Stator and series excited motor

Abstract

The embodiment of the utility model provides a stator and a series excited motor, the stator comprises a stator core, the inner surface of the stator core at least comprises two wire slots and a clamping area located between the two wire slots; the two ends of the insulation paper are placed in the two adjacent wire grooves respectively, and the insulation paper is further located in the clamping area; the insulation paper comprises a processing part and two end parts, the processing part is arranged between the two end parts, each end part is positioned in each wire slot, and at least one through hole is formed in the processing part. According to the stator and the series excited motor provided by the embodiment of the utility model, the fitting degree of the insulation paper and the stator core can be effectively improved, so that a plurality of poor quality problems such as roll paper and winding damage, non-uniform assembly and the like can be avoided.

Description

Technical Field

[0001] The embodiments of the present utility model relate to the technical field of series-excited motors, and particularly to a stator and a series-excited motor. Background Art

[0002] A motor is a device or apparatus that converts electrical energy into mechanical energy. It generates a magnetic field through an electric current in a conductor and utilizes the interaction between the magnetic field and the conductor to achieve the conversion of electrical energy into mechanical energy. Motors are widely used in various fields. During the assembly process of the stator, it is usually necessary to first insert insulating paper into the wire grooves of the stator core and then perform automated or manual winding. However, in the prior art, the insulating paper is formed by a cold pressing process, and a part of the stress is released after forming, resulting in the inability of the formed insulating paper to fully fit the wire grooves of the stator core, and thus many quality problems such as paper curling, winding damage, and inconsistent assembly occur, seriously affecting the stability of the motor. Summary of the Utility Model

[0003] The embodiments of the present utility model provide a stator and a series-excited motor, which are beneficial to improving the fitting degree between the insulating paper and the stator, and thus can avoid many quality problems such as paper curling, winding damage, and inconsistent assembly.

[0004] According to some embodiments of the present utility model, on the one hand, a stator of a series-excited motor is provided, including: a stator core, the inner surface of the stator core includes at least two wire grooves and a clamping area located between the two wire grooves; insulating paper, both ends of the insulating paper are respectively placed in adjacent two wire grooves, and the insulating paper is also located in the clamping area; the insulating paper includes a processing part and two end parts, the processing part is arranged between the two end parts, each end part is located in each wire groove, and at least one through hole is arranged on the processing part.

[0005] In some embodiments, the processing part has a bending area except for the area in contact with the end part, and the included angle formed by the bending area is less than 180°; the through hole is located in the bending area.

[0006] In some embodiments, the clamping area has a limiting groove, and a part of the insulating paper in the bending area is clamped in the limiting groove.

[0007] In some embodiments, there is an adhesive layer between the wire groove and the insulating paper.

[0008] In some embodiments, the end part of the insulating paper includes a continuous first part and a second part, the first part is continuous with the processing part, and the second part bends in the direction towards the axis of the stator core from the first part.

[0009] In some embodiments, the insulating paper has a first side and a second side along the axial direction of the stator core, and at least one of the processing portions on the first side and the processing portion on the second side is provided with a card slot.

[0010] In some embodiments, the shape of the through hole includes a circle, an ellipse, a quadrilateral or a triangle.

[0011] In some embodiments, the stator core includes a yoke portion and a pole portion. The yoke portion is of an annular structure, the pole portion is located on the inner surface of the yoke portion, the inner surface of the yoke portion and the outer surface of the pole portion form the wire groove, and the insulating paper is located between the outer surface of the pole portion and the inner surface of the yoke portion.

[0012] In some embodiments, the at least one through hole is uniformly arranged along the axial direction of the stator core.

[0013] Correspondingly, another aspect of the embodiments of the present invention further provides a series-wound motor, including: a stator as described in any one of the above embodiments; a winding, the winding is located inside the stator, and the stator surrounds the winding, and the insulating paper is located between the winding and the stator core.

[0014] The technical solutions provided by the embodiments of the present invention have the following advantages:

[0015] The stator provided by the embodiments of the present invention includes two parts, a stator core and an insulating paper. The stator core is provided with a wire groove and a clamping area, and both ends of the insulating paper are respectively placed in adjacent wire grooves, and the processing portion of the insulating paper is located in the clamping area. That is to say, the insulating paper is located in two wire grooves, and the insulating paper is correspondingly provided with two regions corresponding to the magnetic poles of each other, thereby reducing the operation of inserting the insulating paper, thereby improving the efficiency. Secondly, through holes are provided on the insulating paper. The through holes can reduce the stress during the preparation of the insulating paper, that is, the stress caused by the temperature difference and the module during the preparation of the insulating paper; the through holes can also relieve the stress caused by fixing the insulating paper in the wire groove, so that the insulating paper fits better with the wire groove and the clamping area, thereby avoiding many quality problems such as paper curling, winding damage, and inconsistent assembly. Secondly, the insulation performance between the winding and the stator is also better, avoiding the influence of faults such as arc discharge or partial discharge on the motor equipment, and ensuring the normal operation and safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are illustrated by way of example in the accompanying drawings, which do not constitute a scale limitation unless otherwise stated.

[0017] Figure 1 FIG. is an exploded structural schematic diagram of a stator provided by an embodiment of the present invention;

[0018] Figure 2 A schematic structural diagram of the insulating paper in the stator provided by an embodiment of the present utility model;

[0019] Figure 3 A schematic structural diagram of a series-wound motor provided by an embodiment of the present utility model;

[0020] Figure 4 A schematic exploded structural diagram of a series-wound motor provided by an embodiment of the present utility model. Detailed implementation manners

[0021] As can be seen from the background art, in the current stator and series-wound motor, the adhesion between the insulating paper and the stator is poor, and thus many quality problems such as paper curling, winding, and assembly may occur.

[0022] Analysis reveals that one of the reasons for the poor adhesion between the insulating paper and the stator in the stator and series-wound motor is that: the current forming process of the insulating paper is cold pressing forming. After the traditional structure is formed, part of the stress is released, and the shape of the formed insulating paper may deviate from the standard shape defined by the module, resulting in the formed insulating paper being unable to fully adhere to the stator core.

[0023] The embodiment of the present utility model provides a stator and a series-wound motor. The stator includes two parts: a stator core and an insulating paper. The stator core is provided with wire grooves and a clamping area, and both ends of the insulating paper are respectively placed in two adjacent wire grooves. The processing part of the insulating paper is located in the clamping area. That is to say, the insulating paper is located in the two wire grooves, and two regions corresponding to the two magnetic poles are correspondingly arranged on the insulating paper, thereby reducing the operation of inserting the insulating paper and improving the efficiency. Secondly, through holes are provided on the insulating paper. The through holes can reduce the stress during the preparation of the insulating paper, that is, the stress caused by the temperature difference and the module during the preparation of the insulating paper; the through holes can also relieve the stress caused by fixing the insulating paper in the wire groove, so that the insulating paper fits better with the wire groove and the clamping area, thereby avoiding many quality problems such as paper curling, winding, and assembly. Secondly, it also makes the insulation performance between the winding and the stator better, avoiding the motor equipment being easily affected by faults such as arc discharge or partial discharge, and ensuring the normal operation and safety of the equipment.

[0024] In the description of the embodiments of the present utility model, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present utility model, "a plurality" means more than two, unless otherwise specifically defined.

[0025] References to "embodiments" in this document mean that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present utility model. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0026] In the description of the embodiments of the present utility model, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B, which can represent: the existence of A, the simultaneous existence of A and B, and the existence of B. In addition, the character " / " in this document generally represents an "or" relationship between the associated objects before and after.

[0027] In the description of the embodiments of the present utility model, the term "a plurality of" refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0028] In the description of the embodiments of the present utility model, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present utility model.

[0029] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0030] In the accompanying drawings corresponding to the embodiments of the present utility model, for better understanding and convenience of description, the thickness and area of the layers are enlarged. When describing a component (such as a layer, film, region, or substrate) on or on the surface of another component, the component can be "directly" on the surface of the other component, or there can be a third component between the two components. On the contrary, when describing a component on the surface of another component or when a surface of a component forms or is provided with another component, it means that there is no third component between the two components. In addition, when describing a component "substantially" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor on a partial edge of the entire surface.

[0031] In the description of the embodiments of the present utility model, when a certain component "includes" another component, unless otherwise specified, other components are not excluded, and other components may further be included. In addition, when components such as layers, films, regions, or plates are referred to as "on / at" another component, it can be "directly on" the other component (i.e., on the surface of the other component with no other components between them), or there can be another component between them. In addition, when components such as layers, films, regions, plates, etc. are "directly located on" another component, or when components such as layers, films, regions, plates, etc. are located on the surface of another component, it means that no other components are located between them.

[0032] The terms used in the description of the various embodiments herein are only for describing specific embodiments and are not intended to be limiting. As used in the description of the various embodiments and the appended claims, "the part" is also intended to include the plural form unless the context clearly indicates otherwise. Among them, the components include components such as layers, films, regions, or plates.

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will elaborate on the various embodiments of the present utility model in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that in the various embodiments of the present utility model, many technical details are presented for the better understanding of the readers of the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can still be implemented.

[0034] Figure 1 A schematic exploded view of a stator provided for an embodiment of the present utility model; Figure 2 A schematic structural view of an insulating paper in a stator provided for an embodiment of the present utility model. Among them, Figure 1 The dashed line on the stator core refers to the boundary line between the yoke portion and the pole portion, but Figure 1The dashed line of the middle stator core is only an example for those skilled in the art to understand the two features of the yoke portion and the pole portion, and does not constitute a limitation on the two. The two can be integrated or separated, and those skilled in the art can set the positions of the yoke portion and the pole portion according to actual needs.

[0035] Reference Figure 1 , according to some embodiments of the present invention, on the one hand, an embodiment of the present invention provides a stator of a series-wound motor, including: a stator core 110, the inner surface of the stator core 110 at least includes two wire grooves 111 and a clamping area 112 located between the two wire grooves 111; an insulating paper 120, both ends of the insulating paper 120 are respectively placed in two adjacent wire grooves 111, and the insulating paper 120 is also located in the clamping area 112; the insulating paper 120 includes a processing portion 123 and two end portions 122, each end portion 122 is located in each wire groove 111, and at least one through hole 121 is provided on the processing portion 123.

[0036] In some embodiments, the processing portion 123 has a bending area 124 in the area except the area in contact with the end portion 122, and the included angle formed by the bending area 124 is less than 180°; the through hole 121 is located in the bending area 124. In this way, the through hole 121 is located in the bending area 124. Due to the unevenness of the bending area 124, it is possible to avoid the shrinkage of the edge of the through hole 121 after bending, and it is possible to avoid the coil being inserted into the through hole 121, causing adverse effects. In addition, the bending process can also avoid occupying area horizontally, and thus facilitate entering the stator core 110.

[0037] In some embodiments, the bending of the bending area 124 can be an arc bending or a straight bending. In this application, Figure 1 the bending of the bending area 124 being an arc bending is taken as an example. The arc bending can avoid sharp corners and improve the fitting degree between the stator core 110 and the insulating paper 120.

[0038] In some embodiments, the distance between the bending area 124 and the two end portions 122 is equal, that is, the bending area 124 is located in the middle position of the processing portion 123, then the through hole 121 is provided in the middle position of the processing portion 123, and the distance from the two end portions 122 is equal. The through hole 121 can release stress on two areas of the insulating paper 120, and thus the insulating paper 120 can be attached to the inner surface of the wire groove 111.

[0039] In some embodiments, reference Figure 2, the through hole 121 is located at the middle position of the entire insulating paper 120, that is to say, the through hole 121 is located at the middle position of the engaging area 112 between the two wire grooves 111. In this way, the position of the through hole 121 is far from the wire grooves 111, and the through hole 121 is not located between the winding and the stator core 110. The remaining insulating paper 120 can ensure the insulation between the winding and the stator core 110, and thus can effectively avoid many quality problems such as paper curling, wire winding, and assembly caused by poor insulation.

[0040] In some embodiments, the engaging area 112 of the stator core 110 has a limiting groove 113, and a part of the insulating paper 120 in the bending area 124 is engaged in the limiting groove 113. In this way, the limiting groove 113 can engage the insulating paper 120 in the bending area 124 to prevent the insulating paper 120 from rotating clockwise or counterclockwise with the stator core 110, and thus can effectively avoid the problem of poor insulation caused between the stator core 110 and the winding.

[0041] In some embodiments, there is an adhesive layer between the wire groove 111 and the insulating paper 120. The adhesive layer is used to assist the mutual fixation between the insulating paper 120 and the stator core 110, prevent the insulating paper 120 and the stator core 110 from shifting, and also prevent the insulating paper 120 and the stator core 110 from sliding and separating when installing the motor winding.

[0042] In some embodiments, the end 122 of the insulating paper 120 includes a continuous first part 131 and a second part 132. The first part 131 is continuous with the processing part 123, and the second part 132 bends from the first part 131 in the direction N towards the axis A1 - A2 of the stator core 110. In this way, the second part 132 can extend beyond the area surrounded by the wire groove 111. The end 122 of the insulating paper 120 is not only located within the wire groove 111 but also extends outside the wire groove 111. The second part 132 extending outside the wire groove 111 can be effectively covered and pressed by another insulating paper 120 or an external insulating paper 120 to further limit the position of the insulating paper 120 and prevent the insulating paper 120 from moving.

[0043] Wherein, the angle b between the extending direction of the second part 132 of the insulating paper 120 and the radial direction N along the stator core 110 can be any value, and the embodiments of the present application do not limit it.

[0044] In some embodiments, the insulating paper 120 has a first side 141 and a second side 142 along the axial direction M of the stator core 110. At least one of the processing parts 123 on the first side 141 and the processing parts 123 on the second side 142 is provided with a clamping groove 125. The clamping groove 125 is beneficial for the subsequent installation of the mounting cover to be clamped.

[0045] In some embodiments, the shape of the through hole 121 includes an oval, a quadrilateral, a triangle, a near circle, a near quadrilateral, or a near triangle. In the embodiments of the present application, Figure 1 the through hole in [reference] is taken as an example of a circle. The embodiments of the present application do not limit the shape of the through hole, as long as it is a hole or groove structure that penetrates the thickness of the insulating paper.

[0046] In some embodiments, the stator core 110 includes a yoke portion 115 and a pole portion 114. The yoke portion 115 is an annular structure, and the pole portion 114 is located on the inner surface of the yoke portion 115. The inner surface of the yoke portion 115 and the outer surface of the pole portion 114 form a wire groove 111. The insulating paper 120 is located between the outer surface of the pole portion 114 and the inner surface of the yoke portion 115.

[0047] In some embodiments, at least one through hole 121 is uniformly arranged along the axial direction M of the stator core 110. That is to say, two through holes 121 are provided in the gaps between the copper wires of the motor winding. With such an arrangement, the through hole 121 does not affect the electrical insulation between the windings.

[0048] In some embodiments, the materials of the insulating paper 120, the stator core 110, and the structural design are the materials and structural design of the insulating paper 120 and the stator core 110 that are well known to those skilled in the art. The embodiments of the present application do not introduce them in detail.

[0049] The embodiment of the present utility model provides a stator, including two parts: a stator core 110 and an insulating paper 120. The stator core 110 is provided with a wire groove 111 and a clamping area 112. The two ends of the insulating paper 120 are respectively placed in two adjacent wire grooves 111, and the processing portion 123 of the insulating paper 120 is located in the clamping area 112. That is to say, the insulating paper 120 is located in two wire grooves 111, and the insulating paper 120 is correspondingly provided with two regions corresponding to the opposite magnetic poles, thereby reducing the operation of inserting the insulating paper 120 and improving the efficiency. Secondly, through holes 121 are provided on the insulating paper 120. The through holes 121 can reduce the stress during the preparation of the insulating paper 120, that is, the stress caused by the temperature difference and the module during the preparation of the insulating paper 120; the through holes 121 can also relieve the stress caused by fixing the insulating paper 120 in the wire groove 111, so that the insulating paper 120 fits better with the wire groove 111 and the clamping area 112, thereby avoiding many quality problems such as paper curling, winding, and assembly. Secondly, it also makes the insulation performance between the winding and the stator better, avoiding the influence of faults such as arc discharge or partial discharge on the motor equipment, and ensuring the normal operation and safety of the equipment.

[0050] Accordingly, on the other hand, an embodiment of the present utility model further provides a series-wound motor, including: a stator according to any one of the above embodiments, with the same or corresponding technical features as those in the above embodiments, which will not be elaborated herein in detail.

[0051] Figure 3 FIG. 4 is a schematic structural diagram of a series-wound motor provided by an embodiment of the present utility model, which is illustrated by taking the series-wound motor having two motor magnetic pole portions 114 as an example; Figure 4 FIG. 5 is an exploded structural diagram of a series-wound motor provided by an embodiment of the present utility model.

[0052] Refer to Figure 3 and Figure 4 , the series-wound motor includes: a stator according to any one of the above embodiments; a winding 2, the winding 2 is located inside the stator, and the winding 2 surrounds the stator core 110, and an insulating paper 120 is located between the winding 2 and the stator core 110.

[0053] In some embodiments, the series-wound motor further includes a top cover 3 and a bottom cover 4. The top cover 3 and the bottom cover 4 are provided with insulating plates, and the insulating plates cooperate with the card slots 125 at the ends of the insulating paper 120 to fix the insulating paper 120 and prevent the insulating paper 120 from moving along the axial direction M of the stator core 110.

[0054] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0055] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present utility model, and in practical applications, various changes can be made in form and details without departing from the spirit and scope of the present utility model. Any person skilled in the art can make their own changes and modifications within the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the scope defined by the claims.

Claims

1. A stator of a series-excited motor, characterized in that: include: A stator core, the inner surface of which includes at least two wire slots and a clamping area between the two wire slots; insulating paper, the two ends of which are respectively placed in two adjacent wire slots, and the insulating paper is also located in the clamping area; the insulating paper includes a processing part and two end parts, the processing part is arranged between the two end parts, each of the end parts is located in each of the wire slots, and at least one through hole is arranged on the processing part.

2. The stator of the series-excited motor according to claim 1, characterized in that: The processing portion has a bending area except for the area in contact with the end portion, and the angle formed by the bending area is less than 180°; the through hole is located in the bending area.

3. The stator of the series-excited motor according to claim 2, characterized in that: The clamping area has a limiting groove, and part of the insulating paper in the bending area is clamped in the limiting groove.

4. The stator of the series-excited motor according to claim 1, characterized in that: An adhesive layer is provided between the wire trough and the insulating paper.

5. The stator of the series-excited motor according to claim 1, characterized in that: The end portion of the insulating paper includes a continuous first portion and a second portion, the first portion is continuous with the processing portion, and the second portion is bent from the first portion toward the axis of the stator core.

6. The stator of the series-excited motor according to claim 1, characterized in that: The insulating paper has a first side and a second side along the axial direction of the stator core, and at least one of the processing portion on the first side and the processing portion on the second side is provided with a card slot.

7. The stator of the series-excited motor according to claim 1, characterized in that: The shape of the through hole includes circle, ellipse, quadrilateral or triangle.

8. The stator of the series-excited motor according to claim 1, characterized in that: The stator core includes a yoke portion and a magnetic pole portion, the yoke portion is an annular structure, the magnetic pole portion is located on the inner surface of the yoke portion, the inner surface of the yoke portion and the outer surface of the magnetic pole portion constitute the wire slot, and the insulating paper is located between the outer surface of the magnetic pole portion and the inner surface of the yoke portion.

9. The stator of the series-excited motor according to claim 1, characterized in that: The at least one through hole is evenly arranged along the axial direction of the stator core.

10. A series-excited motor, characterized in that: The series-excited motor comprises: a stator according to any one of claims 1 to 9; a winding, wherein the winding is located inside the stator and the stator surrounds the winding, and the insulating paper is located between the winding and the stator core.

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