Rotor punching sheet, rotor, motor, compressor and refrigeration equipment

Abstract

The utility model discloses a rotor punching sheet, a rotor, a motor, a compressor and refrigeration equipment, and relates to the technical field of motors, the rotor punching sheet is provided with a rotation center, the rotor punching sheet is provided with a plurality of magnetic steel grooves arranged around the rotation center, an air groove is arranged between two adjacent magnetic steel grooves, the minimum distance between the air grooves and the outer periphery of the rotor punching sheet is d1, and d1 is greater than or equal to 0.35 mm and less than or equal to 0.5 mm; the technical scheme provided by the utility model aims to reduce the armature reaction magnetic field of the motor so as to reduce the iron loss of the motor and improve the operation efficiency of the motor.

Description

Technical Field

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

[0002] The motor includes a rotor and a stator that cooperates with the rotor. In the field of motor technology, the armature reaction magnetic field refers to the magnetic field generated by these coils when current passes through the armature (i.e., the rotating part of the motor with coils wound on it) in a DC motor or an AC motor. This magnetic field caused by the armature current is called the armature magnetic field. The armature magnetic field interacts with the main magnetic field established by the excitation system in the motor (such as the magnetic field generated by the excitation winding or the magnetic field generated by the permanent magnet), thereby changing the total magnetic field distribution in the air gap of the motor. The armature reaction magnetic field will affect the performance of the motor, such as increasing the iron loss of the motor and reducing the operating efficiency of the motor. At present, the armature reaction magnetic field of the motor in the prior art is relatively large. Utility Model Content

[0003] The main purpose of the utility model is to provide a rotor punching sheet, a rotor, a motor, a compressor and a refrigeration device, aiming to reduce the armature reaction magnetic field of the motor, so as to reduce the iron loss of the motor and improve the operation efficiency of the motor.

[0004] To achieve the above-mentioned purpose, the rotor punching proposed in the utility model has a rotation center, and the rotor punching is provided with a plurality of magnetic steel grooves arranged around the rotation center, and an air groove is provided between two adjacent magnetic steel grooves, and the minimum distance from the air groove to the outer periphery of the rotor punching is d1, 0.35mm≤d1≤0.5mm.

[0005] In one embodiment, the minimum distance from the air slot to the adjacent magnetic steel slot is d2, 0.5×d1≤d2≤1.5×d1.

[0006] In one embodiment, the minimum distance from the outer periphery of the rotor punching sheet to the rotation center is D1, the minimum distance from the magnetic steel slot to the rotation center is D2, the difference between the minimum distance from the air slot to the rotation center and D2 is d3, the minimum distance from the air slot to the outer periphery of the rotor punching sheet is d1, (D1-d1-D2)×0.6≤d3≤(D1-d1-D2)×0.9.

[0007] In one embodiment, the magnetic steel slot has a skewed slot section, and two skewed slot sections located in different magnetic steel slots and adjacent to each other in the circumferential direction of the rotor punching are arranged at a first angle, and the first angle is gradually expanded toward the rotation center. The angle of the first angle is A, the area of ​​the air slot is S, and the minimum distance between two adjacent magnetic steel slots is L, 0.25×π×(D1-d1-D2-d3)^2≤S≤L×(D1-d1-D2-d3)+tan(0.5×A)×(D1-d1-D2-d3)^2.

[0008] In one embodiment, the magnetic steel slot is arranged in a V-shape to have two connected inclined slot sections.

[0009] In one embodiment, the magnetic steel slot has a symmetry axis passing through the rotation center;

[0010] and / or, a plurality of said magnetic steel slot arrays are arranged;

[0011] and / or, the air slot has an axis of symmetry passing through the rotation center;

[0012] and / or, a plurality of the air slots are arranged in an array;

[0013] And / or, the air slot is arranged in a circular or trapezoidal shape.

[0014] The utility model also provides a rotor, which includes the above-mentioned rotor punching sheet.

[0015] In one embodiment, the number of poles of the rotor is 6 or 8.

[0016] The utility model also provides a motor, which comprises the above-mentioned rotor.

[0017] The utility model also provides a compressor, which comprises the above-mentioned motor.

[0018] The utility model also provides a refrigeration device, which comprises the above-mentioned compressor.

[0019] The technical solution of the utility model reduces the armature reaction magnetic field of the motor by adopting air slots, so as to reduce the iron loss of the motor and improve the operation efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of an embodiment of a rotor punching provided by the utility model;

[0022] Figure 2 for Figure 1 A partial enlarged view of the H in the middle;

[0023] Figure 3 A schematic structural diagram of another embodiment of the rotor punching provided by the utility model;

[0024] Figure 4 for Figure 3 A partial enlarged view of point I in the middle;

[0025] Figure 5 A schematic structural diagram of another embodiment of the rotor punching provided by the utility model;

[0026] Figure 6 for Figure 5 A partial enlarged view of the J in the middle.

[0027] Description of Figure Numbers:

[0028] 100, rotor punching; 200, magnetic steel slot; 300, chute section; 400, air slot.

[0029] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0033] The utility model provides a rotor punching sheet.

[0034] See also Figures 1 to 6 In one embodiment of the utility model, the rotor sheet 100 has a rotation center. The rotor sheet 100 is provided with a plurality of magnetic steel slots 200 arranged around the rotation center, that is, in the circumferential direction of the rotor sheet 100, the rotor sheet 100 is provided with a plurality of magnetic steel slots 200. The magnetic steel slots 200 are used for installing magnetic steel. An air slot 400 is provided between two adjacent magnetic steel slots 200. In this way, the motor using the rotor sheet 100 provides a magnetic concentration effect through the air slot 400, which reduces the reaction magnetic field of the motor, thereby reducing the iron loss of the motor, improving the operating efficiency of the motor, and reducing energy consumption. In addition, the minimum distance from the air slot 400 to the outer periphery of the rotor sheet 100 is d1, 0.35mm≤d1≤0.5mm. If d1 is small, the size of the part between the air slot 400 and the outer periphery of the rotor sheet 100 is small in the direction of the shortest path from the air slot 400 to the outer periphery of the rotor sheet 100, which makes the part easy to break when the motor is running. If d1 is large, the magnetic steel is prone to magnetic leakage, making the rotor's magnetic concentration and anti-magnetic demagnetization capabilities weaker. Therefore, when 0.35mm≤d1≤0.5mm, even when the motor is running, in the direction of the shortest path from the air slot 400 to the outer periphery of the rotor punching 100, the portion between the air slot 400 and the outer periphery of the rotor punching 100 is not easy to break, and the rotor's magnetic concentration and anti-magnetic demagnetization capabilities are strong.

[0035] Optionally, in some embodiments, the minimum distance from the air slot 400 to the adjacent magnetic steel slot 200 is d2, 0.5×d1≤d2≤1.5×d1. In this way, the value of d2 is limited by d1, so that d1 and d2 are adapted to each other. In this way, the rotor punching 100 has a higher structural strength, reduces the occurrence of the rotor punching 100 breaking when the motor is running, and reduces the iron loss of the motor. Of course, in some alternative embodiments, d2 can also be set independently of d1, which is not limited here.

[0036] Optionally, in some embodiments, the minimum distance from the outer periphery of the rotor punching 100 to the rotation center is D1, the minimum distance from the magnetic steel slot 200 to the rotation center is D2, the difference between the minimum distance from the air slot 400 to the rotation center and D2 is d3, the minimum distance from the air slot 400 to the outer periphery of the rotor punching 100 is d1, (D1-d1-D2)×0.6≤d3≤(D1-d1-D2)×0.9. It can be understood that D1-d1-D2 defines the radial length of the magnetic steel slot 200 in the rotor sheet 100, and d3 is defined to be between 0.6 and 0.9 of the radial length to ensure that the position of the air slot 400 is located adjacent to the outer periphery of the rotor sheet 100. The air slot 400 has a larger magnetic resistance to ensure that the air slot 400 reduces the leakage magnetic flux of the end of the magnetic steel close to the outer periphery of the rotor sheet 100. At the same time, the influence of d1 is proposed to ensure that the position of the air slot 400 is adjacent to the position of the magnetic steel slot 200, thereby improving the anti-demagnetization ability of the magnetic steel at the end, thereby improving the operating efficiency of the motor. Similarly, when the air slot 400 has a portion adjacent to the outer periphery of the rotor sheet 100, the air slot 400 is prevented from being too close to the rotation center of the rotor sheet 100 to ensure the magnetic flux density of the rotor, thereby ensuring the operating efficiency of the motor.

[0037] Optionally, in some embodiments, the magnetic steel slot 200 has a skewed slot section 300, and two skewed slot sections 300 located in different magnetic steel slots 200 and adjacent to each other in the circumferential direction of the rotor punching 100 are arranged at a first angle, and the first angle is gradually expanded toward the rotation center. The angle of the first angle is A, the area of ​​the air slot 400 is S, and the minimum distance between two adjacent magnetic steel slots 200 is L, 0.25×π×(D1-d1-D2-d3)^2≤S≤L×(D1-d1-D2-d3)+tan(0.5×A)×(D1-d1-D2-d3)^2. It can be understood that 0.25×π×(D1-d1-D2-d3)^2 represents the area of ​​a circle with the radial length of the air slot 400 in the rotor punching 100 as its diameter, and L×(D1-d1-D2-d3)+tan(0.5×A)×(D1-d1-D2-d3)^2 represents the area of ​​the air slot 400 which is an isosceles trapezoid. It should be noted that, under the limiting condition of 0.5×d1≤d2≤1.5×d1, the area of ​​the circle formed by the radial length of the air slot 400 in the rotor punching 100 as the diameter is the minimum area that the air slot 400 can achieve; similarly, under the limiting condition of 0.5×d1≤d2≤1.5×d1, the two waist sides of the isosceles trapezoid are respectively parallel to the inclined slot section 300 in the adjacent magnetic steel slot 200. It can be seen that the area of ​​the isosceles trapezoid is the maximum area that the air slot 400 can reach. Therefore, the area of ​​the air slot 400 is limited to be between the above-mentioned circular area and the above-mentioned trapezoidal area, so as to achieve all the shapes that the air slot 400 can form under the limiting condition of 0.5×d1≤d2≤1.5×d1, thereby ensuring the effect of the air slot 400 on reducing magnetic steel magnetic leakage, and at the same time, also ensuring the anti-demagnetization ability of the magnetic steel, thereby improving the efficiency of the motor or compressor. Of course, in some alternative embodiments, when d1 and d2 are independently set, the area of ​​a single air slot 400 may also be smaller than π×(D1-d1-D2-d3)^2.

[0038] As shown in Table 1:

[0039]

[0040]

[0041] It can be seen that the larger the proportion of S, the lower the proportion of armature iron loss.

[0042] As shown in Table 2:

[0043]

[0044] It can be seen that the armature iron loss ratio of the rotor punching 100 of the present invention is smaller than that of the rotor punching 100 with S=0 under the same current.

[0045] There are many structural forms of the magnetic steel slot 200. Optionally, in some embodiments, the magnetic steel slot 200 is arranged in a V-shape to have two connected skewed slot sections 300. In some alternative embodiments, the magnetic steel slot 200 is arranged in a U-shape to have two connected skewed slot sections 300, or the magnetic steel slot 200 is arranged in a W-shape to have two skewed slot sections 300 that are farthest apart in the circumferential direction of the rotor sheet 100.

[0046] Optionally, in some embodiments, the magnetic steel slot 200 has a symmetry axis passing through the rotation center, so that the magnetic field generated by the magnetic steel is distributed more evenly.

[0047] Optionally, in some embodiments, a plurality of magnetic steel slots 200 are arranged in an array, so that the magnetic field generated by the magnetic steel is distributed more evenly.

[0048] Optionally, in some embodiments, the air slot 400 has a symmetry axis passing through the rotation center. In this way, the degree to which the motor reduces iron loss through the air slot 400 is further enhanced, and the operating efficiency of the motor is further improved.

[0049] Optionally, in some embodiments, a plurality of air slots 400 are arranged in an array. In this way, the degree to which the motor reduces iron loss through the air slots 400 is further enhanced, and the operating efficiency of the motor is further improved.

[0050] There are many structural forms of the air slot 400. Optionally, in some embodiments, the air slot 400 is arranged in a circular or trapezoidal shape. In this way, the degree to which the motor reduces iron loss through the air slot 400 is further enhanced, and the operating efficiency of the motor is further improved.

[0051] The utility model also proposes a rotor, which includes the aforementioned rotor punching sheet 100. The specific structure of the rotor punching sheet 100 refers to the above-mentioned embodiment. Since the rotor adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0052] Optionally, in some embodiments, the number of poles of the rotor is 6 or 8. Of course, in some other embodiments, the number of poles of the rotor may be other, which is not limited here.

[0053] The utility model also provides a motor, which includes the aforementioned rotor. The specific structure of the rotor refers to the above-mentioned embodiment. Since the motor adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here. Among them, the motor also includes a stator that cooperates with the rotor.

[0054] The utility model also proposes a compressor, which includes the above-mentioned motor. The specific structure of the motor refers to the above-mentioned embodiment. Since the compressor adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0055] The utility model also proposes a refrigeration device, which includes the above-mentioned compressor. The specific structure of the compressor refers to the above-mentioned embodiment. Since the refrigeration device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here. It is worth mentioning that the refrigeration device can be but not limited to an air conditioner or a refrigerator.

[0056] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A rotor punching, characterized in that: The rotor punching has a rotation center, and is provided with a plurality of magnetic steel slots arranged around the rotation center. An air slot is provided between two adjacent magnetic steel slots, and the minimum distance from the air slot to the outer periphery of the rotor punching is d1, 0.35mm≤d1≤0.5mm.

2. The rotor punching according to claim 1, characterized in that: The minimum distance from the air slot to the adjacent magnetic steel slot is d2, 0.5×d1≤d2≤1.5×d1.

3. The rotor punching according to claim 1, characterized in that: The minimum distance from the outer periphery of the rotor punching sheet to the rotation center is D1, the minimum distance from the magnetic steel slot to the rotation center is D2, the difference between the minimum distance from the air slot to the rotation center and D2 is d3, the minimum distance from the air slot to the outer periphery of the rotor punching sheet is d1, (D1-d1-D2)×0.6≤d3≤(D1-d1-D2)×0.

9.

4. The rotor punching according to claim 3, characterized in that: The magnetic steel slot has a skewed slot section, and two skewed slot sections located in different magnetic steel slots and adjacent to each other in the circumferential direction of the rotor punching are arranged at a first angle, and the first angle is gradually expanded toward the rotation center. The angle of the first angle is A, the area of ​​the air slot is S, and the minimum distance between two adjacent magnetic steel slots is L, 0.25×π×(D1-d1-D2-d3)^2≤S≤L×(D1-d1-D2-d3)+tan(0.5×A)×(D1-d1-D2-d3)^2.

5. The rotor punching according to any one of claims 1 to 4, characterized in that: The magnetic steel slot is arranged in a V shape to have two connected inclined slot sections.

6. The rotor punching according to any one of claims 1 to 4, characterized in that: The magnetic steel slot has a symmetry axis passing through the rotation center; and / or, a plurality of said magnetic steel slot arrays are arranged; and / or, the air slot has an axis of symmetry passing through the rotation center; and / or, a plurality of the air slots are arranged in an array; And / or, the air slot is arranged in a circular or trapezoidal shape.

7. A rotor, characterized in that: Comprising a rotor punching sheet as claimed in any one of claims 1 to 6.

8. The rotor according to claim 7, characterized in that The number of poles of the rotor is 6 or 8.

9. A motor, characterized in that: Comprising a rotor as claimed in claim 7 or 8.

10. A compressor, characterized in that: Comprising the motor as claimed in claim 9.

11. A refrigeration device, characterized in that: Comprising the compressor of claim 10.

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