Transformer

Abstract

The utility model relates to the technical field of electrical equipment manufacturing, and discloses a transformer which comprises a shell, at least two frameworks, at least two windings and a magnetic core. The at least two frameworks are arranged in the shell at intervals, each winding is wound on the corresponding framework, and the magnetic cores are inserted into the at least two frameworks respectively. According to the transformer, the gaps are directly formed between the frameworks, the insulativity between the windings is improved, the insulation distance between the windings can be shortened under the condition that the same electrical property requirement is met through the split framework design, and therefore the size of the transformer is reduced, and the insulation strength is improved.

Description

Technical Field

[0001] This utility model relates to the field of power equipment manufacturing technology, and in particular to the design structure of transformers. Background Technology

[0002] Transformers are crucial equipment in power systems, primarily used for voltage transformation, regulation, and power transmission. They typically consist of windings, a frame, and a casing. The windings are the electrical components of the transformer, usually made of copper or aluminum wire. The frame provides mechanical support to the windings, ensuring they maintain a stable position and shape during operation and preventing deformation or displacement. Existing transformers generally use a single-piece frame, resulting in inadequate insulation between the windings. Therefore, it's necessary to increase the discharge distance between the windings to meet electrical requirements, thus increasing the transformer's size. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a transformer, comprising:

[0004] shell;

[0005] At least two frames are spaced apart within the outer shell;

[0006] At least two windings, each of the windings being wound around a corresponding frame;

[0007] A magnetic core is inserted into the at least two frames.

[0008] As a further improvement to the above technical solution:

[0009] The at least two frames include a first frame and a second frame, which are arranged opposite to each other; the at least two windings include a first winding and a second winding, with the first winding wound on the first frame and the second winding wound on the second frame; the magnetic core is inserted into the first frame and the second frame.

[0010] The first frame is provided with a first magnetic core window, which penetrates the first frame along a first direction; the second frame is provided with a second magnetic core window, which penetrates the second frame along the first direction; the first magnetic core window and the second magnetic core window are at least partially connected, and the magnetic core is sequentially inserted into the first magnetic core window and the second magnetic core window.

[0011] The first frame has two first support plates at one end away from the second frame. The two first support plates are spaced apart on both sides of the first magnetic core window along a second direction (direction B in the figure). The magnetic core portion is disposed between the two first support plates. The second direction is perpendicular to the first direction.

[0012] The first frame has a first support plate at one end away from the second frame. The first support plate is disposed on one side of the first magnetic core window along the second direction. The side of the first support plate facing the magnetic core at the bottom has a first support protrusion for supporting the magnetic core. The second direction is perpendicular to the first direction.

[0013] The first frame is provided with a first winding groove, and the first winding is wound in the first winding groove.

[0014] The first frame has a first wire groove baffle at one end away from the second frame. The first wire groove baffle has a first lead wire groove that communicates with the first winding groove. The lead wire of the first winding extends through the first lead wire groove to the outside of the first frame.

[0015] The outer shell is provided with a slot, and the at least two skeletons are respectively locked in the slot.

[0016] The outer shell is provided with at least two limiting plates, which are spaced apart, and the at least two frames abut against the at least two limiting plates respectively.

[0017] It also includes a potting structure disposed within the housing, the potting structure being used to fix the at least two skeletons, the at least two windings, and the magnetic core.

[0018] Compared with the prior art, the advantages of this utility model are:

[0019] The transformer includes a housing, at least two frames, at least two windings, and a magnetic core. The at least two frames are spaced apart inside the housing. Each winding is wound around a corresponding frame. The magnetic core is inserted into each of the at least two frames. The frames are separated by gaps, which increases the insulation between the windings. Through the split frame design, the insulation distance between the windings can be shortened while meeting the same electrical requirements, thereby reducing the size of the transformer and increasing the insulation strength. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the transformer in the embodiment.

[0021] Figure 2 This is a schematic diagram of the outer shell in the embodiment.

[0022] Figure 3 This is a schematic diagram of the transformer structure in the embodiment (the casing and potting structure are not shown).

[0023] Figure 4This is a schematic diagram of the assembly of the first frame and the first winding in the embodiment.

[0024] Figure 5 This is a schematic diagram of the structure of the first skeleton in the embodiment.

[0025] Figure 6 This is a schematic diagram of the assembly of the second frame and the second winding in the embodiment.

[0026] Figure 7 This is a schematic diagram of the second skeleton in the embodiment.

[0027] Figure 8 This is a cross-sectional schematic diagram of the transformer in the embodiment.

[0028] Figure 9 This is a schematic diagram of the magnetic core in the embodiment.

[0029] The labels in the diagram represent:

[0030] 1. Outer shell; 11. Base plate; 111. Limiting plate; 112. Locking block; 112a. Locking slot; 12. Annular side plate; 2. Frame; 21. First frame; 211. First magnetic core window; 212. First support plate; 213. First support protrusion; 214. First winding ring plate; 214a. First winding groove; 215. First wire groove baffle; 215a. First lead wire groove; 216. First reinforcing rib; 22. Second frame; 22 1. Second magnetic core window; 222. Second support plate; 223. Second support protrusion; 224. Second winding ring plate; 224a. Second winding groove; 225. Second groove baffle; 225a. Second lead groove; 226. Second reinforcing rib; 3. Winding; 31. First winding; 32. Second winding; 4. Magnetic core; 4a. First magnetic core; 4b. Second magnetic core; 41. Connecting post; 42. Middle post; 43. Side post; 5. Encapsulation structure. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figure 1 As shown, this embodiment provides a transformer, including: a housing 1, at least two bobbins 2, at least two windings 3, and a magnetic core 4. The at least two bobbins 2 are spaced apart within the housing 1, each winding 3 is wound around a corresponding bobbin 2, and the magnetic core 4 is inserted into at least two bobbins 2 respectively. This split-bobbin design increases the discharge distance between the windings, thereby improving insulation strength.

[0033] like Figure 2As shown, the outer casing 1 includes a base plate 11 and an annular side plate 12. One end of the annular side plate 12 is connected to the base plate 11. The annular side plate 12 and the base plate 11 enclose a receiving cavity, in which at least two skeletons 2, at least two windings 3, and a magnetic core 4 are disposed. The base plate 11 is used to support at least two skeletons 2, and the two ends of the magnetic core 4 abut against the annular side plate 12.

[0034] Furthermore, the base plate 11 is provided with at least two limiting plates 111, which are spaced apart along a first direction (direction A in the figure), and at least two skeletons 2 respectively abut against at least two limiting plates 111. In this embodiment, two skeletons 2 and two limiting plates 111 are used for example illustration. The two skeletons 2 abut against the two limiting plates 111 respectively, and the two limiting plates 111 are used to limit the two skeletons 2 to ensure that the two skeletons 2 are spaced apart.

[0035] Furthermore, the base plate 11 is also provided with at least two locking blocks 112, each locking block 112 being disposed on the side of one limiting plate 111 facing away from the other limiting plate 111. Each locking block 112 and its corresponding limiting plate 111 form an installation position, and each frame 2 is installed within its corresponding installation position. Each locking block 112 and its corresponding limiting plate 111 are used to jointly limit the position of a frame 2. In this embodiment, two locking blocks 112 are used for illustrative purposes. Each locking block 112 is also provided with a locking slot 112a, within which the frame 2 can be formed to further limit its position. The number of locking slots 112a can be set according to actual needs, such as one, two, or three, and is not limited here.

[0036] It is understood that in some other embodiments, the number of limiting plates 111 and card blocks 112 can be set according to actual needs, such as three or four respectively, as long as they can meet the limiting requirements of at least two skeletons, and are not limited here.

[0037] like Figure 3As shown, at least two frames 2 include a first frame 21 and a second frame 22, which are spaced apart along a first direction and are arranged opposite to each other. At least two windings 3 include a first winding 31 and a second winding 32, with the first winding 31 wound on the first frame 21 and the second winding 32 wound on the second frame 22. Magnetic cores 4 are respectively inserted into the first frame 21 and the second frame 22. In this embodiment, the first frame 21 and the second frame 22 have the same structure and are symmetrically arranged, which not only ensures a uniform distribution of the magnetic field and improves the conversion efficiency of the transformer, but also enhances the stability and symmetry of the structure, reducing vibration and noise caused by asymmetry. It is understood that in some other embodiments, the first frame and the second frame can also be configured with different structures, as long as the usage requirements are met, and this is not limited here.

[0038] like Figure 3-7 As shown, the first frame 21 has a first magnetic core window 211, which penetrates the first frame 21 along a first direction. The second frame 22 has a second magnetic core window 221, which penetrates the second frame 22 along the first direction. The first magnetic core window 211 and the second magnetic core window 221 are connected, and the magnetic core 4 is sequentially inserted into the first magnetic core window 211 and the second magnetic core window 221. In this embodiment, the first magnetic core window 211 and the second magnetic core window 221 have the same cross-sectional area, and the first magnetic core window 211 and the second magnetic core window 221 are aligned and connected, so that the magnetic core 4 can be smoothly inserted and penetrate the two frames 2. It is understood that in some other embodiments, the first magnetic core window and the second magnetic core window may also be partially connected, as long as the magnetic core can be inserted, which is not limited here.

[0039] Furthermore, the first frame 21 has two first support plates 212 at its end opposite to the second frame 22, and the two first support plates 212 are spaced apart on both sides of the first magnetic core window 211 along a second direction. The second frame 22 has two second support plates 222 at its end opposite to the first frame 21, and the two second support plates 222 are spaced apart on both sides of the second magnetic core window 221 along a second direction. One end of the magnetic core 4 is positioned between the two first support plates 212, and the other end of the magnetic core 4 is positioned between the two second support plates 222. The first support plates 212 and the second support plates 222 support the magnetic core 4 and limit its position in the second direction, ensuring the relative position of the magnetic core 4 and the winding 3 is stable, thereby improving the stability and reliability of the transformer. The second direction is perpendicular to the first direction.

[0040] It is understood that in some other embodiments, one of the first support plate and the second support plate may be omitted; either the first support plate or the second support plate may be provided, and this is not limited here. In some other embodiments, the number of the first support plates may also be set according to actual needs. For example, only one first support plate may be provided, which is disposed along the second direction on one side of the first magnetic core window 211, and one end of the magnetic core 4 abuts against the first support plate. In some other embodiments, the number of the second support plates may also be set according to actual needs. For example, only one second support plate may be provided, which is disposed along the second direction on one side of the second magnetic core window 221, and one end of the magnetic core 4 abuts against the second support plate. The number and arrangement of the first and second support plates are not limited here.

[0041] Furthermore, one of the first support plates 212 has two first support protrusions 213 on the side facing the magnetic core 4, and the two first support protrusions 213 are spaced apart along a third direction (direction C in the figure). One of the second support plates 222 has two second support protrusions 223 on the side facing the magnetic core 4, and the two second support protrusions 223 are spaced apart along a third direction. The two first support protrusions 213 and the two second support protrusions 223 together support the magnetic core 4, so that the magnetic core 4 is suspended between the first support plate 212 and the second support plate 222, preventing the magnetic core 4 from contacting the first frame 21 and the second frame 22, thus preventing the high-voltage arc from penetrating the first frame 21 or the second frame 22 and causing insulation damage. The first support plate 212 with the first support protrusions 213 and the second support plate 222 with the second support protrusions 223 are located on the same side of the magnetic core 4, and the first support protrusions 213 and the second support protrusions 223 are at the same height, thereby ensuring that the magnetic core 4 can be stably positioned. The third direction is perpendicular to the first direction and the second direction, respectively.

[0042] It is understood that in some other embodiments, the number of the first support bump and the second support bump can be set according to actual needs, such as one or three respectively, and is not limited here. In some other embodiments, one of the first support bump and the second support bump can also be omitted, and only the first support bump or only the second support bump can be set, and is not limited here.

[0043] It is understood that in some other embodiments, the two first support plates may each be provided with a first support protrusion, and the first support protrusions on the two first support plates may abut against the magnetic core respectively, and / or the two second support plates may each be provided with a second support protrusion, and the second support protrusions on the two second support plates may abut against the magnetic core respectively. The arrangement of the first support protrusions and the second support protrusions is not limited here.

[0044] Furthermore, the first frame 21 is provided with a first winding groove 214a, and the first winding 31 is wound within the first winding groove 214a. Specifically, the first frame 21 includes a first winding ring plate 214 and two first groove baffles 215. The two ends of the first winding ring plate 214 along a first direction are respectively connected to the two first groove baffles 215. The two first groove baffles 215 protrude from the first winding ring plate 214 along its circumference. The first winding ring plate 214 and the two first groove baffles 215 together form the first winding groove 214a. The first winding ring plate 214 is used for winding the first winding 31, and the two first groove baffles 215 are used to limit the movement of the first winding 31.

[0045] The first magnetic core window 211 passes sequentially through one of the first wire groove baffles 215, the first winding ring plate 214, and the other first wire groove baffle 215. One of the first wire groove baffles 215, near the end of the second frame 22, abuts against one of the limiting plates 111 of the outer casing 1 to position the first frame 21. A first support plate 212 is provided on the end of the first wire groove baffle 215 away from the second frame 22, and the first support plate 212 is located on the side of the first wire groove baffle 215 facing away from the first winding ring plate 214.

[0046] The second frame 22 is provided with a second winding groove 224a, and the second winding 32 is wound within the second winding groove 224a. Specifically, the second frame 22 includes a second winding ring plate 224 and two second groove baffles 225. The structure of the second winding ring plate 224 and the two second groove baffles 225 is the same as that of the first winding ring plate 214 and the first groove baffle 215, and will not be described again here. The second magnetic core window 221 passes through one of the second groove baffles 225, the second winding ring plate 224, and the other second groove baffle 225 in sequence. One of the second groove baffles 225 near the first frame 21 abuts against another limiting plate 111 of the outer shell 1 to position the second frame 22. A second support plate 222 is provided on the side of the second groove baffle 225 away from the first frame 21, and the second support plate 222 is located on the side of the second groove baffle 225 opposite to the second winding ring plate 224.

[0047] Furthermore, a first wire groove baffle 215 at the end furthest from the second frame 22 is provided with a first lead groove 215a. The lead wire of the first winding 31 extends through the first lead groove 215a to the outside of the first frame 21, so that the lead wire of the first winding 31 can be electrically connected to external components. A second wire groove baffle 225 at the end furthest from the first frame 21 is provided with a second lead groove 225a. The lead wire of the second winding 32 extends through the second lead groove 225a to the outside of the second frame 22, so that the lead wire of the second winding 32 can be electrically connected to external components. The number of the first lead groove 215a and the second lead groove 225a can be set according to actual needs, such as one, two, or three, and is not limited here.

[0048] The first frame 21 is also provided with a first reinforcing rib 216. The first reinforcing rib 216 is located on a first groove baffle 215 at the end away from the second frame 22, and the first reinforcing rib 216 is located on the side of the first groove baffle 215 facing away from the second winding ring plate 224. The first reinforcing rib 216 is located on the side of one of the first support plates 212 facing away from the other support plate 212, and the first reinforcing rib 216 is connected to one of the first support plates 212. There is at least one first reinforcing rib 216, and at least one first reinforcing rib 216 is arranged sequentially at intervals along a third direction, and at least one first reinforcing rib 216 is connected to the first support plate 212 respectively. The at least one first reinforcing rib 216 is used to increase the strength of the first frame 21. Each first reinforcing rib 216 is engaged in a corresponding slot 112a so that the first frame 21 is fixed in the outer shell 1. It should be noted that the number of first reinforcing ribs can be set according to actual needs, such as one, two, or three, and is not limited here. The second frame 22 is provided with a second reinforcing rib 226. The structure of the second reinforcing rib 226 is the same as that of the first reinforcing rib 216, and will not be described in detail here.

[0049] like Figure 6 As shown, the magnetic core 4 is a split design, comprising a first magnetic core 4a and a second magnetic core 4b. The first magnetic core 4a is inserted into the first frame 21, and the second magnetic core 4b is inserted into the second frame 22. The first magnetic core 4a and the second magnetic core 4b have the same structure and are symmetrically arranged along a first direction, with one end of the first magnetic core 4a abutting against one end of the second magnetic core 4b. This split design facilitates the installation of the magnetic core 4.

[0050] The first magnetic core 4a and the second magnetic wire 4b each include a connecting post 41, a central post 42, and two side posts 43, with the central post 42 and the two side posts 43 respectively connected to the same side of the connecting post 41. Specifically, the connecting post 41 extends along a third direction, the central post 42 and the two side posts 43 extend along a first direction, the two side posts 43 are respectively connected to the two ends of the connecting post 41 along the third direction, and the central post 42 is disposed between the two side posts 43 and connected to the middle of the connecting post 41.

[0051] like Figure 4-8 As shown, the connecting post 41 of the first magnetic core 4a is disposed on the first support plate 212, the central post 42 of the first magnetic core 4a is inserted into the first magnetic core window 211, and the two side posts 43 of the first magnetic core 4a are respectively disposed on both sides of the first frame 21 along a third direction. The connecting post 41 of the second magnetic core 4b is disposed on the second support plate 222, the central post 42 of the second magnetic core 4b is inserted into the second magnetic core window 221, and the two side posts 43 of the second magnetic core 4b are respectively disposed on both sides of the second frame 22 along a third direction. The central post 42 of the first magnetic core 4a and the central post 42 of the second magnetic core 4a abut against each other, and the two side posts 43 of the first magnetic core 4a abut against the two side posts 43 of the second magnetic core 4b respectively.

[0052] like Figure 9 As shown, the transformer also includes a potting structure 5, which is disposed inside the housing 1 and covers at least two bobbins 2, at least two windings 3, and a magnetic core 4, for fixing the at least two bobbins 2, at least two windings 3, and magnetic core 4 inside the housing 1. The potting structure 5 is formed by injecting potting compound into the receiving cavity of the housing 1, which can increase the stability and strength of the transformer. Furthermore, the potting compound has good insulation properties, and when filled between at least two bobbins 2, it can increase the insulation strength between the windings 3, shorten the discharge distance between the windings 3 under the same electrical requirements, resulting in higher safety performance and a smaller transformer size.

[0053] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A transformer, characterized in that, include: Outer shell (1); At least two frames (2), the at least two frames (2) including a first frame (21) and a second frame (22), the first frame (21) and the second frame (22) being disposed at a distance from each other in the outer shell (1) along a first direction; At least two windings (3), each of the windings (3) being wound around a corresponding frame (2); A magnetic core (4) is inserted into the at least two frames (2); The first frame (21) is provided with a first magnetic core window (211), which penetrates the first frame (21) along a first direction. The second frame (22) is provided with a second magnetic core window (221), which penetrates the second frame (22) along the first direction. The first magnetic core window (211) and the second magnetic core window (221) are at least partially connected. The central column of the magnetic core (4) is inserted into the first magnetic core window (211) and the second magnetic core window (221) in sequence.

2. The transformer according to claim 1, characterized in that: The first skeleton (21) and the second skeleton (22) are arranged opposite to each other; The at least two windings (3) include a first winding (31) and a second winding (32), wherein the first winding (31) is wound on the first frame (21) and the second winding (32) is wound on the second frame (22).

3. The transformer according to claim 2, characterized in that: The first frame (21) is provided with two first support plates (212) at one end away from the second frame (22). The two first support plates (212) are arranged at intervals on both sides of the first magnetic core window (211) along the second direction. The magnetic core (4) is partially disposed between the two first support plates (212). The second direction is perpendicular to the first direction.

4. The transformer according to claim 2, characterized in that: The first frame (21) is provided with a first support plate (212) at one end away from the second frame (22). The first support plate (212) is arranged along the second direction on one side of the first magnetic core window (211). The side of the first support plate (212) located below facing the magnetic core (4) is provided with a first support protrusion (213). The first support protrusion (213) is used to support the magnetic core (4). The second direction is perpendicular to the first direction.

5. The transformer according to claim 1, characterized in that: The first frame (21) is provided with a first winding groove (214a), and the first winding (31) is wound in the first winding groove (214a).

6. The transformer according to claim 5, characterized in that: The first frame (21) is provided with a first wire groove baffle (215) at one end away from the second frame (22). The first wire groove baffle (215) is provided with a first lead wire groove (215a) that communicates with the first winding groove (214a). The lead wire of the first winding (31) extends through the first lead wire groove (215a) to the outside of the first frame (21).

7. The transformer according to claim 1, characterized in that: The outer shell (1) is provided with a slot (112a), and the at least two skeletons (2) are respectively locked in the slot (112a).

8. The transformer according to claim 1, characterized in that: The outer shell (1) is provided with at least two limiting plates (111), the at least two limiting plates (111) are spaced apart, and the at least two skeletons (2) respectively abut against the at least two limiting plates (111).

9. The transformer according to any one of claims 1-8, characterized in that: It also includes a potting structure (5), which is disposed inside the outer shell (1) and is used to fix the at least two skeletons (2), the at least two windings (3) and the magnetic core (4).

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