Stator core and motor, compressor, refrigeration device having the same

Abstract

The application discloses a kind of stator core and motor, compressor, refrigeration equipment with it, stator core includes: stator yoke and multiple stator tooth parts, stator tooth part is set to the inner peripheral surface of stator yoke along the circumferential direction of stator yoke and interval arrangement;Wherein, the number of stator tooth part is Q, in the axial section of stator core, the distance between the axis of stator core and the profile line of one end of stator tooth part away from stator yoke is L1, the maximum distance between the axis of stator core and connecting edge is L2, Q, L1, L2 satisfy the condition: L1 and L2 unit mm, Q>10.According to the stator core of the embodiment of the application, by controlling the value of Q, L1, L2, the motor can have a better copper-iron loss ratio, and the motor has a higher efficiency, which facilitates the reduction of the cost of motor.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more specifically, to a stator core and motors, compressors, and refrigeration equipment having the same. Background Technology

[0002] Copper and iron losses in motors are the main forms of energy loss during motor operation, which can lead to reduced motor efficiency and increased costs. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a stator core that, by controlling the values ​​of Q, L1, and L2, enables... This allows the motor to have a better copper-iron loss ratio, thereby increasing the motor's efficiency and making it easier to reduce the motor's cost.

[0004] The present invention also proposes an electric motor having the aforementioned stator core.

[0005] The present invention also proposes a compressor having the aforementioned motor.

[0006] The present invention also proposes a refrigeration device having the compressor.

[0007] According to a first aspect of the present invention, a stator core includes: a stator yoke and a plurality of stator teeth. The stator teeth are disposed circumferentially on the inner circumferential surface of the stator yoke and spaced apart. In an axial section of the stator core, the outer contour of the stator yoke includes two first straight edges disposed opposite each other in a first direction and two second straight edges disposed opposite each other in a second direction, the second direction being perpendicular to the first direction. The first straight edges and the second straight edges are connected by a connecting edge. The distance between each of the first and second straight edges and the axis of the stator core is less than the maximum distance between the connecting edge and the axis of the stator core. The number of stator teeth is Q. In an axial section of the stator core, the distance between the axis of the stator core and the end contour of the stator teeth away from the stator yoke is L1. The maximum distance between the axis of the stator core and the connecting edge is L2. Q, L1, and L2 satisfy the following conditions: The units for L1 and L2 are mm, and Q > 10.

[0008] According to an embodiment of the present invention, the stator core controls the values ​​of Q, L1, and L2 to achieve... This allows the motor to have a better copper-iron loss ratio, thereby increasing the motor's efficiency and making it easier to reduce the motor's cost.

[0009] In addition, the stator core according to the above embodiments of the present invention may also have the following additional technical features:

[0010] According to some embodiments of the present invention, in the axial section of the stator core, the minimum distance between the first straight edge and the second straight edge and the axis of the stator core is L3, wherein the units of L1 and L2 are mm, and the following conditions are satisfied:

[0011] According to some embodiments of the present invention, in the axial section of the stator core, the minimum distance between the first straight edge and the second straight edge and the axis of the stator core is L3, wherein the units of L2 and L3 are mm, and the following condition is satisfied:

[0012] According to some embodiments of the present invention, the connecting edge includes: a first connecting straight edge, the first connecting straight edge being arranged parallel to another straight edge, wherein in the first direction, the vertical distance from the axis of the stator core to the first connecting straight edge is less than the vertical distance from the axis of the stator core to the first straight edge; a second connecting straight edge, the second connecting straight edge being arranged parallel to another straight edge, wherein in the second direction, the vertical distance from the axis of the stator core to the second connecting straight edge is less than the vertical distance from the axis of the stator core to the second straight edge; and a connecting arc edge, one end of which is connected to one end of the first connecting straight edge, and the other end of which is connected to one end of the second connecting straight edge; in the adjacent first straight edge and second straight edge, the first straight edge is connected to the other end of the first connecting straight edge through a first transition edge, and the second straight edge is connected to the other end of the second connecting straight edge through a second transition edge; wherein, L2 is the maximum distance between the axis of the stator core and the connecting arc edge.

[0013] According to some embodiments of the present invention, the axial dimension of the stator core is H, wherein Q, H, and L1 satisfy the following condition: The units for H and L1 are mm.

[0014] According to some optional embodiments of the present invention, Q, H, and L1 satisfy the following conditions: Alternatively, 14mm≤H≤30mm.

[0015] According to some embodiments of the present invention, in the axial section of the stator core, the structures of the plurality of stator teeth are identical and are uniformly distributed with the axis of the stator core as the center of symmetry; the stator core includes a plurality of stator laminations stacked along the axial direction, each stator lamination being an integrally formed part.

[0016] According to a second aspect of the present invention, an electric motor is provided, the electric motor comprising: a rotor assembly, the rotor assembly including a rotor core and a plurality of magnetic elements, the rotor core having a plurality of magnet slots, the magnetic elements being installed in the magnet slots, the plurality of magnetic elements being arranged in a spoke-like manner along the circumference of the rotor core; and a stator assembly, the stator assembly being sleeved on the outside of the rotor assembly, the stator assembly including a stator core and a stator winding, the stator winding being wound around the stator teeth, the stator core being the stator core described in the first aspect of the present invention.

[0017] According to an embodiment of the electric motor of the present invention, by utilizing the stator core described in the first aspect of the present invention, the values ​​of Q, L1, and L2 are controlled to... This allows the motor to have a better copper-iron loss ratio, thereby increasing the motor's efficiency and making it easier to reduce the motor's cost.

[0018] According to a third aspect of the present invention, a compressor is provided, the compressor comprising the motor described in the second aspect of the present invention.

[0019] According to an embodiment of the compressor of the present invention, by utilizing the motor described in the second aspect of the present invention, the values ​​of Q, L1, and L2 are controlled to... This allows the motor to have a better copper-iron loss ratio, thereby increasing the motor's efficiency and making it easier to reduce the motor's cost.

[0020] According to a third aspect of the present invention, a refrigeration apparatus is provided, the refrigeration apparatus comprising a compressor as described in the third aspect of the present invention.

[0021] The refrigeration apparatus according to an embodiment of the present invention, by utilizing the compressor described in the third aspect of the present invention, controls the values ​​of Q, L1, and L2 to... This allows the motor to have a better copper-iron loss ratio, thereby increasing the motor's efficiency and making it easier to reduce the motor's cost.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a schematic diagram of the stator core structure according to an embodiment of the present invention;

[0025] Figure 2 According to an embodiment of the present invention The relationship between the value and the motor's efficiency, copper loss, and iron loss;

[0026] Figure 3 According to an embodiment of the present invention The relationship between the value and the motor's efficiency, copper loss, and iron loss;

[0027] Figure 4 According to an embodiment of the present invention The relationship between the value and the efficiency and cost of the motor;

[0028] Figure 5 yes Figure 1 Enlarged view of the central area;

[0029] Figure 6 According to an embodiment of the present invention The relationship between the value and the motor's efficiency and power density;

[0030] Figure 7 This is a schematic diagram of the stator core and rotor assembly according to an embodiment of the present invention.

[0031] Reference numerals: 100, stator core; 10, stator yoke; 11, first straight edge; 12, second straight edge; 13, connecting edge; 131, first connecting straight edge; 132, second connecting straight edge; 133, connecting arc edge; 134, first transition edge; 135, second transition edge;

[0032] 20. Stator teeth; 30. Stator slot; 31. First sidewall; 32. Second sidewall; 600. Rotor assembly. Detailed Implementation

[0033] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0034] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0035] The stator core 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0036] like Figure 1As shown, the stator core 100 according to an embodiment of the present invention includes a stator yoke 10 and a plurality of stator teeth 20.

[0037] The stator teeth 20 are disposed along the circumference of the stator yoke 10 on the inner circumferential surface of the stator yoke 10 and are spaced apart.

[0038] In the axial section of the stator core 100, the outer contour of the stator yoke 10 includes two first straight edges 11 arranged opposite each other in a first direction and two second straight edges 12 arranged opposite each other in a second direction. The second direction is perpendicular to the first direction. The first straight edges 11 and the second straight edges 12 are connected by a connecting edge. The distance between each of the first straight edges 11 and the second straight edges 12 and the axis of the stator core 100 is less than the maximum distance between the connecting edge and the axis of the stator core.

[0039] In other words, the outer contour of the stator yoke 10 defines a rectangular structure, and the minimum distance between the axis of the stator core 100 and the outer contour of the stator yoke 10 is the distance between the axis of the stator core 100 and the first straight side 11 and / or the second straight side 12.

[0040] The stator yoke 10 has a near-rectangular structure, which facilitates more efficient use of space, especially in compact motor designs, helping to reduce the overall size of the motor. It also makes the stator yoke 10 more stable under electromagnetic and mechanical stresses, improving overall mechanical strength.

[0041] Meanwhile, by integrating multiple stator teeth 20 together using the stator yoke 10, the stator yoke 10 and stator teeth 20 become a single structure, enabling an integrated design of the electromagnetic structure and the mounting structure, which facilitates the reduction of the number of parts and improves the reliability and cost-effectiveness of the system.

[0042] The number of stator teeth 20 is Q. In the axial section of the stator core 100, the distance between the axis of the stator core 100 and the outline of the end of the stator teeth 20 away from the stator yoke 10 is L1. The maximum distance between the axis of the stator core 100 and the connecting edge is L2. Q, L1, and L2 satisfy the following conditions: The units for L1 and L2 are mm, and Q > 10.

[0043] Specifically, Q represents the number of stator teeth 20. A number greater than 10 stator teeth 20 improves space utilization and motor efficiency. The stator windings are wound on the stator teeth 20; therefore, a number greater than 10 stator teeth 20 results in high utilization of the stator core 100, which is beneficial for improving motor efficiency. Conversely, a small number of stator teeth 20 (Q) is detrimental to improving motor efficiency, and a small number of stator teeth 20, when arranged in the stator yoke 10, leads to low space utilization. The number of stator teeth 20 can be 12 or 15, etc., without further restrictions.

[0044] By controlling the values ​​of Q, L1, and L2, when the stator core 100 is used in a motor, the motor can achieve a higher torque density. This allows the motor to have a better copper-iron loss ratio, thereby enabling the motor to have higher efficiency.

[0045] As shown in Table (a) and Figure 2 As shown, K1 is The relationship between the size and motor efficiency.

[0046] exist As the value increases from 3.6 to 6.0, the motor efficiency gradually increases. When the value is greater than 6.0, the motor efficiency begins to decrease, therefore... It enables the motor to have high efficiency.

[0047] As shown in Table (a) and Figure 2 As shown, K2 is The relationship between the size of K3 and the copper loss of the motor, where K3 is... The relationship between the size of the motor and the iron loss of the motor.

[0048] when As the value gradually increases from 3.6, the copper loss of the motor gradually increases. When the value is 3.6, the iron loss of the motor is relatively large. When the value is greater than 4.2, the iron loss of the motor shows a gradually decreasing trend, therefore... The motor has a better copper-iron loss ratio.

[0049] (Q×L1) / L2 Copper loss (W) Iron loss (W) efficiency(%) 3.6 52 82 93.7 4.2 55 73 94.1 4.8 59 64 94.4 5.4 64 58 94.5 6.0 72 55 94.3 6.6 86 52 93.8 7.2 110 50 93.0

[0050] Table (a)

[0051] Furthermore, by controlling the values ​​of Q, L1, and L2, When the stator core 100 is used in a motor, it enables the motor to have a high torque density. This allows for a reduction in the axial thickness of the stator core 100 while maintaining the same torque density (i.e., the motor's rated torque). This, in turn, facilitates a reduction in the overall size of the motor, improving its compactness, efficiency, and performance, thus meeting the growing demand for miniaturized and high-efficiency motors. When this motor is used in refrigeration equipment, it provides the refrigeration equipment with a high cost-performance ratio.

[0052] According to an embodiment of the present invention, the stator core 100, by controlling the values ​​of Q, L1, and L2, enables... This allows the motor to have a better copper-iron loss ratio, thereby increasing the motor's efficiency and making it easier to reduce the motor's cost.

[0053] The stator core 100 according to a specific embodiment of the present invention is described below with reference to the accompanying drawings.

[0054] In some specific embodiments of the present invention, such as Figure 1 As shown, the stator core 100 includes a stator yoke 10 and a plurality of stator teeth 20.

[0055] In some embodiments, the number of stator teeth 20 is 12, L1 = 30.5 mm, L2 = 66.623 mm. By controlling the values ​​of L1 and L2, the dimensions of the stator yoke 10 and the stator tooth 20 can be controlled, thus enabling... This ensures that a suitable number of stator teeth 20 are evenly distributed on the inner side of the stator yoke 10. When the stator core 100 is used in a motor, the motor can simultaneously have a better copper-iron loss ratio, thereby enabling the motor to have higher efficiency.

[0056] In some embodiments, the first direction may be the width direction of the rectangle, and the second direction may be the height direction of the rectangle. Therefore, the first straight edge 11 of the outer contour of the stator yoke 10, which is disposed opposite to the first direction, defines the maximum dimension of the stator yoke 10 in the width direction, and the second straight edge 12 of the outer contour of the stator yoke 10, which is disposed opposite to the second direction, defines the maximum dimension of the stator yoke 10 in the height direction.

[0057] In some embodiments of the present invention, such as Figure 1 , Figure 3 As shown, in the axial section of the stator core 100, the minimum distance between the first straight side 11 and the second straight side 12 and the axis of the stator core 100 is L3, and the units of L1 and L2 are mm, and the following conditions are satisfied: By controlling the sizes of L1 and L3, the dimensional relationship between the stator yoke 10 and the stator tooth 20 can be controlled.

[0058] As shown in Table (b) and Figure 3 As shown, V1 is The relationship between the size and motor efficiency.

[0059] exist As the value increases from 0.52 to 0.58, the motor efficiency gradually increases. When the value is greater than 0.58, the motor efficiency begins to decrease. Therefore, values ​​are taken from both ends of 0.58. It enables the motor to have high efficiency.

[0060] As shown in Table (b) and Figure 3 As shown, V2 is The relationship between the size and the copper loss of the motor, V3 is The relationship between the size of the motor and the iron loss of the motor.

[0061] when As the value gradually increases from 0.52, the copper loss of the motor gradually increases. When the value is greater than 0.52, the iron loss of the motor shows a gradually decreasing trend, therefore... At the same time, the motor also has a better copper-iron loss ratio.

[0062]

[0063]

[0064] Table (b)

[0065] Furthermore, when designing the dimensions of the stator yoke 10 and the stator teeth 20, since the sizes of L2 and L3 are both related to the dimensions of the stator yoke 10, therefore, when making... At the same time, it can also control the size of L2 to make When the stator core 100 is used in a motor, the motor has a high torque density, which enables the motor to have low copper and iron losses at the same time, thus improving the efficiency of the motor.

[0066] Specifically, It can be 0.57, 0.58, or 0.59, etc., which will not be elaborated on here.

[0067] In some embodiments, L1 = 30.5 mm, L3 = 52.5 mm.

[0068] In some embodiments of the present invention, in the axial section of the stator core 100, the minimum distance between the first straight side 11 and the second straight side 12 and the axis of the stator core 100 is L3, wherein... By controlling the sizes of L2 and L3, the dimensional relationship between the stator yoke 10 and the stator tooth 20 can be controlled, so that when the stator core 100 is used in a motor, it has lower cost and higher efficiency.

[0069] like Figure 4 As shown in Table (c), G1 is The relationship between the size and motor efficiency.

[0070] exist As the value increases from 1.0 to 1.4, the efficiency of the motor gradually increases. As the efficiency increases from 1.4 to 1.6, the motor efficiency tends to stabilize. The motor has high efficiency.

[0071] like Figure 4 As shown in Table (c), G2 is The relationship between size and motor cost.

[0072] when From 1.0 to 1.3, the cost of the motor tends to stabilize. Between 1.3 and 1.6, the cost of the motor gradually increases, thus... This allows for lower costs for motors.

[0073] L2 / L3 Cost (RMB) efficiency(%) 1.0 40 93.5 1.1 40 94.0 1.2 40 94.3 1.3 40 94.5 1.4 41 94.6 1.5 43 94.6 1.6 46 94.6

[0074] Table (c)

[0075] Furthermore, when designing the dimensions of the stator yoke 10 and the stator teeth 20, since the stator teeth 20 are located on the inner circumferential surface of the stator yoke 10, the size of L1 is related to the sizes of L2 and L3. Therefore, when making... At the same time, it can also control the size of L1 to make When the stator core 100 is used in a motor, it enables the motor to have a better copper-iron loss ratio, thereby making the motor more efficient.

[0076] Specifically, It can be 1.25, 1.3, or 1.35; I won't go into too much detail here.

[0077] In some embodiments, L2 = 66.623 mm, L3 = 52.5 mm.

[0078] In some embodiments of the present invention, such as Figure 5As shown, the connecting edge 13 includes a first connecting straight edge 131, a second connecting straight edge 132, and a connecting arc edge 13. The first connecting straight edge 131 is arranged parallel to the first straight edge 11. In the first direction, the vertical distance from the axis 101 of the stator core 100 to the first connecting straight edge 131 is less than the vertical distance from the axis 101 of the stator core 100 to the first straight edge 11.

[0079] The second connecting straight edge 132 is arranged parallel to the second straight edge 12. In the second direction, the vertical distance from the axis 101 of the stator core 100 to the second connecting straight edge 132 is less than the vertical distance from the axis 101 of the stator core 100 to the second straight edge 12.

[0080] Specifically, in the first direction, the first connecting straight edge 131 is located inside the first straight edge 11, thereby providing notches at opposite ends of the first straight edge 11, which reduces the area of ​​the stator yoke 10 or the area enclosed by the outer contour of the stator yoke 10. In the second direction, the second connecting straight edge 132 is located inside the second straight edge 12, thereby providing notches at opposite ends of the second straight edge 12, which also reduces the area of ​​the stator yoke 10 or the area enclosed by the outer contour of the stator yoke 10. Furthermore, the fact that the first connecting straight edge 131 is positioned opposite each other in the first direction and the second connecting straight edge 132 is positioned opposite each other in the second direction facilitates cutting or machining during manufacturing, thus simplifying the manufacturing process.

[0081] One end of the connecting arc edge 133 is connected to one end of the first connecting straight edge 131, and the other end is connected to one end of the second connecting straight edge 132. In the adjacent first straight edge 11 and second straight edge 12, the other end of the first straight edge 11 and the first connecting straight edge 131 are connected by the first transition edge 134, so that the outer contour of the stator yoke 10 extends from the first straight edge 11 to the inside of the axis 101 of the stator core 100 to the first connecting straight edge 131.

[0082] The first transition edge 134 can be an inclined straight line, which facilitates manufacturing, such as cutting or machining. The first transition edge 134 can also be an arc, creating an arc-shaped or smooth transition when connected to two adjacent parallel edges, facilitating transportation and assembly. Alternatively, the first transition edge 134 can comprise both straight and arc segments; for example, the two ends of the first transition edge 134 can be arc segments, and the middle can be a straight segment, with the straight segment connecting to the arc segment.

[0083] The other end of the second straight edge 12 and the second connecting straight edge 132 are connected by the second transition edge 135, so that the outer contour of the stator yoke 10 extends from the second straight edge 12 to the inside of the axis 101 of the stator core 100 to the second connecting straight edge 132.

[0084] The second transition edge 135 can be an inclined straight line, which facilitates manufacturing, such as cutting or machining. The second transition edge 135 can also be an arc, creating an arc-shaped or smooth transition when connected to two adjacent parallel edges, facilitating transportation and assembly. Alternatively, the second transition edge 135 can include both straight and arc segments; for example, the two ends of the second transition edge 135 may be arc segments, and the middle may be a straight segment, with the straight segment connecting to the arc segment.

[0085] L2 is the maximum distance between the axis of the stator core 100 and the connecting arc edge 133.

[0086] In some embodiments of the present invention, the axial dimension of the stator core 100 is H, wherein Q, H, and L1 satisfy the following conditions: By controlling the relationship between H, Q, and L1, when the stator core 100 is used in a motor, the motor has a high torque density and a better copper-iron loss ratio, thereby achieving higher efficiency.

[0087] In some embodiments, By controlling the relationship between H, Q and L1, when the stator core 100 is used in the motor, the motor has a high torque density, and the motor also has a better copper-iron loss ratio, thereby making the motor more efficient.

[0088] like Figure 5 As shown in Table (d), X1 is The relationship between the size and motor efficiency.

[0089] exist As the value increases from 1.6 to 8.8, the efficiency of the motor gradually increases. When the efficiency is increased from 8.8 to 16, the efficiency of the motor tends to stabilize. At that time, the motor has high efficiency, and further, in At that time, the motor has high efficiency.

[0090] like Figure 5 As shown in Table (d), X2 is The relationship between the size of the motor and its power density.

[0091] when From 1.6 to 8.8, the power density of the motor gradually increases; from 8.8 to 16, the power density gradually decreases. Therefore, in At that time, the motor has a high power density, and further, in At that time, the motor has a high power density.

[0092]

[0093] Table (d)

[0094] In some examples, the number of stator teeth 20 is 12, H = 14 mm, L1 = 30.5 mm.

[0095] In some embodiments, 14mm ≤ H ≤ 30mm is used to control the axial dimensions of the stator core 100.

[0096] Specifically, H should be ≤ 14mm to ensure that the stator core 100 has a certain height in the axial direction, thereby ensuring that the motor has sufficient torque when the stator core 100 is used in the motor to guarantee the rated torque of the motor. H should be ≤ 30mm to avoid the stator core 100 being too large in the axial direction, which would affect the miniaturization design of the motor.

[0097] Specifically, the axial dimension of the stator core 100 can be 14mm, 15mm, 17mm, 19mm, 20mm, 22mm, 25mm, 27mm or 30mm, without much restriction.

[0098] In some embodiments of the present invention, in the axial section of the stator core 100, the multiple stator teeth 20 have the same structure and are evenly distributed with the axis of the stator core as the center of symmetry, so as to evenly arrange the multiple stator teeth 20 on the inner side of the stator yoke 10, thereby facilitating the winding of the stator winding on the stator teeth 20.

[0099] In some embodiments of the present invention, the stator core 100 includes a plurality of stator laminations stacked along the axial direction, each stator lamination being an integrally formed part. Compared with an integral stator core 100, this simplifies manufacturing and assembly and improves production efficiency.

[0100] Meanwhile, by adjusting the number of stator laminations and the stacking method, motors of different specifications can be flexibly designed, which has significant advantages in improving motor reliability and economy.

[0101] In some alternative embodiments of the present invention, the stator core 100 includes a plurality of core portions arranged along its axial direction, each core portion being formed by stacking a plurality of stator laminations along the thickness direction of the stator laminations, and each stator slot 30 including a plurality of slot portions arranged along the axial direction of the stator core 100, the plurality of core portions correspondingly defining the plurality of slot portions of the stator slot 30, and in each stator slot 30, the plurality of slot portions have different dimensions.

[0102] The different sizes of the slots allow for optimization of the stator winding, reducing its resistance. This improves the efficiency of the motor when the stator core 100 is used in the motor.

[0103] In some embodiments, each stator lamination includes an annular segmented yoke and segmented teeth, with a segmented groove formed between two adjacent segmented teeth. Multiple segmented yokes are arranged along the axial direction of the stator core 100 to form a stator yoke 10, multiple segmented teeth are arranged along the axial direction of the stator core 100 to form a stator tooth 20, and multiple segmented grooves are arranged along the axial direction of the stator core 100 to form a stator groove 30.

[0104] Each stator lamination includes Q′ segmented teeth. On the axial section of the stator core 100, the distance between the axis of the stator lamination and the contour line of the segmented teeth away from the segmented yoke is L1′, and the maximum distance between the axis of the stator lamination and the outer contour line of the segmented yoke is L2′. Q′, L1′, and L2′ satisfy the following conditions:

[0105] It needs to be explained here that Q, L1, and L2 are constraints on the axial cross-sectional dimensions of the stator core 100, while Q′, Lt1′, and Lt2′ are constraints on the axial cross-sectional dimensions of the stator laminations. Since multiple stator laminations are arranged axially along the stator core 100, therefore...

[0106] In some specific embodiments of the present invention, the number of stator laminations in multiple core sections may be the same or different, and the size of the stator laminations in each core section is the same.

[0107] In some embodiments, the stator laminations in each core section are of the same size, while the stator laminations in different core sections are of different sizes. By using stator laminations of different sizes, it is easier to optimize the stator winding and reduce the resistance of the stator winding. This makes it easier to improve the efficiency of the motor when the stator core 100 is used in the motor.

[0108] It should be noted that although the stator core 100 includes multiple stator laminations of different sizes, each stator lamination meets the following conditions:

[0109] In some alternative embodiments of the present invention, such as Figure 1 As shown, the groove includes a first sidewall 31 and a second sidewall 32 disposed opposite to each other in the circumferential direction of the stator yoke 10.

[0110] On the axial section of the stator core 100, the projected interval of the first sidewall 31 of the two corresponding slots in two adjacent core sections is 0.4mm to 0.8mm, and the projected interval of the second sidewall 32 of the two corresponding slots is 0.4mm to 0.8mm. This facilitates the optimization of the stator winding and reduces the resistance of the stator winding. Therefore, when the stator core 100 is used in a motor, it is easier to improve the efficiency of the motor.

[0111] Specifically, the two slots that are in opposite positions refer to two slots that are adjacent in the axial direction of the stator yoke 10. On the axial section of the stator core 100, the projected interval of the first sidewall 31 on the same side of the two slots is 0.4mm to 0.8mm, and the projected interval of the second sidewall 32 on the same side of the two slots is 0.4mm to 0.8mm.

[0112] The following describes an electric motor according to an embodiment of the present invention. The electric motor according to an embodiment of the present invention includes a rotor assembly 600 and a stator assembly.

[0113] The rotor assembly 600 includes a rotor core 61 and multiple magnetic components 62. The rotor core 61 has multiple magnet slots, and the magnetic components 62 are installed in the magnet slots. The multiple magnetic components 62 are arranged in a spoke pattern along the circumference of the rotor core 61, which facilitates the effective use of space and optimizes the magnetic field distribution, thereby improving the torque output capability of the motor. In addition, the gaps between the spokes can serve as ventilation channels, enhancing the heat dissipation effect of the rotor assembly 600, and also improving structural strength and efficiency.

[0114] The stator assembly is sleeved on the outside of the rotor assembly 600. The stator assembly includes a stator core 100 and stator windings. The stator windings are wound around the stator teeth. The stator core 100 is the stator core 100 according to the above embodiment of the present invention. When the rotor assembly 600 is subjected to a magnetic field, it rotates relative to the stator assembly, so that the motor can output torque.

[0115] According to an embodiment of the motor, by utilizing the stator core 100 of the present invention as described above, the values ​​of Q, L1, and L2 are controlled to... This allows the motor to have a better copper-iron loss ratio, thereby increasing the motor's efficiency and making it easier to reduce the motor's cost.

[0116] Furthermore, by controlling the values ​​of Q, L1, and L2, This allows the motor to have a high torque density. With the torque density remaining constant, i.e., the rated torque of the motor remains constant, it is easier to reduce the axial thickness of the stator core 100, thereby reducing the overall size of the motor and improving its compactness, efficiency, and performance, thus meeting the growing demand for miniaturized and high-efficiency motors.

[0117] In some embodiments, such as Figure 7 As shown, the motor includes a stator assembly and a rotor assembly 600. The stator assembly includes a stator core 100 and a stator winding. The stator winding is wound on the stator teeth 20 of the stator core 100, and at least a portion of the stator winding is located in the stator slots 30. The rotor assembly 600 is located inside the stator teeth 20. The rotor assembly 600 rotates relative to the stator assembly under the action of a magnetic field, so that the motor can output torque.

[0118] Other configurations and operations of the motor according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0119] A compressor according to an embodiment of the present invention is described below. The compressor according to an embodiment of the present invention includes a motor according to the above-described embodiment.

[0120] The compressor according to an embodiment of the present invention includes a motor according to the above embodiment of the present invention, and by controlling the values ​​of Q, L1, and L2, makes... This allows the motor to have a better copper-iron loss ratio, thereby increasing the motor's efficiency and making it easier to reduce the motor's cost.

[0121] Furthermore, by controlling the values ​​of Q, L1, and L2, This allows the motor to have a high torque density. With the torque density remaining constant (i.e., the motor's rated torque remains constant), it facilitates a reduction in the axial thickness of the stator core 100, thereby reducing the overall size of the motor and improving its compactness, efficiency, and performance. This meets the growing demand for miniaturized and high-efficiency motors. It also facilitates the miniaturization of compressor designs.

[0122] Other configurations and operations of the compressor according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0123] The following describes a refrigeration apparatus according to an embodiment of the present invention. The refrigeration apparatus according to an embodiment of the present invention includes a compressor according to the above-described embodiment.

[0124] A refrigeration device according to an embodiment of the present invention includes a compressor according to the above embodiment of the present invention, wherein the values ​​of Q, L1, and L2 are controlled to make... This allows the motor to have a better copper-iron loss ratio, thereby increasing the motor's efficiency and making it easier to reduce the motor's cost.

[0125] Furthermore, by controlling the values ​​of Q, L1, and L2, This allows the motor to have a high torque density. With the torque density remaining constant (i.e., the motor's rated torque remains constant), it facilitates a reduction in the axial thickness of the stator core 100, thereby reducing the overall size of the motor and improving its compactness, efficiency, and performance. This meets the growing demand for miniaturized and high-efficiency motors. Furthermore, this facilitates the miniaturization of refrigeration equipment, improving its cost-effectiveness.

[0126] In some embodiments, the refrigeration device is a refrigerator, and by controlling the sizes of Q, L1, and L2, so that... This is beneficial for improving motor performance. When setting the size of the motor, it is possible to reduce the size of the motor while ensuring the working load, thereby reducing the size of the refrigerator compressor, realizing the miniaturization design of the refrigerator compressor, improving the storage capacity and cost-effectiveness of the refrigerator, and expanding the application scenarios of the refrigerator.

[0127] Other configurations and operations of the refrigeration equipment according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0128] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and 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 of the invention. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, "above" or "below" a second feature may include direct contact between the first and second features, or it may include contact between the first and second features not being in direct contact but through another feature between them.

[0129] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0130] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0131] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0132] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A stator core, characterized in that, include: The stator yoke and a plurality of stator teeth are provided on the inner circumferential surface of the stator yoke and are spaced apart along the circumferential direction of the stator yoke; In the axial section of the stator core, the outer contour of the stator yoke includes two first straight edges arranged opposite each other in a first direction and two second straight edges arranged opposite each other in a second direction. The second direction is perpendicular to the first direction. The first straight edges and the second straight edges are connected by a connecting edge. The distance between each of the first straight edges and the second straight edges and the axis of the stator core is less than the maximum distance between the connecting edge and the axis of the stator core. The number of stator teeth is Q. In the axial section of the stator core, the distance between the axis of the stator core and the contour line of the end of the stator teeth away from the stator yoke is L1. The maximum distance between the axis of the stator core and the connecting edge is L2. Wherein, Q, L1, and L2 satisfy the following conditions: The units for L1 and L2 are mm, and Q >

10.

2. The stator core according to claim 1, characterized in that, In the axial cross-section of the stator core, the minimum distance between the first straight side and the second straight side and the axis of the stator core is L3. Wherein, the units of L1 and L2 are mm, and the following conditions are met:

3. The stator core according to claim 1, characterized in that, In the axial cross-section of the stator core, the minimum distance between the first straight side and the second straight side and the axis of the stator core is L3. Wherein, the units of L2 and L3 are mm, and they satisfy the following conditions:

4. The stator core according to any one of claims 1-3, characterized in that, The connecting edge includes: The first connecting straight edge is arranged parallel to the first straight edge. In the first direction, the vertical distance from the axis of the stator core to the first connecting straight edge is less than the vertical distance from the axis of the stator core to the first straight edge. The second connecting straight edge is arranged parallel to the second straight edge. In the second direction, the vertical distance from the axis of the stator core to the second connecting straight edge is less than the vertical distance from the axis of the stator core to the second straight edge. A connecting arc edge is provided, one end of which is connected to one end of the first connecting straight edge, and the other end of which is connected to one end of the second connecting straight edge. In the adjacent first straight edge and second straight edge, the first straight edge is connected to the other end of the first connecting straight edge by a first transition edge, and the second straight edge is connected to the other end of the second connecting straight edge by a second transition edge. Wherein, L2 is the maximum distance between the axis of the stator core and the connecting arc edge.

5. The stator core according to any one of claims 1-3, characterized in that, The axial dimension of the stator core is H, wherein Q, H, and L1 satisfy the following condition: The units for H and L1 are mm.

6. The stator core according to claim 5, characterized in that, The conditions that Q, H, and L1 satisfy are: Alternatively, 14mm≤H≤30mm.

7. The stator core according to any one of claims 1-3, characterized in that, In the axial section of the stator core, the multiple stator teeth have the same structure and are evenly distributed with the axis of the stator core as the center of symmetry; the stator core includes multiple stator laminations stacked along the axial direction, and each stator lamination is an integrally formed part.

8. An electric motor, characterized in that, include: A rotor assembly, comprising a rotor core and multiple magnetic components, wherein the rotor core is provided with multiple magnet slots, the magnetic components are installed in the magnet slots, and the multiple magnetic components are arranged in a spoke-like manner along the circumference of the rotor core; A stator assembly, which is sleeved on the outside of the rotor assembly, the stator assembly includes a stator core and a stator winding, the stator winding is wound around the stator teeth, and the stator core is a stator core according to any one of claims 1-7.

9. A compressor, characterized in that, Includes the motor as described in claim 8.

10. A refrigeration device, characterized in that, Includes the compressor as described in claim 9.

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