High-voltage transformer structure

Abstract

The utility model relates to the technical field of transformers, in particular to a high-voltage transformer structure which comprises an iron core (1). The iron core (1) is connected with a secondary winding (2); the secondary winding (2) is connected with a primary winding (3); the primary winding and the secondary winding are wound on different frameworks, a traditional winding mode is changed, and the relative distance between the secondary winding and the primary winding is structurally increased; and compared with an original pouring structure, the device has the advantages that the product weight is greatly reduced, and the application range of the high-voltage transformer can be widened.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, and in particular to a high-voltage transformer structure. Background Art

[0002] High-voltage transformer is a transformer that converts low voltage into high voltage through the principle of electromagnetic induction. It consists of an iron core and primary and secondary windings. Since the input voltage needs to be converted into a very high voltage, insulation is particularly important during the production process. Therefore, to solve this problem, the existing production technology is mostly epoxy resin injection. During the production process, the corresponding injection mold needs to be designed according to the product's appearance and dimensions, and then the primary and secondary lead wires are insulated. Finally, the iron core and primary and secondary windings are integrally injected and molded. Epoxy resin can be cured under certain temperature and time conditions by adding curing agent and modifier. After curing, it has excellent electrical insulation properties, so it is widely used in the production process.

[0003] Although epoxy resin has good electrical insulation properties and can ensure that high-voltage transformers maintain good stability during operation, the production process is complex and time-consuming; a dedicated injection mold must be designed according to the appearance characteristics of each product, which is not universal and time-consuming; EPGC201 is an epoxy glass cloth laminate; it has excellent electrical and mechanical properties and is suitable for electrical insulation structural parts;

[0004] After searching, the applicant found that the Chinese patent document with publication number 207572213U disclosed on July 3, 2018 a high-voltage coil for a dry-type transformer, which consists of a first coil segment and a second coil segment; wherein the first coil segment and the second coil segment are wound in the same direction; the first coil segment and the second coil segment are connected to each other and arranged along the axial direction of the iron core of the dry-type transformer; a glass grid impregnated with a mixed castable is provided between each layer of the first coil segment and the second coil segment, and the mixed castable fills the gaps between each layer.

[0005] The device cannot ensure the voltage withstand performance and stability of the high-voltage transformer while enhancing its versatility. Utility Model Content

[0006] The utility model aims to provide a high-voltage transformer structure which can ensure the withstand voltage performance and stability of the high-voltage transformer and enhance its versatility.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is: a high-voltage transformer structure, including an iron core; a secondary winding is connected to the iron core; and the secondary winding is connected to the primary winding.

[0008] The iron core comprises a first mounting groove and a second mounting groove; a core column is arranged between the first mounting groove and the second mounting groove; and the secondary winding is sleeved on the core column.

[0009] The primary winding is arranged on a side of the secondary winding away from the core column; the primary winding is arranged in the first installation groove and the second installation groove respectively.

[0010] A spacer is provided between the primary winding and the secondary winding.

[0011] The spacers are bonded to the primary winding and the secondary winding respectively.

[0012] The iron core includes a first iron core and a second iron core; the core column includes a first core column and a second core column; the first iron core includes the first core column and the first mounting groove; the second iron core includes the second core column and the second mounting groove; the first core column and the second core column are both sleeved in the secondary winding.

[0013] A packing buckle is arranged on the top of the iron core; a steel belt is arranged in the packing buckle.

[0014] A base is provided at the bottom of the iron core; and bolt holes are provided on the base.

[0015] The secondary winding includes a first frame; the primary winding includes a second frame; the first frame and the second frame are both EPGC201 boards.

[0016] The cushion block is an I-shaped structure; the cushion block is a polyetherimide block.

[0017] The beneficial effects of this application are:

[0018] A high-voltage transformer structure comprises an iron core; a secondary winding is connected to the iron core; and the secondary winding is connected to a primary winding.

[0019] The structure of the high-voltage transformer is to space the primary winding and the secondary group apart by winding the primary winding and the secondary group on different frames; the first frame and the second frame of the epoxy glass cloth laminate of EPGC201 insulation material and the spacer of the polyetherimide board are selected to ensure that the structure of the high-voltage transformer has good voltage resistance and stability, so that it can meet the working requirements of the high-voltage environment;

[0020] The high-voltage transformer structure can replace the original epoxy injection structure, reducing the original process flow; it is no longer necessary to design corresponding injection molds according to different products, reducing production costs and improving product production efficiency; due to the particularity of the structure and material selection of this device, it can still maintain good stability in harsh environments, and compared with the original injection structure, the product weight is greatly reduced, which can broaden the scope of use of high-voltage transformers. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings, wherein:

[0022] Figure 1 This is a schematic diagram of the structure of the high-voltage transformer.

[0023] Figure 2 This is a top view of the high-voltage transformer structure.

[0024] Figure 3 This is a schematic diagram of the structure of the gasket of the high-voltage transformer structure.

[0025] The marks in the above figure are:

[0026] The markings in the figure are:

[0027] 1. iron core, 101. first iron core, 102. second iron core,

[0028] 2. Secondary winding,

[0029] 3. Primary winding,

[0030] 4. The first installation slot,

[0031] 5. Second installation slot,

[0032] 6. Core column, 601, first core column, 602, second core column,

[0033] 7. Base, 701, bolt hole,

[0034] 8. Packing buckle,

[0035] 9. Pad. DETAILED DESCRIPTION

[0036] The following is a further detailed explanation of the specific implementation methods of the utility model through the description of the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the utility model and facilitating its implementation.

[0037] Figure 1A high-voltage transformer structure is shown, comprising an iron core 1; a secondary winding 2 is connected to the iron core 1; and a primary winding 3 is connected to the secondary winding 2. By winding the primary winding 3 and the secondary winding 2 on different frames, the traditional winding method is changed, and the relative distance between the secondary winding 2 and the primary winding 3 is increased in structure; the device has good voltage resistance and stability, and the product weight is greatly reduced compared to the original infusion structure, which can broaden the scope of use of the high-voltage transformer.

[0038] The iron core 1 includes a first mounting groove 4 and a second mounting groove 5; a core column 6 is provided between the first mounting groove 4 and the second mounting groove 5; and the secondary winding 2 is sleeved on the core column 6. The iron core 1 is made of wound silicon steel strip material, which can provide high saturation magnetic flux density and have quite satisfactory magnetic permeability at high magnetic flux density; the core column 6 is provided in the middle of the iron core 1; the first mounting groove 4 and the second mounting groove 5 are provided on both sides of the iron core 1; the secondary winding 2 is sleeved on the core column 6 and passes through the first mounting groove 4 and the second mounting groove 5 respectively.

[0039] The primary winding 3 is arranged on the side of the secondary winding 2 away from the core column 6; the primary winding 3 is respectively arranged in the first mounting groove 4 and the second mounting groove 5. The primary winding 3 is sleeved on the outside of the secondary winding 2 and passes through the first mounting groove 4 and the second mounting groove 5 respectively, and the primary winding 3 and the secondary winding 2 are respectively wound on different frames, thereby increasing the distance in space.

[0040] A spacer 9 is provided between the primary winding 3 and the secondary winding 2. The spacer 9 is provided on the inner wall of the primary winding 3 in four directions and is fixedly connected to the primary winding 3 and the secondary winding 2 respectively; the primary winding 3 can be stably fixed on the secondary winding 2, and the primary winding 3 can be stably supported, and the gap between the primary winding 3 and the secondary winding 2 can be maintained.

[0041] The spacer 9 is bonded to the primary winding 3 and the secondary winding 2. A cold curing adhesive is applied between the spacer 9 and the outer wall of the secondary winding 2 and the inner wall of the primary winding 3, which can ensure that the primary winding 3 is firmly bonded to the secondary winding 2 to avoid falling off.

[0042] The iron core 1 includes a first iron core 101 and a second iron core 102; the core column 6 includes a first core column 601 and a second core column 602; the first iron core 101 includes a first core column 601 and a first mounting groove 4; the second iron core 102 includes a second core column 602 and a second mounting groove 5; the first core column 601 and the second core column 602 are both sleeved in the secondary winding 2. The first iron core 101 and the second iron core 102 have the same structure; the first iron core 101 and the second iron core 102 are placed side by side; the first core column 601 and the second iron core 102 are adjacent; so that the secondary winding 2 can be sleeved outside the first core column 601 and the second iron core 102.

[0043] The top of the iron core 1 is provided with a packing buckle 8; a steel belt is provided in the packing buckle 8. The packing buckle 8 is fixedly connected to the top of the iron core 1; a fixing groove is provided on the packing buckle 8; a steel belt is connected in the fixing groove; the steel belt extends along the side of the iron core 1 to the bottom of the base 7; and then the first part is welded; thus, the iron core 1, the primary winding 3, the secondary winding 2 and the base 7 can be combined into a stable whole in the form of packing.

[0044] The bottom of the core 1 is provided with a base 7, and the base 7 is provided with bolt holes 701. The base 7 is an I-shaped plate, and the four corners of the base 7 are provided with bolt holes 701, which can be matched with bolts in the bolt holes 701 to achieve the fixing of the device at the installation position.

[0045] The secondary winding 2 includes a first frame; the primary winding includes a second frame; the first frame and the second frame are both EPGC201 boards. The first frame and the second frame use special epoxy board EPGC201; EPGC201 insulation material epoxy glass cloth laminate is made of electrical alkali-free glass fiber impregnated with epoxy resin and hot pressed; it has good dielectric properties and is very stable in high temperature environments, and is suitable for use as insulation structural parts in F-class motors and electrical equipment.

[0046] The pad 9 is an I-shaped structure; the pad 9 is a polyetherimide block. The pad 9 serves as a fixing and supporting structure between the primary winding 3 and the secondary winding 2, and as a bridge between the primary winding 3 and the secondary winding 2, and has good dimensional stability and dielectric properties; the pad 9 is a polyetherimide block, which is an amorphous high-performance polymer. The polyetherimide block is an engineering plastic made of amorphous polyetherimide and is molded at high temperature; it has the best high temperature resistance and dimensional stability, as well as chemical resistance, flame retardancy, high strength, and high rigidity; it can ensure that the device maintains excellent stability in harsh working environments.

[0047] The specific working process of the utility model is as follows:

[0048] According to the production requirements, the primary winding 3 and the secondary winding 2 are wound; then the special process of impregnation and end sealing is performed to insulate the primary and secondary windings; the secondary winding 2 is sleeved inside the primary winding 3, and supported and fastened in four directions by the pads 9; an appropriate amount of cold-curing adhesive should be applied to the surface of the pads 9 so that it is tightly glued to the primary and secondary windings and does not fall off; the iron core 1 is inserted into the secondary winding 2, and fastened by the packing buckle 8 and the base 7;

[0049] This structure and assembly method spatially increase the relative distance between the lead wires of the primary winding 3 and the secondary winding 2, so that the transformer can maintain good stability in a high-voltage working environment without epoxy resin injection; the selection of EPGC201 epoxy glass cloth laminate and polyetherimide board ensures that the high-voltage transformer can maintain good working performance in harsh working environments, such as salt spray, temperature and humidity; tests have found that this transformer structure can achieve an AC 40kV compressive strength level in an air environment.

[0050] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model; or the above concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A high voltage transformer structure, characterized in that: It comprises an iron core (1); a secondary winding (2) is connected to the iron core (1); and the secondary winding (2) is connected to a primary winding (3).

2. A high voltage transformer structure according to claim 1, characterized in that: The iron core (1) comprises a first mounting groove (4) and a second mounting groove (5); a core column (6) is provided between the first mounting groove (4) and the second mounting groove (5); and the secondary winding (2) is sleeved on the core column (6).

3. A high voltage transformer structure according to claim 2, characterized in that: The primary winding (3) is arranged on a side of the secondary winding (2) away from the core column (6); the primary winding (3) is arranged in the first installation groove (4) and the second installation groove (5) respectively.

4. A high voltage transformer structure according to claim 3, characterized in that: A spacer (9) is provided between the primary winding (3) and the secondary winding (2).

5. A high voltage transformer structure according to claim 4, characterized in that: The spacer (9) is bonded to the primary winding (3) and the secondary winding (2) respectively.

6. A high voltage transformer structure according to any one of claims 4 to 5, characterized in that: The iron core (1) comprises a first iron core (101) and a second iron core (102); the core column (6) comprises a first core column (601) and a second core column (602); the first iron core (101) comprises the first core column (601) and the first mounting groove (4); the second iron core (102) comprises the second core column (602) and the second mounting groove (5); the first core column (601) and the second core column (602) are both sleeved in the secondary winding (2).

7. A high voltage transformer structure according to claim 6, characterized in that: A packing buckle (8) is provided on the top of the iron core (1); a steel belt is provided in the packing buckle (8).

8. A high voltage transformer structure according to claim 7, characterized in that: A base (7) is provided at the bottom of the iron core (1); and a bolt hole (701) is provided on the base (7).

9. A high voltage transformer structure according to claim 8, characterized in that: The secondary winding (2) comprises a first frame; the primary winding (3) comprises a second frame; the first frame and the second frame are both EPGC201 boards.

10. A high voltage transformer structure according to any one of claims 7 to 9, characterized in that: The cushion block (9) is an I-shaped structure; the cushion block (9) is a polyetherimide block.

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