A slot insulation paper, insulation structure and concentrated winding motor

Abstract

The present invention discloses a slot insulation paper, an insulation structure and a concentrated winding motor. The present invention designs the slot insulation paper so that the slot insulation paper includes not only a slot-shaped main body, but also an upper bending part and / or a lower bending part located at both ends along the extension direction of the slot-shaped main body. The slot insulation paper is effectively fixed by the upper bending part and / or the lower bending part of the slot insulation paper, so that in the process of winding the concentrated winding motor, the formation of a large coil or a loose coil due to the movement of the slot insulation paper is avoided. And by adjusting the height of the teeth of the skeleton structure, when the design size of the skeleton structure changes, the two ends of the slot-shaped main body can be made equal in height to the side of the skeleton structure away from the iron core without making corresponding changes to the slot insulation paper, thereby increasing the application range of the slot insulation paper, reducing the styles of the slot insulation paper, and reducing the time and cost of making the slot insulation paper.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of concentrated winding motors, and in particular to slot insulation paper, an insulation structure and a concentrated winding motor. Background Art

[0002] The concentrated winding motor is a new type of motor that has been developed recently and combines multidisciplinary technologies. Compared with traditional induction motors, it has the advantages of simple structure, reliable operation, small size, light weight, low loss, high efficiency (efficiency greater than 80%), high dynamic response, high heat capacity, etc. It also has the characteristics of low noise, long life, no commutation spark, etc., so it has been widely used in various fields, such as household appliances, medical instruments, analytical instruments and laser equipment.

[0003] In order to ensure the electrical insulation between the core and the coil of the concentrated winding motor, insulating paper (hereinafter referred to as slot insulating paper) can be configured on the surface of each slot of the core. The slot insulating paper currently used in the concentrated winding motor is an arc-shaped one that matches the slot type, and is inserted directly into the slot to the bottom, and the slot insulating paper is higher than the core along the radial side of the core. Since the slot insulation is only inserted directly into the slot, there is no fixed card slot in the axial direction of the core, and the core cannot be fixed in the axial direction. During the winding process of the concentrated winding motor, the slot insulating paper moves up and down in the slot with the outlet nozzle, and is easily carried up. Among them, one side of the slot insulating paper along the radial direction of the core will affect the winding because the slot insulating paper protrudes too much from the core, and the other side will affect the insulation distance because the slot insulating paper is not long enough, and production cannot be completed smoothly. In addition, the length of the slot insulating paper is highly related to the tooth portion of the insulation skeleton. If the design size of the insulation skeleton changes, or corresponds to the insulation skeleton design requirements of different customers, the slot insulating paper will be changed accordingly, so the slot insulating paper styles increase, and the working hours and costs increase. Summary of the invention

[0004] The present invention provides slot insulation paper, an insulation structure and a centralized winding motor, so as to effectively fix the slot insulation paper during the winding process of the centralized winding motor, thereby avoiding the formation of a large coil or a loose coil during the winding process due to the movement of the slot insulation paper.

[0005] In a first aspect, an embodiment of the present invention provides a slot insulation paper for being arranged in a core slot of a concentrated winding motor, wherein the slot insulation paper comprises a slot-shaped main body portion, and an upper bending portion and / or a lower bending portion located at both ends along an extension direction of the slot-shaped main body portion; the upper bending portion and / or the lower bending portion protrudes beyond the main extension direction of the slot-shaped main body portion.

[0006] Specifically, the upper bending portion and / or the lower bending portion both include a first folded edge and a second folded edge, the first folded edge is fixedly connected to the groove-shaped main body, and the angle formed between the first folded edge and the groove-shaped main body is an acute angle, and the second folded edge is fixedly connected to the first folded edge.

[0007] Specifically, the upper bending portion and / or the lower bending portion each include a first folded edge, a second folded edge and a third folded edge, the first folded edge being fixedly connected to the groove-shaped main body portion, and the angle formed between the first folded edge and the groove-shaped main body portion is a right angle, one end of the third folded edge is fixedly connected to the first folded edge, and the other end of the third folded edge is fixedly connected to the second folded edge.

[0008] Specifically, the upper bending portion, the lower bending portion and the slot-shaped main body of the slot insulation paper have the same thickness.

[0009] Specifically, when the slot insulating paper includes an upper bending portion and a lower bending portion at the same time, the upper bending portion and the lower bending portion are arranged on the same side of the slot insulating paper.

[0010] In a second aspect, an embodiment of the present invention further provides an insulation structure, including a skeleton structure and slot insulation paper, wherein the slot insulation paper is the slot insulation paper provided by any embodiment of the present invention.

[0011] Specifically, both ends of the slot-shaped main body of the slot insulation paper are flush with the height of the teeth of the skeleton structure.

[0012] In the third aspect, an embodiment of the present invention further provides a centralized winding motor, comprising an iron core, wherein the iron core has a plurality of wire clamping grooves, and the plurality of wire clamping grooves are provided with an insulating structure provided by any embodiment of the present invention; and a plurality of notches penetrating the wire clamping grooves are formed between the two ends of the iron core and the skeleton structure of the insulating structure, and the upper bending portion and / or lower bending portion of the slot insulating paper of the insulating structure are arranged in the notches.

[0013] Specifically, the distance of the notch along the axial direction of the core is greater than or equal to 1 mm.

[0014] Specifically, the intersection of the first folded edge and the second folded edge of the upper bending portion and the lower bending portion abuts against the iron core, and the end of the second folded edge abuts against the connecting edge of the iron core and the skeleton structure.

[0015] Specifically, the core is formed by rolling laminations, and the length of the laminations at one end and / or the other end of the core is shorter than the length of other laminations of the core.

[0016] Specifically, the thickness of the laminations at one end and / or the other end of the core is greater than the thickness of the other laminations of the core.

[0017] The present invention designs the slot insulation paper so that the slot insulation paper includes not only a slot-shaped main body but also an upper bending part and / or a lower bending part located at both ends along the extension direction of the slot-shaped main body, so that the upper bending part and / or the lower bending part of the slot insulation paper are inserted into the notch of the centralized winding motor, so as to effectively fix the slot insulation paper during the winding process of the centralized winding motor, thereby avoiding the formation of a large coil or a loose coil during the winding process due to the movement of the slot insulation paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a slot insulation paper provided by an embodiment of the present invention;

[0019] Figure 2 is a schematic structural diagram of another slot insulation paper provided by an embodiment of the present invention;

[0020] Figure 3 is a schematic structural diagram of another slot insulation paper provided by an embodiment of the present invention;

[0021] Figure 4 It is a schematic diagram of a three-dimensional structure of slot insulation paper provided by an embodiment of the present invention;

[0022] Figure 5 A schematic structural diagram of a slot insulation structure provided by an embodiment of the present invention;

[0023] Figure 6 It is a structural schematic diagram of a concentrated winding motor provided by an embodiment of the present invention;

[0024] Figure 7 is a structural schematic diagram of another concentrated winding motor provided by an embodiment of the present invention;

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of a concentrated winding motor provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0027] Figure 1 A schematic diagram of the structure of a slot insulation paper provided by an embodiment of the present invention, Figure 2 A schematic diagram of the structure of another slot insulation paper provided by an embodiment of the present invention, Figure 3 A schematic diagram of the structure of another slot insulation paper provided by an embodiment of the present invention, Figure 43D schematic diagram of a slot insulation paper provided by an embodiment of the present invention. This embodiment can be used to be arranged in a wire slot of a centralized winding motor, and is suitable for situations where the slot insulation paper moves when the centralized winding motor is winding, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the slot insulating paper includes a slot-shaped main body 110, and upper bending portions 120 and / or lower bending portions 130 located at both ends along the extension direction of the slot-shaped main body 110; the upper bending portions 120 and / or lower bending portions 130 protrude from the main extension direction of the slot-shaped main body 110.

[0028] like Figure 1 As shown, the slot insulating paper includes a slot-shaped main body 110 and an upper bending portion 120. The upper bending portion 120 protrudes from the main extension direction of the slot-shaped main body 110, and the protruding direction of the upper bending portion 120 forms an angle with the main extension direction of the slot-shaped main body 110. The protruding direction of the upper bending portion 120 is the side direction in which the slot insulating paper contacts the iron core when the slot insulating paper is used for concentrated winding of the motor, and the angle formed by the upper bending portion 120 and the slot-shaped main body 110 is less than or equal to 90°.

[0029] It should be noted that the shape of the upper bending portion 120 is not limited, for example, Figure 1 The illustrated embodiment shows different folded edge compositions, and may also be composed of curved edges, the two end points of which are respectively fixedly connected to two points on the groove-shaped main body 110 .

[0030] Based on the above embodiments, the upper bending portion 120 and / or the lower bending portion 130 both include a first folded edge and a second folded edge, the first folded edge is fixedly connected to the groove-shaped main body 110, and the angle formed between the first folded edge and the groove-shaped main body 110 is an acute angle, and the second folded edge is fixedly connected to the first folded edge.

[0031] Continue to refer Figure 1 ,like Figure 1As shown, the slot insulation paper includes a slot-shaped main body 110 and an upper bending portion 120. The slot insulation paper is used in the wire-cage slot of the centralized winding motor, so the shape of the slot-shaped main body 110 is the same as the shape of the wire-cage slot, so that the slot-shaped main body 110 of the slot insulation paper fits the wire-cage slot, and the vertical distance from the slot-shaped main body 110 to the surface of the wire-cage slot is equal. The first folded edge 121 of the upper bending portion 120 is fixedly connected to one end A of the slot-shaped main body 110, and the angle θ formed by the first folded edge 121 and the slot-shaped main body 110 is an acute angle, so that the first folded edge 121 of the upper bending portion 120 is bent toward the other end B of the slot-shaped main body 110. The second folded edge 122 is fixedly connected to the first folded edge 121, and forms an angle β with the first side 121, and the value range of β is greater than 0° and less than 180°, so that the second folded edge 122 is bent in the direction away from the slot-shaped main body 110. The angle θ formed by the first folded edge 121 and the groove-shaped main body 110 is any acute angle.

[0032] It should be noted that when the slot insulating paper only includes the slot-shaped main body 110 and the lower bending portion 130, the structure is similar to that of the slot insulating paper only including the slot-shaped main body 110 and the upper bending portion 120, and the effect is the same, which will not be repeated here.

[0033] like Figure 2 As shown, the upper bending portion 120 includes a first folding edge, a second folding edge and a third folding edge, the first folding edge 121 of the upper bending portion 120 is fixedly connected to one end A of the groove-shaped main body 110, the angle θ formed by the first folding edge 121 and the groove-shaped main body 110 is a right angle, one end of the third folding edge 123 is fixedly connected to the first folding edge 121, and the other end of the third folding edge 123 is fixedly connected to the second folding edge 122. The angle formed by the third folding edge 123 and the first folding edge 121 and the angle formed by the third folding edge 123 and the second folding edge 122 are also right angles.

[0034] like Figure 3As shown, the slot insulating paper includes a slot-shaped main body 110, an upper bending portion 120 and a lower bending portion 130. The structure of the lower bending portion 130 is similar to that of the upper bending portion 120. The first folding edge 131 of the lower bending portion 130 is bent toward the direction of one end A of the slot-shaped main body 110, and the second folding edge 132 is also bent away from the slot-shaped main body 110. The angle θ formed by the first folding edge 121 of the upper bending portion 120 and the slot-shaped main body 110 may be different from the angle δ formed by the first folding edge 131 of the lower bending portion 130 and the slot-shaped main body 110. Similarly, the angle β formed by the second folding edge 122 of the upper bending portion 120 and the first folding edge 121 may be different from the angle α formed by the second folding edge 132 of the lower bending portion 130 and the first folding edge 131. Generally, when the angle θ is different from the angle δ, the angle β is also different from the angle α. Exemplarily, the angle θ is equal to the angle δ, and the angle β is also equal to the angle α. At this time, the upper bend portion 120 and the lower bend portion 130 are symmetrical with the axis passing through the midpoint of the extension direction of the slot-shaped main body 110 and perpendicular to the extension direction of the slot-shaped main body 110 as the symmetry axis. When the slot insulating paper includes a lower bend portion 130, the lower bend portion 130 may also include a first fold 131, a second fold 132, and a third fold. The angle θ formed by the first fold 131 of the lower bend portion 130 and the slot-shaped main body 110 is a right angle, and one end of the third fold is fixedly connected to the first fold 131, and the other end is fixedly connected to the second fold 132.

[0035] When the slot insulation paper is provided with an upper bending portion 120 and / or a lower bending portion 130, the upper bending portion 120 and / or the lower bending portion 130 can be used to fix the relative position between the slot insulation paper and the iron core, so that during the winding process of the centralized winding motor, the slot insulation paper will not move due to the movement of the emergence nozzle of the centralized winding motor in the wire clamping slot, thereby avoiding the situation where one end (for example, end A) of the slot insulation paper protrudes from the iron core and affects the winding operation after the slot insulation paper moves in the wire clamping slot, and the other end (for example, end B) is smaller than the length of the iron core, so that the insulation distance between the iron core and the coil is insufficient and the operation cannot be carried out smoothly.

[0036] like Figure 3 and Figure 4 As shown, the upper bending portion 120 and the lower bending portion 130 of the slot insulation paper are arranged on the same side of the slot insulation paper.

[0037] The slot insulation paper is arranged in the wire slot to insulate the coil and the iron core, so one side of the slot insulation paper contacts the iron core, and the other side of the slot insulation paper contacts the coil. In order to reduce the loss of the coil, the upper bending portion 120 and the lower bending portion 130 of the slot insulation paper are both arranged on the side where the slot insulation paper contacts the iron core.

[0038] The technical solution of this embodiment is to design the slot insulation paper so that the slot insulation paper includes not only a slot-shaped main body but also an upper bending portion and / or a lower bending portion located at both ends along the extension direction of the slot-shaped main body. The slot insulation paper is effectively fixed by the upper bending portion and / or the lower bending portion of the slot insulation paper, so that the formation of a large coil or a loose coil due to the movement of the slot insulation paper is avoided during the winding process of the centralized winding motor.

[0039] Based on the above technical solutions, continue to refer to Figure 1 and Figure 2 The upper bending portion 120, the lower bending portion 130 and the slot-shaped main body 110 of the slot insulating paper have the same thickness h.

[0040] like Figure 1 and Figure 3 As shown, the upper bending portion 120, the lower bending portion 130 and the slot-shaped main body 110 of the slot insulating paper have the same thickness h, so that the distance between the iron core and the coil on the two sides of the slot insulating paper is equal, thereby ensuring the insulation distance between the iron core and the coil and ensuring the smooth operation of the concentrated winding motor.

[0041] Figure 5 This is a structural schematic diagram of a slot insulation structure provided by an embodiment of the present invention. The embodiment of the present invention further provides an insulation structure, including a skeleton structure and the slot insulation paper provided by any embodiment of the present invention.

[0042] On the basis of the above-mentioned embodiment, both ends of the slot-shaped main body 110 of the slot insulation paper are flush with the height of the teeth of the skeleton structure.

[0043] like Figure 5 As shown, the skeleton structure includes an upper skeleton structure 150 and a lower skeleton structure 151, and the two ends of the slot-shaped main body 110 of the slot insulation paper are flush with the tooth height l of the skeleton structure, so that the centralized winding motor can ensure that the slot insulation structure provides sufficient insulation distance during the winding process, and can also avoid the slot insulation paper being too long during the winding process to increase the friction between the coil and the insulation structure, thereby reducing losses.

[0044] Figure 6 A schematic diagram of the structure of a concentrated winding motor provided by an embodiment of the present invention. Figure 7 is a schematic diagram of the structure of another concentrated winding motor provided by an embodiment of the present invention. Figure 8 is a schematic diagram of a three-dimensional structure of a concentrated winding motor provided by an embodiment of the present invention, such as Figure 6 , Figure 7 and Figure 8As shown, the concentrated winding motor includes an iron core 140, and a plurality of wire clamping grooves (not shown in the figure) are provided on the iron core 140, and the insulation structure provided by any embodiment of the present invention is arranged in the plurality of wire clamping grooves; and a plurality of slots 160 penetrating the wire clamping grooves are formed between the two ends of the iron core 140 and the skeleton structure of the insulation structure, and the upper bending portion 120 and / or the lower bending portion 130 of the slot insulation paper of the insulation structure are arranged in the slots 160.

[0045] like Figure 6 As shown, when the slot insulating paper includes a slot-shaped main body 110 and an upper bending portion 120, the iron core 140 can form a notch 160 with the skeleton structure 150, and a notch 160 can be formed between the iron core 140 and the skeleton structure 151, or a notch 160 may not be formed. Notch 160 When the iron core 140 and the skeleton structure 150 form a notch 160, the upper bending portion 120 of the slot insulating paper is inserted into the notch 160 formed by the iron core 140 and the skeleton structure 150, and the slot insulating paper is fixed by the upper bending portion 120. The concentrated winding motor also includes a winding wire, which is wound along the wire clamping slot and the skeleton structure to form a coil. When the slot insulating paper is fixed, the concentrated winding motor avoids the occurrence of phenomena such as the slot insulating paper forming a large coil or the coil being loose due to the movement of the slot insulating paper during the winding process. When the upper bend portion 120 of the slot insulating paper is inserted into the slot 160 formed by the iron core 140 and the skeleton structure 150, one end (end A) of the slot-shaped main body 110 of the slot insulating paper is at the same height as the surface of the skeleton structure 150 away from the iron core 140 and perpendicular to the axial direction of the iron core 140, and the other end (end B) of the slot-shaped main body 110 of the slot insulating paper is at the same height as the surface of the skeleton structure 151 away from the iron core 140 and perpendicular to the axial direction of the iron core 140, which not only ensures the insulation distance between the iron core 140 and the coil, but also does not affect the operation when the motor winding is concentrated.

[0046] like Figure 7 As shown, when the slot insulating paper includes a slot-shaped main body 110, an upper bending portion 120 and a lower bending portion 130, a slot 160 is formed between the iron core 140 and the skeleton structure 150, and a slot 160 is also formed between the iron core 140 and the skeleton structure 151. At this time, the upper bending portion 120 of the slot insulating paper is inserted into the slot 160 formed by the iron core 140 and the skeleton structure 150, and the lower bending portion 130 of the slot insulating paper is inserted into the slot 160 formed by the iron core 140 and the skeleton structure 151. Therefore, the slot insulating paper can be fixed by the upper bending portion 120 and the lower bending portion 130 at the same time, so that the slot insulating paper can be prevented from forming a large coil or the coil is loose due to the movement of the slot insulating paper during the winding process of the concentrated winding motor. The length of the slot-shaped main body 110 of the slot insulating paper is Figure 6 The length of the slot-shaped main body 110 is consistent, and is at the same height as the surface of the skeleton structure at both ends of the core 140 away from the core 140 and perpendicular to the axial direction of the core 140.

[0047] It should be noted that Figure 6 and Figure 7 The figure only shows the positional relationship between the wire clamping slots and the slot insulation paper on the core 140 of the concentrated winding motor by way of example, rather than limiting the number of wire clamping slots. Figure 8 As shown, in the concentrated winding motor, there are multiple wire clamping grooves, so there are multiple slots 160 formed by the iron core 140 and the skeleton structure 150. When the iron core 140 and the skeleton structure 151 form a slot 160, there are also multiple slots 160 formed by the iron core 140 and the skeleton structure 151, and the number of slots 160 formed by the iron core 140 and the skeleton structure 150 may not be equal to the number of slots 160 formed by the iron core 140 and the skeleton structure 151.

[0048] The technical solution of this embodiment is to design the slot insulation paper so that the slot insulation paper includes not only a slot-shaped main body but also an upper bending portion and / or a lower bending portion located at both ends along the extension direction of the slot-shaped main body. The relative position between the slot insulation paper and the iron core is fixed by the upper bending portion and / or the lower bending portion of the slot insulation paper to effectively fix the slot insulation paper, so that the occurrence of large coils or loose coils due to the movement of the slot insulation paper during the winding process of the centralized winding motor is avoided.

[0049] Based on the above embodiments, continue to refer to Figure 6 and Figure 7 The intersection of the first folded edge and the second folded edge of the upper bending portion 120 and / or the lower bending portion 130 contacts the iron core 140, and the end of the second folded edge contacts the connecting edge of the iron core and the skeleton structure.

[0050] In order to make the upper bend portion 120 of the slot insulation paper fit into the notch 160 formed by the iron core 140 and the skeleton structure 150 and / or make the lower bend portion 130 of the slot insulation paper fit into the notch 160 formed by the iron core 140 and the skeleton structure 151, when the angle formed by the upper bend portion 120 and / or the lower bend portion 130 of the slot insulation paper and the slot-shaped main body 110 is an acute angle, the intersection of the first folded edge of the upper bend portion 120 and / or the lower bend portion 130 and the second folded edge conflicts with the iron core 140, and the end of the second folded edge conflicts with the connecting edge of the iron core and the skeleton structure, thereby preventing the concentrated winding motor from driving the slot insulation paper to move during the winding process. In order to fix the slot insulating paper, the vertical length of the second folded edge of the upper bend 120 and / or the lower bend 130 of the slot insulating paper in the axial direction of the iron core 140 is equal to the vertical distance of the slot 160 in the axial direction of the iron core 140, so that the two end points of the second folded edge of the upper bend 120 and / or the lower bend 130 are respectively in contact with the iron core 140 and the skeleton structure, thereby completely fixing the slot insulating paper to prevent movement.

[0051] When the angle formed by the upper bending portion 120 and / or the lower bending portion 130 of the slot insulating paper and the slot-shaped main body 110 is a right angle, the two ends of the third folded edge respectively contact the connecting edges of the iron core 140 and the skeleton structure, so that the length of the third folded edge is equal to the vertical distance of the slot opening 160 in the axial direction of the iron core 140, thereby completely fixing the slot insulating paper and avoiding the concentrated winding motor from driving the slot insulating paper to move during the winding process.

[0052] The angle θ formed by the first folded edge 121 of the upper bend 120 of the slot insulation paper and the slot-shaped main body 110 is any acute angle or right angle, and / or the angle δ formed by the first folded edge 131 of the lower bend 130 and the slot-shaped main body 110 is any acute angle or right angle, and it is only necessary to ensure that the two end points of the second folded edge 122 of the upper bend 120 and / or the second folded edge 132 of the lower bend 130 are respectively in conflict with the iron core 140 and the skeleton structure. The angle β formed by the second folded edge 122 and the first folded edge 121 of the upper bend 120 and / or the angle α formed by the second folded edge 132 and the first folded edge 131 of the lower bend 130 are related to the height of the teeth of the skeleton structure in addition to ensuring that the two end points of the second folded edge are respectively in conflict with the iron core 140 and the skeleton structure. Without changing the angle θ and / or the angle δ, the thicker the skeleton structure, the smaller the angle β and / or the angle α.

[0053] It should be noted that the upper bending portion 120 and / or the lower bending portion 130 in each embodiment of the present invention includes three schemes, namely, only the upper bending portion 120, only the lower bending portion 130, and both the upper bending portion 120 and the lower bending portion 130.

[0054] Continue to refer Figure 6 and Figure 7 , the length of the laminations at one end and / or the other end of the core 140 is smaller than the length of the other laminations of the core 140 .

[0055] like Figure 6 and Figure 7As shown, the skeleton structure is at both ends of the core 140, and the outer contour of the skeleton structure and the projection of the side of the core 140 adjacent to the slot insulation paper in the axial direction of the core 140 are the same straight line. The core 140 is generally rolled from laminations to reduce the eddy current of the core 140, thereby reducing the eddy current loss of the core 140. For example, the core 140 can be rolled from silicon steel sheets. When the core 140 forms a slot 160 with the skeleton structure 150 and / or the skeleton structure 151, at one end of the slot 160, the length of the laminations at one end and / or the other end of the core 140 is less than the length of other laminations of the core 140, so that the laminations at one end and / or the other end of the core 140 are parallel to the axial direction of the core 140, the side of the other laminations of the core 140 that is perpendicular to the axial direction of the core 140, and the side of the skeleton structure close to the core 140 form a slot 160, so that the upper bending portion and / or the lower bending portion of the slot insulation paper is stuck in the slot to fix the slot insulation paper.

[0056] The technical solution of this embodiment forms a notch between the iron core and the skeleton structure by making the length of the laminations at one end and / or the other end of the iron core smaller than the length of other laminations of the iron core, so that the upper bent portion and / or the lower bent portion of the slot insulating paper fits into the notch to fix the slot insulating paper, thereby avoiding the formation of large coils or loose coils due to the movement of the slot insulating paper during the winding process of the centralized winding motor.

[0057] Based on the above technical solutions, continue to refer to Figure 6 and Figure 7 The thickness of the laminations at one end and / or the other end of the core 140 is greater than the thickness of the other laminations of the core 140 .

[0058] In order to reduce the eddy current loss of the core 140, the core 140 is rolled from laminations, and the thickness of the laminations is commonly used to be 0.20 to 0.3 mm. The slot insulation paper is used to insulate the core 140 from the coil, and to achieve the purpose of insulation, not only slot insulation paper is needed, but also insulation distance must be ensured. In order to ensure the insulation distance, in general, the distance of the slot 160 along the axial direction of the core 140 is greater than or equal to 1 mm. Figure 6 and Figure 7 As shown, the axial distance of the slot 160 along the core 140 is equal to the sum of the thickness of the laminations at one end and / or the other end of the core 140 and the distance between the core 140 and the skeleton structure. Therefore, in general, in order to ensure the insulation distance, the thickness of the short lamination forming the slot 160 is set to be greater than the thickness of other laminations of the core 140, and can be set to be greater than or equal to 1 mm, thereby ensuring that the distance of the slot 160 along the axis of the core 140 is greater than or equal to 1 mm.

[0059] The technical solution of this embodiment is to set the thickness of the laminations at one end and / or the other end of the core to be greater than the thickness of other laminations of the core, so that the distance of the formed slots in the axial direction of the core is greater than or equal to 1 mm, thereby ensuring the insulation distance between the slot insulation paper insulated core and the coil, and ensuring the normal operation of the concentrated winding motor.

[0060] The length of the slot-shaped main body 110 of the slot insulating paper is related to the height of the tooth portion of the skeleton structure, and its two ends (end A and section B) are at the same height as the side of the tooth portion of the skeleton structure away from the iron core 140. On the basis that the axial distance of the slot 160 along the iron core 140 is greater than or equal to 1 mm (that is, the thickness of the laminations at one end and / or the other end of the iron core 140 is greater than or equal to 1 mm), the insulating structure can adapt to more design dimensions of the skeleton structure. For example, when the length of the insulating structure is relatively short, the tooth height of the skeleton structure can be designed to be low, making the skeleton structure thinner, ensuring that the two ends of the slot-shaped main body 110 (end A and section B) are at the same height as the side of the skeleton structure away from the core 140, and at the same time ensuring that the axial distance of the slot 160 along the core 140 is greater than or equal to 1 mm. On the one hand, the material used for the skeleton structure can be saved. On the other hand, since the total stroke of the concentrated winding motor when winding is the height of the core 140 and the height of the teeth of the skeleton structure, when the core 140 remains unchanged, the stroke when winding can be shorter due to the reduction in the tooth height of the skeleton structure, thereby saving the use of coils and effectively reducing the loss of the concentrated winding motor.

[0061] The technical solution of this embodiment adjusts the tooth height of the skeleton structure so that when the design size of the skeleton structure changes, the two ends of the slot body (end A and segment B) can be made equal in height to the side of the skeleton structure away from the core without making corresponding changes to the slot insulation paper, thereby increasing the application range of the slot insulation paper, reducing the styles of the slot insulation paper, and reducing the man-hours and costs of making the slot insulation paper. At the same time, the winding stroke of the centralized winding motor can be reduced, the use of the coil can be saved, and the loss of the centralized winding motor can be effectively reduced.

[0062] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A slot insulation paper, used to be arranged in the wire slot of a centralized winding motor, characterized in that: The slot insulating paper comprises a slot-shaped main body, and an upper bending portion and / or a lower bending portion located at both ends along the extending direction of the slot-shaped main body; The upper bending portion and / or the lower bending portion protrudes from the main extension direction of the slot-shaped main body; the upper bending portion and / or the lower bending portion are used to fix the relative position between the slot insulation paper and the iron core, so as to avoid the formation of a large coil or a loose coil due to the movement of the slot insulation paper during the winding process of the concentrated winding motor; The upper bending portion and / or the lower bending portion both include a first folded edge and a second folded edge, the first folded edge is fixedly connected to the groove-shaped main body, the angle formed between the first folded edge and the groove-shaped main body is an acute angle, and the second folded edge is fixedly connected to the first folded edge; or: The upper bending portion and / or the lower bending portion both include a first folded edge, a second folded edge and a third folded edge. The first folded edge is fixedly connected to the groove-shaped main body portion, and the angle formed between the first folded edge and the groove-shaped main body portion is a right angle. One end of the third folded edge is fixedly connected to the first folded edge, and the other end of the third folded edge is fixedly connected to the second folded edge.

2. The slot insulation paper according to claim 1, characterized in that: The upper bending portion, the lower bending portion and the slot-shaped main body of the slot insulating paper have the same thickness.

3. The slot insulation paper according to claim 1, characterized in that: When the slot insulating paper includes both an upper bending portion and a lower bending portion, the upper bending portion and the lower bending portion are arranged on the same side of the slot insulating paper.

4. An insulation structure, comprising a skeleton structure and slot insulation paper, characterized in that: The slot insulation paper is the slot insulation paper according to any one of claims 1 to 3.

5. The insulation structure according to claim 4, characterized in that: Both ends of the slot-shaped main body of the slot insulation paper are flush with the height of the teeth of the skeleton structure.

6. A concentrated winding motor, comprising an iron core, wherein the iron core has a plurality of wire clamping grooves, characterized in that: The multiple wire-holding grooves are provided with an insulating structure as described in any one of claims 4-5; and a plurality of slots penetrating the wire-holding grooves are formed between the two ends of the iron core and the skeleton structure of the insulating structure, and the upper bending portion and / or the lower bending portion of the slot insulating paper of the insulating structure are arranged in the slots.

7. The concentrated winding motor according to claim 6, characterized in that: The distance of the notch along the axial direction of the core is greater than or equal to 1 mm.

8. The concentrated winding motor according to claim 6, characterized in that: The intersection of the first folded edge and the second folded edge of the upper bending portion and / or the lower bending portion abuts against the iron core, and the end of the second folded edge abuts against the connecting edge of the iron core and the skeleton structure.

9. The concentrated winding motor according to claim 6, characterized in that: The core is formed by rolling laminations, and the length of the laminations at one end and / or the other end of the core is shorter than the length of other laminations of the core.

10. The concentrated winding motor according to claim 9, characterized in that: The thickness of the laminations at one end and / or the other end of the core is greater than the thickness of the other laminations of the core.

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