Rotor structure, motor structure and compressor

Abstract

The embodiment of the application provides a rotor structure, a motor structure and a compressor, wherein the rotor structure comprises: a rotor core, a plurality of permanent magnet grooves are arranged on the rotor core, and the plurality of permanent magnet grooves are arranged in a circumferential direction of the rotor core; a permanent magnet is arranged in the permanent magnet groove; and a magnetic barrier is arranged on the rotor core, wherein the two ends of the permanent magnet groove are both directed to an outer edge of the rotor core, and the two ends of the magnetic barrier are respectively directed to the permanent magnet and the outer edge of the rotor core. In the technical scheme of the application, on the basis of inhibiting the cross-axis armature reaction of the motor, relieving the magnetic saturation degree, reducing the load back electromotive force, improving the torque density and overload capacity of the motor, the position of the magnetic barrier can be set according to the rotation direction of the rotor structure; on the other hand, since the magnetic barrier is formed by hollowing out the rotor core, the weight of the rotor core can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a rotor structure, a motor structure and a compressor. BACKGROUND

[0002] For a compressor, the performance of the motor arranged inside the compressor is an important factor determining the use of the compressor. In the prior art, the performance and cost performance of the motor are gradually increasing. Under the action of the reaction of the cross-axis armature, the magnetic saturation degree of the motor is deepened, thereby hindering the improvement of the performance of the motor. SUMMARY

[0003] The present application aims to at least solve one of the problems in the prior art or related art.

[0004] Therefore, an embodiment of the first aspect of the present application provides a rotor structure.

[0005] An embodiment of the second aspect of the present application provides a motor structure.

[0006] An embodiment of the third aspect of the present application provides a compressor.

[0007] In order to achieve the above-mentioned purpose, an embodiment of the first aspect of the present application provides a rotor structure, comprising: a rotor core, a plurality of permanent magnet grooves are arranged on the rotor core, the plurality of permanent magnet grooves are arranged around the axial direction of the rotor core; a permanent magnet arranged in the permanent magnet groove; a magnetic barrier arranged on the rotor core, wherein the two ends of the magnetic barrier are respectively directed to the permanent magnet and the outer edge of the rotor core, and the two ends of the permanent magnet groove are directed to the outer edge of the rotor core.

[0008] According to the rotor structure provided by the embodiment of the first aspect of the present application, the rotor core and the permanent magnet arranged in the rotor core are included, so as to be driven under the magnetic action of the permanent magnet, and the rotor structure can rotate relative to the stator to realize the normal operation of the motor. Specifically, the permanent magnet groove is arranged on the rotor core, and the permanent magnet can be arranged in the permanent magnet groove, so as to facilitate the driving of the permanent magnet by the magnetic force. In addition, the position of the permanent magnet groove is special, and the two ends thereof are directed to different positions of the outer edge of the rotor core. Since the inside of the permanent magnet groove is connected, and the whole rotor structure is a rotating body to meet the rotation requirement of the motor, the positions of the two ends of the outer edge directed by the permanent magnet groove are located at different positions in the circumferential direction, and the permanent magnet is arranged in the permanent magnet groove, so as to fully utilize the space of the rotor core inside, and optimize the torque density.

[0009] In addition, by arranging the permanent magnet slot, in order to solve the problem of low performance-price ratio of the rotor structure, a magnetic barrier is arranged on the rotor core, the extending directions of the two ends of the magnetic barrier are limited to be towards the permanent magnet and the outer edge, so that the magnetic barrier can be used as a structure for relieving the magnetic saturation degree, and the magnetic barrier is formed during the rotation of the rotor structure, so as to improve the power density and the torque density of the motor, improve the overload capacity of the motor, effectively improve the torque ripple of the motor, greatly improve the performance of the motor on the basis of reducing the permanent magnet consumption of the motor, that is, reducing the production cost, and improve the performance-price ratio of the motor with the rotor structure and the product competitiveness.

[0010] According to the rotor structure, on the one hand, the position of the magnetic barrier can be arranged according to the rotation direction of the rotor structure on the basis of inhibiting the cross-axis armature reaction of the motor, relieving the magnetic saturation degree, reducing the back electromotive force under load, improving the torque density and the overload capacity of the motor; on the other hand, since the magnetic barrier is formed by hollowing out the rotor core, the weight of the rotor core can be reduced.

[0011] It can be understood that, for the rotor core, the permanent magnet slot and the outer edge of the rotor core are located in two directions, so that the two ends of the magnetic barrier are limited to be towards the permanent magnet and the outer edge of the rotor core, and the magnetic barrier itself will be bent.

[0012] The number of permanent magnet slots can be multiple, and generally, the multiple permanent magnet slots are uniformly arranged around the axis of the rotor core.

[0013] The extending direction of the permanent magnet slot can be the axial direction of the rotor core, or a direction at a certain angle with the axial direction, of course, considering the processing cost and difficulty, the permanent magnet slot is generally arranged in the axial direction and penetrates through the two end faces of the rotor core.

[0014] In addition, for the permanent magnet slot, at least one of the two ends can penetrate the end face, for example, both ends penetrate, or one end penetrates, and the two ends can also not penetrate the end face.

[0015] In addition, the rotor structure in the above-mentioned scheme provided by the application can also have the following additional technical features:

[0016] In the above technical scheme, the magnetic barrier is arranged between the permanent magnet slot and the outer edge of the rotor core.

[0017] In this technical scheme, by arranging the magnetic barrier between the permanent magnet slot and the outer edge of the rotor core, that is, in this area, the influence on the permanent magnet flux linkage can be reduced, and at the same time, the magnetic path can be standardized, and the magnetic field harmonic in the air gap can be weakened.

[0018] In the above technical solution, the rotor structure can rotate unidirectionally or bidirectionally along the circumferential direction. Along the rotation direction of the rotor structure, the magnetic barrier is provided on at least one side of the center line of each permanent magnet slot.

[0019] In this technical solution, the magnetic barrier can be provided on only one side of the center line of the permanent magnet slot, or on both sides of the center line of the permanent magnet slot, that is, on both sides of the circumference of the rotor core.

[0020] It should be particularly emphasized that since the rotation direction of the rotor structure in this application is different due to the restrictions of the motor, for example, it may be used for a unidirectional motor, for a unidirectional motor, the position of the magnetic barrier can be set according to the rotation direction of the rotor structure, so as to meet the requirements for motor performance while further reducing processing costs.

[0021] In the above technical solution, the rotor structure rotates unidirectionally. In the rotation direction of the rotor structure, at least one magnetic barrier corresponding to each permanent magnet slot is provided at the rear side of the permanent magnet slot.

[0022] In this technical solution, when the rotor structure rotates unidirectionally, a magnetic barrier is placed behind the permanent magnet slots in the direction of rotation to limit the rotation of the rotor structure. In other words, the magnetic barrier is placed on the weak-field side of the permanent magnet slots. As the rotor structure rotates, the permanent magnets form a weak-field side and a strong-field side in the magnetization direction. By placing the magnetic barrier on the weak-field side of the permanent magnet slots, the motor's quadrature-axis armature reaction is suppressed, thereby alleviating the saturation of the rotor core.

[0023] It can be understood that the rear side of the permanent magnet slot is the side that first passes a fixed position during rotation. For example, in counterclockwise rotation, the entire rotor structure is divided into multiple sectors. For each sector, if the centerline of the permanent magnet slot is set at 6 o'clock, the magnetic barrier will be located at 7 o'clock. For another example, in clockwise rotation, if the centerline of the permanent magnet slot is set at 6 o'clock, the magnetic barrier will be located at 5 o'clock.

[0024] In the above technical solution, the permanent magnet slot includes at least one arc segment and / or at least one straight segment.

[0025] In this technical solution, the permanent magnet slot can be composed of one or more arc segments, or one or more straight segments, or a combination of arc segments and straight segments. It is only necessary to connect the two ends of the permanent magnet slot to different parts of the outer edge facing the rotor core.

[0026] In the above technical solution, the permanent magnet slot includes an arc segment, and the permanent magnet slot is U-shaped.

[0027] In the technical solution, the permanent magnet slot is mainly composed of an arc segment, and the permanent magnet slot is in a U shape as a whole; at this time, the two ends of the opening of the U shape are both directed to the outer edge of the rotor core, the transition of the whole permanent magnet slot is relatively smooth, and on this basis, the magnetic barrier is arranged on the radial outer side of the permanent magnet slot, the magnetic force line path is regulated through reasonable distribution, and the magnetic field harmonic in the air gap is weakened.

[0028] In the technical solution, the permanent magnet slot includes two straight segments, and the permanent magnet slot is in a V shape as a whole.

[0029] In the technical solution, the permanent magnet slot is mainly composed of two straight segments, and the permanent magnet slot is in a V shape as a whole; at this time, the two ends of the opening of the V shape are both directed to the outer edge of the rotor core, the transition of the whole permanent magnet slot is relatively smooth, and on this basis, the magnetic barrier is arranged on the radial outer side of the permanent magnet slot, the magnetic force line path is regulated through reasonable distribution, and the magnetic field harmonic in the air gap is weakened.

[0030] In the technical solution, the magnetic barrier specifically includes: a first slot segment, the first slot segment extends towards the permanent magnet slot; and a second slot segment, the second slot segment is in communication with the first slot segment and extends towards the circumference of the rotor core.

[0031] In the technical solution, the magnetic barrier mainly includes two parts, namely the first slot segment and the second slot segment, and the first slot segment and the second slot segment are in communication, wherein the ends, away from each other, of the first slot segment and the second slot segment are directed to the permanent magnet slot and the circumference of the rotor core respectively, the two parts of the magnetic barrier are directed to different positions, and the two parts need to be in communication, so that the mutual reaction of the motor can be effectively inhibited under the joint action of the two parts, and the effect of relieving the magnetic saturation degree is achieved. In the technical solution, the end, away from the second slot segment, of the first slot segment is not in communication with the permanent magnet slot, and / or the end, away from the first slot segment, of the second slot segment is not in communication with the circumference of the rotor core.

[0032] In the technical solution, by limiting at least one end, away from each other, of the first slot segment and the second slot segment not to be in communication, the overall strength of the rotor structure can be ensured. It can be understood that the magnetic barrier is arranged on the rotor core, if both ends are in communication, part of the rotor core will be directly broken, and in the absence of other structures, deviation or collision may occur, so by limiting at least one of the two not to be in communication, the overall strength can be effectively improved.

[0033] In the technical solution, on the cross section of the rotor core, the rotor core is divided into 2P fan-shaped regions by the plurality of permanent magnet slots, and the included angle between the extension direction of the first slot segment and the extension direction of the permanent magnet slot is [(180° / 2P), 90°]; on the cross section of the rotor core, the included angle between the extension direction of the second slot segment and the rotation direction of the rotor core is [60°, 120°].

[0034] In this technical solution, by restricting the extension direction of the first slot segment and the second slot segment, the quadrature-axis armature reaction of the motor can be effectively suppressed under the action of the magnetic barrier, the degree of magnetic saturation can be alleviated, and the impact on the permanent magnet flux can be reduced. At the same time, the magnetic field line path can be standardized, the magnetic field harmonics in the air gap can be weakened, and the torque ripple of the motor can be improved. Specifically, the cross section of the rotor core is the normal plane of the axis of the rotor core. On this cross section, the angle between the extension direction of the first slot segment and the extension direction of the permanent magnet slot is greater than or equal to 180° / 2P) and less than or equal to 90°, where 2p is the number of fan-shaped areas. When the cross section of the rotor core is circular, 2p is also the number of permanent magnet slots. Alternatively, on this cross section, the extension direction of the second slot segment and the rotation direction of the rotor core can be orthogonal or approximately orthogonal, and the specific angle range between the two can be greater than or equal to 60° and less than or equal to 120°. In the above technical solution, the end of the first slot segment away from the second slot segment is connected to the permanent magnet slot.

[0035] In this technical solution, by limiting the end of the first slot segment facing the permanent magnet slot to be directly connected to the permanent magnet slot, during processing, it can be directly cut from the permanent magnet slot side and extended into the rotor core, which is convenient for processing. In terms of structure, the first slot segment is directly connected to the permanent magnet slot to achieve the effect of suppressing the quadrature-axis armature reaction of the motor.

[0036] In the above technical solution, there is a first distance between the end of the first slot segment away from the second slot segment and the permanent magnet slot.

[0037] In this technical solution, one end of the first slot segment facing the permanent magnet slot is not connected to the permanent magnet slot through restriction, that is, there is a certain distance between the two. For the magnetic barrier as a whole, one end is a closed structure, and in terms of structure, there is a certain distance between the first slot segment and the permanent magnet slot, which can also achieve the effect of suppressing the quadrature-axis armature reaction of the motor.

[0038] In the above technical solution, the first spacing is greater than or equal to 0.2 mm.

[0039] In this technical solution, when the first slot segment is not connected to the permanent magnet slot, the distance between the two needs to be greater than or equal to 0.2 mm, so that the structural strength of the rotor core between the first slot segment and the permanent magnet slot can be ensured when the rotor core is processed.

[0040] In the above technical solution, one end of the second slot segment away from the first slot segment is connected to the periphery of the rotor core.

[0041] In this technical solution, by limiting one end of the second slot segment toward the periphery to be directly connected to the periphery, it can be directly cut and extended from the outside of the rotor core during processing, which is convenient for processing. In terms of structure, the second slot segment is directly connected to the periphery to achieve the effect of suppressing the cross-axis armature reaction of the motor.

[0042] In the technical solution, a second gap exists between the end of the second slot segment away from the first slot segment and the periphery of the rotor core.

[0043] In the technical solution, the end of the second slot segment toward the periphery is not communicated with the periphery by limiting, that is, a certain gap exists between the two, and for the magnetic barrier as a whole, the end is a closed structure, and in terms of structure, a certain gap exists between the second slot segment and the periphery, which can also achieve the effect of inhibiting the cross-axis armature reaction of the motor.

[0044] In the technical solution, the second gap is greater than or equal to 0.2 mm.

[0045] In the technical solution, when the second slot segment is not communicated with the periphery, the gap between the two needs to be greater than or equal to 0.2 mm, so as to ensure a certain strength of the periphery when the rotor core is processed.

[0046] In a specific embodiment, the extension direction of the first slot segment is the same as that of the second slot segment. By designing the first slot segment and the second slot segment in the same extension direction, the magnetic barrier as a whole can be in a straight line or an arc line with a single curvature, so that it can be realized by one-time processing when processing, improving the processing efficiency.

[0047] In another specific embodiment, the extension direction of the first slot segment is different from that of the second slot segment. By designing the first slot segment and the second slot segment in different extension directions, the space arrangement and the inhibiting effect on the armature can be considered.

[0048] In the technical solution, among the plurality of magnetic barriers on the same side of the center line of the permanent magnet slot, the first slot segments of at least two adjacent magnetic barriers have inconsistent communication relationship with the permanent magnet slot, and the second slot segments have inconsistent communication relationship with the outer edge of the rotor core.

[0049] In the technical solution, for the magnetic barriers on the same side of the center line of the same permanent magnet slot, the communication relationship of the first slot segment and the second slot segment is staggered. It can be understood that if the first slot segment is communicated with the permanent magnet slot, it will have a greater armature inhibiting effect, but due to the direct opening design, it will have a certain impact on the strength. If the first slot segment is not communicated with the permanent magnet slot, it has a certain strength, but the inhibiting effect on the armature is slightly weaker, and the communication relationship of the second slot segment and the outer edge is the same. By the staggered communication relationship, the armature inhibiting effect and the strength can be comprehensively improved, and the use feasibility of the rotor structure is improved.

[0050] In the technical solution, among the plurality of magnetic barriers on the same side of the center line of the permanent magnet slot, the first slot segment of at least one magnetic barrier is not communicated with the permanent magnet slot, and the second slot segment is not communicated with the outer edge of the rotor core.

[0051] In the technical solution, the first slot section and the second slot section of the magnetic barrier arranged on one side of the center line of the permanent magnet slot are respectively not communicated with the permanent magnet slot and the outer edge, so that the structural strength of the rotor core during operation can be effectively improved, thereby improving the overall stability of the rotor structure during rotation.

[0052] In the technical solution, the plurality of magnetic barriers corresponding to the permanent magnet slot are symmetrical about the center line of the permanent magnet slot.

[0053] In the technical solution, the magnetic barriers corresponding to the same permanent magnet slot are symmetrical, so as to improve the uniformity of the armature suppression effect in different directions of rotation, and reduce the possible jumping during switching of the direction of rotation.

[0054] In the technical solution, the rotor core specifically includes a plurality of laminated stampings, wherein an assembly opening is arranged on each stamping, and the plurality of assembly openings form the permanent magnet slot.

[0055] In the technical solution, in order to facilitate processing, the rotor core is mainly composed of a plurality of stampings, and the rotor core can be formed by laminating and assembling the plurality of stampings. It should be noted that the assembly opening can be formed on each stamping during processing, and then the plurality of assembly openings can form the permanent magnet slot for accommodating the permanent magnet after assembly, so as to facilitate the rotation of the rotor structure.

[0056] In the technical solution, the plurality of stampings form a plurality of core sections arranged along the axial direction, and the plurality of core sections are arranged along the axial direction of the rotor core to form the rotor core.

[0057] In the technical solution, the laminated stampings are divided into a plurality of sections, each section is composed of a plurality of stampings, and the plurality of core sections arranged along the axial direction can form the rotor core to realize the electromagnetic effect of the rotor in the motor.

[0058] The embodiment of the second aspect of the application provides a motor structure, which comprises a stator and a rotor structure as in the technical solution of the first aspect.

[0059] The motor structure provided by the embodiment of the second aspect of the application comprises a stator and a rotor structure, wherein the motor structure is provided with the rotor structure as in the technical solution of the first aspect, and thus has the beneficial effects of any of the rotor structures, which will not be described herein.

[0060] It should be emphasized that since the motor structure comprises the above rotor structure, on the one hand, the cross-axis armature reaction of the motor can be effectively suppressed, the magnetic saturation degree can be relieved, the load back electromotive force can be reduced, the torque density and overload capacity of the motor can be improved; on the other hand, the magnetic field harmonics of the rotor in the air gap can be weakened, and the torque ripple of the motor can be improved.

[0061] The embodiment of the third aspect of the present application provides a compressor, comprising: a shell; and the motor structure in the second aspect.

[0062] The compressor provided by the third aspect of the present application comprises a shell and a motor structure arranged in the shell. The motor structure is arranged in the outdoor unit, and has the beneficial effects of the motor structure, which will not be described herein again.

[0063] Additional aspects and advantages of the present application will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0064] Figure 1 A structural schematic diagram of a rotor structure according to one embodiment of the present application is shown;

[0065] Figure 2 A structural schematic diagram of a rotor structure according to one embodiment of the present application is shown;

[0066] Figure 3 A partial enlarged schematic diagram of part A of Figure 2 is shown;

[0067] Figure 4 A partial enlarged schematic diagram of part B of Figure 2 is shown;

[0068] Figure 5 A structural schematic diagram of a rotor structure according to one embodiment of the present application is shown;

[0069] Figure 6 A structural schematic diagram of a rotor structure according to one embodiment of the present application is shown;

[0070] Figure 7 A structural schematic diagram of a rotor structure according to one embodiment of the present application is shown;

[0071] Figure 8 A structural schematic diagram of a rotor structure according to one embodiment of the present application is shown;

[0072] Figure 9 A structural schematic diagram of a rotor structure according to one embodiment of the present application is shown;

[0073] Figure 10 A structural schematic diagram of a rotor structure according to one embodiment of the present application is shown;

[0074] Figure 11 A partial enlarged schematic diagram of part C of Figure 10 is shown;

[0075] Figure 12 Fig. 1 shows a schematic view of a motor structure according to an embodiment of the present application; Figure 10 Fig. 2 shows a partial enlarged schematic view of the middle D part of Fig. 1;

[0076] Figure 13 Fig. 3 shows a schematic view of a rotor structure according to an embodiment of the present application;

[0077] Figure 14 Fig. 4 shows a schematic view of a rotor structure according to an embodiment of the present application;

[0078] Figure 15 Fig. 5 shows a schematic view of a rotor structure according to an embodiment of the present application;

[0079] Figure 16 Fig. 6 shows a schematic view of a rotor structure according to an embodiment of the present application;

[0080] Figure 17 Fig. 7 shows a schematic view of a rotor structure according to an embodiment of the present application;

[0081] Figure 18 Fig. 8 shows a schematic view of a rotor structure according to an embodiment of the present application;

[0082] Figure 19 Fig. 9 shows a schematic view of a rotor structure according to an embodiment of the present application;

[0083] Figure 20 Fig. 10 shows a schematic view of a motor structure according to an embodiment of the present application;

[0084] Figure 21 Fig. 11 shows a schematic view of a compressor according to an embodiment of the present application.

[0085] Fig. 12 shows a schematic view of a motor structure according to an embodiment of the present application; Figures 1 to 21 Correspondence between reference signs and component names in the middle part is as follows:

[0086] 100: rotor structure; 102: rotor core; 1022: lamination; 1024: assembly opening; 103: permanent magnet slot; 104: permanent magnet; 106: magnetic barrier; 1062: first slot section; 1064: second slot section; 200: motor structure; 202: stator; 204: air gap; 300: compressor; 302: shell. DETAILED DESCRIPTION

[0087] In order to enable a clearer understanding of the above-mentioned purposes, features and advantages of the embodiments of the present application, the embodiments of the present application are further described in detail below with reference to the drawings and specific embodiments. 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.

[0088] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the embodiments of the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0089] Refer to the following Figures 1 to 21 Some embodiments according to the present invention are described.

[0090] Example 1

[0091] like Figures 1 to 5 As shown, a rotor structure 100 proposed in this embodiment includes a rotor core 102 and a permanent magnet 104 disposed within the rotor core 102. Driven by the magnetic action of the permanent magnet 104, the rotor structure can rotate relative to the stator to achieve normal operation of the motor. Specifically, the rotor core 102 is provided with a permanent magnet slot 103 extending through both end surfaces. The permanent magnet 104 can be disposed within the permanent magnet slot 103, facilitating magnetic drive of the permanent magnet 104. Furthermore, the position of the permanent magnet slot 103 is relatively special, with its two ends facing different positions on the outer edge of the rotor core 102. Since the interior of the permanent magnet slot 103 is interconnected, and the rotor structure as a whole is a rotating body, in order to meet the rotation requirements of the motor, the two ends of the permanent magnet slot 103 facing the outer edge are located at different circumferential positions. Furthermore, the permanent magnet 104 is disposed within the permanent magnet slot 103, thereby fully utilizing the internal core space of the rotor and optimizing the torque density.

[0092] In addition, for the permanent magnet slot 103 , at least one of the two ends may be penetrated through the end surface, for example, both ends may be penetrated, or one end may be penetrated, or neither end may be penetrated through the end surface.

[0093] In addition, by providing the permanent magnet slots 103 of the above structure, in order to solve the problem of low cost-effectiveness of the rotor structure, a magnetic barrier 106 is further provided on the rotor core 102. By limiting the extension direction of the two ends of the magnetic barrier 106 to be toward the permanent magnet 104 and the outer edge, the magnetic barrier 106 can be used as a structure to alleviate the degree of magnetic saturation. The magnetic barrier 106 is formed during the rotation of the rotor structure to improve the power density and torque density of the motor, enhance the overload capacity of the motor, and effectively improve the torque ripple of the motor. On the basis of reducing the amount of permanent magnets used in the motor, that is, reducing production costs, the motor performance is greatly improved, the cost-effectiveness of the motor using the rotor structure is improved, and the product competitiveness is improved.

[0094] According to the rotor structure, on one hand, the position of the magnetic barrier 106 can be set according to the limit of the rotation direction of the rotor structure, on the basis of inhibiting the cross-axis armature reaction of the motor, relieving the degree of magnetic saturation, reducing the back electromotive force under load, improving the torque density and overload capacity of the motor; on the other hand, the weight of the rotor core 102 can be reduced due to the hollowing of the magnetic barrier 106 on the rotor core 102.

[0095] It can be understood that for the rotor core 102, the permanent magnet slot 103 and the circumference of the rotor core 102 are located in two directions, so that by limiting the two ends of the magnetic barrier 106 to face the permanent magnet 104 and the outer edge of the rotor core 102 respectively, the magnetic barrier 106 itself will be bent to a certain extent.

[0096] Among them, the number of permanent magnet slots 103 can be multiple, generally, multiple permanent magnet slots 103 are uniformly arranged around the axis of the rotor core 102.

[0097] Among them, the extension direction of the permanent magnet slot can be the axial direction of the rotor core, or a direction at a certain angle with the axial direction, of course, considering the processing cost and difficulty, generally only the permanent magnet slot needs to be arranged along the axial direction and penetrates through the two end faces of the rotor core.

[0098] It can be understood that for the rotor core 102, the permanent magnet slot 103 and the circumference of the rotor core 102 are located in two directions, so that by limiting the two ends of the magnetic barrier 106 to face the permanent magnet 104 and the outer edge of the rotor core 102 respectively, the magnetic barrier 106 itself will be bent to a certain extent.

[0099] Further, in order to facilitate processing, the rotor core 102 is mainly composed of a plurality of punched sheets 1022, and the rotor core 102 can be formed by stacking and assembling a plurality of punched sheets 1022, it should be noted that during processing, the assembly opening 1024 can be formed on each punched sheet 1022, and after assembly, a plurality of assembly openings 1024 can form a permanent magnet slot 103 for accommodating a permanent magnet 104, so as to facilitate the rotation of the rotor structure 100.

[0100] Further, the stacked punched sheets are divided into multiple sections, each section is composed of a plurality of punched sheets, and the multiple core sections arranged along the axial direction can form a rotor core to realize the electromagnetic effect of the rotor in the motor.

[0101] In a specific embodiment, the cross-section of the rotor core 102 is circular, and the rotor core 102 as a whole is cylindrical. By setting an even number of permanent magnet slots 103, the rotor core 102 can be divided into the same number of sector-shaped areas. It can be understood that the permanent magnet slots 103 will be evenly arranged on the rotor core 102 around the axis, and there is a permanent magnet slot 103 on each circumferential side of each sector-shaped area. On the one hand, it is convenient for the installation of the permanent magnet 104, and on the other hand, it is also conducive to the overall processing and assembly.

[0102] Example 2

[0103] like Figures 1 to 5 As shown, a rotor structure 100 proposed in this embodiment includes a rotor core and a permanent magnet disposed within the rotor core, so that the rotor structure can be driven by the magnetic action of the permanent magnet and rotate relative to the stator to achieve normal operation of the motor. Specifically, a permanent magnet slot is provided on the rotor core that passes through the two end faces, and the permanent magnet can be disposed within the permanent magnet slot, which can facilitate the permanent magnet being driven by magnetic force. In addition, the position of the permanent magnet slot is relatively special, with its two ends facing different positions on the outer edge of the rotor core. Since the interior of the permanent magnet slot is connected, and the rotor structure as a whole is a rotating body, in order to meet the rotation requirements of the motor, the positions of the two ends of the permanent magnet slot facing the outer edge are located at different circumferential positions, and the permanent magnet is disposed within the permanent magnet slot, so that the internal core space of the rotor can be fully utilized to optimize the torque density.

[0104] In addition, by setting the permanent magnet slots of the above structure, in order to solve the problem of low cost performance of the rotor structure, a magnetic barrier is also provided on the rotor core. By limiting the extension direction of the two ends of the magnetic barrier to be toward the permanent magnet and the outer edge, the magnetic barrier can be used as a structure to alleviate the degree of magnetic saturation. The magnetic barrier is formed during the rotation of the rotor structure to increase the power density and torque density of the motor, enhance the overload capacity of the motor, and effectively improve the torque pulsation of the motor. On the basis of reducing the amount of permanent magnets used in the motor, that is, reducing production costs, the motor performance is greatly improved, the cost performance of the motor using the rotor structure is improved, and the product competitiveness is improved.

[0105] In this embodiment, the magnetic barrier is arranged between the permanent magnet slots and the outer edge of the rotor core. That is, in this area, the influence on the permanent magnet flux linkage can be reduced while regulating the magnetic field line path and weakening the magnetic field harmonics in the air gap.

[0106] The magnetic barrier 106 mainly includes two parts, i.e., a first slot section 1062 and a second slot section 1064, and the first slot section 1062 and the second slot section 1064 are in communication. The first slot section 1062 and the second slot section 1064 are respectively directed to the periphery of the rotor core 102 and the permanent magnet slot 103 at the ends away from each other. The two parts of the magnetic barrier 106 are directed to different positions, and the two parts need to be in communication. The motor cross-axis armature reaction can be effectively inhibited under the joint action of the two parts, so as to relieve the magnetic saturation degree, improve the power density and torque density of the motor, improve the overload capacity of the motor, and effectively improve the torque ripple of the motor.

[0107] Further, the extension directions of the first slot section 1062 and the second slot section 1064 are limited, so as to effectively inhibit the motor cross-axis armature reaction and relieve the magnetic saturation degree under the action of the magnetic barrier, improve the power density and torque density of the motor, improve the overload capacity of the motor, and effectively improve the torque ripple of the motor. Specifically, the cross section of the rotor core 102 is a normal plane of the axis of the rotor core 102. In the cross section, the rotor core is divided into 2P fan-shaped regions by the plurality of permanent magnet slots. The included angle between the extension direction of the first slot section and the extension direction of the permanent magnet slot is [(180° / 2P), 90°]. Of course, in the cross section, the extension direction of the second slot section 1064 and the rotation direction of the rotor core 102 can be orthogonal or approximately orthogonal. Specifically, the angle range between the two can be [60°, 120°].

[0108] In a specific embodiment, the first slot section 1062 and the second slot section 1064 are in communication. The transition between the first slot section 1062 and the second slot section 1064 can be relatively smooth by limiting the transition, so as to reduce the processing difficulty and processing cost.

[0109] It can be understood that the smooth transition between the first slot section 1062 and the second slot section 1064 is a curve transition. When a certain included angle is formed between the first slot section 1062 and the second slot section 1064, if the slot widths of the two slot sections are the same, the transition can also be a circular arc transition.

[0110] In a specific embodiment, the cross section of the permanent magnet slot is a polygon. The polygon-shaped permanent magnet slot can more effectively occupy the space of the rotor core, i.e., the internal rotor core space can be fully utilized, so that the torque density is optimized. From the outer side to the inner side of the rotor in the radial direction, the magnetization direction presents a narrow-wide-narrow structure. The width of the narrow part is w1, and the width of the wide part is w2. The relationship satisfies w2≥w1.

[0111] For the same permanent magnet slot 103 on the center line of the same side of the magnetic barrier, the communication relationship of the first slot section 1062 and the second slot section 1064 is staggered. It can be understood that if the first slot section 1062 is in communication with the permanent magnet slot 103, it will have a larger armature suppression effect, but due to the direct break design, it will have a certain impact on the strength. If the first slot section 1062 is not in communication with the permanent magnet slot 103, it has a certain strength, but the suppression effect on the armature is slightly weaker. The communication relationship of the second slot section 1064 and the outer edge is the same. Through the staggered communication relationship, the armature suppression effect and the strength can be comprehensively improved, and the use feasibility of the rotor structure can be improved.

[0112] By limiting the first slot section 1062 and the second slot section 1064 of the magnetic barrier arranged on one side of the center line of the permanent magnet slot 103 from being in communication with the permanent magnet slot 103 and the outer edge respectively, it can be understood that since both ends are not in communication, the structural strength of the rotor core during operation can be effectively improved, thereby improving the overall stability of the rotor structure during rotation.

[0113] Embodiment three

[0114] As shown in Figures 1 to 5 , the rotor structure 100 proposed in this embodiment includes a rotor core 102 and a permanent magnet 104 arranged in the rotor core 102, so as to be driven under the magnetic action of the permanent magnet 104. The rotor structure 100 can rotate relative to the stator 202 to realize normal operation of the motor. Specifically, the permanent magnet slot 103 is provided on the rotor core 102 and penetrates two end faces. The permanent magnet 104 can be arranged in the permanent magnet slot 103, which can facilitate the driving of the permanent magnet 104 by the magnetic force. The magnetic barrier 106 is also provided on the rotor core 102. By limiting the extension direction of both ends of the magnetic barrier 106 to be towards the permanent magnet 104 and the outer edge, the magnetic barrier 106 can be used as a structure to alleviate the degree of magnetic saturation. During the rotation of the rotor structure 100, the magnetic barrier is formed to improve the power density and torque density of the motor, improve the overload capacity of the motor, effectively improve the torque ripple of the motor, and greatly improve the performance of the motor on the basis of reducing the permanent magnet usage of the motor, i.e. reducing the production cost. The performance-price ratio of the motor using the rotor structure 100 is improved, and the product competitiveness is improved.

[0115] Among them, the magnetic barrier 106 mainly includes two parts, namely the first slot section 1062 and the second slot section 1064, which are in communication. One end of the first slot section 1062 and the second slot section 1064, which are away from each other, respectively faces the permanent magnet slot 103 and the circumference of the rotor core 102. The two parts of the magnetic barrier 106 face different positions, and the two parts need to be in communication. The two parts can effectively suppress the cross-axis armature reaction of the motor under the joint action of the two parts, thereby alleviating the effect of magnetic saturation.

[0116] For the first slot segment 1062, in one embodiment, the first slot segment 1062 is directly communicated to the permanent magnet slot 103 at one end thereof, and in machining, the first slot segment 1062 can be directly cut into the rotor core 102 from the permanent magnet slot 103, facilitating machining, and in structure, the first slot segment 1062 is directly communicated to the permanent magnet slot 103, so as to achieve the effect of suppressing the cross-axis armature reaction of the motor.

[0117] In another embodiment, the first slot segment 1062 is not communicated to the permanent magnet slot 103 at one end thereof, that is, there is a certain spacing between the two, and for the magnetic barrier 106 as a whole, one end thereof is a closed structure, and in structure, the first slot segment 1062 is spaced apart from the permanent magnet slot 103, so as to achieve the effect of suppressing the cross-axis armature reaction of the motor.

[0118] In this case, the first spacing between the first slot segment 1062 and the permanent magnet slot 103 is greater than or equal to 0.2 mm.

[0119] For the second slot segment 1064, in one embodiment, the second slot segment 1064 is directly communicated to the periphery at one end thereof, and in machining, the second slot segment 1064 can be directly cut into the rotor core 102 from the outside thereof, facilitating machining, and in structure, the second slot segment 1064 is directly communicated to the periphery, so as to achieve the effect of suppressing the cross-axis armature reaction of the motor.

[0120] In another embodiment, the second slot segment 1064 is not communicated to the periphery at one end thereof, that is, there is a certain spacing between the two, and for the magnetic barrier 106 as a whole, one end thereof is a closed structure, and in structure, the second slot segment 1064 is spaced apart from the periphery, so as to achieve the effect of suppressing the cross-axis armature reaction of the motor.

[0121] In this case, the second spacing between the second slot segment 1064 and the periphery is greater than or equal to 0.2 mm.

[0122] It is emphasized that the communication relationship of the first slot segment 1062 and the second slot segment 1064 with the permanent magnet slot 103 and the periphery respectively has four combinations, specifically: the first slot segment 1062 is communicated, and the second slot segment 1064 is not communicated; the first slot segment 1062 is communicated, and the second slot segment 1064 is communicated; the first slot segment 1062 is not communicated, and the second slot segment 1064 is communicated; and the first slot segment 1062 is not communicated, and the second slot segment 1064 is not communicated.

[0123] In the case of communication, the q-axis inductance can be effectively reduced, the cross-axis armature reaction of the motor can be suppressed, and the core saturation can be alleviated, and in the case of non-communication, the structural strength of the rotor can be ensured.

[0124] In one specific embodiment, the first slot section 1062 and the second slot section 1064 have the same extension direction. By designing the first slot section 1062 and the second slot section 1064 to have the same extension direction, the magnetic barrier as a whole can be linear or have a single curvature, so that it can be achieved by one-time processing during processing, improving the processing efficiency.

[0125] In another specific embodiment, the first slot section 1062 and the second slot section 1064 have different extension directions. By designing the first slot section 1062 and the second slot section 1064 to have different extension directions, the spatial arrangement and the armature suppression effect can be considered.

[0126] Further, for the magnetic barriers on the same side of the center line on the same permanent magnet slot, the first slot section 1062 and the second slot section 1064 have staggered connection relationship. It can be understood that if the first slot section 1062 is connected with the permanent magnet slot, it will have a greater armature suppression effect, but due to the direct opening design, it will have a certain impact on the strength. If the first slot section 1062 is not connected with the permanent magnet slot, it has a certain strength, but the armature suppression effect is slightly weaker. The connection relationship between the second slot section 1064 and the outer edge is the same. By the staggered connection relationship, the armature suppression effect and the strength can be comprehensively improved, and the use feasibility of the rotor structure can be improved.

[0127] Further, the magnetic barriers corresponding to the same permanent magnet slot are symmetrical, so as to improve the uniformity of the armature suppression effect when rotating in different directions, and to reduce the possible bounce when switching the rotating direction.

[0128] The number of the permanent magnet slots 103 arranged on the rotor core 102 is multiple, and the connection relationship between the first slot section 1062 and the second slot section 1064 of each permanent magnet slot 103 is independent, so that it can be flexibly selected and arranged according to the actual needs.

[0129] Embodiment Four

[0130] As Figures 1 to 5As shown, the rotor structure 100 proposed in this embodiment includes a rotor core 102 and a permanent magnet 104 arranged in the rotor core 102, so as to be driven under the magnetic action of the permanent magnet 104, and the rotor structure 100 can rotate relative to the stator 202 to realize normal operation of the motor. Specifically, the rotor core 102 is provided with a permanent magnet slot 103 penetrating through two end faces, and the permanent magnet 104 can be arranged in the permanent magnet slot 103, so as to facilitate driving of the permanent magnet 104 by the magnetic force. The rotor core 102 is also provided with a magnetic barrier 106, and the extension directions of both ends of the magnetic barrier 106 are towards the permanent magnet 104 and the outer edge, so that the magnetic barrier 106 can be used as a structure for relieving the magnetic saturation degree, and the magnetic barrier is formed during rotation of the rotor structure 100, so as to improve the power density and torque density of the motor, improve the overload capacity of the motor, effectively improve the torque ripple of the motor, greatly improve the performance of the motor on the basis of reducing the permanent magnet consumption of the motor, i.e., reducing the production cost, improve the performance-price ratio of the motor using the rotor structure 100, and improve the product competitiveness.

[0131] According to the rotor structure 100 of the present scheme, on the one hand, the cross-axis armature reaction of the motor is effectively inhibited, the magnetic saturation degree is relieved, and the load back electromotive force is reduced, and the torque density and overload capacity of the motor are improved; on the other hand, since the magnetic barrier 106 is formed by hollowing out the rotor core 102, the consumption of the rare earth permanent magnet 104 can also be reduced.

[0132] For the structure in which the magnetic barriers are arranged on both sides in the magnetizing direction, the connection modes of both ends of the magnetic barriers are diversified, and are specifically shown in Figure 1 and Figures 6 to 12 .

[0133] As shown in Figure 1 , the permanent magnet slot 103 is provided with a magnetic barrier 106 on each fan-shaped region radially outside, the magnetic barrier 106 is symmetrical about the radial center line of the permanent magnet 104, there are two magnetic barriers 106 on one side of the radial center line of the permanent magnet 104, but the present application is not limited to two magnetic barriers 106. The two magnetic barriers 106 are not connected to the permanent magnet slot 103, and the two magnetic barriers 106 are not connected to the air gap radially outside each fan-shaped region of the rotor core. On one side of the radial center line of the fan-shaped region permanent magnet 104, all the magnetic barriers 106 are not connected to the permanent magnet slot 103, and on the radially outer side of each fan-shaped region of the rotor core, all the magnetic barriers 106 are not connected to the air gap.

[0134] As shown in Figure 5As shown, a magnetic barrier 106 is provided in each sector-shaped region radially outward of the permanent magnet slot 103. The magnetic barriers 106 are symmetrical about the radial centerline of the permanent magnet 104. There are two magnetic barriers 106 on one side of the radial centerline of the permanent magnet 104, but the present invention is not limited to two magnetic barriers 106. One magnetic barrier 106 is connected to the permanent magnet slot 103, and one magnetic barrier 106 is connected to the air gap radially outward of each sector-shaped region of the rotor core. In each sector-shaped region, on one side of the radial centerline of the permanent magnet 104, at least one magnetic barrier 106 is connected to the permanent magnet slot 103, and at least one magnetic barrier 106 is connected to the air gap radially outward of each sector-shaped region of the rotor core.

[0135] like Figure 6 As shown, a magnetic barrier 106 is provided in each sector-shaped region radially outward of the permanent magnet slot 103. The magnetic barriers 106 are symmetrical about the radial centerline of the permanent magnet 104. There are two magnetic barriers 106 on one side of the radial centerline of the permanent magnet 104, but the present invention is not limited to two magnetic barriers 106. One magnetic barrier 106 is connected to the permanent magnet slot 103, and one magnetic barrier 106 is connected to the air gap radially outward of each sector-shaped region of the rotor core. On one side of the radial centerline of the permanent magnet 104 in each sector-shaped region, at least one magnetic barrier 106 is connected to the permanent magnet slot 103, and at least one magnetic barrier 106 is connected to the air gap radially outward of each sector-shaped region of the rotor core.

[0136] like Figure 7 As shown, each sector-shaped region radially outward of the permanent magnet slot 103 is provided with a magnetic barrier 106. The magnetic barriers 106 are symmetrical about the radial centerline of the permanent magnet 104. There are two magnetic barriers 106 on one side of the radial centerline of the permanent magnet 104, but the present invention is not limited to two magnetic barriers 106. Among them, two magnetic barriers 106 are not connected to the permanent magnet slot 103, and two magnetic barriers 106 are connected to the air gap radially outward of each sector-shaped region of the rotor core. On one side of the radial centerline of the permanent magnet 104 in each sector-shaped region, there is at least one magnetic barrier 106 that is not connected to the permanent magnet slot 103. At least one magnetic barrier 106 is connected to the air gap radially outward of each sector-shaped region of the rotor core.

[0137] like Figure 8 As shown, a magnetic barrier 106 is provided in each sector-shaped region radially outward of the permanent magnet slot 103. The magnetic barriers 106 are symmetrical about the radial centerline of the permanent magnet 104. There are two magnetic barriers 106 on one side of the radial centerline of the permanent magnet 104, but the present invention is not limited to two magnetic barriers 106. Among them, two magnetic barriers 106 are connected to the permanent magnet slot 103, and the two magnetic barriers 106 are not connected to the air gap radially outward of each sector-shaped region of the rotor core. On one side of the radial centerline of the permanent magnet 104 in each sector-shaped region, at least one magnetic barrier 106 is connected to the permanent magnet slot 103, and at least one magnetic barrier 106 is not connected to the air gap radially outward of each sector-shaped region of the rotor core.

[0138] In the case of unidirectional rotation of the rotor structure, the magnetic barrier 106 is positioned on the rear side of the permanent magnet slot 103 in the direction of rotation of the rotor structure. That is, the magnetic barrier 106 is positioned on the weak magnetic side of the permanent magnet slot 103. When the rotor structure rotates, the permanent magnet 104 forms a weak magnetic side and a strong magnetic side in the magnetization direction. By positioning the magnetic barrier 106 on the weak magnetic side of the permanent magnet slot 103, the quadrature-axis armature reaction of the motor can be suppressed, thereby alleviating the saturation of the rotor core. It can be understood that the rear side of the permanent magnet slot 103 is the side that first passes through a fixed position during rotation. For example, when rotating counterclockwise, the entire rotor structure is divided into multiple sector-shaped structures. For each sector-shaped structure, if the center line of the permanent magnet slot 103 is set at the six o'clock direction, the magnetic barrier 106 will be set at the seven o'clock direction. For another example, when rotating clockwise, if the center line of the permanent magnet slot 103 is set at the six o'clock direction, the magnetic barrier 106 will be set at the five o'clock direction.

[0139] For a structure in which a magnetic barrier 106 is provided on the weak magnetic side in the magnetization direction, there are various ways of connecting the two ends of the magnetic barrier 106, as follows:

[0140] like Figure 9 As shown, when the motor rotates counterclockwise, two magnetic barriers 106 are provided in the rear half of the sector-shaped region radially outward from the permanent magnet slots 103 in the direction of motor rotation, but the present invention is not limited to two magnetic barriers 106. The two magnetic barriers 106 are not connected to the permanent magnet slots 103, nor are they connected to the radially outer air gap of each sector-shaped region of the rotor core. On one side of the radial centerline of the permanent magnet 104 in the sector-shaped region, all magnetic barriers 106 are not connected to the permanent magnet slots 103, and all magnetic barriers 106 are not connected to the air gap radially outward from each sector-shaped region of the rotor core.

[0141] like Figure 13 As shown, when the motor rotates clockwise, two magnetic barriers 106 are provided in the rear half of the sector-shaped region radially outward from the permanent magnet slots 103 in the direction of motor rotation, but the present invention is not limited to two magnetic barriers 106. The two magnetic barriers 106 are not connected to the permanent magnet slots 103, nor are they connected to the radially outer air gap of each sector-shaped region of the rotor core. On one side of the radial centerline of the permanent magnet 104 in the sector-shaped region, all magnetic barriers 106 are not connected to the permanent magnet slots 103, and all magnetic barriers 106 are not connected to the air gap radially outward from each sector-shaped region of the rotor core.

[0142] like Figure 14As shown in FIG. 1, the motor rotates in a clockwise direction, and two magnetic barriers 106 are arranged in the rear half of each sector along the motor rotation direction radially outside the permanent magnet slot 103. However, the present application is not limited to two magnetic barriers 106. One of the magnetic barriers 106 is in communication with the permanent magnet slot 103, and one of the magnetic barriers 106 is in communication with the air gap radially outside each sector of the rotor core. At least one magnetic barrier 106 is in communication with the permanent magnet slot 103 and at least one magnetic barrier 106 is in communication with the air gap on one side of the radial center line of the sector permanent magnet 104.

[0143] As shown in FIG. 2, the motor rotates in a counterclockwise direction, and two magnetic barriers 106 are arranged in the rear half of each sector along the motor rotation direction radially outside the permanent magnet slot 103. However, the present application is not limited to two magnetic barriers 106. One of the magnetic barriers 106 is in communication with the permanent magnet slot 103, and one of the magnetic barriers 106 is in communication with the air gap radially outside each sector of the rotor core. At least one magnetic barrier 106 is in communication with the permanent magnet slot 103 and at least one magnetic barrier 106 is in communication with the air gap on one side of the radial center line of the sector permanent magnet 104. Figure 15 As shown in FIG. 3, the motor rotates in a clockwise direction, and two magnetic barriers 106 are arranged in the rear half of each sector along the motor rotation direction radially outside the permanent magnet slot 103. However, the present application is not limited to two magnetic barriers 106. Both of the magnetic barriers 106 are not in communication with the permanent magnet slot 103, and both of the magnetic barriers 106 are in communication with the air gap radially outside each sector of the rotor core. At least one magnetic barrier 106 is not in communication with the permanent magnet slot 103 and at least one magnetic barrier 106 is in communication with the air gap on one side of the radial center line of the sector permanent magnet 104.

[0144] Figure 16 As shown in FIG. 4, the motor rotates in a counterclockwise direction, and two magnetic barriers 106 are arranged in the rear half of each sector along the motor rotation direction radially outside the permanent magnet slot 103. However, the present application is not limited to two magnetic barriers 106. Both of the magnetic barriers 106 are not in communication with the permanent magnet slot 103, and both of the magnetic barriers 106 are in communication with the air gap radially outside each sector of the rotor core. At least one magnetic barrier 106 is not in communication with the permanent magnet slot 103 and at least one magnetic barrier 106 is in communication with the air gap on one side of the radial center line of the sector permanent magnet 104.

[0145] As shown in FIG. 5, the motor rotates in a clockwise direction, and two magnetic barriers 106 are arranged in the rear half of each sector along the motor rotation direction radially outside the permanent magnet slot 103. However, the present application is not limited to two magnetic barriers 106. Both of the magnetic barriers 106 are not in communication with the permanent magnet slot 103, and both of the magnetic barriers 106 are in communication with the air gap radially outside each sector of the rotor core. At least one magnetic barrier 106 is not in communication with the permanent magnet slot 103 and at least one magnetic barrier 106 is in communication with the air gap on one side of the radial center line of the sector permanent magnet 104. Figure 17 As shown in FIG. 6, the motor rotates in a counterclockwise direction, and two magnetic barriers 106 are arranged in the rear half of each sector along the motor rotation direction radially outside the permanent magnet slot 103. However, the present application is not limited to two magnetic barriers 106. Both of the magnetic barriers 106 are not in communication with the permanent magnet slot 103, and both of the magnetic barriers 106 are in communication with the air gap radially outside each sector of the rotor core. At least one magnetic barrier 106 is not in communication with the permanent magnet slot 103 and at least one magnetic barrier 106 is in communication with the air gap on one side of the radial center line of the sector permanent magnet 104.

[0146] Figure 18 ​​As shown in FIG. 1, the motor rotates in a counterclockwise direction, and two magnetic barriers 106 are arranged in the rear half of each sector along the motor rotation direction radially outside the permanent magnet slot 103. However, the present application is not limited to two magnetic barriers 106. Of the two magnetic barriers 106, one is in communication with the permanent magnet slot 103, and the other is not in communication with the air gap radially outside each sector of the rotor core. At least one magnetic barrier 106 is in communication with the permanent magnet slot 103 and at least one magnetic barrier 106 is not in communication with the air gap on one side of the sector permanent magnet 104 radially from the center line.

[0147] As shown in FIG. 2, the motor rotates in a clockwise direction, and two magnetic barriers 106 are arranged in the rear half of each sector along the motor rotation direction radially outside the permanent magnet slot 103. However, the present application is not limited to two magnetic barriers 106. Of the two magnetic barriers 106, one is in communication with the permanent magnet slot 103, and the other is not in communication with the air gap radially outside each sector of the rotor core. At least one magnetic barrier 106 is in communication with the permanent magnet slot 103 and at least one magnetic barrier 106 is not in communication with the air gap on one side of the sector permanent magnet 104 radially from the center line. Figure 19 In addition, in another embodiment, at least one end of the first slot segment 1062 and the second slot segment 1064 is limited to not be in communication, which can ensure the overall strength of the rotor structure. It can be understood that the magnetic barrier 106 is arranged on the rotor core, and if both ends are in communication, part of the rotor core will be directly cut off, and without other structures, it can be offset or collide. Therefore, by limiting at least one of the above two to not be in communication, the overall strength can be effectively improved.

[0148] Embodiment Five

[0149] As shown in FIG. 3, the motor structure 200 according to the present embodiment includes a stator 202 and a rotor structure 100, and the rotor structure 100 can rotate relative to the stator 202. The motor structure 200 includes the rotor structure 100 according to any one of the above embodiments, and thus has the beneficial effects of any one of the above embodiments, which will not be described here.

[0150] Figure 20 It should be emphasized that, since the motor structure 200 includes the rotor structure 100 described above, on the one hand, the motor's cross-axis armature reaction, magnetic saturation degree, and load back electromotive force can be effectively suppressed, and the motor's torque density and overload capacity can be improved. On the other hand, the rotor's magnetic field harmonics in the air gap 204 can be weakened, and the motor's torque ripple can be improved.

[0151] Embodiment Six

[0152] As shown in FIG. 4, the motor structure 200 according to the present embodiment includes a stator 202 and a rotor structure 100, and the rotor structure 100 can rotate relative to the stator 202. The motor structure 200 includes the rotor structure 100 according to any one of the above embodiments, and thus has the beneficial effects of any one of the above embodiments, which will not be described here.

[0153] As shown in FIG. 4, the motor structure 200 according to the present embodiment includes a stator 202 and a rotor structure 100, and the rotor structure 100 can rotate relative to the stator 202. The motor structure 200 includes the rotor structure 100 according to any one of the above embodiments, and thus has the beneficial effects of any one of the above embodiments, which will not be described here. Figure 21 ​As shown, the compressor 300 provided in the embodiment includes a shell 302 and a motor structure 200 arranged in the shell 302, the shell 302 is provided with the motor structure 200 in the above-mentioned embodiment five, thus having the beneficial effects of the motor structure 200, which will not be described herein again.

[0154] The application also provides a specific rotor, in order to inhibit motor cross-axis armature reaction, relieve core saturation, improve the torque density and overload capacity of the motor. The application provides a rotor and motor thereof, comprising a permanent magnet and a rotor core, wherein the rotor core comprises a plurality of permanent magnet grooves distributed along the axial direction, the permanent magnet is embedded in the permanent magnet groove, and the rotor core is divided into 2P fan-shaped regions by the permanent magnet groove. The rotor core is stacked by silicon steel sheets, and a magnetic barrier is arranged on one side of the permanent magnet radial center line in the fan-shaped region radially outside the permanent magnet groove. The two ends of the magnetic barrier point to the outer circle of the lamination of the rotor core and the permanent magnet groove respectively.

[0155] In order to inhibit motor cross-axis armature reaction, relieve core saturation, improve the torque density and overload capacity of the motor. The permanent magnet radial center line is orthogonal to the motor rotation direction, the fan-shaped region radially outside the permanent magnet groove is symmetrical about the permanent magnet radial center line, and the fan-shaped region radially outside the permanent magnet groove is divided into a front fan-shaped region and a rear fan-shaped region along the motor rotation direction, and the magnetic barrier is located in the rear fan-shaped region.

[0156] In order to not affect the permanent magnet flux linkage, while standardizing the magnetic line path, weakening the magnetic field harmonic in the air gap, and improving the torque ripple of the motor. The rotor and motor thereof, the extension direction of one end of the magnetic barrier pointing to the outer circle of the lamination of the rotor core is orthogonal or approximately orthogonal to the running direction of the rotor. Wherein, approximately orthogonal refers to the included angle range between 60° and 120°. The extension direction of one end of the magnetic barrier pointing to the permanent magnet groove has an included angle range of (180 / 2P)°-90° with the permanent magnet groove.

[0157] In order to effectively reduce the q-axis inductance when the magnetic barrier and the permanent magnet groove or the outer circle of the lamination of the rotor core are conductive, inhibit motor cross-axis armature reaction, and relieve core saturation; when the magnetic barrier and the permanent magnet groove or the outer circle of the lamination of the rotor core are not conductive, the structural strength of the rotor can be ensured. The rotor and motor thereof, each magnetic barrier and each fan-shaped region radially outside the permanent magnet groove and the rotor core have at least one unconnected air gap, or all magnetic barriers and each fan-shaped region radially outside the permanent magnet groove and the rotor core have all connected air gaps.

[0158] Both the structural strength of the rotor and the effective reduction of the q-axis inductance, the inhibition of motor cross-axis armature reaction, and the relief of core saturation are required. The rotor and motor thereof, when the magnetic barrier on the rotor core is in the unconnected state, the distance between the magnetic barrier and the permanent magnet groove or the outer surface of the rotor is d, and d≥0.2mm.

[0159] In order to make full use of the rotor inner core space and optimize the torque density, the shape of the permanent magnet slot is U-shaped, V-shaped or approximately semicircular.

[0160] According to one embodiment of the present application, one end of the magnetic barrier 106 points to the permanent magnet slot 103 and extends in a direction orthogonal or approximately orthogonal to the permanent magnet slot 103, and the other end points to the outer circle of the rotor core 102 and extends in a direction orthogonal or approximately orthogonal to the rotor running direction. Here, approximately orthogonal refers to an included angle range of 60°-120°.

[0161] The present application also provides a one-way rotating motor, which comprises a permanent magnet, a rotor and a stator core. The stator comprises a stator core and a stator winding, and a plurality of stator teeth are arranged on the stator core and distributed circumferentially around the center line of the stator core, and the stator winding is wound on the plurality of stator teeth. The rotor comprises a rotor core, which comprises a plurality of permanent magnet slots distributed radially and is divided into 2P fan-shaped regions by the permanent magnet slots.

[0162] According to one embodiment of the present application, all the magnetic barriers 106 on both sides of the permanent magnet slot 103 of each pole are not connected with the permanent magnet slot 103, and at least one magnetic barrier 106 on the radially outer side of each fan-shaped region of the rotor core 102 is connected with the air gap 204; or at least one magnetic barrier 106 on both sides of the permanent magnet slot 103 of each pole is connected with the permanent magnet slot 103, and all the magnetic barriers 106 on the radially outer side of each fan-shaped region of the rotor core 102 are not connected with the air gap 204.

[0163] If any one end of the magnetic barrier 106 on the rotor core 102 is in a non-connected state (not connected with the permanent magnet slot 103 and the air gap 204), the distance d between the end and the permanent magnet slot 103 or the outer circle surface of the rotor is greater than 0.2 mm.

[0164] In the specific embodiment, by designing a plurality of layers of magnetic barriers intersecting the rotor core 102 and using at least one relatively inexpensive permanent magnet material to design the permanent magnet 104, the overload capacity of the motor can be effectively improved, the torque ripple and cost of the motor can be reduced.

[0165] According to the rotor structure, the motor structure and the compressor provided by the present application, on the one hand, the position of the magnetic barrier can be set according to the limitation of the rotation direction of the rotor structure on the basis of inhibiting the cross-axis armature reaction of the motor, relieving the magnetic saturation degree and reducing the load back electromotive force, improving the torque density and overload capacity of the motor; on the other hand, the weight of the rotor core can also be reduced due to the hollowing of the magnetic barrier on the rotor core.

[0166] In the present application, the terms "first", "second", "third" are only used for descriptive purpose, and should not be understood as indicating or implying relative importance. The term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mount", "connect", "connection", "fix", and the like should be interpreted broadly, for example, "connection" can be fixed connection, or detachable connection, or integral connection; "connection" can be direct connection, or indirect connection through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0167] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or unit referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, should not be understood as a limitation on the present application.

[0168] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment", and the like, mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description 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.

[0169] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A rotor structure, characterized in that: include: A rotor core, wherein the rotor core is provided with a plurality of permanent magnet slots, and the plurality of permanent magnet slots are arranged around the circumference of the rotor core; a permanent magnet, disposed in the permanent magnet slot; A magnetic barrier is provided on the rotor core. Wherein, both ends of the permanent magnet slot face the outer edge of the rotor core, and both ends of the magnetic barrier face the outer edge of the permanent magnet and the rotor core respectively; The magnetic barrier specifically includes a first slot segment and a second slot segment; The first slot segment extends toward the permanent magnet slot; The second slot section is connected to the first slot section, and the second slot section extends toward the periphery of the rotor core; Among the multiple magnetic barriers located on the same side of the center line of the permanent magnet slot, at least two adjacent magnetic barriers have inconsistent connectivity between the first slot segments and the permanent magnet slot, and inconsistent connectivity between the second slot segments and the outer edge of the rotor core; The rotor core is divided into 2P sector-shaped areas by a plurality of the permanent magnet slots, where 2p is the number of the permanent magnet slots; Each of the sector-shaped areas radially outside the permanent magnet slot is provided with a magnetic barrier, and the magnetic barrier is symmetrical about the radial center line of the permanent magnet; The angle between the extension direction of the first slot segment and the extension direction of the permanent magnet slot is [(180° / 2P), 90°]; The included angle between the extending direction of the second slot segment and the rotation direction of the rotor core is [60°, 120°].

2. The rotor structure according to claim 1, characterized in that: Also includes: The magnetic barrier is provided between the permanent magnet slot and the outer edge of the rotor core.

3. The rotor structure according to claim 1, characterized in that: The permanent magnet slot includes at least one arc segment and / or at least one straight segment.

4. The rotor structure according to claim 3, characterized in that: The permanent magnet slot includes an arc segment and is U-shaped.

5. The rotor structure according to claim 3, characterized in that: The permanent magnet slot includes two straight line segments and is V-shaped.

6. The rotor structure according to claim 1, wherein: The extending direction of the first slot segment is the same as the extending direction of the second slot segment; or An extending direction of the first slot segment is different from an extending direction of the second slot segment.

7. The rotor structure according to any one of claims 1 to 6, characterized in that: The rotor core specifically comprises: Multiple stacked sheets, Wherein, each punching sheet is provided with an assembly opening, and a plurality of the assembly openings form the permanent magnet slot.

8. The rotor structure according to claim 7, characterized in that: The plurality of punching sheets form a plurality of core segments arranged along the axial direction, and the plurality of core segments are arranged along the axial direction of the rotor core to form the rotor core.

9. A motor structure, characterized in that: include: stator structure; The rotor structure according to any one of claims 1 to 8 is coaxially arranged with the stator structure, and the rotor structure is capable of rotating unidirectionally or bidirectionally relative to the stator structure.

10. The motor structure according to claim 9, characterized in that: The stator structure specifically includes: A stator core and a stator winding, wherein the stator core is provided with a plurality of stator teeth, the plurality of stator teeth are circumferentially distributed around the axis of the stator core, and the stator winding is wound on the stator teeth.

11. A compressor, characterized in that: include: case; The motor structure according to claim 9 or 10 is arranged in the housing.

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