High-frequency and high-voltage transformer and manufacturing method

Abstract

The invention discloses a high-frequency and high-voltage transformer and a manufacturing method, and relates to the technical field of transformers. The high-frequency and high-voltage transformer comprises a magnetic core which comprises a first winding area and a second winding area; the first composite winding is wound in the first winding area, and the first composite winding sequentially comprises a first winding, a second winding, a third winding and a fourth winding from inside to outside; the second composite winding is wound in the second winding area and sequentially comprises a fifth winding, a sixth winding, a seventh winding and an eighth winding from inside to outside; wherein the first winding is connected with the eighth winding, the second winding is connected with the seventh winding, the third winding is connected with the sixth winding, and the fourth winding is connected with the fifth winding. The winding sequence of the windings from inside to outside is reversed on the primary coil and the secondary coil, so that gaps between layers of the transformer are enlarged, and the storage amount of charges is reduced under the condition that the transformer is high in voltage.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a high-frequency and high-voltage transformer and a manufacturing method thereof. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, the secondary coil, and the iron core (magnetic core). In electrical equipment and wireless circuits, it is often used to increase or decrease voltage, match impedance, and provide safety isolation. In a generator, whether the coil moves through a magnetic field or the magnetic field moves through a fixed coil, an electric potential can be induced in the coil. In both cases, the value of the magnetic flux remains unchanged, but the amount of magnetic flux interlinked with the coil changes. This is the principle of mutual induction. A transformer is a device that uses electromagnetic mutual induction to transform voltage, current, and impedance.

[0003] At present, high-frequency and high-voltage transformers are a key electromagnetic component, mainly used in high-voltage and high-power electric energy conversion situations, especially in modern power electronic equipment such as switching power supplies, inverters, and frequency converters. They occupy a core position. High-voltage and high-frequency transformers are high-power (greater than 10kW), high-voltage (greater than 10kV), and high-frequency (greater than 10kHz) AC-DC power converters. The significance of high frequency is to increase the power of the transformer while reducing its size and electromagnetic interference. However, when the power system is out of power, there may still be residual charge on the high-voltage side of the transformer. This is because capacitors, inductors and other components in the power system may continue to store charge after the power outage. These charges may form residual voltage on the high-voltage side of the transformer. If the transformer is in a charge storage state for a long time, it will cause the transformer to burn out, thereby affecting the service life of the transformer. Summary of the invention

[0004] In view of the defects existing in the prior art, the technical problem solved by the present invention is: how to reduce the storage amount of electric charge in the transformer under high voltage condition.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a high-frequency high-voltage transformer, comprising: A magnetic core comprising a first winding area and a second winding area, wherein a spacer area is provided between the first winding area and the second winding area; A first composite winding, which is wound in the first winding area, one end of which is provided with a first high-voltage lead, and the first composite winding includes a first winding, a second winding, a third winding and a fourth winding from the inside to the outside; A second composite winding, which is wound in the second winding area, and a second high-voltage lead is provided at one end of the second composite winding, and the second composite winding includes a fifth winding, a sixth winding, a seventh winding and an eighth winding from the inside to the outside in sequence; Among them, the first winding is connected to the eighth winding, the second winding is connected to the seventh winding, the third winding is connected to the sixth winding, and the fourth winding is connected to the fifth winding.

[0006] By adopting the above technical solution, the magnetic core is divided into a first winding area and a second winding area, the first composite winding is wound as a primary coil in the first winding area, the second composite winding is wound as a secondary coil in the second winding area, and the first composite winding is wound first, and the first winding, the second winding, the third winding and the fourth winding are wound in sequence from the inside to the outside. The wires of the second composite winding are reserved after the first composite winding is wound, that is, four wires are reserved. After the first composite winding is completely wound, the second composite winding is wound, and the reserved wires of the fourth winding are wound first to form the fifth winding, and then the reserved wires of the third winding are wound to form the sixth winding. By analogy, the windings of the second winding area are the fifth winding, the sixth winding, the seventh winding and the eighth winding from the inside to the outside. Therefore, the above winding design enlarges the gap between the transformer layers. When the gap between the layers is larger, the amount of stored charge is less, so that the transformer can reduce the amount of charge stored under high voltage conditions and increase the service life of the transformer.

[0007] In combination with the first aspect, in one embodiment, a multi-layer composite insulation layer group is laid between the magnetic core and the first composite winding and between the magnetic core and the second composite winding, and the composite insulation layer group is sleeved on the magnetic core, and the composite insulation layer group includes multiple layers of composite insulation paper from the inside to the outside.

[0008] By adopting the above technical solution, the composite insulation layer group is a continuous insulation layer, which covers the entire first winding area, the second winding area and the spacing area. A multi-layer composite insulation layer group is sleeved on the magnetic core, and the composite insulation layer group is composed of multiple layers of composite insulation paper to ensure the insulation effect between the magnetic core and the winding under high voltage conditions.

[0009] In one embodiment, the composite insulating layer group is sleeved on the magnetic core in a stepped manner, and the length of the innermost composite insulating layer group is greater than the length of the outermost composite insulating layer group.

[0010] By adopting the above technical solution, the multi-layer composite insulation layer is made into a stepped type, which not only increases the creepage distance, but also allows the epoxy resin glue to be fully filled during the later glue pouring, thereby further improving the insulation effect between the magnetic core and the winding.

[0011] In one embodiment, the composite insulating paper includes a PI film and a PTFE film, and the PI film and the PTFE film are laminated.

[0012] By adopting the above technical solution, when there is only PI film, too many layers will lead to misalignment, and when there is only PTFE film, the PTFE film is easy to rupture. Therefore, the two are overlapped to form a composite insulating paper, thereby solving the process problem.

[0013] In one embodiment, the magnetic core is multiple, including several U-shaped magnetic cores and one strip-shaped magnetic core.

[0014] By adopting the above technical solution, the high-frequency and high-voltage transformer requires a larger power, so a larger magnetic core is required, but the magnetic core material is difficult to form in one go, so the magnetic core is designed to be assembled in multiple pieces to meet the power requirement.

[0015] In one embodiment, a clearance groove is circumferentially opened on the outer wall of the magnetic core, a water cooling circulation pipeline is installed in the clearance groove, and the water cooling circulation pipelines on two adjacent magnetic cores are connected by a connecting pipe.

[0016] By adopting the above technical solution, the water-cooling circulation pipeline is stuck inside the give way groove, which is convenient for the surrounding installation of the water-cooling circulation pipeline, and the contact area between the water-cooling circulation pipeline and the magnetic core is increased, thereby improving the heat dissipation effect of the transformer. At the same time, because the water-cooling circulation pipeline is located inside the give way groove, when the winding is installed on the magnetic core, the contact between the water-cooling circulation pipeline and the winding is reduced, thereby avoiding crushing the water-cooling circulation pipeline. If there are multiple magnetic cores, connecting pipes need to be provided between the water-cooling circulation pipelines on adjacent magnetic cores, so that the coolant can flow from the water-cooling circulation pipeline of one group of magnetic cores to the water-cooling circulation pipeline of another group of magnetic cores, thereby achieving the effect of heat dissipation for all magnetic cores.

[0017] In one embodiment, one of the water-cooling circulation pipelines on the two outermost magnetic cores is provided with a water inlet pipeline, and the other water-cooling circulation pipeline is provided with a water outlet pipeline.

[0018] By adopting the above technical solution, the coolant flows in through the water inlet pipe and flows out through the water outlet pipe, thereby completing a cycle. In addition, this design only requires the installation of one water inlet pipe and one water outlet pipe to achieve the function of heat dissipation for all magnetic cores, thereby reducing the space occupied by the water inlet pipe and the water outlet pipe inside the transformer.

[0019] In one embodiment, NOMEX paper is disposed between two adjacent windings in the first composite winding, and NOMEX paper is disposed between two adjacent windings in the second composite winding.

[0020] By adopting the above technical solution, the insulation effect between different windings is improved to avoid significant mutual influence.

[0021] In a second aspect, the present invention provides a method for manufacturing a high-frequency high-voltage transformer, which comprises the following steps: Install a water cooling circulation system on the magnetic core; The multi-layer composite insulating layer group is mounted on the magnetic core in a stepped manner, wherein the length of the composite insulating layer group is shortened from the inside to the outside; The first winding, the second winding, the third winding and the fourth winding are sequentially wound in the first winding area of ​​the magnetic core from the inside to the outside, and the wires for winding are reserved in the second winding area; Firstly, the wires reserved for the fourth winding are wound around the second winding area of ​​the magnetic core, and then the wires reserved for the third winding are wound around the periphery of the fourth winding, and then the wires reserved for the second winding are wound around the periphery of the third winding, and finally the wires reserved for the first winding are wound around the periphery of the second winding; Installing a first high-voltage lead wire at an end of the first composite winding, and installing a second high-voltage lead wire at an end of the second composite winding; Install other structures, including copper plates, guard plates, bolt assemblies, copper foils and shielding covers; Glue is poured through the glue pouring tooling template to form a high-frequency and high-voltage transformer.

[0022] By adopting the above technical solution, the magnetic core is divided into a first winding area and a second winding area, the first composite winding is wound as a primary coil in the first winding area, the second composite winding is wound as a secondary coil in the second winding area, and the first composite winding is wound first, and the first winding, the second winding, the third winding and the fourth winding are wound in sequence from the inside to the outside. The wires of the second composite winding are reserved after the first composite winding is wound, that is, four wires are reserved. After the first composite winding is completely wound, the second composite winding is wound, and the reserved wires of the fourth winding are wound first to form the fifth winding, and then the reserved wires of the third winding are wound to form the sixth winding. By analogy, the windings of the second winding area are the fifth winding, the sixth winding, the seventh winding and the eighth winding from the inside to the outside. Therefore, the above winding design enlarges the gap between the transformer layers. When the gap between the layers is larger, the amount of stored charge is less, so that the transformer can reduce the amount of charge stored under high voltage conditions and increase the service life of the transformer.

[0023] In one embodiment, the glue pouring tooling template includes a tooling base, a tooling body and a tooling plate. The tooling body is arranged on the tooling base, the tooling base is used to support the end of the transformer, and the tooling plate is detachably mounted on the tooling body by screws. A plurality of holes are opened on the tooling plate, which are used for the first high-voltage lead and the second high-voltage lead to extend to the outside of the glue pouring tooling template.

[0024] By adopting the above technical solution, the tooling base supports the end of the transformer, and because the tooling plate is detachably mounted on the tooling body by screw pins, it is convenient to place the transformer into the tooling body. When installing the tooling plate, it is necessary to align the holes on the tooling plate with the first high-voltage lead and the second high-voltage lead so that the first high-voltage lead and the second high-voltage lead extend to the outside of the glue pouring tooling template to avoid affecting the first high-voltage lead and the second high-voltage lead during glue pouring.

[0025] In summary, the present invention includes at least one of the following beneficial technical effects: 1. By reversing the winding order from inside to outside on the primary coil and the secondary coil, the gap between the transformer layers is enlarged, so that the transformer can store less charge under high voltage and increase the service life of the transformer; 2. A stepped composite insulation layer group is set between the magnetic core and the winding, which not only increases the creepage distance, but also allows the epoxy resin glue to be fully filled during the later glue filling, thereby improving the insulation effect between the magnetic core and the winding; 3. By installing a water-cooling circulation pipeline in the concession groove on the magnetic core, not only the heat dissipation effect of the transformer is improved, but also the winding will not be affected, thereby further improving the service life of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a high-frequency and high-voltage transformer according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of a first composite winding and a second composite winding according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a water cooling circulation pipeline according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the epoxy resin adhesive layer according to an embodiment of the present invention; Figure 5 It is a schematic structural diagram of a glue-filling tooling template according to an embodiment of the present invention.

[0027] In the figure: 1-magnetic core, 2-composite insulation layer group, 3-first composite winding, 4-second composite winding, 5-first high-voltage lead, 6-second high-voltage lead, 7-water inlet pipe, 8-water outlet pipe, 9-allowance groove, 10-water cooling circulation pipeline, 11-connecting pipe, 12-epoxy resin glue layer, 13-tooling base, 14-tooling body, 15-tooling plate, 16-screw pin, 17-hole. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0029] The high frequency high voltage transformer in the embodiment of the present invention is shown in FIG. Figure 1 , 2 As shown, the high-frequency high-voltage transformer includes a magnetic core 1, which includes a first winding area and a second winding area, and a spacing area is arranged between the first winding area and the second winding area; a first composite winding 3 is wound on the first winding area, and a first high-voltage lead 5 is arranged at one end where the first composite winding 3 starts winding, and the first high-voltage lead 5 is used to supply power to the first composite winding 3 so that the magnetic core 1 generates an AC magnetic flux, and the first composite winding 3 includes a first winding, a second winding, a third winding and a fourth winding from the inside to the outside; a second composite winding 4 is wound on the second winding area, and the second composite winding 4 ends winding. A second high-voltage lead 6 is provided at one end, and the second high-voltage lead 6 is used to lead out the induced voltage generated by the second composite winding 4. The second composite winding 4 includes a fifth winding, a sixth winding, a seventh winding and an eighth winding from the inside to the outside; wherein, the first winding is connected to the eighth winding, the second winding is connected to the seventh winding, the third winding is connected to the sixth winding, and the fourth winding is connected to the fifth winding, that is, the first winding is connected to the eighth winding as the same wire, the second winding is connected to the seventh winding as the same wire, the third winding is connected to the sixth winding as the same wire, and the fourth winding is connected to the fifth winding as the same wire.

[0030] It can be seen that the present invention divides the magnetic core 1 into a first winding area and a second winding area, the first composite winding 3 is wound as a primary coil in the first winding area, and the second composite winding 4 is wound as a secondary coil in the second winding area, and the first composite winding 3 is wound first, and the first winding, the second winding, the third winding and the fourth winding are wound from the inside to the outside in sequence, and the wires of the second composite winding 4 are reserved after the first composite winding 3 is wound, that is, four wires are reserved, and after the first composite winding 3 is completely wound, the second composite winding 4 is wound. The second composite winding 4 is wound, and the fourth winding reserved wire is wound first to form the fifth winding, and then the third winding reserved wire is wound to form the sixth winding, and so on. The windings in the second winding area are the fifth winding, the sixth winding, the seventh winding and the eighth winding from the inside to the outside. Therefore, the above winding design enlarges the gap between the transformer layers. When the gap between the layers is larger, the amount of stored charge is less, thereby reducing the amount of charge stored in the transformer under high voltage conditions and increasing the service life of the transformer.

[0031] It should be noted that the calculation formula for transformer interlayer capacitance involves multiple parameters and may vary depending on the specific design and structure of the transformer. However, a commonly used estimation formula is based on the principle of parallel plate capacitors and can be expressed as: C = ε × A / d in: C is capacitance, measured in farads (F); ε is the dielectric constant, which is about 8.854 × 10^-12 F / m (farads per meter) for air or vacuum. If other materials are filled between the layers, the dielectric constant will be different; A is the area between the two parallel plates (in this case, the layers of the transformer) in square meters (m^2); d is the distance between the two parallel plates in meters (m).

[0032] For transformers, the calculation of interlayer capacitance may be more complicated because the layers may not be completely parallel and may be affected by winding structure, insulation material and other factors. Therefore, the above formula is mainly used to estimate or understand the basic principle of capacitance; in practical applications, in order to accurately calculate the interlayer capacitance of the transformer, more complex models or special measurements may be required; these models may include considerations such as the specific shape of the winding, the dielectric properties of the insulation material, and the actual distance between the layers.

[0033] In addition, for high-voltage and large-capacity transformers, interlayer capacitance may have a significant impact on the performance and stability of the transformer. Therefore, in the design and manufacturing process, the interlayer capacitance needs to be carefully considered and calculated to ensure the normal operation and safety of the transformer. In general, although the above formula provides a basic estimation method, in practical applications, more detailed and precise calculations may be required to accurately evaluate the interlayer capacitance of the transformer. However, it can be explained from the above formula that the storage capacitance between layers is inversely proportional to the interlayer spacing.

[0034] Preferably, a multi-layer composite insulation layer group 2 is laid between the magnetic core 1 and the first composite winding 3 and between the magnetic core 1 and the second composite winding 4, and the composite insulation layer group 2 is sleeved on the magnetic core 1, and the composite insulation layer group 2 includes multiple layers of composite insulation paper from the inside to the outside.

[0035] Specifically, the composite insulation layer group 2 is a continuous insulation layer, which covers the entire first winding area, the second winding area and the spacing area. A plurality of composite insulation layer groups 2 are sleeved on the magnetic core 1. The sizes of different composite insulation layer groups 2 can be the same or different. The composite insulation layer group 2 is composed of multiple layers of composite insulation paper to ensure the insulation effect between the magnetic core 1 and the winding under high voltage.

[0036] Furthermore, the composite insulating layer group 2 is arranged on the magnetic core 1 in a stepped manner, the length of the innermost composite insulating layer group 2 is greater than the length of the outermost composite insulating layer group 2, and the length of the outermost composite insulating layer group 2 at least completely covers the first winding area and the second winding area.

[0037] Specifically, the multi-layer composite insulation layer is made into a stepped type. At this time, the lengths between different composite insulation layers are different, which not only increases the creepage distance, but also allows the epoxy resin glue to be fully filled during the later glue pouring, thereby further improving the insulation effect between the magnetic core 1 and the winding; the composite insulation paper in the same group of composite insulation layers can also be laid in a stepped manner, thereby further improving the insulation effect between the magnetic core 1 and the winding.

[0038] Preferably, the composite insulating paper comprises a PI film (polyimide film) and a PTFE film (microporous film), and the PI film and the PTFE film are laminated.

[0039] Specifically, polyimide film (Polyimide Film) is the best performing film insulating material in the world. It is made of pyromellitic dianhydride (PMDA) and diaminodiphenyl ether (ODA) in a strong polar solvent through condensation and cast film formation and then imidization; PTFE membrane is a microporous film produced by special processes such as premixing, extrusion, calendering, and biaxial stretching using polytetrafluoroethylene dispersed resin. It is divided into clothing membrane, Puwei waterproof membrane, filtration membrane, and purification membrane; because when there is only PI membrane, too many layers will lead to misalignment, and when there is only PTFE membrane, the PTFE membrane is easy to rupture, so the two are superimposed to form a composite insulating paper to solve the process problem.

[0040] Preferably, there are multiple magnetic cores 1, including several U-shaped magnetic cores 1 and one strip-shaped magnetic core 1. The openings of the strip-shaped magnetic cores 1 and the U-shaped magnetic cores 1 are spliced, and the openings and closed ends between the U-shaped magnetic cores 1 and the U-shaped magnetic cores 1 are spliced. For example, when there are two magnetic cores 1, one U-shaped magnetic core 1 and one strip-shaped magnetic core 1 are required, and when there are three magnetic cores 1, two U-shaped magnetic cores 1 and one strip-shaped magnetic core 1 are required.

[0041] Specifically, the power required by the high-frequency and high-voltage transformer is relatively large, so the magnetic core 1 is required to be larger, but the material of the magnetic core 1 is difficult to form in one go, so the magnetic core 1 is designed to be assembled in multiple ways to meet the power requirements, and the number of magnetic cores 1 can be designed according to actual conditions.

[0042] Preferably, see Figure 3 As shown, a clearance groove 9 is circumferentially opened on the outer wall of the magnetic core 1, and a water-cooling circulation pipeline 10 is installed in the clearance groove 9. The shape and size of the clearance groove 9 are designed according to the shape and size of the water-cooling circulation pipeline 10, and the two need to match. The water-cooling circulation pipelines 10 on two adjacent magnetic cores 1 are connected by a connecting pipe 11, that is, the tail of the previous water-cooling circulation pipeline 10 is connected to the head of the next water-cooling circulation pipeline 10 by the connecting pipe 11.

[0043] Specifically, the water-cooling circulation pipeline 10 is stuck in the give way groove 9, which is convenient for the surrounding installation of the water-cooling circulation pipeline 10, and the contact area between the water-cooling circulation pipeline 10 and the magnetic core 1 is increased, thereby improving the heat dissipation effect of the transformer. At the same time, because the water-cooling circulation pipeline 10 is located inside the give way groove 9, when the winding is installed on the magnetic core 1, the contact between the water-cooling circulation pipeline 10 and the winding is reduced to avoid crushing the water-cooling circulation pipeline 10. If there are multiple magnetic cores 1, a connecting pipe 11 needs to be set between the water-cooling circulation pipelines 10 on adjacent magnetic cores 1, so that the coolant can flow from the water-cooling circulation pipelines 10 of one group of magnetic cores 1 to the water-cooling circulation pipelines 10 of another group of magnetic cores 1, thereby achieving the effect of heat dissipation for all magnetic cores 1.

[0044] Furthermore, one of the water-cooling circulation pipelines 10 on the two outermost magnetic cores 1 is installed with a water inlet pipeline 7 , and the other water-cooling circulation pipeline 10 is installed with a water outlet pipeline 8 .

[0045] Specifically, when the number of magnetic cores 1 is two, the water inlet pipe 7 is installed on the water cooling circulation pipeline 10 of one of the magnetic cores 1, and the water outlet pipe 8 is installed on the water cooling circulation pipeline 10 of another of the magnetic cores 1. When the number of magnetic cores 1 is three, the water cooling circulation pipeline 10 on the first magnetic core 1 is respectively installed with the water inlet pipe 7, and the water cooling circulation pipeline 10 on the third magnetic core 1 is respectively installed with the water outlet pipe 8, and so on; and a connecting pipe 11 is provided between adjacent water cooling circulation pipelines 10, so that the coolant flows in through the water inlet pipe 7 and flows out through the water outlet pipe 8, thereby completing a cycle, and this design only needs to install one water inlet pipe 7 and one water outlet pipe 8 to complete the function of heat dissipation for all the magnetic cores 1, thereby reducing the space occupied by the water inlet pipe 7 and the water outlet pipe 8 inside the transformer.

[0046] Preferably, NOMEX paper is provided between two adjacent windings in the first composite winding 3 , and NOMEX paper is provided between two adjacent windings in the second composite winding 4 .

[0047] Specifically, NOMEX paper, also known as Nome paper, is a synthetic aromatic amide polymer insulating paper with high mechanical properties, flexibility and good electrical properties, and can maintain its characteristics at higher temperatures; it improves the insulation effect between different windings and avoids significant mutual influence.

[0048] The method for manufacturing the high frequency high voltage transformer in the embodiment of the present invention is as follows Figure 1-5 As shown, it includes the following steps: Installing a water cooling circulation system on the magnetic core 1; The multi-layer composite insulating layer group 2 is mounted on the magnetic core 1 in a stepped manner, wherein the length of the composite insulating layer group 2 is shortened from the inside to the outside; The first winding, the second winding, the third winding and the fourth winding are sequentially wound in the first winding area of ​​the magnetic core 1 from the inside to the outside, and the wires for winding are reserved in the second winding area; First, the wires reserved for the fourth winding are wound around the second winding area of ​​the magnetic core 1, and then the wires reserved for the third winding are wound around the periphery of the fourth winding, and then the wires reserved for the second winding are wound around the periphery of the third winding, and finally the wires reserved for the first winding are wound around the periphery of the second winding; A first high-voltage lead 5 is installed at the end of the first composite winding 3, and a second high-voltage lead 6 is installed at the end of the second composite winding 4; Install other structures, including copper plates, guard plates, bolt assemblies, copper foils and shielding covers; The above structure is glued through a glue-filling tool template to form an epoxy resin glue layer 12 on the outside to form a high-frequency and high-voltage transformer.

[0049] It should be noted that the installation sequence of other structures can follow the installation sequence of the prior art, for example, the copper foil is arranged between the magnetic core 1 and the composite insulation layer group 2 , and the shielding cover is sleeved around the first composite winding 3 and the second composite winding 4 .

[0050] It can be seen that the present invention divides the magnetic core 1 into a first winding area and a second winding area, the first composite winding 3 is wound as a primary coil in the first winding area, and the second composite winding 4 is wound as a secondary coil in the second winding area, and the first composite winding 3 is wound first, and the first winding, the second winding, the third winding and the fourth winding are wound from the inside to the outside in sequence, and the wires of the second composite winding 4 are reserved after the first composite winding 3 is wound, that is, four wires are reserved, and after the first composite winding 3 is completely wound, the second composite winding 4 is wound. The second composite winding 4 is wound, and the fourth winding reserved wire is wound first to form the fifth winding, and then the third winding reserved wire is wound to form the sixth winding, and so on. The windings in the second winding area are the fifth winding, the sixth winding, the seventh winding and the eighth winding from the inside to the outside. Therefore, the above winding design enlarges the gap between the transformer layers. When the gap between the layers is larger, the amount of stored charge is less, thereby reducing the amount of charge stored in the transformer under high voltage conditions and increasing the service life of the transformer.

[0051] Preferably, a specific structure of a glue-filling tooling template is provided: The glue potting tooling template includes a tooling base 13, a tooling body 14 and a tooling plate 15. The tooling body 14 is arranged on the tooling base 13. The tooling base 13 is used to support the end of the transformer. The tooling plate 15 is detachably mounted on the tooling body 14 through a screw pin 16. A plurality of holes 17 are opened on the tooling plate 15, which are used for the first high-voltage lead 5 and the second high-voltage lead 6 to extend to the outside of the glue potting tooling template.

[0052] Specifically, the tooling base 13 supports the end of the transformer, and because the tooling plate 15 is detachably mounted on the tooling body 14 by means of the screw pin 16, it is convenient to place the transformer into the tooling body 14. When installing the tooling plate 15, it is necessary to align the hole 17 on the tooling plate 15 with the first high-voltage lead 5 and the second high-voltage lead 6 so that the first high-voltage lead 5 and the second high-voltage lead 6 extend to the outside of the glue pouring tooling template to avoid affecting the first high-voltage lead 5 and the second high-voltage lead 6 during glue pouring.

[0053] Preferably, a water cooling circulation system is installed on the magnetic core 1, specifically comprising: A clearance groove 9 is circumferentially provided on the outer wall of all magnetic cores 1; Install a water cooling circulation pipeline 10 in the position tank; A connecting pipe 11 is installed between the water cooling circulation pipes 10 on two adjacent magnetic cores 1; The water-cooling circulation pipelines 10 on the outermost magnetic core 1 have a water inlet pipe 7 installed on one of the water-cooling circulation pipelines 10 and a water outlet pipe 8 installed on another water-cooling circulation pipeline 10 to form a water-cooling circulation system.

[0054] Specifically, the water-cooling circulation pipeline 10 is stuck in the give way groove 9, which is convenient for the surrounding installation of the water-cooling circulation pipeline 10, and the contact area between the water-cooling circulation pipeline 10 and the magnetic core 1 is increased, thereby improving the heat dissipation effect of the transformer. At the same time, because the water-cooling circulation pipeline 10 is located inside the give way groove 9, when the winding is installed on the magnetic core 1, the contact between the water-cooling circulation pipeline 10 and the winding is reduced, thereby avoiding crushing the water-cooling circulation pipeline 10. If there are multiple magnetic cores 1, a connecting pipe 11 needs to be set between the water-cooling circulation pipelines 10 on adjacent magnetic cores 1. The coolant flows in through the water inlet pipe 7 and flows out through the water outlet pipe 8, thereby completing a cycle. In addition, this design only needs to install one water inlet pipe 7 and one water outlet pipe 8 to complete the heat dissipation of all the magnetic cores 1, thereby reducing the space occupied by the water inlet pipe 7 and the water outlet pipe 8 inside the transformer.

[0055] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A high frequency high voltage transformer, characterized in that: It includes: A magnetic core (1) comprising a first winding area and a second winding area, wherein a spacer area is provided between the first winding area and the second winding area; A first composite winding (3) is wound in a first winding area, one end of which is provided with a first high-voltage lead (5), the first composite winding (3) comprising, from the inside to the outside, a first winding, a second winding, a third winding and a fourth winding; A second composite winding (4) is wound in the second winding area, and a second high-voltage lead (6) is arranged at one end of the second composite winding (4), the second composite winding (4) comprising, from the inside to the outside, a fifth winding, a sixth winding, a seventh winding, and an eighth winding; Among them, the first winding is connected to the eighth winding, the second winding is connected to the seventh winding, the third winding is connected to the sixth winding, and the fourth winding is connected to the fifth winding.

2. The high-frequency high-voltage transformer according to claim 1, characterized in that: A plurality of composite insulating layer groups (2) are provided between the magnetic core (1) and the first composite winding (3), and between the magnetic core (1) and the second composite winding (4), and the composite insulating layer group (2) is sleeved on the magnetic core (1), and the composite insulating layer group (2) comprises multiple layers of composite insulating paper in sequence from the inside to the outside.

3. The high-frequency high-voltage transformer according to claim 2, characterized in that: The composite insulating layer group (2) is sleeved on the magnetic core (1) in a stepped manner, and the length of the innermost composite insulating layer group (2) is greater than the length of the outermost composite insulating layer group (2).

4. The high-frequency high-voltage transformer according to claim 2, characterized in that: The composite insulating paper comprises a PI film and a PTFE film, and the PI film and the PTFE film are laminated.

5. The high-frequency high-voltage transformer according to claim 1, characterized in that: The magnetic core (1) is multiple, including a plurality of U-shaped magnetic cores (1) and a strip-shaped magnetic core (1).

6. The high-frequency high-voltage transformer according to claim 5, characterized in that: A clearance groove (9) is circumferentially formed on the outer wall of the magnetic core (1), a water cooling circulation pipeline (10) is installed in the clearance groove (9), and the water cooling circulation pipelines (10) on two adjacent magnetic cores (1) are connected via a connecting pipe (11).

7. The high-frequency high-voltage transformer according to claim 6, characterized in that: The water cooling circulation pipelines (10) on the two outermost magnetic cores (1) are provided with a water inlet pipeline (7) installed on one of the water cooling circulation pipelines (10), and a water outlet pipeline (8) installed on the other water cooling circulation pipeline (10).

8. The high-frequency high-voltage transformer according to claim 1, characterized in that: NOMEX paper is provided between two adjacent windings in the first composite winding (3), and NOMEX paper is provided between two adjacent windings in the second composite winding (4).

9. A method for manufacturing a high-frequency and high-voltage transformer according to any one of claims 1 to 8, characterized in that: It includes the following steps: Installing a water cooling circulation system on the magnetic core (1); The multi-layer composite insulating layer group (2) is sleeved on the magnetic core (1) in a stepped manner, wherein the length of the composite insulating layer group (2) decreases from the inside to the outside; The first winding, the second winding, the third winding and the fourth winding are sequentially wound from the inside to the outside in a first winding area of ​​the magnetic core (1), and electric wires are reserved for winding in the second winding area; Firstly, the wires reserved for the fourth winding are wound around the second winding area of ​​the magnetic core (1), then the wires reserved for the third winding are wound around the periphery of the fourth winding, then the wires reserved for the second winding are wound around the periphery of the third winding, and finally the wires reserved for the first winding are wound around the periphery of the second winding; A first high-voltage lead (5) is installed at the end of the first composite winding (3), and a second high-voltage lead (6) is installed at the end of the second composite winding (4); Install other structures, including copper plates, guard plates, bolt assemblies, copper foils and shielding covers; Glue is poured through the glue pouring tooling template to form a high-frequency and high-voltage transformer.

10. The method for manufacturing a high-frequency and high-voltage transformer according to claim 9, characterized in that: The glue-filling tool template comprises a tool base (13), a tool body (14) and a tool plate (15); the tool body (14) is arranged on the tool base (13); the tool base (13) is used to support the end of the transformer; the tool plate (15) is detachably mounted on the tool body (14) via a screw pin (16); and a plurality of holes (17) are provided on the tool plate (15) for extending the first high-voltage lead (5) and the second high-voltage lead (6) to the outside of the glue-filling tool template.

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