Stator structure, motor and air compressor

Abstract

The application provides a kind of stator structure, motor, air compressor, belongs to energy-saving starting motor, energy-saving motor, wherein the stator structure includes: stator core, the inner peripheral wall of the stator core has a plurality of stator teeth, a plurality of the stator teeth are arranged along the circumferential direction of the stator core, the stator slot is formed between adjacent two stator teeth, a sliding block is arranged between adjacent two stator teeth, the sliding block can move along the radial direction of the stator core, and a conductor is arranged between the sliding block and the bottom of the stator slot.According to the application, the technical problem of large size of the winding along the slot opening direction in the prior art, which leads to the winding ac loss, can be solved.

Description

Technical Field

[0001] This invention belongs to the field of air compressor technology, specifically relating to a stator structure, a motor, and an air compressor, and is an energy-saving starter motor and an energy-saving electric motor. Background Technology

[0002] The AC losses in the stator windings of high-speed permanent magnet motors are caused by the skin effect and proximity effect of the conductor. The skin effect is the phenomenon that the current generated by the conductor tends to converge towards the outer surface due to the influence of its own alternating magnetic field. The proximity effect is the phenomenon that the current distribution is uneven due to the influence of the alternating magnetic field generated by adjacent conductors. Both the skin effect and the proximity effect reduce the current-carrying area of ​​the conductor and increase the equivalent resistance, ultimately leading to an increase in the copper losses of the motor. The skin effect and the proximity effect are related to the cross-sectional area of ​​the conductor, the current frequency, and the position of the winding in the stator slot. The closer the winding is to the slot opening, the more severe the AC loss; the closer the winding is to the slot bottom, the less the AC loss. With a constant conductor area, the smaller the conductor dimension along the slot opening direction, the smaller the AC loss, and vice versa.

[0003] Severe AC losses and poor heat dissipation can lead to excessively high stator winding temperatures, accelerating winding insulation aging, shortening motor lifespan, and in severe cases, directly causing inter-turn or phase-to-phase short circuits in the windings.

[0004] Because the winding dimensions along the slot opening direction in the existing technology are relatively large, resulting in technical problems such as AC losses in the winding, this invention studies and designs a stator structure, motor, and air compressor, which belong to the category of energy-saving starter motors and energy-saving electric motors. Summary of the Invention

[0005] Therefore, the present invention provides a stator structure, a motor, and an air compressor, which belong to the category of energy-saving starter motors and energy-saving electric motors, and can solve the technical problem in the prior art where the winding has a large size along the slot opening direction, resulting in AC losses in the winding.

[0006] To address the aforementioned problems, the present invention provides a stator structure comprising: a stator core, wherein the inner peripheral wall of the stator core has a plurality of stator teeth, the plurality of stator teeth being arranged at intervals along the circumference of the stator core, a stator slot being formed between two adjacent stator teeth, a slider being disposed between two adjacent stator teeth, the slider being capable of moving radially along the stator core, and a conductor being disposed between the slider and the bottom of the stator slot.

[0007] In some embodiments, the stator core includes a first stator lamination, the inner peripheral wall of the first stator lamination having a plurality of second teeth, and a groove provided on one side of adjacent second teeth facing each other, the groove extending along the depth direction of the stator slot, and the end of the slider being located within the stator slot.

[0008] In some embodiments, the stator core further includes a second stator lamination, the inner peripheral wall of which has a plurality of first teeth, and the second stator lamination and the first stator lamination are alternately stacked to form the stator core.

[0009] In some embodiments, the second stator lamination is located at both ends of the stator core along its axial direction.

[0010] In some embodiments, a groove is provided at one end of the slider along the circumference of the stator core, and a movable member is provided in the groove, which can extend out of the opening of the groove or retract into the groove.

[0011] The present invention also provides an electric motor, including a stator, wherein the stator adopts the stator structure described above.

[0012] In some embodiments, the motor further includes a rotating shaft, which is sleeved inside the stator. The rotating shaft is provided with an air duct for conveying airflow outside the rotating shaft. The rotating shaft is provided with a plurality of air outlets, which are connected to the air duct. The air outlets are arranged in a one-to-one correspondence with the slider.

[0013] In some embodiments, the rotating shaft includes two short shafts and a magnet. Along the axial direction of the rotating shaft, the magnet is located between the two short shafts. A sheath is fitted onto the magnet. The short shafts are at least partially fitted inside the sheath. The air duct is located inside the sheath and extends along the axial direction of the sheath. The air outlet is provided on the outer wall of the sheath. At least one of the short shafts is provided with an air inlet. The air inlet penetrates the end of the short shaft facing away from the magnet. The inner wall of the sheath is provided with an air inlet. The air inlet communicates with the air duct. The short shaft is provided with an air passage. One end of the air passage communicates with the air inlet, and the other end of the air passage communicates with the air inlet.

[0014] The present invention also provides an air compressor, including the motor described above.

[0015] In some embodiments, an impeller is provided on any of the short shafts, and the air inlet is capable of delivering airflow from the air compressor intake port to the air duct.

[0016] The stator structure, motor, and air compressor provided by this invention have the following beneficial effects:

[0017] The slider, when moving, can press the conductor between the slider and the bottom of the stator slot, thereby adjusting the position of the conductor relative to the stator slot and moving the conductor away from the slot opening area. This reduces the overheating of the winding caused by AC loss, accelerates the aging of the winding insulation, shortens the service life of the motor, and in severe cases may directly cause problems such as short circuits between winding turns or between phases. Attached Figure Description

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the stator structure of the present invention;

[0020] Figure 2 This is a partial cross-sectional view of the stator structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the second stator lamination in the stator structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the first stator lamination in the stator structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the slider structure in the stator structure of the present invention. Figure 1 ;

[0024] Figure 6 This is a schematic diagram of the slider structure in the stator structure of the present invention. Figure 2 ;

[0025] Figure 7 This is an exploded view of the stator structure of the present invention;

[0026] Figure 8 This is a schematic diagram of the assembly of the winding and the slider in the stator structure of the present invention;

[0027] Figure 9 This is an assembly diagram of the slider extrusion winding in the stator structure of the present invention;

[0028] Figure 10 This is a schematic diagram of the structure of an air compressor according to another embodiment of the present invention;

[0029] Figure 11 This is a schematic diagram of the short shaft in an air compressor according to another embodiment of the present invention;

[0030] Figure 12This is a schematic diagram of the structure of the sheath in an air compressor according to another embodiment of the present invention;

[0031] Figure 13 This is a cross-sectional view of the sheath in an air compressor according to another embodiment of the present invention.

[0032] The attached figures are labeled as follows:

[0033] 1. Short shaft; 2. Impeller; 3. Air inlet; 4. Air vent; 5. Sheath; 6. Air duct; 7. Air outlet; 8. First stator lamination; 9. Second stator lamination; 10. Conductor; 11. Slider; 12. Stator; 13. Collector; 14. Volute; 15. Air inlet; 16. First tooth; 17. Second tooth; 18. Moving part; 19. Stator slot; 20. Slot opening; 21. Slot bottom. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0036] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0037] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0038] See also Figure 1-13 As shown, according to an embodiment of the present invention, a stator structure is provided, comprising: a stator core, wherein the inner peripheral wall of the stator core has a plurality of stator teeth, the plurality of stator teeth are arranged at intervals along the circumference of the stator core, a stator slot 19 is formed between two adjacent stator teeth, a slider 11 is disposed between two adjacent stator teeth, the slider 11 is capable of moving radially along the stator core, and a conductor 10 is disposed between the slider 11 and the bottom 21 of the stator slot 19. In this technical solution, by means of the slider 11, when the slider 11 moves, it can squeeze the conductor 10 disposed between the slider 11 and the bottom 21 of the stator slot 19, thereby adjusting the position of the conductor 10 relative to the stator slot 19, so that the conductor 10 is away from the slot opening 20 area, thereby reducing the excessive winding temperature caused by AC loss, accelerating the insulation aging of the winding, shortening the service life of the motor, and in severe cases, directly causing problems such as inter-turn or phase-to-phase short circuits in the winding, thereby providing an energy-saving starter motor and an energy-saving motor.

[0039] In some implementations, conductor 10 is a winding.

[0040] In some embodiments, the slider 11 is capable of radial movement along the stator core, meaning that between two adjacent stator teeth, the slider 11 moves between the slot opening 20 and the slot bottom 21 of the stator slot 19. When the slider 11 moves, the slider 11, the sidewall of the stator tooth, and the slot bottom 21 of the stator slot 19 enclose an installation space, and the conductor 10 is installed between the slider 11 and the slot bottom 21 of the stator slot 19.

[0041] In some embodiments, the slider 11 is made of an insulating material.

[0042] In some embodiments, the stator core includes a first stator lamination 8, the inner peripheral wall of the first stator lamination 8 having a plurality of second teeth 17, and a groove provided on the side of adjacent second teeth 17 facing each other, the groove extending along the depth direction of the stator slot 19, and the end of the slider 11 located in the stator slot 19.

[0043] In this technical solution, by providing a sliding groove on the side of adjacent second teeth 17 facing each other, the end of the slider 11 is located in the stator slot 19, which guides the slider 11 so that the slider 11 can adjust the installation space of the winding, thereby reducing the size between the winding and the slot.

[0044] In some embodiments, a groove is provided on the side of adjacent second teeth 17 facing each other, that is, a groove is provided on the side of the second teeth 17 along the circumference of the stator core.

[0045] In some embodiments, the inner peripheral wall of the first stator lamination 8 has a plurality of second teeth 17, which are arranged at intervals along the circumference of the stator core, and the second teeth 17 form stator teeth of the stator core.

[0046] In some embodiments, a slot 20 of a stator slot 19 is formed between the ends of two adjacent stator teeth.

[0047] In some embodiments, the groove extends through the second tooth 17 along the axial direction of the stator core, see also [reference needed]. Figure 4 As shown, the second tooth 17 forms a narrow section, and the end of the slider 11 is located in the stator slot 19. This means that between two adjacent second teeth 17, one end of the slider 11 is located in the groove of one second tooth 17, and the other end of the slider 11 is located in the groove of another second tooth 17.

[0048] In some embodiments, the stator core further includes a second stator lamination 9, the inner peripheral wall of which has a plurality of first teeth 16, and the second stator lamination 9 and the first stator lamination 8 are alternately stacked to form the stator core.

[0049] In this technical solution, the stator core is formed by alternately stacking the second stator lamination 9 and the first stator lamination 8. The second stator lamination 9 can limit the axial movement of the slider 11 to prevent the slider 11 from shifting axially.

[0050] In some embodiments, when the groove passes through the second tooth 17 along the axial direction of the stator core, the width of the first tooth 16 along the circumferential direction of the stator core is equal to the sum of the width of the second tooth 17 and the groove depth of the two grooves, thereby making the groove of the second tooth 17 form a slide.

[0051] In some embodiments, when the groove passes through the second tooth 17 along the axial direction of the stator core, the tooth width of the second stator lamination 9 is different from that of the first stator lamination 8, while the other dimensions and structures are the same.

[0052] In some embodiments, the second stator lamination 9 and the first stator lamination 8 have the same dimensions and structure, the difference being that the teeth of the first stator lamination 8 are provided with grooves and sliders 11.

[0053] In some embodiments, the second stator lamination 9 is located at both ends of the stator core along its axial direction.

[0054] In this technical solution, when the second stator lamination 9 is stacked with the first stator lamination 8, the second stator lamination 9 is located at both ends of the stator core in the axial direction, so the slider 11 will not move axially due to the presence of the second stator lamination 9.

[0055] The AC losses in the stator windings of high-speed permanent magnet motors are caused by the skin effect and proximity effect of the conductors. The skin effect and proximity effect of the conductors within the slots are related to their position in the stator slots; the closer the winding is to the slot opening, the more severe the AC loss, and the closer it is to the slot bottom, the less the AC loss. With a constant conductor area, the smaller the conductor's dimension along the slot opening direction, the smaller the AC loss, and vice versa. The stator structure of this invention can adjust the position of the conductors relative to the stator slots, moving the conductors away from the slot opening area, thereby reducing the excessively high winding temperature caused by AC losses, accelerating winding insulation aging, shortening the motor's service life, and in severe cases, directly causing problems such as inter-turn or phase-to-phase short circuits.

[0056] In some embodiments, a groove is provided at one end of the slider 11 along the circumference of the stator core, and a movable member 18 is provided in the groove, which can extend out of the opening of the groove or retract into the groove.

[0057] In this technical solution, since the two adjacent second teeth 17 are not parallel and are at an angle, a groove is provided at one end of the slider 11, and a movable part 18 is provided in the groove. The movable part 18 can extend out of the opening of the groove or retract into the groove, so that when the slider 11 moves, the end of the slider 11 is always located in the groove, so that the slider 11 can meet the structural requirements of the stator.

[0058] In some embodiments, a spring is provided between the movable member 18 and the bottom of the groove, so that the movable member 18 can extend out of the opening of the groove or retract into the groove. Of course, other structures in which the movable member 18 can extend or retract are also possible.

[0059] In some implementations, see reference Figure 5 As shown, the slider 11 is I-shaped and has a first part, a second part, and a third part. The first part and the third part are connected by the second part. The first part and the third part are arc-shaped, and their arcs are concentric with the inner circle of the stator teeth, thus forming an installation space between the slider 11 and the bottom 21 of the stator slot 19. Along the circumference of the stator core, the ends of the first part and the third part are provided with a groove and a movable part 18.

[0060] In some embodiments, the first part is closer to the bottom 21 of the stator slot 19 than the third part. Since the two adjacent second teeth 17 are at an angle, the length of the first part is less than the length of the second part along the circumference of the stator core, thereby satisfying the installation between the two adjacent second teeth 17.

[0061] In some implementations, the height of the groove along the axial direction of the stator core is the thickness of the first stator lamination 8.

[0062] In the stator structure of the present invention, before winding the winding, the slider 11 can be pushed to a middle-high position in the slot away from the bottom of the slot, and at the same time the telescopic structure can be retracted into the slider, thereby forming a gap between the slider 11 and the teeth of the first stator lamination 8 for unwinding.

[0063] The stator 12 is formed by stacking two stator laminations 8 and 9 with different tooth widths. The second tooth 17 of the first stator lamination 8 is narrower than the first tooth 16 of the second stator lamination 9. The stacking sequence of the stator 12 is: second stator lamination 9 → first stator lamination 8 → second stator lamination 9 → first stator lamination 8 → second stator lamination 9. The total height of the stacked stator 12 is determined by the motor performance requirements. However, it should be noted that after stacking, the stator blocks formed by the second stator lamination 9 should be located at both ends of the stator 12. Because the second tooth 17 of the first stator lamination 8 is narrower than the first tooth 16 of the second stator lamination 9, a sliding track will be formed in the teeth of the stator 12 after stacking due to the narrow tooth of the first stator lamination 8. The height of the sliding track is consistent with the stacking height of the first stator lamination 8. After the first stator laminations 8 are stacked to a certain height to form a slide rail and stator core blocks, an I-shaped insulating slider 11 is embedded in the slide rail. The insulating slider 11 has movable parts 18 at both ends of its upper and lower arc surfaces. During the stacking of the first stator laminations 8 and the second stator laminations 9, after the second stator lamination 9 is stacked, the I-shaped insulating slider 11 is embedded in the toothed slide rail. After embedding, the I-shaped insulating slider 11 can slide up and down within the slide rail, thus changing the area of ​​the stator slots 19 according to the up-and-down movement of the I-shaped insulating slider 11. The number of I-shaped insulating sliders 11 embedded circumferentially matches the number of slots, and the number embedded axially matches the number of blocks formed by stacking the first stator laminations 8.

[0064] It should be noted that since the two adjacent teeth are not parallel but at an angle, if there is no moving part 18, when the air volume reaches the maximum, the distance between the two teeth of the first stator lamination 8 will become larger and larger, and the slider 11 will fall off axially.

[0065] It should be noted that, since the teeth of the first stator lamination 8 are smaller than those of the second stator lamination 9, the first stator lamination 8 will form a slide after stacking. An I-shaped insulating slider 11 is embedded in the slide. The slider 11 will not move axially due to the presence of the second stator lamination 9.

[0066] The stator structure of the present invention allows the position of the conductor 10 relative to the stator slot to be adjusted by the slider 11, thereby moving the conductor 10 away from the slot opening 20 area and reducing the excessive winding temperature caused by AC loss, which accelerates the insulation aging of the winding, shortens the service life of the motor, and may directly cause problems such as short circuits between winding turns or between phases in severe cases.

[0067] The present invention also provides an electric motor, including a stator 12, wherein the stator 12 adopts the stator structure described above.

[0068] In some embodiments, the motor further includes a rotating shaft, which is sleeved inside the stator 12. The rotating shaft is provided with an air duct 6 for conveying airflow outside the rotating shaft. The rotating shaft is provided with a plurality of air outlets 7, which are connected to the air duct 6. The air outlets 7 are arranged in a one-to-one correspondence with the slider 11.

[0069] In this technical solution, the airflow outside the rotating shaft is delivered to the slider 11 through the air outlet 7 via the air duct 6, so that the slider 11 moves in the stator slot 19 under the action of the airflow, thereby adjusting the distance between the conductor 10 and the slot opening 20.

[0070] In some embodiments, the rotating shaft includes two short shafts 1 and a magnet. Along the axial direction of the rotating shaft, the magnet is located between the two short shafts 1. A sheath 5 is fitted on the magnet. The short shafts 1 are at least partially fitted inside the sheath 5. The air duct 6 is located inside the sheath 5 and extends along the axial direction of the sheath 5. The air outlet 7 is provided on the outer wall of the sheath 5. At least one of the short shafts 1 is provided with an air inlet 3. The air inlet 3 passes through the end of the short shaft 1 facing away from the magnet. An air inlet 15 is provided on the inner wall of the sheath 5. The air inlet 15 is connected to the air duct 6. An air passage 4 is provided on the short shaft 1. One end of the air passage 4 is connected to the air inlet 15, and the other end of the air passage 4 is connected to the air inlet 3.

[0071] In this technical solution, the airflow outside the rotating shaft is delivered to the slider 11 through the air inlet 3, the air passage 4, the air inlet 15, the air duct 6, and the air outlet 7, so that the slider 11 moves in the stator slot 19.

[0072] In some embodiments, the rotating shaft includes two short shafts 1 and a magnet. Along the axial direction of the rotating shaft, the magnet is located between the two short shafts 1. A sheath 5 is fitted on the magnet. The short shafts 1 are at least partially fitted inside the sheath 5. The structure of the short shafts 1, the magnet and the sheath 5 can adopt an existing rotating shaft structure.

[0073] In some embodiments, the air inlet 3 is a blind hole, the air outlet 4 extends radially along the short axis 1, the air inlet 15 is opened on the inner peripheral wall of the sheath 5, and the air outlet 7 is opened on the outer peripheral wall of the sheath 5.

[0074] In the motor of this invention, the axial opening positions of the air outlet holes 7 on the outer wall of the sheath 5 correspond one-to-one with the axial positions of the I-shaped insulating slider 11. The circumferential opening positions and number of the air outlet holes 7 on the outer wall must be consistent with the number of stator slots. During high-speed rotation, high-pressure gas is drawn into the shaft air inlet 3, and then blown out through the radial air passage 4, the axial air duct 6, and the air outlet holes 7 on the outer wall. The blown high-pressure gas blows directly onto the I-shaped insulating slider 11. Under the action of the high-pressure gas, the slider 11 moves towards the bottom 21 of the stator slot, squeezing the conductor 10 in the slot, so that the conductor 10 in the slot moves away from the stator slot opening 20.

[0075] This invention relates to a motor that, in conjunction with a blown-out shaft and sheath, allows the slider within the stator to undergo radial displacement under the action of high-pressure gas, compressing the conductors within the slots and moving them away from the slot openings. This reduces the skin effect and proximity effect of the conductors, thereby reducing AC losses in the high-speed motor. Consequently, it reduces the risk of overheating of the windings caused by AC losses, which accelerates winding insulation aging, shortens the motor's lifespan, and in severe cases, may directly cause problems such as inter-turn or phase-to-phase short circuits. The motor has a simple structure, is easy to manufacture and assemble, and requires no special or high-precision precision.

[0076] The present invention also provides an air compressor, including the motor described above.

[0077] In some embodiments, an impeller 2 is provided on any of the short shafts 1, and the air inlet 3 is capable of conveying the airflow at the air compressor intake port to the air duct 6.

[0078] In this technical solution, when the air compressor is rotating at high speed, under the action of the impeller 2, air flows into the high-speed motor axially along the collector 13. While some air is compressed by the volute 14, some high-pressure air flows into the air inlet 3 of the short shaft 1. Through the radial air passage 4 opened on the short shaft 1, the high-speed motor shaft sleeve 5 has an air inlet 15 at the corresponding position of the radial air passage 4 opened on the short shaft 1. The high-pressure air can flow into the axial air duct 6 inside the sleeve through the air inlet 15 of the sleeve, and then be blown out through several air outlets 7 on the outer wall of the sleeve 5.

[0079] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A stator structure, characterized in that: include: The stator core has multiple stator teeth on its inner peripheral wall. The multiple stator teeth are arranged at intervals along the circumference of the stator core. A stator slot (19) is formed between two adjacent stator teeth. A slider (11) is provided between two adjacent stator teeth. The slider (11) can move radially along the stator core. A conductor (10) is provided between the slider (11) and the bottom (21) of the stator slot (19). The stator core includes a first stator lamination (8). The inner peripheral wall of the first stator lamination (8) has multiple second teeth (17). A sliding groove is provided on the side of adjacent second teeth (17) facing each other. The sliding groove extends along the depth direction of the stator slot (19). The end of the slider (11) is located in the stator slot (19). The sliding groove can guide the slider (11) so that the slider (11) can adjust the size of the installation space of the conductor (10).

2. The stator structure according to claim 1, characterized in that: The stator core also includes a second stator lamination (9), the inner peripheral wall of which has a plurality of first teeth (16), and the second stator lamination (9) and the first stator lamination (8) are alternately stacked to form the stator core.

3. The stator structure according to claim 2, characterized in that: Along the axial direction of the stator core, both ends of the stator core are the second stator laminations (9).

4. The stator structure according to claim 1, characterized in that: Along the circumference of the stator core, a groove is provided at one end of the slider (11), and a movable part (18) is provided in the groove. The movable part (18) can extend out of the opening of the groove or retract into the groove.

5. An electric motor, characterized in that, Includes a stator (12), said stator (12) employing the stator structure of any one of claims 1 to 4.

6. The motor according to claim 5, characterized in that: The motor also includes a rotating shaft, which is sleeved inside the stator (12). The rotating shaft is provided with an air duct (6) for conveying airflow outside the rotating shaft. The rotating shaft is provided with multiple air outlets (7), which are connected to the air duct (6). The air outlets (7) are arranged in a one-to-one correspondence with the slider (11).

7. The motor according to claim 6, characterized in that: The rotating shaft includes two short shafts (1) and a magnet. Along the axial direction of the rotating shaft, the magnet is located between the two short shafts (1). A sleeve (5) is fitted on the magnet. The short shafts (1) are at least partially fitted inside the sleeve (5). The air duct (6) is located inside the sleeve (5) and extends along the axial direction of the sleeve (5). The air outlet (7) is provided on the outer wall of the sleeve (5). At least one of the short shafts (1) is provided with an air inlet (3). The air inlet (3) passes through the end of the short shaft (1) facing away from the magnet. The inner wall of the sleeve (5) is provided with an air inlet (15). The air inlet (15) is connected to the air duct (6). The short shaft (1) is provided with an air passage (4). One end of the air passage (4) is connected to the air inlet (15), and the other end of the air passage (4) is connected to the air inlet (3).

8. An air compressor, characterized in that, The motor included in any one of claims 5 to 7.

9. The air compressor according to claim 5, characterized in that, An impeller (2) is provided on any of the short shafts (1), and the air inlet (3) can transport the airflow at the air compressor intake port to the air duct (6).

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