CN208571728U - Stator core and rotating electric machine - Google Patents
Stator core and rotating electric machine Download PDFInfo
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- CN208571728U CN208571728U CN201820822240.3U CN201820822240U CN208571728U CN 208571728 U CN208571728 U CN 208571728U CN 201820822240 U CN201820822240 U CN 201820822240U CN 208571728 U CN208571728 U CN 208571728U
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- 238000004080 punching Methods 0.000 claims abstract description 110
- 238000003475 lamination Methods 0.000 claims description 24
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- 238000004804 winding Methods 0.000 claims description 3
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- 210000000515 tooth Anatomy 0.000 abstract 8
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
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- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
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- 238000009827 uniform distribution Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model proposes a kind of stator core and rotating electric machines, wherein, stator core includes: the stator punching of multiple stackings, stator punching includes circumferentially distributed multiple stator tooths, two adjacent stator tooths, which enclose, to be set to form stator slot, and two adjacent stator tooths have angular pitch, stator tooth radially successively includes teeth portion and tooth boot portion from outside to inside, multiple tooth boot portions, which are enclosed, sets the centre bore to form stator punching, gap between two adjacent tooth boot portions limits the notch of corresponding stator slot, wherein, auxiliary tank is offered on the inner wall of part tooth boot portion on stator punching, in a stack, at least two stator punchings circumferentially deflect setting, and deflection angle is angular pitch.By the technical solution of the utility model, the lowest spatial order component of radial electromagnetic force wave can reduce, to achieve the purpose that reduce the vibration noise of motor.
Description
Technical Field
The utility model relates to a motor field particularly, relates to a stator core and a rotating electrical machines.
Background
In the related art, a motor is widely applied to various production machines and equipment driven by the motor as an important energy conversion device, a rotating motor comprises a motor stator and a motor rotor, the motor rotor arranged in a compressor generally adopts a cantilever structure, and an air gap needs to be adjusted through tools such as a feeler gauge and the like in the process of mounting the rotor because the motor rotor is supported by a unilateral bearing.
In order to reduce the air gap magnetic field harmonic wave, the outer circular arc of the rotor is set to be an eccentric structure, so that the corresponding relation between the outer periphery of the rotor and the inner periphery of the stator is a point-to-surface relation, and the air gap precision is difficult to adjust.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one of the above technical problems, an object of the present invention is to provide a stator core.
It is still another object of the present invention to provide a rotating electrical machine.
In order to achieve the above object, an embodiment of the first aspect of the present invention provides a stator core, including: a plurality of stator punching of piling up, the stator punching includes a plurality of stator teeth along circumference distribution, two adjacent stator teeth enclose and establish and form the stator groove, and two adjacent stator teeth have the tooth pitch angle, the stator tooth includes tooth portion and tooth boots portion from radially outside to interior in proper order, a plurality of tooth boots portion enclose and establish the centre bore that forms the stator punching, the notch of corresponding stator groove is injectd to the clearance between two adjacent tooth boots portion, wherein, the auxiliary groove has been seted up on the inner wall of part tooth boots portion on the stator punching, in piling up, at least two stator punching deflect along circumference and set up, and the deflection angle is the tooth pitch angle.
In the technical scheme, a plurality of stator punching sheets in one form are laminated to generate a stator core, a plurality of stator teeth which are circumferentially arranged are arranged on the stator punching sheet, each stator tooth is correspondingly provided with a tooth part and a tooth shoe part, auxiliary grooves are formed in the inner walls of partial tooth shoe parts, any two laminated stator punching sheets are provided with an offset angle in the circumferential direction, the offset angle is a tooth pitch angle between two adjacent stator teeth, on the basis of meeting the requirement of forming the auxiliary grooves, the offset stator punching sheets are superposed to enable the auxiliary grooves on the offset stator punching sheets to be in different directions, so that the requirement of stacking in various forms can be realized only by adopting the stator punching sheets in one specification, on one hand, the vibration deformation generated by the stator core due to radial components is a main source of electromagnetic noise, and by forming the auxiliary grooves on partial tooth shoe parts, even if the corresponding relation between the outer periphery of the motor rotor and the inner periphery of the motor stator is in a point-to-point mode, the order of radial electromagnetic force waves can be improved by improving the stator slots, the deformation of the stator iron core is reduced, the lowest spatial order component of the radial electromagnetic force waves is further reduced, and the purpose of reducing the vibration noise of the motor is achieved.
It will be appreciated that the pitch angle is the angle between the centre lines of symmetry of two adjacent customised teeth, the magnitude of which is 360 divided by the number of stator teeth. Wherein, the number of the stator teeth can be 6, 9 or 12, etc.
In addition, the utility model provides a stator core in above-mentioned embodiment can also have following additional technical characterstic:
in the above technical solution, preferably, the inner wall of the tooth shoe portion of the stator punching sheet 2/3 is provided with an auxiliary groove correspondingly; the stator punching sheet comprises a plurality of groups of auxiliary grooves, each group of auxiliary grooves comprises two adjacent first auxiliary grooves, a stator full tooth is arranged between each group of auxiliary grooves at an interval, and the stator full tooth is a stator tooth without the auxiliary grooves.
In the technical scheme, because the number of the stator teeth on each stator punching sheet is usually a multiple of 3, 1/3 tooth boots can be selected on each stator punching sheet to be provided with the auxiliary grooves, two stator teeth without the auxiliary grooves are uniformly arranged between the auxiliary grooves at intervals, when the stator punching sheets are stacked, the 3 stator punching sheets can just form a plurality of auxiliary grooves which are uniformly distributed in the circumferential direction on a projection surface by arranging the stator punching sheets in an offset manner, and compared with a mode that the auxiliary grooves are correspondingly arranged on the inner walls of the tooth boots of 2/3 on the stator punching sheets, the improved requirements on the stator grooves are met, and the preparation process is simplified.
In the above technical solution, preferably, the inner wall of the tooth shoe portion of the stator punching sheet 1/3 is provided with an auxiliary groove correspondingly; two stator full teeth are arranged between every two adjacent auxiliary grooves at intervals, and the stator full teeth are stator teeth without the auxiliary grooves.
In the technical scheme, because the number of the stator teeth on each stator punching sheet is usually a multiple of 3, 2/3 tooth boots can be selected on each stator punching sheet to be provided with auxiliary grooves, every two auxiliary grooves are uniformly arranged in a group along the circumferential direction, a stator tooth without an auxiliary groove is arranged between each group of auxiliary grooves at an interval, and when the stator punching sheets are stacked, the stator punching sheets are arranged in an offset manner, so that a plurality of auxiliary grooves which are uniformly distributed in the circumferential direction are just formed on a projection plane of the two stator punching sheets, and the requirement for improving the stator grooves is met.
In the above technical solution, preferably, the stator teeth are of a symmetrical structure, and the auxiliary slot on each stator tooth is symmetrically arranged with respect to a symmetry center line of the stator tooth.
In this technical scheme, all have the symmetry axis to every stator tooth to construct the axial symmetry structure with the stator tooth, through seting up the auxiliary tank on the symmetry axis, construct the axial symmetry structure for the symmetry axis symmetry with the auxiliary tank, on the one hand, be favorable to making the structure regularization setting of auxiliary tank, in order to promote the auxiliary function of auxiliary tank to the stator groove, improve the degree of adaptability of groove, on the other hand, also can promote the convenience of auxiliary tank preparation.
In any of the above technical solutions, preferably, the auxiliary groove is any one of a semicircular groove, a rectangular groove, a trapezoidal groove, and a triangular groove, or a combination of any two of them.
In this technical scheme, through the shape of injecing the auxiliary tank, can guarantee on the one hand that preparation is convenient, on the other hand, the auxiliary tank of the above-mentioned structure of adoption back compares before adopting the auxiliary tank, can promote the efficiency that weakens the tooth's socket pulsation.
Preferably, the auxiliary grooves are formed by combining trapezoids and rectangles from outside to inside in the radial direction, and filleted transitions are adopted at included corners.
In any of the above solutions, it is preferable that the width of the notch is W1, the radial width of the tooth shoe is H1, the width of the auxiliary groove is W2, and the radial maximum depth of the auxiliary groove is H2, wherein,
in the technical scheme, by limiting the ratio range of W2 and W1 and the ratio range of H2 and H1, on one hand, the size of the auxiliary groove is optimized to reduce the lowest spatial order component of the radial electromagnetic force wave to the maximum extent, and on the other hand, the auxiliary groove can be prevented from being influenced by the increase of the magnetic resistance caused by the overlarge air gap generated by the overlarge radial size and width size.
In a preferred embodiment, W2 is identical to W1 and H2 is identical to H1.
In any one of the above technical solutions, preferably, the plurality of stator laminations are stacked along the axial direction from top to bottom along the same direction by sequentially deflecting the pitch angle.
In the technical scheme, as a specific overlapped implementation mode, the plurality of stator punching sheets can be sequentially deflected by a pitch angle from top to bottom or from bottom to top in a clockwise direction or a counterclockwise direction and then are overlapped, for a scheme that the inner wall of the tooth boot part of 2/3 on each stator punching sheet is correspondingly provided with the auxiliary groove, three adjacent stator punching sheets are in a group, namely the fourth stator punching sheet is in the same position as the first stator punching sheet, and for a scheme that the inner wall of the tooth boot part of 1/3 on each stator punching sheet is correspondingly provided with the auxiliary groove, the three adjacent stator punching sheets are in a group, namely the fourth stator punching sheet is in the same position as the first stator punching sheet, so that on one hand, the circumferential uniform distribution of the auxiliary grooves is realized, and on the other hand, the reduction of the lowest spatial order component of the radial force is facilitated.
In any of the above technical solutions, preferably, the method further includes: the multi-group stator punching segment comprises a plurality of stator punching sheets, each group of stator punching sheet segments comprises a plurality of stator punching sheets, auxiliary grooves in the plurality of stator punching sheets in each group of stator punching sheets are arranged in a corresponding mode along the axial direction one by one, and the multi-group stator punching sheets are butted along the axial direction from top to bottom along the angle of a pitch angle deflected in the same direction in sequence.
In this technical solution, as another specific stacked embodiment, a plurality of continuously arranged stator punching sheets with the same offset angle are used as a set of punching segments, and for a scheme in which an auxiliary groove is correspondingly formed on an inner wall of a tooth shoe portion of 2/3 on the stator punching sheet or a scheme in which an auxiliary groove is correspondingly formed on an inner wall of a tooth shoe portion of 1/3 on the stator punching sheet, the stator punching sheets can be divided into three sets of punching segments according to the offset angle, and then the three sets of punching segments are butt-stacked, so that the purpose of reducing the vibration noise of the motor can be achieved.
An embodiment of the second aspect of the present invention provides a rotating electrical machine, including: the utility model discloses the stator core that the technical scheme of the first aspect provided and winding that is around locating on the stator core; and the motor rotor is sleeved and assembled with the central hole of the motor stator.
In the technical scheme, the offset stator punching sheets are overlapped, so that the auxiliary slots on the offset stator punching sheets are in different directions, and the stacking requirements of various forms can be realized only by adopting the stator punching sheets of one specification.
In the above technical solution, preferably, a cross-sectional profile of the motor rotor perpendicular to the axis is formed by a plurality of eccentric arcs eccentric with respect to the central hole and concentric arcs concentric with the central hole in a circumferentially end-to-end connection configuration.
In this technical scheme, in order to reduce air gap magnetic field harmonic, with electric motor rotor and axis vertically cross sectional profile by many relative centre bore eccentric circular arcs and with the concentric circular arc of centre bore along circumference end to end connection structure formation, on the one hand, combine the setting of auxiliary tank, be favorable to further reducing air gap magnetic field harmonic, on the other hand, set up the second stator punching through at least one end at stator core, can make furthest realize the face-to-face correspondence between stator core and electric motor rotor's the outer wall, thereby be favorable to adopting frock adjustment gas such as clearance gauge, and then promote the concentricity between stator core and the rotor, in order to reach the mesh of adjustment air gap precision and reduction electromagnetic noise.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic perspective view of a first direction of a stator core according to an embodiment of the invention;
fig. 2 shows a schematic perspective view of a second direction of a stator core according to an embodiment of the present invention;
fig. 3 shows a schematic plan structure diagram of a first stator lamination according to an embodiment of the present invention;
fig. 4 shows a schematic perspective view of a first stator lamination according to an embodiment of the present invention;
fig. 5 shows a schematic plan view of a second stator lamination according to an embodiment of the present invention;
fig. 6 shows a schematic perspective view of a second stator lamination according to an embodiment of the present invention;
fig. 7 shows a schematic plan view of a rotating electric machine according to an embodiment of the present invention;
fig. 8 shows a schematic plan view of an electric machine rotor according to an embodiment of the invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 8 is:
10 stator core, 102 first stator punching sheet, 104 second stator punching sheet, 1022 first tooth part, 1024 first tooth shoe part, 1026 first auxiliary groove, 1042 second tooth part, 1044 second tooth shoe part, 1046 second auxiliary groove, 20 motor rotor, 202 concentric circular arc, 204 eccentric circular arc, 206 magnetic steel groove, 208 shaft hole.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail 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 invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A stator core according to some embodiments of the present invention is described below with reference to fig. 1 to 8.
As shown in fig. 1 and 2, a stator core 10 according to an embodiment of the present invention includes: a plurality of stator punching of piling up, the stator punching includes a plurality of stator teeth along circumference distribution, two adjacent stator teeth enclose and establish and form the stator groove, and two adjacent stator teeth have the tooth pitch angle, the stator tooth includes tooth portion and tooth boots portion from radially outside to interior in proper order, a plurality of tooth boots portion enclose and establish the centre bore that forms the stator punching, the notch of corresponding stator groove is injectd to the clearance between two adjacent tooth boots portion, wherein, the auxiliary groove has been seted up on the inner wall of part tooth boots portion on the stator punching, in piling up, at least two stator punching deflect along circumference and set up, and the deflection angle is the tooth pitch angle.
In this embodiment, a plurality of stator laminations of one type are laminated to generate a stator core 10, a plurality of stator teeth are circumferentially arranged on the stator laminations, each stator tooth is correspondingly provided with a tooth part and a tooth shoe part, an auxiliary groove is formed on the inner wall of part of the tooth shoe parts, and any two laminated stator laminations are provided with an offset angle in the circumferential direction, wherein the offset angle is a tooth pitch angle between two adjacent stator teeth, on the basis of meeting the requirement of forming the auxiliary groove, the offset stator laminations are overlapped to enable the auxiliary grooves on the offset stator laminations to be in different directions, so that the requirement of stacking in various types can be realized only by adopting the stator laminations of one type, on one hand, the vibration deformation generated by the stator core 10 due to the radial component is a main source of electromagnetic noise, and by forming the auxiliary grooves on part of the tooth shoe parts, even if the corresponding relation between the outer periphery of the motor rotor and the inner periphery of the motor stator is in a point-to-point mode, the order of radial electromagnetic force waves can be improved by improving the stator slots, the deformation of the stator core 10 is reduced, and the lowest spatial order component of the radial electromagnetic force waves is further reduced, so that the aim of reducing the vibration noise of the motor is fulfilled.
It will be appreciated that the pitch angle is the angle between the centre lines of symmetry of two adjacent customised teeth, the magnitude of which is 360 divided by the number of stator teeth. Wherein, the number of the stator teeth can be 6, 9 or 12, etc.
In addition, the present invention provides the stator core 10 in the above embodiment, which may further have the following additional technical features:
as shown in fig. 3 and 4, according to an embodiment of the present application, the stator punching sheet is a first stator punching sheet 102 having a first auxiliary slot opening manner, a stator tooth of the first stator punching sheet 102 sequentially includes a first tooth portion 1022 and a first tooth shoe portion 1024 from outside to inside in a radial direction, and an inner wall of at least one first tooth shoe portion 1024 is provided with a first auxiliary slot 1026.
The inner wall of the tooth boot part of 2/3 is correspondingly provided with an auxiliary groove; the stator punching sheet comprises a plurality of groups of auxiliary grooves, each group of auxiliary grooves comprises two adjacent first auxiliary grooves 1026, a stator full tooth is arranged between each group of auxiliary grooves at an interval, and the stator full tooth is a stator tooth without the auxiliary grooves.
In this embodiment, because the number of the stator teeth on each stator punching sheet is usually a multiple of 3, 1/3 tooth shoe portions can be selected on each stator punching sheet to form auxiliary grooves, and two stator teeth without the auxiliary grooves are uniformly formed between the auxiliary grooves at intervals.
As shown in fig. 5 and fig. 6, according to another embodiment of the present application, the stator lamination is a second stator lamination 104 having a second auxiliary groove opening manner, a stator tooth of the second stator lamination 104 sequentially includes a second tooth 1042 and a second tooth shoe 1044 from outside to inside in a radial direction, and a second auxiliary groove 1046 is formed on an inner wall of at least one second tooth shoe 1044.
Auxiliary grooves are correspondingly formed in the inner walls of the tooth boots of the 1/3 on the second stator punching sheet 104; two stator full teeth are arranged between every two adjacent auxiliary grooves at intervals, and the stator full teeth are stator teeth without the auxiliary grooves.
In this embodiment, because the number of the stator teeth on each stator lamination is usually a multiple of 3, 2/3 tooth boots can be selected on each stator lamination to open auxiliary slots, and each two of the auxiliary slots are uniformly opened in a group along the circumferential direction, a stator tooth without an auxiliary slot is spaced between each group of auxiliary slots, and when stacking, the stator laminations are arranged in an offset manner, so that the two stator laminations just form a plurality of auxiliary slots uniformly distributed in the circumferential direction on the projection plane, thereby meeting the improvement requirement of the stator slots.
In the above embodiment, preferably, the stator teeth are of a symmetrical structure, and the auxiliary groove for each stator tooth is symmetrically arranged with respect to a center line of symmetry of the stator tooth.
In this embodiment, each stator tooth has a symmetrical center line, so that the stator tooth is constructed to be an axisymmetric structure, and the auxiliary groove is formed on the symmetrical center line, so that the auxiliary groove is constructed to be an axisymmetric structure symmetrical with respect to the symmetrical center line.
In any of the above embodiments, preferably, the auxiliary groove is any one of a semicircular groove, a rectangular groove, a trapezoidal groove and a triangular groove, or a combination of any two of them.
In this embodiment, by defining the shape of the auxiliary groove, on the one hand, the convenience of manufacture can be ensured, and on the other hand, the efficiency of attenuating the cogging pulsation can be improved when the auxiliary groove of the above-described structure is used later than when the auxiliary groove is used earlier.
Preferably, the auxiliary grooves are formed by combining trapezoids and rectangles from outside to inside in the radial direction, and filleted transitions are adopted at included corners.
The first auxiliary slot 1026 formed in the first stator lamination 102 has the same shape as the second auxiliary slot 1046 formed in the second stator lamination 104.
In any of the above embodiments, as shown in figure 3, it is preferred that the width of the notch is W1, the radial width of the tooth shoe is H1, the width of the first auxiliary groove 1026 is W2, the radial maximum depth of the first auxiliary groove 1026 is H2,
as shown in fig. 5, the width of the second auxiliary groove 1046 is also W2, the maximum radial depth of the second auxiliary groove 1046 is also H2,
in this embodiment, by limiting the ratio range of W2 to W1 and the ratio range of H2 to H1, on one hand, the size of the first auxiliary slot 1026 is optimized to minimize the lowest spatial order component of the radial electromagnetic wave, and on the other hand, the first auxiliary slot 1026 is prevented from affecting the operation efficiency of the motor due to the increase of the magnetic resistance caused by the excessively large air gap generated by the excessively large radial size and width size.
In this embodiment, by limiting the ratio range of W3 to W1 and the ratio range of H3 to H1, on one hand, the size of the second auxiliary slot 1046 is optimized to reduce the lowest spatial order component of the radial electromagnetic wave to the maximum, and on the other hand, the second auxiliary slot 1046 is prevented from generating an air gap with too large size due to too large radial size and width size, so that the magnetic resistance is increased to affect the operation efficiency of the motor.
In a preferred embodiment, W3 and W2 are the same as W1, and H3 and H2 are the same as H1. In any of the above embodiments, preferably, the plurality of stator laminations are stacked along the axial direction from top to bottom along the same direction by a pitch angle.
As shown in fig. 1, in this embodiment, as a specific stacked embodiment, multiple stator punching sheets may be stacked after being sequentially deflected by a pitch angle from top to bottom or from bottom to top in a clockwise direction or a counterclockwise direction, and for a scheme that the first auxiliary groove 1026 is correspondingly formed on the inner wall of the tooth shoe portion of the stator punching sheet 2/3, three adjacent stator punching sheets are in a group, that is, the position of the fourth stator punching sheet is the same as that of the first stator punching sheet.
In addition, for the scheme that auxiliary grooves are correspondingly formed in the inner walls of the tooth boot parts of the stator punching sheets 1/3, similarly, three adjacent stator punching sheets are in a group, namely, the fourth stator punching sheet and the first stator punching sheet are in the same position, so that circumferential uniform distribution of the auxiliary grooves is realized, and on the other hand, the lowest spatial order component of the radial force is favorably reduced.
In any of the above embodiments, preferably, the method further includes: the multi-group stator punching segment comprises a plurality of stator punching sheets, each group of stator punching sheet segments comprises a plurality of stator punching sheets, auxiliary grooves in the plurality of stator punching sheets in each group of stator punching sheets are arranged in a corresponding mode along the axial direction one by one, and the multi-group stator punching sheets are butted along the axial direction from top to bottom along the angle of a pitch angle deflected in the same direction in sequence.
In this embodiment, as another specific stacking embodiment, a plurality of continuously arranged stator punching sheets with the same offset angle are used as a set of punching segments, and for a scheme that an auxiliary groove is correspondingly formed in the inner wall of the tooth shoe portion of 2/3 on the stator punching sheet or a scheme that an auxiliary groove is correspondingly formed in the inner wall of the tooth shoe portion of 1/3 on the stator punching sheet, the stator punching sheets can be divided into three sets of punching segments according to the offset angle, and then the three sets of punching segments are butt-stacked, so that the purpose of reducing the vibration noise of the motor can be achieved.
As shown in fig. 7 and 8, the rotating electric machine according to the embodiment of the present invention includes: the stator core 10 and the winding wound on the stator core 10 according to any of the embodiments above; the motor rotor 20 is sleeved with the central hole of the motor stator.
Through the stator punching to the skew superposes to make the auxiliary tank on the stator punching of skew be in different position, and then realized only adopting the stator punching of a specification can realize the demand of piling up of multiform, on the one hand, because the vibration deformation that radial component made stator core 10 produce is the main source of electromagnetic noise, through seting up the auxiliary tank on part tooth boots portion, even when the correspondence between the periphery of motor rotor and the interior circumference of motor stator is the point-to-surface, still can be through improving the order of stator tank in order to improve radial electromagnetic force ripples, reduce stator core's deformation, and then reduce the minimum space order component of radial electromagnetic force ripples, in order to reach the purpose that reduces the vibration noise of motor.
In the above embodiment, it is preferable that the cross-sectional profile of the motor rotor 20 perpendicular to the axis is formed by a plurality of eccentric circular arcs 204 eccentric with respect to the center hole and concentric circular arcs 202 concentric with the center hole in a circumferentially end-to-end configuration.
As shown in fig. 8, the motor rotor is formed by laminating a plurality of rotor cores, and the outer contour of each rotor core is formed by connecting end-to-end arcs with different circle centers, and includes a concentric arc 202 concentric with a shaft hole 208, an eccentric arc 204, and the like, and in addition, a magnetic steel groove 206 for accommodating magnetic steel is further provided.
In this embodiment, in order to reduce the air gap magnetic field harmonic wave, the cross-sectional profile of the motor rotor 20 perpendicular to the axis is formed by a plurality of arcs eccentric to the central hole and arcs concentric with the central hole along the circumferential end-to-end connection structure, on one hand, the air gap magnetic field harmonic wave is further reduced by combining the arrangement of the auxiliary slot 1026, on the other hand, the second stator punching sheet 104 is arranged at least one end of the stator core 10, so that the surface-to-surface correspondence between the outer walls of the stator core 10 and the motor rotor 20 can be realized to the maximum extent, thereby being beneficial to adopting tooling such as a feeler gauge to adjust gas, further improving the concentricity between the stator core 10 and the rotor, and achieving the purposes of adjusting the air gap precision and reducing.
In the present application, the terms "first", "second", "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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present specification, 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 (10)
1. A stator core, comprising:
a plurality of stacked stator laminations, each stator lamination comprising a plurality of stator teeth distributed along the circumferential direction, two adjacent stator teeth being surrounded to form a stator slot and having a pitch angle, the stator teeth sequentially comprising a tooth portion and a tooth shoe portion from outside to inside along the radial direction, the tooth shoe portions being surrounded to form a central hole of the stator lamination, a gap between two adjacent tooth shoe portions defining a notch of the corresponding stator slot,
the stator punching sheet comprises a tooth boot part, auxiliary grooves are formed in the inner walls of the tooth boot part, at least two stator punching sheets are arranged in a deflected mode along the circumferential direction in the stacking process, and the deflection angle is the tooth pitch angle.
2. The stator core according to claim 1,
the inner wall of the tooth boot part of the stator punching sheet 2/3 is correspondingly provided with the auxiliary groove;
the stator punching sheet comprises a plurality of groups of auxiliary grooves, each group of auxiliary grooves comprises two adjacent first auxiliary grooves, a stator full tooth is arranged between each group of auxiliary grooves at an interval, and the stator full tooth is the stator tooth without the auxiliary grooves.
3. The stator core according to claim 1,
the inner wall of the tooth boot part of the stator punching sheet 1/3 is correspondingly provided with the auxiliary groove;
two full stator teeth are arranged between every two adjacent auxiliary grooves at intervals, and the full stator teeth are the stator teeth without the auxiliary grooves.
4. The stator core according to claim 1,
the stator teeth are of a symmetrical structure, and the auxiliary grooves on each stator tooth are symmetrically arranged relative to the symmetrical center line of the stator teeth.
5. The stator core according to claim 4,
the auxiliary groove is any one of a semicircular groove, a rectangular groove, a trapezoidal groove and a triangular groove.
6. The stator core according to claim 1,
the width of the notch is W1, the radial width of the tooth shoe is H1, the width of the auxiliary groove is W2, the radial maximum depth of the auxiliary groove is H2,
wherein,
7. the stator core according to any one of claims 2 to 6,
and a plurality of stator punching sheets sequentially deflect along the same direction from top to bottom along the axial direction, and the angle of the pitch angle is superposed and pressed.
8. The stator core according to any one of claims 2 to 6, further comprising:
a plurality of groups of stator punching segments, wherein each group of stator punching segments comprises a plurality of stator punching sheets, the auxiliary grooves on the plurality of stator punching sheets in each group of stator punching segments are arranged one by one along the axial direction,
and the multiple groups of stator punching segments sequentially deflect in the same direction from top to bottom along the axial direction, and the tooth pitch angles are butted.
9. A rotating electrical machine, characterized by comprising:
a motor stator including a stator core according to any one of claims 1 to 8 and a winding wound around the stator core;
and the motor rotor is sleeved and assembled with the central hole of the motor stator.
10. The rotating electric machine according to claim 9,
the cross section outline of the motor rotor perpendicular to the axis is formed by a plurality of eccentric circular arcs eccentric relative to the central hole and concentric circular arcs concentric with the central hole in a structure of end-to-end connection in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820822240.3U CN208571728U (en) | 2018-05-30 | 2018-05-30 | Stator core and rotating electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820822240.3U CN208571728U (en) | 2018-05-30 | 2018-05-30 | Stator core and rotating electric machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108512320A (en) * | 2018-05-30 | 2018-09-07 | 广东威灵电机制造有限公司 | Stator core and electric rotating machine |
| FR3128073A1 (en) | 2021-10-12 | 2023-04-14 | Nidec Psa Emotors | Stator of rotating electric machine |
| WO2024060681A1 (en) * | 2022-09-20 | 2024-03-28 | 精进电动科技股份有限公司 | Permanent magnet motor and electric drive system |
-
2018
- 2018-05-30 CN CN201820822240.3U patent/CN208571728U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108512320A (en) * | 2018-05-30 | 2018-09-07 | 广东威灵电机制造有限公司 | Stator core and electric rotating machine |
| FR3128073A1 (en) | 2021-10-12 | 2023-04-14 | Nidec Psa Emotors | Stator of rotating electric machine |
| WO2024060681A1 (en) * | 2022-09-20 | 2024-03-28 | 精进电动科技股份有限公司 | Permanent magnet motor and electric drive system |
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