Motor stator core structure

Abstract

The utility model relates to a motor stator core structure, the stator core structure is matched with a winding to form a stator assembly, the stator core structure comprises an iron core winding notch, and the iron core winding notch is provided with a chamfer structure at the contact part of two end parts and the winding along the height direction of the stator core. The chamfer structure is a bevel angle or fillet structure used for protecting insulation of the enameled wire in the winding process. Compared with the prior art, the utility model has the advantages that the winding can be directly carried out on the stator core under the condition of not adding extra parts such as an insulating framework, the cost is reduced, the winding slot fullness rate and the motor performance are improved, and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of motors, in particular to a kind of motor stator core structure. BACKGROUND

[0002] The processing method of the existing technology for the winding slot of the stator core is usually as follows:

[0003] Because the slot of the last stamping sheet cannot be processed when the stator stamping sheet is stamped and riveted, in order to ensure the insulation reliability of the core winding, the motor core in the industry currently needs to be insulated before winding. The conventional core insulation includes an insulation frame scheme, a stator core insulation paper scheme and an insulation scheme by injection molding on the core. Through retrieval, Chinese Patent Publication No. CN221467468U discloses a motor insulation framework structure, which includes an insulation framework connected with a core. The insulation framework is provided with three three-phase terminals. The insulation framework is annular. At least two guide positioning columns are uniformly distributed at the top end of the insulation framework. The insulation framework is provided with three terminal fixing grooves for fixing the three-phase terminals. The inner side of the insulation framework is connected with six wire rack teeth. At the same time, Chinese Patent Publication No. CN221767806U discloses a stator core insulation paper quick insertion structure, which includes an upper framework and a lower framework, an inner tooth portion of a stator core, a slot paper arranged between adjacent tooth portions, a first protruding device arranged along the inner wall circumference of the upper framework, a second protruding device arranged along the inner wall circumference of the lower framework, the first protruding device including a first protruding portion and a second protruding portion, a first boss symmetrically arranged on both sides of each second protruding portion, the first boss being arranged above the tooth portion, the height value of the first boss being less than the height value of the second protruding portion, the thickness value of the first boss being less than the thickness value of the second protruding portion, the side plane of the first boss close to the inner wall of the upper framework being in a coincident state with the side plane of the second protruding portion close to the inner wall of the upper framework, and a phase separation paper arranged in each slot paper.

[0004] The above-mentioned prior art scheme has two problems. On the one hand, the increase of the insulation height of the end portion increases the height of the entire core assembly. On the other hand, the thickness of the insulation layer in the slot is greater than or equal to 0.25 mm, which affects the slot fill factor of the core winding, increases the copper loss of the motor, and reduces the performance of the motor. This is particularly serious for small-sized and high-power-density motor stators.

[0005] Therefore, how to design a scheme that can ensure that the contact sharp angle does not scratch the enameled wire and also solve the problem of insulation thickness has become a technical problem to be solved. UTILITY MODEL CONTENTS

[0006] The utility model aims to overcome the defects of the prior art and provides a motor stator core structure.

[0007] The utility model discloses a purpose can be realized through the following technical scheme:

[0008] According to an aspect of the utility model, a kind of motor stator core structure is provided, the stator core structure and winding cooperation constitute stator assembly, the stator core structure includes core wire slot, the position of the two end parts of the core wire slot along stator core height direction and the contact part of winding is equipped with chamfer structure, the chamfer structure is the bevel or round corner structure for protecting enameled wire insulation during winding.

[0009] As preferred technical scheme, the partial or or all of the core wire slot is equipped with insulation protective layer.

[0010] As preferred technical scheme, the insulation protective layer is the insulation protective layer obtained in the mode of electrophoretic coating, insulation material spraying, insulation material dipping, insulation coating.

[0011] As preferred technical scheme, the chamfer structure is the chamfer structure obtained in the mode of removing sharp edge processing.

[0012] As preferred technical scheme, the end of the stator core structure adopts insulation skeleton.

[0013] As preferred technical scheme, the stator core structure is integral structure or block structure.

[0014] As preferred technical scheme, the stator core of the block structure is integrated into integral structure by laser welding, or glue pouring, or laser welding and glue pouring integration scheme.

[0015] Compared with prior art, the utility model has the following advantages:

[0016] 1) the utility model removes sharp burr to last piece of punching piece of the wire slot of stator core, and designs chamfer, and simultaneously, through electrophoresis or coating etc.

[0017] 2) the utility model can guarantee that contact sharp angle stings enameled wire, and also can solve insulation thickness problem, under the premise of not increasing additional structure such as insulation skeleton, guarantee to meet the qualified pressure insulation, greatly improve motor stator wire slot fullness. DRAWINGS

[0018] Figure 1 It is the structure schematic view before chamfering of split type stator core wire slot;

[0019] Figure 2 It is the structure schematic view of B part of Figure 1 ;

[0020] Figure 3 Figure 2 is a structure schematic view of the split stator core winding slot chamfer of the present application;

[0021] Figure 4 Figure 3 is an enlarged structure schematic view of A part of figure 2; Figure 3

[0022] Figure 5 Figure 4 is a winding schematic view of the two end parts of the core height direction and the winding contact part after removing the sharp edge and the slot insulation treatment;

[0023] Figure 6 Figure 5 is a schematic view of the split core winding after being spliced into a whole circle;

[0024] Figure 7 Figure 6 is a schematic view of the whole core glue pouring after winding according to the present application;

[0025] Figure 8 Figure 7 is a structure schematic view of the split stator core winding slot chamfer of the present application;

[0026] Figure 9 Figure 8 is a structure schematic view of the whole stator core winding slot chamfer of the present application.

[0027] Wherein 1 is the winding slot before chamfering, 2 is the chamfer structure, 3 is the winding, 4 is the whole stator core, 5 is the whole core after glue pouring treatment, 6 is the upper end part, 7 is the core winding slot, 8 is the lower end part, 61 is the stator yoke part, and 62 is the stator tooth part. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0029] Embodiment 1

[0030] As Figure 3 and 4 ​As shown, a motor stator core structure cooperates with a winding to form a stator assembly, the stator core structure comprises a core winding slot 7, and a chamfer structure 2 is arranged at the position of the winding contact part at the two ends of the stator core height direction, the chamfer structure 2 is an inclined angle or a round angle structure for protecting the insulation of the enameled wire during winding, after the local or overall insulation treatment of the stator winding slot position, the additional components such as the insulation framework, the insulation paper and the like can be omitted, the effective winding space is improved, the winding slot fullness is improved, the cost is reduced, and the performance of the motor is improved.

[0031] The local or overall of the core winding slot is provided with an insulation protective layer, and the insulation protective layer is obtained by adopting an electrophoretic coating, an insulation material spraying, an insulation material dipping or an insulation coating.

[0032] The chamfer structure is obtained by removing the sharp edge treatment.

[0033] The end of the stator core structure adopts an insulation framework, and the insulation framework can also be omitted.

[0034] The stator core structure is a whole structure or a split structure. The core is wound, if the core is a whole structure, the winding is whole winding, if the core is a split structure, the winding is performed on a single core, and then the whole core is spliced, or the winding is performed on multiple cores, and then the whole core is spliced, the split core can be spliced into a whole structure by laser welding, or by glue filling, or by a laser and glue filling integrated scheme.

[0035] The motor stator core structure of the utility model can directly wind on the stator core without increasing additional components such as an insulation framework, reduce the cost, improve the winding slot fullness and the performance of the motor.

[0036] Embodiment 2

[0037] The embodiment is used for the winding slot processing process of the motor stator core structure described in embodiment 1, the sharp edge treatment is performed on the position of the winding contact part at the two ends of the core height direction of the core winding slot, an inclined angle or a round angle of a certain size is formed, and the insulation of the enameled wire during winding is protected.

[0038] After the sharp edge treatment, the local or overall of the core winding slot is subjected to insulation treatment, the insulation treatment adopts an electrophoretic coating, an insulation material spraying, an insulation material dipping or an insulation coating, and an insulation protective layer is formed on the local or overall of the stator core winding slot. The sharp edge treatment adopts laser treatment, mechanical processing or corrosion treatment.

[0039] As shown in FIG. 1, the motor stator core structure comprises a core 1, a winding 2 and a winding slot 3. Figure 3 andFigure 4 As shown, since the position of the two ends of the core height direction of the stator core winding slot notch is chamfered, see Figure 8 and Figure 9 The chamfering processing diagram, remove the sharp angle produced when the punching, (the schematic diagram before chamfering design see Figure 1 and Figure 2 ).

[0040] On this basis, the winding slot notch of the core is partially or entirely insulated, and winding can be directly implemented, which greatly improves the slot fill rate of winding, reduces the cost, and improves the performance of the motor.

[0041] Figure 5 The position of the two ends of the core height direction and the winding contact part is removed from the sharp edge, and the winding diagram after the insulation treatment in the slot, the scheme mentioned in the utility model can avoid the injury of the enameled wire, ensure the durability and insulation characteristics of the enameled wire; Figure 6 is split core winding and then spliced into a whole circle, here is an example of split core, if it is a whole core, winding can be done according to the scheme of the utility model, without the need for whole splicing; Figure 7 is a whole core filled with glue after winding according to the utility model, the whole core has better assembly after filling with glue, of course, the split core spliced into a whole core and the whole core without split can also be treated without filling with glue.

[0042] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the utility model, and these modifications or replacements should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. An electric machine stator core structure, which constitutes a stator assembly in cooperation with a winding, characterized by, The stator core structure comprises core winding notches, and the two ends of the core winding notches along the height direction of the stator core are provided with chamfer structures at the positions of the winding contact parts, and the chamfer structures are bevel or round structures for protecting the insulation of the enameled wire during winding.

2. The stator core structure of the electric motor according to claim 1, characterized by Part or all of the core winding notches are provided with insulation protection layers.

3. The stator core structure of the electric motor according to claim 2, characterized by The insulation protection layer is obtained by electrophoretic coating, spraying of insulation material, impregnation of insulation material, or insulation coating.

4. The stator core structure of the electric motor according to claim 1, characterized by The chamfer structure is obtained by removing the sharp edge.

5. The stator core structure of the electric motor according to claim 1, wherein The end of the stator core structure adopts an insulation skeleton.

6. The stator core structure of the electric motor according to claim 1, wherein The stator core structure is a whole structure or a split structure.

7. The stator core structure of the electric motor according to claim 6, wherein The split structure of the stator core is integrated into a whole structure by laser welding, or glue pouring, or a combination of laser welding and glue pouring.

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