Rotor structure, motor structure and laundry treatment device

Abstract

Embodiments of the present invention provide a rotor structure, a motor structure, and a laundry treatment apparatus. The rotor structure includes: a rotor core, on which a plurality of permanent magnet slots are provided, and the plurality of permanent magnet slots are arranged circumferentially around the rotor core; permanent magnets, disposed in the permanent magnet slots; magnetic barriers, disposed on the rotor core, and the rotor structure can rotate unidirectionally or bidirectionally in the circumferential direction. Along the rotation direction of the rotor structure, the magnetic barriers are disposed on at least one side of the permanent magnet slots, wherein two ends of each magnetic barrier face the permanent magnet and the outer edge of the rotor core respectively. In the technical solution of the present invention, on the one hand, based on the functions of suppressing the quadrature axis armature reaction of the motor, alleviating the degree of magnetic saturation, reducing the load back electromotive force, and improving the torque density and overload capacity of the motor, the position of the magnetic barrier can be set according to the limitation of the rotation direction of the rotor structure; on the other hand, since the magnetic barriers are formed by hollowing out the rotor core, the usage amount of rare earth permanent magnets can also be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of clothing treatment devices, and more particularly, to a rotor structure, an electric machine structure, and a clothing treatment device. Background Art

[0002] For a clothing treatment device, the performance of the electric machine provided inside it is an important factor determining the quality of use of the clothing treatment device. In the prior art, the requirements for the performance and cost performance of the electric machine are gradually increasing. For an electric machine, under the action of the cross-axis armature reaction, the magnetic saturation degree of the electric machine will be deepened, thus hindering the improvement of the electric machine performance. Summary of the Invention

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

[0004] In view of this, an embodiment of the first aspect of the present invention provides a rotor structure.

[0005] An embodiment of the second aspect of the present invention provides an electric machine structure.

[0006] An embodiment of the third aspect of the present invention provides a clothing treatment device.

[0007] To achieve the above object, an embodiment of the first aspect of the present invention provides a rotor structure, including: a rotor core, on which a plurality of permanent magnet slots are provided, and the plurality of permanent magnet slots are arranged circumferentially around the rotor core; permanent magnets, arranged in the permanent magnet slots; a magnetic barrier, arranged on the rotor core, and the rotor structure can rotate unidirectionally or bidirectionally in the circumferential direction. Along the rotation direction of the rotor structure, the magnetic barrier is arranged on at least one side of the permanent magnet slot, wherein both ends of the magnetic barrier respectively face the permanent magnet and the outer edge of the rotor core.

[0008] The rotor structure provided by the embodiment of the first aspect of the present invention includes a rotor core and permanent magnets arranged inside the rotor core, so as to be driven under the magnetic action of the permanent magnets. The rotor structure can rotate relative to the stator to realize the normal operation of the electric machine. Specifically, permanent magnet slots penetrating through two end faces are provided on the rotor core, and the permanent magnets can be arranged in the permanent magnet slots, which is convenient for the permanent magnets to be driven by magnetic force. A magnetic barrier is also provided on the rotor core. By defining the extending directions of both ends of the magnetic barrier to face the permanent magnet and the outer edge, the magnetic barrier can be used as a structure to relieve the magnetic saturation degree, form a magnetic barrier during the rotation of the rotor structure, so as to improve the power density and torque density of the electric machine, enhance the overload capacity of the electric machine, effectively improve the torque ripple of the electric machine, greatly improve the electric machine performance on the basis of reducing the permanent magnet consumption of the electric machine, that is, reducing the production cost, improve the cost performance of the electric machine applying the rotor structure, and improve the product competitiveness.

[0009] It should be emphasized that, due to the differences in the rotation direction of the rotor structure in this application being restricted by the motor, for example, it may be used in a unidirectional motor. Therefore, 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 on the basis of further reducing the processing cost.

[0010] Furthermore, in a specific embodiment, the magnetic barrier is only provided on one side of the permanent magnet slot. In another specific embodiment, the magnetic barrier is provided on both sides of the magnetization direction of the permanent magnet slot, that is, on the circumferential two sides of the rotor core.

[0011] According to the rotor structure of this solution, on the one hand, on the basis of suppressing the cross-axis armature reaction of the motor, alleviating the degree of magnetic saturation, reducing the load back electromotive force, and improving the torque density and overload capacity of the motor, the position of the magnetic barrier can be set according to the limitation of the rotation direction of the rotor structure; on the other hand, since the magnetic barrier is formed by hollowing out the rotor core, the usage amount of rare earth permanent magnets can also be reduced.

[0012] Among them, the number of permanent magnet slots can be multiple. Generally, multiple permanent magnet slots are evenly arranged around the axis of the rotor core.

[0013] Among them, the extending direction of the permanent magnet slot can be the axial direction of the rotor core, or can be a direction at a certain angle with the axial direction. Of course, considering the processing cost and processing difficulty, generally only the permanent magnet slot needs to be arranged axially and penetrate through the two end faces of the rotor core.

[0014] In addition, for the permanent magnet slot, it can be that at least one of the two ends penetrates the end face. For example, both ends penetrate, or one of the ends penetrates. It can also be that neither end penetrates the end face.

[0015] It can be understood that for the rotor core, the permanent magnet slot and the periphery of the rotor core are in two directions. Therefore, by restricting the two ends of the magnetic barrier to face the permanent magnet and the outer edge of the rotor core respectively, the magnetic barrier itself will bend to a certain extent.

[0016] In addition, the rotor structure in the above solution provided by the present invention can also have the following additional technical features:

[0017] In the above technical solution, the cross-section of the permanent magnet slot is polygonal, and the cross-section of the permanent magnet slot is a centrally symmetric structure.

[0018] In this technical solution, by restricting the cross-sectional shape of the permanent magnet slot to be polygonal, the polygonal permanent magnet slot can be more conducive to occupying the space of the rotor core, that is, it can make full use of the internal core space of the rotor and optimize the torque density.

[0019] In the above technical solution, the permanent magnet slot specifically includes a first slot portion, a second slot portion, and a third slot portion that are connected in the radial direction of the rotor core. Among them, the width of the first slot portion is less than or equal to the width of the second slot portion, and the width of the third slot portion is less than or equal to the width of the second slot portion.

[0020] In this technical solution, the polygonal permanent magnet slot mainly includes a first slot portion, a second slot portion, and a third slot portion, which are connected in sequence. The width of the middle second slot portion is relatively wide, and the first slot portion and the third slot portion on both sides are relatively narrow. On the basis of facilitating assembly, it is also convenient to meet the magnetization requirements.

[0021] Among them, the width is the dimension of the permanent magnet slot in the magnetization direction.

[0022] 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 on the front side of the permanent magnet slot.

[0023] In this technical solution, when the rotor structure rotates unidirectionally, in the rotation direction of the rotor structure, by restricting the magnetic barrier to be provided on the front side of the permanent magnet slot, that is, the magnetic barrier is provided on the weak magnetic side of the permanent magnet slot. When the rotor structure rotates, the permanent magnet will form a weak magnetic side and a strong magnetic side in the magnetization direction. By providing the magnetic barrier on the weak magnetic side of the permanent magnet slot, the suppression of the cross-axis armature reaction of the motor can be satisfied, so as to relieve the saturation degree of the rotor core.

[0024] It can be understood that the front side of the permanent magnet slot is the side that passes through a certain fixed position first during rotation. For example, when rotating in the clockwise direction, the entire rotor structure is divided into multiple fan-shaped structures. For each fan-shaped structure, if the permanent magnet slot is set at the six o'clock direction, the magnetic barrier will be set at the seven o'clock direction.

[0025] In the above technical solution, the magnetic barrier specifically includes: a first slot segment that extends toward the permanent magnet slot; a second slot segment that is connected to the first slot segment and extends toward the periphery of the rotor core.

[0026] In this technical solution, the magnetic barrier mainly includes two parts, namely the first slot segment and the second slot segment, which are connected. Among them, the opposite ends of the first slot segment and the second slot segment face the permanent magnet slot and the periphery of the rotor core respectively. The two parts of the magnetic barrier face structures in different positions, and the two parts need to be connected. The cross-axis armature reaction of the motor can be effectively suppressed under the combined action of the two parts, thereby relieving the effect of magnetic saturation.

[0027] In the above technical solution, on the cross-section of the rotor core, the rotor core is divided into 2P fan-shaped regions by a plurality of permanent magnet slots, and the included angle between the extending direction of the first slot section and the extending direction of the permanent magnet slots is [(180° / 2P), 90°]; on the cross-section of the rotor core, the included angle between the extending direction of the second slot section and the rotating direction of the rotor core is [60°, 120°].

[0028] In this technical solution, by restricting the extending directions of the first slot section and the second slot section, the cross-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, so as 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. Specifically, the cross-section of the rotor core is the normal plane of the axis of the rotor core. On this cross-section, the included angle between the extending direction of the first slot section and the extending direction of the permanent magnet slots is greater than or equal to (180° / 2P) and less than or equal to 90°, where 2p is the number of fan-shaped regions. When the shape of the cross-section of the rotor core is circular, 2p is also the number of permanent magnet slots. Additionally, on this cross-section, the extending direction of the second slot section and the rotating direction of the rotor core can be orthogonal or approximately orthogonal, and specifically, the angle range between the two can be greater than or equal to 60° and less than or equal to 120°.

[0029] In the above technical solution, the end of the first slot section far from the second slot section is connected to the permanent magnet slot.

[0030] In this technical solution, by restricting the end of the first slot section facing the permanent magnet slot from being directly connected to the permanent magnet slot, during processing, it can be directly cut into the rotor core from the side of the permanent magnet slot, which is convenient for processing. Structurally, the first slot section is directly connected to the permanent magnet slot to achieve the effect of suppressing the cross-axis armature reaction of the motor.

[0031] In the above technical solution, there is a first distance between the end of the first slot section far from the second slot section and the permanent magnet slot.

[0032] In this technical solution, by restricting the end of the first slot section facing the permanent magnet slot from being connected to the permanent magnet slot, that is, there is a certain distance between the two. For the overall magnetic barrier, one end of it is a closed structure. Structurally, there is a certain interval between the first slot section and the permanent magnet slot, and the effect of suppressing the cross-axis armature reaction of the motor can also be achieved.

[0033] In the above technical solution, the first distance is greater than or equal to 0.2 mm.

[0034] In this technical solution, when the first slot section 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 as to ensure the structural strength of the rotor core between the first slot section and the permanent magnet slot during the processing of the rotor core.

[0035] In the above technical solution, one end of the second slot section far from the first slot section is connected to the periphery of the rotor core.

[0036] In this technical solution, by restricting the end of the second slot section facing the periphery from being directly connected to the periphery, during machining, it can be directly cut into from the outside of the rotor core, which is convenient for machining. In terms of structure, the second slot section is directly connected to the periphery to achieve the effect of suppressing the cross-axis armature reaction of the motor.

[0037] In the above technical solution, there is a second distance between one end of the second slot section far from the first slot section and the periphery of the rotor core.

[0038] In this technical solution, by restricting the non-connection between the end of the second slot section facing the periphery and the periphery, that is, there is a certain distance between the two. For the overall magnetic barrier, one end is a closed structure. In terms of structure, there is a certain interval between the second slot section and the periphery, which can also achieve the effect of suppressing the cross-axis armature reaction of the motor.

[0039] In the above technical solution, the second distance is greater than or equal to 0.2 mm.

[0040] In this technical solution, when the second slot section is not connected to the periphery, the distance 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 machining the rotor core.

[0041] In the above technical solution, among multiple magnetic barriers corresponding to the same permanent magnet, the connection relationship between the first slot section and the permanent magnet slot is the same, and the connection relationship between the second slot section and the outer edge of the rotor core is the same.

[0042] In this technical solution, for multiple magnetic barriers corresponding to the same permanent magnet slot, by restricting the connection relationships between the first slot section and the second slot section and the permanent magnet slot and the outer edge of the rotor core respectively to be the same, it is convenient to improve the machining efficiency.

[0043] In the above technical solution, among multiple magnetic barriers corresponding to the same permanent magnet, the connection relationships between the first slot sections of at least two adjacent magnetic barriers and the permanent magnet slot are different, and the connection relationships between the second slot sections and the outer edges of the rotor core are different.

[0044] In this technical solution, for multiple magnetic barriers correspondingly arranged for the same permanent magnet slot, the connection relationship between the first slot section and the second slot section is staggered. It can be understood that if the first slot section is connected to the permanent magnet slot, it will have a relatively large armature suppression effect. However, due to the direct break design, it will have a certain impact on the strength. If the first slot section is not connected to the permanent magnet slot, it will have a certain strength, but for the armature suppression effect, it will be slightly weaker. The same is true for the connection relationship between the second slot section and the outer edge. Through the staggered connection relationship, the armature suppression effect and strength can be comprehensively improved, and the feasibility of using the rotor structure can be enhanced.

[0045] In the above technical solution, among multiple magnetic barriers correspondingly arranged for the same permanent magnet, at least one magnetic barrier has its first slot section not connected to the permanent magnet slot, and its second slot section not connected to the outer edge of the rotor core.

[0046] In this technical solution, for multiple magnetic barriers correspondingly arranged for the same permanent magnet slot, by restricting the first slot section and the second slot section of the magnetic barrier from being connected to the permanent magnet slot and the outer edge respectively, it can be understood that since both ends are not connected, the structural strength of the rotor core during operation can be effectively improved, thereby enhancing the overall stability of the rotor structure during rotation.

[0047] In the above technical solution, the first slot section is linear, the second slot section is linear, and the included angle between the first slot section and the second slot section is [60°, 120°].

[0048] In this technical solution, both the first slot section and the second slot section are straight line segments, which are convenient for processing. Moreover, by restricting the included angle between the two straight line segments, it is more conducive to the suppression effect on the cross-axis armature reaction.

[0049] In another embodiment, it is also possible to restrict one of the first slot section and the second slot section to be curved, or both of them to be curved.

[0050] In the above technical solution, the rotor core specifically includes: multiple laminally arranged punching sheets, where each punching sheet is provided with an assembly opening, and multiple assembly openings form a permanent magnet slot.

[0051] In this technical solution, for the convenience of processing, the rotor core is mainly composed of multiple punching sheets. The rotor core can be formed by laminally assembling multiple punching sheets. It should be noted that during processing, the assembly openings can be separately processed on each punching sheet, and then after assembly, multiple assembly openings can form a permanent magnet slot for accommodating the permanent magnet, which is conducive to realizing the rotation of the rotor structure.

[0052] In the above technical solution, multiple punching sheets form multiple iron core segments arranged axially, and multiple iron core segments are arranged axially along the rotor core to form the rotor core.

[0053] In this technical solution, the stacked punching sheets are divided into multiple segments, each segment is composed of a plurality of punching sheets, and the multiple iron core segments are arranged axially to form a rotor core, so as to realize the electromagnetic effect of the rotor in the motor.

[0054] An embodiment of the second aspect of the present invention provides a motor structure, including: a stator; a rotor structure as in the technical solution of the first aspect above, coaxially arranged with the stator, and the rotor structure can rotate relative to the stator.

[0055] According to the motor structure provided by the embodiment of the second aspect of the present invention, which includes a stator and a rotor structure, wherein the rotor structure in the technical solution of the first aspect above is provided in the motor structure, so it has the beneficial effects of any of the above rotor structures, which will not be elaborated here.

[0056] It should be emphasized that since the motor structure includes the above rotor structure, on the one hand, it effectively suppresses the cross-axis armature reaction of the motor, alleviates the degree of magnetic saturation and reduces the load back electromotive force, improving the torque density and overload capacity of the motor; on the other hand, it can also weaken the magnetic field harmonics of the rotor in the air gap and improve the torque ripple of the motor.

[0057] An embodiment of the third aspect of the present invention provides a laundry treatment device, including: a housing; a motor structure as in the technical solution of the second aspect above, provided in the housing.

[0058] According to the laundry treatment device provided by the embodiment of the third aspect of the present invention, which includes a housing and a motor structure provided in the housing, the motor structure in the technical solution of the second aspect above is provided in the outdoor unit, so it has the beneficial effects of the above motor structure, which will not be elaborated here.

[0059] The additional aspects and advantages of the present invention will become apparent in the following description section or be learned through the practice of the present invention. Description of the Drawings

[0060] Figure 1 Shows a schematic structural diagram of a rotor structure according to an embodiment of the present invention;

[0061] Figure 2 Shows a schematic structural diagram of a rotor structure according to an embodiment of the present invention;

[0062] Figure 3 Shows Figure 2 A partial enlarged schematic view of part A of

[0063] Figure 4 Shows Figure 2 A partial enlarged schematic view of part B of

[0064] Figure 5 Shows a schematic structural diagram of a part of the punching sheet according to an embodiment of the present invention;

[0065] Figure 6 Shows a schematic structural diagram of a rotor structure according to an embodiment of the present invention;

[0066] Figure 7 Shows a schematic structural diagram of a rotor structure according to an embodiment of the present invention;

[0067] Figure 8 Shows a schematic structural diagram of a rotor structure according to an embodiment of the present invention;

[0068] Figure 9 Shows a schematic structural diagram of a rotor structure according to an embodiment of the present invention;

[0069] Figure 10 Shows a schematic structural diagram of a rotor structure according to an embodiment of the present invention;

[0070] Figure 11 Shows a schematic structural diagram of a rotor structure according to an embodiment of the present invention;

[0071] Figure 12 Shows a schematic structural diagram of a rotor structure according to an embodiment of the present invention;

[0072] Figure 13 Shows a schematic structural diagram of a rotor structure according to an embodiment of the present invention;

[0073] Figure 14 Shows a schematic structural diagram of a rotor structure according to an embodiment of the present invention;

[0074] Figure 15 Shows Figure 14 A partial enlarged schematic diagram of part C therein;

[0075] Figure 16 Shows Figure 14 A partial enlarged schematic diagram of part D therein;

[0076] Figure 17 Shows a schematic structural diagram of a rotor structure according to an embodiment of the present invention;

[0077] Figure 18 Shows a schematic structural diagram of a rotor structure according to an embodiment of the present invention;

[0078] Figure 19 Shows a schematic structural diagram of a rotor structure according to an embodiment of the present invention;

[0079] Figure 20 Shows a schematic structural diagram of a rotor structure according to an embodiment of the present invention;

[0080] Figure 21 shows a structural schematic diagram of a motor structure according to an embodiment of the present invention;

[0081] Figure 22 shows a structural schematic diagram of a motor structure according to an embodiment of the present invention;

[0082] Figure 23 shows a structural schematic diagram of a laundry treatment apparatus according to an embodiment of the present invention.

[0083] Wherein, Figures 1 to 23 the correspondence between the reference numerals and the component names in the figure is as follows:

[0084] 100: rotor structure; 102: rotor core; 1022: punching sheet; 1024: assembly port; 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: laundry treatment apparatus; 302: housing. Detailed Description of the Invention

[0085] In order to more clearly understand the above objects, features and advantages of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0086] In the following description, many specific details are set forth in order to fully understand 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 limitations of the specific embodiments disclosed below.

[0087] The following refers to Figures 1 to 23 describe some embodiments of the present invention.

[0088] Embodiment 1

[0089] As Figures 1 to 5As shown, a rotor structure 100 proposed in this embodiment includes a rotor core and a permanent magnet disposed within the rotor core so as to be driven under the magnetic action of the permanent magnet. The rotor structure can rotate relative to the stator to enable the normal operation of the motor. Specifically, permanent magnet slots penetrating through two end faces are provided on the rotor core, and the permanent magnets can be disposed within the permanent magnet slots, facilitating the driving of the permanent magnets by magnetic force. A magnetic barrier is further provided on the rotor core. By defining the extending directions at both ends of the magnetic barrier to be towards the permanent magnet and the outer edge, the magnetic barrier can be used as a structure to alleviate the degree of magnetic saturation, forming a magnetic barrier during the rotation of the rotor structure, thereby improving the power density and torque density of the motor, enhancing the overload capacity of the motor, effectively improving the torque ripple of the motor, and greatly improving the motor performance while reducing the permanent magnet usage of the motor, that is, reducing the production cost, improving the cost performance of the motor using the rotor structure, and enhancing the product competitiveness.

[0090] It should be particularly emphasized that since the rotation direction of the rotor structure in this application is restricted by the motor and there are differences, for example, it may be used in a unidirectional motor. Therefore, 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 on the basis of further reducing the processing cost.

[0091] Furthermore, in a specific embodiment, as Figures 12 to 20 shown, the magnetic barrier is only provided on one side of the permanent magnet slot. Further, by providing the magnetic barrier on the weak magnetic side of the permanent magnet slot, it can be understood that when the rotor structure rotates, a weak magnetic side and a strong magnetic side will be formed in the magnetization direction of the permanent magnet, which can satisfy the suppression of the cross-axis armature reaction of the motor to alleviate the saturation degree of the rotor core.

[0092] Specifically, in the case of the unidirectional rotation of the rotor structure, in the rotation direction of the rotor structure, by restricting the magnetic barrier to be provided on the front side of the permanent magnet slot, that is, the magnetic barrier is provided on the weak magnetic side of the permanent magnet slot. When the rotor structure rotates, a weak magnetic side and a strong magnetic side will be formed in the magnetization direction of the permanent magnet. By providing the magnetic barrier on the weak magnetic side of the permanent magnet slot, the suppression of the cross-axis armature reaction of the motor can be satisfied to alleviate the saturation degree of the rotor core.

[0093] It can be understood that the front side of the permanent magnet slot is the side that first passes through a certain fixed position during rotation. For example, when rotating in the clockwise direction, the entire rotor structure is divided into multiple fan-shaped structures. For each fan-shaped structure, if the permanent magnet slot is provided at the six o'clock direction, the magnetic barrier will be provided at the seven o'clock direction.

[0094] In another specific embodiment, as Figure 1 shown, the magnetic barrier is provided on both sides in the magnetization direction of the permanent magnet slot, that is, on both circumferential sides of the rotor core.

[0095] According to the rotor structure 100 of this solution, on the one hand, it effectively suppresses the quadrature-axis armature reaction of the motor, alleviates the degree of magnetic saturation, reduces the load back electromotive force, and improves the torque density and overload capacity of the motor; on the other hand, since the magnetic barrier 106 is formed by hollowing out the rotor core 102, the amount of rare earth permanent magnets 104 can also be reduced.

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

[0097] Among them, the extending direction of the permanent magnet slot 103 can be the axial direction of the rotor core 102, or can be a direction at a certain angle with the axial direction. Of course, considering the processing cost and processing difficulty, generally, it is only necessary to arrange the permanent magnet slot 103 along the axial direction and penetrate the two end faces of the rotor core 102.

[0098] 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 of the ends penetrates. It can also be that neither of the two ends penetrates the end face.

[0099] It can be understood that for the rotor core 102, the permanent magnet slot 103 and the periphery of the rotor core 102 are in two directions. Therefore, by restricting 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 bend to a certain extent.

[0100] Furthermore, for the convenience of processing, the rotor core 102 is mainly composed of multiple punching sheets 1022. The rotor core 102 can be formed by stacking and assembling multiple punching sheets 1022. It should be noted that during processing, the assembly ports 1024 can be processed separately on each punching sheet 1022. Then, after assembly, multiple assembly ports 1024 can form the permanent magnet slots 103 for accommodating the permanent magnets 104, which is conducive to realizing the rotation of the rotor structure 100.

[0101] Furthermore, the rotor core can be an integral structure or a multi-segment structure. Specifically, if it is a multi-segment structure, it can be realized by dividing the stacked punching sheets into multiple segments, and each segment is composed of multiple punching sheets. The multi-segment iron core segments are arranged axially to form the rotor core to realize the electromagnetic effect of the rotor in the motor.

[0102] 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 fan-shaped regions. It can be understood that the permanent magnet slots 103 will be evenly arranged around the axis on the rotor core 102, and each fan-shaped region has a permanent magnet slot 103 on both circumferential sides. On the one hand, it is convenient for the installation of the permanent magnet 104, and on the other hand, it is also beneficial to the overall processing and assembly.

[0103] Embodiment Two

[0104] As Figures 1 to 5 shown, a rotor structure 100 proposed in this embodiment includes a rotor core 102 and a permanent magnet 104 arranged inside 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 the normal operation of the motor. Specifically, permanent magnet slots 103 penetrating two end faces are provided on the rotor core 102, and the permanent magnet 104 can be arranged in the permanent magnet slots 103, which is convenient for the permanent magnet 104 to be driven by magnetic force. A magnetic barrier 106 is also provided on the rotor core 102. By defining the extending directions at 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 relieve the degree of magnetic saturation, form a magnetic barrier during the rotation of the rotor structure 100, improve the power density and torque density of the motor, enhance the overload capacity of the motor, effectively improve the torque ripple of the motor, and greatly improve the motor performance on the basis of reducing the permanent magnet usage of the motor, that is, reducing the production cost, improving the cost performance of the motor using the rotor structure 100, and enhancing the product competitiveness.

[0105] According to the rotor structure 100 of this solution, on the one hand, it effectively suppresses the cross-axis armature reaction of the motor, relieves the degree of magnetic saturation and reduces the load back electromotive force, and improves the torque density and overload capacity of the motor; on the other hand, since the magnetic barrier 106 is formed by hollowing out the rotor core 102, the usage of the rare earth permanent magnet 104 can also be reduced.

[0106] Among them, the number of the permanent magnet slots 103 can be multiple. Generally, multiple permanent magnet slots 103 are evenly arranged around the axis of the rotor core 102.

[0107] Among them, the extending direction of the permanent magnet slot 103 can be the axial direction of the rotor core 102, or a direction at a certain angle with the axial direction. Of course, considering the processing cost and processing difficulty, generally only the permanent magnet slot 103 needs to be arranged along the axial direction and penetrate the two end faces of the rotor core 102.

[0108] It can be understood that for the rotor core 102, the permanent magnet slots 103 and the periphery of the rotor core 102 are in two directions. Therefore, by restricting 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 bend to a certain extent.

[0109] Among them, the magnetic barrier 106 mainly includes two parts, namely the first slot section 1062 and the second slot section 1064. The first slot section 1062 and the second slot section 1064 are connected. Among them, the ends of the first slot section 1062 and the second slot section 1064 facing away from each other face the permanent magnet slot 103 and the periphery of the rotor core 102 respectively. The two parts of the magnetic barrier 106 face different positions, and the two parts need to be connected. The cross-axis armature reaction of the motor can be effectively suppressed under the combined action of the two parts, thereby alleviating the degree of magnetic saturation.

[0110] Furthermore, the extension directions of the first slot section 1062 and the second slot section 1064 are also restricted, which can effectively suppress the cross-axis armature reaction of the motor and alleviate the magnetic saturation degree under the action of the magnetic barrier, so as 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. Specifically, the cross-section of the rotor core 102 is the normal plane of the axis of the rotor core 102. On this cross-section, the rotor core is divided into 2P fan-shaped regions by a 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, on this 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, and the specific angle range between the two can be [60°, 120°].

[0111] In a specific embodiment, the first slot section 1062 and the second slot section 1064 are connected. By restricting the transition between the first slot section 1062 and the second slot section 1064 to be relatively smooth, the processing difficulty and processing cost can be reduced.

[0112] 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, it can also be an arc transition.

[0113] In a specific embodiment, the cross-section of the permanent magnet slot is polygonal. The polygonal permanent magnet slot can make better use of the space of the rotor core, that is, it can make full use of the internal core space of the rotor, 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 of the polygon presents a narrow-wide-narrow structure. The width of the narrow part is w1, and the width of the wide part is w2, and their relationship satisfies w2≥w1.

[0114] Embodiment III

[0115] As Figures 1 to 5 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 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 achieve the normal operation of the motor. Specifically, a permanent magnet groove 103 penetrating through two end faces is provided on the rotor core 102, and the permanent magnet 104 can be disposed within the permanent magnet groove 103, which facilitates the driving of the permanent magnet 104 by magnetic force. A magnetic barrier 106 is also provided on the rotor core 102. By defining the extending directions 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 for alleviating the degree of magnetic saturation, forming a magnetic barrier during the rotation of the rotor structure 100, so as to improve the power density and torque density of the motor, enhance the overload capacity of the motor, effectively improve the torque ripple of the motor, and greatly improve the motor performance on the basis of reducing the permanent magnet usage of the motor, that is, reducing the production cost, improving the cost performance of the motor applying the rotor structure 100, and enhancing the product competitiveness.

[0116] Among them, the magnetic barrier 106 mainly includes two parts, namely a first groove section 1062 and a second groove section 1064. The first groove section 1062 and the second groove section 1064 are connected. Among them, the ends of the first groove section 1062 and the second groove section 1064 facing away from each other are respectively towards the permanent magnet groove 103 and the periphery of the rotor core 102. The two parts of the magnetic barrier 106 face structures at different positions, and the two parts need to be connected. The cross-axis armature reaction of the motor can be effectively suppressed under the combined action of the two parts, thereby achieving the effect of alleviating the degree of magnetic saturation.

[0117] For the first groove section 1062, in one embodiment, the end of the first groove section 1062 facing the permanent magnet groove 103 is directly connected to the permanent magnet groove 103. During processing, it can be directly cut into the rotor core 102 from the side of the permanent magnet groove 103, which is convenient for processing. In terms of structure, the first groove section 1062 is directly connected to the permanent magnet groove 103 to achieve the effect of suppressing the cross-axis armature reaction of the motor.

[0118] In another embodiment, the end of the first groove section 1062 facing the permanent magnet groove 103 is not connected to the permanent magnet groove 103, that is, there is a certain distance between the two. For the overall magnetic barrier 106, one end thereof is a closed structure. In terms of structure, there is a certain interval between the first groove section 1062 and the permanent magnet groove 103, which can also achieve the effect of suppressing the cross-axis armature reaction of the motor.

[0119] Among them, the first distance between the first groove section 1062 and the permanent magnet groove 103 is greater than or equal to 0.2 mm.

[0120] For the second slot section 1064, in one embodiment, one end of the second slot section 1064 facing the periphery is directly connected to the periphery. During processing, it can be directly cut and extended from the outside of the rotor core 102, which is convenient for processing. Structurally, the second slot section 1064 is directly connected to the periphery to achieve the effect of suppressing the quadrature-axis armature reaction of the motor.

[0121] In another embodiment, there is no connection between one end of the second slot section 1064 facing the periphery and the periphery, that is, there is a certain distance between the two. For the magnetic barrier 106 as a whole, one end is a closed structure. Structurally, there is a certain interval between the second slot section 1064 and the periphery, and the effect of suppressing the quadrature-axis armature reaction of the motor can also be achieved.

[0122] Wherein, the second distance between the second slot section 1064 and the periphery is greater than or equal to 0.2 mm.

[0123] It should be emphasized that there are four combinations of the connection relationships between the first slot section 1062 and the second slot section 1064 and the permanent magnet slot 103 and the periphery respectively, specifically: the first slot section 1062 is connected and the second slot section 1064 is not connected; the first slot section 1062 is connected and the second slot section 1064 is connected; the first slot section 1062 is not connected and the second slot section 1064 is connected; the first slot section 1062 is not connected and the second slot section 1064 is not connected.

[0124] Wherein, when connected, the q-axis inductance can be effectively reduced, the quadrature-axis armature reaction of the motor can be suppressed, and the core saturation can be alleviated. When not connected, the structural strength of the rotor can be ensured.

[0125] There are multiple permanent magnet slots 103 provided on the rotor core 102, and the connection relationships of the first slot section 1062 and the second slot section 1064 of each permanent magnet slot 103 are independent, so they can be flexibly selected and set according to actual needs.

[0126] In a specific embodiment, among the multiple magnetic barriers correspondingly arranged for the same permanent magnet, the connection relationship between the first slot section and the permanent magnet slot is the same, and the connection relationship between the second slot section and the outer edge of the rotor core is the same. For the multiple magnetic barriers correspondingly arranged for the same permanent magnet slot, by restricting the connection relationships between the first slot section and the second slot section and the permanent magnet slot and the outer edge of the rotor core to be the same, the processing efficiency can be improved.

[0127] In a specific embodiment, among multiple magnetic barriers correspondingly arranged for the same permanent magnet, the communication relationships between the first slot segments of at least two adjacent magnetic barriers and the permanent magnet slot are inconsistent, and the communication relationships between the second slot segments and the outer edge of the rotor core are inconsistent. For multiple magnetic barriers correspondingly arranged for the same permanent magnet slot, the communication relationships of the first slot segments and the second slot segments are staggered. It can be understood that if the first slot segment is in communication with the permanent magnet slot, a relatively large armature suppression effect will be achieved, but due to the direct break design, the strength will be affected to a certain extent. If the first slot segment is not in communication with the permanent magnet slot, a certain strength will be obtained, but for the armature suppression effect, it will be slightly weaker. The same applies to the communication relationship between the second slot segment and the outer edge. Through the staggered communication relationships, the armature suppression effect and strength can be comprehensively improved, and the feasibility of using the rotor structure can be enhanced.

[0128] In a specific embodiment, among multiple magnetic barriers correspondingly arranged for the same permanent magnet, there is at least one magnetic barrier whose first slot segment is not in communication with the permanent magnet slot, and the second slot segment is not in communication with the outer edge of the rotor core. For multiple magnetic barriers correspondingly arranged for the same permanent magnet slot, by restricting the first slot segment and the second slot segment of the magnetic barrier from being in communication with the permanent magnet slot 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 enhancing the overall stability of the rotor structure during rotation.

[0129] In a specific embodiment, both the first slot segment and the second slot segment are straight line segments, which are convenient for processing. By restricting the angle between the two straight line segments to be within [60°, 120°], it is more conducive to the suppression effect on the cross-axis armature reaction.

[0130] In another embodiment, it is also possible to restrict one of the first slot segment and the second slot segment to be curved, or both to be curved.

[0131] Embodiment 4

[0132] Such as Figures 1 to 5As 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, so as to be driven under the magnetic action of the permanent magnet 104. The rotor structure 100 can rotate relative to a stator 202 to achieve the normal operation of the motor. Specifically, a permanent magnet slot 103 penetrating both end faces is provided on the rotor core 102, and the permanent magnet 104 can be disposed within the permanent magnet slot 103, which facilitates the driving of the permanent magnet 104 by magnetic force. A magnetic barrier 106 is also provided on the rotor core 102. By defining the extending directions 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 relieve the degree of magnetic saturation, forming a magnetic barrier during the rotation of the rotor structure 100, so as to improve the power density and torque density of the motor, enhance the overload capacity of the motor, effectively improve the torque ripple of the motor, and greatly improve the motor performance on the basis of reducing the permanent magnet usage of the motor, that is, reducing the production cost, improving the cost performance of the motor applying the rotor structure 100, and enhancing the product competitiveness.

[0133] For the rotor structure 100 according to this solution, on the one hand, it effectively suppresses the cross-axis armature reaction of the motor, relieves the degree of magnetic saturation and reduces the load back electromotive force, enhancing the torque density and overload capacity of the motor; on the other hand, since a magnetic barrier 106 is formed by hollowing out the rotor core 102, the usage of rare earth permanent magnets 104 can also be reduced.

[0134] For a structure with magnetic barriers provided on both sides in the magnetization direction, there are various connection methods at both ends of the magnetic barrier, specifically as Figure 1 and Figures 6 to 11 shown.

[0135] As Figure 1 shown, there are three magnetic barriers on both sides of the permanent magnet slot respectively, but the present invention is not limited to three magnetic barriers. Among them, the three magnetic barriers are not connected to the permanent magnet slot, and the three magnetic barriers are not connected to the radial outer air gap of each sector area of the rotor core respectively. All magnetic barriers on both sides of each permanent magnet slot are not connected to the permanent magnet slot, and all magnetic barriers on the radial outer side of each sector area of the rotor core are not connected to the air gap.

[0136] As Figure 6 shown, there are three magnetic barriers on both sides of the permanent magnet slot respectively, but the present invention is not limited to three magnetic barriers. One of the magnetic barriers is connected to the permanent magnet slot, and two magnetic barriers are connected to the radial outer air gap of each sector area of the rotor core. On both sides of each permanent magnet slot, at least one magnetic barrier is connected to the permanent magnet slot respectively, and on the radial outer side of each sector area of the rotor core, at least one magnetic barrier is connected to the air gap.

[0137] As Figure 7As shown, there are three magnetic barriers on each side of the permanent magnet slot, but the present invention is not limited to three magnetic barriers. Two of the magnetic barriers communicate with the permanent magnet slot, and one magnetic barrier communicates with the air gap on the radial outer side of each sector area of the rotor core. On each side of each permanent magnet slot, there is at least one magnetic barrier communicating with the permanent magnet slot, and on the radial outer side of each sector area of the rotor core, there is at least one magnetic barrier communicating with the air gap.

[0138] As Figure 8 shown, there are three magnetic barriers on each side of the permanent magnet slot, but the present invention is not limited to three magnetic barriers. One of the magnetic barriers communicates with the permanent magnet slot, and two magnetic barriers communicate with the air gap on the radial outer side of each sector area of the rotor core. On each side of each permanent magnet slot, there is at least one magnetic barrier communicating with the permanent magnet slot, and on the radial outer side of each sector area of the rotor core, there is at least one magnetic barrier communicating with the air gap.

[0139] As Figure 9 shown, there are three magnetic barriers on each side of the permanent magnet slot, but the present invention is not limited to three magnetic barriers. Three of the magnetic barriers communicate with the permanent magnet slot, and three magnetic barriers communicate with the air gap on the radial outer side of each sector area of the rotor core. On each side of each permanent magnet slot, there is at least one magnetic barrier communicating with the permanent magnet slot, and on the radial outer side of each sector area of the rotor core, there is at least one magnetic barrier communicating with the air gap.

[0140] As Figure 10 shown, there are three magnetic barriers on each side of the permanent magnet slot, but the present invention is not limited to three magnetic barriers. Three of the magnetic barriers do not communicate with the permanent magnet slot, and three magnetic barriers communicate with the air gap on the radial outer side of each sector area of the rotor core. On each side of each permanent magnet slot, there is at least one magnetic barrier not communicating with the permanent magnet slot, and on the radial outer side of each sector area of the rotor core, there is at least one magnetic barrier communicating with the air gap.

[0141] As Figure 11 shown, there are three magnetic barriers on each side of the permanent magnet slot, but the present invention is not limited to three magnetic barriers. Three of the magnetic barriers communicate with the permanent magnet slot, and three magnetic barriers do not communicate with the air gap on the radial outer side of each sector area of the rotor core. On each side of each permanent magnet slot, there is at least one magnetic barrier communicating with the permanent magnet slot, and on the radial outer side of each sector area of the rotor core, there is at least one magnetic barrier not communicating with the air gap.

[0142] In addition, for the structure with magnetic barriers only arranged on the weak magnetic side in the magnetization direction, the connection modes at both ends of the magnetic barriers are also diversified.

[0143] As Figure 12As shown, the motor rotates counterclockwise. There are three magnetic barriers arranged along the side of the permanent magnet slot in the counterclockwise rotation direction of the motor. The present invention is not limited to three magnetic barriers. Among them, the three magnetic barriers are not connected to the permanent magnet slot, and the three magnetic barriers are not connected to the air gap on the radial outer side of each sector area of the rotor core. All magnetic barriers on both sides of each permanent magnet slot are not connected to the permanent magnet slot, and on the radial outer side of each sector area of the rotor core, all magnetic barriers are not connected to the air gap.

[0144] As Figure 13 shown, the motor rotates clockwise. There are three magnetic barriers arranged along the side of the permanent magnet slot in the clockwise rotation direction of the motor. The present invention is not limited to three magnetic barriers. Among them, the three magnetic barriers are not connected to the permanent magnet slot, and the three magnetic barriers are not connected to the air gap on the radial outer side of each sector area of the rotor core. All magnetic barriers on both sides of each permanent magnet slot are not connected to the permanent magnet slot, and on the radial outer side of each sector area of the rotor core, all magnetic barriers are not connected to the air gap.

[0145] As Figure 17 shown, the motor rotates counterclockwise. There are three magnetic barriers arranged along the side of the permanent magnet slot in the counterclockwise rotation direction of the motor. The present invention is not limited to three magnetic barriers. Among them, one magnetic barrier is connected to the permanent magnet slot, and two magnetic barriers are not connected to the air gap on the radial outer side of each sector area of the rotor core. At least one magnetic barrier is connected to the permanent magnet slot, and on the radial outer side of each sector area of the rotor core, at least one magnetic barrier is connected to the air gap.

[0146] As Figure 18 shown, the motor rotates clockwise. There are three magnetic barriers arranged along the side of the permanent magnet slot in the counterclockwise rotation direction of the motor. The present invention is not limited to three magnetic barriers. Among them, one magnetic barrier is connected to the permanent magnet slot, and two magnetic barriers are not connected to the air gap on the radial outer side of each sector area of the rotor core. At least one magnetic barrier is connected to the permanent magnet slot, and on the radial outer side of each sector area of the rotor core, at least one magnetic barrier is connected to the air gap.

[0147] As Figure 19 shown, the motor rotates counterclockwise. There are three magnetic barriers arranged along the side of the permanent magnet slot in the counterclockwise rotation direction of the motor. The present invention is not limited to three magnetic barriers. Among them, the three magnetic barriers are not connected to the permanent magnet slot, and the three magnetic barriers are connected to the air gap on the radial outer side of each sector area of the rotor core. Respectively, at least one magnetic barrier is connected to the permanent magnet slot, and on the radial outer side of each sector area of the rotor core, at least one magnetic barrier is not connected to the air gap; or on both sides of each permanent magnet slot, respectively, at least one magnetic barrier is not connected to the permanent magnet slot, and on the radial outer side of each sector area of the rotor core, at least one magnetic barrier is connected to the air gap.

[0148] As Figure 20As shown, the motor rotates clockwise, and three magnetic barriers are provided along the side of the permanent magnet slots in the clockwise rotation direction of the motor. The present invention is not limited to three magnetic barriers. Among them, the three magnetic barriers are not connected to the permanent magnet slots, and the three magnetic barriers are connected to the air gap on the radial outer side of each sector area of the rotor core. At least one magnetic barrier is respectively connected to the permanent magnet slots, and on the radial outer side of each sector area of the rotor core, at least one magnetic barrier is not connected to the air gap; or on both sides of each permanent magnet slot, at least one magnetic barrier is respectively not connected to the permanent magnet slot, and on the radial outer side of each sector area of the rotor core, at least one magnetic barrier is connected to the air gap.

[0149] Embodiment 5

[0150] As Figure 21 and Figure 22 As shown, a motor structure 200 proposed in this embodiment includes a stator 202 and a rotor structure 100. The rotor structure 100 can rotate relative to the stator 202. Among them, the rotor structure 100 of any of the above embodiments is provided in the motor structure 200, so it has the beneficial effects of any of the above embodiments and will not be elaborated here.

[0151] It should be emphasized that since the motor structure 200 includes the above rotor structure 100, on the one hand, it effectively suppresses the cross-axis armature reaction of the motor, alleviates the degree of magnetic saturation and reduces the load back electromotive force, improving the torque density and overload capacity of the motor; on the other hand, it can also weaken the magnetic field harmonics of the rotor in the air gap 204 and improve the torque ripple of the motor.

[0152] Embodiment 6

[0153] As Figure 23 As shown, a laundry treatment device 300 proposed in this embodiment includes a housing 302 and a motor structure 200 provided in the housing 302. The motor structure 200 of the above Embodiment 5 is provided in the housing 302, so it has the beneficial effects of the above motor structure 200 and will not be elaborated here.

[0154] The present application also provides a specific rotor. In order to suppress the cross-axis armature reaction of the motor, alleviate the saturation of the iron core, and improve the torque density and overload capacity of the motor. The present invention proposes a rotor and its unidirectional rotation motor, including a permanent magnet and a rotor core. The rotor core includes a plurality of permanent magnet slots distributed radially, and the permanent magnets are embedded in the permanent magnet slots. The rotor core is laminated by silicon steel sheets, and magnetic barriers are provided along the side of the permanent magnet slots in the rotation direction of the motor. The two ends of the magnetic barriers respectively point to the permanent magnet slots and the outer circle of the punching sheet of the rotor core.

[0155] In order not to affect the permanent magnet flux linkage, while standardizing the magnetic flux path, weakening the magnetic field harmonics in the air gap, and improving the torque ripple of the motor. The extending direction of the magnetic barrier pointing to one end of the outer circle of the punching sheet of the rotor core is orthogonal or approximately orthogonal to the running direction of the rotor. Herein, the so-called approximate orthogonality means that the included angle range is between 60° and 120°. The extending direction of the magnetic barrier pointing to one end of the permanent magnet slot forms an included angle range between (180 / 2P)° and 90° with the permanent magnet slot.

[0156] In order to effectively reduce the q-axis inductance, suppress the cross-axis armature reaction of the motor, and relieve the core saturation when the magnetic barrier is in conduction with the permanent magnet slot or the outer circle of the punching sheet of the rotor core; when the magnetic barrier is not in conduction with the permanent magnet slot or the outer circle of the punching sheet of the rotor core, the structural strength of the rotor can be ensured. At least one of each magnetic barrier is not connected to the radial outer air gap of each sector area of the permanent magnet slot and the rotor core, or all magnetic barriers are connected to the radial outer air gap of each sector area of the permanent magnet slot and the rotor core.

[0157] It is necessary to ensure the structural strength of the rotor, effectively reduce the q-axis inductance, suppress the cross-axis armature reaction of the motor, and relieve the core saturation. When the magnetic barrier on the rotor core is in a non-connected state, the distance from the permanent magnet slot or the outer surface of the rotor is d, and d≥0.2mm.

[0158] In order to make full use of the inner core space of the rotor and optimize the torque density. The shape of the permanent magnet slot is a polygon with central symmetry. From the outer side to the inner side in the radial direction of the rotor, the magnetization direction presents a narrow-wide-narrow structure, the width of the narrow part is w1, the width of the wide part is w2, and the relationship satisfies w2≥w1.

[0159] According to an embodiment of the present invention, one end of the magnetic barrier 106 points to the permanent magnet slot 103 and the extending direction is orthogonal or approximately orthogonal to the permanent magnet slot 103, and the other end points to the outer circle of the punching sheet 1022 of the rotor core 102 and the extending direction is orthogonal or approximately orthogonal to the running direction of the rotor. Herein, the so-called approximate orthogonality means that the included angle range is between 60° and 120°.

[0160] The present invention also provides a unidirectional rotating motor, including a permanent magnet, a rotor, and a stator core. The stator includes a stator core and a stator winding. There are a plurality of stator teeth provided on the stator core, and the plurality of stator teeth are circumferentially distributed around the center line of the stator core. The stator winding is wound around the plurality of stator teeth. The rotor includes a rotor core, and the rotor core includes a plurality of permanent magnet slots distributed in the radial direction. The rotor core is divided into 2P sector areas by the permanent magnet slots.

[0161] According to an embodiment of the present invention, all the magnetic barriers 106 on both sides of the permanent magnet slot 103 per pole are not connected to the permanent magnet slot 103, and at least one magnetic barrier 106 is connected to the air gap 204 on the radial outer side of each sector area of the rotor core 102; or at least one magnetic barrier 106 on each side of the permanent magnet slot 103 per pole is respectively connected to the permanent magnet slot 103, and all the magnetic barriers 106 on the radial outer side of each sector area of the rotor core 102 are not connected to the air gap 204.

[0162] If any end of the magnetic barrier 106 on the rotor core 102 is in a non-connected state (not connected to the permanent magnet slot 103 and the air gap 204), then the distance d from this end to the permanent magnet slot 103 or the outer surface of the rotor is greater than 0.2 mm.

[0163] In this specific embodiment, by only designing multi-layer quadrature-axis magnetic barriers on the rotor core 102 and using at least one relatively inexpensive permanent magnet material for the combined design of the permanent magnets 104, the overload capacity of the motor can be effectively improved, and the torque ripple and cost of the motor can be reduced.

[0164] According to the rotor structure, motor structure and laundry treatment device provided by the present invention, on the one hand, on the basis of suppressing the quadrature-axis armature reaction of the motor, alleviating the degree of magnetic saturation, reducing the load back electromotive force, and improving the torque density and overload capacity of the motor, the position of the magnetic barrier can be set according to the limitation of the rotation direction of the rotor structure; on the other hand, since the magnetic barrier is formed by hollowing out the rotor core, the usage amount of rare earth permanent magnets can also be reduced.

[0165] In the present invention, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; the term "plurality" means two or more, unless otherwise clearly defined. Terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0166] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0167] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0168] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A rotor structure, characterized in that, Comprising: A rotor core, on which a plurality of permanent magnet slots are provided, and the plurality of permanent magnet slots are arranged in a circumferential direction around the rotor core; Permanent magnets, arranged in the permanent magnet slots; Magnetic barriers, arranged on the rotor core, and the rotor structure can rotate unidirectionally or bidirectionally in the circumferential direction. Along the rotation direction of the rotor structure, the magnetic barriers are arranged on at least one side of the permanent magnet slots; Wherein, both ends of the magnetic barrier respectively face the permanent magnet and the outer edge of the rotor core; The magnetic barrier specifically includes: A first slot section, which extends towards the permanent magnet slot; A second slot section, which is connected to the first slot section and extends towards the periphery of the rotor core; In 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 extending direction of the first slot section and the extending direction of the permanent magnet slot is [(180° / 2P), 90°]; The included angle between the extending direction of the second slot section and the rotation direction of the rotor core is [60°, 120°].

2. The rotor structure according to claim 1, characterized in that The cross-section of the permanent magnet slot is polygonal, and the cross-section of the permanent magnet slot is a centrosymmetric structure.

3. The rotor structure according to claim 2, characterized in that, The permanent magnet slot specifically includes a first slot portion, a second slot portion and a third slot portion that are connected in the radial direction of the rotor core; Wherein, the width of the first slot portion is less than or equal to the width of the second slot portion, and the width of the third slot portion is less than or equal to the width of the second slot portion.

4. The rotor structure according to claim 1, characterized in that The rotor structure rotates unidirectionally, and in the rotation direction of the rotor structure, at least one extending slot corresponding to each permanent magnet slot is arranged on the front side of the permanent magnet slot.

5. The rotor structure according to any one of claims 1 to 4, characterized in that One end of the first slot section far from the second slot section is connected to the permanent magnet slot.

6. The rotor structure according to any one of claims 1 to 4, characterized in that, There is a first distance between one end of the first slot section far from the second slot section and the permanent magnet slot.

7. The rotor structure according to claim 6, characterized in that, The first distance is greater than or equal to 0.2 mm.

8. The rotor structure according to any one of claims 1 to 4, characterized in that One end of the second slot section far from the first slot section is connected to the periphery of the rotor core.

9. The rotor structure according to any one of claims 1 to 4, characterized in that, There is a second distance between one end of the second slot section far from the first slot section and the periphery of the rotor core.

10. The rotor structure according to claim 9, wherein, The second distance is greater than or equal to 0.2 mm.

11. The rotor structure according to any one of claims 1 to 4, characterized in that, Among the multiple magnetic barriers corresponding to the same permanent magnet, the connection relationship between the first slot section and the permanent magnet slot is the same, and the connection relationship between the second slot section and the outer edge of the rotor core is the same.

12. The rotor structure according to any one of claims 1 to 4, characterized in that, Among the multiple magnetic barriers corresponding to the same permanent magnet, the connection relationship between the first slot section and the permanent magnet slot of at least two adjacent magnetic barriers is different, and the connection relationship between the second slot section and the outer edge of the rotor core is different.

13. The rotor structure according to any one of claims 1 to 4, characterized in that, Among the multiple magnetic barriers corresponding to the same permanent magnet, there is at least one magnetic barrier whose first slot section is not connected to the permanent magnet slot, and the second slot section is not connected to the outer edge of the rotor core.

14. The rotor structure according to any one of claims 1 to 4, characterized in that, The first slot section is linear, the second slot section is linear, and the included angle between the first slot section and the second slot section is [60°, 120°].

15. The rotor structure according to any one of claims 1 to 4, characterized in that, The first slot section and / or the second slot section is curved.

16. The rotor structure according to claim 1, characterized in that, The rotor core specifically includes: A plurality of laminated punching sheets, Among them, each of the punching sheets is provided with the permanent magnet groove.

17. The rotor structure according to claim 16, characterized in that, A plurality of the punching sheets form a plurality of iron core segments arranged axially, and the plurality of iron core segments are arranged axially along the rotor iron core to form the rotor iron core.

18. A motor structure, characterized in that, Comprising: A stator structure; The rotor structure according to any one of claims 1 to 17, coaxially arranged with the stator structure, and the rotor structure can rotate unidirectionally or bidirectionally relative to the stator structure.

19. The motor structure according to claim 18, characterized in that, The stator structure specifically includes: A stator iron core and a stator winding, the stator iron core is provided with a plurality of stator teeth, the plurality of stator teeth are circumferentially distributed around the axis of the stator iron core, and the stator winding is wound on the stator teeth.

20. A laundry treatment device, characterized in that, Comprising: A housing; The motor structure according to claim 18 or 19, provided in the housing.

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