Motor and method of manufacturing the same

Abstract

A motor includes a rotor and an impeller. The rotor includes a rotor top surface, a rotor bottom surface, and at least two rotor lugs. The at least two rotor lugs are formed on the rotor bottom surface. The impeller is coupled to the rotor and is located above the rotor top surface. The at least two rotor lugs have different shapes.

Description

Technical Field

[0001] This application relates to motors and methods of manufacturing the same, and more particularly to motors having rotor protrusions and methods of manufacturing the same. Background Technology

[0002] Uneven rotor weight is a common problem during motor operation, especially at high speeds, which can easily cause vibration. This vibration not only reduces the motor's operational stability but can also accelerate the wear and tear on bearings and other components, thus shortening the motor's lifespan. Furthermore, existing motor designs aimed at reducing vibration can actually create fluid turbulence.

[0003] Therefore, a motor that can improve operational stability and reduce vibration is needed. Summary of the Invention

[0004] This application provides a motor including a rotor and an impeller. The rotor includes a rotor top surface, a rotor bottom surface, and at least two rotor protrusions. The at least two rotor protrusions are formed on the rotor bottom surface. The impeller is coupled to the rotor and is located above the rotor top surface. The at least two rotor protrusions have different shapes, or the at least two rotor protrusions have different shapes or sizes.

[0005] In one embodiment, at least two rotor protrusions are symmetrically arranged about a central axis of the rotor. In one embodiment, the at least two rotor protrusions have different heights. In one embodiment, the rotor further includes a rotor core, and the at least two rotor protrusions and the rotor core are made of the same material. In one embodiment, the rotor further includes a rotor housing, and the rotor housing and the rotor core are made of different materials. In one embodiment, the impeller includes an impeller cover. The outer edge of the impeller cover has at least one recess or protrusion. In one embodiment, the impeller cover is an impeller top cover or an impeller base.

[0006] This application provides a motor including a rotor and an impeller. The rotor includes a rotor top surface, a rotor bottom surface, and a rotor protrusion. The rotor protrusion is formed on the rotor bottom surface. The impeller is coupled to the rotor and located above the rotor top surface, including an impeller cover. The outer edge of the impeller cover has a non-uniform thickness, or the periphery of the impeller cover is formed by a first outer edge and a second outer edge of different thicknesses.

[0007] In one embodiment, there are at least two rotor protrusions, and the at least two rotor protrusions have different shapes. In one embodiment, the at least two rotor protrusions have different roughnesses. In one embodiment, the at least two rotor protrusions are symmetrically arranged about a central axis of the rotor. In one embodiment, the impeller cover is an impeller top cover or an impeller base. In one embodiment, the rotor further includes a rotor core, and the rotor protrusions and the rotor core are made of the same material. In one embodiment, the rotor protrusions and the rotor core are integrally formed.

[0008] This application provides a method for manufacturing a motor, including: forming a first rotor protrusion on the bottom surface of a rotor; coupling an impeller to the rotor; and forming a second rotor protrusion on the bottom surface of the rotor. The first rotor protrusion and the second rotor protrusion have different shapes.

[0009] In one embodiment, the motor manufacturing method further includes forming a recess or protrusion on the outer edge of an impeller cover plate of the impeller. In one embodiment, the motor manufacturing method further includes injection molding a rotor housing onto a rotor core of the rotor using plastic overlay. The rotor housing and the rotor core are made of different materials. In one embodiment, a first rotor protrusion and a second rotor protrusion extend away from the bottom surface of the rotor. In one embodiment, the first rotor protrusion and the second rotor protrusion are made of the same material as the rotor core of the rotor. In one embodiment, the impeller cover plate is an impeller top cover or an impeller base plate. Attached Figure Description

[0010] Although this specification concludes with claims that specifically point out and explicitly assert the rights regarded as embodiments of this application, the advantages of the embodiments of this application can be more readily apparent from the description of certain examples of the embodiments when read in conjunction with the accompanying drawings, wherein:

[0011] Figure 1 This is a schematic diagram of a motor according to some embodiments of this application.

[0012] Figure 2 This is a schematic diagram of the bottom of a rotor according to some embodiments of this application.

[0013] Figure 3 This is a bottom schematic diagram of a rotor according to some embodiments of this application, wherein the rotor housing is omitted.

[0014] Figure 4 This is a schematic diagram of a motor according to some embodiments of this application.

[0015] Figure 5 This is a top view of an impeller according to some embodiments of this application.

[0016] Figure 6This is a bottom schematic diagram of an impeller according to some embodiments of this application.

[0017] Figure 7 This is a bottom schematic diagram of a motor according to some embodiments of this application, wherein the shaded areas indicate parts that have been removed.

[0018] Figure 8A , Figure 8B This is a schematic diagram of a rotor core and rotor magnet according to some embodiments of this application, wherein the positioning structure is emphasized by dashed circles.

[0019] Figure 9A , Figure 9B This is a schematic diagram of a rotor core and rotor housing according to some embodiments of this application, wherein the positioning structure is emphasized by dashed circles.

[0020] Figure 10A , Figure 10B This is a schematic diagram of a rotor and impeller according to some embodiments of this application, wherein the positioning structure is emphasized by dashed circles.

[0021] Figure 11 This is a schematic diagram of a motor manufacturing method according to some embodiments of this application.

[0022] Explanation of reference numerals in the attached figures

[0023] 100: Motor

[0024] 110: Rotor,

[0025] 110a: Central axis,

[0026] 111: Rotor core,

[0027] 111a: Positioning structure,

[0028] 111b: Positioning structure,

[0029] 111c: Positioning structure,

[0030] 112: Rotor magnet,

[0031] 112a: Positioning structure,

[0032] 113: Rotor housing,

[0033] 113a: Positioning structure,

[0034] 113b: Positioning structure,

[0035] 114: Rotor protrusion,

[0036] 115: Rotor top surface,

[0037] 116: Rotor bottom surface,

[0038] 120: Impeller,

[0039] 120a: Positioning structure,

[0040] 121: Impeller top cover,

[0041] 121a: Part 1

[0042] 121b: Part Two

[0043] 122: Impeller chassis,

[0044] 122a: Part One

[0045] 122b: Part Two

[0046] 200: Motor manufacturing methods

[0047] 210: Steps

[0048] 220: Steps

[0049] 230: Steps

[0050] 240: Steps

[0051] 250: Steps

[0052] X: X-axis

[0053] Y: Y-axis

[0054] Z: Z-axis. Detailed Implementation

[0055] This application can be more clearly understood by referring to the following detailed description in conjunction with the accompanying drawings. It should be noted that, for ease of understanding and to maintain the simplicity of the drawings, many of the figures depict only a portion of the display device, and specific components in the figures are not drawn to scale. Furthermore, the number and dimensions of the components in the figures are for illustrative purposes only and are not intended to limit the scope of this application. Additionally, similar and / or corresponding reference numerals may be used in different embodiments, merely to clearly describe some embodiments, and do not represent any association between the different embodiments and / or structures discussed.

[0056] Throughout this application and in the appended claims, certain terms are used to refer to specific components. Those skilled in the art will understand that electronic device manufacturers may use different names to refer to the same components. This document is not intended to distinguish between components that have the same function but different names. In the following description and claims, words such as “comprising,” “containing,” and “having” are open-ended terms and should therefore be interpreted as “containing but not limited to…”. Therefore, when the terms “comprising,” “containing,” and / or “having” are used in the description of this application, they specify the presence of the corresponding feature, area, step, operation, and / or component, but do not exclude the presence of one or more of the corresponding feature, area, step, operation, and / or component.

[0057] Furthermore, relative terms such as "below" or "bottom" and "above" or "top" may be used in the embodiments to describe the relative relationship of one component of the figures to another component. It is understood that if the apparatus in the figures is flipped so that it is upside down, the component described as being on the "below" side will become the component on the "above" side.

[0058] When a component (e.g., an assembly, membrane, or region) is referred to as "on another component" or "connected to another component," it can be directly on or directly connected to another component, or there may be other components between them. Conversely, when a component is referred to as "directly on another component" or "directly connected to another component," there are no components between them. Furthermore, when a component is referred to as "on another component," there is a vertical relationship between the two in the planar view, and this component can be above or below the other component, depending on the orientation of the device.

[0059] The terms “approximately,” “substantially,” or “roughly” are generally interpreted as being within 10% of a given value or range, or as being within 5%, 3%, 2%, 1%, or 0.5% of a given value or range.

[0060] In this application, when component A overlaps component B, it is intended to include cases where there is at least partial overlap.

[0061] It is understood that although terms such as "first," "second," etc., may be used herein to describe various components, layers, and / or portions, these components, layers, and / or portions should not be limited by these terms, and these terms are only used to distinguish different components, layers, and / or portions. Therefore, a first component, layer, and / or portion discussed below may be referred to as a second component, layer, and / or portion without departing from the teachings of some embodiments of this application. Furthermore, for the sake of brevity, the terms "first," "second," etc., may not be used in the specification to distinguish different components. Without departing from the scope defined by the appended claims, the first and / or second components recited in the claims may be interpreted as any component described in the specification.

[0062] In this application, the thickness, length, and width can be measured using an optical microscope, while the thickness can be measured from a cross-sectional image obtained from an electron microscope, but is not limited to these methods. Furthermore, any two values ​​or directions used for comparison may have a certain degree of error. If the first direction is perpendicular to the second direction, the angle between the first and second directions can be between 80 and 100 degrees; if the first direction is parallel to the second direction, the angle between the first and second directions can be between 0 and 10 degrees.

[0063] It should be noted that the technical solutions provided in the different embodiments below can be substituted for, combined or mixed with each other to constitute another embodiment without violating the spirit of this application.

[0064] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It is understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the relevant art and the background or context of this application, and should not be interpreted in an idealized or overly formal manner, unless specifically defined herein.

[0065] Please see Figure 1 , Figure 1 This is a schematic diagram of a motor 100 according to some embodiments of this application.

[0066] like Figure 1 As shown, the motor 100 includes a rotor 110 and an impeller 120. The impeller 120 is coupled to the rotor 110, and the impeller 120 can be coaxial with the rotor 110 to improve the stability of the motor 100 during operation and reduce the vibration of the motor 100. The rotor 110 can be driven by electricity (electromagnetism), which in turn drives the impeller 120, and the impeller 120 can drive the surrounding fluid.

[0067] Please see Figure 2 and Figure 3 . Figure 2This is a bottom schematic diagram of rotor 110 according to some embodiments of this application. Figure 3 This is a bottom schematic diagram of a rotor 110 according to some embodiments of the present application, wherein a rotor housing 113 of the rotor 110 is omitted.

[0068] like Figure 2 and Figure 3 As shown, the rotor 110 includes a rotor core 111, a rotor magnet 112, a rotor housing 113, and a rotor protrusion 114.

[0069] The rotor core 111 has a magnetically conductive property; for example, the rotor core 111 may include a metal. For instance, the rotor core 111 may include magnetically conductive stainless steel (e.g., SUS 430 or SUS 420J2) or silicon steel. It should be noted that the materials shown here are merely examples; in practice, the rotor core 111 may also include any suitable material.

[0070] Rotor magnets 112 are disposed around rotor core 111; for example, rotor magnets 112 may surround rotor core 111. Figure 3 In one embodiment, the rotor magnet 112 is annular, such that the rotor magnet 112 completely surrounds the rotor core 111.

[0071] The rotor housing 113 covers the rotor core 111 and the rotor magnet 112. In one embodiment, the rotor housing 113 may comprise a different material from the rotor core 111. For example, the rotor housing 113 may comprise plastic. For instance, the rotor housing 113 may be molded onto the rotor core 111 and the rotor magnet 112 via plastic overmolding. In this way, the rotor housing 113 does not need to be joined to the rotor core 111 and the rotor magnet 112 using adhesives or other connecting components.

[0072] Please also refer to Figure 1 and Figure 4 . Figure 4 This is a schematic diagram of a motor 100 according to some embodiments of this application.

[0073] The rotor 110 also includes a rotor top surface 115 and a rotor bottom surface 116. The rotor top surface 115 and the rotor bottom surface 116 are opposite to each other. The rotor top surface 115 faces the impeller 120, while the rotor bottom surface 116 faces away from the impeller 120.

[0074] Impeller 120 is located above rotor top surface 115; while rotor protrusion 114 is formed on rotor bottom surface 116 and extends away from rotor bottom surface 116.

[0075] According to some embodiments of this application, there are at least two rotor protrusions 114. According to some embodiments of this application, these at least two rotor protrusions 114 are symmetrically arranged about a central axis 110a of the rotor 110. For example, Figure 4 Six rotor bumps 114 are drawn, and these six rotor bumps 114 are arranged symmetrically and evenly about the central axis 110a of the rotor 110.

[0076] The at least two rotor bumps 114 and the rotor core 111 are made of the same material. Furthermore, according to some embodiments of this application, the at least two rotor bumps 114 and the rotor core 111 may be integrally formed.

[0077] The at least two rotor protrusions 114 have different shapes. For example, the at least two rotor protrusions 114 may have different shapes or sizes. For example, the at least two rotor protrusions 114 may have different heights or roughness.

[0078] The shape of the rotor protrusion 114 can be achieved by removing a portion of the rotor protrusion 114. For example, a portion of the rotor protrusion 114 can be removed by milling, turning, drilling, grinding, etc. In this way, the shape, height, or roughness of the rotor protrusion 114 can be changed to change the weight of the rotor protrusion 114.

[0079] This improves the stability of motor 100 during operation and reduces its vibration. Furthermore, it avoids disturbing the fluid around impeller 120, reducing fluid turbulence.

[0080] According to some embodiments of this application, the rotor bump 114 and the rotor core 111 are made of different materials. Furthermore, according to some embodiments of this application, the rotor bump 114 and the rotor core 111 may not be integrally formed. For example, rotor bumps 114 made of different materials from the rotor core 111 can be attached to the rotor core 111, so that the rotor bumps 114 have different shapes, heights, or roughness.

[0081] Please see Figure 5 and Figure 6 . Figure 5 This is a top view of an impeller 120 according to some embodiments of this application. Figure 6 This is a bottom schematic diagram of an impeller 120 according to some embodiments of this application.

[0082] The impeller 120 is composed of an impeller cover plate and blades connected to the impeller cover plate. The impeller cover plate includes an impeller top cover 121 and an impeller base plate 122. The periphery of the impeller cover plate is the outer edge of either the impeller top cover 121 or the impeller base plate 122. The outer edge of the impeller top cover 121 may include a first portion 121a and a second portion 121b. The second portion 121b is recessed or protruding relative to the first portion 121a, such that the thickness of the second portion 121b is different from the thickness of the first portion 121a (for example, the thickness of the second portion 121b is less than the thickness of the first portion 121a). That is, the outer edge of the impeller top cover 121 has at least one recess or protrusion, making the thickness of the outer edge of the impeller top cover 121 uneven.

[0083] The second part 121b can be formed by removing a portion of the outer edge of the impeller top cover 121. Similarly, a portion of the outer edge of the impeller top cover 121 can be removed by milling, turning, drilling, grinding, etc. In this way, the shape, height, or roughness of the second part 121b can be changed to change the weight of the impeller 120.

[0084] This improves the stability of motor 100 during operation and reduces the vibration of motor 100.

[0085] The outer edge of the impeller chassis 122 may include a first portion 122a and a second portion 122b. The second portion 122b is recessed relative to the first portion 122a, such that the thickness of the second portion 122b is different from the thickness of the first portion 122a (for example, the thickness of the second portion 122b is less than the thickness of the first portion 122a). That is, the outer edge of the impeller chassis 122 has at least one recess or protrusion, making the thickness of the outer edge of the impeller chassis 122 non-uniform.

[0086] The second part 122b can be formed by removing a portion of the outer edge of the impeller base 122. Similarly, a portion of the outer edge of the impeller base 122 can be removed by milling, turning, drilling, grinding, etc. In this way, the shape, height, or roughness of the second part 122b can be changed to change the weight of the impeller 120.

[0087] This improves the stability of motor 100 during operation and reduces motor 100 vibration. Furthermore, it avoids disturbing the fluid at the front end of impeller 120 (around impeller top cover 121), reducing fluid turbulence.

[0088] Please see Figure 7 , Figure 7 This is a bottom schematic diagram of a motor 100 according to some embodiments of this application, wherein the shaded areas indicate parts that have been removed.

[0089] exist Figure 7 In one embodiment, a portion of two rotor bumps 114 (shown in shaded areas) is removed, such that the shape, height, or roughness of these two rotor bumps 114 (shown in shaded areas) differs from the shape, height, or roughness of the other rotor bumps 114. It should be noted that the number of rotor bumps 114 to which a portion is removed is merely an example; any number of rotor bumps 114 may have a portion removed.

[0090] Furthermore, a portion of the second part 122b of the outer edge of the impeller chassis 122 is removed, resulting in an uneven thickness of the outer edge of the impeller chassis 122, and the thickness of the second part 122b is different from the thickness of the first part 122a (the thickness of the second part 122b is less than the thickness of the first part 122a).

[0091] This improves the stability of motor 100 during operation and reduces motor 100 vibration. Furthermore, it avoids disturbing the fluid at the front end of impeller 120 (around impeller top cover 121), reducing fluid turbulence.

[0092] According to some embodiments of this application, at least a portion of a rotor protrusion 114 is removed, and a portion of the outer edge of the impeller top cover 121 is removed.

[0093] According to some embodiments of this application, a portion of the outer edge of the impeller top cover 121 is removed, and a portion of the outer edge of the impeller chassis 122 is removed.

[0094] According to some embodiments of this application, at least a portion of a rotor protrusion 114 is removed, a portion of the outer edge of the impeller top cover 121 is removed, and a portion of the outer edge of the impeller chassis 122 is removed.

[0095] According to some embodiments of this application, only a portion of the outer edge of the impeller top cover 121 is removed.

[0096] According to some embodiments of this application, only a portion of the outer edge of the impeller chassis 122 is removed.

[0097] According to some embodiments of this application, only a portion of at least one rotor bump 114 is removed.

[0098] This improves the stability of motor 100 during operation and reduces the vibration of motor 100.

[0099] Please see Figure 8A , Figure 8B , Figure 8A , Figure 8B This is a schematic diagram of a rotor core 111 and a rotor magnet 112 according to some embodiments of this application, wherein their positioning structure is emphasized by dashed circles.

[0100] like Figure 8A , Figure 8B As shown, the rotor core 111 includes a positioning structure 111a, and the rotor magnet 112 includes a positioning structure 112a. The positioning structure 111a of the rotor core 111 can be a protruding structure, corresponding to the positioning structure 112a of the rotor magnet 112. The positioning structure 112a of the rotor magnet 112 can be a groove structure, allowing the positioning structure 111a of the rotor core 111 to be accommodated therein, and restricting the movement of the positioning structure 111a of the rotor core 111 to avoid unwanted rotation between the rotor core 111 and the rotor magnet 112.

[0101] Please see Figure 9A , Figure 9B , Figure 9A , Figure 9B This is a schematic diagram of the rotor core 111 and rotor housing 113 according to some embodiments of this application, wherein their positioning structure is emphasized by dashed circles.

[0102] like Figure 9A , Figure 9B As shown, the rotor core 111 includes a positioning structure 111b and a positioning structure 111c. Positioning structure 111b is formed on the rotor top surface 115, and positioning structure 111c is formed on the rotor bottom surface 116. The rotor housing 113 includes a positioning structure 113a and a positioning structure 113b. Positioning structure 113a corresponds to positioning structure 111b, and positioning structure 113b corresponds to positioning structure 111c. This facilitates the positioning and connection of the rotor core 111 and the rotor housing 113.

[0103] Please see Figure 10A , Figure 10B , Figure 10A , Figure 10B This is a schematic diagram of a rotor 110 and an impeller 120 according to some embodiments of this application, wherein their positioning structures are emphasized by dashed circles.

[0104] like Figure 10A , Figure 10B As shown, the impeller 120 includes a positioning structure 120a. The positioning structure 120a corresponds to the positioning structures 111b and 113a. In this way, it can help to position and connect the rotor 110 and the impeller 120.

[0105] Please see Figure 11 , Figure 11 This is a schematic diagram of a motor manufacturing method 200 according to some embodiments of this application.

[0106] It should be noted that the components in motor manufacturing method 200 can correspond to the components of motor 100, and their similarities will not be elaborated here.

[0107] In step 210, a rotor housing is injection molded onto the rotor core of the rotor using plastic overlay. The rotor core has magnetic properties; for example, the rotor core may include metal. The rotor housing may include a different material than the rotor core. For example, the rotor housing may include plastic. The rotor may be the aforementioned rotor 110, the rotor core may be the aforementioned rotor core 111, and the rotor housing may be the aforementioned rotor housing 113.

[0108] In step 220, a first rotor protrusion is formed on the rotor bottom surface of the rotor. The rotor bottom surface faces away from the impeller. The first rotor protrusion is formed on the rotor bottom surface and extends away from the rotor bottom surface. The rotor bottom surface can be the aforementioned rotor bottom surface 116, the first rotor protrusion can be one of the aforementioned first rotor protrusion 114, and the impeller can be the aforementioned impeller 120. The number of first rotor protrusions can be one or more.

[0109] In step 230, the impeller is coupled to the rotor. The impeller and rotor may be coaxial (e.g., central shaft 110a).

[0110] In step 240, a second rotor bump is formed on the rotor bottom surface of the rotor. The second rotor bump is formed on the rotor bottom surface and extends away from the rotor bottom surface. The first rotor bump and the second rotor bump can be made of the same material as the rotor core. Preferably, the first rotor bump and the second rotor bump are arranged symmetrically about the central axis of the rotor, and the first rotor bump and the second rotor bump have different shapes, heights, or roughnesses. The second rotor bump can be another of the aforementioned first rotor bump 114. Furthermore, when there are multiple first rotor bumps, the second rotor bump can be formed by modifying at least one of the aforementioned first rotor bumps.

[0111] Step 250 is optional. In some embodiments of this application, step 250 is performed, that is, the motor manufacturing method 200 includes steps 210, 220, 230, 240, and 250. However, in some embodiments of this application, step 250 may not be performed, that is, the motor manufacturing method 200 only includes steps 210, 220, 230, and 240, and does not include step 250.

[0112] In step 250, a first portion and a second portion are formed on the outer edge of the impeller cover plate. The first portion has a first thickness and the second portion has a second thickness, such that the outer edge of the impeller cover plate has at least one recess or protrusion, and the thickness of the outer edge of the cover plate is uneven. For example, in one embodiment, the periphery of an impeller cover plate is composed of a first outer edge and a second outer edge with different thicknesses. The impeller cover plate can be at least one of an impeller top cover and an impeller base plate, such that the thickness of the outer edge of the impeller cover plate is uneven. The impeller top cover can be the aforementioned impeller top cover 121, and the impeller base plate can be the aforementioned impeller base plate 122.

[0113] In summary, the motor and motor manufacturing method of the present application embodiments can effectively improve the stability of the motor during operation and reduce motor vibration. Furthermore, the motor and motor manufacturing method of the present application embodiments can avoid disturbing the fluid, thereby reducing fluid turbulence. Moreover, the motor and motor manufacturing method of the present application embodiments can facilitate the positioning and assembly of motor components.

[0114] Although embodiments and advantages of this application have been described above, it should be understood that those skilled in the art can make various changes, substitutions, and modifications to this application without departing from the spirit and scope of this application. It should be noted that different embodiments can be arbitrarily combined to form other embodiments, as long as the combination conforms to the spirit of this application. Furthermore, the scope of this application is not limited to the processes, machines, manufacturing, compositions, apparatuses, methods, and steps described in the specific embodiments of the specification. Those skilled in the art can understand existing or developing processes, machines, manufacturing, compositions, apparatuses, methods, and steps from some embodiments of this application. Therefore, the scope of this application includes the aforementioned processes, machines, manufacturing, compositions, apparatuses, methods, and steps. Moreover, each of the appended claims constitutes a separate embodiment, and the scope of this application also includes every combination of the appended claims and embodiments.

Claims

1. A motor, characterized in that, include: A rotor, comprising: The top surface of a rotor; The bottom surface of a rotor; and At least two rotor protrusions are formed on the bottom surface of the rotor; and An impeller is coupled to the rotor and located above the top surface of the rotor. The at least two rotor bumps have different shapes.

2. The motor according to claim 1, characterized in that, The at least two rotor bumps are arranged symmetrically about one of the central axes of the rotor.

3. The motor according to claim 1, characterized in that, The at least two rotor bumps have different heights.

4. The motor according to claim 1, characterized in that, The rotor also includes a rotor core, and the at least two rotor bumps are made of the same material as the rotor core.

5. The motor according to claim 4, characterized in that, The rotor also includes a rotor housing, and the rotor housing is made of a different material than the rotor core.

6. The motor according to claim 1, characterized in that, The impeller includes an impeller cover plate, the outer edge of which has at least one recess or protrusion.

7. The motor according to claim 6, characterized in that, The impeller cover can be either an impeller top cover or an impeller base.

8. A motor, characterized in that, include: A rotor, comprising: The top surface of a rotor; The bottom surface of a rotor; and A rotor protrusion is formed on the bottom surface of the rotor; and An impeller is coupled to the rotor and located above the top surface of the rotor, wherein the outer edge of an impeller cover plate of the impeller is of non-uniform thickness.

9. The motor according to claim 8, characterized in that, The rotor bump is at least two rotor bumps, and the at least two rotor bumps have different shapes.

10. The motor according to claim 9, characterized in that, The at least two rotor bumps have different roughness.

11. The motor according to claim 9, characterized in that, The at least two rotor bumps are arranged symmetrically about one of the central axes of the rotor.

12. The motor according to claim 7, characterized in that, The impeller cover can be either an impeller top cover or an impeller base.

13. The motor according to claim 8, characterized in that, The rotor also includes a rotor core, and the rotor bumps are made of the same material as the rotor core.

14. The motor according to claim 13, characterized in that, The rotor bump is integrally formed with the rotor core.

15. A method for manufacturing a motor, characterized in that, include: A first rotor protrusion is formed on the bottom surface of a rotor. Couple an impeller to the rotor; and A second rotor protrusion is formed on the bottom surface of the rotor. The first rotor bump and the second rotor bump have different shapes.

16. The motor manufacturing method according to claim 15, characterized in that, Also includes: A recess or protrusion is formed on the outer edge of one of the impeller cover plates of the impeller.

17. The motor manufacturing method according to claim 15, characterized in that, Also includes: A rotor shell is formed by injection molding plastic onto one of the rotor cores of the rotor. The rotor housing and the rotor core are made of different materials.

18. The motor manufacturing method according to claim 15, characterized in that, The first rotor bump and the second rotor bump extend away from the bottom surface of the rotor.

19. The motor manufacturing method according to claim 15, characterized in that, The first rotor bump and the second rotor bump are made of the same material as the rotor core.

20. The motor manufacturing method according to claim 15, characterized in that, The impeller cover can be either an impeller top cover or an impeller base.

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