Bidirectional staggered coupling inductor
By adopting an interlaced and parallel topology in the inductor and setting air gap, the problem of large current core saturation is solved, and a small volume and low loss inductor is realized, which can withstand greater saturation current and realize bidirectional flow of energy.
Patent Information
- Application Number
- CN202421914601.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-07
AI Technical Summary
How to solve the problem of large current core saturation while ensuring small volume and low loss has become a problem that inductors need to solve urgently.
The staggered and parallel topology and the setting of air gaps on both sides of the core reduce the magnetic permeability of the core, so that the inductor can withstand greater saturation current and realize bidirectional flow of energy.
Effectively reduce current ripple, reduce losses, improve the inductor's ability to withstand saturated current, and achieve accurate bidirectional energy flow.
Smart Images
Figure CN222914536U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of inductors, and particularly relates to a bidirectional interleaved coupled inductor. Background Technique
[0002] The statements in this part only provide background technical information related to the utility model, and do not necessarily constitute prior art.
[0003] An inductor, also called a choke, is a component that can store and release energy. When the coil is energized, a reverse magnetic field is generated, thereby suppressing the passage of current in the coil and realizing functions such as filtering. Traditional inductors are usually set as a single winding, which is wound with selected wire on a bobbin and then a magnetic core is installed. Usually, the volume is relatively large; the inductor wound with flat wire can greatly reduce the volume of the device.
[0004] As the inventor understands, a dual-phase interleaved coupled inductor composed of two or more inductors combined by a specific interleaved coupling method can make the inductors affect each other under the action of the electromagnetic field through the coupling method, changing the working characteristics of the inductors themselves; that is, when current flows through one of the inductors, a magnetic field will be generated around the inductor, and the generated magnetic field will act on another inductor, thereby affecting the changes in its current and voltage; solving the problems of large volume and large loss of traditional inductors. However, how to solve the problem of magnetic core saturation under the premise of ensuring small volume and low loss has become a difficult problem that needs to be solved urgently for inductors. Summary of the Utility Model
[0005] To solve the above problems, the utility model proposes a bidirectional interleaved coupled inductor, which adopts an interleaved parallel topological structure to effectively reduce the current ripple and loss; through the setting of air gaps on both sides of the magnetic core, the magnetic permeability of the magnetic core itself is effectively reduced, so that the inductor can withstand a larger saturation current and accurately realize the bidirectional flow of energy.
[0006] According to some embodiments, the solution of the utility model provides a bidirectional interleaved coupled inductor, which adopts the following technical scheme:
[0007] A bidirectional interleaved coupled inductor includes a first magnetic core, a second magnetic core, and a first winding and a second winding disposed between the first magnetic core and the second magnetic core; wherein, a first magnetic core middle post and a second magnetic core middle post with the same structure are disposed on the first magnetic core, and a third magnetic core middle post and a fourth magnetic core middle post with the same structure are disposed on the second magnetic core; the first winding is sleeved on the first magnetic core middle post and the third magnetic core middle post, and the second winding is sleeved on the second magnetic core middle post and the fourth magnetic core middle post; both the first winding and the second winding are provided with two leads, the leads of the first winding and the leads of the second winding are symmetrically arranged, and the winding directions of the coils in the first winding and the coils in the second winding are the same.
[0008] As a further technical limitation, grooves are formed on both the first magnetic core middle post and the second magnetic core middle post.
[0009] Furthermore, protrusions adapted to the grooves are disposed on both the third magnetic core middle post and the fourth magnetic core middle post.
[0010] As a further technical limitation, a bidirectional interleaved coupled inductor further includes a cover plate, and a first connecting rod and a second connecting rod are symmetrically and fixedly disposed on one side of the cover plate.
[0011] Furthermore, a first buckle and a second buckle are respectively disposed at the ends of the first connecting rod and the second connecting rod.
[0012] Furthermore, a first buckle groove and a second buckle groove matching the first buckle and the second buckle are respectively disposed on one side of the first magnetic core and the second magnetic core.
[0013] As a further technical limitation, both the first magnetic core and the second magnetic core adopt U-shaped magnetic cores.
[0014] As a further technical limitation, both the first winding and the second winding adopt flat coils.
[0015] As a further technical limitation, a first side post and a second side post are disposed on the first magnetic core, a first air gap is disposed between the first side post and the first magnetic core middle post, and a second air gap is disposed between the second side post and the second magnetic core middle post.
[0016] As a further technical limitation, a third side post and a fourth side post are disposed on the second magnetic core, a third air gap is disposed between the third side post and the third magnetic core middle post, and a fourth air gap is disposed between the fourth side post and the fourth magnetic core middle post.
[0017] Compared with the prior art, the beneficial effects of the present utility model are:
[0018] In the present utility model, the first winding and the second winding are respectively sleeved on the middle columns of the first magnetic core and the third magnetic core, as well as on the middle columns of the second magnetic core and the fourth magnetic core. At the same time, air gaps are provided on both sides of the first magnetic core and the second magnetic core. While reducing the magnetic permeability of the first magnetic core and the second magnetic core, the inductor can withstand a larger saturation current; meanwhile, bidirectional flow of inductive energy can be achieved.
[0019] The present utility model adopts a staggered parallel topological structure, effectively reducing current ripple and losses; through the setting of air gaps on both sides of the magnetic core, the magnetic permeability of the magnetic core itself is effectively reduced, enabling the inductor to withstand a larger saturation current and accurately achieving bidirectional flow of energy. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The schematic diagrams in the specification forming a part of the present utility model are used to provide a further understanding of the present utility model. The illustrative embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model.
[0021] Figure 1 is an overall structural schematic diagram of a bidirectional interleaved coupled inductor in an embodiment of the present utility model;
[0022] Figure 2 is another overall structural schematic diagram of a bidirectional interleaved coupled inductor in an embodiment of the present utility model;
[0023] Figure 3 is an exploded structural schematic diagram of a bidirectional interleaved coupled inductor in an embodiment of the present utility model;
[0024] Figure 4 is a structural schematic diagram of a cover plate in an embodiment of the present utility model;
[0025] Figure 5 is a structural schematic diagram of a first magnetic core in an embodiment of the present utility model;
[0026] Figure 6 is a structural schematic diagram of a second magnetic core in an embodiment of the present utility model;
[0027] Figure 7 is a structural schematic diagram of a first winding and a second winding in an embodiment of the present utility model;
[0028] Among them, 1. Cover plate, 11. First connecting rod, 111. First buckle, 12. Second connecting rod, 121. Second buckle, 2. First magnetic core, 21. First magnetic core middle column, 22. Second magnetic core middle column, 23. Groove, 24. First buckle groove, 25. First side column, 26. Second side column, 27. First air gap, 28. Second air gap, 3. Second magnetic core, 31. Third magnetic core middle column, 32. Fourth magnetic core middle column, 33. Protrusion, 34. Second buckle groove, 35. Third side column, 36. Fourth side column, 37. Third air gap, 38. Fourth air gap, 4. First winding, 41. First winding lead-out leg, 5. Second winding, 51. Second winding lead-out leg. Detailed implementation mode
[0029] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.
[0030] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further descriptions of the present utility model. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.
[0031] It should be noted that the terms used herein are only for describing specific implementation modes and are not intended to limit the exemplary implementation modes of the present utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0032] In the present utility model, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only relationship terms determined for the convenience of describing the structural relationship of each component or element of the present utility model and do not specifically refer to any component or element in the present utility model and should not be construed as a limitation to the present utility model.
[0033] In the present utility model, terms such as "fixed connection", "connected", "connected" should be understood in a broad sense, indicating that it can be a fixed connection, an integral connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate medium. For those related scientific research or technical personnel in the field, the specific meaning of the above terms in the present utility model can be determined according to specific circumstances and should not be construed as a limitation to the present utility model.
[0034] Embodiment
[0035] Embodiment 1 of the present utility model introduces a bidirectional interleaved coupled inductor.
[0036] As Figure 1 、 Figure 2 and Figure 3 shown, the bidirectional interleaved coupled inductor includes a cover plate 1, a first magnetic core 2, a second magnetic core 3, a first winding 4 and a second winding 5.
[0037] In this embodiment, both the first magnetic core 2 and the second magnetic core 3 are U-shaped magnetic cores.
[0038] The structure of the cover plate 1 is as Figure 4 shown, and includes a first connecting rod 11 and a second connecting rod 12 fixed to the inner side of the cover plate 1. Among them, the ends of the first connecting rod 11 and the second connecting rod 12 are respectively provided with a first buckle 111 and a second buckle 121.
[0039] It should be noted that the structures of the first connecting rod 11 and the second connecting rod 12 are arranged in a symmetrical structure.
[0040] The structure of the first magnetic core 2 is as Figure 5 shown. The first magnetic core 2 is provided with a first magnetic core middle column 21, a second magnetic core middle column 22, a first side column 25 and a second side column 26; a first air gap 27 is provided between the first side column 25 and the first magnetic core middle column 21, and a second air gap 28 is provided between the second side column 26 and the second magnetic core middle column 22; grooves 23 are opened on both the first magnetic core middle column 21 and the second magnetic core middle column 22; a first buckle groove 24 adapted to the first buckle 111 is opened at the middle position on one side of the first magnetic core 2.
[0041] It should be noted that the first magnetic core middle column 21, the first air gap 27 and the first side column 25 are arranged in a symmetrical structure with the second magnetic core middle column 22, the second air gap 28 and the second side column 26.
[0042] The structure of the second magnetic core 3 is as Figure 6 shown. The second magnetic core 3 is provided with a third magnetic core middle column 31, a fourth magnetic core middle column 32, a third side column 35 and a fourth side column 36; a third air gap 37 is provided between the third side column 35 and the third magnetic core middle column 31, and a fourth air gap 38 is provided between the fourth side column 36 and the fourth magnetic core middle column 32; protrusions 33 adapted to the grooves 23 are provided on both the third magnetic core middle column 31 and the fourth magnetic core middle column 32; a second buckle groove 34 adapted to the second buckle 121 is opened at the middle position on one side of the second magnetic core 3.
[0043] It should be noted that the third magnetic core middle column 31, the third air gap 37 and the third side column 35 are arranged in a symmetrical structure with the fourth magnetic core middle column 32, the fourth air gap 38 and the fourth side column 36.
[0044] It should be noted that by providing the groove 23 and the protrusion 33, the fixed connection between the first magnetic core middle column 21 and the third magnetic core middle column 31, as well as the second magnetic core middle column 22 and the fourth magnetic core middle column 32, is assisted and realized.
[0045] The structures of the first winding 4 and the second winding 5 are as Figure 7 shown. The first winding 4 and the second winding 5 are symmetrically distributed in structure. The first winding 4 is sleeved on the first magnetic core middle column 21 and the third magnetic core middle column 31, and the second winding 5 is sleeved on the second magnetic core middle column 22 and the fourth magnetic core middle column 32. Two first winding leads 41 are provided on the first winding 4, and two second winding leads 51 are provided on the second winding 5.
[0046] It should be noted that the two first winding leads 41 are arranged on the same side, and the two second winding leads 51 are arranged on the same side; and the two first winding leads 41 and the two second winding leads 51 are symmetrically structured.
[0047] In this embodiment, both the first winding 4 and the second winding 5 adopt flat coils, and the winding directions of the coils in the first winding 4 and the second winding 5 are the same.
[0048] Taking the first winding 4 as an example in this embodiment, the following is an expanded introduction:
[0049] After the first winding 4 is wound four times in a flat coil flat winding manner, both ends of the flat coil lead out on the same side, that is, the two first winding leads 41 are both arranged on the same side. The four sides of the two first winding leads 41 are peeled and tinned. After winding is completed, the two ends of the wound first winding 4 are respectively sleeved on the first magnetic core middle column 21 and the third magnetic core middle column 31. Under the action of the groove 23 and the protrusion 33, the first magnetic core middle column 21 and the third magnetic core middle column 31 can be fixedly connected together, and then the flat coil and the magnetic core are fixed by gluing.
[0050] It should be noted that the setting of the second winding 5 is the same as that of the first winding 4, and this embodiment will not elaborate further here.
[0051] After the first winding 4, the second winding 5, the first magnetic core 2 and the second magnetic core 3 are fixedly connected, the cover plate 1 is clamped on the first magnetic core 2 and the second magnetic core 3. The first connecting rod 11 and the second connecting rod 12 respectively penetrate through the first magnetic core middle column 21 and the second magnetic core middle column 22, as well as the third magnetic core middle column 31 and the fourth magnetic core middle column 32. Under the action of the first buckle 111 and the first buckle groove 24, as well as the second buckle 121 and the second buckle groove 34, the fixed connection of the entire inductor is realized.
[0052] In this embodiment, the first winding and the second winding are respectively sleeved on the middle columns of the first magnetic core and the third magnetic core, as well as on the middle columns of the second magnetic core and the fourth magnetic core. At the same time, air gaps are provided on both sides of the first magnetic core and the second magnetic core. While reducing the magnetic permeability of the first magnetic core and the second magnetic core, the inductor can withstand a larger saturation current; meanwhile, bidirectional flow of inductive energy can be achieved.
[0053] This embodiment adopts a staggered parallel topology structure, effectively reducing current ripple and losses; through the setting of air gaps on both sides of the magnetic core, the magnetic permeability of the magnetic core itself is effectively reduced, enabling the inductor to withstand a larger saturation current and accurately achieving bidirectional flow of energy.
[0054] This embodiment adopts a winding design of a flat coil, which is suitable for high-current environments. In view of the characteristics of the flat and low-height winding, it meets the requirements of low height and small volume of the finished product. There is no skeleton design, and the heat dissipation effect is better; at the same time, the winding and processing of the flat coil can be automated. The main process steps of device processing are dispensing and assembly, without other complex production processes, which makes the processing of the device easier, more convenient, and has higher production efficiency.
[0055] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
[0056] Although the specific implementation manners of the present invention have been described above in conjunction with the accompanying drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that, based on the technical solutions of the present invention, various modifications or deformations that can be made without creative efforts by those skilled in the art are still within the protection scope of the present invention.
Claims
1. A bidirectional interleaved coupled inductor, characterized in that: It includes a first magnetic core, a second magnetic core, and a first winding and a second winding arranged between the first magnetic core and the second magnetic core; wherein the first magnetic core is provided with a first magnetic core center column and a second magnetic core center column with the same structure, and the second magnetic core is provided with a third magnetic core center column and a fourth magnetic core center column with the same structure; the first winding is sleeved on the first magnetic core center column and the third magnetic core center column, and the second winding is sleeved on the second magnetic core center column and the fourth magnetic core center column; the first winding and the second winding are both provided with two pins, the pins of the first winding and the pins of the second winding are symmetrically arranged, and the coils in the first winding and the coils in the second winding are in the same winding direction.
2. A bidirectional interleaved coupled inductor as claimed in claim 1, characterized in that: The first magnetic core center column and the second magnetic core center column are both provided with grooves.
3. A bidirectional interleaved coupled inductor as claimed in claim 2, characterized in that: The third magnetic core center column and the fourth magnetic core center column are both provided with protrusions matched with the grooves.
4. A bidirectional interleaved coupled inductor as claimed in claim 1, characterized in that: It also includes a cover plate, on one side of which a first connecting rod and a second connecting rod are symmetrically fixedly arranged.
5. A bidirectional interleaved coupled inductor as claimed in claim 4, characterized in that: The ends of the first connecting rod and the second connecting rod are respectively provided with a first buckle and a second buckle.
6. A bidirectional interleaved coupled inductor as claimed in claim 5, characterized in that: A first buckle groove and a second buckle groove matching with the first buckle and the second buckle are respectively provided on one side of the first magnetic core and the second magnetic core.
7. A bidirectional interleaved coupled inductor as claimed in claim 1, characterized in that: The first magnetic core and the second magnetic core are both U-shaped magnetic cores.
8. A bidirectional interleaved coupled inductor as claimed in claim 1, characterized in that: The first winding and the second winding are both flat coils.
9. A bidirectional interleaved coupled inductor as claimed in claim 1, characterized in that: The first magnetic core is provided with a first side column and a second side column, a first air gap is provided between the first side column and the first magnetic core center column, and a second air gap is provided between the second side column and the second magnetic core center column.
10. A bidirectional interleaved coupled inductor as claimed in claim 1, characterized in that: The second magnetic core is provided with a third side column and a fourth side column, a third air gap is provided between the third side column and the third magnetic core center column, and a fourth air gap is provided between the fourth side column and the fourth magnetic core center column.