Rotor structure and motor

Abstract

The utility model provides a rotor structure and a motor, the rotor structure comprises a rotor core, the rotor core is provided with a plurality of filling grooves, and the filling grooves are uniformly arranged along the circumferential direction of the rotor core; one filling groove comprises two groups of non-independent filling grooves, the two groups of non-independent filling grooves are symmetrically arranged about the D axis, the two groups of non-independent filling grooves are arranged in a V shape, and the openings of the filling grooves face the outer circumferential edge of the rotor iron core; the group of non-independent filling grooves comprises a first magnetic steel groove, a second magnetic steel groove and a third magnetic steel groove which are communicated in sequence, the first magnetic steel groove is close to the center of the rotor core relative to the second magnetic steel groove, the third magnetic steel groove is close to the outer circumferential edge of the rotor core, and the first magnetic steel groove and the second magnetic steel groove are arranged in a staggered manner. According to the utility model, the technical problem that the cogging torque of the motor is increased because the left and right magnetic steel slot structures of the rotor structure are asymmetric under the same magnetic pole in the prior art can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and particularly relates to a rotor structure and a motor. Background Technique

[0002] A prior art proposed a permanent magnet motor rotor punching sheet with self-skewed poles, including a rotor punching sheet body. The rotor punching sheet body is divided into several pairs of magnetic poles, and the magnetic poles are circumferentially arrayed; weight-reducing holes, connection holes and magnet slots are circumferentially arranged on the rotor punching sheet body, and each magnetic pole is matched with a group of magnet slots; a single group of the magnet slots includes two bevel magnet slots, and the two bevel magnet slots are arranged on both sides of the magnetic pole center line; two adjacent rectangular magnet slots are communicated and arranged in a parallel stepped shape. By arranging the rectangular magnet slots in a parallel stepped shape and inserting magnet blocks of the same size into the magnet slots, the equivalent skewed poles of the rotor can be realized, and the communicated design of the magnet slots can effectively reduce the eddy current loss of the magnet and lower the magnet temperature rise. However, in the above solution, the magnet slot structures on the left and right under the same magnetic pole are asymmetric, which increases the cogging torque of the motor, the back electromotive force harmonic is on the high side, the motor is non-sinusoidal, and the uneven magnetic density affects the motor loss and reduces the efficiency;

[0003] Due to the asymmetric magnet slot structures on the left and right under the same magnetic pole in the rotor structure of the prior art, which leads to technical problems such as an increase in the cogging torque of the motor and a high back electromotive force harmonic, the present utility model studies and designs a rotor structure and a motor. Summary of the Utility Model

[0004] Therefore, the present utility model provides a rotor structure and a motor, which can solve the technical problem that the asymmetric magnet slot structures on the left and right under the same magnetic pole in the rotor structure of the prior art lead to an increase in the cogging torque of the motor.

[0005] To solve the above problems, the present utility model provides a rotor structure, including:

[0006] A rotor core, on which a plurality of filling slots are formed, and the filling slots are evenly arranged along the circumference of the rotor core;

[0007] One of the filling slots includes two groups of non-independent filling slots, the two groups of non-independent filling slots are symmetrically arranged about the D axis, the two groups of non-independent filling slots are arranged in a V shape, and the opening of the filling slot faces the outer circumference of the rotor core;

[0008] One group of the non-independent filling slots includes a first magnet slot, a second magnet slot and a third magnet slot that are sequentially communicated. The first magnet slot is closer to the center of the rotor core than the second magnet slot, the third magnet slot is close to the outer circumference of the rotor core, and the first magnet slot and the second magnet slot are arranged in a staggered manner.

[0009] In some embodiments, two adjacent ones of the first magnet slots are connected and communicated with each other through a second air slot, the width of the second air slot is smaller than the width of the first magnet slot, one end of the third magnet slot facing away from the second magnet slot is communicated with a first air slot, the width of the first air slot is smaller than the width of the third magnet slot, and the cross section of the first air slot is arc-shaped.

[0010] In some embodiments, the length of the first magnet slot is L1, the length of the second magnet slot is L2, and the length of the third magnet slot is L3, which satisfy 0.82 ≤ L2 / L1 ≤ 0.9 and 0.75 ≤ L3 / L2 ≤ 0.82.

[0011] In some embodiments, the width of the third magnet slot is greater than the width of the second magnet slot. Along the length direction of the third magnet slot, the center lines of the third magnet slot and the second magnet slot coincide. The width of the first magnet slot is d, the width of the second magnet slot is d1, which satisfy d = d1 = 1.77 mm to 1.83 mm; the width of the third magnet slot is d2, which satisfies 0.65 ≤ d1 / d2 ≤ 0.75; the dislocation distance between the first magnet slot and the second magnet slot is d3, which satisfies 0.5 ≤ d3 / d ≤ 0.7, and the dislocation distance between the third magnet slot and the second magnet slot is d4, which satisfies 0.45 ≤ d4 / d3 ≤ 0.55.

[0012] In some embodiments, the first magnet slot (1) has a first side away from the center of the rotor core (12). There is an included angle between two adjacent first sides. The distance from the end point positions of two adjacent included angles to the center point of the rotor core (12) is H, which satisfies H = 16.65 mm to 16.70 mm.

[0013] In some embodiments, a first finishing slot is arranged between two groups of the non-independent fillers. The center line of the first finishing slot coincides with the D axis. Second finishing slots and third finishing slots are arranged on both sides of the first finishing slot. The second finishing slots and the third finishing slots on both sides of the first finishing slot are symmetrically arranged about the D axis.

[0014] In some embodiments, a plurality of grooves are arranged on the outer peripheral edge of the rotor core (12). The grooves are located between two adjacent filling slots. The bottom of the groove is q2, the outer peripheral edge of the rotor core (12) is q1, and the distance between q2 and q1 is 0.98 mm to 1.02 mm.

[0015] In some embodiments, two adjacent filling slots respectively form a first magnetic pole and a second magnetic pole, and the included angle between the non-independent filling slot in the first magnetic pole and the non-independent filling slot in the second magnetic pole is 15.65° to 15.75°.

[0016] The present utility model further provides a motor, which includes the aforementioned rotor structure.

[0017] The rotor structure and the motor provided by the present utility model have the following beneficial effects:

[0018] Magnets are assembled in the first magnet slot, the second magnet slot, and the third magnet slot. The non-independent filling slot is composed of multiple sections of air slots. The first magnet slot and the first magnet slot are arranged in a dislocation manner. The first magnet slot is translated upward to make the magnet close to the motor air gap. This design can increase the air gap magnetic density, effectively utilize the magnetic field of the magnet, reduce the magnetic field harmonics of the motor, enhance the starting and running performance, and optimize the motor vibration. Further, the third magnet slot is close to the outer edge of the rotor. The width of the third magnet slot is greater than the widths of the first magnet slot and the second magnet slot. The increase in the volume of the magnet improves the relatively easy demagnetization part at the edge of the rotor, enhances its demagnetization resistance ability, and improves the operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. The drawings in the following description are only exemplary. For those of ordinary skill in the art, other implementation drawings can be obtained according to the provided drawings without creative efforts.

[0020] Figure 1 is a structural schematic diagram of a rotor structure of the present utility model Figure 1 ;

[0021] Figure 2 is a structural schematic diagram of a rotor structure of the present utility model Figure 2 ;

[0022] Figure 3 is a structural schematic diagram of a rotor structure of the present utility model Figure 3 ;

[0023] Figure 4 is a structural schematic diagram of a rotor structure of the present utility model Figure 4 ;

[0024] Figure 5 is an assembly drawing of a rotor structure of the present utility model;

[0025] Figure 6 is a comparison diagram of the motor efficiency between the motor of the present utility model and the motor of the prior art;

[0026] Figure 7 is a comparison chart of the iron loss of the motor of the present utility model and the motor of the prior art;

[0027] Figure 8 is a comparison chart of the demagnetization of the motor of the present utility model and the motor of the prior art;

[0028] Figure 9 is a schematic structural diagram of the first prior art;

[0029] Figure 10 is a schematic structural diagram of the second prior art;

[0030] Figure 11 is a schematic structural diagram of the third prior art.

[0031] The reference signs are as follows:

[0032] 1. First magnet slot; 2. Second magnet slot; 3. Third magnet slot; 4. Groove; 5. First finishing slot; 6. Second finishing slot; 7. Third finishing slot; 8. First magnetic pole; 9. Second magnetic pole; 10. First air slot; 11. Second air slot; 12. Rotor core; 13. Stator core; 14. First side. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and in no way restrictive of the present utility model and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0034] In the description of the present utility model, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" usually indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present utility model; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0035] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper", etc. can be used here to describe the spatial positional relationship of a device or feature shown in the figure with other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figure for the device. For example, if the device in the drawing is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations are made for the spatial relative descriptions used here.

[0036] In addition, it should be noted that the use of terms such as "first" and "second" to define components is merely for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meaning, and thus should not be construed as limiting the protection scope of the present utility model.

[0037] Referring to Figures 1-8 As shown, according to an embodiment of the present utility model, a rotor structure is provided, including: a rotor core 12, on which a plurality of filling grooves are formed, and the filling grooves are uniformly arranged along the circumferential direction of the rotor core 12; one of the filling grooves includes two groups of non-independent filling grooves, the two groups of non-independent filling grooves are symmetrically arranged about the D axis, the two groups of non-independent filling grooves are arranged in a V shape, and the opening of the filling groove faces the outer peripheral edge of the rotor core 12; one group of non-independent filling grooves includes a first magnet groove 1, a second magnet groove 2, and a third magnet groove 3 that are sequentially connected, the first magnet groove 1 is closer to the center of the rotor core 12 than the second magnet groove 2, the third magnet groove 3 is closer to the outer peripheral edge of the rotor core 12, and the first magnet groove 1 and the second magnet groove 2 are arranged in a staggered manner. In this technical solution, magnets are assembled in the first magnet groove 1, the second magnet groove 2, and the third magnet groove 3. The non-independent filling groove is composed of multiple sections of air grooves. The first magnet groove 1 and the second magnet groove 2 are arranged in a staggered manner, and the second magnet groove 2 is translated upward to make the magnet closer to the motor air gap. This design can increase the air gap magnetic density, effectively utilize the magnetic field of the magnet, reduce the motor magnetic field harmonics, enhance the starting and running performance, and optimize the motor vibration. Further, the third magnet groove 3 is close to the outer edge of the rotor, the width of the third magnet groove 3 is greater than the widths of the first magnet groove 1 and the second magnet groove 2, and the magnet volume is increased to improve the relatively easily demagnetized part at the rotor edge, so that its demagnetization resistance ability is enhanced and the operation efficiency is improved.

[0038] Referring to Figure 9As shown in the figure, the prior art discloses a motor that can improve the demagnetization resistance of the motor. This design increases the thickness of the permanent magnet in the part that is more likely to be demagnetized and reduces the thickness of the permanent magnet in the part that is less likely to be demagnetized to improve the demagnetization resistance of the motor while reducing the cost of the motor. However, the above solution will increase the harmonic content of the motor and affect the motor efficiency.

[0039] Referring to Figure 10 As shown in the figure, the prior art discloses a rotor punching sheet of a self-skewed pole permanent magnet motor, which includes a rotor punching sheet body. The rotor punching sheet body is divided into several pairs of magnetic poles, and the magnetic poles are circumferentially arrayed; a weight-reducing hole, a connecting hole and a permanent magnet groove are arranged circumferentially on the rotor punching sheet body, and each magnetic pole is matched with a group of permanent magnet grooves; the feature is that: a single group of the permanent magnet grooves includes two bevel permanent magnet grooves, and the two bevel permanent magnet grooves are arranged on both sides of the center line of the magnetic pole; two adjacent rectangular permanent magnet grooves are communicated and arranged in a parallel stepped shape. By arranging the rectangular permanent magnet grooves in a parallel stepped shape and inserting permanent magnet blocks of the same size into the permanent magnet grooves, the rotor equivalent skewed pole can be realized. The communicated design of the permanent magnet grooves can effectively reduce the eddy current loss of the permanent magnet and reduce the temperature rise of the permanent magnet. However, in this solution, the structures of the left and right permanent magnet grooves under the same magnetic pole are asymmetric, which increases the cogging torque of the motor, the back electromotive force harmonics are too high, the motor is non-sinusoidal, and the magnetic density is uneven, affecting the motor loss and reducing the efficiency;

[0040] Referring to Figure 11 As shown in the figure, the prior art discloses a "one"-shaped demagnetization-proof permanent magnet motor rotor structure. The rotor includes a rotor iron core, and a plurality of permanent magnet units are arranged symmetrically around the axis of the rotor iron core. The one-shaped permanent magnet combination is composed of three permanent magnet segments. The permanent magnet segment in the middle is the middle permanent magnet segment, and the other two permanent magnet segments are the end permanent magnet segments, which can effectively suppress the demagnetization of the permanent magnet caused by the armature reaction during overload and improve the overload capacity and overload multiple of the motor. And the coercivity of the middle permanent magnet segment is less than the coercivity of the two end permanent magnet segments. However, in the above solution, the permanent magnets are on the same horizontal line of the permanent magnet groove, and the magnetic circuit vertically adjusts the magnetic force line limitedly.

[0041] In some embodiments, two adjacent first magnet slots 1 are connected and communicated with each other through a second air slot 11. The width of the second air slot 11 is smaller than the width of the first magnet slot 1. One end of the third magnet slot 3 facing away from the second magnet slot 2 is communicated with a first air slot 10. The width of the first air slot 10 is smaller than the width of the third magnet slot 3. The cross-section of the first air slot 10 is arc-shaped. In this technical solution, the first air slot 10 and the second air slot 11 form a magnetic isolation bridge. The width of the first air slot 10 is smaller than the width of the third magnet slot 3, and the width of the second air slot 11 is smaller than the width of the first magnet slot 1, so that the magnets are limited in position, the magnets are fixed to prevent the magnets from swaying. The cross-section of the first air slot 10 is arc-shaped, reducing the magnetic flux resistance, making the magnetic flux in the same direction and reducing the magnetic leakage.

[0042] In some embodiments, the length of the first magnet slot 1 is L1, the length of the second magnet slot 2 is L2, and the length of the third magnet slot 3 is L3, which satisfy 0.82 ≤ L2 / L1 ≤ 0.9 and 0.75 ≤ L3 / L2 ≤ 0.82. In this technical solution, with reference to Figure 2 shown, by 0.82 ≤ L2 / L1 ≤ 0.9 and 0.75 ≤ L3 / L2 ≤ 0.82, the air-gap magnetic density can be optimized to make the air-gap magnetic density distribute as sinusoidally as possible, and at the same time reduce the magnetic field leakage caused by segmentation. According to Figure 2 shown, the magnetic pole center is the D-axis. The non-independent filling slots are symmetric about the D-axis. Among them, the permanent magnet air slot close to the center of the rotor is the first magnet slot 1, the second permanent magnet air slot close to the center of the rotor and parallel to the first magnet slot 1 is the second magnet slot 2, and the third permanent magnet air slot close to the center of the rotor and parallel to the second magnet slot 2 is the third magnet slot 3.

[0043] In some embodiments, the width of the third magnet slot 3 is greater than that of the second magnet slot 2. Along the length direction of the third magnet slot 3, the center lines of the third magnet slot 3 and the second magnet slot 2 coincide. The width of the first magnet slot 1 is d, the width of the second magnet slot 2 is d1, and they satisfy d = d1 = 1.77 mm to 1.83 mm; the width of the third magnet slot 3 is d2, and it satisfies 0.65 ≤ d1 / d2 ≤ 0.75; the misalignment distance between the first magnet slot 1 and the second magnet slot 2 is d3, and it satisfies 0.5 ≤ d3 / d ≤ 0.7. The misalignment distance between the third magnet slot 3 and the second magnet slot 2 is d4, and it satisfies 0.45 ≤ d4 / d3 ≤ 0.55. In this technical solution, magnets are assembled in the third magnet slot 3, the second magnet slot 2, and the first magnet slot 1. The upward translation distance of the second magnet slot 2 forms a misalignment distance d3 with the first magnet slot 1. Along the length direction of the third magnet slot 3, the center lines of the third magnet slot 3 and the second magnet slot 2 coincide. That is to say, the second magnet slot 2 is located in the middle position of the third magnet slot 3. There are distances between both sides of the second magnet slot 2 and both sides of the third magnet slot 3, and the distances on both sides are equal. d = d1 = 1.77 mm to 1.83 mm; the width of the third magnet slot 3 is d2, and it satisfies 0.65 ≤ d2 / d1 ≤ 0.75; the misalignment distance between the first magnet slot 1 and the second magnet slot 2 is d3, and it satisfies 0.5 ≤ d3 / d ≤ 0.7. The misalignment distance between the third magnet slot 3 and the second magnet slot 2 is d4, and it satisfies 0.45 ≤ d4 / d3 ≤ 0.55. It can optimize the air-gap magnetic density and improve the demagnetization resistance ability.

[0044] In some embodiments, the first magnet slot 1 has a first side 14 away from the center of the rotor core 12. There is an included angle between two adjacent first sides 14. The distance from the end point position of the included angle to the center point of the rotor core 12 is H, and it satisfies H = 16.65 mm to 16.70 mm. In this technical solution, with reference to Figure 3 As shown, along the direction radially outward of the rotor, two adjacent first magnet slots 1 are angularly connected on the outer side of the rotor. The two end faces are connected and communicated through a second air slot 11. The second air slot 11 forms a magnetic isolation bridge, which has the function of restricting magnetic leakage of the magnet.

[0045] In some embodiments, a first finishing slot 5 is provided between two groups of the non-independent fills. The center line of the first finishing slot 5 coincides with the D axis. Second finishing slots 6 and third finishing slots 7 are provided on both sides of the first finishing slot 5. The second finishing slots 6 and the third finishing slots 7 on both sides of the first finishing slot 5 are symmetrically arranged about the D axis. In this technical solution, the first finishing slot 5 is arranged along the D axis direction. With reference toFigure 2 As shown, the distance between the first sorting groove 5 and the first magnet groove 1 is 3.65 mm to 3.75 mm, the distance between the second sorting groove 6 and the second magnet groove 2 is 1.78 mm to 1.83 mm, and the distance between the third sorting groove 7 and the third magnet groove 3 is 0.96 mm to 1.03 mm; the distances of the first sorting groove 5, the second sorting groove 6, and the third sorting groove 7 from the outer circumference of the rotor are 0.85 mm to 0.9 mm. Through the first sorting groove 5, the second sorting groove 6, and the third sorting groove 7, the magnetic flux can be sorted and constrained from the root of the magnet, reducing the distortion degree of the magnetic flux during the rotation of the rotor, improving the sinusoidality of the magnetic density, increasing the running stability, and reducing the magnetic leakage, improving the running balance and efficiency, optimizing the back electromotive force harmonics, reducing the magnetic leakage, improving the effectiveness of the magnetic flux, and further improving the operating efficiency of the motor.

[0046] In some embodiments, a plurality of grooves 4 are provided on the outer circumference of the rotor core 12. The grooves 4 are located between two adjacent filling grooves. The bottom of the groove 4 is q2, the outer circumference of the rotor core 12 is q1, and the distance between q2 and q1 is 0.98 mm to 1.02 mm. In this technical solution, referring to Figure 4 As shown, the outer circumference of the rotor core 12 adopts a trimming design. The grooves 4 are arranged along the Q axis direction of the outer circumference of the rotor core 12. The distance between q2 and q1 is 0.98 mm to 1.02 mm, that is, the depth of the groove 4 is 0.98 mm to 1.02 mm. The groove 4 and the outer circumference of the rotor core 12 can be connected by a bevel edge or a curved surface transition connection. q1 is used to limit the depth dimension of q2 to make the depth dimension of q2 reach the best; the groove 4 plays a role in magnetic leakage at the connection of the rotor core 12, causing the magnetic lines of force to flow to the stator side and increasing the output torque. Since the q axis has a greater influence on the peak of the back electromotive force wave of the motor, when there is no trimming or the trimming is too small on the rotor, the uniform air gap will cause "clipping" of the back electromotive force, and too deep trimming will cause the magnetic field in the stator teeth to change violently, resulting in a "steep" potential waveform induced in the stator and increasing the lower-order harmonics of the motor.

[0047] In some embodiments, two adjacent filling grooves respectively form a first magnetic pole 8 and a second magnetic pole 9. The included angle between the non-independent filling groove in the first magnetic pole 8 and the non-independent filling groove in the second magnetic pole 9 is 15.65° to 15.75°. In this technical solution, referring to Figure 4 As shown, the included angle between the non-independent filling groove in the first magnetic pole 8 and the non-independent filling groove in the second magnetic pole 9, and the included angle between the third magnet grooves 3 in two adjacent filling grooves satisfy 15.65° to 15.75°. Through this design, the air gap magnetic density can be optimized and the demagnetization resistance can be improved.

[0048] The present utility model also provides a motor, which includes the above-mentioned rotor structure.

[0049] The motor further includes a stator core 13, and the stator core 13 is sleeved outside the rotor core 12. Referring to Figures 6-8 As shown, the iron loss of the motor of the present utility model is higher than that of the existing motor at each frequency, the copper loss is lower than that of the existing motor while the output torque is the same, and the efficiency of the motor of the present utility model is improved. When passing the same current, the output tangential torque of the motor is the same. The iron loss of the motor of the present utility model is lower than that of the original motor at each frequency, and the output torque and copper loss are the same. The motor of the present utility model has better demagnetization resistance and higher efficiency.

[0050] Due to the pressure of the cost of the magnet, the rotor magnet slots of the compressor motor are usually distributed in a "one" shape or a "V" shape. Since the rotor core is restricted, the "one" - shaped magnet distribution is less. In order to improve the magnetic field effect of the magnet on the rotor, the amount of rotor magnet used is restricted. In the industry, it is usually achieved by increasing the magnet grade; the "V" - shaped magnet distribution is uniform, the amount of magnet used increases, and the magnetic field strength increases, thus the cost also increases; the present utility model designs the d - axis magnets symmetrically and in blocks, increases the thickness at both ends of the magnet near the rotor outer diameter to improve the part of the magnet that is prone to demagnetization, reduces the included angle of the symmetric magnets in the middle, increases the air - gap magnetic density, and cooperates with the design of the magnetic flux sorting slot. At the same time, an outer - circle trimming design is added to the q - axis of the rotor, which can effectively reduce the harmonic content of the motor, reduce the iron loss of the motor, and improve the efficiency of the motor. The motor of the present utility model can improve the efficiency, optimize the air - gap magnetic density of the motor, improve the magnetic density waveform, and also improve the magnet utilization rate and reduce the harmonic content of the motor.

[0051] It is easy for those skilled in the art to understand that, on the premise of no conflict, the advantageous technical features of the above - mentioned various methods can be freely combined and superimposed.

[0052] The above - mentioned are only the preferred embodiments of the present utility model, and are not used to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model. The above - mentioned is only the preferred implementation manner of the present utility model. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present utility model, several improvements and variations can still be made, and these improvements and variations should also be regarded as the protection scope of the present utility model.

Claims

1. A rotor structure, characterized in that: include: A rotor core (12), wherein a plurality of filling grooves are formed on the rotor core (12), and the filling grooves are evenly arranged along the circumference of the rotor core (12); One of the filling slots comprises two groups of non-independent filling slots, the two groups of non-independent filling slots are symmetrically arranged about the D axis, the two groups of non-independent filling slots are arranged in a V shape, and the openings of the filling slots face the outer circumference of the rotor core (12); A group of non-independent filling slots comprises a first magnetic steel slot (1), a second magnetic steel slot (2) and a third magnetic steel slot (3) which are connected in sequence, wherein the first magnetic steel slot (1) is closer to the center of the rotor core (12) relative to the second magnetic steel slot (2), the third magnetic steel slot (3) is closer to the outer circumference of the rotor core (12), and the first magnetic steel slot (1) and the second magnetic steel slot (2) are staggered.

2. The rotor structure according to claim 1, characterized in that: Two adjacent first magnetic steel slots (1) are connected via a second air slot (11), the width of the second air slot (11) is smaller than the width of the first magnetic steel slot (1), one end of the third magnetic steel slot (3) facing away from the second magnetic steel slot (2) is connected to the first air slot (10), the width of the first air slot (10) is smaller than the width of the third magnetic steel slot (3), and the cross section of the first air slot (10) is arc-shaped.

3. The rotor structure according to claim 1, characterized in that: The length of the first magnetic steel slot (1) is L1, the length of the second magnetic steel slot (2) is L2, and the length of the third magnetic steel slot (3) is L3, which satisfies 0.82≤L2 / L1≤0.9 and 0.75≤L3 / L2≤0.

82.

4. The rotor structure according to claim 1, characterized in that: The width of the third magnetic steel slot (3) is greater than the width of the second magnetic steel slot (2). Along the length direction of the third magnetic steel slot (3), the center lines of the third magnetic steel slot (3) and the second magnetic steel slot (2) coincide. The width of the first magnetic steel slot (1) is d, and the width of the second magnetic steel slot (2) is d1, which satisfies that d=d1=1.77mm~1.83mm; the width of the third magnetic steel slot (3) is d2, which satisfies that 0.65≤d1 / d2≤0.75; the offset distance between the first magnetic steel slot (1) and the second magnetic steel slot (2) is d3, which satisfies that 0.5≤d3 / d≤0.7, and the offset distance between the third magnetic steel slot (3) and the second magnetic steel slot (2) is d4, which satisfies that 0.45≤d4 / d3≤0.

55.

5. The rotor structure according to claim 1, characterized in that: The first magnetic steel slot (1) has a first side surface (14) away from the center of the rotor core (12), and an angle is formed between two adjacent first side surfaces (14). The distance between the end point of the angle and the center point of the rotor core (12) is H, which satisfies H = 16.65 mm to 16.70 mm.

6. The rotor structure according to claim 1, characterized in that: A first sorting groove (5) is arranged between the two groups of non-independent filling grooves, the center line of the first sorting groove (5) coincides with the D axis, and a second sorting groove (6) and a third sorting groove (7) are arranged on both sides of the first sorting groove (5), and the second sorting groove (6) and the third sorting groove (7) on both sides of the first sorting groove (5) are arranged symmetrically about the D axis.

7. The rotor structure according to claim 1, characterized in that: A plurality of grooves (4) are provided on the outer circumference of the rotor core (12), the grooves (4) are located between two adjacent filling grooves, the groove bottom of the groove (4) is q2, the outer circumference of the rotor core (12) is q1, and the distance between q2 and q1 is 0.98 mm to 1.02 mm.

8. The rotor structure according to claim 1, characterized in that: Two adjacent filling slots form a first magnetic pole (8) and a second magnetic pole (9), respectively, and an included angle between the non-independent filling slot in the first magnetic pole (8) and the non-independent filling slot in the second magnetic pole (9) is 15.65° to 15.75°.

9. A motor, characterized in that: The invention comprises a rotor structure according to any one of claims 1 to 8.

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