Integrated stator sheet for a stepper motor

Abstract

The utility model discloses a kind of integrated stator sheet for stepping motor, it is related to motor equipment technical field.It includes: integrated stator sheet, multiple integrated stator sheet is formed stator block after being stacked in axial direction, the edge of integrated stator sheet entity part is formed with several winding gaps that are evenly distributed along integrated stator sheet central axis position, integrated stator sheet is evenly opened in every winding gap Relative position has assembly structure, assembly structure is used to multiple integrated stator sheet stacked into stator block When constructing multidimensional heat dissipation channel and electromagnetic field optimization structure.The utility model constructs asymmetric airflow guide structure through the heat dissipation groove array of different aperture, forms the fluid path of alternate expansion / contraction in the process of stator block stacking, makes turbulent flow effect in axial laminated gap for cooling airflow, guarantees heat dissipation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of motor equipment technology, specifically to an integrated stator lamination for a stepper motor. Background Technology

[0002] Stator segments are the core components of miniature precision drive devices, and their design needs to be customized for specific applications.

[0003] A search revealed that the Chinese utility model patent application with publication number "CN215733710U" discloses an "integrated motor stator lamination". By setting the lamination body into an octagonal structure, the heat dissipation area of ​​the lamination body can be effectively increased, thereby improving the heat dissipation efficiency and effect. Secondly, heat dissipation groove 1 and heat dissipation groove 2 are respectively opened on the four planes and four inclined surfaces of the lamination body, which can further improve the heat dissipation efficiency of the lamination body, thereby further enhancing the heat dissipation efficiency of the lamination body.

[0004] However, in actual use, the aforementioned disclosed device and similar existing devices, due to the lack of a multi-dimensional heat dissipation channel collaborative design, result in uneven airflow distribution inside the stacked stator blocks, leading to local overheating. Secondly, the electromagnetic field optimization structure of traditional stator plates is simple, making it difficult to achieve precise control of the magnetic field gradient, which easily generates harmonic interference during high-speed commutation, thereby causing rotor vibration. Utility Model Content

[0005] The purpose of this invention is to provide an integrated stator lamination for a stepper motor to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An integrated stator lamination for a stepper motor includes: an integrated stator lamination; multiple integrated stator laminations are stacked in the axial direction to form a stator block; the edge of the solid part of the integrated stator lamination has several winding notches evenly distributed along the central axis of the integrated stator lamination.

[0008] The integrated stator laminations have uniformly spaced assembly structures at relative positions within each winding notch. These assembly structures are used to construct multi-dimensional heat dissipation channels and electromagnetic field optimization structures when multiple integrated stator laminations are stacked into a stator block.

[0009] Furthermore, the integral stator lamination body has several positioning holes evenly distributed along the central axis of the integral stator lamination. The positioning holes are not connected to the winding notch, and the positioning holes are closer to the edge of the integral stator lamination body than the winding notch.

[0010] Furthermore, the assembly structure includes:

[0011] The heat dissipation slots located on both sides of the winding notch inside the integrated stator lamination have different aperture sizes. The heat dissipation slots, which are symmetrically distributed along the axis of the integrated stator lamination, maintain an equal diameter design, thereby forming an asymmetric airflow guiding structure inside the stator block.

[0012] Furthermore, the inner wall of the heat dissipation groove is provided with anti-slip texture to increase the stability of the insulating paper after installation and prevent the insulating paper from shifting during the operation of the stator block. The anti-slip texture is distributed in a ring and the spacing between the anti-slip textures is uniform and fine, which is used to increase the friction between the anti-slip texture and the insulating paper.

[0013] Furthermore, the assembly structure includes:

[0014] The magnetic protrusions located on both sides of the winding gap inside the integrated stator lamination are symmetrical wedge-shaped structures. The magnetic protrusions located on the same side edge of the integrated stator lamination form a clamping channel after adjacent integrated stator laminations are stacked. The clamping channel formed after adjacent stator laminations are stacked is converted into an electromagnetic shunt path. By controlling the stacking gap, the magnetic flux barrier generates a gradient magnetic field.

[0015] Furthermore, the magnetic protrusion surface is designed with chamfered corners to guide the insulating paper to be precisely embedded into the clamping channel when the integrated stator laminations are axially stacked, thus avoiding damage to the insulating paper.

[0016] Furthermore, the assembly structure includes:

[0017] The limiting hooks are located at the ends of the notches on both sides of the winding notch inside the integrated stator lamination. The limiting hooks located on the same side edge of the integrated stator lamination are radially distributed towards the central axis of the integrated stator lamination. The ends of each limiting hook are designed with a bevel. When multiple integrated stator laminations are axially stacked, adjacent limiting hooks form a stepped locking chamber. The edge of the insulating paper is formed into a reinforcing rib that matches the locking chamber through a hot pressing process, thus completing the limiting in three-dimensional space.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This stepper motor uses an integrated stator lamination, which constructs an asymmetric airflow guiding structure through an array of heat dissipation slots with differentiated apertures. During the stator block stacking process, an alternating expansion / contraction fluid path is formed, causing the cooling airflow to generate a turbulent effect in the axial stacking gap, ensuring heat dissipation efficiency. Secondly, the design of wedge-shaped magnetic protrusions and gradient gaps is adopted to form an electromagnetic shunt network with adjustable magnetic resistance between adjacent stator laminations, reducing harmonic interference. Furthermore, the radially distributed limit hooks form a three-dimensional constraint, which, together with the reinforcing rib structure formed by hot pressing of insulating paper, completely eliminates the risk of displacement of the insulation layer in radial reciprocating motion. Attached Figure Description

[0020] Figure 1 This is an isometric drawing of the first embodiment of the present invention;

[0021] Figure 2 This is an isometric drawing of the second embodiment of the present invention;

[0022] Figure 3 This is an isometric drawing of the third embodiment of this utility model.

[0023] In the diagram: 1. Integrated stator lamination; 2. Positioning hole; 3. Winding notch; 4.

[0024] 5. Heat dissipation groove; 6. Magnetic protrusion; 7. Limiting hook. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Before understanding the technical solution proposed in this application, it is important to understand that the specific meaning of the integrated stator lamination 1 in the prior art is a single-unit structure formed by stamping, stacking and insulating a whole silicon steel sheet.

[0027] like Figures 1-3 As shown, this solution includes: an integrated stator lamination 1.

[0028] Multiple integral stator laminations 1 are stacked in the axial direction to form a stator block. The edge of the integral stator lamination 1 has several winding notches 3 evenly distributed along the central axis of the integral stator lamination 1. The integral stator lamination 1 has an assembly structure evenly distributed in each winding notch 3. The assembly structure is used to construct a multi-dimensional heat dissipation channel and electromagnetic field optimization structure when multiple integral stator laminations 1 are stacked into a stator block. In addition, several positioning holes 2 are evenly distributed along the central axis of the integral stator lamination 1 at the integral stator lamination 1. The positioning holes 2 are not connected to the winding notches 3, and the positioning holes 2 are closer to the edge of the integral stator lamination 1 than the winding notches 3.

[0029] It should be added that in this application Figures 1 to 3 The content is to better represent the features proposed in this application by breaking down the whole silicon steel sheet into sheet-like structures for easier display.

[0030] Implementation Plan 1, Reference Figure 1As can be seen from this embodiment, the assembly structure includes: heat dissipation slots 4 disposed on both sides of the winding notch 3 within the integrated stator lamination 1. The two heat dissipation slots 4 located on the same side edge adopt a differential aperture design (Φ2.5±0.02mm on the left and Φ3.0±0.02mm on the right) to form an asymmetric airflow guiding structure. The heat dissipation slots with equal diameter and symmetrical distribution constitute an axial through-flow channel. The helical angle pattern is adjusted to a 30° rotation direction for the guide fins. The fin array with a spacing of 0.2mm can enhance the turbulence effect and improve the heat dissipation efficiency by 40%. The slots with a depth of 1.2-1.5mm, combined with the chamfer design, can guide the cooling medium to form a wall-attached flow, thereby completing the construction of a multi-dimensional heat dissipation channel.

[0031] It is worth noting that, in this embodiment, the inner wall of the heat dissipation groove 4 is provided with anti-slip texture with a spiral angle, a texture spacing of 0.2 mm, and a texture depth of 0.1 mm. It is formed by CNC milling. This texture structure can improve the static friction coefficient after the insulating paper is installed. In addition, the anti-slip texture is distributed in a ring, which increases the contact area of ​​the insulating paper.

[0032] Implementation Plan 2, Reference Figure 2 As can be seen, in this embodiment, the assembly structure includes: magnetic protrusions 5 on both sides of the winding notch 3 inside the integrated stator lamination 1. The magnetic protrusions 5 located on the same side edge of the integrated stator lamination 1 have a symmetrical wedge-shaped structure. After adjacent integrated stator laminations 1 are stacked, a progressive clamping channel is formed. The progressive clamping channel is transformed into an electromagnetic shunt path under the magnetic force characteristics of the magnetic protrusions 5. By controlling the stacking gap, the magnetic flux barrier generates a gradient magnetic field, thereby generating an electromagnetic field optimization structure. It should be added that the surface of the magnetic protrusions 5 is designed with chamfers to guide the insulating paper to be accurately embedded in the clamping channel when the integrated stator laminations 1 are axially stacked, avoiding damage to the insulating paper. In addition, it should be added that the chamfer design optimizes the direction of the magnetic lines of force, and the pressure gradient design reduces the leakage flux by 25%. At the same time, the oxide insulating layer formed on the coating surface can suppress the generation of eddy currents.

[0033] It should be noted that in this implementation scheme, by controlling the stacking gap of the integrated stator lamination 1, a pressure gradient is formed in the progressive clamping channel. The pressure gradient design ensures that the insulating paper is subjected to balanced force throughout its entire length. Compared with the anti-slip textured structure of the first implementation scheme, this scheme is more suitable for high vibration conditions.

[0034] Implementation Plan 3, Reference Figure 3As can be seen, the assembly structure in this embodiment includes: limiting hooks 6 set at the ends of the notches on both sides of the winding notch 3 inside the integrated stator lamination 1. The limiting hooks 6 located on the same side edge of the integrated stator lamination 1 are radially distributed towards the central axis of the integrated stator lamination 1. The ends of each limiting hook 6 are designed with bevels. When multiple integrated stator laminations 1 are axially stacked, adjacent limiting hooks 6 form a stepped locking chamber. The edge of the insulating paper is formed with reinforcing ribs that match the locking chamber through a hot pressing process, thus completing the limiting in three-dimensional space.

[0035] It should be noted that this implementation scheme achieves multi-directional stress compensation function through the radial distribution characteristics of the limiting hook 6. During the stacking process, the limiting hook 6 ensures that the reinforcing ribs of the insulating paper are fully embedded in the locking chamber after elastic deformation. This elastic deformation and precise embedding effectively enhance the connection stability between the insulating paper and the stator sheet. At the same time, the radial distribution allows the stress to be evenly distributed, avoiding the risk of damage to the insulating paper caused by local stress concentration.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. An integrated stator lamination for a stepper motor, comprising: The integrated stator lamination (1) is characterized by: Multiple integral stator laminations (1) are stacked in the axial direction to form a stator block. The edge of the integral stator lamination (1) has several winding notches (3) evenly distributed along the central axis of the integral stator lamination (1). The integrated stator lamination (1) has an assembly structure evenly provided at relative positions in each winding notch (3). The assembly structure is used to construct a multi-dimensional heat dissipation channel and electromagnetic field optimization structure when multiple integrated stator laminations (1) are stacked into a stator block.

2. The integrated stator lamination for a stepper motor according to claim 1, characterized in that: The integral stator lamination (1) has several positioning holes (2) evenly distributed along the central axis of the integral stator lamination (1). The positioning holes (2) are not connected to the winding notch (3), and the positioning holes (2) are closer to the edge of the integral stator lamination (1) than the winding notch (3).

3. The integrated stator lamination for a stepper motor according to claim 1, characterized in that: The assembly structure includes: The heat dissipation grooves (4) are set on both sides of the winding notch (3) inside the integrated stator (1). The two heat dissipation grooves (4) located on the same side edge of the integrated stator (1) have different aperture sizes. The heat dissipation grooves (4) are symmetrically distributed along the axis of the integrated stator (1) to maintain the same diameter design, so that an asymmetric airflow guiding structure is formed inside the stator block.

4. The integrated stator lamination for a stepper motor according to claim 3, characterized in that: The inner wall of the heat dissipation groove (4) is provided with anti-slip texture to increase the stability of the insulating paper after installation and prevent the insulating paper from shifting during the operation of the stator block. The anti-slip texture is distributed in a ring and the spacing between the anti-slip textures is uniform and fine, which is used to increase the friction between the anti-slip texture and the insulating paper.

5. The integrated stator lamination for a stepper motor according to claim 1, characterized in that: The assembly structure includes: The magnetic protrusions (5) located on both sides of the winding gap (3) in the integrated stator lamination (1) are symmetrical wedge-shaped structures. The magnetic protrusions (5) located on the same side edge of the integrated stator lamination (1) form a clamping channel after the adjacent integrated stator laminations (1) are stacked. The clamping channel formed after the adjacent stator laminations are stacked is transformed into an electromagnetic shunt path. By controlling the stacking gap, the magnetic flux barrier generates a gradient magnetic field.

6. The integrated stator lamination for a stepper motor according to claim 5, characterized in that: The surface of the magnetic protrusion (5) is designed with chamfers to guide the insulating paper to be accurately embedded into the clamping channel when the integrated stator lamination (1) is axially stacked, thus avoiding damage to the insulating paper.

7. The integrated stator lamination for a stepper motor according to claim 1, characterized in that: The assembly structure includes: The limiting hooks (6) are set at the ends of the notches on both sides of the winding notch (3) inside the integrated stator lamination (1). The limiting hooks (6) located on the same side edge of the integrated stator lamination (1) are radially distributed towards the central axis of the integrated stator lamination (1). The ends of each limiting hook (6) are designed with a bevel. When multiple integrated stator laminations (1) are axially stacked, adjacent limiting hooks (6) form a stepped locking chamber. The edge of the insulating paper is formed with a reinforcing rib that matches the locking chamber through a hot pressing process, thus completing the limiting in three-dimensional space.

Images