 311 may be located on the same line in the circumferential direction of the plate 100 .

The first inner side surface 312 may be formed to extend from one end to the other end. A longitudinal section of the first inner side surface 312 may have a circular arc shape. A direction from one end of the first inner surface 312 to the other end of the first inner surface 312 may be a clockwise direction. One end of the first inner surface 312 and the other end of the first inner surface 312 may be positioned on the same line in the circumferential direction of the plate 100 .

The first inner surface 312 may be spaced apart from the first outer surface 311 . When the pole shoe 300 is coupled to the plate 100, the first inner surface 312 may be disposed closer to the opening 101 of the plate 100 than the first outer surface 311. A length of the first inner surface 312 in the circumferential direction may be shorter than a length of the first outer surface 311 in the circumferential direction. The center of the first outer surface 311 and the center of the first inner surface 312 may be located on the same line in the radial direction of the plate 100 .

The first one side surface 313 may be formed to extend from one end of the first outer surface 311 to one end of the first inner surface 312 .

The first other side surface 314 may be formed to extend from the other end of the first outer surface 311 to the other end of the first inner surface 312 . The first other side surface 314 may be symmetrical with the first one side surface 313 in the circumferential direction of the first outer surface 311 .

The pole shoe 300 may include a fitting member 320 . The fitting member 320 may be formed on the lower side of the pole shoe 300 . The fitting member 320 may be formed to extend downward from the lower end of the vertical member 310 . The fitting member 320 may be inserted into the hole 120 of the plate 100 and coupled with the plate 100 .

The fitting member 320 may include a lower surface. After inserting the fitting member 320 into the hole 120 of the plate 100, the lower surface of the fitting member 320 may be adjacent to the lower surface of the plate 100. The fitting member 320 may include side surfaces 321 , 322 , 323 , and 324 . The side surfaces 321 , 322 , 323 , and 324 of the fitting member 320 may include at least one of a second outer side surface 321 , a second inner side surface 322 , a second one side surface 323 and a second other side surface 324 . .

The second outer surface 321 may be formed to extend from one end to the other end. A longitudinal section of the second outer side surface 321 may have a circular arc shape. A direction from one end of the second outer surface 321 to the other end of the second outer surface 321 may be a clockwise direction. One end of the second outer surface 321 and the other end of the second outer surface 321 may be located on the same line in the circumferential direction of the plate 100 .

The second outer surface 321 may be spaced apart from the first outer surface 311 of the vertical member 310 toward the center of the pole shoe 300 . A distance between the first outer surface 311 and the second outer surface 321 may be referred to as a first separation distance D1. As the first separation distance D1 increases, a step between the vertical member 310 and the fitting member 320 may increase. As the first separation distance D1 is longer, it may be easier to manufacture the pole shoe 300 by compressing it in the vertical direction.

One end of the second outer surface 321 may be in contact with the first one side surface 313 of the vertical member 310 . The other end of the second outer side surface 321 may come into contact with the first other side surface 314 of the vertical member 310 .

The second inner surface 322 may be formed to extend from one end to the other end. A longitudinal section of the second inner surface 322 may have a circular arc shape. A direction from one end of the second inner surface 322 to the other end of the second inner surface 322 may be a clockwise direction. One end of the second inner surface 322 and the other end of the second inner surface 322 may be positioned on the same line in the circumferential direction of the plate 100 .

The second inner surface 322 may be spaced apart from the first inner surface 312 of the vertical member 310 toward the center of the pole shoe 300 . A distance between the first inner surface 312 and the second inner surface 322 may be equal to the first separation distance D1.

One end of the second inner side surface 322 may be in contact with the first one side surface 313 of the vertical member 310 . The other end of the second inner side surface 322 may come into contact with the first other side surface 314 of the vertical member 310 . The center of the second outer surface 321 and the center of the second inner surface 322 may be located on the same line in the radial direction of the plate 100 .

The second one side surface 323 may be formed to extend from one end of the second outer surface 321 to one end of the second inner surface 322 . The second one side surface 323 may come into contact with the first one side surface 313 of the vertical member 310 .

The second other side surface 324 may be formed to extend from the other end of the second outer surface 321 to the other end of the second inner surface 322 . The second other side surface 324 may be symmetrical with the second one side surface 323 in the circumferential direction of the second outer surface 321 . The second other side surface 324 may be in contact with the first other side surface 314 of the vertical member 310 .

The pole shoe 300 may include a holding member 330 . The engaging member 330 may be formed on the upper side of the pole shoe 300 . The engaging member 330 may protrude from the upper side of the pole shoe 300 in the circumferential direction of the plate 100 . The engaging member 330 may protrude in the circumferential direction of the plate 100 from the upper side of the vertical member 310 .

The holding member 330 may include an upper surface. The upper surface of the hooking member 330 may be positioned on the same plane as the upper surface of the vertical member 310 . The engaging member 330 may include side surfaces 331 , 332 , 333 , and 334 . The side surfaces 331 , 332 , 333 , and 334 of the engaging member 330 may include at least one of a third outer side surface 331 , a third inner side surface 332 , a third one side surface 333 and a third other side surface 334 . there is.

The third outer surface 331 may be formed to extend from one end to the other end. A longitudinal section of the third outer surface 331 may have a circular arc shape. A direction from one end of the third outer surface 331 to the other end of the third outer surface 331 may be a clockwise direction. One end of the third outer surface 331 and the other end of the third outer surface 331 may be positioned on the same line in the circumferential direction of the plate 100 .

The third outer surface 331 may contact the first outer surface 311 of the vertical member 310 . The radius of the arc of the third outer surface 331 may be the same as the radius of the arc of the first outer surface 311 .

The third inner side surface 332 may be formed to extend from one end to the other end. A longitudinal section of the third inner surface 332 may have a circular arc shape. A direction from one end of the third inner surface 332 to the other end of the third inner surface 332 may be a clockwise direction. One end of the third inner surface 332 and the other end of the third inner surface 332 may be positioned on the same line in the circumferential direction of the plate 100 .

The third inner surface 332 may contact the first inner surface 312 of the vertical member 310 . The radius of the arc of the third inner side surface 332 may be the same as the radius of the arc of the first inner side surface 312 .

A length of the third inner surface 332 in the circumferential direction may be shorter than a length of the third outer surface 331 in the circumferential direction. The center of the third outer surface 331 and the center of the third inner surface 332 may be located on the same line in the radial direction of the plate 100 .

The third one side surface 333 may be formed to extend from one end of the third outer surface 331 to one end of the third inner surface 332 . The third one side surface 333 may be spaced apart from the first one side surface 313 of the vertical member 310 in a direction away from the center of the pole shoe 300 .

The third other side surface 334 may be formed to extend from the other end of the third outer surface 331 to the other end of the third inner surface 332 . The third other side surface 334 may be symmetrical with the third one side surface 333 in the circumferential direction of the third outer surface 331 . The third other side surface 334 may be spaced apart from the first other side surface 314 of the vertical member 310 in a direction away from the center of the pole shoe 300 .

In the engaging member 330 , a portion protruding in the circumferential direction of the plate 100 from the first side surface 313 of the vertical member 310 may be referred to as a first protrusion 335 . The first protrusion 335 may include a first lower surface 335a. The first lower surface 335a may be formed by extending from the first side surface 313 of the vertical member 310 to the third side surface 333 of the engaging member 330 . The first lower surface 335a may be inclined upward as the distance from the first one side surface 313 increases. When manufacturing the pole shoe 300 by compressing it in the longitudinal direction (vertical direction) of the pole shoe 300, the corner where the first lower surface 335a and the first one side surface 313 meet due to the shape of the first lower surface 335a It may be easier to manufacture the part.

A portion of the engaging member 330 protruding in the circumferential direction of the plate 100 from the first other side surface 314 of the vertical member 310 may be referred to as a second protrusion 336 . The second protrusion 336 may include a second lower surface 336a. The second lower surface 336a may be formed to extend from the first other side surface 314 of the vertical member 310 to the third other side surface 334 of the holding member 330 . The second lower surface 336a may be inclined upward as the distance from the first other side surface 314 increases. When manufacturing the pole shoe 300 by compressing it in the longitudinal direction (vertical direction) of the pole shoe 300, the corner where the second lower surface 336a and the first other side surface 314 meet due to the shape of the second lower surface 336a It may be easier to manufacture the part.

7 is a cross-sectional view of the stator 20 of FIG. 2 taken along line A-A. Referring to FIG. 7 , the fitting member 320 may be coupled to the hole 120 of the plate 100 (see FIG. 2 ). The fitting member 320 and the plate body 110 may be coupled using an adhesive. The adhesive may be applied around the hole 120 . After coupling, the lower surface of the fitting member 320 may be adjacent to the lower surface of the plate body 110 .

The coil 200 may be inserted into the outer surface of the pole shoe 300 . The pole shoe 300 may be inserted into the coil hollow 220 (see FIG. 4 ) of the coil 200 . The fitting member 320 of the pole shoe 300 may be coupled to the plate 100 while the coil 200 is inserted into the pole shoe 300 . A lower surface of the coil 200 may come into contact with an upper surface of the plate body 110 .

FIG. 8 is a cross-sectional view of the stator 20 of FIG. 2 taken along line A-A, showing the stator having a first guide protrusion 130 formed on a plate. The first guide protrusion 130 may be located around the hole 120 (see FIG. 2). The first guide protrusion 130 may be formed to protrude upward from the upper surface of the plate 100 .

For example, the first guide protrusion 130 may be formed in a closed curve shape along the circumference of the hole 120 . The first guide protrusion 130 may be formed in plural and spaced apart from each other.

A lower side of the pole shoe 300 may be supported by the first guide protrusion 130 . Due to the first guide protrusion 130, the location of the hole 120 may be easily identified. Due to the first guide protrusion 130, the area to which the adhesive can be applied is increased, so that the bonding force between the pole shoe 300 and the plate 100 can be increased.

At this time, the lower surface of the coil 200 may contact the upper surface of the first guide protrusion 130 .

FIG. 9 is a cross-sectional view of the stator 20 of FIG. 2 taken along A-A, showing the stator in which the second guide protrusion 140 is formed on the plate. The second guide protrusion 140 may protrude from the circumference of the hole 120 (see FIG. 2 ) toward the center of the hole 120 . The second guide protrusion 140 may be adjacent to the lower surface of the plate 100 .

For example, the second guide protrusion 140 may be formed in a closed curve shape along the circumference of the hole 120 . The second guide protrusion 140 may be formed in plurality and may be spaced apart from each other. The second guide protrusion 140 may form an outlet 150 communicating with the hole 120 . The outlet 150 may be formed to open in the vertical direction. A portion of the adhesive applied to the upper surface of the second guide protrusion 140 and around the hole 120 may pass through the outlet 150 to a lower portion of the outlet 150 . As a result, the influence of the thickness of the adhesive on the position of the lower surface of the pole shoe 300 can be minimized. In other words, even when the adhesive is excessively applied, the position of the lower surface of the pole shoe 300 can be kept constant.

The lower surface of the pole shoe 300 may contact the upper surface of the second guide protrusion 140 . Due to the second guide protrusion 140, it may be easy to set the position of the lower surface of the pole shoe 300.

10 is a view showing a pole shoe 1300 according to another embodiment of the present invention. The pole shoe 1300 may include a first pole shoe 1305 and a second pole shoe 1330 coupled to the first pole shoe 1305 . The lower side of the first pole shoe 1305 may be coupled to the hole 120 (see FIG. 2 ) of the plate 100 (see FIG. 2 ). The lower side of the second pole shoe 1330 may be coupled to the upper side of the first pole shoe 1305 .

The first pole shoe 1305 and the second pole shoe 1330 may be formed of a material containing soft magnetic powder. For example, the first pole shoe 1305 and the second pole shoe 1330 may be manufactured by compressing a material including soft magnetic powder.

FIG. 11 is a diagram showing the first pole shoe 1305 of FIG. 10 . Referring to FIGS. 10 and 11 , the first pole shoe 1305 may include a first vertical member 1310 . The first vertical member 1310 may extend from the lower side 1301 to the upper side 1302 .

The first vertical member 1310 may include an upper surface. An upper surface of the first vertical member 1310 may be parallel to an upper surface of the plate 100 (see FIG. 2 ). The first coupling groove 1315 may be concavely formed on the upper surface of the first vertical member 1310 . The first coupling groove 1315 forms a shape extending in the radial direction of the plate 100 and may open upward.

The first vertical member 1310 may include a lower surface. The lower surface of the first vertical member 1310 may be parallel to the upper surface of the plate 100 .

The shape of the cross section of the first vertical member 1310 may be the same as that of the cross section of the vertical member 310 according to an embodiment of the present invention. The first vertical member 1310 may include side surfaces 1311 , 1312 , 1313 , and 1314 . The side surfaces 1311 , 1312 , 1313 , and 1314 of the first vertical member 1310 include a first outer side surface 1311 , a first inner side surface 1312 , a first one side surface 1313 and a first other side surface 1314 . may include at least one of them.

The first outer surface 1311 may be formed to extend from one end to the other end. A longitudinal section of the first outer surface 1311 may have a circular arc shape. A direction from one end of the first outer surface 1311 to the other end of the first outer surface 1311 may be a clockwise direction. One end of the first outer surface 1311 and the other end of the first outer surface 1311 may be positioned on the same line in the circumferential direction of the plate 100 (see FIG. 2 ).

The first inner surface 1312 may be formed to extend from one end to the other end. A longitudinal section of the first inner surface 1312 may have a circular arc shape. A direction from one end of the first inner surface 1312 to the other end of the first inner surface 1312 may be a clockwise direction. One end of the first inner surface 1312 and the other end of the first inner surface 1312 may be positioned on the same line in the circumferential direction of the plate 100 (see FIG. 2 ).

The first inner surface 1312 may be spaced apart from the first outer surface 1311 . When the first pawl shoe 1305 is coupled to the plate 100 (see FIG. 2), the first inner side surface 1312 is more exposed to the opening 101 of the plate 100 (see FIG. 2) than the first outer side surface 1311. 3) can be placed close to The circumferential length of the first inner surface 1312 may be shorter than the circumferential length of the first outer surface 1311 . The center of the first outer surface 1311 and the center of the first inner surface 1312 may be located on the same line in the radial direction of the plate 100 (see FIG. 2 ).

The first one side surface 1313 may be formed to extend from one end of the first outer surface 1311 to one end of the first inner surface 1312 .

The first other side surface 1314 may be formed to extend from the other end of the first outer surface 1311 to the other end of the first inner surface 1312 . The first other side surface 1314 may be symmetrical with the first one side surface 1313 in the circumferential direction of the first outer surface 1311 .

The first pole shoe 1305 may include a fitting member 1320 . The fitting member 1320 may be formed below the first pole shoe 1305 . The fitting member 1320 may extend downward from the lower end of the first vertical member 1310 . The fitting member 1320 may be inserted into the hole 120 (see FIG. 2 ) of the plate 100 (see FIG. 2 ) and coupled to the plate 100 .

The fitting member 1320 may include a lower surface. After inserting the fitting member 1320 into the hole 120 (see FIG. 2 ) of the plate 100 (see FIG. 2 ), the lower surface of the fitting member 1320 may be adjacent to the lower surface of the plate 100 . The fitting member 1320 may include side surfaces 1321 , 1322 , 1323 , and 1324 . The side surfaces 1321 , 1322 , 1323 , and 1324 of the fitting member 1320 are at least one of a second outer side surface 1321 , a second inner side surface 1322 , a second one side surface 1323 , and a second other side surface 1324 . may contain one.

The second outer surface 1321 may be formed to extend from one end to the other end. A longitudinal section of the second outer surface 1321 may have a circular arc shape. A direction from one end of the second outer surface 1321 to the other end of the second outer surface 1321 may be a clockwise direction. One end of the second outer surface 1321 and the other end of the second outer surface 1321 may be positioned on the same line in the circumferential direction of the plate 100 (see FIG. 2 ).

The second outer surface 1321 may be spaced apart from the first outer surface 1311 of the first vertical member 1310 toward the center of the first pole shoe 1305 . A distance between the first outer surface 1311 and the second outer surface 1321 may be referred to as a second separation distance D2. As the second separation distance D2 is shortened, a step between the first vertical member 1310 and the fitting member 1320 may be reduced. When the first pole shoe 1305 is manufactured by compressing the plate 100 in the radial direction of the plate 100 (see FIG. 2 ), the first pole shoe 1305 can be easily molded even when the second separation distance D2 is small. The radial direction of the plate 100 may be referred to as the first compression direction P1.

One end of the second outer surface 1321 may come into contact with the first one side surface 1313 of the first vertical member 1310 . The other end of the second outer side surface 1321 may come into contact with the first other side surface 1314 of the first vertical member 1310 .

The second inner surface 1322 may be formed to extend from one end to the other end. A longitudinal section of the second inner surface 1322 may have a circular arc shape. A direction from one end of the second inner surface 1322 to the other end of the second inner surface 1322 may be a clockwise direction. One end of the second inner surface 1322 and the other end of the second inner surface 1322 may be positioned on the same line in the circumferential direction of the plate 100 (see FIG. 2 ).

The second inner surface 1322 may be spaced apart from the first inner surface 1312 of the first vertical member 1310 toward the center of the first pole shoe 1305 . A distance between the first inner surface 1312 and the second inner surface 1322 may be equal to the second separation distance D2 .

One end of the second inner side surface 1322 may come into contact with the first one side surface 1313 of the first vertical member 1310 . The other end of the second inner side surface 1322 may come into contact with the first other side surface 1314 of the first vertical member 1310 . The center of the second outer surface 1321 and the center of the second inner surface 1322 may be located on the same line in the radial direction of the plate 100 (see FIG. 2 ).

The second one side surface 1323 may be formed to extend from one end of the second outer surface 1321 to one end of the second inner surface 1322 . The second one side surface 1323 may come into contact with the first one side surface 1313 of the first vertical member 1310 .

The second other side surface 1324 may be formed to extend from the other end of the second outer surface 1321 to the other end of the second inner surface 1322 . The second other side surface 1324 may be symmetrical with the second one side surface 1323 in the circumferential direction of the second outer surface 1321 . The second other side surface 1324 may contact the first other side surface 1314 of the first vertical member 1310 .

FIG. 12 is a view showing the second pole shoe 1330 of FIG. 10 . Referring to FIGS. 10 and 12 , the second pole shoe 1330 may include an upper surface. An upper surface of the second pole shoe 1330 may be parallel to an upper surface of the plate 100 (see FIG. 2 ).

The second pole shoe 1330 may include a lower surface. The lower surface of the second pole shoe 1330 may be parallel to the upper surface of the plate 100 . The first coupling protrusion 1337 may be convexly formed on the lower surface of the second pole shoe 1330 . The first coupling protrusion 1337 may extend in the radial direction of the plate 100 and protrude downward.

The shape of the cross section of the second pole shoe 1330 may be the same as that of the cross section of the first vertical member 1310 of the first pole shoe 1305 . The second pole shoe 1330 may include side surfaces 1331 , 1332 , 1333 , and 1334 . The side surfaces 1331 , 1332 , 1333 , and 1334 of the second pole shoe 1330 are among the third outer surface 1331 , the third inner surface 1332 , the third one side surface 1333 , and the third other side surface 1334 . may contain at least one.

The third outer surface 1331 may be formed to extend from one end to the other end. A longitudinal section of the third outer surface 1331 may have a circular arc shape. A direction from one end of the third outer surface 1331 to the other end of the third outer surface 1331 may be a clockwise direction. One end of the third outer surface 1331 and the other end of the third outer surface 1331 may be positioned on the same line in the circumferential direction of the plate 100 (see FIG. 2 ). After the first pole shoe 1305 and the second pole shoe 1330 are coupled, the third outer surface 1331 may be positioned on the same plane as the first outer surface 1311 of the first pole shoe 1305 .

The third inner surface 1332 may be formed to extend from one end to the other end. A longitudinal section of the third inner surface 1332 may have a circular arc shape. A direction from one end of the third inner surface 1332 to the other end of the third inner surface 1332 may be a clockwise direction. One end of the third inner surface 1332 and the other end of the third inner surface 1332 may be positioned on the same line in the circumferential direction of the plate 100 (see FIG. 2 ).

The third inner surface 1332 may be spaced apart from the third outer surface 1331 . When the pole shoe 1300 is coupled to the plate 100 (see FIG. 2), the third inner side surface 1332 is more open than the third outer side surface 1331 of the plate 100 (see FIG. 2) (see FIG. 2). ) can be placed close to A length of the third inner surface 1332 in the circumferential direction may be shorter than a length of the third outer surface 1331 in the circumferential direction. The center of the third outer surface 1331 and the center of the third inner surface 1332 may be located on the same line in the radial direction of the plate 100 (see FIG. 2 ). After coupling the first pole shoe 1305 and the second pole shoe 1330, the third inner surface 1332 may be positioned on the same plane as the first inner surface 1312 of the first pole shoe 1305.

The third one side surface 1333 may be formed to extend from one end of the third outer surface 1331 to one end of the third inner surface 1332 . After the first pole shoe 1305 and the second pole shoe 1330 are coupled, the third one side surface 1333 may be positioned on the same plane as the first one side surface 1313 of the first pole shoe 1305 .

The third other side surface 1334 may be formed to extend from the other end of the third outer surface 1331 to the other end of the third inner surface 1332 . The third other side surface 1334 may be symmetrical with the third one side surface 1333 in the circumferential direction of the third outer surface 1331 . After the first pole shoe 1305 and the second pole shoe 1330 are coupled, the third other side surface 1334 may be positioned on the same plane as the first other side surface 1314 of the first pole shoe 1305 .

The second pole shoe 1330 may include engaging members 1335 and 1336 . The engaging members 1335 and 1336 may refer to at least one of the first protrusion 1335 and the second protrusion 1336 . The engaging members 1335 and 1336 may be formed on the upper side of the second pole shoe 1330 . The engaging members 1335 and 1336 may protrude from the upper side of the second pole shoe 1330 in the circumferential direction of the plate 100 (see FIG. 2 ).

The first protrusion 1335 may include a first lower surface 1335a. The first lower surface 1335a may extend from the third side surface 1333 in the circumferential direction of the plate 100 (see FIG. 2 ). The first lower surface 1335a may be formed parallel to the upper surface of the plate 100 .

The second protrusion 1336 may include a second lower surface 1336a. The second lower surface 1336a may extend from the third side surface 1334 in the circumferential direction of the plate 100 (see FIG. 2). The second lower surface 1336a may be formed parallel to the upper surface of the plate 100 .

13 is a view showing a pole shoe according to another embodiment of the present invention. FIG. 14 is a diagram showing the third pole shoe 2340 of FIG. 13 . 13 and 14, the pole shoe 2300 may further include a third pole shoe 2340 coupled between the first pole shoe 1305 and the second pole shoe 1330.

The third pole shoe 2340 is formed below the third pole shoe 2340 and may include a second coupling protrusion 2341 coupled to the first coupling groove 1315 of the first pole shoe 1305 (see FIG. 11). can The shape of the second coupling protrusion 2341 may be the same as that of the first coupling protrusion 1337 of the second pole shoe 1330 (see FIG. 12 ). The second coupling protrusion 2341 may be convexly formed on the lower surface of the third pole shoe 2340 . The second coupling protrusion 2341 may extend in the radial direction of the plate 100 and protrude downward.

The third pole shoe 2340 is formed on the upper side of the third pole shoe 2340 and may include a second coupling groove 2342 coupled to the first coupling protrusion 1337 of the second pole shoe 1330 . The shape of the second coupling groove 2342 may be the same as that of the first coupling groove 1315 (see FIG. 11 ) of the first pole shoe 1305 . The second coupling groove 2342 may be concavely formed on the upper surface of the third pole shoe 2340 . The second coupling groove 2342 may extend in the radial direction of the plate 100 and open upward.

A plurality of third pole shoes 2340 may be provided. The plurality of third pole shoes 2340 may be coupled to each other. The pole shoe 2300 may be manufactured by combining the first pole shoe 1305 and the second pole shoe 1330 to the plurality of combined third pole shoes 2340 . The longitudinal length of the pole shoe 2300 may be adjusted using the plurality of third pole shoes 2340 coupled thereto. If the longitudinal length of the pole shoe 2300 is increased, the performance of the motor 10 (see FIG. 1) may be improved.

The length of the first pole shoe 1305, the second pole shoe 1330, and the third pole shoe 2340 is formed short to form the first pole shoe 1305, the second pole shoe 1330, and the third pole shoe 2340. The size of each mold required to manufacture the 2340 can be miniaturized.

15 is a flowchart of a stator manufacturing method S10 according to an embodiment of the present invention. The stator manufacturing method (S10) can be described with reference to FIGS. 2 to 14.

The stator manufacturing method (S10) according to an embodiment of the present invention may include a mold setting step (S100). Referring to FIG. 2 , the mold setting step ( S100 ) may be a step of preparing a mold to mold the plate 100 .

For example, referring to FIG. 2 , it may be a step of preparing a mold to mold the pole shoe 300 . For example, referring to FIG. 10 , the mold setting step ( S100 ) may be a step of preparing a mold to mold the first pole shoe 1305 and the second pole shoe 1330 . For example, referring to FIG. 13 , the mold setting step ( S100 ) may be a step of preparing a mold to mold the first pole shoe 1305 , the second pole shoe 1330 , and the third pole shoe 2340 .

The stator manufacturing method ( S10 ) according to an embodiment of the present invention may include a powder injection step ( S200 ). The powder injection step (S200) may be a step of injecting the soft magnetic powder into the mold prepared in the mold setting step (S100).

The soft magnetic powder may include a magnetic material that is magnetized only when an external magnetic field is applied and substantially loses magnetization when the external magnetic field is removed. The soft magnetic powder may be a form in which a coating layer including an insulating material is formed on high-purity iron (Fe) powder.

The stator manufacturing method (S10) according to an embodiment of the present invention may include a compression molding step (S300). The compression molding step (S300) may be a step of increasing the density by compressing the soft magnetic powder injected into the mold in the powder injection step (S200). In the compression molding step (S300), the compression molding temperature may be up to 100°C. In the compression molding step (S300), the compression molding pressure may be 600 to 800 Mpa.

The plate 100 may be compressed in the longitudinal direction (vertical direction) of the plate 100 . For example, referring to FIG. 2 , the pole shoe 300 may be compressed in the longitudinal direction (vertical direction) of the pole shoe. For example, referring to FIG. 10 , the first pole shoe 1305 may be compressed in the radial direction of the plate 100 . The radial direction of the plate 100 may be referred to as the first compression direction P1. The second pole shoe 1330 may be compressed in the longitudinal direction (vertical direction) of the pole shoe 1300 . The longitudinal direction (vertical direction) of the pole shoe 1300 may be referred to as the second compression direction P2. For example, referring to FIG. 13 , the first pole shoe 1305 is compressed in the longitudinal direction (vertical direction) of the pole shoe 2300, and the second pole shoe 1330 and the third pole shoe 2340 are of the plate 100. It can be compressed in the radial direction.

The stator manufacturing method ( S10 ) according to an embodiment of the present invention may include a heat treatment step ( S400 ). The heat treatment step (S400) may be a step of applying heat to the product after compression molding in the compression molding step (S300). In the heat treatment step (S400), the heat treatment temperature may be 500 to 650 °C. When the heat treatment temperature is higher than 650° C., the coating layer of the soft magnetic powder may be destroyed.

The stator manufacturing method ( S10 ) according to an embodiment of the present invention may include a steam treatment step ( S500 ). The steam treatment step (S500) may be a step of forming iron oxide by applying steam to the product after heat treatment in the heat treatment step (S400). The steam treatment step (S500) is performed to improve the rigidity of the product, and whether or not to proceed may be selectively determined.

Any or other embodiments of the present invention described above are not mutually exclusive or distinct from each other. Certain or other embodiments of the present invention described above may be used in combination or combination of respective components or functions.

It is apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention. The above detailed description should not be construed as limiting in all respects and should be considered illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

10: motor 20: stator
100: plate 101: opening
110: plate body 120: hole
130: first guide protrusion 140: second guide protrusion
150: outlet
200: coil 210: coil body
220: coil hollow
300: pole shoe 310: vertical member
320: fitting member 330: engaging member
400: insulating plate 500: rotor
1300: fall shoe 1305: first fall shoe
1310: first vertical member 1315: first coupling groove
1320: fitting member 1330: second pole shoe
1335: first protrusion 1336: second protrusion
2340: third pole shoe 2341: second coupling protrusion
2342: second coupling groove
D1: first separation distance D2: second separation distance

Claims (7)

A plate having an opening in the center and a plurality of holes arranged along the outer periphery;
A plurality of pole shoes formed to extend from the lower end to the upper end and having lower ends coupled to the plurality of holes, respectively; And
Including; a plurality of coils respectively coupled to the side surfaces of the plurality of pole shoes,
Each of the plurality of pole shoes,
It is formed of a material containing soft magnetic powder,
A first pole shoe coupled to the hole;
A second pole shoe coupled to the upper end of the first pole shoe,
The second fall shoe,
A locking member protruding in a circumferential direction of the plate from an upper end of the second pole shoe,
The coil is
Disposed between the plate and the holding member,
stator.
According to claim 1,
The first fall shoe,
A fitting member formed below the first pole shoe and inserted into the hole;
It is formed on the upper side of the first pole shoe and includes a first coupling groove coupled to the second pole shoe,
The first coupling groove,
Forming a shape extending in the radial direction of the plate, open upward,
The second fall shoe,
It is formed on the lower side of the second pole shoe and includes a first coupling protrusion coupled to the first coupling groove.
stator.
According to claim 2,
The first fall shoe,
Formed by compression in the radial direction of the plate,
stator.
According to claim 2,
The second fall shoe,
Formed by compression in the longitudinal direction of the pole shoe,
stator.
According to claim 1,
Further comprising a third pole shoe coupled between the first pole shoe and the second pole shoe,
The first fall shoe,
A first coupling groove formed on an upper side of the first pole shoe and coupled to a lower end of the third pole shoe;
The third fall shoe,
It is formed on the upper side of the third pole shoe and includes a second coupling groove coupled to the lower end of the second pole shoe.
stator.
According to claim 5,
The first coupling groove and the second coupling groove,
Forming a shape extending in the radial direction of the plate, open upward,
stator.
A mold setting step of preparing a mold to mold the pole shoes (S100);
A powder injection step (S200) of injecting soft magnetic powder into the mold;
A compression molding step (S300) of molding the pole shoe by compressing the soft magnetic powder in a predetermined direction; And
A heat treatment step (S400) of applying heat to the pole shoe; including,
Stator manufacturing method (S10).

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