CN113890227A

CN113890227A - Rotor structure, motor structure and electronics

Info

Publication number: CN113890227A
Application number: CN202111137253.XA
Authority: CN
Inventors: 杨雄; 李文瑞
Original assignee: Foshan Welling Washer Motor Manufacturing Co Ltd; Midea Welling Motor Technology Shanghai Co Ltd
Current assignee: Foshan Welling Washer Motor Manufacturing Co Ltd; Midea Welling Motor Technology Shanghai Co Ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2022-01-04

Abstract

An embodiment of the present invention provides a rotor structure, a motor structure, and an electronic apparatus, wherein the rotor structure includes: the rotor core comprises a first core section and a second core section; the rotor shaft penetrates through the rotor iron core, and the rotor iron core can rotate around the rotor shaft; the rotor punching sheet is provided with a plurality of permanent magnet grooves which penetrate through two end faces of the rotor core along the axial direction of the rotor core; the rotor core comprises a first core segment, a second core segment and a rotor core, wherein a tooth convex part is arranged between every two adjacent permanent magnet grooves along the circumferential direction of the rotor punching sheet, the outer contours of all the rotor punching sheets in the first core segment are the same in the projection of the end face of the rotor core, the outer contours of all the rotor punching sheets in the second core segment are the same in the second core segment, and the projection contour line of the tooth convex part in the first core segment is not overlapped with the projection contour line of the tooth convex part in the second core segment. In the technical scheme of the invention, although the rotor iron core is arranged in a segmented manner, the permanent magnet does not need to be segmented, so that the manufacturing cost of the oblique-pole rotor can be reduced on one hand, and the production efficiency can be improved on the other hand.

Description

Rotor structure, motor structure and electronic device

Technical Field

The invention relates to the technical field of electronic devices, in particular to a rotor structure, a motor structure and an electronic device.

Background

The prior art generally adopts a rotor skewed pole mode to weaken the influence of torque pulsation on noise. However, the permanent magnets must be staggered by an angle along the axial direction to form an oblique pole, and for the built-In Permanent Magnet (IPM) rotor, due to the structural particularity of the IPM rotor, the permanent magnets need to be inserted into each rotor core section after being segmented, so that the production cost is increased, and the improvement of the production efficiency is not facilitated.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

In view of this, embodiments of the first aspect of the present invention provide a rotor structure.

Embodiments of a second aspect of the invention provide an electric machine structure.

An embodiment of a third aspect of the invention provides an electronic device.

In order to achieve the above object, an embodiment of a first aspect of the present invention provides a rotor structure including: the rotor core comprises a plurality of stacked rotor punching sheets, and the plurality of rotor punching sheets form at least one first core section and at least one second core section; the rotor shaft penetrates through the rotor iron core, and the rotor iron core can rotate around the rotor shaft; the rotor punching sheet is provided with a plurality of permanent magnet grooves which penetrate through two end faces of the rotor core along the axial direction of the rotor core; the rotor core comprises a first core segment, a second core segment and a rotor punching sheet, wherein a tooth convex part is arranged between every two adjacent permanent magnet grooves along the circumferential direction of the rotor punching sheet, the outer contours of all the rotor punching sheets in the first core segment are the same in the projection of the end face of the rotor core, the outer contours of all the rotor punching sheets in the second core segment are the same in the second core segment, and the projection contour line of the tooth convex part of the rotor punching sheet in the first core segment is not overlapped with the projection contour line of the tooth convex part of the rotor punching sheet in the second core segment.

According to an embodiment of the first aspect of the present invention, a rotor structure is provided, which includes a rotor core and a rotor shaft disposed in the rotor core. Specifically, the rotor core is formed by laminating a plurality of rotor punching sheets which are arranged in a stacked mode along the axial direction of the rotor shaft, and the permanent magnet slots are formed in the rotor punching sheets and penetrate through two end faces, so that the permanent magnets can be arranged in the permanent magnet slots, and the permanent magnets can be driven by magnetic force conveniently. It should be emphasized that, a tooth convex portion is arranged between two adjacent permanent magnet slots, and by defining that the tooth convex portions of at least two rotor sheets in the plurality of rotor sheets cannot be overlapped when being stacked, that is, projection contour lines of the tooth convex portions of at least two rotor sheets do not coincide on a projection of an end face of the rotor core, production cost in a manufacturing process of the oblique-pole rotor can be effectively reduced and production efficiency can be improved. In short, although the rotor core is arranged in a segmented manner, the permanent magnets do not need to be segmented, so that the manufacturing cost of the oblique-pole rotor can be reduced, and the production efficiency can be improved.

It should be particularly emphasized that the permanent magnet slots directly penetrate through the two end faces in the axial direction of the rotor core, and on the basis of this, the tooth convex parts are arranged in a staggered manner.

There may be a plurality of permanent magnet slots, and typically, the plurality of permanent magnet slots are uniformly arranged around the axis of the rotor core.

Wherein, the extending direction in permanent magnet groove is rotor core's axial direction promptly, so in this scheme, the quantity of permanent magnet can be one, and a permanent magnet can insert in the permanent magnet groove of different rotor punching.

In addition, for the permanent magnet slots, at least one of the two ends may be through end faces, for example, both ends are through, or one end of the two ends is through, but no matter what kind of through relation, it is necessary to ensure that the permanent magnet slots are not staggered, so that one permanent magnet may be inserted into the permanent magnet slots of all the rotor sheets.

Furthermore, the rotor core mainly comprises two core sections, the outer contours of the rotor sheets in each core section are the same, so that the overall shape of each core section is uniform, the special requirements for the structure of the built-in permanent magnet rotor are met, namely the rotor cannot adopt a continuous oblique pole mode and needs to be inserted into each rotor core section after being segmented.

At this time, the end face of the rotor core is used as a projection plane, and the contour line of the tooth convex part on the first core segment on the projection plane is limited to be not overlapped with the contour line of the tooth convex part on the second core segment on the projection plane, so that the outer contours of the two core segments have certain dislocation design.

It can be understood that when different core segments are combined into the rotor core, the number of the first core segments may be one or more, and the number of the second core segments may be one or more.

It should be added that the outer contour of the rotor sheet that is divided into the first core segment and the second core segment changes in the axial direction, and the changed position is the boundary line between the first core segment and the second core segment.

In addition, the rotor structure in the above scheme provided by the invention can also have the following additional technical features:

in the technical scheme, the side wall of one side of the tooth convex part, which is far away from the rotor shaft along the radial direction of the rotor core, comprises a first contour line, a second contour line and a third contour line; the second contour line and the third contour line are respectively connected with two ends of the first contour line, and the other ends of the second contour line and the third contour line respectively extend to the circumferential edge of the tooth convex part.

In this technical solution, the tooth convex portion can be regarded as a fan-shaped structure of the rotor core, and specifically, a circumferential outer contour of the tooth convex portion includes a third contour line, a first contour line and a second contour line that are connected to each other, where the first contour line is disposed at a middle portion, and two ends of the first contour line are connected to a circumferential edge through the second contour line and the third contour line, respectively, and the circumferential outer contour is a sidewall contour of a side that is away from the rotor shaft in a radial direction of the rotor core. Through defining first contour line, second contour line and third contour line, be the contour definition that the position is in more middle zone for first contour line to be convenient for follow-up injectd the position of first contour line, thereby realize the harmonic weakening of oblique pole rotor.

In the above technical scheme, two permanent magnet slots adjacent to the tooth convex part 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 inside a virtual circle formed by the first contour line.

In this technical scheme, through injecing first outline line asymmetry, under the stromatolite setting of a plurality of rotor punching, the outward flange that makes first iron core section or second iron core section is comparatively regular, does benefit to processing, simultaneously, inject the second outline line and lean on interior, including the virtual circle that first outline line formed can be with second outline line cage cover promptly, there is the point in the outside of whole rotor punching on the first outline line, so can improve the magnetic property of rotor punching under the effect of first outline line.

In the technical scheme, a connection line passing through the rotation center origin of the rotor punching sheet and the center point of the first contour line is a contour center line OA, and a first angle AOB is formed between the contour center line OA and the symmetry axis OB; and on the end surface of the rotor sheet, a second angle is formed between the projection of the contour center line of the first iron core section and the projection of the contour center line of the second iron core section, and the second angle is twice as large as the first angle AOB.

In this technical scheme, through limiting the first angle between profile center line and the axis of symmetry to be half of the oblique polar angle between first iron core section and the second iron core section, the first profile line on first iron core section must be in asymmetric setting this moment, second iron core section in order to satisfy above-mentioned angular relation, also need keep the shape with first iron core section adaptation, specifically, the angle between the profile center line of first profile line in the second iron core section and the axis of symmetry and the angle size in first iron core section this moment are the same, but the skew direction is opposite, also the skew of first profile line on first iron core section is close to the front side, then the skew of first profile line on the second iron core section is close to the rear side, and the skew range of two iron core sections is all the same.

Among the above-mentioned technical scheme, on rotor core's terminal surface, the projection contour line of the tooth convex part on the first iron core section and the projection contour line of the tooth convex part on the second iron core section are the mirror image upset.

In this technical scheme, through the terminal surface restriction with rotor core for the plane of projection, the tooth convex part of first iron core section and the tooth convex part of second iron core section are the mirror image upset respectively between the projection outline line that projects on the plane of projection, and processing man-hour this moment, first iron core section and second iron core section are identical, only need with one of them back-off to another on, can accomplish the installation of the rotor core that has the oblique polar rotor function, greatly reduce manufacturing cost.

Among the above-mentioned technical scheme, first iron core section and second iron core section set up along axial adjacent and form rotor core.

In this technical scheme, when forming rotor core with two core segment combinations, need inject the two and be along the adjacent setting of axial to make whole rotor core play the effect of oblique pole rotor, need emphasize, because two core segments are the axial and arrange, so that the axial of permanent magnet groove link up the design, and then be convenient for realize reducing the manufacturing cost in oblique pole rotor manufacturing process and provide production efficiency's effect.

In the technical scheme, one side of the tooth convex part, which is close to the rotor shaft, is provided with the positioning hole, and the center of each positioning hole is arranged in the middle of the tooth convex part in the circumferential direction relative to the rotor shaft.

In this technical scheme, set up the locating hole through one side on the tooth convex part to in the accuracy of guaranteeing the structure equipment man-hour, provide the installation effectiveness. It should be noted that the positioning hole is disposed at a position close to the axis, and the center of the positioning hole is defined to be located on the symmetry axis of two adjacent permanent magnet slots, that is, at the middle of the tooth convex portion in the circumferential direction relative to the rotor shaft, so as to facilitate the machining and positioning.

In the above technical solution, further comprising: and the permanent magnet is arranged in the permanent magnet groove.

In the technical scheme, the permanent magnets are arranged in the permanent magnet grooves, so that the permanent magnets are driven under the magnetic action of the permanent magnets, and the rotor structure can rotate relative to the stator to realize the normal operation of the motor.

It is emphasized that in this embodiment, the permanent magnet is an integral part.

An embodiment of a second aspect of the invention provides a motor structure comprising: a stator structure; as in the first aspect solution above, the rotor structure is disposed coaxially with the stator structure, and the rotor structure can rotate relative to the stator.

The motor structure provided by the embodiment of the second aspect of the present invention includes a stator structure and a rotor structure, wherein the rotor structure in the technical solution of the first aspect is disposed in the motor structure, so that the motor structure has the beneficial effects of any one of the rotor structures, and details are not repeated herein.

It should be emphasized that, because the motor structure includes the above-mentioned rotor structure, although the rotor core is provided in segments, the permanent magnet does not need to be segmented, on one hand, the manufacturing cost of the skewed pole rotor can be reduced, and on the other hand, the production efficiency can be improved.

Among the above-mentioned technical scheme, stator structure specifically includes: stator core and stator winding are equipped with a plurality of stator dogteeth on the stator core, and a plurality of stator dogteeth distribute around stator core's axis circumference, and stator winding is around establishing on the stator dogtooth.

In the technical scheme, the stator structure mainly comprises a stator core and a stator winding, and under the combined action of the stator core and the stator winding, a magnetic field for covering the rotor structure can be generated when the stator structure is electrified, so that the rotor structure is driven to rotate under the electromagnetic action.

The stator core is provided with stator convex teeth, a winding slot is formed between every two adjacent stator convex teeth, and the stator winding can be wound on the stator convex teeth so as to guarantee the normal operation of the motor.

An embodiment of a third aspect of the present invention provides an electronic apparatus, including: a housing; the motor structure in the above second aspect technical solution is disposed in the housing.

According to the electronic device provided by the embodiment of the third aspect of the present invention, the electronic device includes a housing and a motor structure disposed in the housing, and the motor structure in the technical solution of the second aspect is disposed in the electronic device, so that the electronic device has the beneficial effects of the motor structure, and details are not repeated herein.

The electronic devices include, but are not limited to, washing machines, dryers, compressors, outdoor units, air conditioners, etc. using motors.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 shows a schematic structural view of a rotor structure according to an embodiment of the invention;

FIG. 2 illustrates a schematic structural view of a rotor sheet according to an embodiment of the present invention;

FIG. 3 illustrates a schematic structural view of a first core segment according to one embodiment of the present invention;

FIG. 4 illustrates a schematic structural view of a second core segment according to one embodiment of the present invention;

FIG. 5 illustrates a schematic structural view of a rotor core according to an embodiment of the present invention;

fig. 6 shows a structural schematic of a motor structure according to an embodiment of the invention;

fig. 7 shows a schematic structural diagram of an electronic device according to an embodiment of the invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 7 is:

100: a rotor structure; 102: a rotor core; 1022: rotor punching sheets; 1024: a first core segment; 1026: a second core segment; 103: a permanent magnet slot; 104: a permanent magnet; 106: a rotor shaft; 108: a tooth projection; 1082: a first contour line; 1084: a second contour line; 1086: a third contour; 110: an axis of symmetry; 112: positioning holes; 200: a motor structure; 202: a stator structure; 204: a stator core; 300: an electronic device; 302: a housing.

Detailed Description

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

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, embodiments of the present invention may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.

Some embodiments according to the invention are described below with reference to fig. 1 to 7.

Example one

As shown in fig. 1, the present embodiment proposes a rotor structure 100 including a rotor core 102 and a rotor shaft 106 disposed in the rotor core 102. Specifically, the rotor core 102 is formed by laminating a plurality of rotor punching sheets 1022 arranged in a stacked manner in the axial direction of the rotor shaft 106, and by providing the permanent magnet slots 103 on the rotor punching sheets 1022, the permanent magnets 104 can be disposed in the permanent magnet slots 103 because the permanent magnet slots 103 penetrate through both end faces, which is convenient for the permanent magnets 104 to be driven by magnetic force. It should be emphasized that, by providing the tooth protrusion 108 between two adjacent permanent magnet slots 103, and defining that the tooth protrusions 108 of at least two rotor sheets 1022 in the plurality of rotor sheets 1022 cannot overlap when stacked, that is, projected contour lines of the tooth protrusions 108 of at least two rotor sheets 1022 do not overlap on a projection of an end surface of the rotor core 102, production cost in a manufacturing process of the skewed pole rotor can be effectively reduced and production efficiency can be improved, and specifically, the rotor structure 100 in the present solution can weaken air gap harmonics by characteristics of the skewed pole rotor, and at the same time, because the drill core is segmented, only one permanent magnet 104 can be inserted into the corresponding permanent magnet slot 103 and arranged along an axial direction of the rotor. In short, although the rotor core 102 is provided in segments, the permanent magnets 104 do not need to be segmented, which can reduce the manufacturing cost of the skewed pole rotor on one hand and improve the production efficiency on the other hand.

In particular, the permanent magnet slots 103 are directly penetrated through both end surfaces in the axial direction of the rotor core 102, and the teeth protrusions 108 may be arranged in a staggered manner.

There may be a plurality of permanent magnet slots 103, and generally, the plurality of permanent magnet slots 103 are uniformly arranged around the axis of the rotor core 102.

The extending direction of the permanent magnet slot 103 is the axial direction of the rotor core 102, so in this scheme, the number of the permanent magnets may be one, and one permanent magnet may be inserted into the permanent magnet slots of different rotor sheets.

In addition, for the permanent magnet slots 103, at least one of two ends may be through end faces, for example, both ends are through, or one end is through, but no matter what through relation, it is necessary to ensure that the permanent magnet slots are not staggered, so that one permanent magnet can be inserted into the permanent magnet slots of all the rotor sheets.

In addition, a positioning hole 112 is provided at one side on the tooth protrusion 108, so that the accuracy of the structural assembly is ensured during the machining, providing the installation efficiency. Specifically, the positioning hole 112 is disposed at a position close to the axis, and the center of the positioning hole 112 is defined on the symmetry axis 110 of two adjacent permanent magnet slots 103, that is, at the middle of the tooth protrusion 108 in the circumferential direction with respect to the rotor shaft 106, so as to facilitate the machining positioning.

Permanent magnets 104 are disposed in the permanent magnet slots 103 so as to be driven by the magnetic action of the permanent magnets 104, and the rotor structure 100 can rotate relative to the stator to realize the normal operation of the motor.

It is emphasized that in this embodiment, the permanent magnet 104 is a unitary body.

In this embodiment, as shown in fig. 3, 4 and 5, the rotor core 102 mainly includes two adjacent core segments, namely a first core segment 1024 and a second core segment 1026, and the outer contours of the rotor sheets 1022 in each core segment are the same, so as to ensure that the overall shape of each core segment is uniform, and to meet the special requirement for the structure of the built-in permanent magnet rotor, that is, the rotor cannot adopt a continuous oblique-pole manner.

At this time, the end face of the rotor core 102 is used as a projection plane, and the contour line of the tooth convex portion 108 on the first core segment 1024 on the projection plane is restricted from being misaligned with the contour line of the tooth convex portion 108 on the second core segment 1026 on the projection plane, so that the outer contours of the two core segments can have a certain offset design.

When two core segments are combined to form rotor core 102, it is necessary to limit that the two segments are adjacently arranged along the axial direction, so that whole rotor core 102 plays a role of a skewed pole rotor, and it is necessary to emphasize that two core segments are axially arranged so as to facilitate the axial through design of permanent magnet slots 103, and further facilitate the realization of reducing the production cost in the manufacturing process of the skewed pole rotor and providing the effect of production efficiency.

Example two

As shown in fig. 4 and 5, the present embodiment proposes a rotor structure 100 including a rotor core 102 and a rotor shaft 106 disposed in the rotor core 102. Specifically, the rotor core 102 is formed by laminating a plurality of rotor punching sheets 1022 arranged in a stacked manner in the axial direction of the rotor shaft 106, and by providing the permanent magnet slots 103 on the rotor punching sheets 1022, the permanent magnets 104 can be disposed in the permanent magnet slots 103 because the permanent magnet slots 103 penetrate through both end faces, which is convenient for the permanent magnets 104 to be driven by magnetic force. It should be emphasized that, by providing the tooth protrusion 108 between two adjacent permanent magnet slots 103, and defining that the tooth protrusions 108 of at least two rotor sheets 1022 in the plurality of rotor sheets 1022 cannot overlap when stacked, that is, projected contour lines of the tooth protrusions 108 of at least two rotor sheets 1022 do not overlap on a projection of an end surface of the rotor core 102, production cost in a manufacturing process of the skewed pole rotor can be effectively reduced and production efficiency can be improved, and specifically, the rotor structure 100 in the present solution can weaken air gap harmonics by characteristics of the skewed pole rotor, and at the same time, because the drill core is segmented, only one permanent magnet 104 can be inserted into the corresponding permanent magnet slot 103 and arranged along an axial direction of the rotor. In short, although the rotor core 102 is provided in segments, the permanent magnets 104 do not need to be segmented, which can reduce the manufacturing cost of the skewed pole rotor on one hand and improve the production efficiency on the other hand.

As shown in fig. 2, the tooth protrusion 108 can be regarded as a fan-like structure of the rotor core 102, and specifically, the circumferential outer contour of the tooth protrusion 108 includes a third contour line 1086, a first contour line 1082 and a second contour line 1084 which are connected, wherein the first contour line 1082 is disposed at a middle portion, and both ends are connected to a circumferential edge through the second contour line 1084 and the third contour line 1086, respectively, and the circumferential outer contour is a sidewall contour on a side away from the rotor shaft 106 in the radial direction of the rotor core 102. By defining the first contour line 1082, the second contour line 1084 and the third contour line 1086, the contour located at a more intermediate region is defined as the first contour line 1082, thereby facilitating subsequent definition of the location of the first contour line, and achieving harmonic attenuation of the skewed-pole rotor.

The first contour line 1082 is the section CD in fig. 2, the symmetry axis 110 is the line on which OB is located, and the center line of the first contour line 1082 is the line on which OA is located.

Further, the first contour line 1082 is asymmetric, and under the stacked arrangement of the plurality of rotor sheets 1022, the outer edge of the first core segment 1024 or the second core segment 1026 is regular, which is beneficial to processing, and meanwhile, the second contour line 1084 and the third contour line 1086 are defined to be close to the inner side, that is, the second contour line 1084 and the third contour line 1086 are enclosed by a virtual circle formed by the first contour line 1082, and the outermost point of the whole rotor sheet 1022 exists on the first contour line 1082, so that the magnetic performance of the rotor sheet 1022 can be improved under the action of the first contour line 1082.

EXAMPLE III

In a specific embodiment, the first angle between the contour center line and the symmetry axis 110 is half of the oblique angle between the first core segment 1024 and the second core segment 1026, where the first contour line 1082 on the first core segment 1024 is necessarily in an asymmetric arrangement, and the second core segment 1026 also needs to maintain a shape adapted to the first core segment 1024 to satisfy the above-mentioned angle relationship, specifically, the angle between the contour center line of the first contour line 1082 in the second core segment 1026 and the symmetry axis 110 is the same as the angle in the first core segment 1024, but the offset directions are opposite, that is, the first contour line 1082 on the first core segment 1024 is offset toward the front side, the first contour line 1082 on the second core segment 1026 is offset toward the rear side, and the offset magnitudes of the two core segments are the same.

Wherein the first angle is the included angle of the AOB in fig. 2.

In another specific embodiment, the end surface of the rotor core 102 is limited to a projection surface, the projection contour lines projected on the projection surface are respectively inverted in a mirror image manner by the tooth convex portion 108 of the first core segment 1024 and the tooth convex portion 108 of the second core segment 1026, at this time, during the machining, the first core segment 1024 and the second core segment 1026 are completely the same, and only one of the first core segment 1024 and the second core segment 1026 needs to be inverted to the other, so that the installation of the rotor core 102 having the function of the skewed pole rotor can be completed, and the manufacturing cost is greatly reduced.

The application also provides a specific oblique-pole rotor core, as shown in fig. 1 to 5, a plurality of core segments (i.e. a first core segment 1024 and a second core segment 1026) are coaxially and sequentially arranged, each core segment comprises a plurality of axially laminated punching sheets (i.e. rotor punching sheets 1022), each punching sheet is provided with a plurality of permanent magnet 104 mounting grooves (i.e. permanent magnet grooves 103) at intervals along the circumferential direction, the periphery of each punching sheet is provided with a plurality of outward convex parts (i.e. tooth convex parts 108) distributed along the circumferential direction, each outward convex part is asymmetric in the circumferential direction of the core segment, the outward convex parts of each core segment are overlapped, the outward convex parts on the plurality of core segments are staggered in the axial direction of the core segment, and the permanent magnet 104 mounting grooves on the plurality of core segments are overlapped in the axial direction of the core segment.

In addition, the core sheets of the cores of different segments are the same, and one of the core sheets is turned 180 degrees relative to the other core sheet in the axial direction of the skewed pole rotor core 102.

Furthermore, the outline of the convex part is provided with a main arc section CD and an auxiliary section connected with the main arc section CD, the main arc section CD is arranged concentrically with the shaft, and the auxiliary section is positioned on the inner side of a circle where the main arc section CD is positioned.

An included angle between a central line OA of the main arc segment CD and a physical central line (i.e., a symmetry axis) OB of the mounting groove of the adjacent permanent magnet 104 is θ, and an angle of a pole of the adjacent two iron cores is β, and θ is β/2.

Example four

As shown in fig. 6, a motor structure 200 provided in this embodiment includes a stator structure 202 and a rotor structure 100, and the rotor structure 100 can rotate relative to the stator structure 202, wherein the rotor structure 100 of any of the embodiments is disposed in the motor structure 200, so that the motor structure has the beneficial effects of any of the embodiments, and details are not repeated herein.

It should be emphasized that, since the motor structure 200 includes the above-mentioned rotor structure 100, although the rotor core is provided in segments, the permanent magnets do not need to be segmented, on one hand, the manufacturing cost of the skewed pole rotor can be reduced, and on the other hand, the production efficiency can be improved.

Further, the stator structure 202 mainly includes a stator core 204 and a stator winding, and under the combined action of the stator core 204 and the stator winding, when the stator winding is energized, a magnetic field is generated to cover the rotor structure, so that the rotor structure is driven to rotate under the electromagnetic action.

The stator core 204 is provided with stator convex teeth, a winding slot is formed between two adjacent stator convex teeth, and a stator winding can be wound on the stator convex teeth to ensure the normal operation of the motor.

EXAMPLE five

As shown in fig. 7, an electronic device 300 provided in this embodiment includes a housing 302 and a motor structure 200 disposed in the housing 302, and the motor structure 200 in the fourth embodiment is disposed in the housing 302, so that the electronic device has the beneficial effects of the motor structure 200, and details are not repeated herein.

According to the rotor structure, the motor structure and the electronic device provided by the invention, although the rotor iron core is arranged in a segmented manner, the permanent magnet does not need to be segmented, so that the manufacturing cost of the oblique-pole rotor can be reduced on one hand, and the production efficiency can be improved on the other hand.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotor structure, characterized in that, comprising:

a rotor iron core, the rotor iron core includes a plurality of stacked rotor punching pieces, and the plurality of the rotor punching pieces form at least one first iron core segment and at least one second iron core segment;

a rotor shaft, which is arranged on the rotor iron core, and the rotor iron core can rotate around the rotor shaft;

The rotor punching piece is provided with a plurality of permanent magnet slots, which penetrate two end faces of the rotor iron core along the axial direction of the rotor iron core;

Wherein, along the circumferential direction of the rotor punching piece, tooth protrusions are arranged between two adjacent permanent magnet slots, and on the projection of the end face of the rotor core, all the first core segments are The outer contours of the rotor punches are the same, the outer contours of all the rotor punches in the second core segment are the same, and the projected contours of the tooth protrusions of the rotor punches in the first core segment The line does not coincide with the projected contour line of the tooth convex portion of the rotor punching piece in the second core segment.

2 . The rotor structure according to claim 1 , wherein the side wall of the tooth convex portion on the side away from the rotor shaft along the radial direction of the rotor core comprises a first outline, a second contour lines and third contour lines;

Wherein, the second contour line and the third contour line are respectively connected with two ends of the first contour line, and the other end of the second contour line and the other end of the third contour line extend respectively to the circumferential edge of the tooth projection.

3 . The rotor structure according to claim 2 , wherein the two permanent magnet slots adjacent to the tooth protrusions are symmetrical about the axis of symmetry OB, and the first contour line is about the axis of symmetry OB Asymmetric, and the second contour line is located inside the virtual circle formed by the first contour line.

4 . The rotor structure according to claim 3 , wherein a line passing through the origin of the rotation center of the rotor punching piece and passing through the center point of the first contour line is the contour center line OA, and the contour A first angle ∠AOB is formed between the center line OA and the symmetry axis OB;

Wherein, on the end face of the rotor punching piece, a second angle is formed between the projection of the contour centerline of the first iron core segment and the contour centerline of the second iron core segment, and the second The angle is twice the first angle.

5 . The rotor structure according to claim 1 , wherein, on the end surface of the rotor core, the projected contour line of the tooth convex portion on the first core segment is the same as the second core segment. 6 . The projected contour of the tooth ridge on the upper is mirrored.

6 . The rotor structure according to claim 1 , wherein the first core segment and the second core segment are disposed adjacent to each other in the axial direction to form the rotor core. 7 .

7. The rotor structure according to any one of claims 1 to 6, wherein a positioning hole is provided on the side of the tooth convex portion close to the rotor shaft, and the center of each positioning hole is provided with a positioning hole. at the middle portion of the tooth convex portion relative to the rotor shaft in the circumferential direction.

8. The rotor structure according to any one of claims 1 to 6, characterized in that, further comprising:

The permanent magnet is arranged in the permanent magnet slot.

9. A motor structure, characterized in that, comprising:

stator structure;

The rotor structure according to any one of claims 1 to 8, which is arranged coaxially with the stator structure, and the rotor structure is capable of unidirectional or bidirectional rotation relative to the stator structure.

10. The motor structure according to claim 9, wherein the stator structure specifically comprises:

A stator iron core and a stator winding, the stator iron core is provided with a plurality of stator protruding teeth, the plurality of stator protruding teeth are circumferentially distributed around the axis of the stator iron core, and the stator winding is wound around the stator on the convex teeth.

11. An electronic device, characterized in that, comprising:

case;

The motor structure according to claim 9 or 10, provided in the housing.