Secondary winding PCB module and transformer with same
By adopting an integrated design of secondary winding PCB board modules and electronic components in the transformer, the heat dissipation and stability problems of the transformer when reducing its size are solved, realizing the integration and miniaturization of the transformer, and improving the stability and heat dissipation effect of the power supply.
Patent Information
- Application Number
- CN202520017279.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-03
AI Technical Summary
Existing transformers suffer from reduced heat dissipation when their size is reduced, which affects power stability. Furthermore, the secondary windings require electronic components to regulate current and voltage, resulting in a lack of integration and miniaturization.
The secondary winding PCB board module includes a metal layer winding in the first area and electronic components in the second area. The electronic components are used to control the current. The primary winding and secondary winding are stacked, combined with the iron core and through-hole structure, and the electronic components are integrated in the second area.
It improves the stability of current and voltage, reduces losses, realizes the integration and miniaturization of transformers, and enhances the stability and heat dissipation performance of power supplies.
Smart Images
Figure CN223743422U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transformers, and in particular to a secondary winding PCB board module and a transformer having the same. Background Technology
[0002] A transformer is a device that uses the principle of electromagnetic induction to change alternating current voltage. Its main components are the primary coil, the secondary coil, and the iron core (magnetic core). Its main functions include voltage transformation, current transformation, impedance transformation, isolation, and voltage stabilization (magnetic saturation transformer).
[0003] Existing primary and secondary coils are generally stacked together to achieve the desired power output. However, existing transformers have the following problems:
[0004] 1. When maintaining the same power, reducing its size will increase the density of the coil. As the density increases, the heat dissipation will decrease, thus affecting the stability of its power.
[0005] 2. Although existing technologies also use PCB boards as secondary windings, they are only used as a single secondary winding. In actual power supply applications, additional electronic components are required to regulate the current and voltage to achieve the desired technical effect. Utility Model Content
[0006] The main purpose of this utility model is to propose a secondary winding PCB board module and a transformer having the same, aiming to realize the moduleization of the transformer while integrating and miniaturizing it.
[0007] To achieve the above objectives, this utility model proposes a secondary winding PCB board module and a transformer having therein, comprising:
[0008] A PCB board, the PCB board comprising a first region and a second region;
[0009] A first through hole is provided in a first region, and at least one side wall of the first region is provided with a metal layer, wherein the metal layer is a secondary winding.
[0010] An electronic component, wherein the second region is located away from the secondary winding, the electronic component is disposed on at least one sidewall of the second region, and the electronic component is used to control the current passing through the secondary winding.
[0011] By setting the PCB board as a first area and a second area, electronic components can control the current of the secondary winding. The corresponding current travel is shorter, and the corresponding losses are reduced, thereby ensuring the stability of current and voltage, and thus ensuring the stability of the power supply or application product, effectively improving the stability of the power supply.
[0012] A transformer includes an iron core, a primary winding, and a secondary winding PCB board module as described above.
[0013] The primary winding and secondary winding PCB board modules are stacked sequentially. The primary winding is provided with a second through hole, and the iron core is provided with a core post. The first through hole and the second through hole are sleeved on the core post. The primary winding is stacked with the first region, and the second region is located away from the iron core.
[0014] Compared with existing technologies, this structure results in a significantly thinner secondary winding PCB board module for the same power output. Furthermore, when used as a power module, electronic components can be directly integrated into the second area, thereby reducing the need for subsequent electronic component installation on the main PCB board, resulting in a smaller travel distance and lower losses. Attached Figure Description
[0015] Figure 1 3D schematic diagram of the secondary winding PCB board module Figure 1 ;
[0016] Figure 2 3D schematic diagram of the secondary winding PCB board module Figure 2 ;
[0017] Figure 3 This is an exploded view of the present invention;
[0018] Figure 4 This is a cross-sectional view of the present invention;
[0019] Figure 5 This is a three-dimensional illustration of the present utility model. Figure 1 ;
[0020] Figure 6 This is a three-dimensional illustration of the present utility model. Figure 2 ;
[0021] Figure 7 This is the circuit diagram of the secondary winding PCB board.
[0022] Figure 8 This is a schematic diagram of the printed metal layer.
[0023] In the picture,
[0024] 1 represents the PCB board, 11 represents the first area, 12 represents the second area, 1a represents the metal layer, and 1b represents the electronic components.
[0025] 21 is the first pin, 22 is the second pin, and 3 is a surface mount inductor.
[0026] 41 is the primary winding, and 42 is the secondary winding PCB board module.
[0027] 5 represents the iron core, 50 represents the core post, 51 represents the first through hole, and 52 represents the second through hole.
[0028] 6 represents the insulating gasket, and 60 represents the duct clearance. Detailed Implementation
[0029] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0030] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.
[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0032] like Figures 1 to 8 As shown, a secondary winding PCB board module 42 and a transformer having therein include, comprising:
[0033] PCB board, the PCB board including a first region 11 and a second region 12;
[0034] A first through hole is provided in a first region 11, and at least one side wall of the first region 11 is provided with a metal layer 1a, wherein the metal layer 1a is a secondary winding.
[0035] Electronic component 1b, located in the second region 12 away from the secondary winding, is disposed on at least one sidewall of the second region 12, and is used to control the current passing through the secondary winding.
[0036] By setting the PCB board into a first region 11 and a second region 12, electronic component 1b can control the current of the secondary winding. The corresponding current travel is shorter, and the corresponding losses are reduced, thereby ensuring the stability of current and voltage, and thus ensuring the stability of the power supply or application product, effectively improving the stability of the power supply.
[0037] Specifically, the PCB board has a first pin 21 and a second pin 22 located in the second region 12. The first pin 21 and the second pin 22 allow the secondary winding to be directly connected to the main control board, thereby adjusting the current and voltage changes according to actual needs, and thus adjusting the power changes, effectively ensuring the stability of the components used.
[0038] In one embodiment, the first pin 21 and the second pin 22 serve as the output terminal and the input terminal, respectively.
[0039] The corresponding electronic component 1b can be equipped with detection or monitoring elements to obtain the working status of the module in a timely manner, and then adjust the working status between the modules through the control device.
[0040] Specifically, it can be understood that the secondary winding is the secondary side.
[0041] In this embodiment of the invention, the first pin 21 and the second pin 22 are located on different horizontal planes. The shorter pin can be soldered to a sub-board, which is then connected to the main board, further reducing the current travel and thus reducing losses and improving control stability.
[0042] In this embodiment of the present invention, at least one sidewall of the second region 12 is provided with a surface-mount inductor 3 (which is small in size and therefore directly integrated into the module in the power supply design). Existing power transformers, such as mobile phone chargers, computer chargers, and server chargers, generally use integrated large capacitors to achieve current filtering (for example, for a 3200W power supply, the capacitor needs to carry a current of 260A, so its size is also relatively large). By setting up a secondary winding PCB board module, multiple 40A-50A surface-mount inductors 3 can be used to shunt the current, thereby reducing the overall size of the power supply and achieving higher integration.
[0043] The first pin 21 and / or the second pin 22 are made of copper or aluminum or have a metal block 200 (which improves current throughput and heat dissipation), and extend to the middle of the second region 12.
[0044] The upper wall of the second region 12 is provided with a solder layer 201. This structure can effectively improve the heat dissipation effect of the secondary winding PCB board, and at the same time increase the conductive area.
[0045] Specifically, the electronic component 1b is provided in two sets, located on opposite sides of the second region 12. In actual testing, the electronic component 1b is provided in two sets, which can be arranged according to requirements. The electronic component 1b includes a rectifier module and a drive module for controlling it. The two sets are located on opposite sides of the second region 12, which effectively avoids the accumulation of electronic component 1b, and also makes the functional control more comprehensive and stable. It can effectively realize the modular production of electronic component 1b, improve assembly stability and assembly efficiency, such as... Figure 7 As shown.
[0046] In this embodiment of the invention, the metal layer 1a is a copper sheet, a ring of enameled wire, or a printed metal layer. Depending on the application scenario, the thickness can be adjusted according to the current and power requirements. For example, when used as a mobile phone charging power supply, the area and thickness of the metal layer can be reduced; when used in products such as servers, a larger area and thickness of the metal layer can be used to improve the power supply's operational stability.
[0047] A transformer includes an iron core 5, a primary winding 41, and the aforementioned secondary winding PCB board module.
[0048] The primary winding 41 and the secondary winding PCB board module are stacked in sequence. The primary winding 41 is provided with a second through hole. The iron core 5 is provided with a core post 50. The first through hole and the second through hole are sleeved on the core post 50. The primary winding 41 is stacked with the first region 11. The second region 12 is located away from the iron core 5.
[0049] Compared with existing technologies, this structure allows for a significantly thinner secondary winding PCB board module at the same power output. Furthermore, when used as a power module, electronic components 1b can be directly integrated into the second region 12, thereby reducing the installation of electronic components 1b on the subsequent main PCB board, resulting in a smaller travel distance and lower losses.
[0050] In this embodiment of the invention, the primary winding 41 is a coil or a primary PCB board, and the primary PCB board has a primary metal layer. When the number of layers of the PCB board can reach a predetermined value, the coil can be replaced with the primary PCB board, thereby further improving the modular design of the transformer. Of course, for some lower power transformers, the primary winding 41 can also be a primary PCB board, and a primary metal layer can be set in its structure. In this case, for existing high-power mobile phone chargers (e.g., 120W), its size can be further reduced.
[0051] Specifically, an insulating pad 6 is provided between the primary winding 41 and the secondary winding PCB board module 42. The pad creates an airflow gap 60 between the primary winding 41 and the secondary winding PCB board module 42, thereby effectively improving the heat dissipation of the transformer. Compared with the existing situation where the primary and secondary coils are stacked on each other and the heat dissipation is unstable, the pad does not affect the working state of the transformer. At the same time, the airflow gap 60 can effectively improve its heat dissipation and ensure the stability of operation. Under certain high temperature conditions, the coil and electronic component 1b will experience functional degradation (e.g., resistance value, voltage value, and current value) due to the instability.
[0052] In this embodiment of the invention, the insulating pad 6 has a block or sheet structure.
[0053] In one embodiment, the core 5 is symmetrically arranged (core column symmetrical). Of course, all the primary windings 41 and secondary windings can also be installed on a single core column.
[0054] The printed metal plate can be referenced. Figure 8 The ring is a printed metal layer, which can be spiral (not a single ring). Through a multi-layer PCB board, the printed metal layers are connected end to end, forming a coil, that is, the coil is integrated, and the input and output sections are also integrated.
[0055] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A secondary winding PCB board module, characterized in that, The application relates to a PCB board module. The PCB board comprises a first area and a second area; A first through hole is arranged in the first area, at least one side wall of the first area is provided with a metal layer, and the metal layer is a secondary winding; An electronic component is arranged in at least one side wall of the second area, and the electronic component is used for controlling the current passing through the secondary winding.
2. The secondary winding PCB board module of claim 1, wherein: The first pin and the second pin are arranged in different horizontal planes or the same horizontal plane.
3. The secondary winding PCB board module of claim 2, wherein: The first pin and / or the second pin are made of copper or aluminum, and the first pin and / or the second pin extend to the middle position of the second area. The upper end wall of the second area is provided with a solder layer.
4. The secondary winding PCB board module of claim 1, wherein: At least one side wall of the second area is provided with a patch inductor.
5. The secondary winding PCB board module of claim 1, wherein: The electronic component is provided with two groups of electronic components arranged on opposite sides of the second area.
6. The secondary winding PCB board module of claim 1, wherein: The metal layer is a copper sheet or a circular ring enameled wire group or a printed metal layer.
7. A transformer, characterized by The application further relates to a core, a primary winding and the secondary winding PCB board module. The primary winding and the secondary winding PCB board module are sequentially stacked, the primary winding is provided with a second through hole, the core is provided with a core column, the first through hole and the second through hole are sleeved on the core column, the primary winding is stacked with the first area, and the second area is away from the position of the core.
8. The transformer of claim 7, wherein: The primary winding is a coil or a primary PCB board, and the primary PCB board is provided with a primary metal layer.
9. The transformer of claim 7, wherein: An insulating gasket is arranged between the primary winding and the secondary winding PCB board module, and the gasket generates an air duct gap between the primary winding and the secondary winding PCB board module.
10. The transformer of claim 9, wherein: The insulating gasket is in a block or sheet structure.