Motor stator and motor

Abstract

The utility model discloses a motor stator and a motor, and relates to the technical field of motors, the motor stator comprises a stator tooth module, a stator yoke module and a plurality of winding coils, the stator tooth module comprises a plurality of stator tooth modules which are sequentially connected along the circumferential direction of the motor stator, each stator tooth module comprises at least one stator tooth, and the winding coils are wound around the stator tooth module. Any two adjacent stator teeth are arranged at intervals along the circumferential direction of the motor stator to form stator slots; the stator yoke module comprises a plurality of stator yoke modules which are sequentially connected along the circumferential direction of the motor stator, and the plurality of stator yoke modules jointly surround the periphery of the stator tooth module and seal the openings of all stator slots; the winding coils are correspondingly accommodated in the stator grooves; wherein the stator tooth module and the stator yoke module are spliced into a whole. The utility model aims to effectively avoid the problems of serious air-gap magnetic field distortion, large cogging torque and torque pulsation, large stray loss, high temperature rise and high noise of the open slot of the high-voltage motor caused by cogging effect.

Description

Technical Field

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

[0002] High-voltage motors are widely used electric motors in industrial fields. They operate at higher voltages, thus providing greater power output. These motors are typically used in applications with extremely high power and reliability requirements, such as coal mines and wind power generation. The structure of a high-voltage motor mainly includes a stator, rotor, and windings, with the air gap between the stator and rotor being a critical area for motor operation.

[0003] The existing stator slot structure of high-voltage motors is mainly an open slot design. This design facilitates the unwinding and installation of the windings. In the open slot structure, the windings are usually wrapped with insulating materials such as polyimide film and mica tape and then installed in the stator slots. This structure allows the windings to have a certain amount of movement space in the slots, thereby adapting to the thermal expansion and mechanical vibration during motor operation.

[0004] However, the existing open-slot structure of high-voltage motors has some problems. First, the open-slot structure leads to an increase in the effective air gap length, causing cogging effect, resulting in severe distortion of the air gap magnetic field and increased harmonic content. These problems lead to increased stray losses during motor operation, which in turn causes increased motor temperature rise and electromagnetic noise. In addition, the increase in cogging torque and torque pulsation also affects the smooth operation of the motor. To reduce these effects, although magnetic slot wedges or closed-slot structures can be used, magnetic slot wedges are at risk of falling off or breaking, and their mechanical strength is relatively poor. They also require a high degree of fit during installation. Magnetic slot wedges can also generate additional losses due to eddy currents, affecting motor efficiency and temperature rise. Although the closed-slot structure can reduce cogging effect, its application in high-voltage motors is limited because it cannot be manufactured in production lines. Utility Model Content

[0005] The main purpose of this invention is to propose a motor stator and motor that effectively avoids the problems of severe air gap magnetic field distortion, large cogging torque and torque pulsation, large stray loss, high temperature rise and high noise caused by the cogging effect in the open slot of a high-voltage motor.

[0006] To achieve the above objectives, this utility model provides a motor stator, comprising:

[0007] A stator tooth module, comprising a plurality of stator tooth modules connected sequentially along the circumference of the motor stator, each stator tooth module comprising at least one stator tooth, and any two adjacent stator teeth being spaced apart along the circumference of the motor stator to form stator slots;

[0008] A stator yoke module, comprising a plurality of stator yoke modules sequentially connected along the circumference of the motor stator, wherein the plurality of stator yoke modules together surround the outer periphery of the stator gear module and close the openings of all the stator slots; and

[0009] Multiple winding coils, each of which is respectively housed in one of the stator slots;

[0010] The stator tooth module and the stator yoke module are spliced ​​together as one unit.

[0011] In one embodiment, the motor stator further includes a tooth pressure plate, the tooth pressure plate comprising:

[0012] Pressure plate, the pressure plate being fixed to the end face of the stator yoke module; and

[0013] Multiple toothed pressure bars are sequentially connected to the pressure plate along the circumference of the motor stator, and each toothed pressure bar is fixedly disposed with a stator tooth.

[0014] In one embodiment, the motor stator further includes a stator pressure ring, which is fixedly disposed on the end face of the pressure plate facing away from the stator yoke module.

[0015] In one embodiment, the stator pressure ring includes a plurality of pressure ring modules connected sequentially along the circumference of the motor stator.

[0016] In one embodiment, the toothed pressure plate includes a plurality of pressure plate modules, each pressure plate module including a ring plate and at least one toothed pressure strip disposed on the ring plate, the plurality of ring plates being sequentially connected along the circumference of the motor stator to form the pressure plate.

[0017] In one embodiment, each stator tooth is provided with a positioning part, and each stator yoke module is provided with at least one mating part. The plurality of positioning parts and the plurality of mating parts are installed in a one-to-one correspondence to connect the stator tooth module and the stator module into a whole.

[0018] In one embodiment, the positioning part is a dovetail groove opened on the outer peripheral surface of the stator tooth; the mating part is a dovetail tenon provided on the inner peripheral surface of the stator yoke module.

[0019] In one embodiment, the motor stator further includes a plurality of buffer blocks, each buffer block being correspondingly housed within a stator slot and located between the bottom wall of the stator slot and the winding coil; and / or

[0020] The motor stator also includes multiple tooth top pads and multiple slot wedges. Each tooth top pad and each slot wedge is correspondingly housed in the stator slot. The tooth top pad is located between the winding coil and the slot wedge, and the slot wedge is located between the tooth top pad and the stator yoke module.

[0021] This utility model also provides an electric motor, including the motor stator as described above.

[0022] In one embodiment, the outer diameter of the stator yoke module is 1.2m-1.8m.

[0023] In one embodiment, the rated voltage of the motor is 5kV-12kV.

[0024] The motor stator provided by this utility model adopts a modular structure of stator tooth modules and stator yoke modules, enabling multiple stator tooth modules and multiple stator yoke modules to be spliced ​​together to achieve a closed stator slot structure. Specifically, each stator tooth module contains multiple stator tooth modules, and each stator yoke module contains multiple stator yoke modules. The multiple stator tooth modules and multiple stator yoke modules are reliably connected together through precise mechanical connection methods (such as snap-fit, bolt connection, welding, or splicing). After installation, the multiple stator tooth modules and multiple stator yoke modules are spliced ​​together (such as mortise and tenon structure) to form a complete stator core. After the winding coil is wound and formed, it can be directly inserted into the stator slot on the stator tooth module, and then the stator yoke module is installed to seal the stator slot, thus solving the problem of difficult-to-find closed slots in existing technologies. This modular design not only simplifies the manufacturing process and reduces manufacturing costs, but also effectively solves the problems of difficult precision control and complex assembly in traditional motor stator manufacturing. Furthermore, the adoption of a closed-slot structure significantly reduces the harmonic content of the air gap magnetic field, effectively suppresses the cogging effect, thereby reducing cogging torque and torque pulsation, lowering noise and vibration during motor operation, and improving motor efficiency and reliability. In addition, the modular design facilitates the maintenance and replacement of the stator core, improving motor maintainability. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the structure of an embodiment of the motor provided by this utility model;

[0027] Figure 2 A schematic diagram of the structure of an embodiment of the motor stator provided by this utility model;

[0028] Figure 3 A schematic diagram of the structure of an embodiment of the stator gear module provided by this utility model;

[0029] Figure 4 A schematic diagram of a stator yoke module according to an embodiment of the present invention;

[0030] Figure 5 A schematic diagram of another embodiment of the motor stator provided by this utility model;

[0031] Figure 6 A schematic diagram of the structure of an embodiment of the pressure plate module provided by this utility model;

[0032] Figure 7 This is a structural schematic diagram of an embodiment of the pressure ring module provided by this utility model.

[0033] Explanation of icon numbers:

[0034] 100. Motor stator; 1. Stator tooth module; 11. Stator tooth module; 111. Stator tooth; 112. Stator slot; 113. Dovetail slot; 114. First bolt hole; 2. Stator yoke module; 21. Stator yoke module; 211. Dovetail tenon; 212. Second bolt hole; 3. Winding coil; 4. Tooth pressure plate; 41. Pressure plate module; 411. Ring plate; 412. Tooth pressure strip; 5. Stator pressure ring; 51. Pressure ring module; 6. Buffer block; 7. Tooth top pad; 8. Slot wedge block.

[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] 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 scope of protection of the present utility model.

[0037] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0038] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0039] This utility model proposes a motor stator 100.

[0040] Please see Figures 1 to 7 In one embodiment of this utility model, the motor stator 100 includes a stator tooth module 1, a stator yoke module 2, and a plurality of winding coils 3. The stator tooth module 1 includes a plurality of stator tooth modules 11 connected sequentially along the circumference of the motor stator 100. Each stator tooth module 11 includes at least one stator tooth 111. Any two adjacent stator teeth 111 are spaced apart along the circumference of the motor stator 100 to form stator slots 112. The stator yoke module 2 includes a plurality of stator yoke modules 21 connected sequentially along the circumference of the motor stator 100. The plurality of stator yoke modules 21 are arranged together around the outer periphery of the stator tooth module 1 and close the openings of all stator slots 112. Each winding coil 3 is correspondingly accommodated in a stator slot 112. The stator tooth module 1 and the stator yoke module 2 are spliced ​​into one unit.

[0041] The motor stator 100 provided by this utility model adopts a modular structure of stator tooth module 1 and stator yoke module 2, which enables multiple stator tooth modules 11 and multiple stator yoke modules 21 to be spliced ​​together to form a closed structure of stator slot 112. Specifically, each stator tooth module 1 includes multiple stator teeth 111, and each stator yoke module 2 includes multiple stator yoke modules. The multiple stator tooth modules and multiple stator yoke modules are reliably connected together by precise mechanical connection methods (such as snap-fit, bolt connection, welding or splicing). After installation, the multiple stator tooth modules and multiple stator yoke modules are spliced ​​together (such as mortise and tenon structure) to form a complete stator core. After the winding coil 3 is wound and formed, it can be directly inserted into the stator slot 112 on the stator tooth module 11, and then the stator yoke module 2 is installed to seal the stator slot 112, thereby solving the problem of the difficulty in removing the closed slot from the production line in the prior art. This modular design not only simplifies the manufacturing process and reduces manufacturing costs, but also effectively solves the problems of difficult precision control and complex assembly in the manufacturing of traditional motor stators. Furthermore, the adoption of a closed-slot structure significantly reduces the harmonic content of the air gap magnetic field, effectively suppressing the cogging effect, thereby reducing cogging torque and torque pulsation, lowering noise and vibration during motor operation, and improving motor efficiency and reliability. In addition, the modular design facilitates the maintenance and replacement of the stator core, improving motor maintainability.

[0042] It should be noted that the stator tooth module 11 in this utility model is designed as a fan-shaped structure or a single-tooth structure, and the stamping material of the stator tooth module 11 is usually silicon steel with a thickness of 0.5mm, 0.35mm, etc. Multiple stator tooth stampings are stacked axially to a specified design height, and after being stacked and formed, they form the stator tooth module 11, which is then fixedly connected by bolts and nuts (the first bolt holes 114 need to be pre-drilled on each stator tooth stamping). Each stator tooth module 11 usually includes an arc-shaped seat (which can be an arc-shaped silicon steel sheet or an arc-shaped silicon steel plate) and one or more stator teeth 111 provided on the arc-shaped seat. When multiple arc-shaped seats are spliced ​​together by a snap-fit ​​structure or a tenon and mortise structure, they can jointly form a continuous and complete stator tooth module 1.

[0043] The stator yoke module 21 is typically designed as a plate structure, and the lamination material of the stator yoke module 21 is usually silicon steel with a thickness of 0.5mm, 0.35mm, etc. Multiple stator yoke laminations are stacked axially to a specified design height, and after being stacked and formed, they are assembled into a stator yoke module 21, which is then fixedly connected by bolts and nuts (second bolt holes 212 need to be pre-drilled on each stator yoke lamination). If the number of multiple stator yoke modules 21 is N, then the circumferential angle occupied by a single stator yoke module 21 is 360° / N, that is, N stator yoke modules 21 can be spliced ​​into a complete circle.

[0044] It is understandable that "multiple stator yoke modules 21 are arranged around the outer periphery of the stator gear module 1 and close all the openings of the stator slots 112" means that multiple stator yoke modules 21 are installed around the stator gear module 1 to form an enclosing structure. This enclosing structure can cover the outer periphery of the stator gear module 1. Since the stator slots 112 are structures with an open outer circle on one side and a closed inner circle on the other side, the opening on the outer circle of the stator slots 112 can be covered, so that multiple stator yoke modules 21 and multiple stator gear modules 11 can jointly form multiple closed stator slots 112. It should be noted that the opening closure method of the stator slots 112 is flexible and diverse. It can be closed by a single stator yoke module or by two stator yoke modules jointly. This design does not impose specific restrictions on this.

[0045] In one embodiment, the motor stator 100 further includes a tooth pressure plate 4, which includes a pressure plate and a plurality of tooth pressure strips 412. The pressure plate is fixed to the end face of the stator yoke module 2. The plurality of tooth pressure strips 412 are sequentially connected to the pressure plate along the circumference of the motor stator 100, and each tooth pressure strip 412 is fixedly disposed with a stator tooth 111. Specifically, the stator yoke module has a second bolt hole 212 for connecting each stator yoke lamination. The pressure plate can be fixed to one end face of the stator yoke module 2 by bolts to provide support and fixation. Multiple toothed pressure strips 412 are sequentially connected to the pressure plate along the circumference of the motor stator 100, forming a ring-shaped pressure strip array. Each toothed pressure strip 412 is fixedly connected to the corresponding stator tooth 111 through the first bolt hole 114 for connecting the stator tooth laminations and bolts, so that the stator tooth module 1 and the stator yoke module 2 are tightly fixed, thereby ensuring that the stator tooth 111 remains stable during motor operation and preventing the position of the stator tooth 111 from changing due to vibration or other reasons, thus improving the overall mechanical strength and electromagnetic performance of the stator. It should be noted that the motor stator 100 usually includes two toothed pressure plates 4, which are correspondingly located at both ends of the motor stator 100.

[0046] To further improve the connection stability of the stator gear module 1 and the stator yoke module 2, in one embodiment, the motor stator 100 further includes a stator retaining ring 5. The stator retaining ring 5 is fixedly disposed on the end face of the pressure plate facing away from the stator yoke module 2, and is also fixed using the second bolt holes 212 for connecting each stator yoke lamination and bolts. The stator retaining ring 5 provides an additional fixing point for the gear pressure plate 4, which helps to prevent the gear pressure plate 4 from shifting during motor operation, thereby maintaining the stability of the stator gear module 1 and the stator yoke module 2. Furthermore, during the operation of the high-voltage motor, due to the action of electromagnetic and mechanical forces, the stator components may undergo slight deformation. The stator retaining ring 5 helps to prevent such deformation and maintain the precise shape of the stator. It should be noted that the motor stator 100 typically includes two retaining rings, which are correspondingly disposed at both ends of the motor stator 100.

[0047] In one embodiment, the stator retaining ring 5 includes a plurality of retaining ring modules 51 connected sequentially along the circumference of the motor stator 100. The stator retaining ring 5 is composed of a plurality of independent retaining ring modules 51, each of which is pre-manufactured and can be installed onto the motor stator 100 one by one during the assembly process. These retaining ring modules 51 are arranged along the circumference of the motor stator 100 and are interconnected to form a complete annular structure that surrounds and fixes the stator gear module 1 and the stator yoke module 2. The modular design makes it easier to install and replace the retaining ring modules 51, especially during motor repair or upgrades, where damaged modules can be replaced individually without replacing the entire stator retaining ring 5. Furthermore, since the retaining ring modules 51 can be mass-produced, this helps to improve production efficiency and reduce manufacturing costs.

[0048] Furthermore, in one embodiment, the toothed pressure plate 4 includes multiple pressure plate modules 41, each pressure plate module 41 including a ring plate 411 and at least one toothed pressure strip 412 disposed on the ring plate 411. The multiple ring plates 411 are sequentially connected along the circumference of the motor stator 100 to form a pressure plate. The modular design allows the toothed pressure plate 4 to be assembled in sections, simplifying the production process and reducing assembly difficulty. If a certain pressure plate module 41 is damaged, the module can be replaced individually without disassembling the entire pressure plate. Moreover, motors of different sizes can be accommodated by increasing or decreasing the number of pressure plate modules 41, improving design flexibility.

[0049] In one embodiment, each stator tooth 111 is provided with a positioning part, and each stator yoke module 21 is provided with at least one mating part. Multiple positioning parts and multiple mating parts are installed in a one-to-one correspondence to connect the stator tooth module 1 and the stator module as a whole. Through the corresponding design of the positioning parts and mating parts, the precise position of each stator tooth 111 in the stator yoke module 2 can be ensured, improving assembly accuracy. The connection mechanism of the positioning parts and mating parts helps to improve the stability of the entire stator structure, reduce vibration, and improve the operating efficiency of the motor. The mating parts and positioning parts can be male-female snap-fit ​​structures or snap-fit ​​structures.

[0050] In one embodiment, the positioning part is a dovetail groove 113 formed on the outer peripheral surface of the stator tooth 111; the mating part is a dovetail tenon 211 provided on the inner peripheral surface of the stator yoke module 21. The beveled design of the dovetail groove 113 and the dovetail tenon 211 creates a self-locking effect during insertion, maintaining connection stability even under vibration or impact conditions. Furthermore, the precise shape of the dovetail groove 113 and the dovetail tenon 211 ensures accurate alignment between the stator tooth 111 and the stator yoke module 21, which is crucial for motor performance.

[0051] In other embodiments, the stator teeth 111 and the stator yoke module 21 can also be fixedly connected by a male-female snap-fit ​​structure.

[0052] During motor operation, the winding coil 3 may be displaced due to electromagnetic force. In one embodiment, the motor stator 100 further includes multiple buffer blocks 6, each buffer block 6 being correspondingly housed within a stator slot 112 and located between the bottom wall of the stator slot 112 and the winding coil 3. The buffer blocks 6 are typically made of elastic insulating material, which can absorb and disperse vibrations generated during motor operation and help fix the position of the winding coil 3 in the stator slot 112, preventing the coil from shifting during motor operation, thereby reducing noise and improving the smoothness of motor operation. They also prevent direct contact between the winding coil 3 and the bottom wall of the stator slot 112, avoiding wear and damage to the winding coil 3. Additionally, the buffer blocks 6 can also have auxiliary heat dissipation capabilities, conducting heat from the winding coil 3 to the outside.

[0053] In other embodiments, the motor stator 100 further includes a plurality of tooth top pads 7 and a plurality of slot wedges 8, each tooth top pad 7 and each slot wedge 8 being respectively accommodated within a stator slot 112. The tooth top pads 7 are disposed between the winding coil 3 and the slot wedges 8, and the slot wedges 8 are disposed between the tooth top pads 7 and the stator yoke module 21. The tooth top pads 7 are typically made of a flexible insulating material, which can provide additional support to help fix the position of the winding coil 3 in the stator slot 112. They not only absorb the vibration generated by the coil during motor operation, reducing noise and improving the smoothness of operation, but also help to evenly distribute the pressure on the winding coil 3, preventing the winding coil 3 from directly contacting the bottom wall of the stator slot 112, thus avoiding wear and damage to the winding coil 3.

[0054] Of course, in one embodiment, the motor stator 100 may simultaneously include a buffer block 6, a tooth top pad 7, and a slot wedge block 8, thereby enabling the coil winding to be pressed tightly within the stator slot 112, improving the overall mechanical strength and heat dissipation capacity of the high-voltage coil.

[0055] This utility model also provides an electric motor, which includes a motor stator 100 as described above. The specific structure of the motor stator 100 is as described in the above embodiments. Since this motor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here. For large-size high-voltage motors, the manufacturing of traditional stators usually requires large and expensive molds. By adopting a modular design, the entire stator can be divided into multiple smaller modules. In this way, the mold size required for each module is much smaller, thereby reducing the mold manufacturing cost. Moreover, the modules are smaller and can be manufactured on different production lines, or even in different factories, and then assembled. This can better utilize production resources.

[0056] In one embodiment, the outer diameter of the stator yoke module 2 is 1.2m-1.8m. This size range of 1.2m to 1.8m provides strong adaptability, meeting the needs of large-size motors in various industrial applications, such as large pumps, compressors, and wind turbine generators. For large-size motors, given their large stator outer diameter, existing mold sizes cannot meet production requirements. Therefore, a modular design is adopted, decomposing the stator into multiple independent modules such as stator yoke modules and stator gear modules for assembly. This design not only reduces mold size and production difficulty but also significantly reduces production costs.

[0057] In one embodiment, the rated voltage of the motor is 5kV-12kV. The voltage range of 5kV to 12kV allows the motor to be widely used in various industrial fields, such as petrochemicals, metallurgy, power transmission and distribution, and mining, which typically require high-voltage motors to drive large mechanical equipment.

[0058] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A motor stator, characterized in that, include: A stator tooth module, comprising a plurality of stator tooth modules connected sequentially along the circumference of the motor stator, each stator tooth module comprising at least one stator tooth, and any two adjacent stator teeth being spaced apart along the circumference of the motor stator to form stator slots; A stator yoke module, comprising a plurality of stator yoke modules connected sequentially along the circumference of the motor stator, wherein the plurality of stator yoke modules are arranged together around the outer periphery of the stator gear module and close the openings of all the stator slots; as well as Multiple winding coils, each of which is respectively housed in one of the stator slots; The stator tooth module and the stator yoke module are spliced ​​together as one unit.

2. The motor stator as described in claim 1, characterized in that, The motor stator further includes a tooth pressure plate, the tooth pressure plate comprising: Pressure plate, the pressure plate being fixed to the end face of the stator yoke module; and Multiple toothed pressure bars are sequentially connected to the pressure plate along the circumference of the motor stator, and each toothed pressure bar is fixedly disposed with a stator tooth.

3. The motor stator as described in claim 2, characterized in that, The motor stator also includes a stator pressure ring, which is fixedly disposed on the end face of the pressure plate facing away from the stator yoke module.

4. The motor stator as described in claim 3, characterized in that, The stator pressure ring includes multiple pressure ring modules connected sequentially along the circumference of the motor stator.

5. The motor stator as described in any one of claims 2 to 4, characterized in that, The toothed pressure plate includes multiple pressure plate modules, each pressure plate module including a ring plate and at least one toothed pressure strip disposed on the ring plate, and the multiple ring plates are connected sequentially along the circumference of the motor stator to form the pressure plate.

6. The motor stator as described in claim 1, characterized in that, Each stator tooth is provided with a positioning part, and each stator yoke module is provided with at least one mating part. Multiple positioning parts and multiple mating parts are installed in a one-to-one correspondence to connect the stator tooth module and the stator yoke module into a whole.

7. The motor stator as described in claim 6, characterized in that, The positioning part is a dovetail groove opened on the outer peripheral surface of the stator tooth; the mating part is a dovetail tenon provided on the inner peripheral surface of the stator yoke module.

8. The motor stator as described in claim 1, characterized in that, The motor stator further includes multiple buffer blocks, each buffer block being accommodated within a stator slot and located between the bottom wall of the stator slot and the winding coil; and / or The motor stator also includes multiple tooth top pads and multiple slot wedges. Each tooth top pad and each slot wedge is correspondingly housed in the stator slot. The tooth top pad is located between the winding coil and the slot wedge, and the slot wedge is located between the tooth top pad and the stator yoke module.

9. An electric motor, characterized in that, Includes the motor stator as described in any one of claims 1 to 8.

10. The motor as described in claim 9, characterized in that, The outer diameter of the stator yoke module is 1.2m-1.8m.

11. The motor as described in claim 9, characterized in that, The rated voltage of the motor is 5kV-12kV.

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