Motor and compressor

Abstract

The utility model discloses a motor and a compressor, the motor comprises a stator, the stator comprises a stator iron core, the outer diameter of the stator iron core is R1, and the inner diameter of the stator iron core is R2; the rotor comprises a rotor iron core, at least one permanent magnet groove is formed in the rotor iron core, the permanent magnet groove extends in the axial direction of the rotor iron core, each permanent magnet groove is suitable for containing at least one permanent magnet, and the number of poles of the rotor is P; wherein the maximum total width of the permanent magnets in each permanent magnet groove in the direction perpendicular to the magnetizing direction is W, and # imgabs0 # is satisfied. According to the motor designed by the utility model, the volume and the cost of the motor can be prevented from being increased while the efficiency of the motor is improved.

Description

Technical Field

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

[0002] In related technologies, the compressor motor is one of the core components of the compressor, and its working efficiency directly affects the efficiency of the compressor. In order to improve the efficiency of the compressor motor, some existing technologies achieve motor efficiency improvement by improving the structure of the motor. This method makes the manufacturing cost of the motor high. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a motor. The motor designed according to the present invention can achieve improved motor efficiency while avoiding increases in motor size and cost.

[0004] The utility model also provides a compressor, comprising the above-mentioned motor.

[0005] According to the utility model, the motor includes: a stator, the stator including a stator core, the stator core having an outer diameter of R1 and an inner diameter of R2; a rotor, the rotor including a rotor core, the rotor core being provided with at least one permanent magnet slot, the permanent magnet slot extending in the axial direction of the rotor core, each of the permanent magnet slots being adapted to accommodate at least one permanent magnet, and the number of rotor poles being P; wherein the maximum total width of the permanent magnet in each permanent magnet slot perpendicular to the magnetization direction is W, and the following conditions are satisfied:

[0006] According to the motor of the present invention, the maximum total width W of the permanent magnets perpendicular to the magnetization direction is adjusted to improve the efficiency of the motor without adding other structures. This can achieve the improvement of the motor efficiency while avoiding increasing the size and cost of the motor.

[0007] According to some embodiments of the present invention, the outer diameter of the rotor core is R3, the maximum total thickness of the permanent magnet in each permanent magnet slot along the magnetization direction is Hm, and the following conditions are satisfied:

[0008] According to some embodiments of the present invention, at least one flow hole is formed on the rotor core and extends through the rotor core in the axial direction. The maximum total area of ​​the flow holes is S1 and satisfies the following conditions:

[0009] According to some embodiments of the present invention, the maximum width of the flow hole in the radial direction is H and satisfies:

[0010]

[0011] According to some embodiments of the present invention, the flow holes are multiple and are spaced apart along the circumference of the rotor core.

[0012] According to some embodiments of the present invention, each of the permanent magnet slots includes a first slot segment, a second slot segment and a third slot segment, the first slot segment is connected to the second slot segment and the extension direction of the first slot segment intersects with the extension direction of the second slot segment, the second slot segment is connected to the third slot segment and the extension direction of the second slot segment intersects with the extension direction of the third slot segment, and the extension direction of the first slot segment intersects with the extension direction of the third slot segment; the permanent magnets in each of the permanent magnet slots include a first permanent magnet, a second permanent magnet and a third permanent magnet, the first permanent magnet is accommodated in the first slot segment, the second permanent magnet is accommodated in the second slot segment, and the third permanent magnet is accommodated in the third slot segment.

[0013] According to some embodiments of the present invention, in a direction perpendicular to the magnetization direction, the width of the first permanent magnet is W1, the width of the second permanent magnet is W2, and the width of the third permanent magnet is W3, satisfying: W=W1+W2+W3, and the width of the first permanent magnet, the width of the second permanent magnet, and the width of the third permanent magnet are the same or different.

[0014] According to some embodiments of the present invention, in the magnetization direction, the thickness of the first permanent magnet is Hm1, the thickness of the second permanent magnet is Hm2, and the thickness of the third permanent magnet is Hm3, satisfying: Hm=Hm1+Hm2+Hm3, and the thickness of the first permanent magnet, the thickness of the second permanent magnet and the thickness of the third permanent magnet are the same or different.

[0015] According to some embodiments of the present invention, the first slot segment and the third slot segment of each permanent magnet slot divide the outer edge of the rotor core into a dominant arc segment and a subordinate arc segment, the maximum radial distance between the second permanent magnet and the subordinate arc segment of the rotor core is d, and the following conditions are satisfied:

[0016] According to some embodiments of the present invention, the permanent magnet slots are configured in plurality and are arranged at intervals along the circumference of the rotor core.

[0017] The following briefly describes a compressor according to another embodiment of the present invention.

[0018] The compressor according to the present invention includes the motor described in any one of the above embodiments. Since the compressor according to the present invention is provided with the motor described in the above embodiments, the compressor has low cost and higher efficiency.

[0019] In summary, the motor according to the present invention can adjust the maximum total width W of the permanent magnets perpendicular to the magnetization direction to improve the motor efficiency while avoiding increasing the size and cost of the motor.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a cross-sectional structural diagram of the stator and rotor according to an embodiment of the present utility model.

[0023] Figure 2 It is a cross-sectional structural diagram of a rotor core according to an embodiment of the present utility model.

[0024] Figure 3 yes Figure 2 A magnified view of the structure at center A.

[0025] Reference numerals:

[0026] 11. Stator core;

[0027] 21, rotor core; 21a, permanent magnet slot; 211a, first slot segment; 212a, second slot segment; 213a, third slot segment; 21b, flow hole;

[0028] 30. Permanent magnet; 31. First permanent magnet; 32. Second permanent magnet; 33. Third permanent magnet;

[0029] 40. Winding. DETAILED DESCRIPTION

[0030] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or mutual communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0035] In related technologies, the compressor motor is one of the core components of the compressor, and its working efficiency directly affects the efficiency of the compressor. In order to improve the efficiency of the compressor motor, some existing technologies achieve motor efficiency improvement by improving the structure of the motor. This method makes the manufacturing cost of the motor high.

[0036] Reference below Figure 1-Figure 3A motor according to an embodiment of the present invention is described.

[0037] like Figure 1-Figure 3 As shown, the motor according to the present invention includes: a stator and a rotor, wherein the stator includes a stator core 11, the stator core 11 has an outer diameter of R1 and an inner diameter of R2; the rotor includes a rotor core 21, the rotor core 21 is provided with at least one permanent magnet slot 21a, the permanent magnet slot 21a extends in the axial direction of the rotor core 21, each permanent magnet slot 21a is suitable for accommodating at least one permanent magnet 30, and the number of rotor poles is P; wherein the maximum total width of the permanent magnet 30 in each permanent magnet slot 21a perpendicular to the magnetization direction is W, and satisfies: Here, a winding 40 is wound on the stator core 11, and R2 / R1 is the split ratio of the motor. The efficiency of the motor can be improved by adjusting the maximum total width W of the permanent magnet 30 perpendicular to the magnetization direction. No other structures need to be added, which can reduce the cost of improving the motor efficiency. The ratio of the maximum total width W of the permanent magnet 30 perpendicular to the magnetization direction to the split ratio R2 / R1 of the motor should not be too large, otherwise it will lead to an increase in the volume and cost of the motor. The ratio of the maximum total width W of the permanent magnet 30 perpendicular to the magnetization direction to the split ratio R2 / R1 of the motor should not be too small, otherwise it will lead to a decrease in the efficiency of the motor. At the same time, the number of poles P of different motors may be different. Therefore, the maximum total width W of the permanent magnet 30 perpendicular to the magnetization direction must meet This can improve the motor's efficiency while avoiding increasing the motor's size and cost.

[0038] According to the motor of the present invention, the maximum total width W of the permanent magnet 30 perpendicular to the magnetization direction is adjusted to improve the efficiency of the motor without adding other structures. This can achieve the improvement of the motor efficiency while avoiding increasing the size and cost of the motor.

[0039] According to some embodiments of the present invention, Figure 1 、 Figure 3 As shown, the outer diameter of the rotor core 21 is R3, the maximum total thickness of the permanent magnet 30 in each permanent magnet slot 21a along the magnetization direction is Hm, and the following conditions are satisfied: Here, in order to ensure the working efficiency of the motor, the thickness of the permanent magnet 30 should not be too small. At the same time, the thickness of the permanent magnet 30 should not be too large. Too large thickness will also increase the cost of the motor. Therefore, the maximum total thickness Hm of the permanent magnet 30 in each permanent magnet slot 21a along the magnetization direction should meet This ensures the working efficiency of the motor while avoiding increasing the cost of the motor.

[0040] In some embodiments, there are multiple permanent magnet slots 21 a , and the thicknesses of the permanent magnets 30 in different permanent magnet slots 21 a along the magnetization direction may be the same or different.

[0041] In some embodiments, there are multiple permanent magnet slots 21 a , and the widths of the permanent magnets 30 in different permanent magnet slots 21 a in a direction perpendicular to the magnetization direction may be the same or different.

[0042] According to some embodiments of the present invention, Figure 2 As shown, the rotor core 21 is formed with at least one flow hole 21b extending through the rotor core 21 in the axial direction. The maximum total area of ​​the flow holes 21b is S1 and satisfies the following conditions: ≤1.5. Specifically, the circulation hole 21b can provide a path for the refrigerant and lubricating oil to pass through, and the maximum total area S1 of the circulation hole 21b should be smaller than the cross-sectional area πR3 of the rotor core 21 in the axial direction. 2 The maximum total area S1 of the flow holes 21b should not be too large, otherwise it will reduce the stiffness of the rotor and worsen the noise. The maximum total area S1 of the flow holes 21b should not be too small, otherwise it will reduce the flow area of ​​the refrigerant and lubricating oil, affecting the operation of the motor and reducing the energy efficiency of the motor. At the same time, since the number of poles P of different motors may be different, the maximum total area S1 of the flow holes 21b must meet To ensure both the rigidity of the rotor and the flow area of ​​the refrigerant.

[0043] Here, the flow holes may be rectangular, circular or other irregular shapes.

[0044] According to some embodiments of the present invention, Figure 2 As shown, the maximum width of the flow hole in the radial direction is H, and it satisfies: It is understandable that the maximum width H of the flow hole in the radial direction should not be too large, as it will also affect the stiffness of the rotor. The maximum width H of the flow hole in the radial direction should not be too small, as it will reduce the flow area of ​​the refrigerant and lubricating oil. Therefore, the maximum width H of the flow hole in the radial direction must meet To ensure both the rigidity of the rotor and the flow area of ​​the refrigerant.

[0045] According to some embodiments of the present invention, Figure 2 As shown, the flow holes 21b are configured in a plurality and spaced apart along the circumference of the rotor core 21 so that the refrigerant and lubricating oil can evenly penetrate the rotor core 21 along the circumference of the rotor core 21. Furthermore, the shapes of the plurality of flow holes 21b can be the same or different.

[0046] According to some embodiments of the present invention, Figure 3As shown, each permanent magnet slot 21a includes a first slot section 211a, a second slot section 212a and a third slot section 213a. The first slot section 211a is connected to the second slot section 212a, and the extension direction of the first slot section 211a intersects with the extension direction of the second slot section 212a. The second slot section 212a is connected to the third slot section 213a, and the extension direction of the second slot section 212a intersects with the extension direction of the third slot section 213a. The extension direction of the first slot section 211a intersects with the extension direction of the third slot section 213a. The permanent magnet 30 in each permanent magnet slot 21a includes a first permanent magnet 31, a second permanent magnet 32 ​​and a third permanent magnet 33. The first permanent magnet 31 is accommodated in the first slot section 211a, the second permanent magnet 32 ​​is accommodated in the second slot section 212a, and the third permanent magnet 33 is accommodated in the third slot section 213a.

[0047] Specifically, the first slot segment 211a, the second slot segment 212a and the third slot segment 213a are connected in sequence, the first permanent magnet 31, the second permanent magnet 32 ​​and the third permanent magnet 33 are arranged at intervals, and the extension directions of the first slot segment 211a, the second slot segment 212a and the third slot segment 213a intersect with each other. The rotor can improve the efficiency of the motor without increasing the manufacturing cost of the motor.

[0048] In some embodiments, a magnetic isolation groove is further provided on one side of the permanent magnet slot 21 a close to the outer edge of the rotor core 21 .

[0049] According to some embodiments of the present invention, Figure 3 As shown, in the direction perpendicular to the magnetization direction, the width of the first permanent magnet 31 is W1, the width of the second permanent magnet 32 ​​is W2, and the width of the third permanent magnet 33 is W3, satisfying: W = W1 + W2 + W3, and the width of the first permanent magnet 31, the width of the second permanent magnet 32, and the width of the third permanent magnet 33 are the same or different. Here, the widths of the multiple permanent magnets 30 arranged in each permanent magnet slot 21a can be the same or different. The total width of the multiple permanent magnets 30 in the direction perpendicular to the magnetization direction is W. When the multiple permanent magnets 30 include at least the first permanent magnet 31, the second permanent magnet 32, and the third permanent magnet 33, they satisfy: This can improve the motor's efficiency while avoiding increasing the motor's size and cost.

[0050] According to some embodiments of the present invention, Figure 3As shown, in the magnetizing direction, the thickness of the first permanent magnet 31 is Hm1, the thickness of the second permanent magnet 32 ​​is Hm2, and the thickness of the third permanent magnet 33 is Hm3, satisfying: Hm=Hm1+Hm2+Hm3, and the thickness of the first permanent magnet 31, the thickness of the second permanent magnet 32, and the thickness of the third permanent magnet 33 are the same or different. Here, the thickness of the multiple permanent magnets 30 arranged in each permanent magnet slot 21a can be the same or different, and the total thickness of the multiple permanent magnets 30 in the magnetizing direction is Hm. When the multiple permanent magnets 30 include at least the first permanent magnet 31, the second permanent magnet 32, and the third permanent magnet 33, satisfying This ensures the working efficiency of the motor while avoiding increasing the cost of the motor.

[0051] According to some embodiments of the present invention, Figure 2 、 Figure 3 As shown, the first slot segment 211a and the third slot segment 213a of each permanent magnet slot 21a divide the outer edge of the rotor core 21 into a dominant arc segment and a sub-arc segment. The maximum radial distance between the second permanent magnet 32 ​​and the sub-arc segment of the rotor core 21 is d, and the following conditions are satisfied: Specifically, the permanent magnet slot 21a is arranged adjacent to the outer edge of the rotor core 21. In some embodiments, the extension direction of the second permanent magnet 32 ​​is orthogonal to the radial direction of the rotor core 21. The maximum radial distance d between the second permanent magnet 32 ​​and the inferior arc segment of the rotor core 21 should not be too small. If it is too small, it will affect the magnetic field and reduce the efficiency of the motor. The maximum radial distance d between the second permanent magnet 32 ​​and the inferior arc segment of the rotor core 21 should not be too large. If it is too large, it will cause magnetization difficulties. Therefore, the maximum radial distance d between the second permanent magnet 32 ​​and the inferior arc segment of the rotor core 21 needs to meet To ensure the magnetization effect of the permanent magnet 30.

[0052] According to some embodiments of the present invention, Figure 1 As shown, the permanent magnet slots 21 a are constructed in plurality and are spaced apart along the circumference of the rotor core 21 to form a uniform magnetic field.

[0053] The following briefly describes the compressor according to the present invention.

[0054] The compressor according to the present invention includes the motor described in any one of the above embodiments. Since the compressor according to the present invention is provided with the motor described in the above embodiments, the compressor has low cost and higher efficiency.

[0055] In summary, the motor according to the present invention can adjust the maximum total width W of the permanent magnet 30 perpendicular to the magnetization direction to improve the motor efficiency while avoiding increasing the size and cost of the motor.

[0056] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean 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 present invention. In this specification, the schematic representations of the above terms do 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. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0057] While embodiments of the present invention have been shown and described above, changes, modifications, substitutions, and variations may be made to the embodiments described above.

Claims

1. A motor, characterized in that: include: The stator comprises a stator core, wherein the outer diameter of the stator core is R1 and the inner diameter is R2; A rotor, the rotor comprising a rotor core, the rotor core being provided with at least one permanent magnet slot, the permanent magnet slot extending in the axial direction of the rotor core, each permanent magnet slot being adapted to accommodate at least one permanent magnet, and the number of rotor poles being P; in The maximum total width of the permanent magnet in each permanent magnet slot perpendicular to the magnetization direction is W, and satisfies:

2. The motor according to claim 1, characterized in that The outer diameter of the rotor core is R3, the maximum total thickness of the permanent magnet in each permanent magnet slot along the magnetization direction is Hm, and the following conditions are satisfied:

3. The motor according to claim 2, characterized in that The rotor core is formed with at least one flow hole extending through the rotor core in the axial direction. The maximum total area of ​​the flow holes is S1 and satisfies the following conditions:

4. The motor according to claim 3, characterized in that The maximum width of the flow hole in the radial direction is H and satisfies:

5. The motor according to claim 3, characterized in that The flow holes are configured in plurality and are arranged at intervals along the circumferential direction of the rotor core.

6. The motor according to claim 2, characterized in that Each of the permanent magnet slots includes a first slot segment, a second slot segment, and a third slot segment, wherein the first slot segment is connected to the second slot segment and an extension direction of the first slot segment intersects with an extension direction of the second slot segment, the second slot segment is connected to the third slot segment and an extension direction of the second slot segment intersects with an extension direction of the third slot segment, and an extension direction of the first slot segment intersects with an extension direction of the third slot segment; The permanent magnets in each permanent magnet slot include a first permanent magnet, a second permanent magnet and a third permanent magnet. The first permanent magnet is accommodated in the first slot section, the second permanent magnet is accommodated in the second slot section, and the third permanent magnet is accommodated in the third slot section.

7. The motor according to claim 6, characterized in that In a direction perpendicular to the magnetization direction, the width of the first permanent magnet is W1, the width of the second permanent magnet is W2, and the width of the third permanent magnet is W3, satisfying: W=W1+W2+W3, and the width of the first permanent magnet, the width of the second permanent magnet, and the width of the third permanent magnet are the same or different.

8. The motor according to claim 6, characterized in that In the magnetization direction, the thickness of the first permanent magnet is Hm1, the thickness of the second permanent magnet is Hm2, and the thickness of the third permanent magnet is Hm3, satisfying: Hm=Hm1+Hm2+Hm3, and the thickness of the first permanent magnet, the thickness of the second permanent magnet and the thickness of the third permanent magnet are the same or different.

9. The motor according to claim 6, characterized in that The first slot segment and the third slot segment of each permanent magnet slot divide the outer edge of the rotor core into a dominant arc segment and a sub-arc segment. The maximum radial distance between the second permanent magnet and the sub-arc segment of the rotor core is d, and the following conditions are satisfied:

10. The motor according to claim 1, characterized in that The permanent magnet slots are configured in plurality and are arranged at intervals along the circumferential direction of the rotor core.

11. A compressor, characterized in that: The method comprises the motor according to any one of claims 1 to 10.

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