Structure for shielding magnetic field between high-voltage coil and low-voltage coil
By setting a multi-layer copper foil structure on the insulating cylinder, the problem of unsatisfactory magnetic field shielding effect between high and low voltage coils is solved, achieving efficient magnetic field shielding and cost savings.
Patent Information
- Application Number
- CN202423011809.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-06
AI Technical Summary
In existing technologies, the magnetic field shielding effect between high-voltage and low-voltage coils is not ideal, especially for transformers with greater height, where copper foil is difficult to process, costly, and time-consuming.
The device employs a multi-layered copper foil structure on an insulating cylinder, with the copper foil corresponding to the coil. The electromagnetic field is led to the bottom of the device by overlapping and leading out copper foil strips. The copper foil thickness is over 70μm, the material is readily available, the structure is simple, and it is easy to manufacture.
It effectively shields magnetic field interference between high and low voltage coils, protects the low voltage coil for normal operation, reduces costs, and simplifies the manufacturing process.
Smart Images
Figure CN223539437U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transformer technology, specifically to a structure for shielding the magnetic field between high-voltage and low-voltage coils. Background Technology
[0002] In power systems, high-voltage and low-voltage equipment often interfere with each other due to their close proximity. For example, when a high-voltage coil is working, it generates an electromagnetic field. If this electromagnetic field is not effectively shielded, it may interfere with the normal operation of the low-voltage coil.
[0003] In existing technologies, a single piece of copper foil is usually placed between the high and low voltage coils. This approach does not provide ideal shielding for the magnetic field. Furthermore, for transformers with high coil heights, it is difficult to process copper foil of the corresponding width, resulting in higher costs and longer manufacturing time. Utility Model Content
[0004] The purpose of this invention is to provide a structure for shielding the magnetic field between high-voltage and low-voltage coils, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a structure for shielding the magnetic field between high-voltage and low-voltage coils, comprising an insulating cylinder, wherein a first copper foil, a second copper foil, and a third copper foil are arranged sequentially from top to bottom on the insulating cylinder, the positions of the first copper foil, the second copper foil, and the third copper foil correspond to each segment of the low-voltage coil of the insulating cylinder, a first gap and a second gap are provided between the first copper foil, the second copper foil, and the third copper foil, the first gap is provided with a first overlapping copper foil strip, the second gap is provided with a second overlapping copper foil strip, and the bottom end of the third copper foil is provided with an outgoing copper foil strip.
[0006] Preferably, insulating paper is provided at the connection between the lead-out copper foil strip and the third copper foil.
[0007] Preferably, the thickness of the first copper foil, the second copper foil, and the third copper foil is 70 μm or more.
[0008] Preferably, the insulating paper is DuPont Nomex insulating paper, copper foil shielding paper, aluminum foil shielding paper, or DMD insulating paper.
[0009] Preferably, the widths of the first overlapping copper foil strip and the second overlapping copper foil strip are 50 mm.
[0010] Preferably, the heights of the first copper foil, the second copper foil, and the third copper foil are the same as the heights of their respective low-voltage coils.
[0011] Compared with the prior art, the beneficial effects of this utility model are: by setting copper foil corresponding to the low-voltage coil on the insulating cylinder and connecting the copper foils to each other, the electromagnetic field is finally led to the bottom of the equipment by leading out the copper foil strip, which can effectively protect the low-voltage coil from the magnetic field generated by the high-voltage coil. In addition, the structure of this utility model is simple, the materials are readily available, and it is easy to manufacture, which can save costs. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model.
[0013] In the diagram: 1. Insulating cylinder; 2. First copper foil; 3. Second copper foil; 4. Third copper foil; 5. First gap; 6. Second gap; 7. First overlapping copper foil strip; 8. Second overlapping copper foil strip; 9. Lead-out copper foil strip; 10. Insulating paper. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] Please see Figure 1 This utility model provides a technical solution: a structure for shielding the magnetic field between high and low voltage coils, including an insulating cylinder 1. The insulating cylinder 1 is provided with a first copper foil 2, a second copper foil 3 and a third copper foil 4 from top to bottom. The positions of the first copper foil 2, the second copper foil 3 and the third copper foil 4 correspond to each segment of the low voltage coil of the insulating cylinder 1. A first gap 5 and a second gap 6 are provided between the first copper foil 2, the second copper foil 3 and the third copper foil 4. The first gap 5 is provided with a first overlapping copper foil strip 7. The second gap 6 is provided with a second overlapping copper foil strip 8. The bottom end of the third copper foil 4 is provided with a lead-out copper foil strip 9.
[0016] In one embodiment of this utility model, insulating paper 10 is provided at the connection between the lead-out copper foil strip 9 and the third copper foil 4.
[0017] In one embodiment of this utility model, the thickness of the first copper foil 2, the second copper foil 3, and the third copper foil 4 is all above 70 μm.
[0018] In one embodiment of this utility model, the insulating paper 10 is DuPont Nomex insulating paper, copper foil shielding paper, aluminum foil shielding paper, or DMD insulating paper.
[0019] In one embodiment of this utility model, the width of the first overlapping copper foil strip 7 and the second overlapping copper foil strip 8 is 50mm.
[0020] In one embodiment of this utility model, the heights of the first copper foil 2, the second copper foil 3, and the third copper foil 4 are the same as the heights of the corresponding low-voltage coils.
[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A structure for shielding the magnetic field between high-voltage and low-voltage coils, characterized in that: The device includes an insulating cylinder (1), on which a first copper foil (2), a second copper foil (3), and a third copper foil (4) are arranged sequentially from top to bottom. The positions of the first copper foil (2), the second copper foil (3), and the third copper foil (4) correspond to each segment of the low-voltage coil of the insulating cylinder (1). A first gap (5) and a second gap (6) are provided between the first copper foil (2), the second copper foil (3), and the third copper foil (4). A first overlapping copper foil strip (7) is provided in the first gap (5), and a second overlapping copper foil strip (8) is provided in the second gap (6). A lead-out copper foil strip (9) is provided at the bottom end of the third copper foil (4).
2. The structure for shielding the magnetic field between high-voltage and low-voltage coils according to claim 1, characterized in that: Insulating paper (10) is provided at the connection between the lead-out copper foil strip (9) and the third copper foil (4).
3. The structure for shielding the magnetic field between high-voltage and low-voltage coils according to claim 1, characterized in that: The thickness of the first copper foil (2), the second copper foil (3), and the third copper foil (4) is all above 70 μm.
4. A structure for shielding the magnetic field between high-voltage and low-voltage coils according to claim 2, characterized in that: The insulating paper (10) is DuPont Nomex insulating paper, copper foil shielding paper, aluminum foil shielding paper or DMD insulating paper.
5. A structure for shielding the magnetic field between high-voltage and low-voltage coils according to claim 1, characterized in that: The width of the first overlapping copper foil strip (7) and the second overlapping copper foil strip (8) is 50 mm.
6. A structure for shielding the magnetic field between high-voltage and low-voltage coils according to claim 1, characterized in that: The heights of the first copper foil (2), the second copper foil (3), and the third copper foil (4) are the same as the heights of the corresponding low-voltage coils.