A transformer

Abstract

The utility model relates to the technical field of electrical components, specifically discloses a transformer, and the transformer comprises a framework, a winding, an iron core and a wiring board, the winding is sleeved on the framework, the iron core comprises a middle column, an upper yoke fixed to the upper end of the middle column and a lower yoke fixed to the lower end of the middle column, the middle column is arranged in the corresponding framework, the wiring board is fixed to the upper yoke, the wiring board is provided with wiring terminals electrically connected with the winding, and the wiring board is provided with a creeping portion for increasing the creeping distance of the wiring terminals. The transformer provided by the utility model can effectively increase the creeping distance of the wiring terminals and effectively improve the insulation and safety of the whole transformer.

Description

Technical Field

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

[0002] In the prior art, the main components of a control transformer are generally composed of a frame, windings, iron core, and terminal block. The windings are wound on the frame, the iron core core is inserted through the frame, and the terminal block is fixed to the upper yoke of the iron core.

[0003] The existing transformer structural design described above needs to consider the transformer's insulation. Specifically, the insulation includes the insulation between the windings and the upper and lower yokes of the core, as well as the insulation of the terminal block. Poor insulation performance will affect the safety and reliability of the transformer. Utility Model Content

[0004] The purpose of this utility model is to provide a transformer that can effectively increase the creepage distance of the terminals, improve the overall insulation and safety of the transformer, and ensure reliable and stable use.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A transformer, comprising:

[0007] skeleton;

[0008] The winding is sleeved on the frame;

[0009] The iron core includes a central column, an upper yoke fixed to the upper end of the central column, and a lower yoke fixed to the lower end of the central column. The central column is correspondingly arranged with the frame, and the central column passes through the corresponding frame.

[0010] A terminal block is fixed to the upper yoke. The terminal block is provided with terminals that are electrically connected to the winding, and the terminal block has creepage portions for increasing the creepage distance of the terminals.

[0011] Preferably, the creepage section includes creepage grooves and / or creepage holes formed on the terminal block.

[0012] Preferably, a bracket is connected between the terminal block and the upper yoke. The bracket includes a fixing part and a wiring part. One end of the fixing part is connected to the upper yoke, and the other end of the fixing part is connected to the wiring part at an angle. The terminal block is connected to the wiring part.

[0013] Preferably, the bracket and the terminal block are arranged in a one-to-one correspondence, the two terminal blocks are distributed on opposite sides of the upper yoke, and the first fastening bolt passes through one of the fixing parts, the upper yoke, and the other fixing part and is threadedly connected to the first fastening nut.

[0014] Preferably, the frame includes side plates and end plates. The side plates are provided with multiple side plates and are spliced ​​together end to end to form a winding part. The multiple side plates together form a through hole. The end plates are sleeved on both the upper and lower ends of the winding part. The winding is sleeved on the winding part. The upper and lower ends of the winding abut against the end plates at the corresponding ends. The central column is disposed through the through hole and the upper and lower end plates.

[0015] Preferably, in two adjacent side panels, one of the splicing ends is provided with a plug groove, and the other splicing end is provided with a plug connector. The splicing ends of the two side panels are spliced ​​together, and the plug connector is inserted into the plug groove.

[0016] Preferably, there are four side plates, two of which are first side plates and the other two are second side plates. The two first side plates are spaced apart along a first direction, and the two second side plates are spaced apart along a second direction. The two first side plates and the two second side plates are joined together to form a rectangular winding portion. The end plate has a rectangular sleeve hole, and the end plate is sleeved on the winding portion through the sleeve hole.

[0017] Preferably, the first side plate is provided with limiting heads at both the upper and lower ends. The limiting heads protrude from the first side plate along the second direction. The second side plate is provided with a corresponding clearance groove. The limiting heads pass through the clearance groove along the second direction. The limiting heads pass through the sleeve hole and abut against the side of the end plate facing away from the winding.

[0018] Preferably, an insulating gap is formed between the upper end of the winding and the upper yoke, and between the lower end of the winding and the lower yoke.

[0019] Preferably, the upper end face of the first side plate protrudes outward from the second side plate and abuts against the lower end face of the upper yoke; the lower end face of the first side plate protrudes outward from the second side plate and abuts against the upper end face of the lower yoke; and heat dissipation gaps are formed between the upper end face of the second side plate and the upper yoke, and between the lower end face of the second side plate and the lower yoke. Beneficial effects:

[0020] The transformer provided by this utility model has a creepage section on the terminal block. The creepage section can effectively increase the creepage distance of the terminals on the terminal block, improve the overall insulation and safety of the transformer, and make it reliable and stable in use. Attached Figure Description

[0021] Figure 1 A schematic diagram of the transformer provided by this utility model;

[0022] Figure 2A schematic diagram of the terminal block portion provided by this utility model;

[0023] Figure 3 A partial front view of the transformer provided by this utility model;

[0024] Figure 4 A schematic diagram of the skeleton provided by this utility model;

[0025] Figure 5 An exploded view of the skeleton provided for this utility model;

[0026] Figure 6 A partial structural schematic diagram of the skeleton provided in some embodiments of this utility model;

[0027] Figure 7 An exploded view of the skeleton, central column, and windings provided for this utility model.

[0028] In the picture:

[0029] 1. Frame; 11. Side plate; 11A. First side plate; 11B. Second side plate; 1101. Insertion slot; 1102. Insertion connector; 1103. Limiting head; 1104. Clearance groove; 111. Through hole; 12. End plate; 121. Sleeve hole; 122. Heat dissipation hole; 123. Wiring hole;

[0030] 2. Winding; 201. Insulation gap;

[0031] 3. Iron core; 31. Central column; 32. Upper yoke; 33. Lower yoke;

[0032] 4. Terminal block; 41. Terminal block; 42. Cable tray;

[0033] 5. Bracket; 51. Fixing part; 52. Wiring part;

[0034] 61. First fastening bolt; 62. First fastening nut; 63. Second fastening bolt. Detailed Implementation

[0035] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0039] This embodiment provides a transformer. (Refer to...) Figures 1 to 6 As shown, the transformer includes a frame 1, windings 2, an iron core 3, and a terminal block 4. The windings 2 are mounted on the frame 1. The iron core 3 includes a center column 31, an upper yoke 32 fixed to the upper end of the center column 31, and a lower yoke 33 fixed to the lower end of the center column 31. The center column 31 is correspondingly positioned to the frame 1 and passes through the corresponding frame 1. The terminal block 4 is fixed to the upper yoke 32 and has terminals 41 electrically connected to the windings 2. The terminal block 4 also has creepage portions to increase the creepage distance of the terminals 41.

[0040] In this embodiment, a creepage section is provided on the terminal block 4. The creepage section can effectively increase the creepage distance of the terminals 41 on the terminal block 4, improve the overall insulation and safety of the transformer, and make it reliable and stable in use.

[0041] Specifically, in this embodiment, the creepage section includes creepage grooves 42 and / or creepage holes formed on the terminal block 4. By forming creepage grooves 42 and creepage holes on the terminal block 4, the surface area of ​​the terminal block 4 can be further increased, thereby increasing the length of the creepage path and effectively improving the insulation and safety of the transformer.

[0042] For example, when the creepage section is configured as a creepage groove 42 provided on the terminal block 4, the creepage groove 42 can be configured as a V-shaped groove.

[0043] For example, when the creepage section is configured as creepage groove 42 opened on the terminal block 4, there are multiple creepage grooves 42 distributed in a matrix on the terminal block 4.

[0044] In this embodiment, a bracket 5 connects the terminal block 4 and the upper yoke 32. The bracket 5 includes a fixing part 51 and a wiring part 52. One end of the fixing part 51 is connected to the upper yoke 32, and the other end of the fixing part 51 is connected to the wiring part 52 at an angle. The terminal block 4 is connected to the wiring part 52. Specifically, the fixing part 51 and the wiring part 52 are set at a 90° angle. By setting the bracket 5, the fixing part 51 of the bracket 5 is in close contact with the upper yoke 32, achieving effective positioning and facilitating fixation, thus providing reliable and effective support and fixation for the terminal block 4.

[0045] In this embodiment, one end of the terminal block 4 is overlapped and connected to the wiring portion 52. Specifically, the width of the terminal block 4 is greater than the width of the fixing portion 51, which allows the terminal block 4 to be partially suspended relative to the fixing portion 51, thereby facilitating the installation of components such as the wiring terminal 41. Specifically, the creepage groove 42 is formed on the outside of the fixing portion 51.

[0046] In this embodiment, two terminal blocks 4 are provided, and brackets 5 are arranged one-to-one with the terminal blocks 4. The two terminal blocks 4 are distributed on opposite sides of the upper yoke 32. The first fastening bolt 61 passes through one fixing part 51, the upper yoke 32, and the other fixing part 51 and is threadedly connected to the first fastening nut 62. Specifically, the two brackets 5 are correspondingly arranged on opposite sides of the upper yoke 32. The brackets 5 have first mounting holes, and the upper yoke 32 has through holes. The corresponding first mounting holes and corresponding through holes on both sides of the upper yoke 32 are coaxially connected. The first fastening bolt 61 passes through one first mounting hole, the through hole, and the other second mounting hole in sequence and is threadedly connected to the first fastening nut 62.

[0047] For example, the first mounting hole on the bracket 5 is provided in a one-to-one correspondence with the through hole opened on the upper yoke 32.

[0048] In this embodiment, the terminal block 4 and the corresponding bracket 5 are connected by a second fastening bolt 63 and a second fastening nut. Specifically, the terminal block 4 has a third mounting hole, the bracket 5 has a fourth mounting hole, and the second fastening bolt 63 passes through the third mounting hole and the fourth mounting hole and is threadedly connected to the second fastening nut.

[0049] In this embodiment, the frame 1 includes side plates 11 and end plates 12. Multiple side plates 11 are sequentially spliced ​​together to form a winding section. These side plates 11 together enclose a through hole 111. End plates 12 are fitted onto both the upper and lower ends of the winding section. A winding 2 is fitted onto the winding section, with its upper and lower ends abutting against the corresponding end plates 12. A central post 31 is inserted through the through hole 111 and both end plates 12. Specifically, multiple side plates 11 are spliced ​​together end-to-end to form a closed-loop winding section for the fitting section to be fitted. This structure is simple and easy to assemble. The upper and lower ends of the winding 2 abut against the corresponding end plates 12, confining the winding 2 between the upper and lower end plates 12, thereby ensuring reliable and stable installation of the winding 2.

[0050] For example, the central column 31 and the perforation 111 can be a transition fit or an interference fit.

[0051] In this embodiment, the transformer frame 1, winding 2 and center column 31 are provided in three corresponding positions, thus corresponding to the three-phase power of the transformer.

[0052] In this embodiment, one of the two adjacent side plates 11 has a splicing end with an insertion groove 1101, and the other has a splicing end with a protruding insertion connector 1102. The splicing ends of the two side plates 11 are spliced ​​together, and the insertion connector 1102 is inserted into the insertion groove 1101. Specifically, when two adjacent side plates 11 are spliced ​​together, the insertion connector 1102 of one splicing end can be fixedly inserted into the insertion groove 1101 of the other splicing end, realizing the splicing between adjacent side plates 11. The structure is simple and the operation is convenient.

[0053] In this embodiment, four side plates 11 are provided, including two first side plates 11A and two second side plates 11B. The two first side plates 11A are spaced apart along a first direction, and the two second side plates 11B are spaced apart along a second direction. The two first side plates 11A and the two second side plates 11B are joined together to form a rectangular winding portion. The end plate 12 has a rectangular sleeve hole 121, and the end plate 12 is fitted onto the winding portion through the sleeve hole 121. It can be understood that the winding portion formed by the two first side plates 11A and the two second side plates 11B together forms a rectangular through hole 111, and the shape of the central post 31 is also correspondingly set to be rectangular. The two end plates 12 are respectively arranged at the upper and lower ends of the winding portion, and are fixedly fitted onto the winding portion through their own sleeve holes 121.

[0054] In this embodiment, both the upper and lower ends of the first side plate 11A are provided with limiting heads 1103. The limiting heads 1103 protrude from the first side plate 11A along the second direction. The second side plate 11B is provided with a corresponding clearance groove 1104. The limiting heads 1103 pass through the clearance groove 1104 along the second direction. The limiting heads 1103 pass through the sleeve hole 121 and abut against the side of the end plate 12 facing away from the winding 2. By setting a limiting head 1103, when the first side plate 11A and the end plate 12 are installed, the end plate 12 is sleeved on the upper and lower ends of the first side plate 11A. The limiting head 1103 can pass through the sleeve hole 121 of the end plate 12 at the corresponding end and abut against the end face of the end plate 12 facing away from the winding 2. This setting can limit the end plate 12 and ensure that when the upper and lower ends of the winding 2 abut against the end plate 12 at the corresponding end after the winding 2 is installed, the end plate 12 can be limited, which further improves the overall reliability of the frame 1.

[0055] For example, when the perforation 111 is a rectangular hole, the total length of the upper and lower ends of the first side plate 11A, including the limiting head 1103, is less than or equal to the diagonal length of the rectangular perforation 111.

[0056] In some other alternative implementations, the number of side panels 11 can also be set to other numbers, such as 5 or 6.

[0057] In this embodiment, insulation gaps 201 are formed between the upper end of winding 2 and the upper yoke 32, and between the lower end of winding 2 and the lower yoke 33. Specifically, Figure 3 The center-to-center spacing H is the insulation gap 201. This setting ensures sufficient clearance between the upper end of winding 2 and the upper yoke 32, and between the lower end of winding 2 and the lower yoke 33, ensuring reliable and effective insulation. In addition, the insulation gap 201 also provides a certain amount of heat dissipation between the upper and lower ends of winding 2, allowing heat to dissipate.

[0058] Specifically, in this embodiment, when the upper end face of the first side plate 11A is at the same height as the upper end face of the second side plate 11B, the first side plate 11A and the second side plate 11B together abut against the lower end face of the upper yoke 32; when the lower end face of the first side plate 11A is at the same height as the lower end face of the second side plate 11B, the first side plate 11A and the second side plate 11B together abut against the upper end face of the lower yoke 33.

[0059] Furthermore, in some optional embodiments, the upper end face of the first side plate 11A protrudes outward from the second side plate 11B and abuts against the lower end face of the upper yoke 32, and the lower end face of the first side plate 11A protrudes outward from the second side plate 11B and abuts against the upper end face of the lower yoke 33. Heat dissipation gaps are formed between the upper end face of the second side plate 11B and the upper yoke 32, and between the lower end face of the second side plate 11B and the lower yoke 33. Specifically, the upper end face of the first side plate 11A protrudes outward from the second side plate 11B, and the lower end face of the first side plate 11A protrudes outward from the second side plate 11B, so that during the assembly of the core 3, the upper yoke 32 simultaneously abuts against the upper end faces of the first side plates 11A of multiple frames 1, and the lower yoke 33 simultaneously abuts against the lower end faces of the first side plates 11A of multiple frames 1. The abutment of the upper yoke 32 and the lower yoke 33 is achieved solely through the first side plate 11A, eliminating the need for the gasket structure in the prior art. Furthermore, heat dissipation gaps are formed between the upper end face of the second side plate 11B and the upper yoke 32, and between the lower end face of the second side plate 11B and the lower yoke 33, which further enhances the heat dissipation capacity of the winding 2. For example, multiple frames 1 are spaced apart along the first direction; in this embodiment, three frames 1 are provided.

[0060] In this embodiment, the end plate 12 is provided with a plurality of heat dissipation holes 122, which are arranged around the sleeve hole 121. Specifically, the arrangement of the heat dissipation holes 122 can form an effective heat dissipation channel, and the heat generated by the winding 2 itself can be effectively dissipated through the heat dissipation holes 122, thereby improving the effectiveness of heat dissipation of the winding 2. In addition, the insulation gap 201 between the upper end of the winding 2 and the upper yoke 32 and between the lower end of the winding 2 and the lower yoke 33 can also cooperate with the heat dissipation holes 122 to promote the flow of hot air and improve the heat dissipation effect.

[0061] In this embodiment, the end plate 12 is provided with a wire hole 123, and the connecting wire harness of the winding 2 passes through the wire hole 123 and is electrically connected to the terminal 41.

[0062] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A transformer, characterized in that, include: Skeleton (1); The winding (2) is sleeved on the frame (1); The iron core (3) includes a central column (31), an upper yoke (32) fixed to the upper end of the central column (31), and a lower yoke (33) fixed to the lower end of the central column (31). The central column (31) is correspondingly arranged with the skeleton (1), and the central column (31) passes through the corresponding skeleton (1). A terminal block (4) is fixed on the upper yoke (32). The terminal block (4) is provided with a terminal (41) that is electrically connected to the winding (2), and the terminal block (4) is provided with a creepage part for increasing the creepage distance of the terminal (41).

2. The transformer according to claim 1, characterized in that, The creepage section includes creepage grooves (42) and / or creepage holes formed on the terminal block (4).

3. The transformer according to claim 1, characterized in that, A bracket (5) is connected between the terminal block (4) and the upper yoke (32). The bracket (5) includes a fixing part (51) and a wiring part (52). One end of the fixing part (51) is connected to the upper yoke (32), and the other end of the fixing part (51) is connected to the wiring part (52) at an angle. The terminal block (4) is connected to the wiring part (52).

4. The transformer according to claim 3, characterized in that, Two terminals (4) are provided. The bracket (5) is provided in a one-to-one correspondence with the terminals (4). The two terminals (4) are distributed on opposite sides of the upper yoke (32). The first fastening bolt (61) passes through one of the fixing parts (51), the upper yoke (32), and the other fixing part (51) is threadedly connected to the first fastening nut (62).

5. The transformer according to claim 1, characterized in that, The frame (1) includes side plates (11) and end plates (12). The side plates (11) are provided with multiple side plates and are spliced ​​together end to end to form a winding part. The multiple side plates (11) together form a through hole (111). The end plates (12) are sleeved on both the upper and lower ends of the winding part. The winding (2) is sleeved on the winding part. The upper and lower ends of the winding (2) respectively abut against the end plates (12) at the corresponding ends. The central column (31) is disposed through the through hole (111) and the two end plates (12).

6. The transformer according to claim 5, characterized in that, Among the two adjacent side plates (11), one of them has a splicing end with a plug groove (1101), and the other has a splicing end with a plug connector (1102). The splicing ends of the two side plates (11) are spliced ​​together, and the plug connector (1102) is inserted into the plug groove (1101).

7. The transformer according to claim 5, characterized in that, The side plate (11) is provided in four parts, of which two side plates (11) are first side plates (11A) and the other two side plates (11) are second side plates (11B). The two first side plates (11A) are spaced apart along a first direction and the two second side plates (11B) are spaced apart along a second direction. The two first side plates (11A) and the two second side plates (11B) are spliced ​​together to form a rectangular winding part. The end plate (12) is provided with a rectangular sleeve hole (121). The end plate (12) is sleeved on the winding part through the sleeve hole (121).

8. The transformer according to claim 7, characterized in that, The first side plate (11A) is provided with a limiting head (1103) at both the upper and lower ends. The limiting head (1103) protrudes from the first side plate (11A) along the second direction. The second side plate (11B) is provided with a corresponding clearance groove (1104). The limiting head (1103) passes through the clearance groove (1104) along the second direction. The limiting head (1103) passes through the sleeve hole (121) and abuts against the side of the end plate (12) facing away from the winding (2).

9. The transformer according to claim 1, characterized in that, An insulating gap (201) is formed between the upper end of the winding (2) and the upper yoke (32) and between the lower end of the winding (2) and the lower yoke (33).

10. The transformer according to claim 7, characterized in that, The upper end face of the first side plate (11A) protrudes outward from the second side plate (11B) and is used to abut against the lower end face of the upper yoke (32). The lower end face of the first side plate (11A) protrudes outward from the second side plate (11B) and is used to abut against the upper end face of the lower yoke (33). Heat dissipation gaps are formed between the upper end face of the second side plate (11B) and the upper yoke (32) and between the lower end face of the second side plate (11B) and the lower yoke (33).

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