Multi-magnetic-column LLC magnetic integrated transformer
Through the optimization of multi-magnetic column structure and coil winding method, the problems of large size and complex assembly of LLC transformers are solved, miniaturization and cost reduction are achieved.
Patent Information
- Application Number
- CN202422728715.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-09
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-11-09
AI Technical Summary
The volume of existing LLC transformers is greatly affected by the coil group and the assembly process is complicated, which increases the cost of components.
It adopts a multi-magnetic column structure, and is wound in series with the resonant inductor coil and the transformer primary coil, and the transformer primary coil and secondary coil are wound together, reducing the transformer size, simplifying the assembly process and reducing component costs.
The miniaturized design of the transformer is realized, the assembly process is simplified, and the component cost is reduced.
Smart Images
Figure CN223296637U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of inductors, in particular to a multi-magnetic column LLC magnetic integrated transformer. Background Art
[0002] With the advancement of science and technology and the development of electronics, more and more electronic devices require transformer components. LLC (resonant) transformers, with their combined no-load operating capability and ability to accurately reflect the load intensity of the resonant tank current, offer advantages unmatched by conventional series and parallel resonant transformers, leading to their widespread application. The LLC transformer, an improvement on the traditional LC second-order resonant transformer by adding a shunt inductor, offers advantages such as high switching frequency, low switching losses, a wide input voltage range, high efficiency, light weight, low EMI noise, and reduced switching stress.
[0003] However, as the installation space shrinks, the volume requirements for LLC transformers are higher. However, the current transformers are equipped with multiple sets of coils, and the volume is greatly affected by the coil groups. In addition, the assembly process is cumbersome, which increases the cost of components. Therefore, it is necessary to provide a multi-magnetic column LLC magnetic integrated transformer that is smaller in size and easier to produce to solve the above technical problems. Utility Model Content
[0004] In order to solve the above technical problems, the utility model provides a multi-magnetic column LLC magnetic integrated transformer which is small in size and easy to produce.
[0005] The utility model provides a multi-magnetic column LLC magnetic integrated transformer, which comprises a connector, a magnetic core is provided on the outside of the connector, a coil group is provided on one side of the magnetic core, and a wiring terminal is embedded and fixed in the inner cavity of the connector.
[0006] As the utility model provides a multi-magnetic column LLC magnetic integrated transformer, preferably, the connecting member includes a bottom plate, and the inner cavity of the bottom plate is provided with a through hole.
[0007] As the utility model provides a multi-magnetic column LLC magnetic integrated transformer, preferably, the magnetic core includes a first magnetic core chip, the first magnetic core chip is located on one side of the base plate, the second magnetic core chip is provided on the side of the coil group away from the base plate, the second magnetic core chip is provided on the side close to the coil group, and the number of the magnetic cores is set to six.
[0008] As the utility model provides a multi-magnetic column LLC magnetic integrated transformer, preferably, the magnetic core further includes a positioning hole opened in the inner cavity of the second magnetic core and an identification hole opened on one side of the second magnetic core.
[0009] As the utility model provides a multi-magnetic column LLC magnetic integrated transformer, preferably, the coil group includes a transformer secondary coil, the transformer secondary coil is located on one side of the base plate, and a combined coil is set on one side of the transformer secondary coil.
[0010] Compared with the prior art, the beneficial effects of the present invention are:
[0011] The multi-column LLC magnetic integrated transformer is a device that winds multiple coils in series: a resonant inductor coil is wound in series with the transformer primary coil, and the transformer primary coil is wound in parallel with the secondary coil of the secondary transformer. The coils are then assembled on different magnetic columns to reduce the size of the transformer, reduce the assembly process, and lower the cost of components. This solves the problem that the size of the current LLC transformer is greatly affected by the coil group, the assembly process is cumbersome, and the cost of components is increased. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 A schematic structural diagram of a preferred embodiment of a multi-column LLC magnetic integrated transformer provided by the utility model;
[0013] Figure 2 This is a schematic diagram of the exploded structure of the utility model;
[0014] Figure 3 This is a schematic structural diagram of the second magnetic core piece of the present invention.
[0015] Numbers in the figure: 1, connector; 101, bottom plate; 102, through hole; 2, magnetic core; 201, first magnetic core piece; 202, second magnetic core piece; 203, magnetic column; 204, identification hole; 205, positioning hole; 3, terminal; 4, coil group; 401, secondary coil of transformer; 402, combined coil. DETAILED DESCRIPTION
[0016] The present invention will be further described below with reference to the accompanying drawings and implementation examples.
[0017] Please refer to Figure 1 、 Figure 2 and Figure 3 ,in Figure 1 A schematic structural diagram of a preferred embodiment of a multi-column LLC magnetic integrated transformer provided by the utility model; Figure 2 This is a schematic diagram of the exploded structure of the utility model; Figure 3 A multi-column LLC magnetic integrated transformer includes a connector 1, a magnetic core 2 disposed on the outside of the connector 1, a coil assembly 4 disposed on one side of the magnetic core 2, and a terminal 3 embedded and fixed in the inner cavity of the connector 1.
[0018] As a technical optimization solution of the present invention, the connector 1 includes a bottom plate 101 , and a through hole 102 is formed in an inner cavity of the bottom plate 101 .
[0019] In this embodiment, a through hole 102 is provided on the bottom plate 101 to fit the magnetic column 203 . A plurality of connection terminals 3 are injection-molded on the bottom plate 101 to connect the winding coils and to be plugged into the female end of the main board.
[0020] As a technical optimization solution of the present invention, the magnetic core 2 includes a first magnetic core 201, which is located on one side of the base plate 101. A second magnetic core 202 is provided on the side of the coil group 4 away from the base plate 101. A magnetic column 203 is provided on the side of the second magnetic core 202 close to the coil group 4. The number of magnetic columns 203 is set to six.
[0021] The magnetic core 2 further includes a positioning hole 205 formed in the inner cavity of the second magnetic core 202 and an identification hole 204 formed on one side of the second magnetic core 202.
[0022] The coil group 4 includes a transformer secondary coil 401 . The transformer secondary coil 401 is located on one side of the bottom plate 101 . A combination coil 402 is provided on one side of the transformer secondary coil 401 .
[0023] In this embodiment: the combined coil 402 is composed of a transformer primary coil and a resonant inductor coil. The transformer primary and the resonant inductor are wound using the same wire, and there are six coils connected in series. The transformer secondary coil 401 is wound in parallel with the transformer primary coil, and there are four coils. This device uses multiple coils in series: the resonant inductor coil is wound in series with the transformer primary coil, and the transformer primary coil is wound in parallel with the secondary transformer secondary coil 401, and then assembled on different magnetic columns 203 to reduce the size of the transformer, reduce the assembly process, and reduce the cost of components. After the transformer secondary coil 401 and the combined coil 402 are assembled on the magnetic column 203, the base plate 101 is installed, and then connected to the mainboard through the terminal 3, reducing the mainboard wave soldering or reflow soldering process.
[0024] The working principle of the multi-column LLC magnetic integrated transformer provided by the utility model is as follows:
[0025] This device is wound in series with multiple coils: the resonant inductor coil is wound in series with the primary coil of the transformer, the primary coil of the transformer is wound in parallel with the secondary coil 401 of the secondary transformer, and then assembled on different magnetic columns 203 to reduce the size of the transformer, reduce the assembly process, and reduce the cost of components. When assembling this device, the resonant coil in the combined coil 402 is first wound on the jig, only half of it is needed, and then the primary coil of the transformer and the secondary coil 401 of the transformer in the combined coil 402 are wound at the same time, and the wound secondary coil 401 of the transformer and the combined coil 402 are assembled on the magnetic column 203 on one side of the second magnetic core sheet 202, and then the first magnetic core sheet 201 is assembled, and the bottom plate 101 of the injection-molded terminal 3 is assembled with the semi-finished product in the previous step, and the lead wire is welded to the terminal 3 to complete the assembly.
[0026] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A multi-column LLC magnetic integrated transformer, characterized in that: It comprises a connecting piece (1), a magnetic core (2) is provided on the outside of the connecting piece (1), a coil group (4) is provided on one side of the magnetic core (2), and a wiring terminal (3) is embedded and fixed in the inner cavity of the connecting piece (1).
2. The multi-column LLC magnetic integrated transformer according to claim 1, characterized in that: The connecting member (1) comprises a bottom plate (101), and a through hole (102) is provided in an inner cavity of the bottom plate (101).
3. The multi-column LLC magnetic integrated transformer according to claim 2, characterized in that: The magnetic core (2) comprises a first magnetic core (201), the first magnetic core (201) being located on one side of the base plate (101), a second magnetic core (202) being provided on a side of the coil group (4) away from the base plate (101), a magnetic column (203) being provided on a side of the second magnetic core (202) close to the coil group (4), and the number of the magnetic columns (203) being set to six.
4. The multi-column LLC magnetic integrated transformer according to claim 3, characterized in that: The magnetic core (2) further comprises a positioning hole (205) provided in the inner cavity of the second magnetic core piece (202), and an identification hole (204) provided on one side of the second magnetic core piece (202).
5. The multi-column LLC magnetic integrated transformer according to claim 2, characterized in that: The coil group (4) comprises a transformer secondary coil (401), the transformer secondary coil (401) is located on one side of the bottom plate (101), and a combined coil (402) is provided on one side of the transformer secondary coil (401).