Stator structure, motor structure, compressor structure, and refrigeration device

Abstract

The embodiments of the present application provide a stator structure, a motor structure, a compressor structure, and a refrigeration device, in which the stator structure includes a stator core including a stator yoke and a plurality of stator teeth extending radially inward from the stator yoke, a first groove provided in a side wall of the stator yoke away from the axis of the stator core, and a second groove provided in the first groove and extending from a slot bottom of the first groove toward the axis of the stator core, in which the second groove includes a first slot and a second slot spaced apart in the circumferential direction of the stator core, and the projected area of ​​the first slot and the projected area of ​​the second slot are different on the end face of the stator core. The technical solution of the present application can significantly improve the noise of the motor, and in particular, can significantly reduce the noise of high-frequency carrier waves.

Description

[Technical Field]

[0001] This application claims priority to a Chinese patent application filed with the China Patent Office on October 14, 2021, bearing application number "202111198763.8" and entitled "Stator structure, motor structure, compressor structure, and refrigeration device," the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of motors, and more particularly to a stator structure, a motor structure, a compressor structure, and a refrigeration device. [Background technology]

[0003] Current motors often generate noise during operation due to improper design, especially high-frequency noise caused by input current modulation waves. Summary of the Invention [Problem to be solved by the invention]

[0004] The present application aims to solve at least one technical problem existing in the prior art or related art.

[0005] In view of the above, an embodiment of a first aspect of the present application provides a stator structure.

[0006] An embodiment of a second aspect of the present application provides a motor structure.

[0007] An embodiment of a third aspect of the present application provides a compressor structure.

[0008] An embodiment of a fourth aspect of the present application provides a refrigeration device. [Means for solving the problem]

[0009] In order to achieve the above object, an embodiment of the first aspect of the present application comprises: a stator core including a stator yoke and a plurality of stator teeth extending radially inward from the stator yoke; a first groove provided in a side wall of the stator yoke on one side away from the axis of the stator core; a second groove provided in the first groove and extending from a slot bottom of the first groove toward the axis of the stator core, The second groove includes a first slot and a second slot spaced apart circumferentially around the stator core, providing a stator structure in which the projected area of ​​the first slot and the projected area of ​​the second slot are different on the end face of the stator core.

[0010] A stator structure according to a first embodiment of the present invention includes a stator core and two types of grooves, specifically, first and second grooves, formed in the stator core. The stator core itself includes two conventional structures, a stator yoke and stator teeth, both of which are positioned such that the stator teeth are located radially inside the stator yoke, i.e., the stator yoke extends radially inward to form the stator teeth. The first groove serves as a slot-shaped base, recessed inward from the outer wall of the stator yoke, i.e., the side wall on one side farther from the axis of the stator core. The second groove is recessed further inward from the first groove, i.e., extending from the slot bottom of the first groove toward the axis of the stator core. This results in a two-layered groove configuration, which serves to suppress noise while ensuring motor efficiency.

[0011] Furthermore, the second groove mainly includes two types of slots, which have different shapes, specifically, different projected contours on the end face of the stator core, and the first and second slots are spaced apart and not connected to each other, so that different first and second slots are combined with the first groove to form different slot structures, thereby significantly reducing high-frequency carrier noise during operation through the cooperation of the first and second grooves. By configuring the first and second slots corresponding to the second groove to have different projected areas, motor noise can be significantly reduced, especially high-frequency carrier noise.

[0012] Here, the thickness of the stator yoke is the dimension of the stator yoke in the radial direction of the stator core.

[0013] Here, the depth of the first groove is the dimension extending radially inward from the outer edge of the stator core.

[0014] Furthermore, since the second groove extends inward from the first groove, the slot width of the second groove is generally equal to or less than the slot width of the first groove.

[0015] In the above technical solution, the projected area SA of the first groove is determined by the number Q of the stator teeth, the thickness y of the stator yoke, and the outer diameter D of the stator core,

number

[0016] In this technical solution, the projected area of ​​the first groove is limited, specifically, the projected area SA of the first groove, the number of stator teeth Q, the thickness y of the stator yoke, and the outer diameter D of the stator core are calculated according to the above formula, and the calculated ratio value is limited to the range of 0.157 to 0.785, thereby well meeting the need to reduce high-frequency carrier noise during operation and achieving the effect of noise reduction.

[0017] In the above technical solution, the projected area SB of the first slot is determined by the number Q of the stator teeth, the thickness y of the stator yoke, and the outer diameter D of the stator core,

number

[0018] In this technical solution, the projected area of ​​the first slot is limited, specifically, the projected area SB of the first slot, the number of stator teeth Q, the thickness y of the stator yoke, and the outer diameter D of the stator core are calculated according to the above formula, and the calculated ratio value is limited to the range of 0.052 to 0.3925, thereby well meeting the need to reduce high-frequency carrier noise during operation and achieving the effect of noise reduction.

[0019] In the above technical solution, the projected area SC of the second slot is determined by the number Q of the stator teeth, the thickness y of the stator yoke, and the outer diameter D of the stator core,

number

[0020] In this technical solution, the projected area of ​​the second slot is limited, specifically, the projected area S C The number of stator teeth Q, the thickness y of the stator yoke, and the outer diameter D of the stator core are calculated using the above formula, and the calculated ratio is limited to the range of 0.052 to 0.3925, thereby meeting the need to reduce high-frequency carrier noise during operation and achieving the effect of noise reduction.

[0021] In the above technical solution, the first slot is a rectangular slot, and the second slot is a circular arc slot.

[0022] In this technical solution, the first slot is limited to a rectangular slot and the second slot is limited to a circular arc slot, and a conventional structure is used, which makes processing and manufacturing easier.

[0023] In the above technical solutions, the number of the first slots is an odd number greater than or equal to 3, and / or the number of the second slots is an odd number greater than or equal to 3.

[0024] In this technical solution, the number of at least one of the first slots and the second slots is limited to three or more and an odd number, thereby ensuring normal motor efficiency during operation. The sum of the number of the first slots and the number of the second slots is equal to the number of the first grooves. The number of primary grooves is equal to the number of stator teeth. It is understood that.

[0025] In one particular embodiment, the first slots are rectangular slots and are three in number, and the second slots are arc-shaped slots and are Q-3 in number.

[0026] In the above technical solution, the first slots are provided evenly in the circumferential direction of the stator core, and / or the second slots are provided evenly in the circumferential direction of the stator core.

[0027] This technical solution is advantageous in that by limiting at least one of the first slots and the second slots to be evenly spaced in the stator core, a relatively uniform magnetic field is generated, which drives the rotor structure to rotate.

[0028] Of course, if both the first slots and the second slots are evenly provided in the stator core, the driving action on the rotor structure can be greatly improved, that is, the motor efficiency of the entire motor structure can be increased.

[0029] In the above technical solution, the stator core specifically includes a plurality of stator punching sheets stacked in the axial direction of the stator core.

[0030] In this technical solution, the stator core is formed by stacking multiple stator punching sheets in the axial direction, and each stator punching sheet is provided with a stator yoke, stator teeth, and winding slots. The stator teeth are provided on the stator yoke, and a winding slot is formed between two adjacent stator teeth, so that the stator winding can be wound in the winding slot, generating a magnetic field for the rotor and realizing the function of the stator.

[0031] Furthermore, the material of the stator punching sheet is a silicon steel sheet or other soft magnetic material sheet, and the thickness is 0.35 mm or less.

[0032] A motor structure according to an embodiment of the second aspect of the present application includes the stator structure of any of the above embodiments, and a rotor structure arranged coaxially with the stator structure, the rotor structure including a rotor core and a permanent magnet arranged in the rotor core.

[0033] The motor structure of the present application includes two parts: a stator structure and a rotor structure. When the stator core has stator windings wound on the stator teeth and arranged in the winding slots, a normal magnetic field is exerted on the rotor structure, realizing the rotation of the rotor structure. Specifically, the rotor structure is arranged coaxially with the stator structure and mainly includes two parts: a rotor core and a permanent magnet. When the stator structure is energized to generate a vector magnetic field, the magnetic components rotate due to the magnetic action, thereby realizing the movement of the rotor structure.

[0034] The axis of the stator core and the axis of the rotor core are on the same line, and the stator teeth and permanent magnets are both arranged around this axis, and are generally evenly spaced.

[0035] In the above technical solution, at the end face of the rotor core, the projection contour line of the permanent magnet is symmetrical with respect to the central axis line of two adjacent stator teeth, and the permanent magnet is divided into a straight line segment, fold line segments, The curved line segment may be one of:

[0036] In this technical solution, the cross-sectional shape of the permanent magnet is limited to a symmetrical shape to facilitate processing and installation. Specifically, the permanent magnet can be any combination of three shapes, and can be a pure straight line, but in this case, under the condition of symmetry, the projected outline of the permanent magnet must be perpendicular to the central axis. In another case, the permanent magnet can be a symmetrical straight line segment or can be understood as a folded line segment, in which case there are many possibilities for the projected outline, including but not limited to V-shape, W-shape, etc. In yet another case, the permanent magnet can be a pure curved line segment, which also needs to maintain a symmetrical shape, and can be a single arc line or a combination of multiple arc lines.

[0037] Of course, it may be a combination of curved and straight segments, as long as the structure is symmetrical.

[0038] In the above technical solution, the number of stator teeth Q, the number of permanent magnets Number of pole pairs p, and the number of phases m of the motor structure,

number

[0039] This technical solution limits the number of stator teeth to no more than twice the product of the number of rotor pole pairs and the number of motor phases, resulting in a fractional slot motor as a whole. The fractional slot motor effectively weakens the high-order harmonic potentials generated by the non-sinusoidal distribution of the magnetic pole field, and also weakens the amplitude of the harmonic potentials on the teeth, improving their waveform. Furthermore, the use of a fractional slot motor effectively reduces the pulse amplitude of the magnetic flux and reduces pulse loss on the pole faces.

[0040] An embodiment of a third aspect of the present application provides a compressor structure including a housing and a motor structure according to the second aspect provided within the housing.

[0041] A compressor structure according to an embodiment of the third aspect of the present application includes a housing and a motor structure provided within the housing, and the motor structure of the second aspect described above is provided within the compressor structure, thereby providing beneficial effects of the motor structure described above, and therefore will not be described in detail here.

[0042] A fourth aspect of the present invention provides a refrigeration device including a box and the compressor structure of the third aspect provided within the box.

[0043] A refrigeration device according to an embodiment of the fourth aspect of the present application includes a box body and a compressor structure provided within the box body, and the compressor structure of the third aspect described above is provided within the refrigeration device, and therefore has the beneficial effects of the compressor structure described above, so it will not be described in detail here.

[0044] Here, the refrigeration device includes, but is not limited to, a device with a refrigeration function, such as a refrigerator, a freezer, and an air conditioner.

[0045] Additional aspects and advantages of the present application will be set forth in part in the description that follows, or may be learned by practice of the present application. [Brief explanation of the drawings]

[0046] [Figure 1] 1 is a structural schematic diagram of a stator structure according to an embodiment of the present invention; [Figure 2] 1 shows a structural schematic diagram of a motor structure according to an embodiment of the present application; [Figure 3] 1 is a structural schematic diagram of a stator core according to an embodiment of the present invention; [Figure 4] 1 is a structural schematic diagram of a rotor core according to an embodiment of the present invention; [Figure 5] 1 shows a structural schematic diagram of a motor structure according to an embodiment of the present application; [Figure 6] 1 shows a structural schematic diagram of a compressor structure according to an embodiment of the present application; [Figure 7] 1 shows a structural schematic diagram of a refrigeration device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0047] In order to make the above-mentioned objects, features, and advantages of the embodiments of the present application more clearly understood, the embodiments of the present application will be described in more detail below with reference to the accompanying drawings and specific embodiments. Note that the embodiments of the present application and the features in the embodiments may be combined with each other without contradiction.

[0048] Although numerous specific details are set forth in the following description to facilitate a thorough understanding of the present application, the embodiments of the present application may be implemented in other ways than those described herein, and therefore the scope of protection of the present application is not limited to the limitations of the specific embodiments disclosed below.

[0049] Hereinafter, several embodiments of the present invention will be described with reference to FIGS.

[0050] As shown in Figures 1 and 2, the stator structure 102 proposed in this embodiment includes a stator core 1022 and two types of grooves provided in the stator core 1022, specifically, a first groove 1026 and a second groove 1030. The stator core 1022 itself includes two types of conventional structures, a stator yoke 1023 and stator teeth 1024, both of which are positioned such that the stator teeth 1024 are provided radially inside the stator yoke 1023, i.e., the stator yoke 1023 extends radially inward to form the stator teeth 1024. Regarding the first groove 1026 and the second groove 1030, the first groove 1026 is a slot base that is recessed inward from the outer wall of the stator yoke 1023, i.e., the side wall on one side away from the axis of the stator core 1022, and the second groove 1030 is recessed further inward from the first groove 1026, i.e., the second groove 1030 extends from the slot bottom of the first groove 1026 toward the axis of the stator core 1022. In this way, a configuration is obtained in which two layers of grooves are stacked, which plays a role in suppressing noise while ensuring motor efficiency.

[0051] Furthermore, the second groove 1030 mainly includes two types of slots, which have different shapes, specifically, different projected outlines on the end face of the stator core. The first slots 1031 and the second slots 1032 are spaced apart and are not connected but separate from each other. The first slots 1031 and the second slots 1032 are combined with the first groove to form different slot structures, thereby significantly reducing high-frequency carrier noise during operation through the cooperation of the first groove and the second groove 1030. By configuring the first slots 1031 and the second slots 1032 corresponding to the second groove 1030 so that there is a difference in projected area, motor noise can be significantly reduced, especially high-frequency carrier noise.

[0052] The thickness of the stator yoke 1023 is the dimension of the stator yoke 1023 in the radial direction of the stator core 1022 .

[0053] The depth of the first recessed groove 1026 is a dimension that extends radially inward from the outer edge of the stator core 1022.

[0054] Furthermore, since the second groove 1030 extends inward from the first groove 1026 , the slot width of the second groove 1030 is generally equal to or smaller than the slot width of the first groove 1026 .

[0055] Furthermore, as shown in FIG. 3, the stator core 1022 is formed by stacking a plurality of stator punching sheets 1034 in the axial direction, and each stator punching sheet 1034 is provided with a stator yoke, stator teeth, and winding slots. The stator teeth are provided on the stator yoke, and a winding slot is formed between two adjacent stator teeth, thereby allowing the stator winding to be wound in the winding slot, generating a magnetic field for the rotor and realizing the function of the stator.

[0056] Furthermore, the material of the stator punching sheet 1034 is a silicon steel plate or other soft magnetic material sheet, and the thickness is 0.35 mm or less.

[0057] In one specific embodiment, the projected area SA of the first groove is determined by the number of stator teeth Q, the thickness y of the stator yoke, and the outer diameter D of the stator core:

number

[0058] The projection area of ​​the first groove is limited, specifically, the projection area SA of the first groove, the number of stator teeth Q, the thickness y of the stator yoke, and the outer diameter D of the stator core are calculated using the above formula, and the calculated ratio is limited to the range of 0.157 to 0.785, which satisfies the need to reduce high-frequency carrier noise during operation and achieves the effect of noise reduction.

[0059] In one particular embodiment, the projected area SB of the first slot is determined by the number of stator teeth Q, the thickness y of the stator yoke, and the outer diameter D of the stator core,

number

[0060] By limiting the projected area of ​​the first slot, specifically, by calculating the projected area SB of the first slot, the number of stator teeth Q, the thickness y of the stator yoke, and the outer diameter D of the stator core according to the above formula, and limiting the calculated ratio value to the range of 0.052 to 0.3925, the need for reducing high-frequency carrier noise during operation can be well met, and the effect of noise reduction can be achieved.

[0061] In one particular embodiment, the projected area SC of the second slot is determined by the number of stator teeth Q, the thickness y of the stator yoke, and the outer diameter D of the stator core,

number

[0062] The projected area of ​​the second slot is limited, specifically, the projected area S of the second slot is limited. C The number of stator teeth Q, the thickness y of the stator yoke, and the outer diameter D of the stator core are calculated using the above formula, and the calculated ratio is limited to the range of 0.052 to 0.3925, thereby meeting the need to reduce high-frequency carrier noise during operation and achieving the effect of noise reduction.

[0063] As shown in Figures 1 and 2, the stator structure 102 proposed in another embodiment of the present application includes a stator core 1022 and two types of grooves provided in the stator core 1022, specifically, a first groove 1026 and a second groove 1030. The stator core 1022 itself includes two types of conventional structures, a stator yoke 1023 and stator teeth 1024, both of which are positioned such that the stator teeth 1024 are provided radially inside the stator yoke 1023, i.e., the stator yoke 1023 extends radially inward to form the stator teeth 1024. Regarding the first groove 1026 and the second groove 1030, the first groove 1026 is a slot base that is recessed inward from the outer wall of the stator yoke 1023, i.e., the side wall on one side away from the axis of the stator core 1022, and the second groove 1030 is recessed further inward from the first groove 1026, i.e., the second groove 1030 extends from the slot bottom of the first groove 1026 toward the axis of the stator core 1022. In this way, a configuration is obtained in which two layers of grooves are stacked, which plays a role in suppressing noise while ensuring motor efficiency.

[0064] Furthermore, the second groove 1030 mainly includes two types of slots, which have different shapes, specifically, different projected outlines on the end face of the stator core. The first slots 1031 and the second slots 1032 are spaced apart and are not connected but separate from each other. The first slots 1031 and the second slots 1032 are combined with the first groove to form different slot structures, and the cooperation of the first groove and the second groove 1030 significantly reduces high-frequency carrier noise during operation. By configuring the first slots 1031 and the second slots 1032 corresponding to the second groove 1030 so that there is a difference in projected area, motor noise, especially high-frequency carrier noise, can be significantly reduced.

[0065] The thickness of the stator yoke 1023 is the dimension of the stator yoke 1023 in the radial direction of the stator core 1022 .

[0066] The depth of the first recessed groove 1026 is a dimension that extends radially inward from the outer edge of the stator core 1022.

[0067] Furthermore, since the second groove 1030 extends inward from the first groove 1026 , the slot width of the second groove 1030 is generally equal to or smaller than the slot width of the first groove 1026 .

[0068] In one particular embodiment, the first slot 1031 is a rectangular slot and the second slot 1032 is an arc-shaped slot, using a conventional structure to make processing and manufacturing easier.

[0069] In one particular embodiment, the number of first slots 1031 is an odd number greater than or equal to three, thereby ensuring normal motor efficiency during operation.

[0070] In another particular embodiment, the number of second slots 1032 is an odd number greater than or equal to three, thereby ensuring normal motor efficiency during operation.

[0071] Furthermore, the first slots are rectangular slots and there are three of them, and the second slots are arc-shaped slots and there are Q-3 of them.

[0072] It is understood that the sum of the number of the first slots 1031 and the number of the second slots 1032 is equal to the number of the first recesses.

[0073] Furthermore, the number of first slots 1031 and second slots 1032 is three or more.

[0074] Here, by providing at least one of the first slots 1031 and the second slots 1032 evenly in the stator core, a relatively uniform magnetic field is generated, which is advantageous for driving the rotor structure to rotate.

[0075] Of course, if both the first slots 1031 and the second slots 1032 are evenly distributed in the stator core, it can greatly improve the driving effect on the rotor structure, that is, increase the motor efficiency of the entire motor structure.

[0076] As shown in Figures 1 and 2, the stator structure 102 proposed in another embodiment of the present application includes a stator core 1022 and two types of grooves provided in the stator core 1022, specifically, a first groove 1026 and a second groove 1030. The stator core 1022 itself includes two types of conventional structures, a stator yoke 1023 and stator teeth 1024, both of which are positioned such that the stator teeth 1024 are provided radially inside the stator yoke 1023, i.e., the stator yoke 1023 extends radially inward to form the stator teeth 1024. Regarding the first groove 1026 and the second groove 1030, the first groove 1026 is a slot base that is recessed inward from the outer wall of the stator yoke 1023, i.e., the side wall on one side away from the axis of the stator core 1022, and the second groove 1030 is recessed further inward from the first groove 1026, i.e., the second groove 1030 extends from the slot bottom of the first groove 1026 toward the axis of the stator core 1022. In this way, a configuration is obtained in which two layers of grooves are stacked, which plays a role in suppressing noise while ensuring motor efficiency.

[0077] Furthermore, the second groove 1030 mainly includes two types of slots, which have different shapes, specifically, different projected outlines on the end face of the stator core. The first slots 1031 and the second slots 1032 are spaced apart and are not connected but separate from each other. The first slots 1031 and the second slots 1032 are combined with the first groove to form different slot structures, thereby significantly reducing high-frequency carrier noise during operation through the cooperation of the first groove and the second groove 1030. By configuring the first slots 1031 and the second slots 1032 corresponding to the second groove 1030 so that there is a difference in projected area, motor noise can be significantly reduced, especially high-frequency carrier noise.

[0078] Here, the thickness of the stator yoke 1023 is the dimension of the stator yoke 1023 in the radial direction of the stator core 1022.

[0079] Here, the depth of the first recessed groove 1026 is a dimension extending radially inward from the outer edge of the stator core 1022.

[0080] Furthermore, since the second groove 1030 extends inward from the first groove 1026 , the slot width of the second groove 1030 is generally equal to or smaller than the slot width of the first groove 1026 .

[0081] More specifically, as shown in FIG. 2, the area SA of groove A (i.e., the first groove), the area SB of groove B (i.e., the first slot), the area SC of groove C (i.e., the second slot), the outer diameter D of the stator, the thickness y of the stator yoke, and the number of slots Q of the stator satisfy the following equations: 0.157≦Q×SA / (yD-y2)≦0.785, 0.052≦Q×SB / (yD-y2)≦0.3925, 0.052≦Q×SC / (yD-y2)≦0.052, and SB≠SC, and the unit of the area SA of groove A is mm. 2 and the area SB of the groove B is in mm 2 and the area SC of the groove C is in mm 2where the unit of the outer diameter D of the stator is mm, and the unit of the thickness y of the stator yoke is mm. The present invention can improve the noise of high frequency carrier waves of motors and compressors.

[0082] 5, a motor structure 100 further proposed in another embodiment of the present application includes two parts: a stator structure 102 and a rotor structure 104. The stator structure 102 has the structure described in any of the above embodiments. In a stator core 1022, stator windings are provided in the winding slots by winding wires around stator teeth 1024. This applies a driving force to the rotor structure 104 by a normal magnetic field, thereby realizing rotation of the rotor structure 104. Specifically, the rotor structure 104 is provided coaxially with the stator structure 102 and mainly includes two parts: a rotor core 1042 and a permanent magnet 1044. When a vector magnetic field is generated by passing current through the stator structure 102, the magnetic components rotate due to the magnetic force, thereby realizing movement of the rotor structure 104.

[0083] The axis of the stator core 1022 and the axis of the rotor core 1042 are on the same line, and the stator teeth 1024 and permanent magnets 1044 are both arranged around this axis, and are generally evenly spaced.

[0084] Furthermore, the cross-sectional shape of the permanent magnet 1044 is symmetrical to facilitate processing and installation. Specifically, the permanent magnet 1044 may be any combination of three shapes, or may be a pure straight line segment, provided that the projected contour of the permanent magnet 1044 is perpendicular to the central axis under the symmetrical constraint. Alternatively, the permanent magnet 1044 may be a symmetrical straight line segment or may be understood as a folded line segment, in which case there are many possibilities for the projected contour, including, but not limited to, V-shape, W-shape, etc. In yet another case, the permanent magnet 1044 may be a pure curved line segment, in which case the symmetrical shape must be maintained, and may be a single arc line or a combination of multiple arc lines.

[0085] Of course, it may be a combination of curved and straight segments, as long as the structure is symmetrical.

[0086] Furthermore, the number Q of stator teeth 1024, the number of permanent magnets Number of pole pairs p and the number of phases m of the motor structure 100 are

number

[0087] The number of stator teeth is 1024. ,B Data polar pair Number and By limiting the number of phases to less than twice the product of the number of phases, a fractional slot motor can be created. This effectively reduces the high-order harmonic potentials generated by the non-sinusoidal distribution of the magnetic pole magnetic field. It also reduces the amplitude of the harmonic potentials on the teeth, improving their waveforms. Furthermore, the use of a fractional slot motor effectively reduces the pulse amplitude of the magnetic flux and reduces pulse loss on the pole faces.

[0088] Here, as shown in FIG. 4, the rotor core is formed by stacking multiple rotor punching sheets 1046 in the axial direction, and the rotor punching sheets 1046 are made of silicon steel plate or other soft magnetic material sheet, and have a thickness of 0.35 mm or less.

[0089] Furthermore, the length of the rotor core 1042 is equal to or greater than the length of the stator core 1022 .

[0090] Furthermore, the stator Number of teeth Q is 6 or greater.

[0091] Furthermore, the number of rotor pole pairs , i.e., the number of pole pairs of the permanent magnet p is 2 or greater.

[0092] Furthermore, the stator Number of teeth , rotor poles versusThe number of inverters and the number of motor phases must satisfy Q / 2mp<1.

[0093] Furthermore, the windings are made of enameled wire.

[0094] Furthermore, both the stator core 1022 and the rotor core are made by laminating silicon steel plates.

[0095] As shown in FIG. 6, the compressor structure 200 proposed in this embodiment includes a housing 202 and a motor structure 100 provided in the housing 202, and the motor structure 100 described in any of the above embodiments is provided in the housing 202, and therefore has the beneficial effects of the above motor structure 100, so it will not be described in detail here.

[0096] As shown in FIG. 7, the refrigeration device 300 proposed in this embodiment includes a box 302 and a compressor structure 200 provided in the box 302, and the compressor structure 200 described in the above-mentioned embodiment 5 is provided in the refrigeration device 300. Therefore, since the beneficial effects of the above-mentioned compressor structure 200 are obtained, they will not be described in detail here.

[0097] Here, the refrigeration device 300 includes, but is not limited to, devices with a refrigeration function, such as a refrigerator, a freezer, and an air conditioner.

[0098] The stator structure, motor structure, compressor structure, and refrigeration device according to the present application can significantly improve motor noise, and in particular, can significantly reduce noise of high frequency carrier waves.

[0099] In this application, the terms "first," "second," and "third" are used for descriptive purposes only and are not understood to indicate or imply relative importance. The term "plurality" means two or more unless expressly limited otherwise. Terms such as "attach," "coupled," "connected," and "fixed" should be understood broadly; for example, "connected" may be a fixed connection, a detachable connection, or an integral connection, and "connected" may be a direct connection or an indirect connection via an intermediate medium. Those skilled in the art will be able to understand the specific meaning of the above terms in this application depending on the context.

[0100] In the description of this application, the orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "front," and "rear" are based on the orientations or positional relationships shown in the drawings, and are intended merely to facilitate and simplify the description of this application. They do not indicate or imply that the device must have a specific orientation, or be configured or operate in a specific orientation, and therefore should not be understood as limiting this application.

[0101] In the description herein, the terms "one embodiment," "some embodiments," "particular embodiment," etc., mean that a particular feature, structure, material, or characteristic described with reference to that embodiment or example is included in at least one embodiment or example of the present application. References herein to general terms do not necessarily refer to the same embodiment or example. Furthermore, the described particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

[0102] The above is only a preferred embodiment of the present application, and does not limit the present application, and various modifications and variations are possible for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application. In FIGS. 1 to 7, the correspondence between the reference numerals and the names of the parts is as follows: [Explanation of symbols]

[0103] 100: motor structure, 102: stator structure, 1022: stator core, 1023: stator yoke, 1024: stator tooth, 1026: first groove, 1030: second groove, 1031: first slot, 1032: second slot, 1034: stator punching sheet, 104: rotor structure, 1042: rotor core, 1044: permanent magnet, 1046: rotor punching sheet, 200: compressor structure, 202: housing, 300: refrigeration device, 302: box body

Claims

1. A stator structure, a stator core including a stator yoke and a plurality of stator teeth extending radially inward from the stator yoke; first grooves provided in a side wall of the stator yoke on one side away from the axis of the stator core, all of the first grooves having the same shape in a cross section perpendicular to the axis of the stator core; a second groove provided in the first groove and extending from a slot bottom of the first groove toward an axis of the stator core, Here, the second groove includes a first slot and a second slot spaced apart in the circumferential direction of the stator core, and a projected area of ​​the first slot and a projected area of ​​the second slot are different on an end surface of the stator core, The projected area SA of the first groove is determined by the number Q of the stator teeth, the thickness y of the stator yoke, and the outer diameter D of the stator core. [Equation 9] Satisfy the relationship of Stator structure.

2. The projected area SB of the first slot is determined by the number Q of the stator teeth, the thickness y of the stator yoke, and the outer diameter D of the stator core, [Equation 10] Satisfy the relationship of The stator structure according to claim 1 .

3. The projected area SC of the second slot is determined by the number Q of the stator teeth, the thickness y of the stator yoke, and the outer diameter D of the stator core, [0011] Satisfy the relationship of The stator structure according to claim 1 .

4. The first slot is a rectangular slot and the second slot is an arc-shaped slot. The stator structure according to any one of claims 1 to 3.

5. the number of first slots is an odd number greater than or equal to 3; and / or the number of the second slots is an odd number equal to or greater than 3; The stator structure according to any one of claims 1 to 3.

6. the first slots are regularly arranged in the circumferential direction of the stator core, and / or The second slots are regularly arranged in the circumferential direction of the stator core. The stator structure according to any one of claims 1 to 3.

7. 4. The stator structure according to claim 1, wherein the stator core includes a plurality of stator punching sheets stacked in the axial direction of the stator core.

8. A motor structure, A stator structure according to any one of claims 1 to 7; a rotor structure provided coaxially with the stator structure, the rotor structure including a rotor core and a permanent magnet provided in the rotor core; Motor structure.

9. a projected outline of the permanent magnet on an end surface of the rotor core is symmetrical with respect to a central axis of two adjacent stator teeth; wherein the permanent magnet includes one or a combination of a straight line segment, a folded line segment, and a curved line segment; The motor structure of claim 8.

10. The number Q of stator teeth of the stator structure, the number p of pole pairs of the permanent magnet, and the number m of phases of the motor structure are [0012] In the relationship The motor structure of claim 8.

11. A compressor structure, Housing and The motor structure according to any one of claims 8 to 10 provided in the housing. Compressor structure.

12. A refrigeration device comprising: The box body and and the compressor structure of claim 11 disposed within the box. Refrigeration equipment.

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