Insulation framework, stator, motor and electric appliance

Abstract

The utility model provides an insulating framework, a stator, a motor and an electric appliance. The insulating framework comprises a framework body, a winding part and a baffle plate part, the framework body is annular, and the winding parts and the baffle parts are arranged in a one-to-one correspondence mode. A winding groove is defined by every two adjacent winding parts, the corresponding baffle parts and the framework body, and a groove opening of the winding groove is defined by every two adjacent baffle parts. First groove insulation paper limiting parts are arranged at the two ends, close to the groove openings, of the baffle plate part; a second groove insulation paper limiting part is arranged on the peripheral wall of the framework body, and the first groove insulation paper limiting part and the second groove insulation paper limiting part are both located in the winding groove; a second groove insulation paper limiting part is arranged in each winding groove; the first groove insulation paper limiting part is provided with a first limiting groove, the second groove insulation paper limiting part is provided with a second limiting groove, and an insertion opening of the first limiting groove and an insertion opening of the second limiting groove both face the first end of the framework body. The insulation framework can solve the problems of insufficient limit and looseness of slot insulation paper of the existing concentrated coil frequency conversion stator.

Description

Technical Field

[0001] This utility model relates to the field of motors, specifically to an insulating frame, a stator, a motor, and electrical components. Background Technology

[0002] The stator is an important component of an electric motor, and the insulating frame is a crucial component of the stator in a centralized winding variable frequency motor. The form of the insulating frame varies slightly depending on the stator model. For centralized winding variable frequency motors, the ends and slot insulation paper portions of the insulating frame are injection molded.

[0003] The way the insulating frame fixes and limits the slot insulating paper is by setting the pin structure near the slot opening. This structure has poor fixation and fit of the slot insulating paper, which may cause defects such as slot roll-up. It is easy for the slot insulating paper to shift, which may lead to poor insulation withstand voltage between the stator core and the winding, affecting the reliability of the motor. Utility Model Content

[0004] The primary objective of this invention is to provide an insulating frame that solves the problems of insufficient limiting and looseness of slot insulating paper in existing centralized winding frequency converter stators.

[0005] The second objective of this invention is to provide a stator having the aforementioned insulating skeleton.

[0006] The third objective of this invention is to provide an electric motor having the aforementioned stator.

[0007] The fourth objective of this invention is to provide an electrical appliance having the aforementioned motor.

[0008] To achieve the aforementioned first objective, this utility model provides an insulating frame, comprising a frame body, a winding portion, and a baffle portion; the frame body is annular, and there are multiple winding portions and multiple baffle portions, with each winding portion and baffle portion corresponding to the other; each winding portion is arranged circumferentially along the frame body and extends radially from the peripheral wall of the frame body; each baffle portion is respectively disposed at the end of the corresponding winding portion away from the frame body; two adjacent winding portions and the corresponding baffle portion together with the frame body form a winding groove, and two adjacent baffle portions form a winding groove. The plate portion forms the opening of the winding groove; both ends of the baffle portion are provided with a first groove insulating paper limiting portion near the groove opening; a second groove insulating paper limiting portion is provided on the peripheral wall of the frame body, and both the first and second groove insulating paper limiting portions are located within the winding groove; each winding groove is provided with a second groove insulating paper limiting portion; the first groove insulating paper limiting portion has a first limiting groove, and the second groove insulating paper limiting portion has a second limiting groove, with the insertion ports of the first and second limiting grooves facing the first end of the frame body. And / or the winding portion is provided with a third groove insulating paper limiting portion, which is located within the winding groove; the first, second, and third groove insulating paper limiting portions are all near the first end of the frame body; the third groove insulating paper limiting portion has a third limiting groove, with the insertion port of the third limiting groove facing the first end of the frame body.

[0009] As can be seen from the above scheme, by setting slot insulation paper limiting parts on the slot wall located in the winding slot within the frame body, the slot insulation paper is fixed at both ends radially of the frame body. This ensures that the slot insulation paper and windings remain in the correct position during operation, preventing displacement and loosening, reducing problems such as winding of the slot insulation paper, and minimizing displacement of the slot insulation paper due to vibration. This improves the stability of the slot insulation paper and windings in the centrally wound frequency converter motor, thereby improving the motor's insulation performance, reducing the risk of short circuits between the motor windings and the stator core, lowering the risk of leakage current in the centrally wound frequency converter stator, and improving motor reliability. Furthermore, the first and second slot insulation paper limiting parts provide better fixation of the slot insulation paper. The third slot insulation paper limiting part on the winding section ensures a tight fit between the slot insulation paper and the winding section, making frequency converter stator winding more convenient and significantly reducing problems such as coil scattering, loosening, and slotting, thus improving the insulation reliability and safety of the motor. Simultaneously, this insulation frame is easy to install, has high production efficiency, and low cost.

[0010] A preferred embodiment is that there are two or more third slot insulating paper limiting parts, and in each winding slot, at least one third slot insulating paper limiting part located in the winding slot is provided on each of the two winding parts that form the winding slot.

[0011] It can be seen that by setting a third slot insulation paper limiting part on both sides of the slot insulation paper, the stability of the slot insulation paper and winding installation is further improved.

[0012] A further option is to provide at least three or more third slot insulating paper limiting parts in at least one winding slot, wherein at least two third slot insulating paper limiting parts are arranged at intervals along the extension direction of the corresponding winding part.

[0013] It can be seen that the setting of multiple third slot insulation paper limiting parts can ensure that the slot insulation paper fits tightly with the inner wall of the winding slot, further improving the stability of the connection between the two.

[0014] A preferred embodiment is that at least one winding groove is provided with two or more second groove insulating paper limiting parts, and each second groove insulating paper limiting part is arranged at intervals along the circumference of the skeleton body.

[0015] It can be seen that by setting multiple second slot insulation paper limiting parts, the slot insulation paper is ensured to fit tightly with the frame body.

[0016] A preferred embodiment is that the depth of the winding groove in the radial direction of the skeleton body is D, the width of the second groove insulating paper limiting part in the radial direction of the skeleton body is d, d≤D / 5; and / or the arc length of the groove wall of the winding groove on the skeleton body is L, and the length of the second groove insulating paper limiting part in the circumferential direction of the skeleton body is L1, L1≤L / 5.

[0017] It is evident that by reasonably limiting the size of the second groove insulating paper limiting part, the stability and reliability of the fixing effect are ensured.

[0018] In a preferred embodiment, the first groove insulating paper limiting portion includes a first axial limiting portion and a first radial limiting portion arranged at an angle. The first radial limiting portion extends along the axial direction of the skeleton body and is connected to a corresponding baffle portion through the first axial limiting portion. The first axial limiting portion, the first radial limiting portion, and the baffle portion form a first limiting groove. And / or the second groove insulating paper limiting portion includes a second axial limiting portion and a second radial limiting portion arranged at an angle. The second radial limiting portion extends along the axial direction of the skeleton body and is connected to the peripheral wall of the skeleton body through the second axial limiting portion. The second axial limiting portion, the second radial limiting portion, and the skeleton body form a second limiting groove.

[0019] It can be seen that the first axial limiting part and the second axial limiting part can limit the slotted insulating paper in the axial direction of the skeleton body, and the first radial limiting part and the second radial limiting part can limit the slotted insulating paper in the radial direction of the skeleton body, thereby ensuring stable positioning between the insulating slotted paper and the insulating skeleton.

[0020] To achieve the second objective of this utility model, this utility model provides a stator, including a stator core, slot insulating paper, and two insulating frames; the two insulating frames are respectively disposed at both ends of the stator core, and at least one of the two insulating frames is an insulating frame as described above; the number of slot insulating papers is equal to the number of winding slots, and each winding slot is provided with slot insulating paper, and the first slot insulating paper limiting part, the second slot insulating paper limiting part, and the third slot insulating paper limiting part are all matched with the edge limiting part of the slot insulating paper.

[0021] As can be seen from the above scheme, by setting slot insulation paper limiting parts on the slot wall located in the winding slot within the frame body, the slot insulation paper is fixed at both ends radially of the frame body. This ensures that the slot insulation paper and windings remain in the correct position during operation, preventing displacement and loosening. It also reduces problems such as the winding of the slot insulation paper, minimizing displacement caused by vibration, and improving the stability of the slot insulation paper and windings in the centrally wound frequency converter motor. This, in turn, improves the motor's insulation performance, reduces the risk of short circuits between the motor windings and the stator core, lowers the risk of leakage current in the centrally wound frequency converter stator, and improves motor reliability. Furthermore, the setting of the first and second slot insulation paper limiting parts better secures the slot insulation paper, making frequency converter stator winding more convenient and significantly reducing problems such as coil scattering, loosening, and slotting, thus improving the insulation reliability and safety of the motor. Simultaneously, this insulation frame is easy to install, has high production efficiency, and low cost. Furthermore, by setting the insulating frame of this utility model at both ends of the stator core, the overall slot insulating paper is ensured to fit tightly with the winding slot, thus preventing misalignment of the slot insulating paper to the greatest extent.

[0022] A preferred embodiment is that the height of the stator core is H, and the height of the second slot insulating paper limiting part in the axial direction of the frame body is h, where H / 20≤h≤H / 5.

[0023] To achieve the third objective of this utility model, this utility model provides an electric motor, including the stator described above.

[0024] To achieve the fourth objective of this utility model, this utility model provides an electrical appliance, including the aforementioned motor. Attached Figure Description

[0025] Figure 1 This is a structural diagram of an embodiment of the stator of this utility model.

[0026] Figure 2 This is an exploded view of the stator embodiment of this utility model from a three-dimensional perspective.

[0027] Figure 3 This is an exploded view of the stator embodiment of this utility model from the main viewpoint.

[0028] Figure 4This is a top view of an embodiment of the stator of this utility model.

[0029] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle.

[0030] Figure 6 This is a perspective view of an embodiment of the insulating frame of this utility model.

[0031] Figure 7 yes Figure 6 A magnified view of a section at point B.

[0032] Figure 8 This is a top view of an embodiment of the insulating frame of this utility model.

[0033] Figure 9 yes Figure 8 A magnified view of a section at point C.

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0035] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present invention or its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0036] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] In this invention, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not exist between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may not be directly connected to the other devices but may have an intermediary device.

[0038] All terms used in this invention (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having the meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0039] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0040] The electrical appliance in this embodiment includes a motor, which is a centralized winding variable frequency motor, and the motor includes a rotor and a stator.

[0041] See Figures 1 to 3 The stator includes a stator core 1, windings (not shown), slot insulation paper 10, and two insulating frames 2, which are respectively disposed at both ends of the stator core 1.

[0042] The insulating frame 2 includes a frame body 3, a winding section 4, and a baffle section 5. The frame body 3 is annular, and there are multiple winding sections 4 and baffle sections 5. Each winding section 4 and baffle section 5 is arranged in a one-to-one correspondence. The winding is wound on the winding section 4, and each winding section 4 is arranged circumferentially along the frame body 3 and extends radially from the peripheral wall of the frame body 3. Each baffle section 5 is located at the end of the corresponding winding section 4 furthest from the frame body 3. Two adjacent winding sections 4 and their corresponding baffle sections 5, together with the frame body 3, form a winding groove 6, and two adjacent baffle sections 5 form the opening 61 of the winding groove 6. The number of slot insulating papers 10 is equal to the number of winding grooves 6, and each winding groove 6 contains slot insulating paper 10. The winding is electrically insulated from the stator core 1 through the slot insulating paper 10 and the winding section 4.

[0043] See Figures 4 to 8 Both ends of the baffle portion 5 are provided with a first slot insulating paper limiting portion 7 near the slot opening 61. A second slot insulating paper limiting portion 8 is provided on the peripheral wall of the frame body 3. A third slot insulating paper limiting portion 9 is provided on the winding portion 4. The first slot insulating paper limiting portion 7, the second slot insulating paper limiting portion 8, and the third slot insulating paper limiting portion 9 are all located in the winding slot 6 and are all located near the first end of the frame body 3. The first end of the frame body 3 is the axial end of the frame body 3 near the stator core 1.

[0044] In this embodiment, there are two second slot insulating paper limiting parts 8 in each winding groove 6 and two third slot insulating paper limiting parts 9. A third slot insulating paper limiting part 9 located in the winding groove 6 is provided on each of the two winding parts 4 that form the winding groove 6.

[0045] The first slotted insulating paper limiting part 7 is provided with a first limiting groove 71, the second slotted insulating paper limiting part 8 is provided with a second limiting groove 81, and the third slotted insulating paper limiting part 9 is provided with a third limiting groove 91. The insertion port 72 of the first limiting groove 71, the insertion port 82 of the second limiting groove 81, and the insertion port 92 of the third limiting groove 91 all face the first end of the skeleton body 3. The edge of the slotted insulating paper extends into the corresponding limiting groove through each insertion port, thereby realizing the limiting cooperation between the first slotted insulating paper limiting part 7, the second slotted insulating paper limiting part 8, and the third slotted insulating paper limiting part 9 and the edge of the slotted insulating paper.

[0046] The first slot insulating paper limiting part 7, the second slot insulating paper limiting part 8, and the third slot insulating paper limiting part 9 are all L-shaped. The first slot insulating paper limiting part 7 includes a first axial limiting part 73 and a first radial limiting part 74 arranged at an angle. The first radial limiting part 74 extends along the axial direction of the frame body 3 and is connected to the corresponding baffle part 5 through the first axial limiting part 73. The first axial limiting part 73, the first radial limiting part 74, and the baffle part 5 form a first limiting groove 71. The second slot insulating paper limiting part 8 includes a second axial limiting part 83 and a second radial limiting part 84 arranged at an angle. The second radial limiting part 84 extends along the axial direction of the frame body 3 and is connected to the peripheral wall of the frame body 3 through the second axial limiting part 83. The second axial limiting part 83, the second radial limiting part 84, and the frame body 3 form a second limiting groove 81. The third groove insulating paper limiting part 9 includes a third axial limiting part 93 and a chordal limiting part 94 arranged at an angle. The chordal limiting part 94 extends along the axial direction of the skeleton body 3. The chordal limiting part 94 is connected to the peripheral wall of the skeleton body 3 through the third axial limiting part 93. The third axial limiting part 93, the chordal limiting part 94 and the corresponding winding part 4 form a third limiting groove 91.

[0047] See Figure 9 The depth of the winding groove 6 in the radial direction of the frame body 3 is D, the width of the second groove insulating paper limiting part 8 in the radial direction of the frame body 3 is d, d≤D / 5, the arc length of the groove wall of the winding groove 6 on the frame body 3 is L, the length of the second groove insulating paper limiting part 8 in the circumferential direction of the frame body 3 is L1, L1≤L / 5, the height of the stator core 1 is H, and the height of the second groove insulating paper limiting part 8 in the axial direction of the frame body 3 is h, H / 20≤h≤H / 5.

[0048] As can be seen from the above, by setting slot insulation paper limiting parts on the slot wall of the frame body within the winding slot, the slot insulation paper is fixed at both ends radially of the frame body. This ensures that the slot insulation paper and windings remain in the correct position during operation, preventing displacement and loosening. It also reduces problems such as winding the slot insulation paper, minimizing displacement caused by vibration, and improving the stability of the slot insulation paper and windings in the centrally wound frequency converter motor. This, in turn, improves the motor's insulation performance, reduces the risk of short circuits between the motor windings and the stator core, lowers the risk of leakage current in the centrally wound frequency converter stator, and enhances motor reliability. Furthermore, the first and second slot insulation paper limiting parts better fix the slot insulation paper, making frequency converter stator winding more convenient and significantly reducing coil scattering, loosening, and slotting problems, thus improving the motor's insulation reliability and safety. Simultaneously, this insulation frame is easy to install, has high production efficiency, and low cost. Furthermore, by setting the insulating frame of this utility model at both ends of the stator core, the overall slot insulating paper is ensured to fit tightly with the winding slot, thus preventing misalignment of the slot insulating paper to the greatest extent.

[0049] In other embodiments, the number of second slot insulating paper limiting portions in each winding slot can be one or more. Alternatively, at least one winding slot may have two or more second slot insulating paper limiting portions, which are spaced apart along the circumferential direction of the frame body. The number of third slot insulating paper limiting portions can also be one or more. When there are two or more third slot insulating paper limiting portions in one winding slot, at least one third slot insulating paper limiting portion located in the winding slot is provided on each of the two winding portions forming the winding slot. Alternatively, at least one winding slot may have three or more third slot insulating paper limiting portions, wherein at least two third slot insulating paper limiting portions are spaced apart along the extension direction of the corresponding winding portion. The shape, size, number, and position of the slot insulating paper limiting portions can be changed as needed. In the two insulating frames, only one may be provided with both second and third slot insulating paper limiting portions. The insulating frame may also only have first and second slot insulating paper limiting portions, without third slot insulating paper limiting portions. The above changes can also achieve the purpose of this utility model.

[0050] Finally, it should be emphasized that the above are only preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An insulating frame, comprising a frame body, a winding section, and a baffle section; The skeleton body is ring-shaped, and there are multiple winding parts and multiple baffle parts, with each winding part and baffle part being arranged in a one-to-one correspondence. Each of the winding portions is arranged circumferentially along the skeleton body and extends radially from the peripheral wall of the skeleton body. Each of the baffle portions is respectively disposed at the end of the corresponding winding portion away from the skeleton body. Two adjacent winding portions and their corresponding baffle portions together with the skeleton body form a winding groove, and two adjacent baffle portions form the opening of the winding groove. Both ends of the baffle are provided with first groove insulating paper limiting parts near the groove opening; Its features are: A second slotted insulating paper limiting part is provided on the peripheral wall of the skeleton body. Both the first slotted insulating paper limiting part and the second slotted insulating paper limiting part are located within the winding groove. Each winding groove is provided with a second slotted insulating paper limiting part. The first slotted insulating paper limiting part has a first limiting groove, and the second slotted insulating paper limiting part has a second limiting groove. The insertion ports of the first and second limiting grooves both face the first end of the skeleton body along its axial direction. The winding section is provided with a third groove insulating paper limiting part, which is located inside the winding groove; the first groove insulating paper limiting part, the second groove insulating paper limiting part and the third groove insulating paper limiting part are all close to the first end of the skeleton body; the third groove insulating paper limiting part is provided with a third limiting groove, and the insertion port of the third limiting groove faces the first end of the skeleton body in the axial direction.

2. The insulating frame according to claim 1, characterized in that: The number of the third groove insulating paper limiting part is two or more. In each winding groove, at least one third groove insulating paper limiting part located in the winding groove is provided on the two winding parts that form the winding groove.

3. The insulating frame according to claim 2, characterized in that: At least one of the winding slots is provided with three or more third slot insulating paper limiting parts, wherein at least two of the third slot insulating paper limiting parts are arranged at intervals along the extension direction of the corresponding winding part.

4. The insulating frame according to any one of claims 1 to 3, characterized in that: At least one of the winding grooves is provided with two or more second groove insulating paper limiting parts, and each second groove insulating paper limiting part is arranged at intervals along the circumference of the skeleton body.

5. The insulating frame according to any one of claims 1 to 3, characterized in that: The depth of the winding groove in the radial direction of the skeleton body is D, and the width of the second groove insulating paper limiting part in the radial direction of the skeleton body is d, where d ≤ D / 5; and / or The arc length of the groove wall on the skeleton body of the winding groove is L, and the length of the second groove insulating paper limiting part in the circumferential direction of the skeleton body is L1, where L1≤L / 5.

6. The insulating frame according to any one of claims 1 to 3, characterized in that: The first groove insulating paper limiting portion includes a first axial limiting portion and a first radial limiting portion arranged at an included angle. The first radial limiting portion extends along the axial direction of the skeleton body. The first radial limiting portion is connected to a corresponding baffle portion through the first axial limiting portion. The first axial limiting portion, the first radial limiting portion, and the baffle portion form the first limiting groove; and / or The second groove insulating paper limiting part includes a second axial limiting part and a second radial limiting part arranged at an angle. The second radial limiting part extends along the axial direction of the skeleton body. The second radial limiting part is connected to the peripheral wall of the skeleton body through the second axial limiting part. The second axial limiting part, the second radial limiting part and the skeleton body form the second limiting groove.

7. A stator, comprising a stator core, slot insulation paper, and two insulating frames, wherein the two insulating frames are respectively disposed at both ends of the stator core; Its features are, At least one of the two insulating frames is an insulating frame as described in any one of claims 1 to 6; The number of slotted insulating paper is equal to the number of winding slots. Each winding slot is provided with slotted insulating paper. The first slotted insulating paper limiting part and the second slotted insulating paper limiting part are both limited and matched with the edge of the slotted insulating paper.

8. The stator according to claim 7, characterized in that: The height of the stator core is H, and the height of the second slot insulating paper limiting part in the axial direction of the frame body is h, where H / 20≤h≤H / 5.

9. An electric motor, characterized in that, Includes the stator as described in claim 8.

10. An electrical appliance, characterized in that, Includes the motor as described in claim 9.

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