Stator, motor, compressor and refrigeration equipment

Abstract

The utility model provides a stator, motor, compressor and refrigeration equipment wherein the stator comprises stator teeth and stator yokes, each stator tooth comprises a tooth tip, a tooth tip opening is formed between two adjacent stator teeth, the stator yokes are connected with the stator teeth, the stator yokes are located at the radial outer side of the stator teeth, a stator slot is formed between two adjacent stator teeth and the stator yoke, and the tooth tip opening is communicated with the tooth tip opening. The stator slot comprises a radial inner wall, a radial outer wall and a slot side wall, the tooth tip is located between the radial inner side of the stator tooth and the radial inner wall, and the width of the tooth tip is Hs0. A groove tip angle angle1 is formed between the radial inner wall and the side wall of the tooth tip opening, a fillet Rs is arranged between the radial outer wall and the groove side wall, the distance between the radial inner wall and the radial outer wall is the groove height Hs2, the included angle between the radial inner wall and the groove side wall is angle2, and the radial thickness of the stator yoke is SYoke. The Hs0, the angle1, the Rs, the Hs2, the angle2 and the SYoke meet the following conditions: the angle2 is greater than the angle1, the Hs2 is greater than the SYoke, the SYoke is greater than the Hs0, and the SYoke is greater than the Rs.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to a stator, a motor, a compressor and a refrigeration device. Background Art

[0002] Magnetic field harmonics are generated during the operation of the motor. Magnetic field harmonics will increase the iron loss of the motor during operation, resulting in reduced motor efficiency and affecting the service life of the motor. Utility Model Content

[0003] The utility model aims to solve one of the technical problems existing in the prior art or related technology.

[0004] In view of this, in the first aspect, the utility model proposes a stator, comprising: stator teeth, the stator teeth including tooth tips, a tooth tip opening formed between two adjacent stator teeth; a stator yoke, connected to the stator teeth, the stator yoke is located on the radial outside of the stator teeth, a stator slot is formed between two adjacent stator teeth and the stator yoke, the stator slot comprises a radial inner wall, a radial outer wall and a slot side wall, the tooth tip is located between the radial inner side and the radial inner wall of the stator tooth, the width of the tooth tip is Hs0, a slot tip angle angle1 is formed between the radial inner wall and the side wall of the tooth tip opening, a chamfer Rs is provided between the radial outer wall and the slot side wall, the spacing between the radial inner wall and the radial outer wall is a slot height Hs2, an angle between the radial inner wall and the slot side wall is angle2, and a radial thickness of the stator yoke is SYoke, wherein Hs0, angle1, Rs, Hs2, angle2 and SYoke satisfy, angle2>angle1, Hs2>SYoke, SYoke>Hs0, SYoke>Rs.

[0005] The stator provided by the utility model comprises stator teeth and stator yokes, the number of stator teeth and stator yokes are both multiple, two adjacent stator teeth and stator yokes enclose a stator slot, the tooth tip opening is located on the radial inner side of the stator slot, and the tooth tip opening is connected to the stator slot. The stator has an axis, the side of the stator slot close to the axis is a radial inner wall, the side of the stator slot away from the axis is a radial outer wall, the radial inner wall and the radial outer wall are between the slot side wall, there is an angle between the radial inner wall and the slot side wall, and there is a chamfer between the radial outer wall and the slot side wall. A part of the stator teeth is located between the radial inner wall and the axis, and a part of the stator teeth located between the radial inner wall and the axis is used as the tooth tip.

[0006] When the parameters Hs0, angle1, Rs, Hs2, angle2 and SYoke meet the following conditions: angle2>angle1, Hs2>SYoke, SYoke>Hs0, SYoke>Rs, the oversaturation of the magnetic field at the tooth tip and the stator yoke can be avoided, thereby reducing the magnetic field harmonics and further reducing the iron loss during motor operation, which is beneficial to improving the efficiency of the motor and extending the service life of the motor. Moreover, when the above conditions are met, the above settings can improve the stator mode on the basis of ensuring the stator strength, and avoid the resonant frequency between the stator and the compressor.

[0007] In addition, the stator in the above technical solution provided by the utility model may also have the following additional technical features:

[0008] In some technical solutions, optionally, Hs0, angle1, Rs, Hs2, angle2 and SYoke satisfy, 0.7mm≤Hs0≤1.5mm, 85°≤angle1≤100°, 1mm≤Rs≤2mm, 6.5mm≤Hs2≤10mm, 2.5mm≤SYoke≤5mm, 105°≤angle2≤115°.

[0009] When Hs0, angle1, Rs, Hs2, angle2 and SYoke meet the above ranges, the oversaturation of the magnetic field at the tooth tip and the stator yoke can be avoided, thereby reducing the magnetic field harmonics, and then reducing the iron loss during motor operation, which is beneficial to improving the efficiency of the motor and extending the service life of the motor. Moreover, when the above conditions are met, the above settings can improve the stator mode on the basis of ensuring the stator strength, and avoid the resonant frequency between the stator and the compressor.

[0010] In some technical solutions, optionally, the width of a portion of the stator teeth located between two adjacent stator slots is Tth, the width of the tooth tip opening is C1, and Tth and C1 satisfy that Tth≥C1.

[0011] A portion of the stator tooth is located between two adjacent stator slots, and the width of this portion of the stator tooth is Tth. When Tth and C1 satisfy Tth≥C1 and the tooth magnetic field is not saturated, the slot area is increased to minimize the stator phase current while ensuring optimal motor efficiency, thereby reducing the loss of the motor controller and further improving the system efficiency of the motor, that is, the controller efficiency of the motor.

[0012] In some technical solutions, optionally, the inner diameter of the stator is D1, and D1, Tth and C1 satisfy 50mm≤D1≤58mm, 3.5mm≤Tth≤7mm, and 2mm≤C1≤3.5mm.

[0013] When D1, Tth and C1 satisfy: 50mm≤D1≤58mm, 3.5mm≤Tth≤7mm, 2mm≤C1≤3.5mm, the above settings can ensure stable operation of the motor at low speeds. At the same time, when the tooth magnetic field is not saturated, the slot area is increased. While ensuring the optimal motor efficiency, the stator phase current is minimized, the loss of the motor controller is reduced, and the system efficiency of the motor, that is, the controller efficiency of the motor, is further improved.

[0014] In some technical solutions, optionally, a plurality of mounting holes are provided on the stator, and the mounting holes are used for passing connecting parts, and the plurality of mounting holes are distributed along the length direction and the width direction of the stator; wherein, along the length direction of the stator, the center line of two adjacent mounting holes is L1, and along the width direction of the stator, the center line of two adjacent mounting holes is L2, the length of the stator is L3, and L1, L2 and L3 satisfy 71mm≤L1≤75mm, 58mm≤L2≤64mm, and 80mm≤L3≤90mm.

[0015] The stator is provided with a plurality of mounting holes on its circumference, and the mounting holes are used for connecting parts to pass through, for example, the connecting parts can be screws or rivets, and the connecting parts can fix the stator to the housing of the compressor. The plurality of mounting holes are distributed along the length and width directions of the stator, so that a plurality of fixing points are formed on the circumference of the stator, ensuring uniform force on the stator and improving the installation stability of the stator.

[0016] When L1, L2 and L3 meet the conditions of 71mm≤L1≤75mm, 58mm≤L2≤64mm, 80mm≤L3≤90mm, the setting positions of multiple mounting holes are limited to further improve the installation stability of the stator.

[0017] In a second aspect, the utility model provides a motor, comprising: a rotor; such as the stator in the first aspect, the rotor is located inside the stator.

[0018] In some technical solutions, optionally, the rotor has a first rotor hole and a second rotor hole, the first rotor hole and the second rotor hole are connected, the radius of the second rotor hole is larger than the radius of the first rotor hole, the first rotor hole is used for interference fit with the rotating shaft, and the second rotor hole is used for clearance fit with the rotating shaft.

[0019] The rotor is provided with a first rotor hole and a second rotor hole, and the first rotor hole and the second rotor hole are used for the shaft to pass through. The aperture of the second rotor hole is larger than the aperture of the first rotor hole, and the first rotor hole and the second rotor hole form a countersunk structure. The first rotor hole and the shaft are interference fit, and the second rotor hole and the shaft of the compressor are clearance fit. This arrangement ensures the strength of the rotor and is conducive to the stable operation of the compressor.

[0020] In some technical schemes, optionally, the inner diameter of the stator is D1, the diameter of the first rotor hole is D2, the diameter of the second rotor hole is D3, and the outer diameter of the rotor is D4, wherein D1, D2, D3 and D4 satisfy 10mm≤D2≤16mm, 18mm≤D3≤23mm, and 0.8mm≤D1-D4≤1.4mm.

[0021] The aperture of the second rotor hole is larger than that of the first rotor hole, and the difference between the inner diameter of the stator and the outer diameter of the rotor satisfies 0.8mm≤D1-D4≤1.4mm. This setting ensures the rotor strength and is beneficial to the stable operation of the compressor.

[0022] In some technical schemes, optionally, the motor also includes: an arc-shaped permanent magnet, connected to the rotor, the arc-shaped permanent magnet bends in a direction away from the second rotor hole, the inner arc radius of the arc-shaped permanent magnet is R1, the outer arc radius of the arc-shaped permanent magnet is R2, the difference magth between R1 and R2 is the width of the arc-shaped permanent magnet, the spacing between the arc-shaped permanent magnet and the second rotor hole is RYoke, the spacing between the end of the arc-shaped permanent magnet and the outer edge of the rotor is W1, and the spacing between two adjacent arc-shaped permanent magnets is W2; wherein, magth, RYoke, W1 and W2 satisfy, magth>W1, magth>W2, RYoke>W1, RYoke>W2.

[0023] The permanent magnet is an arc-shaped structure, the opening of the arc-shaped permanent magnet is away from the axis of the rotor, the side of the arc-shaped permanent magnet away from the axis is the inner arc, and the side of the arc-shaped permanent magnet facing the axis is the outer arc. The difference between the inner arc radius and the outer arc radius is the width of the arc-shaped permanent magnet.

[0024] The outer arc is spaced apart from the second rotor hole, thereby forming a spacing RYoke between the outer arc and the second rotor hole. The end of the arc-shaped permanent magnet faces the outer edge of the rotor, and the arc-shaped permanent magnet is spaced apart from the outer edge of the rotor, thereby forming a spacing W1 between the end of the arc-shaped permanent magnet and the outer edge of the rotor. Two adjacent arc-shaped permanent magnets are spaced apart from each other, thereby forming a spacing W2 between the two adjacent arc-shaped permanent magnets.

[0025] When magth, RYoke, W1 and W2 satisfy magth>W1, magth>W2, RYoke>W1, RYoke>W2, the setting of the arc permanent magnet can rationalize the usage of the arc permanent magnet. On the basis of increasing the magnetic field of the motor, the setting of W1 and W2 is beneficial to reduce leakage flux and ensure the rational distribution of the motor magnetic field.

[0026] In some technical solutions, optionally, R1, R2, magth, RYoke, W1 and W2 satisfy, 11mm≤R1≤14mm, 5.6mm≤R2≤7.6mm, 3.4mm≤magth≤8.4mm, 1.5mm≤RYoke≤4mm, 0.35mm≤W1≤0.8mm, 0.35mm≤W2≤0.8mm.

[0027] When R1, R2, magth, RYoke, W1 and W2 meet the above ranges, the setting of the arc permanent magnet can rationalize the usage of the arc permanent magnet. On the basis of increasing the magnetic field of the motor, the setting of W1 and W2 is beneficial to reduce leakage flux and ensure the rational distribution of the motor magnetic field.

[0028] In some technical solutions, optionally, the rotor includes a plurality of rotor punchings, which are stacked and arranged, and the rotor punchings are provided with connecting holes for connecting parts to pass through; the plurality of connecting holes and the plurality of arc-shaped permanent magnets are distributed along the circumference of the rotor.

[0029] A plurality of rotor punchings are stacked to form a rotor, and connection holes are formed on the rotor punchings. Connectors are passed through the connection holes to fix the plurality of rotor punchings to avoid separation of the plurality of rotor punchings. Exemplarily, the connectors may be rivets.

[0030] The plurality of connection holes are distributed along the circumference of the rotor, so that a plurality of fixing points are formed on the rotor punchings, thereby ensuring uniform force on the rotor punchings and improving the connection stability of the plurality of rotor punchings.

[0031] A plurality of arc-shaped permanent magnets are distributed along the circumference of the rotor, so that the magnetic lines of force of the motor are evenly distributed.

[0032] In a third aspect, the utility model provides a compressor, comprising: a motor as in the second aspect.

[0033] In a fourth aspect, the utility model provides a refrigeration device, comprising: a compressor as in the third aspect.

[0034] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0036] Figure 1 A schematic diagram of the structure of a motor in an embodiment of the utility model is shown;

[0037] Figure 2A partial schematic diagram of a stator in an embodiment of the utility model is shown;

[0038] Figure 3 A schematic diagram of the structure of a stator in an embodiment of the utility model is shown;

[0039] Figure 4 A schematic diagram of the structure of the rotor in an embodiment of the utility model is shown;

[0040] Figure 5 A schematic diagram showing the stacking state of multiple rotor punching sheets is shown.

[0041] Reference numerals:

[0042] 100 motor, 110 stator, 111 stator teeth, 112 stator yoke, 113 tooth tip, 114 tooth tip opening, 115 stator slot, 116 radial inner wall, 117 radial outer wall, 118 slot side wall, 119 mounting hole, 120 rotor, 121 first rotor hole, 122 second rotor hole, 123 arc-shaped permanent magnet, 124 rotor punching sheet, 125 connecting hole, 126 rotating shaft. DETAILED DESCRIPTION

[0043] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0045] Refer to the following Figures 1 to 5 The present invention describes a stator, a motor, a compressor and a refrigeration device provided according to some embodiments of the present invention.

[0046] Combination Figure 1 , Figure 2 and Figure 3As shown, in an embodiment of the utility model, a stator 110 is proposed, including: a stator tooth 111 and a stator yoke 112, the stator tooth 111 includes a tooth tip 113, a tooth tip opening 114 is formed between two adjacent stator teeth 111, the stator yoke 112 is connected to the stator tooth 111, the stator yoke 112 is located on the radial outside of the stator tooth 111, a stator slot 115 is formed between two adjacent stator teeth 111 and the stator yoke 112, the stator slot 115 includes a radial inner wall 116, a radial outer wall 117 and a slot side wall 118, the tooth tip 113 is located between the radial inner side of the stator tooth 111 and the radial inner wall 116, and the width of the tooth tip 113 is Hs0. A slot tip angle angle1 is formed between the radial inner wall 116 and the side wall of the tooth tip opening 114, a chamfered angle Rs is formed between the radial outer wall 117 and the slot side wall 118, the spacing between the radial inner wall 116 and the radial outer wall 117 is the slot height Hs2, the angle between the radial inner wall 116 and the slot side wall 118 is angle2, and the radial thickness of the stator yoke 112 is SYoke. Hs0, angle1, Rs, Hs2, angle2 and SYoke satisfy, angle2>angle1, Hs2>SYoke, SYoke>Hs0, SYoke>Rs.

[0047] The stator 110 provided in this embodiment includes stator teeth 111 and stator yokes 112. The number of stator teeth 111 and stator yokes 112 is multiple. Two adjacent stator teeth 111 and stator yokes 112 enclose a stator slot 115. The tooth tip opening 114 is located on the radial inner side of the stator slot 115, and the tooth tip opening 114 is connected to the stator slot 115. The stator 110 has an axis, and the side of the stator slot 115 close to the axis is a radial inner wall 116, and the side of the stator slot 115 away from the axis is a radial outer wall 117. The slot side wall 118 is between the radial inner wall 116 and the radial outer wall 117, and there is an angle between the radial inner wall 116 and the slot side wall 118, and there is a rounded corner between the radial outer wall 117 and the slot side wall 118. A portion of the stator tooth 111 is located between the radial inner wall 116 and the axis, and the portion of the stator tooth 111 located between the radial inner wall 116 and the axis serves as a tooth tip 113 .

[0048] When the parameters Hs0, angle1, Rs, Hs2, angle2 and SYoke satisfy: angle2>angle1, Hs2>SYoke, SYoke>Hs0, SYoke>Rs, the tooth tip 113 and the stator yoke 112 can avoid the magnetic field oversaturation, thereby reducing the magnetic field harmonics, and then reducing the iron loss during the operation of the motor 100, which is beneficial to improving the efficiency of the motor 100 and extending the service life of the motor 100. Moreover, when the above conditions are met, the above settings can improve the modal state of the stator 110 on the basis of ensuring the strength of the stator 110, and avoid the stator 110 and the compressor The whole machine generates a resonant frequency.

[0049] Combination Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, optionally, Hs0, angle1, Rs, Hs2, angle2 and SYoke satisfy, 0.7mm≤Hs0≤1.5mm, 85°≤angle1≤100°, 1mm≤Rs≤2mm, 6.5mm≤Hs2≤10mm, 2.5mm≤SYoke≤5mm, 105°≤angle2≤115°.

[0050] When Hs0, angle1, Rs, Hs2, angle2 and SYoke meet the above ranges, the tooth tip 113 and the stator yoke 112 can avoid the magnetic field oversaturation, thereby reducing the magnetic field harmonics, and then reducing the iron loss during the operation of the motor 100, which is beneficial to improving the efficiency of the motor 100 and extending the service life of the motor 100. Moreover, when the above conditions are met, the above settings can improve the modal state of the stator 110 on the basis of ensuring the strength of the stator 110, and avoid the stator 110 and the compressor The whole machine generates a resonant frequency.

[0051] Combination Figure 1 and Figure 3 As shown, in some embodiments, optionally, the width of a portion of the stator tooth 111 located between two adjacent stator slots 115 is Tth, the width of the tooth tip opening 114 is C1, and Tth and C1 satisfy Tth≥C1.

[0052] A portion of the stator tooth 111 is located between two adjacent stator slots 115, and the width of this portion of the stator tooth 111 is Tth. When Tth and C1 satisfy Tth≥C1 and the tooth magnetic field is not saturated, the slot area is increased. While ensuring the optimal efficiency of the motor 100, the phase current of the stator 110 is minimized, reducing the loss of the motor 100 controller, and further improving the system efficiency of the motor 100, that is, the controller efficiency of the motor 100.

[0053] Combination Figure 1 and Figure 3 As shown, in some embodiments, optionally, the inner diameter of the stator 110 is D1, and D1, Tth and C1 satisfy 50 mm≤D1≤58 mm, 3.5 mm≤Tth≤7 mm, and 2 mm≤C1≤3.5 mm.

[0054] When D1, Tth and C1 satisfy: 50mm≤D1≤58mm, 3.5mm≤Tth≤7mm, 2mm≤C1≤3.5mm, the above settings can ensure that the motor 100 runs stably at low speeds. At the same time, when the tooth magnetic field is not saturated, the slot area is increased. While ensuring the optimal efficiency of the motor 100, the phase current of the stator 110 is minimized, the loss of the motor 100 controller is reduced, and the system efficiency of the motor 100, that is, the controller efficiency of the motor 100, is further improved.

[0055] Combination Figure 1 and Figure 3 As shown, in some embodiments, optionally, a plurality of mounting holes 119 are provided on the stator 110, and the mounting holes 119 are used for the connection members to pass through, and the plurality of mounting holes 119 are arranged along the length direction of the stator 110 ( Figure 1 The arrow at the middle mark H1 points to the direction of the width ( Figure 1 The arrow at the middle mark H2 points to the distribution). Along the length direction of the stator 110, the center line of two adjacent mounting holes 119 is L1, along the width direction of the stator 110, the center line of two adjacent mounting holes 119 is L2, the length of the stator 110 is L3, and L1, L2 and L3 satisfy 71mm≤L1≤75mm, 58mm≤L2≤64mm, and 80mm≤L3≤90mm.

[0056] A plurality of mounting holes 119 are provided on the circumference of the stator 110. The mounting holes 119 are used for connecting members to pass through. For example, the connecting members may be screws or rivets, and the connecting members can fix the stator 110 to the housing of the compressor. The plurality of mounting holes 119 are distributed along the length and width directions of the stator 110, so that a plurality of fixing points are formed on the circumference of the stator 110, thereby ensuring uniform force on the stator 110 and improving the installation stability of the stator 110.

[0057] When L1, L2 and L3 satisfy 71mm≤L1≤75mm, 58mm≤L2≤64mm, 80mm≤L3≤90mm, the setting positions of the multiple mounting holes 119 are limited to further improve the installation stability of the stator 110.

[0058] like Figure 1As shown, in an embodiment of the present utility model, a motor 100 is proposed, comprising: a rotor 120 and a stator 110 in any of the above embodiments, the rotor 120 is located in the stator 110, and the motor 100 in this embodiment can achieve the technical effects of the stator 110 in any of the above embodiments, which will not be repeated here.

[0059] The motor 100 further includes a rotating shaft 126 , which passes through a rotor hole of the rotor.

[0060] The stator 110 includes stator teeth 111 and stator yokes 112. The number of stator teeth 111 and stator yokes 112 is plural. Two adjacent stator teeth 111 and stator yokes 112 enclose a stator slot 115. The tooth tip opening 114 is located radially inside the stator slot 115, and the tooth tip opening 114 is connected to the stator slot 115. The stator 110 has an axis. The side of the stator slot 115 close to the axis is a radial inner wall 116. The side of the stator slot 115 far from the axis is a radial outer wall 117. The slot side wall 118 is between the radial inner wall 116 and the radial outer wall 117. There is an angle between the radial inner wall 116 and the slot side wall 118. There is a rounded corner between the radial outer wall 117 and the slot side wall 118. A portion of the stator tooth 111 is located between the radial inner wall 116 and the axis, and the portion of the stator tooth 111 located between the radial inner wall 116 and the axis serves as a tooth tip 113 .

[0061] When the parameters Hs0, angle1, Rs, Hs2, angle2 and SYoke satisfy: angle2>angle1, Hs2>SYoke, SYoke>Hs0, SYoke>Rs, the tooth tip 113 and the stator yoke 112 can avoid the magnetic field oversaturation, thereby reducing the magnetic field harmonics, and then reducing the iron loss during the operation of the motor 100, which is beneficial to improving the efficiency of the motor 100 and extending the service life of the motor 100. Moreover, when the above conditions are met, the above settings can improve the modal state of the stator 110 on the basis of ensuring the strength of the stator 110, and avoid the stator 110 and the compressor The whole machine generates a resonant frequency.

[0062] Combination Figure 1 and Figure 4 As shown, in some embodiments, optionally, the rotor 120 has a first rotor hole 121 and a second rotor hole 122, the first rotor hole 121 and the second rotor hole 122 are connected, the radius of the second rotor hole 122 is larger than the radius of the first rotor hole 121, the first rotor hole 121 is used for interference fit with the rotating shaft 126, and the second rotor hole 122 is used for clearance fit with the rotating shaft 126.

[0063] The rotor 120 is provided with a first rotor hole 121 and a second rotor hole 122, which are used for the rotation shaft 126 of the compressor (the rotation shaft 126 can be the rotation shaft structure of the motor itself, or the rotation shaft 123 can also be the crankshaft of the compressor) to pass through. The aperture of the second rotor hole 122 is larger than the aperture of the first rotor hole 121, and the first rotor hole 121 and the second rotor hole 122 form a countersunk structure. The first rotor hole 121 and the rotation shaft 126 are interference fit, and the second rotor hole 122 and the rotation shaft 126 are clearance fit. This arrangement ensures the strength of the rotor 120 and is conducive to the stable operation of the compressor.

[0064] Combination Figure 1 and Figure 4 As shown, in some embodiments, optionally, the inner diameter of the stator 110 is D1, the diameter of the first rotor hole 121 is D2, the diameter of the second rotor hole 122 is D3, the outer diameter of the rotor 120 is D4, and D1, D2, D3 and D4 satisfy 10mm≤D2≤16mm, 18mm≤D3≤23mm, and 0.8mm≤D1-D4≤1.4mm.

[0065] The aperture of the second rotor hole 122 is larger than that of the first rotor hole 121, and the difference between the inner diameter of the stator 110 and the outer diameter of the rotor 120 satisfies 0.8mm≤D1-D4≤1.4mm. This setting ensures the strength of the rotor 120 and is conducive to the stable operation of the compressor.

[0066] Combination Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments, optionally, the motor 100 further includes: an arc-shaped permanent magnet 123, the arc-shaped permanent magnet 123 is connected to the rotor 120, the arc-shaped permanent magnet 123 is bent in the direction away from the second rotor hole 122, the inner arc radius of the arc-shaped permanent magnet 123 is R1, the outer arc radius of the arc-shaped permanent magnet 123 is R2, the difference magth between R1 and R2 is the width of the arc-shaped permanent magnet 123, the distance between the arc-shaped permanent magnet 123 and the second rotor hole 122 is RYoke, the distance between the end of the arc-shaped permanent magnet 123 and the outer edge of the rotor 120 is W1, and the distance between two adjacent arc-shaped permanent magnets 123 is W2. magth, RYoke, W1 and W2 satisfy, magth>W1, magth>W2, RYoke>W1, RYoke>W2.

[0067] The permanent magnet is an arc-shaped structure, the opening of the arc-shaped permanent magnet 123 is away from the axis of the rotor 120, the side of the arc-shaped permanent magnet 123 away from the axis is the inner arc, and the side of the arc-shaped permanent magnet 123 facing the axis is the outer arc. The difference between the inner arc radius and the outer arc radius is the width of the arc-shaped permanent magnet 123.

[0068] The outer arc is spaced apart from the second rotor hole 122, thereby forming a spacing RYoke between the outer arc and the second rotor hole 122; the end of the arc-shaped permanent magnet 123 faces the outer edge of the rotor 120, and the arc-shaped permanent magnet 123 is spaced apart from the outer edge of the rotor 120, thereby forming a spacing W1 between the end of the arc-shaped permanent magnet 123 and the outer edge of the rotor 120; two adjacent arc-shaped permanent magnets 123 are spaced apart from each other, thereby forming a spacing W2 between the two adjacent arc-shaped permanent magnets 123.

[0069] When magth, RYoke, W1 and W2 satisfy magth>W1, magth>W2, RYoke>W1, RYoke>W2, the setting of the arc permanent magnet 123 can rationalize the usage of the arc permanent magnet 123. On the basis of increasing the magnetic field of the motor 100, the setting of W1 and W2 is beneficial to reduce leakage flux and ensure the rational distribution of the magnetic field of the motor 100.

[0070] Combination Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments, optionally, R1, R2, magth, RYoke, W1 and W2 satisfy, 11mm≤R1≤14mm, 5.6mm≤R2≤7.6mm, 3.4mm≤magth≤8.4mm, 1.5mm≤RYoke≤4mm, 0.35mm≤W1≤0.8mm, 0.35mm≤W2≤0.8mm.

[0071] When R1, R2, magth, RYoke, W1 and W2 meet the above ranges, the setting of the arc-shaped permanent magnet 123 can rationalize the usage of the arc-shaped permanent magnet 123. On the basis of increasing the magnetic field of the motor 100, the setting of W1 and W2 is beneficial to reduce leakage flux and ensure the rational distribution of the magnetic field of the motor 100.

[0072] A multi-objective parameter analysis is carried out with the width Hs0 of the tooth tip 113, the slot tip angle angle1, the width Tth of the stator tooth 111, the distance RYoke between the arc-shaped permanent magnet 123 and the second rotor hole 122, the inner diameter D1 of the stator 110, the inner arc radius R1 of the arc-shaped permanent magnet 123, and the outer arc radius R2 of the arc-shaped permanent magnet 123 as variables. The optimization goal is to minimize the phase current of the stator 110 and maximize the main body efficiency. When the same electromagnetic torque is output, the phase current of the stator 110 is minimized and the motor main body efficiency is optimal.

[0073] Combination Figure 1 and Figure 5As shown, in some embodiments, optionally, the rotor 120 includes a plurality of rotor punchings 124, which are stacked and arranged, and the rotor punchings 124 are provided with connecting holes 125, and the connecting holes 125 are used for connecting parts to pass through; the plurality of connecting holes 125 and the plurality of arc-shaped permanent magnets 123 are distributed along the circumference of the rotor 120.

[0074] A plurality of rotor punchings 124 are stacked to form the rotor 120 , and a connecting hole 125 is formed on the rotor punching 124 . A connecting piece is passed through the connecting hole 125 to fix the plurality of rotor punchings 124 to prevent the plurality of rotor punchings 124 from being separated. Exemplarily, the connecting piece may be a rivet.

[0075] The plurality of connection holes 125 are distributed along the circumference of the rotor 120 , so that a plurality of fixing points are formed on the rotor punchings 124 , thereby ensuring uniform force on the rotor punchings 124 and improving the connection stability of the plurality of rotor punchings 124 .

[0076] The plurality of arc-shaped permanent magnets 123 are distributed along the circumference of the rotor 120 , so that the magnetic lines of force of the motor 100 are evenly distributed.

[0077] In an embodiment of the present utility model, a compressor is proposed, comprising: a motor 100 as in the above embodiment, and can achieve the same technical effect, which will not be described in detail here.

[0078] In an embodiment of the present utility model, a refrigeration device is proposed, including: a compressor as in the above embodiment, and can achieve the same technical effect, which will not be described in detail here.

[0079] Illustratively, the refrigeration device may be a refrigerator or a freezer.

[0080] In the present invention, the term "plurality" means two or more than two, unless otherwise clearly defined. The terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0081] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0082] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A stator, characterized in that: include: Stator teeth, each stator tooth comprising a tooth tip, and a tooth tip opening is formed between two adjacent stator teeth; A stator yoke is connected to the stator teeth and is located on the radial outside of the stator teeth. A stator slot is formed between two adjacent stator teeth and the stator yoke. The stator slot includes a radial inner wall, a radial outer wall and a slot side wall. The tooth tip is located between the radial inner side of the stator tooth and the radial inner wall. The width of the tooth tip is Hs0. A slot tip angle angle1 is formed between the radial inner wall and the side wall of the tooth tip opening. A chamfered corner Rs is formed between the radial outer wall and the slot side wall. The spacing between the radial inner wall and the radial outer wall is a slot height Hs2. The angle between the radial inner wall and the slot side wall is angle2. The radial thickness of the stator yoke is SYoke. Among them, Hs0, angle1, Rs, Hs2, angle2 and SYoke satisfy angle2>angle1, Hs2>SYoke, SYoke>Hs0, SYoke>Rs.

2. The stator according to claim 1, characterized in that: 0.7mm≤Hs0≤1.5mm, 85°≤angle1≤100°, 1mm≤Rs≤2mm, 6.5mm≤Hs2≤10mm, 2.5mm≤SYoke≤5mm, 105°≤angle2≤115°.

3. The stator according to claim 1 or 2, characterized in that: The width of the portion of the stator tooth located between two adjacent stator slots is Tth, the width of the tooth tip opening is C1, and Tth and C1 satisfy Tth≥C1.

4. The stator according to claim 3, characterized in that: The inner diameter of the stator is D1, and D1, Tth and C1 satisfy 50mm≤D1≤58mm, 3.5mm≤Tth≤7mm, and 2mm≤C1≤3.5mm.

5. The stator according to claim 1 or 2, characterized in that: The stator is provided with a plurality of mounting holes, the mounting holes are used for connecting members to pass through, and the plurality of mounting holes are distributed along the length direction and the width direction of the stator; Among them, along the length direction of the stator, the center line connecting two adjacent mounting holes is L1, along the width direction of the stator, the center line connecting two adjacent mounting holes is L2, the length of the stator is L3, L1, L2 and L3 satisfy, 71mm≤L1≤75mm, 58mm≤L2≤64mm, 80mm≤L3≤90mm.

6. A motor, characterized in that: include: Rotor; The stator according to any one of claims 1 to 5, wherein the rotor is located inside the stator.

7. The motor according to claim 6, characterized in that The rotor has a first rotor hole and a second rotor hole, the first rotor hole and the second rotor hole are connected, the radius of the second rotor hole is larger than the radius of the first rotor hole, the first rotor hole is used for interference fit with the rotating shaft, and the second rotor hole is used for clearance fit with the rotating shaft.

8. The motor according to claim 7, characterized in that The inner diameter of the stator is D1, the diameter of the first rotor hole is D2, the diameter of the second rotor hole is D3, and the outer diameter of the rotor is D4, wherein 10mm≤D2≤16mm, 18mm≤D3≤23mm, and 0.8mm≤D1-D4≤1.4mm.

9. The motor according to claim 8, characterized in that The motor also includes: An arc-shaped permanent magnet is connected to the rotor, the arc-shaped permanent magnet is bent in a direction away from the second rotor hole, the inner arc radius of the arc-shaped permanent magnet is R1, the outer arc radius is R2, the difference magth between R1 and R2 is the width of the arc-shaped permanent magnet, the distance between the arc-shaped permanent magnet and the second rotor hole is RYoke, the distance between the end of the arc-shaped permanent magnet and the outer edge of the rotor is W1, and the distance between two adjacent arc-shaped permanent magnets is W2; Among them, magth, RYoke, W1 and W2 satisfy, magth>W1, magth>W2, RYoke>W1, RYoke>W2.

10. The motor according to claim 9, characterized in that 11mm≤R1≤14mm, 5.6mm≤R2≤7.6mm, 3.4mm≤magth≤8.4mm, 1.5mm≤RYoke≤4mm, 0.35mm≤W1≤0.8mm, 0.35mm≤W2≤0.8mm.

11. The motor according to claim 9 or 10, characterized in that: The rotor comprises a plurality of rotor punchings, the rotor punchings are stacked and arranged, and the rotor punchings are provided with connecting holes, and the connecting holes are used for connecting members to pass through; The plurality of connection holes and the plurality of arc-shaped permanent magnets are distributed along the circumference of the rotor.

12. A compressor, characterized in that: include: A motor as claimed in any one of claims 6 to 11.

13. A refrigeration device, characterized in that: include: The compressor of claim 12.

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