Rectifying winding of transformer, transformer and power supply module
By adopting a rectified winding design with a multi-layer circuit board structure in the transformer, interlaced and stacked parallel secondary windings, and using magnetic coupling of the magnetic core, the problem of increased winding heat generation is solved, achieving higher power density and better stability sex.
Patent Information
- Application Number
- CN202421181628.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-28
AI Technical Summary
Increased heating of the transformer winding leads to limited increase in power density, affecting safety and stability.
The rectified winding design adopts a multi-layer circuit board structure. The primary and secondary windings and secondary windings are staggered and stacked, and the bus bar is used as the top and bottom winding plates to connect the secondary windings in parallel, and the through holes and magnetic blocks of the magnetic core are added to achieve the Magnetic coupling reduces current density and thermal resistance.
It effectively reduces the heating of the rectifier winding, improves the power density of the transformer, and ensures safety and stability.
Smart Images
Figure CN222354896U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of printed circuit boards, in particular to a rectifier winding of a transformer, a transformer and a power supply module. Background Art
[0002] The power module is based on a transformer (such as a DC / DC transformer) and can convert the input power signal into the required stable power output. In some fields that have strict requirements on power modules (such as aviation, aerospace, and shipbuilding), there are very high requirements for the power density of the transformer. However, the increase in the power density of the transformer also means that the heating of the winding increases, which in turn affects the safety and stability of the transformer. In other words, excessive heating of the winding is a factor that restricts the increase in the power density of the transformer.
[0003] The above contents are only used to assist in understanding the technical solution of the present utility model and do not constitute an admission that the above contents are prior art. Utility Model Content
[0004] The utility model provides a rectifier winding of a transformer, a transformer and a power module, aiming to reduce the heat generation of the transformer winding and ensure the safety and stability when the power density of the transformer is improved.
[0005] To achieve the above-mentioned purpose, the utility model proposes a rectifier winding of a transformer, wherein the main board of the transformer is a multi-layer circuit board, and the main board is provided with a rectifier winding; and in the core of the rectifier winding, the primary winding and the secondary winding are alternately stacked;
[0006] The top layer of the rectifier winding core is provided with a first bus bar as a top winding plate, and the first bus bar is connected in parallel with half of the secondary winding; the bottom layer of the rectifier winding core is provided with a second bus bar as a bottom winding plate, and the second bus bar is connected in parallel with the other half of the secondary winding;
[0007] The rectifier winding core, the first bus bar and the second bus bar are all provided with corresponding through holes, a first magnetic core is provided on the first bus bar and a second magnetic core is provided under the second bus bar; and the protruding magnetic strip in the first magnetic core passes through the through hole and contacts the second magnetic core.
[0008] Optionally, a through slot is further provided on the periphery of the rectifier winding core, and a magnetic block adapted to the through slot is further provided in the first magnetic core, and the magnetic block passes through the through slot and contacts with the second magnetic core.
[0009] Optionally, the second magnetic core is a rectangular magnetic plate.
[0010] Optionally, the first bus bar and half of the secondary winding are connected in parallel between the voltage output end of the transformer and the ground; the second bus bar and the other half of the secondary winding are connected in parallel between the voltage output end of the transformer and the ground.
[0011] Optionally, the first bus bar and half of the secondary winding are grounded via a first switch module; the second bus bar and the other half of the secondary winding are grounded via a second switch module.
[0012] Optionally, a plurality of MOS tubes are arranged in parallel in the first switch module; and / or a plurality of MOS tubes are arranged in parallel in the second switch module.
[0013] Optionally, a capacitor is further provided between the voltage output terminal and the ground line.
[0014] The utility model further provides a transformer, in which the rectifier winding of the transformer as described above is arranged.
[0015] The utility model further provides a power module, in which the transformer as described above is arranged.
[0016] The beneficial effect of the technical solution of the utility model is that by using the busbar as the winding plate of the top and bottom layers of the rectifier winding and using it as a part of the secondary winding, the current density of the rectifier winding is reduced, thereby reducing the heating of the rectifier winding, and reducing the thermal resistance between layers of the multi-layer circuit board, and the heat dissipation performance is better. By reducing the heating of the rectifier winding, the power density of the transformer can be made higher, and the safety and stability of the transformer can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a structural exploded view of the rectifier winding of the utility model on the main board of the transformer;
[0018] Figure 2 The utility model is a circuit diagram of the winding-related structure of the transformer.
[0019] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the scheme in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0022] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.
[0023] In addition, if the description of "first", "second", etc. is involved in the utility model, it is only used for descriptive purposes (such as for distinguishing the same or similar elements), and cannot be understood as indicating or implying its relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0024] The utility model provides a rectifier winding of a transformer, referring to Figure 1 and Figure 2 The main board of the transformer is a multi-layer circuit board, on which a rectifier winding is arranged; and in the core of the rectifier winding, the primary winding and the secondary winding are alternately stacked;
[0025] The top layer of the rectifier winding core is provided with a first bus bar as a top winding plate, and the first bus bar is connected in parallel with half of the secondary winding; the bottom layer of the rectifier winding core is provided with a second bus bar as a bottom winding plate, and the second bus bar is connected in parallel with the other half of the secondary winding;
[0026] The rectifier winding core, the first bus bar and the second bus bar are all provided with corresponding through holes, a first magnetic core is provided on the first bus bar and a second magnetic core is provided under the second bus bar; and the protruding magnetic strip in the first magnetic core passes through the through hole and contacts the second magnetic core.
[0027] In this embodiment, the mainboard of the transformer adopts a multi-layer circuit board structure, which can improve the compactness of the transformer and the rectifier winding arranged on the mainboard, and help improve the power density. Among them, the multi-layer circuit board can be a thick copper circuit board.
[0028] The rectifier winding is arranged on the main board of the transformer, and its core is composed of the corresponding copper foil in each layer of the circuit board (that is, the copper foil at the location where the winding core is arranged, and one layer of copper foil can form a winding), and the rectifier winding core includes multiple primary windings and multiple secondary windings. In the rectifier winding core, the primary winding and the secondary winding are arranged in an alternating and stacked manner. The rectifier winding core adopts an alternating and stacked design, which makes the overall structure more compact, can achieve higher power density in a limited space, and is suitable for application scenarios with small volume requirements.
[0029] It should be understood that, in addition to the rectifier winding, the main board of the transformer also includes other necessary components of the transformer, such as other components used in conjunction with the rectifier winding.
[0030] The top layer of the rectifier winding core is provided with a first bus bar as a top winding plate, and the first bus bar is connected in parallel with half of the secondary windings, so that the first bus bar is also equivalent to being used as one of the secondary windings; the bottom layer of the rectifier winding core is provided with a second bus bar as a bottom winding plate, and the second bus bar is connected in parallel with the other half of the secondary windings, so that the second bus bar is also equivalent to being used as one of the secondary windings.
[0031] Among them, the bus bar (also known as a laminated bus bar) is a power module electrical connection component with a multi-layer laminated structure, which can connect the power distribution points of multiple circuits.
[0032] For example, Figure 2 As shown, taking the original number of secondary windings of the rectifier winding core as 6 as an example (the number of primary windings is also 6 at this time; the multi-layer circuit board structure is composed of 12 layers of circuit boards, and one winding can be set on each layer), 3 secondary windings are connected in parallel with the first bus bar, and the other 3 secondary windings are connected in parallel with the second bus bar (two bus bars plus the original 6 secondary windings can increase the number of secondary windings to 8 in the 12-layer circuit board).
[0033] Among them, the half of the secondary winding connected in parallel with the first bus bar and the other half of the secondary winding connected in parallel with the second bus bar are also arranged in an alternate and stacked manner.
[0034] In this embodiment, the busbar is used as a secondary winding, which can effectively disperse the current, that is, reduce the current density, thereby reducing the heat on the winding plate, so that the power density of the transformer can be made higher. That is, by arranging the first and second busbars on the top and bottom layers respectively, and connecting them in parallel with the secondary winding, the first busbar and the second busbar are actually used as a secondary winding respectively. Such a design increases the reusability of the rectifier winding, fully utilizes the structural space of the transformer, and improves the overall efficiency and power density of the transformer. This ingenious design ensures that the transformer achieves higher power output in a limited space while maintaining good thermal management and stability.
[0035] In this way, for the same number of layers of circuit boards, the current density of the rectifier winding is smaller and the power density of the transformer is higher. In addition, the first bus bar and the second bus bar are also used as a secondary winding, which can reduce the interlayer thermal resistance of the multi-layer circuit board and improve the heat dissipation performance. This ensures that the transformer achieves more efficient power output within a limited space and maintains good stability and reliability.
[0036] At the same time, corresponding through holes are provided in the rectifier winding core, the first bus bar and the second bus bar (the specifications of the through holes in the three can be consistent or inconsistent; for example, the through hole diameters of the first bus bar and the second bus bar can be larger than the through hole diameter of the rectifier winding core to facilitate assembly), a first magnetic core is provided on the first bus bar, and a second magnetic core is provided under the second bus bar; a raised magnetic strip is provided in the first magnetic core, which can pass through the through holes in the first bus bar, the rectifier winding core and the second bus bar; when the first magnetic core and the second magnetic core are used in combination with the first bus bar, the rectifier winding core and the second bus bar, the magnetic strip on the first magnetic core passes through the through holes in the first bus bar, the rectifier winding core and the second bus bar in turn to contact the second magnetic core, and in this way, the first magnetic core and the second magnetic core can achieve mutual magnetic attraction.
[0037] This design is to achieve effective magnetic coupling between the first magnetic core and the second magnetic core. By setting through holes in the first bus bar, the rectifier winding core, and the second bus bar, and designing a raised magnetic strip in the first magnetic core, it is possible to ensure good docking and contact between the first magnetic core and the second magnetic core, and to adsorb each other. This design helps to maximize the transfer of magnetic energy and ensure the efficient operation of the rectifier winding. Moreover, by optimizing the magnetic circuit, the efficiency and performance of the transformer can be improved, while reducing energy loss and heat generation, making the transformer more stable and reliable.
[0038] In one embodiment, by using busbars as winding plates at the top and bottom layers of the rectifier winding and using them as part of the secondary winding, the current density of the rectifier winding is reduced, thereby reducing the heat generation of the rectifier winding, and reducing the thermal resistance between layers of the multi-layer circuit board, and the heat dissipation performance is better. By reducing the heat generation of the rectifier winding, the power density of the transformer can be made higher, and the safety and stability of the transformer can be guaranteed.
[0039] In one embodiment, based on the above embodiment, referring to Figure 1 A through slot is also provided on the periphery of the rectifier winding core, and a magnetic block adapted to the through slot is also provided in the first magnetic core, and the magnetic block passes through the through slot and contacts with the second magnetic core.
[0040] In this embodiment, a through slot is provided on the periphery of the rectifier winding core, and a magnetic block adapted to the through slot is designed in the first magnetic core. When the first magnetic core and the second magnetic core are used in combination with the rectifier winding core, the magnetic block on the first magnetic core passes through the through slot and contacts the second magnetic core, and is magnetically attracted to each other. The provision of the through slot provides an additional contact area, so that the magnetic block contacts the second magnetic core more closely, thereby increasing the transfer efficiency of magnetic energy.
[0041] This not only further enhances the magnetic coupling between the first magnetic core and the second magnetic core, but also allows the first bus bar, the rectifier winding core and the second bus bar to be clamped in the middle by the first magnetic core and the second magnetic core, thereby simplifying the assembly process and facilitating the assembly and fixation of the magnetic core and the rectifier winding core, the first bus bar and the second bus bar.
[0042] Optionally, the second magnetic core is a rectangular magnetic plate.
[0043] In one embodiment, based on the above embodiment, referring to Figure 2 The first bus bar and half of the secondary winding are connected in parallel between the voltage output terminal Vo of the transformer and the ground wire GND; the second bus bar and the other half of the secondary winding are connected in parallel between the voltage output terminal Vo of the transformer and the ground wire GND.
[0044] In this embodiment, the first bus bar is used as one of the secondary windings, and the first bus bar and half of the secondary windings are connected in parallel between the voltage output terminal Vo of the transformer and the ground wire GND. This configuration divides the current into the first bus bar and half of the secondary windings, thereby effectively reducing the path of the current, reducing the resistance of the system, and improving the efficiency of current transmission.
[0045] The second bus bar is used as one of the secondary windings, and the second bus bar and the other half of the secondary winding are connected in parallel between the voltage output terminal Vo of the transformer and the ground wire GND. This configuration divides the current into the second bus bar and the other half of the secondary winding, thereby effectively reducing the path of the current, reducing the resistance of the system, and improving the efficiency of current transmission.
[0046] This parallel design also helps to ensure the voltage stability and reliability between the voltage output terminal Vo and the ground line GND. Such a solution can optimize the performance of the transformer and improve its working efficiency.
[0047] In one embodiment, based on the above embodiment, referring to Figure 2 The first bus bar and half of the secondary winding are grounded through a first switch module; the second bus bar and the other half of the secondary winding are grounded through a second switch module.
[0048] In this embodiment, the first bus bar and half of the secondary winding connected in parallel with the first bus bar are defined as a first secondary module, wherein the first secondary module is connected to the ground wire GND via the first switch module, and based on the first switch module, the first secondary module can be controlled to be enabled or not.
[0049] Optionally, the second bus bar and the other half of the secondary winding connected in parallel with the second bus bar are defined as a second secondary module, wherein the second secondary module is connected to the ground wire GND via a second switch module, and based on the second switch module, the second secondary module can be controlled to be enabled or not.
[0050] Optionally, a plurality of MOS tubes (not shown in the figure) are arranged in parallel in the first switch module; and / or a plurality of MOS tubes (not shown in the figure) are arranged in parallel in the second switch module.
[0051] Among them, the MOS tube can be controlled and driven by a corresponding controller or driving circuit (not shown in the figure). The controller or driving circuit can provide an appropriate voltage signal to put the MOS tube in the required on or off state, thereby realizing the control of the circuit. This design can effectively realize the precise control of the MOS tube so that it can play a specified function in the circuit.
[0052] In one embodiment, based on the above embodiment, referring to Figure 2 A capacitor C is also provided between the voltage output terminal Vo and the ground line GND.
[0053] In this embodiment, by arranging the capacitor C between the voltage output terminal Vo and the ground line GND, high-frequency noise or fluctuation in the circuit can be filtered out, thereby ensuring the stability and purity of the output voltage.
[0054] In some cases, there will be instantaneous fluctuations or spikes in voltage in the circuit, which may cause damage to the connected equipment. Capacitor C can help absorb these fluctuations and make the output voltage more stable.
[0055] Moreover, capacitor C can compensate the power factor in the circuit, making the circuit more efficient and helping to provide a stable power supply.
[0056] In addition, capacitor C can provide overload protection to some extent, absorbing overcurrent in the circuit and protecting connected devices from damage.
[0057] The utility model further proposes a transformer, which includes the rectifier winding of the transformer described in the above embodiment. The specific structure of the rectifier winding of the transformer refers to the above embodiment. Since the transformer adopts all the technical solutions of all the above embodiments, it has at least all the technical effects brought by the technical solutions of the above embodiments, which will not be described one by one here.
[0058] The utility model further proposes a power supply module, which includes the transformer and rectifier winding described in the above embodiments. The specific structure of the rectifier winding of the transformer refers to the above embodiments. Since the power supply module adopts all the technical solutions of all the above embodiments, it has at least all the technical effects brought by the technical solutions of the above embodiments, which will not be described one by one here.
[0059] The above description is only a partial or preferred embodiment of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.
Claims
1. A rectifier winding of a transformer, characterized in that: The main board of the transformer is a multi-layer circuit board, on which a rectifier winding is arranged; and in the core of the rectifier winding, the primary winding and the secondary winding are alternately stacked; The top layer of the rectifier winding core is provided with a first bus bar as a top winding plate, and the first bus bar is connected in parallel with half of the secondary winding; the bottom layer of the rectifier winding core is provided with a second bus bar as a bottom winding plate, and the second bus bar is connected in parallel with the other half of the secondary winding; The rectifier winding core, the first bus bar and the second bus bar are all provided with corresponding through holes, a first magnetic core is provided on the first bus bar and a second magnetic core is provided under the second bus bar; and the protruding magnetic strip in the first magnetic core passes through the through hole and contacts the second magnetic core.
2. The rectifier winding of the transformer according to claim 1, characterized in that: A through slot is also provided on the periphery of the rectifier winding core, and a magnetic block adapted to the through slot is also provided in the first magnetic core, and the magnetic block passes through the through slot and contacts with the second magnetic core.
3. The rectifier winding of the transformer according to claim 1 or 2, characterized in that: The second magnetic core is a rectangular magnetic plate.
4. The rectifier winding of the transformer according to claim 1, characterized in that: The first bus bar and half of the secondary winding are connected in parallel between the voltage output end of the transformer and the ground; the second bus bar and the other half of the secondary winding are connected in parallel between the voltage output end of the transformer and the ground.
5. The rectifier winding of the transformer according to claim 4, characterized in that: The first bus bar and half of the secondary winding are grounded via a first switch module; the second bus bar and the other half of the secondary winding are grounded via a second switch module.
6. The rectifier winding of the transformer according to claim 5, characterized in that: The first switch module includes a plurality of MOS transistors connected in parallel; and / or the second switch module includes a plurality of MOS transistors connected in parallel.
7. The rectifier winding of the transformer according to any one of claims 4 to 6, characterized in that: A capacitor is also arranged between the voltage output terminal and the ground line.
8. A transformer, characterized in that: The transformer is provided with a rectifier winding of the transformer as claimed in any one of claims 1 to 7.
9. A power module, characterized in that: The power module is provided with the transformer as claimed in claim 8.