Rotor structure, motor structure and electronic device

Abstract

Embodiments of the present application provide a rotor structure, a motor structure and an electronic device, wherein the rotor structure comprises: a rotor core comprising a first core segment and a second core segment; a rotor shaft, the rotor core being arranged around the rotor shaft and capable of rotating around the rotor shaft; a plurality of permanent magnet grooves are arranged on the rotor core, the permanent magnet grooves penetrating through two end faces of the rotor core along an axial direction of the rotor core; wherein, along a circumferential direction of the rotor core, a tooth protrusion is arranged between two adjacent permanent magnet grooves, and the outer contour of all the rotor cores in the first core segment is the same, the outer contour of all the rotor cores in the second core segment is the same, and the projection contour line of the tooth protrusion in the first core segment is not coincided with the projection contour line of the tooth protrusion in the second core segment. In the technical scheme of the present application, the rotor core is arranged in segments, but the permanent magnet does not need to be arranged in segments, which can reduce the manufacturing cost of the skew pole rotor on the one hand, and can improve the production efficiency on the other hand.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic devices, in particular to a rotor structure, a motor structure and an electronic device. BACKGROUND

[0002] The prior art usually adopts a rotor skew pole method to weaken the influence of torque ripple on noise. However, the permanent magnets must be segmented and staggered by an angle in the axial direction to form skew poles. For an interior permanent magnet (IPM) rotor, due to the particularity of its structure, the permanent magnets need to be segmented and then inserted into each rotor core segment, which increases production cost and is not conducive to improving production efficiency. 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 an electronic device.

[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, the rotor core comprising a plurality of rotor laminations stacked, the plurality of rotor laminations forming at least one first core segment and at least one second core segment; a rotor shaft, the rotor shaft being arranged through the rotor core, the rotor core being capable of rotating around the rotor shaft; a plurality of permanent magnet grooves are arranged on the rotor lamination and penetrate through two end faces of the rotor core in the axial direction of the rotor core; wherein, along the circumferential direction of the rotor lamination, a tooth protrusion is arranged between two adjacent permanent magnet grooves, the outer contour of all rotor laminations in the first core segment is the same on the end face projection of the rotor core, the outer contour of all rotor laminations in the second core segment is the same on the end face projection of the rotor core, and the projection contour line of the tooth protrusion of the rotor lamination in the first core segment is not coincident with the projection contour line of the tooth protrusion of the rotor lamination in the second core segment.

[0008] The rotor structure provided by the embodiment of the first aspect of the present application comprises a rotor core and a rotor shaft arranged in the rotor core. Specifically, the rotor core is formed by laminating a plurality of rotor laminations along the axial direction of the rotor shaft. By arranging permanent magnet grooves on the rotor laminations, the permanent magnets can be arranged in the permanent magnet grooves, and the permanent magnets can be driven by the magnetic force. It should be emphasized that the tooth protrusions are arranged between the two adjacent permanent magnet grooves. By limiting the tooth protrusions of at least two rotor laminations from overlapping when laminating the plurality of rotor laminations, that is, the projection contour lines of the tooth protrusions of the at least two rotor laminations do not coincide on the end face of the rotor core, the production cost and production efficiency of the skewed rotor during the manufacturing process can be effectively reduced. Specifically, the rotor structure in the present solution can weaken the air gap harmonics based on the characteristics of the skewed rotor, and since the rotor core is segmented, only one permanent magnet needs to be inserted into the corresponding permanent magnet groove along the axial direction of the rotor. In short, although the rotor core is segmented, the permanent magnet does not need to be segmented, which can reduce the manufacturing cost of the skewed rotor and improve the production efficiency.

[0009] It should be particularly emphasized that the permanent magnet grooves directly penetrate the two end faces along the axial direction of the rotor core, and the tooth protrusions are arranged in a staggered manner.

[0010] The number of permanent magnet grooves can be multiple. Generally, the plurality of permanent magnet grooves are uniformly arranged around the axis of the rotor core.

[0011] The extension direction of the permanent magnet groove is the axial direction of the rotor core. Therefore, in the present solution, the number of permanent magnets can be one, and one permanent magnet can be inserted into the permanent magnet groove of different rotor laminations.

[0012] In addition, for the permanent magnet groove, at least one of the two ends can penetrate the end face, for example, both ends can penetrate, or only one end can penetrate. However, regardless of the penetration relationship, it is necessary to ensure that the permanent magnet groove is not staggered, so that one permanent magnet can be inserted into the permanent magnet groove of all rotor laminations.

[0013] Further, the rotor core mainly comprises two core segments, and the outer contours of the rotor laminations in each core segment are the same to ensure the shape of each core segment is uniform to meet the special requirements of the structure of the built-in permanent magnet rotor, that is, the rotor cannot be manufactured in a continuous skewed manner and needs to be segmented and inserted into each rotor core segment.

[0014] At this time, by taking the end face of the rotor core as the projection face and limiting the contour line of the tooth protrusion on the first core segment on the projection face from coinciding with the contour line of the tooth protrusion on the second core segment on the projection face, the outer contours of the two core segments can be designed to be staggered.

[0015] It can be understood that when the different core segments are combined into the rotor core, the number of the first core segments can be one or multiple, and the number of the second core segments can be one or multiple.

[0016] It should be noted that the division of the first core segment and the second core segment is that the outer contour of the rotor lamination changes in the axial direction, and the position where the change occurs is the boundary between the first core segment and the second core segment.

[0017] In addition, the rotor structure in the above-mentioned scheme provided by the application can also have the following additional technical features:

[0018] In the above technical solution, the tooth protrusion includes a first contour line, a second contour line and a third contour line on the side wall of the rotor core away from the side of the rotor shaft in the radial direction; the second contour line and the third contour line are connected to the two ends of the first contour line respectively, and the other end of the second contour line and the other end of the third contour line extend to the circumferential edge of the tooth protrusion respectively.

[0019] In this technical solution, for the tooth protrusion, it can be regarded as a fan-shaped structure of the rotor core, specifically, the circumferential outer contour of the tooth protrusion includes the third contour line, the first contour line and the second contour line connected in sequence, wherein the first contour line is arranged in the middle part, and the two ends are connected to the circumferential edge through the second contour line and the third contour line respectively, and the above-mentioned circumferential outer contour is the side wall contour away from the side of the rotor shaft in the radial direction of the rotor core. By defining the first contour line, the contour at the position in the middle region is defined as the first contour line, so as to facilitate the subsequent positioning of the first contour line, thereby realizing the harmonic weakening of the skew rotor.

[0020] In the above technical solution, the two permanent magnet grooves adjacent to the tooth protrusion are symmetrical about the symmetry axis OB, the first contour line is asymmetrical about the symmetry axis OB, and the second contour line is located on the inner side of the virtual circle formed by the first contour line.

[0021] In this technical solution, by limiting the asymmetry of the first contour line, under the lamination of the plurality of rotor laminations, the outer edge of the first core segment or the second core segment is relatively regular, which is beneficial to processing, and at the same time, the second contour line is limited to be inside, that is, the virtual circle formed by the first contour line will cover the second contour line inside, and there is a point on the first contour line which is the outermost side of the entire rotor lamination, so that the magnetic performance of the rotor lamination can be improved under the action of the first contour line.

[0022] In the technical solution, the line passing through the rotation center origin of the rotor lamination and the center point of the first profile line is the profile center line OA, and the first angle ∠AOB is formed between the profile center line OA and the symmetry axis OB; wherein, on the end face of the rotor lamination, the second angle is formed between the projection of the profile center line of the first core segment and the projection of the profile center line of the second core segment, and the second angle is twice the first angle ∠AOB.

[0023] In the technical solution, by limiting the first angle between the profile center line and the symmetry axis to be half of the skew pole angle between the first core segment and the second core segment, the first profile line on the first core segment is necessarily asymmetrically arranged, and the second core segment also needs to maintain a shape suitable for the first core segment to meet the above angle relationship. Specifically, the angle between the profile center line of the first profile line in the second core segment and the symmetry axis is the same as the angle in the first core segment, but the offset direction is opposite, that is, the first profile line on the first core segment is offset to the front side, and the first profile line on the second core segment is offset to the rear side, and the offset amplitudes of the two core segments are the same.

[0024] In the technical solution, on the end face of the rotor core, the projection profile line of the tooth protrusion on the first core segment and the projection profile line of the tooth protrusion on the second core segment are mirror-inverted.

[0025] In the technical solution, by limiting the end face of the rotor core to be a projection face, the projection profile line of the tooth protrusion of the first core segment and the projection profile line of the tooth protrusion of the second core segment are mirror-inverted on the projection face. At this time, during machining, the first core segment and the second core segment are completely the same, and only one of them needs to be inverted on the other to complete the installation of the rotor core with the skew pole rotor function, greatly reducing the manufacturing cost.

[0026] In the technical solution, the first core segment and the second core segment are arranged adjacent to each other in the axial direction to form the rotor core.

[0027] In the technical solution, when two core segments are combined to form a rotor core, they need to be arranged adjacent to each other in the axial direction, so that the entire rotor core functions as a skew pole rotor. It needs to be emphasized that the two core segments are arranged in the axial direction to facilitate the axial through design of the permanent magnet slot, thereby facilitating the reduction of production cost and the improvement of production efficiency in the manufacturing process of the skew pole rotor.

[0028] In the technical solution, the side of the tooth protrusion close to the rotor shaft is provided with a positioning hole, and the center of each positioning hole is located at the middle of the tooth protrusion in the circumferential direction relative to the rotor shaft.

[0029] In the technical scheme, the positioning hole is arranged on one side of the tooth protrusion, so that the accuracy of structure assembly is ensured during machining, and installation efficiency is provided.It needs to be particularly pointed out that the positioning hole is arranged at a position close to the axis, and the center of the positioning hole is located on the symmetry axis of the two adjacent permanent magnet grooves, that is, the positioning hole is arranged at the middle of the tooth protrusion in the circumferential direction relative to the rotor shaft, so as to facilitate the machining positioning.

[0030] In the above technical scheme, the permanent magnet is arranged in the permanent magnet groove.

[0031] In the technical scheme, the permanent magnet is arranged in the permanent magnet groove, so that the rotor structure is driven under the magnetic action of the permanent magnet, and the rotor structure can rotate relative to the stator to realize normal operation of the motor.

[0032] It needs to be emphasized that in the embodiment, the permanent magnet is a whole.

[0033] The embodiment of the second aspect of the application provides a motor structure, which comprises a stator structure and a rotor structure coaxially arranged with the stator structure and capable of rotating relative to the stator.

[0034] The motor structure provided by the embodiment of the second aspect of the application comprises the stator structure and the rotor structure, wherein the rotor structure in the above-mentioned technical scheme of the first aspect is arranged in the motor structure, so that the rotor structure has the beneficial effects of any of the above-mentioned rotor structures, which will not be described here again.

[0035] It needs to be emphasized that since the motor structure comprises the above-mentioned rotor structure, the permanent magnet does not need to be segmented, which can reduce the manufacturing cost of the skew pole rotor and improve the production efficiency.

[0036] In the above technical scheme, the stator structure specifically comprises a stator core and a stator winding, the stator core is provided with a plurality of stator teeth, the plurality of stator teeth are distributed in the circumferential direction around the axis of the stator core, and the stator winding is wound on the stator teeth.

[0037] In the technical scheme, the stator structure mainly comprises a stator core and a stator winding, and under the joint action of the stator core and the stator winding, a magnetic field that covers the rotor structure is generated when power is supplied, so as to drive the rotor structure to rotate under the electromagnetic action.

[0038] The stator core is provided with stator teeth, a winding slot is formed between adjacent two stator teeth, and the stator winding is wound on the stator teeth to ensure normal operation of the motor.

[0039] The embodiment of the third aspect of the application provides an electronic device, which comprises a shell and a motor structure in the above-mentioned technical scheme of the second aspect arranged in the shell.

[0040] According to the electronic device provided by the third aspect of the present application, the electronic device comprises a shell and a motor structure arranged in the shell, and the electronic device is provided with the motor structure of the second aspect, so that the electronic device has the beneficial effects of the motor structure, which will not be described here.

[0041] The electronic device includes, but is not limited to, a washing machine, a dryer, a compressor, an outdoor unit, an air conditioner and other devices using a motor.

[0042] 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

[0043] Figure 1 A structural schematic diagram of a rotor structure according to an embodiment of the present application is shown;

[0044] Figure 2 A structural schematic diagram of a rotor lamination according to an embodiment of the present application is shown;

[0045] Figure 3 A structural schematic diagram of a first core segment according to an embodiment of the present application is shown;

[0046] Figure 4 A structural schematic diagram of a second core segment according to an embodiment of the present application is shown;

[0047] Figure 5 A structural schematic diagram of a rotor core according to an embodiment of the present application is shown;

[0048] Figure 6 A structural schematic diagram of a motor structure according to an embodiment of the present application is shown;

[0049] Figure 7 A structural schematic diagram of an electronic device according to an embodiment of the present application is shown.

[0050] The electronic device includes, but is not limited to, a washing machine, a dryer, a compressor, an outdoor unit, an air conditioner and other devices using a motor. Figures 1 to 7 The correspondence between the reference signs and the component names in the accompanying drawings is as follows:

[0051] 100: rotor structure; 102: rotor core; 1022: rotor lamination; 1024: first core segment; 1026: second core segment; 103: permanent magnet slot; 104: permanent magnet; 106: rotor shaft; 108: tooth protrusion; 1082: first profile line; 1084: second profile line; 1086: third profile line; 110: symmetry axis; 112: positioning hole; 200: motor structure; 202: stator structure; 204: stator core; 300: electronic device; 302: shell. DETAILED DESCRIPTION

[0052] In order to enable the above-mentioned objects, features and advantages of the embodiments of the present application to be more clearly understood, further detailed description of the embodiments of the present application will be made with reference to the accompanying 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.

[0053] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, but the embodiments of the present application can also be implemented in other ways different from those described herein, and therefore the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0054] Reference will now be made to the following description Figures 1 to 7 described according to some embodiments of the present application.

[0055] Embodiment one

[0056] As Figure 1 shown, the rotor structure 100 proposed in this embodiment includes a rotor core 102 and a rotor shaft 106 arranged in the rotor core 102. Specifically, the rotor core 102 is formed by laminating a plurality of rotor laminations 1022 along the axial direction of the rotor shaft 106. By arranging permanent magnet grooves 103 on the rotor laminations 1022, the permanent magnets 104 can be arranged in the permanent magnet grooves 103, and the permanent magnets 104 can be driven by magnetic force due to the permanent magnet grooves 103 penetrating through both end faces. It should be emphasized that a tooth protrusion 108 is arranged between two adjacent permanent magnet grooves 103. By arranging the tooth protrusion 108 in the plurality of rotor laminations 1022 such that at least two rotor laminations 1022 are not overlapped when laminated, i.e., the projection contour lines of the tooth protrusion 108 of the at least two rotor laminations 1022 do not coincide on the end face projection of the rotor core 102, the production cost and production efficiency of the skew pole rotor during manufacturing can be effectively reduced. Specifically, the rotor structure 100 in this scheme can weaken the air gap harmonics based on the characteristics of the skew pole rotor, and since the rotor core is segmented, only one permanent magnet 104 is used to be inserted into the corresponding permanent magnet groove 103 and arranged along the axial direction of the rotor. In short, although the rotor core 102 is segmented, the permanent magnet 104 does not need to be segmented, which on the one hand can reduce the manufacturing cost of the skew pole rotor, and on the other hand can improve the production efficiency.

[0057] It should be particularly emphasized that the permanent magnet grooves 103 directly penetrate through both end faces along the axial direction of the rotor core 102, and on this basis, the tooth protrusion 108 is arranged in a staggered manner.

[0058] Among them, the number of permanent magnet grooves 103 can be multiple, generally, multiple permanent magnet grooves 103 are uniformly arranged around the axis of the rotor core 102.

[0059] The extension direction of the permanent magnet slot 103 is the axial direction of the rotor core 102, so in this solution, the number of permanent magnets can be one, and one permanent magnet can be inserted into the permanent magnet slot of different rotor laminations.

[0060] In addition, for the permanent magnet slot 103, at least one of the two ends can be a through end surface, for example, both ends are through, or one end is through, but regardless of the through relationship, it is necessary to ensure that the permanent magnet slot is not staggered, so that one permanent magnet can be inserted into the permanent magnet slot of all rotor laminations.

[0061] In addition, a positioning hole 112 is arranged on one side of the tooth protrusion 108 to facilitate accurate structure assembly during processing and provide installation efficiency. It should be particularly noted that the positioning hole 112 is arranged near the axis, and the center of the positioning hole 112 is located on the symmetry axis 110 of the adjacent two permanent magnet slots 103, that is, it is arranged at the middle of the tooth protrusion 108 in the circumferential direction relative to the rotor shaft 106, so as to facilitate processing positioning.

[0062] The permanent magnet 104 is arranged in the permanent magnet slot 103, 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 to realize normal operation of the motor.

[0063] It should be emphasized that in this embodiment, the permanent magnet 104 is a whole.

[0064] In this embodiment, as shown in Figure 3 , Figure 4 and Figure 5 , the rotor core 102 mainly includes two adjacent core sections, i.e., a first core section 1024 and a second core section 1026, and the outer contours of the rotor laminations 1022 in each core section are the same to ensure that the shapes of each core section are uniform to meet the special requirements of the structure of the built-in permanent magnet rotor, i.e., the rotor cannot adopt the continuous skew pole mode.

[0065] At this time, by taking the end surface of the rotor core 102 as a projection surface, the contour line of the tooth protrusion 108 on the first core section 1024 on the projection surface is limited to be different from the contour line of the tooth protrusion 108 on the second core section 1026 on the projection surface, so that the outer contours of the two core sections are designed to be staggered.

[0066] It can be understood that when different core sections are combined to form a rotor core, the number of first core sections can be one or more, and the number of second core sections can be one or more.

[0067] It should be noted that the segmentation of the first and second core segments changes the outer contour of the rotor lamination in the axial direction, and the changed position is the boundary between the first and second core segments.

[0068] When the two core segments are combined to form the rotor core 102, it is necessary to define that they are arranged axially adjacent, so that the entire rotor core 102 functions as a skewed rotor. It should be emphasized that, due to the axial arrangement of the two core segments, the axial through design of the permanent magnet slot 103 is facilitated, thereby facilitating the reduction of production cost and providing production efficiency in the manufacturing process of the skewed rotor.

[0069] Embodiment Two

[0070] As shown in Figure 4 and Figure 5 , the rotor structure 100 proposed in this embodiment includes a rotor core 102 and a rotor shaft 106 arranged in the rotor core 102. Specifically, the rotor core 102 is formed by laminating a plurality of rotor laminations 1022 along the axial direction of the rotor shaft 106. By arranging the permanent magnet slot 103 on the rotor lamination 1022, the permanent magnet 104 can be arranged in the permanent magnet slot 103, and the permanent magnet 104 can be driven by the magnetic force. It should be emphasized that the tooth protrusion 108 is arranged between the two adjacent permanent magnet slots 103. By limiting the tooth protrusion 108 of at least two rotor laminations 1022 in the plurality of rotor laminations 1022 from overlapping when laminated, i.e., the projection contour line of the tooth protrusion 108 of the at least two rotor laminations 1022 does not coincide on the end face projection of the rotor core 102, the production cost and production efficiency in the manufacturing process of the skewed rotor can be effectively reduced. Specifically, the rotor structure 100 in this scheme can weaken the air gap harmonics based on the characteristics of the skewed rotor, and since the rotor core is segmented, only one permanent magnet 104 is used to insert into the corresponding permanent magnet slot 103 and arranged along the axial direction of the rotor. In short, although the rotor core 102 is segmented, the permanent magnet 104 does not need to be segmented, which on the one hand can reduce the manufacturing cost of the skewed rotor, and on the other hand can improve the production efficiency.

[0071] Among them, as shown in Figure 2As shown, for the tooth protrusions 108, they can be regarded as a fan-shaped structure of the rotor core 102, and specifically, the circumferential outer contour of the tooth protrusions 108 includes the connected third contour line 1086, the first contour line 1082 and the second contour line 1084, wherein the first contour line 1082 is arranged at the middle portion and connected to the circumferential edges through the second contour line 1084 and the third contour line 1086 respectively. The circumferential outer contour is the side wall contour on the side of the rotor core 102 away from the rotor shaft 106 in the radial direction. By defining the first contour line 1082, 1084 and the third contour line 1086, the position of the profile in the middle region is defined as the first contour line 1082, so as to facilitate the subsequent positioning of the first contour line, thereby realizing the harmonic weakening of the skew rotor.

[0072] wherein the first contour line 1082 is Figure 2 In the CD section, the symmetry axis 110 is a straight line represented by OB, and the center line of the first contour line 1082 is a straight line represented by OA.

[0073] Further, the first contour line 1082 is asymmetric, and under the lamination of the plurality of rotor laminations 1022, the outer edge of the first core section 1024 or the second core section 1026 is relatively regular, which is beneficial for processing, and at the same time, the second contour line 1084 and the third contour line 1086 are limited to be inward, i.e. the virtual circle formed by the first contour line 1082 will cover the second contour line 1084 and the third contour line 1086, and there is a point on the first contour line 1082 that is the outermost point of the entire rotor lamination 1022, so that the magnetic performance of the rotor lamination 1022 can be improved under the action of the first contour line 1082.

[0074] Embodiment three

[0075] As Figure 1As shown, the rotor structure 100 proposed in this embodiment includes a rotor core 102 and a rotor shaft 106 arranged in the rotor core 102. Specifically, the rotor core 102 is formed by laminating a plurality of rotor laminations 1022 along the axial direction of the rotor shaft 106. By arranging permanent magnet grooves 103 on the rotor laminations 1022, the permanent magnets 104 can be arranged in the permanent magnet grooves 103, and the permanent magnets 104 can be driven by magnetic force since the permanent magnet grooves 103 pass through both end surfaces. It should be emphasized that a tooth protrusion 108 is arranged between two adjacent permanent magnet grooves 103. By arranging the tooth protrusion 108 in the plurality of rotor laminations 1022 such that the tooth protrusion 108 is not overlapped when the plurality of rotor laminations 1022 are laminated, i.e., the projection contour line of the tooth protrusion 108 of the at least two rotor laminations 1022 does not coincide on the end surface projection of the rotor core 102, the production cost during the manufacturing process of the skew rotor can be effectively reduced and the production efficiency can be improved. Specifically, the rotor structure 100 in this scheme can weaken the air gap harmonics based on the characteristics of the skew rotor, and since the rotor core is segmented, only one permanent magnet 104 needs to be inserted into the corresponding permanent magnet groove 103 and arranged along the axial direction of the rotor. In short, although the rotor core 102 is segmented, the permanent magnet 104 does not need to be segmented, which can reduce the manufacturing cost of the skew rotor and improve the production efficiency.

[0076] In a specific embodiment, the first angle between the contour center line and the symmetry axis 110 is half of the skew angle between the first core segment 1024 and the second core segment 1026. At this time, the first contour line 1082 on the first core segment 1024 is necessarily asymmetrically arranged, and the second core segment 1026 also needs to maintain a shape that is adapted to the first core segment 1024 in order to meet the above angle relationship. Specifically, at this time, the angle between the contour center line of the first contour line 1082 and the symmetry axis 110 in the second core segment 1026 is the same as the angle in the first core segment 1024, but the offset direction is opposite, i.e., the first contour line 1082 on the first core segment 1024 is offset to the front side, and the first contour line 1082 on the second core segment 1026 is offset to the rear side, and the offset amplitudes of the two core segments are the same.

[0077] wherein the first angle is Figure 2 wherein the included angle of AOB.

[0078] In another specific embodiment, the end surface of the rotor core 102 is limited to a projection surface, the tooth protrusions 108 of the first core segment 1024 and the tooth protrusions 108 of the second core segment 1026 are respectively mirrored between the projection profiles projected on the projection surface, at this time, the first core segment 1024 and the second core segment 1026 are completely the same in processing, only one of them needs to be inverted to the other, that is, the installation of the rotor core 102 with the function of the skew pole rotor can be completed, which greatly reduces the manufacturing cost.

[0079] The application also proposes a specific skew pole rotor core, as shown in the drawings, a plurality of core segments (i.e. the first core segment 1024 and the second core segment 1026) are coaxially arranged in sequence, each core segment includes a plurality of axially laminated stampings (i.e. rotor stampings 1022), each stamping is circumferentially spaced apart a plurality of permanent magnet 104 mounting slots (i.e. permanent magnet slots 103), the periphery of each stamping has a plurality of outward protrusions (i.e. tooth protrusions 108) distributed along the circumferential direction thereof, each outward protrusion is asymmetric in the circumferential direction of the core segment, the outward protrusions of each core segment overlap, the outward protrusions on the plurality of core segments are staggered in the axial direction of the core segment, and the permanent magnet 104 mounting slots on the plurality of core segments overlap in the axial direction of the core segment. Figures 1 to 5 In addition, the core stampings of different core segments are the same, and one of them is flipped by 180 degrees in the axial direction of the skew pole rotor core 102 relative to the other.

[0080] Further, the outer profile of the outward protrusion has a main arc segment CD and an auxiliary segment connected with the main arc segment CD, the main arc segment CD is concentrically arranged with the shaft, and the auxiliary segment is located inside the circle where the main arc segment CD is located.

[0081] The angle between the center line OA of the main arc segment CD and the physical center line (i.e. the axis of symmetry) OB of the adjacent permanent magnet 104 mounting slot is θ, and the skew pole angle of the adjacent two cores is β, then θ = β / 2.

[0082] Embodiment Four

[0083] As shown in the drawings, the motor structure 200 proposed in this embodiment includes a stator structure 202 and a rotor structure 100, the rotor structure 100 can rotate relative to the stator structure 202, wherein the motor structure 200 is provided with the rotor structure 100 of any of the above embodiments, and therefore has the beneficial effects of any of the above embodiments, which will not be described here.

[0084] Figure 6 It needs to be emphasized that since the motor structure 200 includes the above-mentioned rotor structure 100, the rotor core is segmented, but the permanent magnet does not need to be segmented, on the one hand, the manufacturing cost of the skew pole rotor can be reduced, and on the other hand, the production efficiency can be improved.

[0085] It needs to be emphasized that since the motor structure 200 includes the above-mentioned rotor structure 100, the rotor core is segmented, but the permanent magnet does not need to be segmented, on the one hand, the manufacturing cost of the skew pole rotor can be reduced, and on the other hand, the production efficiency can be improved.

[0086] ​Further, the stator structure 202 mainly comprises a stator core 204 and a stator winding, under the joint action of both, a magnetic field will be generated to enclose the rotor structure when energized, so as to drive the rotor structure to rotate under electromagnetic action.

[0087] Wherein, the stator core 204 is provided with stator teeth, and a winding slot is formed between two adjacent stator teeth, and the stator winding is wound on the stator teeth to ensure the normal operation of the motor.

[0088] Embodiment five

[0089] As shown in Figure 7 The electronic device 300 provided by the embodiment comprises a shell 302 and a motor structure 200 arranged in the shell 302, and the shell 302 is provided with the motor structure 200 in the above-mentioned embodiment four, so as to have the beneficial effects of the motor structure 200, which will not be described here.

[0090] According to the rotor structure, the motor structure and the electronic device provided by the application, the rotor core is segmented, but the permanent magnet does not need to be segmented, which can reduce the manufacturing cost of the skew pole rotor and improve the production efficiency.

[0091] In the present application, the terms "first", "second", "third" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more than two, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, or detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an 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.

[0092] In the description of the present application, it should be understood that the terms "up", "down", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the purpose of describing the present application and simplifying 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, it cannot be understood as a limitation on the present application.

[0093] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "certain embodiments", and the like is intended to indicate that the described implementation, feature, structure, material or characteristic is included in at least one embodiment or example of the application. The illustrative representations of the above terms in the specification are not necessarily referring to the same embodiment or example. Moreover, the described implementation, feature, structure, material or characteristic can be combined in any one or more embodiments or examples in a suitable manner.

[0094] The above only is the preferred embodiment of the present application, and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rotor structure, characterized in that, include: A rotor core comprising a plurality of stacked rotor laminations, the plurality of rotor laminations forming at least one first core segment and at least one second core segment; A rotor shaft is mounted on the rotor core, and the rotor core is capable of rotating around the rotor shaft. The rotor lamination is provided with multiple permanent magnet slots that extend through the two end faces of the rotor core along the axial direction of the rotor core. Wherein, along the circumferential direction of the rotor lamination, a toothed protrusion is provided between two adjacent permanent magnet slots. On the end face projection of the rotor core, the outer contours of all the rotor laminations in the first core segment are the same, the outer contours of all the rotor laminations in the second core segment are the same, and the projected contour lines of the toothed protrusions of the rotor laminations in the first core segment and the projected contour lines of the toothed protrusions of the rotor laminations in the second core segment do not coincide. The toothed protrusion includes a first profile line, a second profile line, and a third profile line on the side wall of the rotor core away from the rotor shaft along the radial direction. The second profile line and the third profile line are respectively connected to the two ends of the first profile line. The line connecting the origin of the rotation center of the rotor lamination and the center point of the first contour line is the contour center line OA; The first contour line is asymmetrical about the axis of symmetry OB, and the second contour line is located inside the virtual circle formed by the first contour line; The contour centerline OA and the axis of symmetry OB form a first angle ∠AOB; Wherein, on the end face of the rotor lamination, a second angle is formed between the projection of the outline center line of the first iron core segment and the projection of the outline center line of the second iron core segment, and the second angle is twice the first angle. The first outline on the first core segment is offset to the front, and the first outline on the second core segment is offset to the rear, with the offset magnitudes of the two core segments being the same.

2. The rotor structure according to claim 1, characterized in that, The other end of the second contour line and the other end of the third contour line extend to the circumferential edge of the toothed protrusion, respectively.

3. The rotor structure according to claim 2, characterized in that, The two permanent magnet slots adjacent to the toothed protrusion are symmetrical about the axis of symmetry OB.

4. The rotor structure according to claim 1, characterized in that, On the end face of the rotor core, the projected outline of the tooth protrusion on the first core segment is a mirror image of the projected outline of the tooth protrusion on the second core segment.

5. The rotor structure according to claim 1, characterized in that, The first core segment and the second core segment are arranged adjacent to each other along the axial direction to form the rotor core.

6. The rotor structure according to any one of claims 1 to 5, characterized in that, The toothed protrusion is provided with a positioning hole on the side near the rotor shaft, and the center of each positioning hole is located at the middle of the toothed protrusion in the circumferential direction relative to the rotor shaft.

7. The rotor structure according to any one of claims 1 to 5, characterized in that, Also includes: A permanent magnet is disposed in the permanent magnet slot.

8. A motor structure, characterized in that, include: Stator structure; The rotor structure as described in any one of claims 1 to 7 is coaxially arranged with the stator structure, and the rotor structure is capable of rotating unidirectionally or bidirectionally relative to the stator structure.

9. The motor structure according to claim 8, characterized in that, The stator structure specifically includes: The stator core and stator winding are provided. The stator core is provided with a plurality of stator teeth, which are circumferentially distributed around the axis of the stator core. The stator winding is wound on the stator teeth.

10. An electronic device, characterized in that, include: case; The motor structure as described in claim 8 or 9 is disposed within the housing.

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