A transformer

Abstract

The utility model belongs to the field of magnetic component, provide a kind of transformer, including first core, second core, winding coil and steel band, winding coil includes primary winding and secondary winding, the end of first core and the end of second core correspond splicing cooperation, the splicing place of first core and second core is provided with the insulation framework for winding winding coil, insulation framework includes insulating sleeve and two baffle, two baffle are respectively communicated at the both ends of insulating sleeve, the end of first core and second core is located in insulating sleeve, insulating sleeve is provided with the insulating piece for isolating primary winding and secondary winding, steel band passes through insulating sleeve and is wrapped fixed along the outer circumferential side surface of first core and second core, to realize automation production, improve production efficiency, guarantee the safe insulation distance between winding coil and core.

Description

Technical Field

[0001] This utility model belongs to the field of magnetic components technology, and in particular relates to a transformer. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] CD-type wound core transformers have advantages such as high design flux density, small size and high reliability, and are therefore widely used in products with high reliability requirements, such as military products, industrial control, and high-power UPS power supplies.

[0004] Traditional CD-type wound core transformers typically use a base cylinder made of epoxy glass cloth through a lamination process as the coil frame. When winding the coil, a 3-5 mm edge needs to be reserved at both ends of the coil, and epoxy resin is used for end sealing. An insulating paper is placed between each layer of winding to ensure electrical insulation between windings and smooth winding.

[0005] However, the above-mentioned winding process requires manual winding, which is relatively complex and difficult to automate, resulting in low production efficiency and difficulty in ensuring a safe distance between the coil and the iron core. Utility Model Content

[0006] In order to solve at least one of the technical problems existing in the background art, the present invention provides a transformer that can ensure a safe insulation distance between the coil and the iron core, realize automated winding, and improve production efficiency.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A transformer includes a first core, a second core, winding coils, and a steel strip. The winding coils include a primary winding and a secondary winding. The ends of the first core and the second core are correspondingly spliced ​​together. An insulating frame for winding the winding coils is provided at the splice point of the first core and the second core. The insulating frame includes an insulating sleeve and two baffles. The two baffles are respectively connected to the two ends of the insulating sleeve. The ends of the first core and the second core are both located inside the insulating sleeve. An insulating component for isolating the primary winding and the secondary winding is provided on the insulating sleeve. The steel strip passes through the insulating sleeve and wraps and fixes itself along the outer peripheral surface of the first core and the second core.

[0008] In a preferred embodiment, the partition plate is fixedly sleeved on the insulating sleeve, and a primary winding space for winding the primary winding and a secondary winding space for winding the secondary winding are respectively provided between the partition plate and the two baffles.

[0009] In a preferred embodiment, both baffles and the partition plate are provided with a plurality of lead slots for the primary winding and secondary winding leads.

[0010] In a preferred embodiment, the insulating component is a through-hole mounting sleeve. The top and bottom of the mounting sleeve are provided with an insulating skeleton and a receiving groove for accommodating the insulating skeleton. An opening is provided on one side of the receiving groove, and the insulating skeleton slides and engages with the corresponding mounting sleeve through the opening.

[0011] In a preferred embodiment, the bottom of the mounting sleeve is provided with two limiting plates, which are respectively located on opposite sides of the receiving groove at the bottom of the mounting sleeve.

[0012] In a preferred embodiment, the insulating sleeve is configured as two sections, and the two baffles are respectively disposed at the ends of the two insulating sleeve sections that are far apart. The partition plate includes a first partition plate and a second partition plate, which are respectively fixedly sleeved on the two ends of the two insulating sleeve sections that are close to each other. The first partition plate and the second partition plate are spliced ​​together.

[0013] In a preferred embodiment, the first partition plate is provided with a protrusion, and the second partition plate is provided with a groove corresponding to the protrusion, wherein the protrusion and the groove slide in engagement.

[0014] In a preferred embodiment, the second partition plate is provided with two limiting protrusions for defining the protrusions, the limiting protrusions being located on opposite sides of the groove opening.

[0015] In a preferred embodiment, there are two first iron cores and two second iron cores, and the sides of the two first iron cores that are close to each other and the sides of the two second iron cores that are close to each other are located in the same insulating sleeve.

[0016] In a preferred embodiment, a third core is disposed above the two first cores, and a fourth core is disposed below the two second cores. The two ends of the third core are spliced ​​and fitted with the two ends of the fourth core. The two sides of the third core and the fourth core, the side of the two first cores that are far away from each other, and the side of the two second cores that are far away from each other are all located inside the corresponding insulating sleeve.

[0017] The beneficial effects of this utility model are as follows: This utility model sets an insulating frame to directly limit the upper and lower ends of the winding coil, and sets an insulating component to assemble with the insulating frame to isolate the primary winding and the secondary winding. It eliminates the need to manually leave gaps at both ends of the coil, and the ends of the winding coil are treated with epoxy resin end sealing. In addition, each winding layer is padded with a layer of insulating paper, which can ensure a safe insulation distance between the coil and the iron core, simplify the winding process, realize automated winding production, and improve production efficiency.

[0018] Advantages of the present invention in additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0020] Figure 1 This is a cross-sectional view of the first structure of the transformer according to Embodiment 1 of this utility model; Figure 2 This is a cross-sectional view of the second structure of the transformer according to Embodiment 1 of this utility model; Figure 3 This is a cross-sectional view of the third structure of the transformer according to Embodiment 1 of this utility model; Figure 4 This is a perspective view of the insulating frame of Embodiment 2 of this utility model; Figure 5 This is another structural cross-sectional view of the insulating frame of Embodiment 2 of this utility model; Figure 6 This is an exploded perspective view of the insulating frame and insulating components of Embodiment 3 of this utility model; Figure 7 This is a schematic diagram of the planar structure of the insulating component in Embodiment 3 of this utility model; Figure 8 This is a cross-sectional view of the insulating frame and insulating components of Embodiment 4 of this utility model.

[0021] Among them, 1. First iron core; 2. Second iron core; 3. Winding coil; 301. Primary winding; 302. Secondary winding; 4. Insulating frame; 5. Insulating sleeve; 6. Baffle; 7. Primary winding space; 8. Secondary winding space; 9. Insulating layer; 10. Third iron core; 11. Fourth iron core; 12. Separator plate; 1201. First separator plate; 1202. Second separator plate; 13. Protrusion; 14. Groove; 15. Limiting protrusion; 16. Mounting sleeve; 17. Receiving groove; 18. Limiting plate; 19. Isolation sleeve; 20. Elastic hook; 21. Perforation; 22. Locking hole; 23. Steel strip. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] To address the issues in the background technology, this utility model provides a transformer that effectively limits the two ends of the winding coil 3 by setting an insulating frame 4 and insulating components, and isolates the primary winding 301 and the secondary winding 302. This eliminates the need to manually leave the two ends of the winding coil 3 open, seal the two ends of the winding coil 3 with epoxy resin, and pad each winding layer with a layer of insulating paper to ensure a safe insulation distance between the winding coil 3 and the iron core. This simplifies the winding process, enables automated winding production, and improves production efficiency.

[0026] The specific structure of a transformer according to this utility model will be explained in detail below with reference to the accompanying drawings. Example 1

[0027] Reference Figure 1 A transformer includes a first iron core 1, a second iron core 2, a winding coil 3, and a steel strip 23. In this embodiment, the winding coil 3 includes a primary winding 301 and a secondary winding 302. Both the first iron core 1 and the second iron core 2 are arranged in a U-shape, and the two ends of the first iron core 1 are respectively spliced ​​and matched with the ends of the second iron core 2, thereby forming a pair of iron cores.

[0028] An insulating frame 4 is provided at the joint between the first core 1 and the second core 2. Specifically, the insulating frame 4 includes two baffles 6 and an insulating sleeve 5. The two baffles 6 have through holes that are arranged in a through manner, so that the two baffles 6 are respectively connected to the two ends of the insulating sleeve 5, and the through holes are coaxially arranged with the insulating sleeve 5. The ends of the first core 1 and the second core 2 are located inside the insulating sleeve 5. The steel strip 23 passes through the two baffles 6 and the insulating sleeve 5 and is wrapped and fixed along the outer peripheral surface of the first core 1 and the second core 2.

[0029] Furthermore, the insulating sleeve 5 is provided with an insulating element for isolating the primary winding 301 and the secondary winding 302. The insulating element divides the space on the insulating frame 4 into a primary winding space 7 and a secondary winding space 8. In this embodiment, the insulating element is an insulating layer 9 made of insulating material. Preferably, the insulating layer 9 can be insulating tape or insulating paper. The two sides of the insulating layer 9 abut against the opposite sides of the two baffles 6. During assembly, the primary winding 301 is first wound along the insulating sleeve 5, and then an insulating layer 9 is wrapped around the side of the primary winding 301 away from the insulating sleeve 5, and then the secondary winding 302 is wound. Thus, the two baffles 6 limit and insulate the upper and lower ends of the winding coil 3, eliminating the need for epoxy resin end sealing treatment at both ends of the winding coil 3. In this embodiment, the insulating frame 4 is made of EI silicon steel sheet.

[0030] like Figure 2 As shown, there can be two of each of the first iron core 1 and the second iron core 2, forming two pairs of iron cores. In this case, the two first iron cores and the two second iron cores are spliced ​​together to form an "m" shape. Specifically, the insulating frame 4 is set on the side where the two pairs of iron cores are close to each other, that is, the side where the two first iron cores 1 are close to each other and the side where the two second iron cores 2 are close to each other are located inside the insulating sleeve 5. At this time, the steel strip 23 is wrapped and fixed along the outer circumferential surface of the two pairs of iron cores.

[0031] like Figure 3 As shown, based on the setting of two pairs of iron cores, a third iron core 10 is set above the two first iron cores 1, and a fourth iron core 11 is set below the two second iron cores 2. The two ends of the third iron core 10 are spliced ​​and matched with the corresponding ends of the fourth iron core 11, so that the two pairs of iron cores are located in the space where the third iron core 10 and the fourth iron core 11 are spliced. At this time, an insulating frame 4 is set at the splice of the third iron core 3 and the fourth iron core 4. The ends of the first iron core 1 and the second iron core 2 that are far apart, the two ends of the third iron core 10 and the two ends of the fourth iron core 11 are all located in the corresponding insulating sleeves 5. The steel strip 23 is wrapped around the outer periphery of the third iron core 10 and the fourth iron core 11 and is fixed by passing through the insulating sleeves 5 located at the two ends of the third iron core 10 and the fourth iron core 11. Example 2

[0032] like Figure 4As shown, unlike Embodiment 1, the insulating component is a partition plate 12, which is fixedly sleeved on the insulating sleeve 5. The cross-sectional area of ​​the partition plate 12 is equal to the cross-sectional area of ​​the baffle 6, so that the secondary winding space 8 is located above the primary winding space 7. The primary winding 301 and the secondary winding 302 are wound along the insulating sleeve 5 in the corresponding spaces, thereby insulating and isolating the primary winding 301 and the secondary winding 302 without the need for an insulating paper between the windings. In addition, several lead slots for the primary winding 301 and the secondary winding 302 can be formed on the partition plate 12 and the two baffles 6. In this embodiment, several lead slots are respectively arranged on the partition plate 12 and the two baffles 6 on opposite sides.

[0033] like Figure 5 As shown, the partition plate 12 includes a first partition plate 1201 and a second partition plate 1202. The insulating sleeve 5 is configured as two sections. Two baffles 6 are respectively connected to the far ends of the two insulating sleeve sections 5. The first partition plate 1201 and the second partition plate 1202 are respectively fixedly sleeved on the near ends of the two insulating sleeve sections 5. The first partition plate 1201 and the second partition plate 1202 are spliced ​​together to form the primary winding space 7 and the secondary winding space 8.

[0034] Specifically, the bottom of the first partition plate 1201 is connected to two T-shaped protrusions 13. Correspondingly, the top of the second partition plate 1202 is provided with a groove 14 corresponding to the protrusions 13. The protrusions 13 and the grooves 14 slide and engage to facilitate the winding and assembly of the winding coil 3. In addition, a limiting protrusion 15 is provided at the opening of the groove 14 to limit the position of the protrusions 13. The limiting protrusion 15 is provided along the length direction of the opening of the groove 14 to prevent the protrusions 13 from falling out of the groove 14. Example 3

[0035] like Figure 6 and Figure 7 As shown, unlike Embodiments 1 and 2, the insulating component is a through-type mounting sleeve 16. The top and bottom of the mounting sleeve 16 are respectively provided with receiving grooves 17 for accommodating the insulating skeleton 4. The receiving grooves 17 communicate with the interior of the mounting sleeve 16, and one side of the receiving groove 17 has an opening. In this embodiment, the insulating skeleton 4 is configured as two sets, located in the receiving grooves 17 at the top and bottom of the mounting sleeve 16, respectively. The insulating skeleton 4 slides and engages with the receiving groove 17 through the opening, thereby forming the primary winding space 7 and the secondary winding space 8, so as to isolate the primary winding 301 and the secondary winding 302 during winding. To prevent the insulating skeleton 4 located at the bottom of the mounting sleeve 16 from falling out of the receiving groove 17 during winding, two limiting plates 18 are provided at the bottom of the mounting sleeve 16. The two limiting plates 18 are located on opposite sides of the opening of the receiving groove 17 at the bottom of the mounting sleeve 16 and are arranged along the length direction of the receiving groove 17. Example 4

[0036] like Figure 8 As shown, unlike Embodiment 1, one baffle 6 is fixedly connected to the bottom of the insulating sleeve 5, and another baffle 6 is movably covered on the top of the insulating sleeve 5. In this embodiment, the insulating component is an isolation sleeve 19. The top of the isolation sleeve 19 is fixedly connected to the baffle 6 movably covered on the insulating sleeve 5. The baffle 6, the insulating sleeve 5, and the isolation sleeve 19 are all through-type and coaxially arranged. The isolation sleeve 19 is sleeved on the insulating sleeve 5, and the side length of the isolation sleeve 19 is greater than the side length of the insulating sleeve 5, so that there is a space between the isolation sleeve 19 and the insulating sleeve 5 to form the primary winding space 7.

[0037] The bottom of the isolation sleeve 19 is provided with two elastic hooks 20, which are located on both sides of the isolation sleeve 19. The baffle 6 connected to the bottom of the insulating sleeve 5 has a through hole 21 and a locking hole 22 corresponding to the elastic hooks 20. The locking hole 22 is located on an inner side wall of the through hole 21 and is opened from the bottom of the baffle 6 along the height direction of the through hole 21. When the isolation sleeve 19 is sleeved on the insulating sleeve 5, the baffle 6 connected to the isolation sleeve 19 abuts against the top of the insulating sleeve 5, and the bottom of the isolation sleeve 19 abuts against the baffle 6 located at the bottom of the insulating sleeve 5. The hook holding part of the elastic hook 20 passes through the through hole 21 and hooks and engages with the locking hole 22.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A transformer, comprising a first iron core (1), a second iron core (2), a winding coil (3), and a steel strip (23), wherein the winding coil (3) comprises a primary winding (301) and a secondary winding (302), characterized in that, The end of the first iron core (1) is spliced ​​and matched with the end of the second iron core (2). An insulating frame (4) for winding the winding coil (3) is provided at the splice of the first iron core (1) and the second iron core (2). The insulating frame (4) includes an insulating sleeve (5) and two baffles (6). The two baffles (6) are respectively connected to the two ends of the insulating sleeve (5). The ends of the first iron core (1) and the second iron core (2) are both located inside the insulating sleeve (5). An insulating component for isolating the primary winding (301) and the secondary winding (302) is provided on the insulating sleeve (5). The steel strip (23) passes through the insulating sleeve (5) and wraps and fixes itself along the outer peripheral surface of the first iron core (1) and the second iron core (2).

2. A transformer as described in claim 1, characterized in that, The insulating component is a partition plate (12), which is fixedly sleeved on the insulating sleeve (5). The partition plate (12) and the two baffles (6) are respectively provided with a primary winding space (7) for the primary winding (301) to be wound and a secondary winding space (8) for the secondary winding (302) to be wound.

3. A transformer as described in claim 2, characterized in that, Both baffles (6) and the partition plate (12) are provided with a number of lead slots for the leads of the primary winding (301) and the secondary winding (302).

4. A transformer as described in claim 1, characterized in that, The insulating component is a through-hole mounting sleeve (16). The top and bottom of the mounting sleeve (16) are provided with an insulating skeleton (4) and a receiving groove (17) for accommodating the insulating skeleton (4). An opening is provided on one side of the receiving groove (17), and the insulating skeleton (4) slides and engages with the corresponding mounting sleeve (16) through the opening.

5. A transformer as described in claim 4, characterized in that, The bottom of the mounting sleeve (16) is provided with two limiting plates (18), which are respectively located on opposite sides of the receiving groove (17) at the bottom of the mounting sleeve (16).

6. A transformer as described in claim 2, characterized in that, The insulating sleeve (5) is configured as two sections, and the two baffles (6) are respectively disposed at the ends of the two insulating sleeves (5) that are far apart. The partition plate (12) includes a first partition plate (1201) and a second partition plate (1202). The first partition plate (1201) and the second partition plate (1202) are respectively fixedly sleeved on the two ends of the two insulating sleeves (5) that are close to each other. The first partition plate (1201) and the second partition plate (1202) are spliced ​​together.

7. A transformer as described in claim 6, characterized in that, The first partition plate (1201) (12) is provided with a protrusion (13), and the second partition plate (1202) (12) is provided with a groove (14) corresponding to the protrusion (13), and the protrusion (13) and the groove (14) slide together.

8. A transformer as described in claim 7, characterized in that, The second partition plate (1202) (12) is provided with two limiting protrusions (15) for limiting the protrusion (13), and the limiting protrusions (15) are located on opposite sides of the groove (14).

9. A transformer as described in claim 1, characterized in that, There are two first iron cores (1) and two second iron cores (2). The side of the two first iron cores (1) that are close to each other and the side of the two second iron cores (2) that are close to each other are located in the same insulating sleeve (5).

10. A transformer as described in claim 9, characterized in that, A third core (10) is provided above the two first cores (1), and a fourth core (11) is provided below the two second cores (2). The two ends of the third core (10) are spliced ​​and matched with the two ends of the fourth core (11). An insulating frame (4) is provided at the splice of the third core (10) and the fourth core (11). The two ends of the third core (10), the two ends of the fourth core (11), and the ends of the two first cores (1) and the two second cores (2) that are far apart are provided in the corresponding insulating sleeves (5).

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