Symmetrical high-frequency transformer structure
By using a symmetrical high-frequency transformer structure, the circuit board is superimposed on the magnetic core, which solves the problems of large size and poor frequency response of traditional transformers. This enables miniaturization and high-frequency operation, reduces current ripple, and improves stability and high-temperature resistance.
Patent Information
- Application Number
- CN202520504395.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-20
AI Technical Summary
Traditional transformers are bulky in switching power supplies, making them difficult to adapt to high-frequency power requirements, resulting in poor frequency response and failing to meet the needs of miniaturized and high-efficiency power supplies.
The symmetrical high-frequency transformer structure is adopted. By stacking multiple integrated electronic components on a circuit board into two identical magnetic cores, a left-right symmetrical structure is formed. This structure is suitable for LLC interleaved parallel connection schemes, which improves the operating frequency and reduces the output current ripple.
It achieves miniaturization and high-frequency operation of transformers, reduces output current ripple, improves overall stability and high-temperature resistance, and is suitable for high-efficiency and compact power supply requirements.
Smart Images
Figure CN223941646U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transformer technology, specifically to a symmetrical high-frequency transformer structure. Background Technology
[0002] In modern electronic devices, switching power supplies, as core power supply components, play a crucial role in the development of the entire device due to their performance and size. High-frequency transformers, as a key component of switching power supplies, significantly influence the overall performance of the power supply through their performance and physical characteristics.
[0003] In traditional switching power supply solutions, conventional transformers have significant limitations in achieving voltage conversion and DC output. Soldering a conventional transformer onto a PCB board and outputting DC via rectifier diodes results in a large transformer that occupies excessive space, severely hindering the miniaturization of switching power supplies. Furthermore, as power supply switching frequencies continue to increase, conventional transformers struggle to keep up, failing to achieve miniaturization goals and exhibiting poor frequency response, thus failing to meet the growing demand for efficient and compact power supplies. Utility Model Content
[0004] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by providing a symmetrical high-frequency transformer structure.
[0005] The objective of this utility model is achieved through the following technical solution: a symmetrical high-frequency transformer structure, comprising a first magnetic core, a second magnetic core, and a circuit board; the first magnetic core is provided with a first core post; the second magnetic core is provided with a second core post; the circuit board is disposed between the first magnetic core and the second magnetic core; one end of the circuit board is provided with a first transformer section; the other end of the circuit board is provided with a second transformer section; the first transformer section is sleeved outside the first core post; the second transformer section is sleeved outside the second core post; electronic components are provided in the middle of the circuit board;
[0006] The first transformer section and the second transformer section are provided with secondary copper rings; the first core column and the second core column are both wound with primary coils.
[0007] The present invention is further configured such that the first transformer section, the second transformer section, and the secondary copper ring are all circular.
[0008] The present invention is further configured such that the first core column and the second core column are symmetrically arranged; and the first transformer section and the second transformer section are symmetrically arranged.
[0009] The present invention is further configured such that the electronic components are a rectifier diode and a surface-mount capacitor.
[0010] The present invention is further configured such that the secondary copper ring is formed by copper plating inside the first transformer section and by copper plating inside the second transformer section.
[0011] The present invention is further configured such that a high-temperature diaphragm is provided between the primary coil and the circuit board.
[0012] The present invention is further configured such that an insulating film is provided between the primary coil and the circuit board.
[0013] The present invention is further configured such that the first magnetic core includes a first upper PQ magnetic core and a first lower PQ magnetic core; the first upper PQ magnetic core and the first lower PQ magnetic core abut together to form the first core post; the second magnetic core includes a second upper PQ magnetic core and a second lower PQ magnetic core; the second upper PQ magnetic core and the second lower PQ magnetic core abut together to form the second core post.
[0014] The present invention is further configured such that a copper pillar is provided in the middle of the circuit board.
[0015] The present invention is further configured such that multiple circuit boards are provided between the first magnetic core and the second magnetic core.
[0016] The beneficial effects of this utility model are as follows: This utility model forms a symmetrical structure by stacking multiple integrated electronic components on a circuit board into two identical magnetic cores. This scheme is suitable for LLC interleaved parallel connection schemes, which can reduce the ripple of the output current and increase the operating frequency to above MHz, effectively reducing the overall size. Attached Figure Description
[0017] The utility model will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present utility model. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This is a cross-sectional view of the present invention;
[0020] Figure 3 This is a schematic diagram of the circuit board structure of this utility model;
[0021] The components are: 1. First magnetic core; 11. First upper PQ magnetic core; 12. First lower PQ magnetic core; 13. First core post; 2. Second magnetic core; 21. Second upper PQ magnetic core; 22. Second lower PQ magnetic core; 23. Second core post; 3. Circuit board; 31. First transformer section; 32. Second transformer section; 4. Primary coil; 51. Rectifier tube; 52. Surface mount capacitor; 6. Copper pillar. Detailed Implementation
[0022] The present invention will be further described in conjunction with the following embodiments.
[0023] Depend on Figures 1 to 3 As can be seen, the symmetrical high-frequency transformer structure described in this embodiment includes a first magnetic core 1, a second magnetic core 2, and a circuit board 3. The first magnetic core 1 has a first core post 13; the second magnetic core 2 has a second core post 23; the circuit board 3 is disposed between the first magnetic core 1 and the second magnetic core 2; one end of the circuit board 3 has a first transformer section 31; the other end of the circuit board 3 has a second transformer section 32; the first transformer section 31 is sleeved on the first core post 13; the second transformer section 32 is sleeved on the second core post 23; electronic components are disposed in the middle of the circuit board 3; the first transformer section 31 and the second transformer section 32 are provided with secondary copper rings; both the first core post 13 and the second core post 23 are wound with primary coils 4; the secondary copper rings are not shown in the figure. In the symmetrical high-frequency transformer structure described in this embodiment, multiple circuit boards 3 are disposed between the first magnetic core 1 and the second magnetic core 2.
[0024] Specifically, the symmetrical high-frequency transformer structure described in this embodiment forms a left-right symmetrical structure by stacking multiple integrated electronic components on a circuit board 3 into two identical magnetic cores. This scheme is suitable for LLC interleaved parallel connection schemes, which can reduce the ripple of the output current and increase the operating frequency to above MHz, effectively reducing the overall size.
[0025] The symmetrical high-frequency transformer structure described in this embodiment features a first transformer section 31, a second transformer section 32, and a secondary copper ring, all of which are circular. This arrangement effectively ensures the stability of the overall structure.
[0026] This embodiment describes a symmetrical high-frequency transformer structure, in which the first core column 13 and the second core column 23 are symmetrically arranged; the first transformer section 31 and the second transformer section 32 are symmetrically arranged. This arrangement effectively ensures the stability of the overall structure and facilitates manufacturing.
[0027] This embodiment describes a symmetrical high-frequency transformer structure, in which the electronic components are rectifier diodes 51 and surface-mount capacitors 52. Specifically, the symmetrical high-frequency transformer structure of this embodiment stacks multiple integrated secondary-side rectifier diodes 51 and secondary-side output surface-mount capacitors 52 onto two identical magnetic cores to form a left-right symmetrical structure. This scheme is suitable for LLC interleaved parallel connection schemes, which can reduce output current ripple and increase the operating frequency to above MHz.
[0028] In this embodiment, a symmetrical high-frequency transformer structure is described, wherein the secondary copper ring is formed by copper plating inside the first transformer section 31 and the second transformer section 32. This design can reduce problems such as the skin effect.
[0029] This embodiment describes a symmetrical high-frequency transformer structure, in which a high-temperature diaphragm is provided between the primary coil 4 and the circuit board 3. The high-temperature diaphragm is not shown in the figure, but this feature improves the overall high-temperature resistance.
[0030] In this embodiment, a symmetrical high-frequency transformer structure is described, wherein an insulating film is provided between the primary coil 4 and the circuit board 3. The insulating film is not shown in the figure, but this arrangement ensures the insulation performance between the primary coil 4 and the secondary copper ring.
[0031] This embodiment describes a symmetrical high-frequency transformer structure. The first magnetic core 1 includes a first upper PQ magnetic core 11 and a first lower PQ magnetic core 12; the first upper PQ magnetic core 11 and the first lower PQ magnetic core 12 abut together to form the first core post 13; the second magnetic core 2 includes a second upper PQ magnetic core 21 and a second lower PQ magnetic core 22; the second upper PQ magnetic core 21 and the second lower PQ magnetic core 22 abut together to form the second core post 23. This configuration facilitates manufacturing and ensures the stability of the overall structure.
[0032] In this embodiment, a symmetrical high-frequency transformer structure is described, wherein a copper pillar 6 is provided in the middle of the circuit board 3. This arrangement facilitates connection with external devices.
[0033] This embodiment can increase the operating frequency to above MHz, achieving high power output in a small size; in addition, the integration of the secondary rectifier tube 51 and the secondary output surface-mount capacitor 52 can reduce the overall space layout of the circuit board 3; secondly, the reduction of the circuit size is beneficial to reducing radiation caused by output rectification; and the interleaved parallel structure is more conducive to output ripple.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.
Claims
1. A symmetrical high-frequency transformer structure, characterized in that: The circuit includes a first magnetic core (1), a second magnetic core (2), and a circuit board (3); the first magnetic core (1) has a first core post (13); the second magnetic core (2) has a second core post (23); the circuit board (3) is located between the first magnetic core (1) and the second magnetic core (2); one end of the circuit board (3) has a first transformer part (31); the other end of the circuit board (3) has a second transformer part (32); the first transformer part (31) is sleeved on the first core post (13); the second transformer part (32) is sleeved on the second core post (23); electronic components are provided in the middle of the circuit board (3); The first transformer section (31) and the second transformer section (32) are provided with secondary copper rings; the first core column (13) and the second core column (23) are both wound with primary coils (4).
2. The symmetrical high-frequency transformer structure according to claim 1, characterized in that: The first transformer section (31), the second transformer section (32), and the secondary copper ring are all circular.
3. The symmetrical high-frequency transformer structure according to claim 1, characterized in that: The first core column (13) and the second core column (23) are symmetrically arranged; the first transformer section (31) and the second transformer section (32) are symmetrically arranged.
4. The symmetrical high-frequency transformer structure according to claim 1, characterized in that: The electronic components are a rectifier diode (51) and a surface-mount capacitor (52).
5. A symmetrical high-frequency transformer structure according to claim 1, characterized in that: The secondary copper ring is formed by paving copper inside the first transformer section (31) and by paving copper inside the second transformer section (32).
6. The symmetrical high-frequency transformer structure according to claim 1, characterized in that: A high-temperature diaphragm is provided between the primary coil (4) and the circuit board (3).
7. A symmetrical high-frequency transformer structure according to claim 1, characterized in that: An insulating film is provided between the primary coil (4) and the circuit board (3).
8. The symmetrical high-frequency transformer structure according to claim 1, characterized in that: The first magnetic core (1) includes a first upper PQ magnetic core (11) and a first lower PQ magnetic core (12); the first upper PQ magnetic core (11) and the first lower PQ magnetic core (12) abut together to form the first core post (13); the second magnetic core (2) includes a second upper PQ magnetic core (21) and a second lower PQ magnetic core (22); the second upper PQ magnetic core (21) and the second lower PQ magnetic core (22) abut together to form the second core post (23).
9. A symmetrical high-frequency transformer structure according to claim 1, characterized in that: The circuit board (3) has a copper pillar (6) in the middle.
10. A symmetrical high-frequency transformer structure according to claim 1, characterized in that: Multiple circuit boards (3) are provided between the first magnetic core (1) and the second magnetic core (2).