Motor stator, motor and compressor

Abstract

The technical scheme of the invention discloses a motor stator, a motor and a compressor, the motor stator comprises a stator core and a stator winding, the stator core comprises a stator yoke and a plurality of stator teeth arranged at the inner side of the stator yoke at intervals, and two adjacent stator teeth form a stator slot. The groove bottom of the stator groove comprises a first groove section and a second groove section in the circumferential direction of the stator core, an included angle is formed between the first groove section and the second groove section, and at least one of the first groove section and the second groove section is linear; the joints of the first slot section and the slot side walls of the adjacent stator slots and the joints of the second slot section and the slot side walls of the adjacent stator slots are chamfered, and the radius of each chamfer is R1; the stator winding wire is wound in the stator groove, the wire diameter of the stator winding wire is RW, and R1 and RW meet the condition that R1 / RW is larger than or equal to 1 and smaller than or equal to 3. According to the technical scheme of the invention, the matching between the stator winding and the groove type structure of the stator groove can be increased, the regularity of the stator winding is ensured, the winding process is improved, the groove fullness rate of the motor stator is improved, and the motor efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a motor stator, a motor and a compressor. Background Art

[0002] In the prior art, a motor stator consists of a stator core and windings. The stator core is formed by laminating multiple stator laminations. To facilitate manufacturing, segmented enameled copper flat winding wire is inserted axially from the stator core into the stator slots and connected to form a complete winding, forming the armature coil. Because the winding wire diameter and the slot profile of the stator slot bottom do not perfectly match, the actual winding wire cannot reliably fit the stator slot bottom, resulting in some wasted winding space. This reduces the effective winding slot area and reduces motor efficiency. Summary of the Invention

[0003] The main purpose of the present invention is to provide a motor stator, aiming to improve the efficiency of the motor.

[0004] The technical solution of the present invention provides a motor stator, comprising:

[0005] A stator core comprises a stator yoke and a plurality of stator teeth spaced apart on an inner side of the stator yoke, wherein two adjacent stator teeth form a stator slot, wherein the slot bottom of the stator slot comprises a first slot segment and a second slot segment in the circumferential direction of the stator core, wherein the first slot segment and the second slot segment form an included angle, and at least one of the first slot segment and the second slot segment is linear; wherein the first slot segment and the second slot segment are chamfered at their respective connections to the sidewalls of the adjacent stator slots, and the chamfer radius is R1;

[0006] The stator winding is wound in the stator slots, and the wire diameter of the stator winding is R W , R1 and R W Satisfies: 1≤R1 / R W ≤3.

[0007] In one embodiment, the first slot segment and the second slot segment are both straight-line, and the first slot segment and the second slot segment are symmetrically arranged.

[0008] In one embodiment, the angle formed by the first slot segment and the second slot segment is θ, and 150°≤θ≤175°.

[0009] In one embodiment, the length of the first slot segment or the second slot segment is TH1, and after the maximum number of stator windings are placed along the first slot segment or the second slot segment, the remaining length of the first slot segment or the second slot segment is equal to R W The ratio of KTH1 to R W Satisfies: KTH1=[TH1-Floor(TH1 / R W)*R W ] / R W , KTH1∈(0~0.677).

[0010] In one embodiment, the slot bottom of the stator slot further includes a third slot segment in the circumferential direction of the stator core. The third slot segment is arranged between the first slot segment and the second slot segment and connects the first slot segment and the second slot segment. The third slot segment is straight or arc-shaped.

[0011] In one embodiment, the third slot segment is in an arc shape convex toward the center of the stator core.

[0012] In one embodiment, the length of the third slot segment is TH2, and after the stator winding is placed along the third slot segment for the maximum number of times, the remaining length of the third slot segment is equal to R W The ratio of KTH2 is KTH2 and R W Satisfies: KTH2=[TH2-Floor(TH2 / R W )*R W ] / R W , KTH2∈(0~0.677).

[0013] In one embodiment, the two side walls of the stator tooth away from the stator yoke are respectively provided with stator pole shoes facing the adjacent stator teeth, and the connection between the inner side wall of the stator pole shoe and the slot side wall of the stator slot is chamfered, and the radius of the chamfer is R2, R2 and R W Satisfy: 0.5≤R2 / R W ≤4.

[0014] In one embodiment, the length of the slot sidewall of the stator slot extending in the radial direction of the stator core is TH3, and after the maximum number of stator windings are placed along the slot sidewall of the stator slot, the remaining length of the slot sidewall of the stator slot is equal to R W The ratio of KTH3 to R W Satisfies: KTH3=[TH3-Floor(TH3 / R W )*R W ] / R W , KTH3∈(0~0.677).

[0015] In one embodiment, the length of the inner side wall of the stator pole shoe is TH4, and after the stator winding is placed along the inner side wall of the stator pole shoe for the maximum number, the remaining length of the inner side wall of the stator pole shoe is equal to R W The ratio of KTH4 to R W Satisfies: KTH4=[TH4-Floor(TH4 / R W )*R W ] / RW , KTH4∈(0~0.677).

[0016] In one embodiment, the first slot segment and the second slot segment are respectively connected to the slot sidewalls of the adjacent stator slots with rounded corners;

[0017] And / or, the connection between the inner side wall of the stator pole shoe and the slot side wall of the stator slot is rounded.

[0018] In one embodiment, R1≤2mm;

[0019] and / or, R2≤2mm;

[0020] and / or, 0.1mm≤R W ≤2mm.

[0021] The present invention also provides a motor, comprising the aforementioned motor stator.

[0022] The present invention also provides a compressor, comprising the aforementioned motor.

[0023] The technical solution of the present invention is to set at least one of the first slot segment and the second slot segment as a straight line, and the radius R1 of the chamfer at the connection between the first slot segment and the second slot segment and the slot side wall of the adjacent stator slot and the wire diameter R W Satisfies: 1≤R1 / R W ≤3, which can increase the matching between the stator winding and the slot structure of the stator slot, ensure the regularity of the stator winding, and help improve the winding process, increase the slot fill rate of the motor stator, and thus improve the motor efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0025] Figure 1 It is a structural schematic diagram of the motor stator of the original embodiment;

[0026] Figure 2 Schematic diagram of the structure of the motor stator in the first embodiment of the present invention;

[0027] Figure 3 for Figure 2 A partial enlarged view of the middle part;

[0028] Figure 4Schematic diagram of the structure of the motor stator according to the second embodiment of the present invention;

[0029] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0030] Figure 6 Schematic diagram of the structure of the motor stator according to the third embodiment of the present invention;

[0031] Figure 7 for Figure 6 A partial enlarged view of point C in the middle;

[0032] Figure 8 R1 / R W Relationship diagram of the number of turns at the arc base;

[0033] Figure 9 R2 / R W Relationship diagram of the number of turns at the arc base;

[0034] Figure 10 This is the relationship diagram of KTH and the number of arc base turns;

[0035] Figure 11 4 is a comparison chart of the motor efficiency and slot fill rate of the three embodiments of the present invention and the original example.

[0036] Description of Figure Numbers:

[0037] Label name Label name 10 Motor stator 110 stator yoke 100 stator core 120 stator teeth 200 stator winding 130 stator slots 131 First slot section 140 stator pole shoes 132 Second slot section 133 The third slot

[0038] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] Please refer to Figure 2 and Figure 3 The present invention provides a motor stator 10, comprising a stator core 100 and a stator winding 200. The stator core 100 comprises a stator yoke 110 and a plurality of stator teeth 120 spaced apart on the inner side of the stator yoke 110. Two adjacent stator teeth 120 form a stator slot 130. The bottom of the stator slot 130 comprises a first slot segment 131 and a second slot segment 132 in the circumferential direction of the stator core 100. The first slot segment 131 and the second slot segment 132 form an angle. At least one of the first slot segment 131 and the second slot segment 132 is linear. The first slot segment 131 and the second slot segment 132 are chamfered at their respective connections to the slot sidewalls of the adjacent stator slots 130. The radius of the chamfer is R1. The stator winding 200 is wound in the stator slot 130. The wire diameter of the stator winding 200 is R W , R1 and R W Satisfies: 1≤R1 / R W ≤3.

[0043] Specifically, the motor stator 10 includes a stator core 100, which is formed from laminated silicon steel sheets, and stator windings 200. The stator core 100 comprises a stator yoke 110 and stator teeth 120. The stator yoke 110 is annular, with a plurality of stator teeth 120 spaced apart along the inner side of the stator yoke 110. Adjacent stator teeth 120 define stator slots 130, with the number of stator slots 130 matching the number of stator teeth 120. The stator windings 200 pass through the stator slots 130 and are directly wound around the stator teeth 120.

[0044] The bottom of the stator slot 130 includes a first slot segment 131 and a second slot segment 132 in the circumferential direction of the stator core 100. The first slot segment 131 and the second slot segment 132 can be directly connected and form an angle; the first slot segment 131 and the second slot segment 132 can also be indirectly connected through other slot segments, with their extended lines intersecting and forming an angle. The first slot segment 131 and the second slot segment 132 can be one straight line and the other curved or in other shapes. For example, the first slot segment 131 of a stator slot 130 can be straight line and the second slot segment 132 can be curved; the second slot segment 132 of another stator slot 130 adjacent to the first slot segment 131 can be straight line, and the first slot segment 131 of another stator slot 130 adjacent to the second slot segment 132 can be curved. The first slot segment 131 and the second slot segment 132 can also both be straight lines. By optimizing the design of the first slot segment 131 and the second slot segment 132, the stator winding 200 is more closely matched with the slot structure of the bottom of the stator slot 130, thereby making the stator winding 200 more compactly arranged in the stator slot 130. While increasing the slot fill rate, it can also reduce the loss and resistance of the winding, achieve more efficient electromagnetic energy conversion, improve the power density and working efficiency of the motor, and further enhance the performance of the motor in various application scenarios.

[0045] The connection between the first slot segment 131 and the second slot segment 132 and the adjacent stator slot 130 is chamfered, which can be a right angle or a rounded angle, and the radius of the chamfer is R1. The wire diameter of the stator winding 200 is R W , when R1 / R W When R1 / R W When the angle is greater than 3, the chamfer is too large, which reduces the space of the stator slot 130, making it difficult to place more stator windings 200 and also reducing the motor efficiency.

[0046] Combine Figure 8 It can be seen that when R1 and R W Satisfies: 1≤R1 / R W When ≤3, while ensuring a larger space in the stator slot 130, the stator winding 200 can better match and fit the slot wall of the stator slot 130 at the chamfer, and improve the regularity of the stator winding 200 arrangement, the equivalent stator winding 200 is improved, and the number is increased by 1 to 2 turns, thereby further improving the slot fill rate of the motor stator 10, and thus improving the motor efficiency.

[0047] The technical solution of the present invention is to set at least one of the first slot segment 131 and the second slot segment 132 as a straight line, and the radius R1 of the chamfer at the connection between the first slot segment 131 and the second slot segment 132 and the adjacent slot side wall of the stator slot 130 and the wire diameter R W Satisfies: 1≤R1 / R W ≤3, which can increase the matching of the slot structure of the stator winding 200 and the stator slot 130, ensure the regularity of the stator winding 200, and be beneficial to improving the winding process, increasing the slot fill rate of the motor stator 10, and thus improving the motor efficiency.

[0048] In one embodiment, the first slot section 131 and the second slot section 132 are both linear, and the first slot section 131 and the second slot section 132 are symmetrically arranged.

[0049] Please refer to Figure 3 The first slot segment 131 and the second slot segment 132 are both linear, further improving the matching degree between the stator winding 200 and the entire stator slot 130, making the stator winding 200 more regular, better improving the slot fill rate, and more effectively improving the efficiency of the motor. Furthermore, the symmetrical arrangement of the first slot segment 131 and the second slot segment 132 makes the structure of the stator slot 130 more uniform and symmetrical, making the shape of the stator slot 130 more regular, facilitating the arrangement and insulation of the winding, reducing electromagnetic losses, and improving the performance and efficiency of the motor. Furthermore, this symmetrical arrangement helps to reduce the difficulty of machining the stator slot 130 and improve production efficiency.

[0050] In one embodiment, the angle formed by the first slot segment 131 and the second slot segment 132 is θ, and 150°≤θ≤175°.

[0051] Please refer to Figure 3 When θ is less than 150°, or θ is greater than or equal to 180°, the space of the stator slot 130 is reduced, which is not conducive to arranging more stator windings 200, and the slot filling rate of the motor stator 10 is reduced, thereby reducing the motor efficiency. When 175° is less than θ and less than 180°, the matching degree between the stator winding 200 and the slot structure of the bottom of the stator slot 130 is low, so that the arrangement of the stator winding 200 in the stator slot 130 is not compact enough, the slot filling rate of the motor stator 10 is reduced, and the motor efficiency is low. When 150°≤θ≤175°, while ensuring a larger space in the stator slot 130, the matching degree between the stator winding 200 and the slot structure of the bottom of the stator slot 130 is higher, which can improve the regularity of the stator winding 200 arrangement, thereby further improving the slot filling rate of the motor stator 10, and thus improving the motor efficiency.

[0052] In one embodiment, the length of the first slot segment 131 or the second slot segment 132 is TH1. After the stator winding 200 is placed along the first slot segment 131 or the second slot segment 132 in maximum quantity, the remaining length of the first slot segment 131 or the second slot segment 132 is equal to R W The ratio of KTH1 to R W Satisfies: KTH1=[TH1-Floor(TH1 / R W )*R W ] / R W , KTH1∈(0~0.677).

[0053] Please refer to Figure 3 and Figure 10 When the first slot segment 131 or the second slot segment 132 is straight, its length is TH1. When one of the first slot segment 131 or the second slot segment 132 is arc-shaped, the straight-line distance between its two ends is TH1. KTH1 represents the remaining length of the first slot segment 131 or the second slot segment 132 after the maximum number of stator windings 200 are placed along the first slot segment 131 or the second slot segment 132, and the length of R W When the ratio KTH1∈(0-0.677), the number of turns of the stator winding 200 can be increased by chamfering. That is, the number of turns of the stator winding 200 along the first slot segment 131 or the second slot segment 132 can be increased by one turn by chamfering the first slot segment 131 or the second slot segment 132. Where Floor represents a floor function.

[0054] In one embodiment, the slot bottom of the stator slot 130 further includes a third slot segment 133 in the circumferential direction of the stator core 100. The third slot segment 133 is arranged between the first slot segment 131 and the second slot segment 132, and connects the first slot segment 131 and the second slot segment 132. The third slot segment 133 is linear or arc-shaped.

[0055] Please refer to Figures 2 to 7 The third slot segment 133 is disposed between the first slot segment 131 and the second slot segment 132, and connects the first slot segment 131 and the second slot segment 132. The area of ​​the third slot segment 133 extending radially toward the center of the stator core 100 can serve as a buffer between the areas of the first slot segment 131 and the second slot segment 132 extending radially toward the center of the stator core 100. The stator winding 200 may or may not be placed in the area of ​​the third slot segment 133 extending radially toward the center of the stator core 100. The third slot segment 133 can be linear or arc-shaped. When the third slot segment 133 is arc-shaped, it can be convex toward the center of the stator core 100 or concave away from the center of the stator core 100.

[0056] By adding a third slot segment 133 between the first slot segment 131 and the second slot segment 132 and optimizing the shape of the third slot segment 133, the structure of the stator slot 130 becomes more complex and diverse, which can better utilize the space of the stator core 100 and improve the matching degree between the stator winding 200 and the stator slot 130. This is conducive to further optimizing the layout of the stator winding 200, further improving the winding process, and increasing the flexibility and efficiency of the winding process, thereby further improving the performance and efficiency of the motor.

[0057] In one embodiment, the third slot segment 133 is in an arc shape that bulges outward toward the center of the stator core 100 .

[0058] Please refer to Figure 7 The convex shape of the third slot segment 133 toward the center of the stator core 100 limits the stator winding 200 of the first slot segment 131 and the second slot segment 132, thereby ensuring the reliability of insulation between the stator winding 200 of the first slot segment 131 and the second slot segment 132 while ensuring the increase in the number of turns of the stator winding 200.

[0059] In one embodiment, the length of the third slot segment 133 is TH2. After the stator winding 200 is placed along the third slot segment 133 in maximum quantity, the remaining length of the third slot segment 133 is equal to R W The ratio of KTH2 is KTH2 and R W Satisfies: KTH2=[TH2-Floor(TH2 / R W )*R W ] / R W , KTH2∈(0~0.677).

[0060] Please refer to Figure 3 and Figure 10 When the third slot segment 133 is straight, its length is TH2; when the third slot segment 133 is arc-shaped, the straight-line distance between its two ends is TH2. KTH2 represents the remaining length of the third slot segment 133 after the maximum number of stator windings 200 are placed along the third slot segment 133 and the length of R W When the ratio KTH2∈(0-0.677), the number of turns of the stator winding 200 along the third slot segment 133 can be increased by 1 turn. Wherein Floor represents a floor rounding function.

[0061] In one embodiment, the two side walls of the stator tooth 120 away from the stator yoke 110 are respectively provided with stator pole shoes 140 facing the adjacent stator teeth 120, and the connection between the inner side wall of the stator pole shoe 140 and the slot side wall of the stator slot 130 is chamfered, and the radius of the chamfer is R2, R2 and R W Satisfy: 0.5≤R2 / R W ≤4.

[0062] Please refer to Figure 3 The inner sidewall of the stator pole shoe 140 forms an angle with the sidewall of the stator slot 130, and the angle is an obtuse angle. While increasing the internal space of the stator slot 130, it also facilitates the stator winding 200 to match and fit the slot wall of the stator slot 130. The connection between the inner sidewall of the stator pole shoe 140 and the slot wall of the stator slot 130 is chamfered, which can be a chamfered right angle or a chamfered corner, and the radius of the chamfer is R2. The wire diameter of the stator winding 200 is R W , when R2 / R W <0.5 and R1 / R W When the value is greater than 4, the chamfers at the connection between the inner side wall of the stator pole shoe 140 and the side wall of the stator slot 130 are correspondingly too small and too large, resulting in the stator winding 200 being unable to fit reliably. As a result, there is partial waste of space at the connection between the inner side wall of the stator pole shoe 140 and the side wall of the stator slot 130, the effective slot area of ​​the winding will be reduced, and the efficiency of the motor will be reduced.

[0063] Combine Figure 9 It can be seen that when R2 and R W Satisfy: 0.5≤R2 / R W When ≤4, while ensuring a larger space for the stator slot 130, the stator winding 200 can be more matched and fitted at the connection between the inner wall of the stator pole shoe 140 and the slot side wall of the stator slot 130, and the regularity of the arrangement of the stator winding 200 is improved, the equivalent stator winding 200 is improved, and the number is increased by 1 to 2 turns, thereby further improving the slot fill rate of the motor stator 10, and thus improving the motor efficiency.

[0064] In one embodiment, the length of the slot sidewall of the stator slot 130 extending in the radial direction of the stator core 100 is TH3. After the stator winding 200 is placed along the slot sidewall of the stator slot 130 in maximum quantity, the remaining length of the slot sidewall of the stator slot 130 is equal to R W The ratio of KTH3 to R W Satisfies: KTH3=[TH3-Floor(TH3 / R W )*R W ] / R W , KTH3∈(0~0.677).

[0065] Please refer to Figure 3 and Figure 10 The length of the slot sidewall of the stator slot 130 extending in the radial direction of the stator core 100 is TH3, and KTH3 represents the remaining length of the slot sidewall of the stator slot 130 after the maximum number of stator windings 200 are placed along the slot sidewall of the stator slot 130 and R WWhen the ratio KTH3∈(0-0.677), the number of turns of the stator winding 200 can be increased by chamfering the connection between the inner sidewall of the stator pole shoe 140 and the sidewall of the stator slot 130. That is, the number of turns of the stator winding 200 along the sidewall of the stator slot 130 can be increased by one turn by chamfering the connection. Where Floor represents a floor function.

[0066] In one embodiment, the length of the inner side wall of the stator pole shoe 140 is TH4. After the stator winding 200 is placed along the inner side wall of the stator pole shoe 140 in maximum quantity, the remaining length of the inner side wall of the stator pole shoe 140 is equal to R W The ratio of KTH4 to R W Satisfies: KTH4=[TH4-Floor(TH4 / R W )*R W ] / R W , KTH4∈(0~0.677).

[0067] Please refer to Figure 3 and Figure 10 , the length of the inner wall of the stator pole shoe 140 is TH4, KTH4 represents the remaining length of the inner wall of the stator pole shoe 140 after the maximum number of stator windings 200 are placed along the inner wall of the stator pole shoe 140 and R W When the ratio KTH4∈(0-0.677), the number of turns of the stator winding 200 can be increased by chamfering the connection between the inner sidewall of the stator pole shoe 140 and the sidewall of the stator slot 130. That is, the number of turns of the stator winding 200 along the inner sidewall of the stator pole shoe 140 can be increased by one turn by chamfering the connection. Where Floor represents a floor function.

[0068] In one embodiment, the connections between the first slot segment 131 and the second slot segment 132 and the slot side walls of the adjacent stator slots 130 are chamfered; and / or the connections between the inner side walls of the stator pole shoe 140 and the slot side walls of the stator slot 130 are chamfered.

[0069] Please refer to Figure 3 The first slot segment 131 and the second slot segment 132 are chamfered at their respective connections with the sidewalls of the adjacent stator slots 130. This improves the fit between the stator winding 200 and the bottom of the stator slot 130, further facilitating the compact arrangement of the stator winding 200 there. The connection between the inner sidewall of the stator pole shoe 140 and the sidewall of the stator slot 130 is also chamfered. This improves the fit between the stator winding 200 and the inner sidewall of the stator pole shoe 140 and the sidewall of the stator slot 130, further facilitating the compact arrangement of the stator winding 200 there. The chamfered corners also ensure the feasibility of the manufacturing process of the stator core 100.

[0070] In one embodiment, R1≤2mm; and / or, R2≤2mm; and / or, 0.1mm≤R W ≤2mm.

[0071] The wire diameter of the stator winding 200 is R W , 0.1mm≤R W ≤2mm, the stator winding 200 is not easily torn during winding, while maintaining winding speed; it also ensures sufficient current conduction capability while ensuring that the resistance is not excessively high. The chamfer radius R1 at the connection between the first slot segment 131 and the second slot segment 132 and the adjacent slot sidewall of the stator slot 130 is 0.1mm≤R1≤2mm. The chamfer radius R2 at the connection between the inner sidewall of the stator pole shoe 140 and the slot sidewall of the stator slot 130 is 0.05mm≤R1≤2mm.

[0072] Please refer to Figure 1 In an original example, the bottom of the stator slot 130 is a continuous arc in the circumferential direction of the stator core 100, and the ratio of the chamfer radius at the connection between the bottom of the stator slot 130 and the side wall of the stator slot 130 to the wire diameter of the stator winding 200 is

[0073] Please refer to Figure 2 and Figure 3 In the first embodiment, the bottom of the stator slot 130 includes a first slot segment 131, a second slot segment 132, and a third slot segment 133. The stator winding 200 is wound in each of the first slot segment 131, the second slot segment 132, and the third slot segment 133. The third slot segment 133 is linear or arc-shaped and concave away from the center of the stator core 100. The chamfer angle at the connection between the first slot segment 131 and the second slot segment 132 and the slot side wall of the adjacent stator slot 130 is R1. The chamfer angle at the connection between the inner side wall of the stator pole shoe 140 and the slot side wall of the stator slot 130 is R2. The wire diameter of the stator winding 200 is R W , satisfying 1≤R1 / R W ≤3, and 0.5≤R2 / R W ≤4, satisfying KTH1, KTH2, KTH3, KTH4∈(0~0.677), and the number of turns of the stator winding 200 is increased.

[0074] Please refer to Figure 4 and Figure 5In the second embodiment, the bottom of the stator slot 130 includes a first slot segment 131, a second slot segment 132, and a third slot segment 133. The first slot segment 131 and the second slot segment 132 are both wound with stator windings 200. The third slot segment 133 is linear or arc-shaped and concave away from the center of the stator core 100. The third slot segment 133 does not hold the stator windings 200. The chamfer angles at the connection between the first slot segment 131 and the second slot segment 132 and the adjacent slot sidewalls of the stator slot 130 are R1. The chamfer angle at the connection between the inner sidewall of the stator pole shoe 140 and the slot sidewall of the stator slot 130 is R2. The wire diameter of the stator winding 200 is R W , satisfying 1≤R1 / R W ≤3, and 0.5≤R2 / R W ≤4, satisfying KTH1, KTH2, KTH3, KTH4∈(0~0.677), and the number of turns of the stator winding 200 is increased.

[0075] Please refer to Figure 6 and Figure 7 In the third embodiment, the bottom of the stator slot 130 includes a first slot section 131, a second slot section 132, and a third slot section 133. The stator winding 200 is wound in both the first slot section 131 and the second slot section 132. The third slot section 133 may be in an arc shape convex toward the center of the stator core 100. The stator winding 200 is not placed in the third slot section 133. The chamfer angle of the connection between the first slot section 131 and the second slot section 132 and the adjacent slot sidewalls of the stator slot 130 is R1. The chamfer angle of the connection between the inner sidewall of the stator pole shoe 140 and the slot sidewall of the stator slot 130 is R2. The wire diameter of the stator winding 200 is R W (The wire diameter of the stator winding 200 of the second embodiment is larger than that of the stator winding 200 of the first and third embodiments), satisfying 1≤R1 / R W ≤3, and 0.5≤R2 / R W ≤4, satisfying KTH1, KTH2, KTH3, KTH4∈(0~0.677), and the number of turns of the stator winding 200 is increased.

[0076] Please refer to Figure 11 Compared with the original example, the slot fill rate of the first embodiment, the second embodiment and the third embodiment increases by more than 2%, and the motor efficiency increases by more than 0.28%.

[0077] The present invention also proposes a motor, which includes a motor stator 10. The specific structure of the motor stator 10 refers to the above embodiment. Since this motor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0078] The present invention also proposes a compressor, which includes a motor. The specific structure of the motor refers to the above-mentioned embodiment. Since this compressor adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0079] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A motor stator, characterized in that: include: A stator core comprises a stator yoke and a plurality of stator teeth spaced apart on an inner side of the stator yoke, wherein two adjacent stator teeth form a stator slot, wherein the slot bottom of the stator slot comprises a first slot segment and a second slot segment in the circumferential direction of the stator core, wherein the first slot segment and the second slot segment form an included angle, and at least one of the first slot segment and the second slot segment is linear; wherein the first slot segment and the second slot segment are chamfered at their respective connections to the sidewalls of the adjacent stator slots, and the chamfer radius is R1; The stator winding is wound in the stator slots, and the wire diameter of the stator winding is R W , R1 and R W Satisfies: 1≤R1 / R W ≤3.

2. The motor stator according to claim 1, characterized in that: The first slot section and the second slot section are both straight-line, and the first slot section and the second slot section are symmetrically arranged.

3. The motor stator according to claim 2, characterized in that: An included angle formed by the first slot segment and the second slot segment is θ, and 150°≤θ≤175°.

4. The motor stator according to claim 2, characterized in that: The length of the first slot segment or the second slot segment is TH1. After the maximum number of stator windings are placed along the first slot segment or the second slot segment, the remaining length of the first slot segment or the second slot segment is equal to R W The ratio of KTH1 to R W Satisfies: KTH1=[TH1-Floor(TH1 / R W )*R W ] / R W , KTH1∈(0~0.677).

5. The motor stator according to any one of claim 2, characterized in that: The slot bottom of the stator slot also includes a third slot segment in the circumferential direction of the stator core. The third slot segment is arranged between the first slot segment and the second slot segment and connects the first slot segment and the second slot segment. The third slot segment is straight or arc-shaped.

6. The motor stator according to claim 5, characterized in that: The third slot segment is in an arc shape convex toward the center of the stator core.

7. The motor stator according to claim 5, characterized in that: The length of the third slot segment is TH2. After the stator winding is placed along the third slot segment for the maximum number of times, the remaining length of the third slot segment is equal to R W The ratio of KTH2 is KTH2 and R W Satisfies: KTH2=[TH2-Floor(TH2 / R W )*R W ] / R W , KTH2∈(0~0.677).

8. The motor stator according to any one of claims 1 to 7, characterized in that: The two side walls of the stator teeth at one end away from the stator yoke are respectively provided with stator pole shoes facing the adjacent stator teeth. The connection between the inner side wall of the stator pole shoe and the slot side wall of the stator slot is chamfered, and the radius of the chamfer is R2. R2 and R W Satisfy: 0.5≤R2 / R W ≤4.

9. The motor stator according to claim 8, characterized in that: The length of the slot sidewall of the stator slot extending in the radial direction of the stator core is TH3. After the maximum number of stator windings are placed along the slot sidewall of the stator slot, the remaining length of the slot sidewall of the stator slot is equal to R W The ratio of KTH3 to R W Satisfies: KTH3=[TH3-Floor(TH3 / R W )*R W ] / R W , KTH3∈(0~0.677).

10. The motor stator according to claim 8, characterized in that: The length of the inner side wall of the stator pole shoe is TH4. After the stator winding is placed along the inner side wall of the stator pole shoe for the maximum number of times, the remaining length of the inner side wall of the stator pole shoe is equal to R W The ratio of KTH4 to R W Satisfies: KTH4=[TH4-Floor(TH4 / R W )*R W ] / R W , KTH4∈(0~0.677).

11. The motor stator according to claim 8, characterized in that: The first slot segment and the second slot segment are respectively connected to the slot side walls of the adjacent stator slots with rounded corners; And / or, the connection between the inner side wall of the stator pole shoe and the slot side wall of the stator slot is rounded.

12. The motor stator according to claim 8, characterized in that: R1≤2mm; and / or, R2 ≤ 2 mm; and / or, 0.1mm≤R W ≤2mm.

13. A motor, characterized in that: The motor comprises the stator according to any one of claims 1 to 12.

14. A compressor, characterized in that: Comprising the motor as claimed in claim 13.

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