High-efficiency motor stator

Abstract

The utility model relates to the technical field of motor structures, and discloses a high-efficiency motor stator, which comprises a plurality of groups of stator iron cores, countersunk threaded holes are formed in two ends of the surfaces of the plurality of groups of stator iron cores, limiting insertion holes are formed in four corners of the surfaces of the stator iron cores, and limiting insertion columns are fixedly mounted at four corners of the bottom surfaces of the stator iron cores. Limiting clamping blocks are fixedly installed on the four side faces of the stator iron cores, threaded installation holes are formed in the two ends of the surfaces of the multiple sets of stator iron cores, countersunk threaded holes are formed in the two ends of the surfaces of the stator iron cores, fastening connection is achieved through countersunk bolts, the limiting clamping blocks are installed on the four side faces of the stator iron cores, and limiting insertion columns are arranged at the four corners of the bottom face of the stator iron cores. Through clamping of the limiting insertion columns and the limiting insertion holes in the surface of the other iron core, rapid positioning and stable splicing of multiple sets of stator iron cores are achieved, the assembling efficiency is greatly improved, in addition, limiting clamping blocks on the edges of the stator iron cores are matched with a motor shell, positioning is further limited, heat dissipation ribs are axially arranged on the outer circumferences of the stator iron cores, and the heat dissipation area is enlarged.

Description

Technical Field

[0001] This utility model relates to the field of motor structure technology, and in particular to a high-efficiency motor stator. Background Technology

[0002] An electric motor is a device that converts electrical energy into mechanical energy. It utilizes a rotating magnetic field generated by a current-carrying coil (i.e., the stator winding) to act on the rotor (such as a squirrel-cage closed aluminum frame), forming a magnetoelectric torque. Electric motors are classified into DC motors and AC motors according to the power supply they use. Most motors in power systems are AC motors, which can be synchronous motors or asynchronous motors (where the speed of the stator magnetic field and the speed of the rotor are not synchronized). An electric motor mainly consists of a stator and a rotor. The direction of the force on a current-carrying conductor in a magnetic field is related to the direction of the current and the direction of the magnetic field lines. The working principle of an electric motor is that the magnetic field exerts a force on the current, causing the motor to rotate. The stator is the main component of the electric motor, mainly composed of the stator core and stator windings.

[0003] The applicant discovered through a search that a Chinese patent discloses "A Low-Cost, High-Efficiency Motor Stator Structure," with publication (announcement) number "CN212649199U." This patent mainly includes a first stator lamination and a stator body, with the first stator lamination and the stator body being fitted together. The structures of the first and second arc grooves are identical, and their positions correspond. This utility model offers good performance and is lightweight, reducing costs. However, the existing technology relies solely on arc grooves and limiting posts to position the rotation angle of adjacent laminations. Under the vibration environment of long-term motor operation, the laminations may shift, leading to uneven air gap magnetic fields and reduced motor efficiency. Furthermore, poor heat dissipation also affects the reliability and service life of the motor. Therefore, we propose a high-efficiency motor stator. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency motor stator to solve the problems in the prior art where the rotation angle of adjacent laminations is located solely by arc grooves and limiting posts. Under the vibration environment of long-term motor operation, the laminations may shift, resulting in uneven air gap magnetic field, reduced motor efficiency, and poor heat dissipation performance, which also affects the reliability and service life of the motor.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency motor stator, comprising a stator core, wherein multiple sets of stator cores are provided, each set of stator cores having countersunk threaded holes at both ends of its surface, limit insertion holes at the four corners of its surface, and limit insertion posts fixedly installed at the four corners of its bottom surface, and limit locking blocks fixedly installed on the four sides of the stator core, threaded mounting holes at both ends of the surface of the multiple sets of stator cores, and internal studs fixedly installed at both ends of the inner side of the multiple sets of stator cores, and a heat dissipation structure provided on the outer side of the multiple sets of stator cores.

[0006] As a preferred embodiment, the stator core is made of high-permeability oriented silicon steel sheets stacked together, and multiple trapezoidal stator slots are evenly distributed on the inner circumference of the multiple sets of stator cores, with an insulating structure inside the trapezoidal stator slots.

[0007] As a preferred embodiment, the heat dissipation structure includes multiple sets of axial heat dissipation ribs arranged on the outer circumference of the stator core. Each set of heat dissipation ribs has a slot on its inner side, which is adapted to the limiting block, and the heat dissipation ribs correspond to the heat dissipation air ducts on the motor housing.

[0008] As a preferred embodiment, the four sets of limiting pins are adapted to and engaged with the four sets of limiting holes.

[0009] As a preferred embodiment, the internal threads of the multiple sets of countersunk threaded holes are connected with countersunk bolts.

[0010] As a preferred embodiment, the insulation structure includes a polyimide film insulation layer disposed between the stator core and the stator winding, and an insulating varnish impregnated at the ends of the stator winding.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. By opening countersunk threaded holes at both ends of the stator core surface and fastening them with countersunk bolts, limiting blocks are installed on its four sides and limiting pins are set at the four corners of the bottom surface. By engaging the limiting pins with the limiting pins on the surface of another core, multiple sets of stator cores can be quickly positioned and stably spliced, greatly improving assembly efficiency. In addition, the limiting blocks on the edge of the stator core cooperate with the motor housing to further restrict positioning and enhance stability. Heat dissipation fins are arranged axially on the outer circumference of the stator core to expand the heat dissipation area and improve heat dissipation efficiency.

[0013] 2. By evenly distributing multiple trapezoidal stator slots around the inner circumference of the stator core, laying a polyimide film insulation layer inside the slots, and impregnating the ends of the stator windings with insulating varnish, the risk of short circuits in the stator windings is effectively avoided. At the same time, the trapezoidal stator slots provide ample space for the winding and installation of the stator windings. In addition, the stator core is connected through threaded mounting holes, which greatly simplifies the motor maintenance and component replacement process and facilitates later maintenance. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the bottom structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the stator core structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the bottom structure of the stator core of this utility model;

[0018] Figure 5 This is a schematic diagram of the heat dissipation fin structure of this utility model.

[0019] In the diagram: 1. Stator core; 2. Stator internal stud; 3. Countersunk bolt; 4. Threaded mounting hole; 5. Limiting insertion hole; 6. Heat dissipation fin; 7. Trapezoidal stator slot; 8. Countersunk threaded hole; 9. Limiting block; 10. Limiting insertion post; 11. Slot. Detailed Implementation

[0020] 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.

[0021] Example 1:

[0022] Please see the appendix Figure 1 - Appendix Figure 5 A high-efficiency motor stator includes a stator core 1, which is provided in multiple sets. Each set of stator cores 1 has countersunk threaded holes 8 at both ends of its surface. Limiting insertion holes 5 are provided at the four corners of the surface of each stator core 1, and limiting insertion posts 10 are fixedly installed at the four corners of its bottom surface. Limiting blocks 9 are fixedly installed on all four sides of the stator core 1. Threaded mounting holes 4 are provided at both ends of the surface of each set of stator cores 1, and the inner ends of each set of stator cores 1 are fixed... The stator is equipped with internal studs 2. Multiple sets of stator cores 1 are provided with heat dissipation structures on their outer sides. The heat dissipation structures include multiple sets of axial heat dissipation fins 6 set on the outer circumference of the stator cores 1. Each set of heat dissipation fins 6 is provided with a slot 11 on its inner side. The slot 11 is adapted to the limiting block 9. The heat dissipation fins 6 are corresponding to the heat dissipation air ducts on the motor housing. Four sets of limiting plugs 10 are adapted to and engaged with four sets of limiting holes 5. The internal threads of multiple sets of countersunk threaded holes 8 are connected with countersunk bolts 3.

[0023] The stator core 1 is made of high-permeability silicon steel sheets. The silicon steel sheets are made of oriented silicon steel, which has low hysteresis loss and eddy current loss. The stator internal studs 2 can be used to firmly connect the stator with other motor components such as end covers and frame, ensuring the precise relative position of each component and maintaining the structural integrity and stability of the motor.

[0024] Specifically, countersunk threaded holes 8 are opened at both ends of the surface of the stator core 1, and countersunk bolts 3 can be threaded into them. Limiting blocks 9 are fixed on the four sides, and limiting inserts 10 are fixed at the four corners of the bottom surface. The limiting inserts 10 engage with the limiting inserts 5 at the four corners of the surface of another stator core 1. This allows for the quick positioning and stable installation of multiple sets of stator cores 1, improving assembly efficiency. The limiting blocks 9 on the edge of the stator core 1 cooperate with the motor housing to further limit the displacement of the stator core 1 and improve positioning stability. Multiple heat dissipation fins 6 are provided on the outer circumference of the stator core 1. The heat dissipation fins 6 are axially distributed, which can increase the heat dissipation area of ​​the stator core 1 and improve heat dissipation efficiency.

[0025] Example 2:

[0026] Please see the appendix Figure 1 - Appendix Figure 4 Furthermore, based on Example 1, the stator core 1 is made of high-permeability oriented silicon steel sheets stacked together. Multiple trapezoidal stator slots 7 are evenly distributed on the inner circumference of multiple sets of stator cores 1. The interior of the trapezoidal stator slots 7 is provided with an insulating structure, which includes a polyimide film insulating layer disposed between the stator core 1 and the stator winding, and an insulating varnish that impregnates the ends of the stator winding.

[0027] Multiple trapezoidal stator slots 7 are evenly distributed on the inner circumference of the stator core 1. The slot opening width is smaller than the slot bottom width, which can reduce the leakage flux at the winding end and improve the efficiency of the motor. The stator internal studs 2 can be used to securely connect the rotor or other motor components such as end covers and frame, ensuring the precise relative position of each component and maintaining the structural integrity and stability of the motor.

[0028] Specifically, by providing a polyimide film insulation layer in the trapezoidal stator slots 7 and impregnating the stator winding ends with insulating varnish, short circuits in the stator windings can be effectively prevented. The connection through the threaded mounting holes 4 makes disassembly easier during motor maintenance and component replacement, which is beneficial for later maintenance. Multiple trapezoidal stator slots 7 are evenly distributed around the inner circumference of the stator core 1. This design provides ample space for the stator windings, facilitating winding and installation.

[0029] The working principle of this utility model is as follows: This utility model is a high-efficiency motor stator. Countersunk threaded holes 8 are opened at both ends of the surface of the stator core 1, and countersunk bolts 3 are internally threaded and connected. Limiting blocks 9 are fixed on its four sides, and limiting inserts 10 are fixed at the four corners of its bottom surface. The limiting inserts 10 engage with the limiting holes 5 at the four corners of another core surface, achieving rapid positioning and stable installation of multiple sets of stator cores 1, improving assembly efficiency. The limiting blocks 9 on the edge of the stator core 1 cooperate with the motor housing to further restrict the displacement of the stator core 1, improving positioning stability. The stator core 1 has multiple axially distributed heat dissipation fins 6 on its outer circumference to increase the heat dissipation area and improve heat dissipation efficiency. Multiple trapezoidal stator slots 7 are evenly distributed on the inner circumference of the stator core 1. The slots are equipped with a polyimide film insulation layer. At the same time, the ends of the stator windings are impregnated with insulating varnish to effectively prevent short circuits in the stator windings. The stator core 1 is connected through threaded mounting holes 4, which facilitates disassembly during motor maintenance and component replacement, and is beneficial for later maintenance. The trapezoidal stator slots 7 provide sufficient winding and installation space for the stator windings. At this point, the entire process is complete.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high efficiency motor stator comprising a stator core (1), characterized in that: The stator core (1) is provided with a plurality of groups, and threaded holes (8) are arranged at both ends of the surface of the plurality of groups of stator cores (1), limit insertion holes (5) are arranged at the four corners of the surface of the stator core (1), limit insertion columns (10) are fixedly installed at the four corners of the bottom surface of the stator core (1), limit clamping blocks (9) are fixedly installed on the four side surfaces of the stator core (1), threaded mounting holes (4) are arranged at both ends of the surface of the plurality of groups of stator cores (1), and stator inner studs (2) are fixedly installed at both ends of the inner side of the plurality of groups of stator cores (1), and the outer side of the plurality of groups of stator cores (1) is provided with a heat dissipation structure.

2. The high efficiency electric machine stator of claim 1, wherein: The stator core (1) is made of oriented silicon steel sheets with high magnetic permeability, and a plurality of trapezoidal stator slots (7) are uniformly distributed on the inner circumference of the plurality of groups of stator cores (1), and the trapezoidal stator slots (7) are provided with an insulation structure.

3. The high efficiency motor stator of claim 1, wherein: The heat dissipation structure includes a plurality of groups of heat dissipation ribs (6) arranged on the outer circumference of the stator core (1), the inner side of the plurality of groups of heat dissipation ribs (6) is provided with a clamping groove (11), the clamping groove (11) is matched with the limit clamping block (9), and the heat dissipation rib (6) corresponds to the heat dissipation air duct on the motor shell.

4. The high efficiency motor stator of claim 1, wherein: Four groups of limit insertion columns (10) are matched with and clamped to four groups of limit insertion holes (5).

5. The high efficiency motor stator of claim 1, wherein: The inner threads of a plurality of groups of threaded holes (8) are connected with countersunk bolts (3).

6. The high efficiency motor stator of claim 2, wherein: The insulation structure includes a polyimide film insulation layer arranged between the stator core (1) and the stator winding, and an insulation paint for impregnating treatment of the end portion of the stator winding.

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