Transformer structure
By improving the isolation part structure, the output terminal is arranged at the bottom of the isolation part and directly connected to the transformer coil, which solves the problem of insufficient creepage distance of the traditional transformer and improves the safety and production efficiency of the transformer.
Patent Information
- Application Number
- CN202421840587.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-07-31
AI Technical Summary
The creepage distance between the output terminal and the core of the traditional epoxy cast transformer is insufficient, which cannot meet the high voltage withstand requirements, affecting the reliability and safety of the transformer.
By improving the structure of the isolation part, the output terminal is arranged at the bottom of the isolation part and is directly connected to the transformer coil, thereby increasing the creepage distance between the output terminal and the iron core.
When the other dimensions of the transformer body remain unchanged, the creepage distance is effectively increased, the risk of short circuit is reduced, the safety of the transformer is improved, the production cost is reduced, and the production efficiency is improved.
Smart Images
Figure CN222851252U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electronic components, and in particular relates to a transformer structure. Background Art
[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. As an important power equipment in the power system, its performance directly affects the stable operation and safety of the power system.
[0003] Epoxy resin cast transformers have been widely used in various power systems due to their excellent insulation properties and mechanical strength. According to relevant standards, when designing epoxy cast transformers, the withstand voltage between the output terminal and the core must be DC40kV, the leakage current must be ≤50μA, and there must be no sparking, lightning, arcing, etc. for 10 minutes. When designing traditional epoxy cast transformers, cylindrical protrusions are usually set on the side walls of the coil, and the output terminal is fixed on the top of the protrusion. However, this installation method is prone to fail to meet the high withstand voltage requirements due to the creepage distance between the transformer output terminal and the core not meeting the requirements, which in turn leads to withstand voltage failure, affecting the reliability and safety of the transformer.
[0004] In order to increase the creepage distance between the output terminal and the iron core, there are some designs in the prior art, but the method adopted in the prior art is usually to improve the structure of the transformer body or the terminal. Although this improvement method can meet the requirements of relevant standards, it not only increases the production cost of the transformer product, but also, due to the complex structure after improvement, it is not conducive to the efficient production of the transformer product. Utility Model Content
[0005] The purpose of the utility model is to solve one of the above technical problems and provide a transformer structure.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0007] A transformer structure, characterized by comprising:
[0008] The transformer body includes a transformer coil, a first iron core block and a second iron core block. The first iron core block and the second iron core block are respectively arranged at two ends of the transformer coil;
[0009] The isolating part comprises at least two isolating parts, and the at least two isolating parts are arranged on one side of the transformer coil; the isolating part is a tubular structure, and one end of the isolating part is connected to the side wall of the transformer coil;
[0010] The number of output terminals matches the number of isolation parts and is respectively arranged inside each isolation part; the output terminals include a terminal post, one end of which is connected to the side wall of the transformer coil; the length of the terminal post is less than the length of the isolation part.
[0011] In some embodiments of the utility model, an input terminal is further included, and the input terminal is arranged at one end of the first core block or the second core block in the length direction.
[0012] In some embodiments of the present invention, the isolation portion is a circular tubular structure and is coaxially arranged with the terminal.
[0013] In some embodiments of the utility model, the transformer body is a three-phase transformer, one side of each transformer coil is connected to two isolation parts and two output terminals, and the isolation parts and output terminals connected to each transformer coil are located on the same side of the transformer body.
[0014] In some embodiments of the present invention, the output terminal further comprises a terminal nut, a threaded section is provided on the outer wall of the terminal post, and the terminal nut is connected to the terminal post through the threaded section.
[0015] In some embodiments of the present invention, core clamps are provided on both sides of the first core block and the second core block in the width direction, and the core clamps extend along the length direction of the first core block and the second core block.
[0016] In some embodiments of the present invention, the core clamps on the same side of the first core block and the second core block in the width direction are connected by a first connecting member.
[0017] In some embodiments of the present invention, both sides of the first core block and the core clamps on both sides of the first core block are connected by a second connecting member.
[0018] In some embodiments of the utility model, the first core block and / or the first connecting members on both sides of the first core block in the width direction are connected by a third connecting member.
[0019] In some embodiments of the utility model, lead wires are provided at both ends of the transformer coil in the length direction, and the lead wires at both ends extend to the connection terminals on the same side in the length direction respectively.
[0020] The beneficial effects of the utility model are:
[0021] 1. The utility model improves the structure of the isolation part and sets the output terminal at the bottom of the isolation part, which is directly connected to the transformer coil. When other dimensions of the transformer body remain unchanged, the creepage distance between the output terminal and the iron core is effectively increased, the risk of short circuit is reduced, and the safety of the transformer is improved;
[0022] 2. The improved isolation part in the utility model has a simple structure, and there is no need to change the structure of the transformer body and the output terminal, which reduces the production cost of the transformer product and is conducive to improving the production efficiency of the transformer product. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the specific embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0024] Figure 1 A schematic diagram of the structure of the transformer provided by the present invention;
[0025] Figure 2 A front structural schematic diagram of a transformer structure provided by the present invention;
[0026] Figure 3 A schematic diagram of the side structure of the transformer provided by the present invention;
[0027] Figure 4 A schematic diagram of creepage distance of a transformer structure in the prior art;
[0028] Figure 5 A schematic diagram of creepage distance of a transformer structure provided by the present invention;
[0029] Wherein, the accompanying drawings are marked as follows:
[0030] 1. Transformer body; 11. Transformer coil; 12. First core block; 13. Second core block; 2. Isolation part; 3. Output terminal; 4. Input terminal; 5. Core clamp; 6. First connecting piece; 7. Second connecting piece; 8. Third connecting piece. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.
[0032] Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can be applied to other similar scenarios based on these drawings without any creative work.
[0033] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features.
[0034] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the usual meanings understood by persons with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a kind" and the like involved in this application do not indicate a quantitative limitation and may indicate the singular or plural. The terms "include", "comprises", "has" and any variations thereof involved in this application are intended to cover non-exclusive inclusions.
[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0036] The technical solution of the utility model is described in detail below in conjunction with specific embodiments and the accompanying drawings.
[0037] As attached Figure 1 -Attached Figure 5 As shown, in an illustrative embodiment of a transformer structure of the present invention, the transformer structure includes a transformer body 1 , an isolation part 2 and an output terminal 3 .
[0038] The transformer body 1 includes a transformer coil 11, a first core block 12 and a second core block 13. The transformer coil 11 is integrally cast with epoxy resin, the first core block 12 and the second core block 13 are respectively arranged at both ends of the length direction of the transformer coil 11, a magnetic column is arranged between the first core block 12 and the second core block 13, and the transformer coil 11 is wound on the magnetic column. Lead wires are arranged at both ends of the length direction of the transformer coil 11.
[0039] The isolating part 2 is made of insulating material and includes two isolating parts 2 arranged on one side of the transformer coil 11 along the length direction of the transformer body 1; the isolating part 2 is a tubular structure, one end of which is directly connected to the side wall of the transformer coil 11, and the other end extends away from the transformer body 1. In this embodiment, the isolating part 2 is a circular tubular structure, which is coaxially arranged with the terminal, and the isolating part 2 and the epoxy-cast transformer coil 11 are an integrally formed structure.
[0040] The output terminals 3 include two, and the two output terminals 3 are respectively arranged inside the two isolation parts 2; the output terminals 3 include a terminal for connecting the lead wire of the transformer coil 11, one end of the terminal is directly connected to the side wall of the transformer coil 11, and the other end extends in a direction away from the transformer body 1, and an annular gap is formed between the side wall of the terminal and the inner wall of the isolation part 2. The lead wires at both ends of the transformer coil 11 extend to the terminals on the same side of the length direction thereof.
[0041] The length of the terminal post is smaller than the length of the isolating portion 2 , that is, the end face of the terminal post away from the transformer body 1 is located inside the end face of the tubular isolating portion 2 away from the transformer body 1 .
[0042] As attached Figure 4 As shown, in the prior art, a cylindrical protrusion is usually provided on the side wall of the coil, and the output terminal is fixed on the top of the protrusion. In the existing transformer structure, the creepage distance between the output terminal and the iron core is D1. The creepage distance D1 is as follows: Figure 4 Shown in the dotted line part.
[0043] In the present invention, the cylindrical protrusion is hollowed out to form a circular tubular isolating portion 2, and the output terminal 3 is arranged at the bottom of the isolating portion 2 and directly connected to the transformer coil 11, so that the creepage distance between the output terminal 3 and the iron core becomes D2. The creepage distance D2 is as shown in the attached figure. Figure 5 As shown in the dotted line, when other dimensions of the transformer body 1 remain unchanged, D2>D1, which effectively increases the creepage distance between the output terminal 3 and the iron core, reduces the risk of short circuit, and improves the safety of the transformer. At the same time, the improved isolation part 2 in the utility model has a simple structure, and there is no need to change the structure of the transformer body 1 and the output terminal 3, which reduces the production cost of the transformer product and is conducive to improving the production efficiency of the transformer product.
[0044] In order to make the connection of the transformer more convenient and to flexibly connect to the power supply, in some embodiments of the utility model, as shown in the attached Figure 1 -Attached Figure 3 As shown, it further includes an input terminal 4, which is arranged at one end of the first core block 12 or the second core block 13 in the length direction. In this embodiment, the input terminal 4 is arranged at one end of the first core block 12 in the length direction.
[0045] In some embodiments of the utility model, the transformer body 1 is a three-phase transformer, including three coils. One side of each transformer coil 11 is connected to two isolation parts 2 and two output terminals 3, and the isolation parts 2 and output terminals 3 connected to each transformer coil 11 are located on the same side of the transformer body 1.
[0046] In order to achieve the connection between the coil and the terminal, in some embodiments of the present invention, the output terminal 3 further includes a terminal nut, and a threaded section is provided on the outer wall of the terminal, and the terminal nut is movably connected to the terminal through the threaded section.
[0047] In order to facilitate the installation or hoisting of the transformer body 1 and enhance the stability of the transformer structure, in some embodiments of the utility model, as shown in the attached Figure 1 -Attached Figure 3 As shown, core clamps 5 are provided on both sides of the width direction of the first core block 12 and the second core block 13 to clamp and fix the first core block 12 and the second core block 13. The core clamps 5 extend along the length direction of the first core block 12 and the second core block 13. It should be noted that the shapes of the core clamps 5 on both sides of the first core block 12 and the core clamps 5 on both sides of the second core block 13 can be the same or different. In the present embodiment, the core clamps 5 on both sides of the first core block 12 are strip clamps, and the core clamps 5 on both sides of the second core block 13 are L-shaped clamps.
[0048] In order to further enhance the stability of the transformer structure, in some embodiments of the present invention, the core clamps 5 on the same side of the first core block 12 and the second core block 13 in the width direction are connected by a first connecting member 6 .
[0049] In order to further enhance the stability of the transformer structure, in some embodiments of the present invention, both sides of the first core block 12 and the core clamps 5 on both sides of the first core block 12 are connected by a second connecting member 7 .
[0050] In order to further enhance the stability of the transformer structure, in some embodiments of the utility model, the first core block 12 and / or the first connecting members 6 on both sides of the width direction of the first core block 12 are connected by a third connecting member 8. The third connecting member 8 is U-shaped, extending along the width direction of the transformer body 1, and is fixedly connected to the first core block 12 and / or the core clamps 5 on both sides of the width direction of the first core block 12.
[0051] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0052] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for which protection is requested in the utility model.
Claims
1. A transformer structure, characterized in that: include: A transformer body, comprising a transformer coil, a first core block and a second core block, wherein the first core block and the second core block are respectively arranged at two ends of the transformer coil; The isolating part comprises at least two isolating parts, and the at least two isolating parts are arranged on one side of the transformer coil; the isolating part is a tubular structure, and one end of the isolating part is connected to the side wall of the transformer coil; The number of output terminals matches the number of the isolation parts and is respectively arranged inside each isolation part; the output terminals include a terminal post, one end of which is connected to the side wall of the transformer coil; the length of the terminal post is less than the length of the isolation part.
2. The transformer structure according to claim 1, characterized in that: It further includes an input terminal, which is arranged at one end of the first core block or the second core block in the length direction.
3. The transformer structure according to claim 1, characterized in that: The isolation part is a circular tubular structure and is coaxially arranged with the terminal.
4. The transformer structure according to claim 1, characterized in that: The transformer body is a three-phase transformer, one side of each transformer coil is connected to two isolation parts and two output terminals, and the isolation parts and output terminals connected to each transformer coil are located on the same side of the transformer body.
5. The transformer structure according to claim 1, characterized in that: The output terminal further comprises a terminal nut, a threaded section is arranged on the outer wall of the terminal, and the terminal nut is connected to the terminal through the threaded section.
6. The transformer structure according to claim 1, characterized in that: Core clamps are provided on both sides of the first core block and the second core block in the width direction, and the core clamps extend along the length direction of the first core block and the second core block.
7. The transformer structure according to claim 6, characterized in that: The core clamps on the same side of the first core block and the second core block in the width direction are connected by a first connecting member.
8. The transformer structure according to claim 6 or 7, characterized in that: Both sides of the first core block and the core clamps on both sides of the first core block are connected via a second connecting member.
9. The transformer structure according to claim 7, characterized in that: The first core block and / or the first connecting members on both sides of the first core block in the width direction are connected by a third connecting member, and the third connecting member is connected to the core clamp.
10. The transformer structure according to claim 1, characterized in that: Lead wires are arranged at both ends of the transformer coil in the length direction, and the lead wires at both ends extend to the connection terminals on the same side in the length direction respectively.