High-voltage pulse transformer
By adopting the design of coaxially sleeved insulating skeleton and insulating plate in the high-voltage pulse transformer, the problems of large volume and unstable insulation are solved, and the insulation is improved and the structure is compact, which is suitable for miniaturization and integrated applications.
Patent Information
- Application Number
- CN202422981023.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-04
AI Technical Summary
Existing high-voltage pulse transformers have the problems of large size and unstable insulation, which limits the miniaturization and integrated application of the equipment.
By adopting the coaxially sleeved first and second insulating frames, combined with the insulating top plate and insulating bottom plate and the fixed top plate and fixed bottom plate, the insulation of the transformer is improved and the structure is compact. By using high magnetic permeability thin-strip silicon steel and polypropylene materials, the difficulty of winding is reduced and the mechanical strength is enhanced.
The insulation of the transformer is improved, the volume is reduced, and the difficulty of winding is reduced. The structure is compact and suitable for scenarios such as food sterilization, pulse plasma and electrostatic precipitator, meeting the needs of equipment miniaturization and integration.
Smart Images
Figure CN223462091U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to transformer field especially a high voltage pulse transformer. BACKGROUND
[0002] In recent years, high voltage pulse technology develops rapidly, and the potential and value of high voltage pulse technology are continuously researched and excavated, and gradually expand to medical diagnosis equipment, food safety detection, electrical equipment fault detection and other civil fields closely related to people's life. High voltage pulse transformer is a device for converting low voltage input into high voltage output, mainly used for generating transient high voltage pulse. The high voltage pulse transformer is different from the traditional power transformer, which not only requires generating high voltage output in a short time, but also needs to ensure the quality of output waveform, such as rising edge time and pulse width. This puts forward higher requirements for the design, winding structure, core material and insulation design of the transformer.
[0003] At present, the research of high voltage pulse transformer mainly focuses on improving its output performance and voltage resistance level. In order to improve the stability of pulse output voltage, the design trend in recent years is higher transformation ratio, more compact core structure and more pressure-resistant insulation material. However, in practical application, the existing pulse transformer design often has problems such as large volume, easy saturation of core, and unstable insulation, which limits the miniaturization and integration application of the equipment. UTILITY MODEL CONTENT
[0004] The purpose of the utility model is to provide a high voltage pulse transformer. To solve the technical problem of large volume and unstable insulation of the existing high voltage pulse transformer.
[0005] A high voltage pulse transformer, comprising a hairpin core, two first insulation skeletons respectively sleeved on two core columns of the hairpin core, and a second insulation skeleton respectively sleeved on the outer sides of the two first insulation skeletons.
[0006] The primary winding is wound on the first insulation skeleton, and the secondary winding is wound on the second insulation skeleton.
[0007] Optionally, the primary winding comprises two primary coils connected in parallel, and the two primary coils are wound on the two first insulation skeletons respectively.
[0008] The secondary winding comprises two secondary coils connected in series, and the two secondary coils are wound on the two second insulation skeletons respectively.
[0009] Optionally, the hairpin core comprises two symmetrical C-shaped cores, and the open ends of the two C-shaped cores are connected to each other.
[0010] Optionally, the first insulation framework comprises a first sleeve and first flange plates arranged at both ends of the first sleeve, and the first sleeve is sleeved on the core columns of the U-shaped core;
[0011] The second insulation framework comprises a second sleeve and second flange plates arranged at both ends of the second sleeve, and the second sleeve is sleeved on the outer sidewall of the first flange plates;
[0012] The primary coil is wound on the outer wall of the first sleeve, and the secondary coil is wound on the outer wall of the second sleeve.
[0013] Optionally, the U-shaped core is further sleeved with an insulation top plate and an insulation bottom plate between the two core columns of the U-shaped core;
[0014] The insulation top plate and the insulation bottom plate are both provided with two sleeve holes corresponding to the two core columns of the U-shaped core, the insulation top plate is sleeved on the core column above the first insulation framework and the second insulation framework, and the insulation bottom plate is sleeved on the core column below the first insulation framework and the second insulation framework.
[0015] Optionally, the upper end faces of the first insulation framework and the second insulation framework are defined as framework upper end faces, and the lower end faces of the first insulation framework and the second insulation framework are defined as framework lower end faces;
[0016] The upper and lower end faces of the insulation top plate are respectively attached to the inner upper end face of the U-shaped core and the framework upper end face, and the upper and lower end faces of the insulation bottom plate are respectively attached to the inner lower end face of the U-shaped core and the framework lower end face.
[0017] Optionally, the fixing top plate and the fixing bottom plate are further arranged at the upper and lower ends of the U-shaped core.
[0018] Optionally, the fixing top plate and the fixing bottom plate are respectively provided with a top fixing hole and a bottom fixing hole;
[0019] The top and bottom of the U-shaped core are respectively clamped in the top fixing hole and the bottom fixing hole.
[0020] Optionally, the fixing top plate and the fixing bottom plate are respectively provided with a plurality of top mounting holes and bottom mounting holes;
[0021] The plurality of top mounting holes and bottom mounting holes are one-to-one corresponding, and nylon screws are locked between the top mounting holes and the bottom mounting holes.
[0022] Optionally, the fixing top plate is provided with a plurality of lead holes.
[0023] Due to the adoption of the above technical scheme, the utility model has the advantages that:
[0024] 1、The application improves the insulation of the transformer by setting the coaxial first insulation framework and the second insulation framework, reduces the volume of the transformer, and the split insulation framework reduces the difficulty of winding.
[0025] 2、The application fixes the first insulation framework and the second insulation framework and the U-shaped iron core through the insulation top plate and the insulation bottom plate, fixes the U-shaped iron core through the fixed top plate and the fixed bottom plate, is simple in assembly, and is high in insulation.
[0026] 3、The pulse transformer provided by the application has compact structure and light weight, so that the device has higher operation flexibility, is suitable for food sterilization, pulse plasma and electric dust removal scenes, and meets the needs of device miniaturization and integration.
[0027] The other advantages, objects and features of the utility model will be described in the subsequent specification to some extent, and to some extent, will be obvious to those skilled in the art based on the study of the following text or can be taught from the practice of the utility model. The objects and other advantages of the utility model can be realized and obtained through the following specification. BRIEF DESCRIPTION OF DRAWINGS
[0028] The drawings of the utility model are as follows.
[0029] Figure 1 It is a structural schematic view of the high-voltage pulse transformer of the utility model.
[0030] Figure 2 It is a partial sectional view of the first insulation framework and the second insulation framework of the utility model.
[0031] Figure 3 It is a structural schematic view of the second insulation framework of the utility model.
[0032] Figure 4 It is a structural schematic view of the U-shaped iron core of the utility model.
[0033] Figure 5 It is a structural schematic view of the primary coil and the secondary coil connection circuit of the utility model.
[0034] Figure 6 It is a structural schematic view of the insulation top plate of the utility model.
[0035] Figure 7 It is a structural schematic view of the fixed top plate of the utility model.
[0036] Figure 8 It is a structural schematic view of the fixed bottom plate of the utility model.
[0037] In the figure: 1 - a hairpin core; 101 - a C-shaped core; 2 - a first insulating framework; 201 - a first sleeve; 202 - a first flange plate; 3 - a second insulating framework; 301 - a second sleeve; 302 - a second flange plate; 4 - a primary winding; 5 - a secondary winding; 6 - an insulating top plate; 601 - a sleeve hole; 7 - an insulating bottom plate; 8 - a fixed top plate; 801 - a top fixing hole; 802 - a top mounting hole; 803 - a lead hole; 9 - a fixed bottom plate; 901 - a bottom fixing hole; 902 - a bottom mounting hole. DETAILED DESCRIPTION
[0038] The utility model will be further explained in connection with the drawings and examples.
[0039] Example 1:
[0040] As shown in Figure 1 , Figure 2 and Figure 3 , a high-voltage pulse transformer includes a hairpin core 1, two first insulating frameworks 2 respectively sleeved on two core columns of the hairpin core 1, and a second insulating framework 3 respectively sleeved on the outer sides of the two first insulating frameworks 2.
[0041] A primary winding is wound on the first insulating framework 2, and a secondary winding is wound on the second insulating framework 3.
[0042] As shown in Figure 5 , the primary winding includes two primary windings 4 connected in parallel, and the two primary windings 4 are respectively wound on the two first insulating frameworks 2.
[0043] The secondary winding includes two secondary windings 5 connected in series, and the two secondary windings 5 are respectively wound on the two second insulating frameworks 3.
[0044] In this embodiment, the hairpin core 1 is made of high magnetic permeability thin strip silicon steel, and is designed with an air gap to prevent it from being easily saturated and to improve its magnetic performance. The first insulating framework 2 and the second insulating framework 3 are both made of polypropylene material, and the insulation of the first insulating framework 2 and the second insulating framework 3 ensures a safe distance.
[0045] In this embodiment, the primary winding 4 and the secondary winding 5 are both wound with TIW-2 type three-layer insulated wire, which includes a conductor, a first insulating layer, a second insulating layer, and a third insulating layer from inside to outside, wherein the first layer is used for basic electrical insulation, the second layer is used for mechanical strength enhancement, and the third layer is used for environmental protection and voltage resistance performance improvement. As an embodiment of the present application, the interlayer insertion of insulating paper between the primary winding and the secondary winding serves as interlayer insulation, ensuring good insulation between different layers.
[0046] In the embodiment, the primary coil 4 and the secondary coil 5 are distributed around the window of the U-shaped core 1 by parallel close winding, the first insulation skeleton 2 and the second insulation skeleton 3 are closely combined with the coils, the uniformity of the coil distribution and the structural stability are ensured, and thus the influence of the leakage inductance and the distributed capacitance on the output waveform is reduced.
[0047] As an embodiment of the application, a 5kv high-voltage pulse transformer, the input pulse source voltage is 0-1kv, and the maximum rated output voltage is 5kv. The width of the U-shaped core 1 is 3cm, the thickness is 4cm, and the cross-sectional area is 12cm². The height of the inner window of the U-shaped core 1 is 3cm, the width is 3cm, and the four corners of the window are designed as a 1mm guide angle to optimize the electric field distribution. The number of turns of the primary winding is 20 turns, the number of turns of the secondary winding is 100 turns, the wire diameter of the selected winding wire is 0.2mm, the outer diameter is 0.43mm, and the winding is wound by a winding machine, and the average height of the winding is 15mm.
[0048] As shown in Figure 4 , the U-shaped core 1 includes two symmetrically arranged C-shaped cores 101, and the opening ends of the two C-shaped cores 101 are connected to each other.
[0049] In the embodiment, the U-shaped core 1 is provided as two C-shaped cores 101, and during the production of the transformer, the coils can be wound on the first insulation skeleton 2 and the second insulation skeleton 3, and then the two C-shaped cores 101 are inserted into the inner holes of the two first insulation skeletons 2 from the upper and lower ends, respectively, which greatly reduces the difficulty of winding the coils.
[0050] As shown in Figure 2 , the first insulation skeleton 2 includes a first sleeve 201 and first flange plates 202 arranged at both ends of the first sleeve 201, and the first sleeve 201 is sleeved on the core column of the U-shaped core 1.
[0051] The second insulation skeleton 3 includes a second sleeve 301 and second flange plates 302 arranged at both ends of the second sleeve 301, and the second sleeve 301 is sleeved on the outer sidewall of the first flange plate 202.
[0052] The primary coil 4 is wound on the outer wall of the first sleeve 201, and the secondary coil 5 is wound on the outer wall of the second sleeve 301.
[0053] In the embodiment, the first sleeve 201 and the second sleeve 301 are both rectangular sleeves, and the outer wall of the rectangular sleeve is treated by R corner turning to prevent high-voltage tip discharge and scratching of the wire insulation layer during the winding production process. In the embodiment, the first insulation skeleton 2 and the second insulation skeleton 3 have the same height, and the upper and lower end faces of the first insulation skeleton 2 and the second insulation skeleton 3 are flush when they are sleeved and installed.
[0054] As Figure 1 and Figure 6 shown, the two core columns of the U-shaped core 1 are further sleeved with an insulating top plate 6 and an insulating bottom plate 7;
[0055] The insulating top plate 6 and the insulating bottom plate 7 are both provided with two sleeving holes 601 corresponding to the two core columns of the U-shaped core 1, the insulating top plate 6 is sleeved on the core column above the first insulating framework 2 and the second insulating framework 3, and the insulating bottom plate 7 is sleeved on the core column below the first insulating framework 2 and the second insulating framework 3.
[0056] As Figure 1 and Figure 6 shown, the upper end face of the first insulating framework 2 and the second insulating framework 3 is defined as a framework upper end face, and the lower end face of the first insulating framework 2 and the second insulating framework 3 is defined as a framework lower end face;
[0057] The upper and lower end faces of the insulating top plate 6 are respectively attached to the inner side upper end face of the U-shaped core 1 and the framework upper end face, and the upper and lower end faces of the insulating bottom plate 7 are respectively attached to the inner side lower end face of the U-shaped core 1 and the framework lower end face.
[0058] In this embodiment, the first insulating framework 2 and the second insulating framework 3 are relatively fixed with the U-shaped core 1 through the insulating top plate 6 and the insulating bottom plate 7.
[0059] As Figure 7 and Figure 8 shown, it further includes a fixed top plate 8 and a fixed bottom plate 9, and the fixed top plate 8 and the fixed bottom plate 9 are respectively arranged at the upper and lower ends of the U-shaped core 1.
[0060] In this embodiment, the fixed top plate 8 and the fixed bottom plate 9 are both FR4 glass fiber plates, which have good insulation, and the U-shaped core 1 is mechanically fixed through the FR4 glass fiber plates, thereby forming a high-strength support structure to ensure the stability of the equipment in high-voltage operation.
[0061] As Figure 7 and Figure 8 shown, the fixed top plate 8 and the fixed bottom plate 9 are provided with a top fixed hole 801 and a bottom fixed hole 901 respectively;
[0062] The top and bottom of the U-shaped core 1 are respectively clamped in the top fixed hole 801 and the bottom fixed hole 901.
[0063] In this embodiment, the width of the top fixed hole 801 and the bottom fixed hole 901 is the same as the thickness of the U-shaped core 1, and the length of the top fixed hole 801 and the bottom fixed hole 901 is less than the maximum width of the U-shaped core 1, so that the upper and lower ends of the U-shaped core 1 can be clamped in the top fixed hole 801 and the bottom fixed hole 901.
[0064] As Figure 7 and Figure 8 The fixed top plate 8 and the fixed bottom plate 9 are respectively provided with a plurality of top mounting holes 802 and bottom mounting holes 902;
[0065] The plurality of top mounting holes 802 and bottom mounting holes 902 are one-to-one corresponding, and nylon screws are locked between the top mounting holes 802 and the bottom mounting holes 902.
[0066] In the embodiment, the top mounting holes 802 and the bottom mounting holes 902 are all M12 holes. In the production of the transformer, the coil is first wound on the first insulating framework 2 and the second insulating framework 3, then the second insulating framework 3 is sleeved outside the first insulating framework 2, then the insulating top plate 6 and the insulating bottom plate 7 are respectively arranged on the upper end surface and the lower end surface of the framework, then the two C-shaped iron cores 101 are respectively inserted into the sleeving holes 601 of the insulating top plate 6 and the insulating bottom plate 7 and the inner hole of the first insulating framework 2 to form the C-shaped iron core 1, then the top fixing hole 801 and the bottom fixing hole 901 are respectively clamped on the upper end and the lower end of the two C-shaped iron cores 1, and the reinforcing nylon screw is inserted into the top mounting hole 802 and the bottom mounting hole 902 to realize the production of the transformer.
[0067] As Figure 7 The fixed top plate 8 is provided with a plurality of lead holes 803.
[0068] In the embodiment, the lead hole 803 includes a secondary high-voltage lead hole, a secondary low-voltage lead hole and a primary input lead hole. The lead hole is slotted and directly penetrates the top plate, which is used for fixing the lead wire. The lead wire is stably fixed by the buckle type clamp or the lead wire ring in the hole to prevent movement. In the embodiment, the insulating top plate 6 and the upper end surface of the first flange plate 202 are both provided with a threading hole. The primary input lead wire is introduced through the primary input lead hole and passes through the threading hole to be connected with the primary winding.
[0069] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced, and any modification or equivalent replacement without departing from the spirit and scope of the present application should be covered in the protection scope of the claims of the present application.
Claims
1. A high voltage pulse transformer, characterized in that The core (1) is a U-shaped core, and two first insulating frames (2) are respectively sleeved on two core columns of the U-shaped core (1), and a second insulating frame (3) is sleeved on the outer side of the two first insulating frames (2); A primary winding is wound on the first insulating frame (2), and a secondary winding is wound on the second insulating frame (3).
2. A high voltage pulse transformer according to claim 1, characterized in that The primary winding comprises two primary coils (4) connected in parallel, and the two primary coils (4) are respectively wound on the two first insulating frames (2); The secondary winding comprises two secondary coils (5) connected in series, and the two secondary coils (5) are respectively wound on the two second insulating frames (3).
3. A high voltage pulse transformer according to claim 1, characterized in that The U-shaped core (1) comprises two symmetrical C-shaped cores (101), and the opening ends of the two C-shaped cores (101) are connected to each other.
4. A high voltage pulse transformer according to claim 2, characterized in that The first insulating frame (2) comprises a first sleeve (201) and first flange plates (202) arranged at both ends of the first sleeve (201), and the first sleeve (201) is sleeved on the core column of the U-shaped core (1); The second insulating frame (3) comprises a second sleeve (301) and second flange plates (302) arranged at both ends of the second sleeve (301), and the second sleeve (301) is sleeved on the outer side wall of the first flange plate (202); The primary coil (4) is wound on the outer wall of the first sleeve (201), and the secondary coil (5) is wound on the outer wall of the second sleeve (301).
5. A high voltage pulse transformer according to claim 1, characterized in that The U-shaped core (1) is further sleeved with an insulating top plate (6) and an insulating bottom plate (7) between the two core columns thereof; The insulating top plate (6) and the insulating bottom plate (7) are both provided with two sleeve holes (601) corresponding to the two core columns of the U-shaped core (1), the insulating top plate (6) is sleeved on the core column above the first insulating frame (2) and the second insulating frame (3), and the insulating bottom plate (7) is sleeved on the core column below the first insulating frame (2) and the second insulating frame (3).
6. A high voltage pulse transformer according to claim 5, characterized in that The upper end surface of the first insulating frame (2) and the second insulating frame (3) is defined as a frame upper end surface, and the lower end surface of the first insulating frame (2) and the second insulating frame (3) is defined as a frame lower end surface; The upper and lower end surfaces of the insulating top plate (6) are respectively attached to the inner upper end surface of the U-shaped core (1) and the frame upper end surface, and the upper and lower end surfaces of the insulating bottom plate (7) are respectively attached to the inner lower end surface of the U-shaped core (1) and the frame lower end surface.
7. A high voltage pulse transformer according to claim 1, characterized in that Further comprising a fixed top plate (8) and a fixed bottom plate (9), the fixed top plate (8) and the fixed bottom plate (9) are respectively arranged at the upper and lower ends of the U-shaped core (1).
8. A high voltage pulse transformer according to claim 7, characterized in that The fixed top plate (8) and the fixed bottom plate (9) are respectively provided with a top fixing hole (801) and a bottom fixing hole (901); The top and bottom of the U-shaped core (1) are respectively clamped in the top fixing hole (801) and the bottom fixing hole (901).
9. A high voltage pulse transformer according to claim 8, characterized in that The fixed top plate (8) and the fixed bottom plate (9) are respectively provided with a plurality of top mounting holes (802) and bottom mounting holes (902). A plurality of top mounting holes (802) and bottom mounting holes (902) are one-to-one corresponding, and nylon screws are locked between the top mounting holes (802) and the bottom mounting holes (902).
10. A high voltage pulse transformer according to claim 7, characterized in that A plurality of lead holes (803) are formed in the fixed top plate (8).