Transformer structure with semi-winding type primary outgoing line
By adopting a semi-wrapping primary outgoing structure in the transformer, using the combination of PCB board, mount, magnetic core and copper foil, the voltage conversion of non-integer turns is achieved, solving the problems of complex design and large leakage inductance of existing transformers, and achieving the effect of simplifying design and reducing volume.
Patent Information
- Application Number
- CN202421936560.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-09
AI Technical Summary
The turns ratio of existing transformers on the primary and secondary sides is usually integer, which is difficult to meet the special voltage transition needs, resulting in complex design and large volume, and the connection of the top fly wire can easily lead to large leakage inductance.
The transformer structure with semi-wrapping primary outlet is adopted. Through the combination of PCB board, mount, magnetic core and copper foil, the voltage conversion of non-integer turns is achieved, and the production process is simplified to avoid leakage inductance caused by the connection of the top fly wire.
The non-integer turns ratio that meets the special pressure change needs is realized, which simplifies the transformer design and production process, avoids the need for large leakage inductance and peripheral package shielding, and reduces the volume and weight of the transformer.
Smart Images
Figure CN223038754U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformers, in particular to a transformer structure with a semi-wound primary lead-out. Background Art
[0002] For the transformers on the market, the turns ratio of the primary side and the secondary side is usually an integer ratio, such as N:M, where N and M are natural numbers. However, sometimes the integer ratio may not be able to achieve the target voltage conversion. Therefore, multiple transformers or multiple coils need to be set up, and only through complex winding methods can the requirements be met. This design complicates the transformer, increases the volume and weight of the transformer. In addition, the current transformer winding methods all require flying wire connections on the top of the transformer, which easily leads to large leakage inductance, and also requires shielding around the transformer. Summary of the Invention
[0003] The utility model provides a transformer structure with a semi-wound primary lead-out for the problems of the prior art. The structure is novel, and while meeting special voltage transformation requirements, it does not increase the volume of the transformer; it simplifies the manufacturing method of the transformer and can avoid the problem of large leakage inductance caused by flying wires on the top of the transformer.
[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0005] The utility model provides a transformer structure with a semi-wound primary lead-out, which includes a PCB board, a mounting seat installed on the PCB board, and a magnetic core installed on the mounting seat. There is a copper foil on the PCB board, and the copper foil is located below the mounting seat; one side of the mounting seat is the primary side and is provided with a plurality of primary side pins, and the other side of the mounting seat is the secondary side and is provided with a plurality of secondary side pins. The primary side pins and the secondary side pins are respectively connected to the copper foil;
[0006] The transformer structure with a semi-wound primary lead-out further includes a plurality of primary side coils and a plurality of secondary side coils. The primary side coils are wound around the outer periphery of the magnetic core, and the two ends of the primary side coils are respectively electrically connected to different primary side pins;
[0007] The same-name ends of the secondary side coils are connected to the secondary side pins. Starting from the same-name ends, after the secondary side coils wind around the magnetic core for several turns and return to the starting point, they continue to wind around the magnetic core until the different-name ends of the secondary side coils are located on the primary side of the mounting seat, and the different-name ends of the secondary side coils are then electrically connected to the secondary side pins through the copper foil.
[0008] Wherein, a positioning member is arranged on the top of the mounting seat. The positioning member is provided with a positioning groove, and a through groove is arranged through the middle of the positioning member. The positioning groove communicates with the through groove.
[0009] Among them, the magnetic core includes two E-shaped magnets arranged opposite to each other.
[0010] Among them, fixing holes are respectively arranged at the corners of the PCB board.
[0011] Advantages of the present utility model:
[0012] The structure of the present utility model is novel and ingeniously designed, so that the same-named ends and different-named ends of the secondary-side coil are not on the same side of the mounting base, thereby obtaining a non-integer number of turns, which can meet special voltage transformer requirements. At the same time, the structure of the half-wound main transformer of the present utility model is simple, and it will not increase the volume of the transformer while meeting special voltage transformer requirements; further, the present utility model connects the same-named end of the secondary-side coil to the secondary-side pin. Starting from the same-named end, after the secondary-side coil winds around the magnetic core for several turns and returns to the starting point, it continues to wind around the magnetic core until the different-named end of the secondary-side coil is located on the primary side of the mounting base, and the different-named end of the secondary-side coil is electrically connected to the secondary-side pin through a copper foil, which simplifies the manufacturing method of the transformer and can avoid the problem of large leakage inductance caused by flying wires on the top of the transformer. Description of the drawings
[0013] Figure 1 It is a schematic structural diagram of a transformer structure with a half-wound primary outgoing line of the present utility model.
[0014] Figure 2 It is an exploded structural view of the present utility model after hiding the PCB board.
[0015] In Figures 1 to 2 the reference numerals include:
[0016] 1. PCB board; 2. Mounting base; 3. Magnetic core; 4. Copper foil; 5. Primary-side pin; 6. Secondary-side pin; 7. Positioning member; 8. Positioning groove; 9. Through groove; 10. E-shaped magnet; 11. Fixing hole. Specific embodiments
[0017] For the convenience of understanding by those skilled in the art, the present utility model will be further described below in conjunction with embodiments and drawings. The content mentioned in the embodiments does not limit the present utility model. The present utility model will be described in detail below with reference to the drawings.
[0018] A transformer structure with a half-wound primary outgoing line, as Figures 1 to 2As shown in the figure, it includes a PCB board 1, a mounting base 2 installed on the PCB board 1, and a magnetic core 3 installed on the mounting base 2. A copper foil 4 is provided on the PCB board 1, and the copper foil 4 is located below the mounting base 2. One side of the mounting base 2 is the primary side and is provided with a plurality of primary side pins 5, and the other side of the mounting base 2 is the secondary side and is provided with a plurality of secondary side pins 6. The primary side pins 5 and the secondary side pins 6 are respectively connected to the copper foil 4. The transformer structure of the half-wound primary outgoing line further includes a plurality of primary side coils and a plurality of secondary side coils. The primary side coils are wound around the outer periphery of the magnetic core 3, and both ends of the primary side coils are respectively electrically connected to different primary side pins 5. The same-named ends of the secondary side coils are connected to the secondary side pins 6. Starting from the same-named end, after the secondary side coils wind around the magnetic core 3 for several turns and return to the starting point, they continue to wind around the magnetic core 3 until the different-named ends of the secondary side coils are located on the primary side of the mounting base 2, and the different-named ends of the secondary side coils are then electrically connected to the secondary side pins 6 through the copper foil 4. Specifically, the structure of the present utility model is novel and ingeniously designed, so that the same-named ends and different-named ends of the secondary side coils are not on the same side of the mounting base 2, thereby obtaining non-integer turns, which can meet special voltage transformation requirements. At the same time, the structure of the half-wound main transformer of the present utility model is simple, and it will not increase the volume of the transformer while meeting special voltage transformation requirements. Further, the present utility model uses the same-named ends of the secondary side coils to be connected to the secondary side pins 6. Starting from the same-named end, after the secondary side coils wind around the magnetic core 3 for several turns and return to the starting point, they continue to wind around the magnetic core 3 until the different-named ends of the secondary side coils are located on the primary side of the mounting base 2, and the different-named ends of the secondary side coils are then electrically connected to the secondary side pins 6 through the copper foil 4, which simplifies the manufacturing method of the transformer and can avoid the problem of large leakage inductance caused by flying wires on the top of the transformer, and can omit the process of wrapping shielding around the transformer.
[0019] In the embodiment of the present application, the magnetic core 3 includes two E-shaped magnets 10 arranged opposite to each other. A positioning member 7 is provided on the top of the mounting base 2. The positioning member 7 is provided with a positioning groove 8, and a through groove 9 is provided through the middle of the positioning member 7. The positioning groove 8 communicates with the through groove 9. Specifically, the positioning groove 8 of the positioning member 7 can be used to position the E-shaped magnet 10, and the through groove 9 facilitates the middle part of the E-shaped magnet 10 to pass through for further limiting.
[0020] In the embodiment of the present application, fixing holes 11 are respectively provided at the corners of the PCB board 1. Specifically, under the above settings, the fixing holes 11 cooperate with external screws to facilitate fixing the PCB board 1 on external equipment.
[0021] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model is disclosed above in the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art, without departing from the scope of the technical solution of the present utility model, when making some changes or modifications using the above-disclosed technical content to equivalent embodiments of equivalent changes, as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the present utility model shall fall within the scope of the technical solution of the present utility model.
Claims
1. A transformer structure with a half-wound primary output, characterized in that: It comprises a PCB board, a mounting base mounted on the PCB board, and a magnetic core mounted on the mounting base, wherein the PCB board is provided with a copper foil, and the copper foil is located below the mounting base; one side of the mounting base is a primary side and is provided with a plurality of primary side pins, and the other side of the mounting base is a secondary side and is provided with a plurality of secondary side pins, and the primary side pins and the secondary side pins are respectively connected to the copper foil; The transformer structure with half-wound primary output also includes a plurality of primary coils and a plurality of secondary coils, wherein the primary coils surround the outer circumference of the magnetic core, and the two ends of the primary coils are electrically connected to different primary pins respectively; The like-named end of the secondary coil is connected to the secondary pin. With the like-named end as the starting point, the secondary coil rotates around the magnetic core several times and returns to the starting point, and then continues to rotate around the magnetic core until the opposite-named end of the secondary coil is located on the primary side of the mounting seat. The opposite-named end of the secondary coil is then electrically connected to the secondary pin through the copper foil.
2. A transformer structure with a half-wound primary output according to claim 1, characterized in that: A positioning piece is arranged on the top of the mounting seat, and a positioning groove is arranged on the positioning piece. A through groove is arranged through the middle of the positioning piece, and the positioning groove is communicated with the through groove.
3. A transformer structure with a half-wound primary output according to claim 1, characterized in that: The magnetic core includes two E-shaped magnets arranged opposite to each other.
4. A transformer structure with a half-wound primary output line according to claim 1, characterized in that: The corners of the PCB board are respectively provided with fixing holes.