KR102605537B1 - Stator - Google Patents

Abstract

The stater is initiated. The stator of the present invention includes a plate forming an opening at the center and having a plurality of holes arranged along the outer circumference, a plurality of pole shoes each coupled to the plurality of holes, and a plurality of pole shoes on the sides of the plurality of pole shoes. It includes a plurality of coils that are each inserted, and each of the plurality of pole shoes is made of a material containing soft magnetic powder, and may be formed to extend in a direction from the center toward the outer periphery.

Description

Stater {STATOR}

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

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

The stator is also called a stator and serves to drive the rotor by generating a rotating magnetic field. Conventional stator cores were manufactured by laminating steel plates. For example, the stator core was made by laminating silicon steel sheets. This stator core had a problem in that its weight increased due to the steel plate. Additionally, there was a problem that it was expensive.

As the demand for electric vehicles has recently increased, the need for motors that can lighten electric vehicles is increasing. Accordingly, the demand for stators that can be manufactured using materials lighter than steel plates is also increasing.

Korean Patent Publication No. 10-1979341

The present invention aims to solve the above-mentioned problems 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 objects, a plate forming an opening in the center and having a plurality of holes disposed along the outer circumference, and a plurality of pole shoes each coupled to the plurality of holes ( pole shoe) and a plurality of coils respectively inserted into side surfaces of the plurality of pole shoes, wherein each of the plurality of pole shoes is formed of a material containing soft magnetic powder, and extends in a direction from the center toward the outer periphery. A stator formed may be provided.

The effect of the stator according to the present invention is described as follows.

According to at least one of the embodiments of the present invention, it is possible to provide a stator that is lightweight by being manufactured from soft magnetic powder.

According to at least one of the embodiments of the present invention, a stator with improved efficiency can be provided by being manufactured from soft magnetic powder.

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

According to at least one of the embodiments of the present invention, a stator with an improved shape can be provided by varying the compression direction depending on the member.

Further scope of 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 may be clearly understood by those skilled in the art, the detailed description and specific embodiments, such as preferred embodiments of the present invention, should be understood as being given by way of example only.

Figure 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 portion of the stator 20 of the motor 10 in FIG. 1.
FIG. 3 is a diagram showing the plate 100 of FIG. 2.
FIG. 4 is a diagram showing the coil 200 of FIG. 2.
FIG. 5 is a diagram showing the pole shoe 300 of FIG. 2.
FIG. 6 is a view of the pole shoe 300 of FIG. 5 viewed from below.
FIG. 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 AA, showing the stator with the first guide protrusion 130 formed on a plate.
FIG. 9 is a cross-sectional view of the stator 20 of FIG. 2 taken along AA, showing the stator with the second guide protrusion 140 formed on the plate.
Figure 10 is a diagram 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 diagram showing the second pole shoe 1330 of FIG. 10.
Figure 13 is a diagram 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.
Figure 15 is a flowchart of a stator manufacturing method (S10) according to an embodiment of the present invention.

Hereinafter, embodiments disclosed in the present specification will be described in detail with reference to the attached drawings. However, identical or similar components will be assigned the same reference numbers regardless of reference numerals, and duplicate descriptions thereof will be omitted. The suffixes “module” and “part” for components used in the following description are given or used interchangeably only for the ease of preparing the specification, and do not have distinct meanings or roles in themselves. Additionally, in describing the embodiments disclosed in this specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed descriptions will be omitted. In addition, the attached drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the attached drawings, and all changes included in the spirit and technical scope of the present invention are not limited. , should be understood to include equivalents or substitutes.

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

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

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

In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

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

In cases where an embodiment can be implemented differently, a specific process sequence may be performed differently from the described sequence. For example, two processes described in succession may be performed substantially at the same time, or may be performed in an order opposite to that in which they are described.

In the following embodiments, when membranes, regions, components, etc. are connected, not only are the membranes, regions, and components directly connected, but also other membranes, regions, and components are interposed between the membranes, regions, and components. This includes cases where it is indirectly connected. For example, in this specification, when membranes, regions, components, etc. are said to be electrically connected, not only are the membranes, regions, components, etc. directly electrically connected, but also other membranes, regions, components, etc. are interposed between them. This also includes cases of indirect electrical connection.

Figure 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 portion of the stator 20 of the motor 10 in 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.

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

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

The pole shoe 300 may be formed extending from the bottom to the top. The lower end of the pole shoe 300 may be coupled to the plate 100. The longitudinal direction of the pole shoe 300 may be vertical. There may be a plurality of pole shoes 300.

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 the 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 have the shape of a plate. For example, the insulating plate 400 may have the shape of a disk. The insulating plate 400 may include an upper surface. The insulating plate 400 may be positioned on the pole shoe 300. The insulating plate 400 may face the pole shoe 300 . For example, the lower surface of the insulating plate 400 may face the upper surface of the pole shoe 300. For example, the lower surface of the insulating plate 400 may be in contact with the 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. In Figure 1, the top surface of the rotor 500 can be observed. The rotor 500 may face the insulating plate 400. For example, the lower surface of the rotor 500 may face the upper surface of the insulating plate 400.

FIG. 3 is a diagram showing the plate 100 of FIG. 2. In Figure 3, the top surface of the plate 100 can be observed.

Referring to FIG. 3, the plate 100 may include a plate body 110. The plate body 110 may be in the shape of a disk. The plate body 110 may have an opening 101 formed at its center. The opening 101 may penetrate 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 refer to a plane perpendicular to the vertical direction. For example, the top surface of the plate 110 may be a horizontal surface. For example, the 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 arranged along the outer circumference of the plate body 110. There may be a plurality of holes 120. A plurality of holes 120 may penetrate the plate body 110 in the longitudinal direction of the plate 100. A plurality of holes 120 may be located between the opening 101 and the outer periphery of the plate body 110.

A plurality of holes 120 may be arranged along the outer periphery of the plate body 110. The plurality of holes 120 may be arranged parallel to the outer periphery 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 arranged sequentially and spaced apart at regular intervals. The shapes of the plurality of holes 120 may be the same.

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

The first surface 111 may be formed along the outer periphery 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 the vertical direction. The longitudinal cross-section of the first surface 111 may be in the shape of a circular arc. For another example, the first surface 111 may be a surface formed by extending line segments located on a horizontal plane in the vertical direction. The longitudinal cross section of the first surface 111 may be in the form of a line segment.

The first side 111 may be formed by extending from one end to the other end. The direction from one end of the first surface 111 to the other end of the first surface 111 may be clockwise. The first surface 111 may be formed by 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 by extending from one end of the first surface 111 to the other end of the first surface 111 parallel to the outer periphery of the plate body 110.

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

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 in a horizontal plane in the vertical direction. The longitudinal cross-section of the second surface 112 may be in the shape of a circular arc. For another example, the second surface 112 may be a surface formed by extending line segments located on a horizontal plane in the vertical direction. The longitudinal cross section of the second surface 112 may be in the form of a line segment.

The second surface 112 may be formed by extending from one end to the other end. The direction from one end of the second surface 112 to the other end of the second surface 112 may be clockwise. The second surface 112 may be formed by 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 by extending 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 side 112 may face the first side 111. The second side 112 may be located opposite the first side 111. The second side 112 may be spaced apart from the first side 111 . The second side 112 may be adjacent to the opening 101 . For example, the second side 112 may be disposed closer to the opening 101 than the first side 111. The opening 101, the second surface 1120, the first surface 111, and the outer periphery of the plate body 110 may be arranged sequentially. 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 the radial direction of the plate 100.

The circumferential length of the second side 112 may be shorter than the circumferential length of the first side 111. The direction from the center of the first surface 111 to 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 located around each hole 120. The third surface 113 may be formed by extending from one end of the first surface 111 to one end of the second surface 112. The direction from one end of the first surface 111 to one end of the second surface 112 may be parallel to the radial direction of the plate 100.

The plate body 110 may include a fourth surface 114 located around each hole 120. The fourth side 114 may be formed by extending from the other end of the first side 111 to the other end of the second side 112. The 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 side 114 may face the third side 113. The fourth side 114 may be located opposite the third side 113.

The hole 120 may be surrounded by a first side 111, a second side 112, a third side 113, and a fourth side 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 by penetrating 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). The coil 200 may be formed in plural pieces.

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. The longitudinal cross-section of the coil outer member 211 may be in the shape of a circular arc. The direction from one end of the coil outer member 211 to the other end of the coil outer member 211 may be clockwise. The coil outer member 211 may contact the first outer surface 311 of the vertical member 310 of the pole shoe 300.

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. The longitudinal cross-section of the coil inner member 212 may be in the shape of a circular arc. The direction from one end of the coil inner member 212 to the other end of the coil inner member 212 may be clockwise. The coil inner member 212 may contact 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 coil one side member 213. The coil one side member 213 may be formed by extending from one end of the coil outer member 211 to one end of the coil inner member 212. The coil side member 213 may contact the first side 313 of the vertical member 310 of the pole shoe 300.

The coil body 210 may include a coil other side member 214. The coil other side member 214 may be formed extending from the other end of the coil outer member 211 to the other end of the coil inner member 212. The coil other side member 214 may be symmetrical to the coil one side member 213 in the circumferential direction of the coil outer member 211. The coil other side member 214 may be in 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 diagram showing the pole shoe 300 of FIG. 2. FIG. 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 can 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.

Vertical member 310 may include an upper surface. The upper surface of the vertical member 310 may be parallel to the 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 cross-sectional shape of the vertical member 310 may be the same as the shape of the hole 120 in the cross-section of the plate 100. 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 311, a first inner side 312, a first one side 313, and a first other side 314. .

The first outer surface 311 may be formed to extend from one end to the other end. The longitudinal cross-section of the first outer surface 311 may be in the shape of a circular arc. The direction from one end of the first outer surface 311 to the other end of the first outer surface 311 may be clockwise. 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 surface 312 may be formed to extend from one end to the other end. The longitudinal cross-section of the first inner surface 312 may be in the shape of a circular arc. The direction from one end of the first inner surface 312 to the other end of the first inner surface 312 may be clockwise. One end of the first inner surface 312 and the other end of the first inner surface 312 may be located 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. The circumferential length of the first inner surface 312 may be shorter than the circumferential length of the first outer surface 311. 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 side 313 may be formed by extending from one end of the first outer side 311 to one end of the first inner side 312 .

The first other side surface 314 may be formed by extending from the other end of the first outer surface 311 to the other end of the first inner surface 312. The first other side 314 may be symmetrical to the first one side 313 in the circumferential direction of the first outer side 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 bottom of the vertical member 310. The fitting member 320 may be inserted into the hole 120 of the plate 100 and coupled to 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. Fitting member 320 may include side surfaces 321, 322, 323, and 324. The sides 321, 322, 323, and 324 of the fitting member 320 may include at least one of a second outer side 321, a second inner side 322, a second one side 323, and a second other side 324. .

The second outer surface 321 may be formed by extending from one end to the other end. The longitudinal cross-section of the second outer surface 321 may be in the shape of a circular arc. The direction from one end of the second outer surface 321 to the other end of the second outer surface 321 may be clockwise. 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. The distance between the first outer surface 311 and the second outer surface 321 may be referred to as the first separation distance D1. As the first separation distance D1 is longer, the step between the vertical member 310 and the fitting member 320 may increase. The longer the first separation distance D1, the easier it can be to manufacture the pole shoe 300 by compressing it in the vertical direction.

One end of the second outer surface 321 may contact the first one side surface 313 of the vertical member 310. The other end of the second outer surface 321 may be in 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. The longitudinal cross-section of the second inner surface 322 may be in the shape of a circular arc. The direction from one end of the second inner surface 322 to the other end of the second inner surface 322 may be clockwise. One end of the second inner surface 322 and the other end of the second inner surface 322 may be located 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. The 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 322 may contact the first one side 313 of the vertical member 310. The other end of the second inner surface 322 may be in 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 side surface 323 may be formed by extending from one end of the second outer surface 321 to one end of the second inner surface 322 . The second side 323 may contact the first side 313 of the vertical member 310.

The second other side surface 324 may be formed by extending 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 to 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 locking member 330. The locking member 330 may be formed on the upper side of the pole shoe 300. The locking member 330 may be formed to protrude from the upper side of the pole shoe 300 in the circumferential direction of the plate 100. The locking member 330 may be formed to protrude in the circumferential direction of the plate 100 beyond the upper side of the vertical member 310.

The locking member 330 may include an upper surface. The upper surface of the locking member 330 may be located 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 sides 331, 332, 333, and 334 of the locking member 330 may include at least one of a third outer side 331, a third inner side 332, a third one side 333, and a third other side 334. there is.

The third outer surface 331 may be formed by extending from one end to the other end. The longitudinal cross-section of the third outer surface 331 may be in the shape of a circular arc. The direction from one end of the third outer surface 331 to the other end of the third outer surface 331 may be clockwise. One end of the third outer surface 331 and the other end of the third outer surface 331 may be located 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 surface 332 may be formed by extending from one end to the other end. The longitudinal cross-section of the third inner surface 332 may be in the shape of a circular arc. The direction from one end of the third inner surface 332 to the other end of the third inner surface 332 may be clockwise. One end of the third inner surface 332 and the other end of the third inner surface 332 may be located 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 circular arc of the third inner surface 332 may be the same as the radius of the circular arc of the first inner surface 312.

The circumferential length of the third inner surface 332 may be shorter than the circumferential length of the third outer surface 331. 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 side surface 333 may be formed by extending from one end of the third outer surface 331 to one end of the third inner surface 332. The third side 333 may be spaced apart from the first side 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 by extending 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 to 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 locking member 330, a portion that protrudes in the circumferential direction of the plate 100 beyond the first side 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 to extend from the first side 313 of the vertical member 310 to the third side 333 of the locking member 330. The first lower surface 335a may be inclined upward as it moves away from the first side 313. When manufacturing the pole shoe 300 by compressing it in the longitudinal direction (up and down direction) of the pole shoe 300, the corner where the first lower surface 335a and the first side 313 meet due to the shape of the first lower surface 335a It may become easier to manufacture the part.

A portion of the locking member 330 that protrudes from the first other side surface 314 of the vertical member 310 in the circumferential direction of the plate 100 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 314 of the vertical member 310 to the third other side 334 of the locking member 330. The second lower surface 336a may be inclined upward as it moves away from the first other side surface 314. When manufacturing the pole shoe 300 by compressing it in the longitudinal direction (up and down direction) of the pole shoe 300, the corner where the second lower surface 336a and the first other side 314 meet due to the shape of the second lower surface 336a It may become easier to manufacture the part.

FIG. 7 is a cross-sectional view of the stator 20 of FIG. 2 taken along A-A. Referring to FIG. 7, the fitting member 320 may be coupled to the hole 120 (see FIG. 2) of the plate 100. 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 cavity 220 (see FIG. 4) of the coil 200. The fitting member 320 of the pole shoe 300 can be coupled to the plate 100 while the coil 200 is inserted into the pole shoe 300. The lower surface of the coil 200 may be in contact with the upper surface of the plate body 110.

FIG. 8 is a cross-sectional view of the stator 20 of FIG. 2 taken along A-A, showing the stator with the 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 protrusions 130 may be formed in plural pieces and spaced apart from each other.

The lower side of the pole shoe 300 may be supported by the first guide protrusion 130. Due to the first guide protrusion 130, it may become easier to determine the location of the hole 120. Due to the first guide protrusion 130, the area where adhesive can be applied increases, and 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 be in contact with 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 with the second guide protrusion 140 formed on the plate. The second guide protrusion 140 may be formed around the hole 120 (see FIG. 2) to protrude 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 protrusions 140 may be formed in plural numbers and spaced apart from each other. The second guide protrusion 140 may form an outlet 150 that communicates with the hole 120. The outlet 150 may be formed to be 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 escape through the outlet 150 to the lower part 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 be in contact with the upper surface of the second guide protrusion 140. Due to the second guide protrusion 140, it may be easier to set the position of the lower surface of the pole shoe 300.

Figure 10 is a diagram 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 can be manufactured by compressing a material containing 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 be formed to extend from the lower side 1301 to the upper side 1302.

The first vertical member 1310 may include an upper surface. The top surface of the first vertical member 1310 may be parallel to the top surface of the plate 100 (see FIG. 2). The first coupling groove 1315 may be formed concavely on the upper surface of the first vertical member 1310. The first coupling groove 1315 has a shape extending in the radial direction of the plate 100 and may be 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 cross-sectional shape of the first vertical member 1310 may be the same as that 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 sides 1311, 1312, 1313, and 1314 of the first vertical member 1310 include a first outer side 1311, a first inner side 1312, a first one side 1313, and a first other side 1314. It may include at least one of:

The first outer surface 1311 may be formed to extend from one end to the other end. The longitudinal cross-section of the first outer surface 1311 may be in the shape of a circular arc. The direction from one end of the first outer surface 1311 to the other end of the first outer surface 1311 may be clockwise. One end of the first outer surface 1311 and the other end of the first outer surface 1311 may be located 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. The longitudinal cross-section of the first inner surface 1312 may be in the shape of a circular arc. The direction from one end of the first inner surface 1312 to the other end of the first inner surface 1312 may be clockwise. One end of the first inner surface 1312 and the other end of the first inner surface 1312 may be located 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 pole shoe 1305 is coupled to the plate 100 (see FIG. 2), the first inner surface 1312 is closer to the opening 101 of the plate 100 (see FIG. 2) than the first outer surface 1311. 3) can be placed close to it. 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 side 1313 may be formed by extending from one end of the first outer side 1311 to one end of the first inner side 1312.

The first other side surface 1314 may be formed by extending 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 to 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 on the lower side of the first pole shoe 1305. The fitting member 1320 may be formed to extend downward from the bottom 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. Fitting member 1320 may include side surfaces 1321, 1322, 1323, and 1324. The sides 1321, 1322, 1323, and 1324 of the fitting member 1320 include at least a second outer side 1321, a second inner side 1322, a second one side 1323, and a second other side 1324. It can contain one.

The second outer surface 1321 may be formed by extending from one end to the other end. The longitudinal cross-section of the second outer surface 1321 may be in the shape of a circular arc. The direction from one end of the second outer surface 1321 to the other end of the second outer surface 1321 may be clockwise. One end of the second outer surface 1321 and the other end of the second outer surface 1321 may be located 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. The distance between the first outer surface 1311 and the second outer surface 1321 may be referred to as the second separation distance D2. As the second separation distance D2 becomes shorter, the step between the first vertical member 1310 and the fitting member 1320 may become smaller. When manufacturing the first pole shoe 1305 by compressing it in the radial direction of the plate 100 (see FIG. 2), the first pole shoe 1305 can be easily formed even if 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 contact the first one side surface 1313 of the first vertical member 1310. The other end of the second outer surface 1321 may contact the first other side surface 1314 of the first vertical member 1310.

The second inner surface 1322 may be formed by extending from one end to the other end. The longitudinal cross-section of the second inner surface 1322 may be in the shape of a circular arc. The direction from one end of the second inner surface 1322 to the other end of the second inner surface 1322 may be clockwise. One end of the second inner surface 1322 and the other end of the second inner surface 1322 may be located 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. The 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 surface 1322 may contact the first one side surface 1313 of the first vertical member 1310. The other end of the second inner surface 1322 may contact 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 side surface 1323 may be formed by extending from one end of the second outer surface 1321 to one end of the second inner surface 1322. The second side 1323 may contact the first side 1313 of the first vertical member 1310.

The second other side surface 1324 may be formed by extending 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 to 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 diagram 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. The upper surface of the second pole shoe 1330 may be parallel to the 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 formed convexly on the lower surface of the second pole shoe 1330. The first coupling protrusion 1337 has a shape extending in the radial direction of the plate 100 and may protrude downward.

The cross-sectional shape of the second pole shoe 1330 may be the same as the cross-sectional shape 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 sides (1331, 1332, 1333, and 1334) of the second pole shoe (1330) are one of the third outer side (1331), the third inner side (1332), the third one side (1333), and the third other side (1334). It can contain at least one.

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

The third inner surface 1332 may be formed by extending from one end to the other end. The longitudinal cross-section of the third inner surface 1332 may be in the shape of a circular arc. The direction from one end of the third inner surface 1332 to the other end of the third inner surface 1332 may be clockwise. One end of the third inner surface 1332 and the other end of the third inner surface 1332 may be located 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 surface 1332 is larger than the third outer surface 1331 of the opening 101 of the plate 100 (see FIG. 2) (see FIG. 3). ) can be placed close to. The circumferential length of the third inner surface 1332 may be shorter than the circumferential length of the third outer surface 1331. 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 combining the first pole shoe 1305 and the second pole shoe 1330, the third inner surface 1332 may be located on the same plane as the first inner surface 1312 of the first pole shoe 1305.

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

The third other side surface 1334 may be formed by extending 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 to the third one side surface 1333 in the circumferential direction of the third outer surface 1331. After combining the first pole shoe 1305 and the second pole shoe 1330, the third other side surface 1334 may be located on the same plane as the first other side surface 1314 of the first pole shoe 1305.

The second pole shoe 1330 may include locking members 1335 and 1336. The locking members 1335 and 1336 may refer to at least one of the first protrusion 1335 and the second protrusion 1336. The locking members 1335 and 1336 may be formed on the upper side of the second pole shoe 1330. The locking members 1335 and 1336 may be formed to 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 be formed to extend from the third side 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 be formed to extend from the third other 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.

Figure 13 is a diagram 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. According to FIGS. 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 on the lower side of the third pole shoe 2340 and may include a second coupling protrusion 2341 coupled to the first coupling groove 1315 (see FIG. 11) of the first pole shoe 1305. You can. The shape of the second coupling protrusion 2341 may be the same as the shape of the first coupling protrusion 1337 (see FIG. 12) of the second pole shoe 1330. The second coupling protrusion 2341 may be formed convexly on the lower surface of the third pole shoe 2340. The second coupling protrusion 2341 has a shape extending in the radial direction of the plate 100 and may 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 the shape of the first coupling groove 1315 (see FIG. 11) of the first pole shoe 1305. The second coupling groove 2342 may be formed concavely on the upper surface of the third pole shoe 2340. The second coupling groove 2342 has a shape extending in the radial direction of the plate 100 and may be open upward.

There may be a plurality of third pole shoes 2340. The plurality of third pole shoes 2340 may be coupled to each other. The pole shoes 2300 can be manufactured by combining the first pole shoes 1305 and the second pole shoes 1330 with the plurality of third pole shoes 2340. The longitudinal length of the pole shoes 2300 can be adjusted using the plurality of third pole shoes 2340 that are combined. If the longitudinal length of the pole shoe 2300 increases, the performance of the motor 10 (see FIG. 1) can be improved.

The longitudinal lengths of the first pole shoe 1305, the second pole shoe 1330, and the third pole shoe 2340 are formed to be short, so that the first pole shoe 1305, the second pole shoe 1330, and the third pole shoe 2340 are shortened. The size of each mold needed to manufacture (2340) can be miniaturized.

Figure 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 explained 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 for molding the plate 100.

For example, referring to FIG. 2, this may be a step of preparing a mold for molding the pole shoe 300. For example, referring to FIG. 10 , the mold setting step (S100) may be a step of preparing a mold for molding the first pole shoe 1305 and the second pole shoe 1330. For example, referring to Figure 13, the mold setting step (S100) may be a step of preparing a mold for molding 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 soft magnetic powder into the mold provided in the mold setting step (S100).

Soft magnetic powder may include a magnetic material that is magnetized only when an external magnetic field is applied and almost loses magnetization when the external magnetic field is removed. Soft magnetic powder may be formed by forming a coating layer containing an insulating material 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 density by compressing the soft magnetic powder injected into the mold in the powder injection step (S200). In the compression molding step (S300), the temperature of compression molding 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 (up and down direction) of the plate 100. For example, referring to FIG. 2, the pole shoe 300 may be compressed in the longitudinal direction (up and down 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 (up and down direction) of the pole shoe 1300. The longitudinal direction (up and down direction) of the pole shoe 1300 can 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 third pole shoe 2340 are compressed in the longitudinal direction (vertical direction) of the pole shoe 2300. 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 that has been compression molded in the compression molding step (S300). In the heat treatment step (S400), the heat treatment temperature may be 500 to 650°C. If 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 that has been heat treated 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 can be selectively decided.

Any or other embodiments of the present invention described above are not exclusive or distinct from each other. In certain embodiments or other embodiments of the present invention described above, each configuration or function may be used in combination or combined.

It is obvious to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential features of the present invention. The above detailed description should not be construed as restrictive in any respect 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: catching member
400: insulating plate 500: rotor
1300: pole shoe 1305: first pole 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 (6)

A plate forming an opening in the center and having a plurality of holes arranged along the outer circumference;
A plurality of pole shoes each coupled to the plurality of holes; and
It includes a plurality of coils respectively inserted into the sides of the plurality of pole shoes,
The plate is,
A second guide protrusion is formed around the hole and protrudes toward the center of the hole and is adjacent to the lower surface of the plate,
The second guide protrusion forms an outlet communicating with the hole,
The outlet is formed to be open in the vertical direction,
A portion of the adhesive applied to the upper surface of the second guide protrusion and around the hole exits through the outlet to the lower part of the outlet,
The lower surface of the pole shoe is,
Coupled in contact with the upper surface of the second guide protrusion,
Stater.
According to claim 1,
Each of the plurality of pole shoes,
It is formed of a material containing soft magnetic powder,
Formed to extend from the center toward the outer periphery,
Stater.
According to paragraph 2,
The pole shoe,
an outer surface whose cross-section is in the form of a circular arc,
an inner surface whose cross-section is in the form of an arc and which is spaced apart from the outer surface;
It is formed to extend from the center toward the outer periphery, and includes one side and the other side connecting the outer side and the inner side,
Stater.
According to clause 3,
The circumferential length of the outer surface is,
longer than the circumferential length of the inner surface,
The length of one side and the other side is,
longer than the length of the outer surface and longer than the length of the inner surface,
Stater.
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