Assembled common mode inductor
By setting up splicing coils on the fully closed magnetic circuit core and fixedly connected through the base and splicing line rows, the existing common mode inductor volume and impedance are solved, and common modes with large current, small volume and large inductance are realized inductance.
Patent Information
- Application Number
- CN202421080353.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-16
AI Technical Summary
The existing ultra-large current common mode inductors have shortcomings in volume and impedance, and cannot achieve the requirements of high inductance, high impedance and small volume at the same time.
Adopt a combined structure of fully closed magnetic circuit core, spliced coil and base, the spliced coil is set on the fully closed magnetic circuit core, and a fixed connection is achieved through the base and spliced wire row to form a large current, small volume, and large induction value. common mode inductor.
A common mode inductor with large current, small volume and large inductance value is realized, and the overcurrent capability and power density of the inductor are improved.
Smart Images
Figure CN222440326U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of power electronic devices, and in particular relates to an assembled common-mode inductor. Background Art
[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.
[0003] Common mode inductors (Common mode Choke), also called common mode chokes, are often used in computer switching power supplies to filter common mode electromagnetic interference signals; in board design, common mode inductors act as EMI filters to suppress the outward radiation of electromagnetic waves generated by high-speed signal lines.
[0004] According to the inventors, most of the existing ultra-large current common-mode inductors use the method of assembling magnetic cores, and a complete coil can be directly wound on a closed magnetic circuit magnetic core. However, a larger magnetic core window space is required during the winding process, making the volume of the manufactured inductor larger; it can also be assembled by using assembled magnetic cores and complete coils, but the assembled magnetic cores will reduce the overall magnetic permeability of the magnetic medium to a certain extent, reduce the impedance of the entire inductor or increase the volume of the inductor, thereby reducing the power density of the power supply. Therefore, the existing common-mode inductors cannot meet the requirements of high inductance, high impedance and small volume. Utility Model Content
[0005] In order to solve the above problems, the utility model proposes an assembled common-mode inductor, which adopts a fully closed magnetic circuit core, a spliced coil and a base; a plurality of spliced coils are arranged on the fully closed magnetic circuit core, and the terminal ends of the spliced coils pass through the base to achieve a fixed connection, thereby obtaining a common-mode inductor with large current, small volume and large inductance.
[0006] According to some embodiments, the solution of the utility model provides an assembled common-mode inductor, which adopts the following technical solution:
[0007] A spliced common mode inductor comprises a base and a fully closed magnetic circuit core, a spliced coil and a spliced portion arranged on the base; wherein the edge of the base is provided with a first groove matching the first direction of the fully closed magnetic circuit core; the spliced coil is sleeved on the second direction of the fully closed magnetic circuit core, the base is provided with a through hole matching the terminal end of the spliced coil, and the end of the spliced coil passes through the through hole and is fixed to the base through the spliced portion.
[0008] As a further technical limitation, the first direction and the second direction of the fully closed magnetic circuit core are arranged perpendicularly.
[0009] As a further technical limitation, the fully closed magnetic circuit core is arranged in a loop-shaped structure.
[0010] As a further technical limitation, the number of the first grooves is two.
[0011] As a further technical limitation, the splicing portion adopts a splicing line row, the bottom of the base is provided with a second groove matching the splicing line row, and the splicing coil passes through the base and is fixed on the base through the splicing line row.
[0012] Furthermore, the openings on the spliced wire array respectively match the terminal ends of the spliced coil and the through holes; and the number of the second grooves matches the number of the spliced wire arrays.
[0013] As a further technical limitation, the splicing portion is a copper-clad plate portion, and the copper-clad portion is arranged on the surface of the bottom of the base.
[0014] Furthermore, a copper-clad through hole matching the through hole is provided on the copper-clad portion, and the terminal end of the spliced coil passes through the through hole and the copper-clad through hole in sequence and is then fixed on the base.
[0015] As a further technical limitation, the spliced coils are symmetrically arranged along the perpendicular bisector of the first direction of the fully closed magnetic circuit core.
[0016] As a further technical limitation, the spliced coil adopts a U-shaped structure.
[0017] Compared with the prior art, the beneficial effects of the utility model are:
[0018] The utility model arranges a plurality of spliced coils on a fully closed magnetic circuit magnetic core, and the terminal ends of the spliced coils penetrate through a base to achieve fixed connection, thereby obtaining a common mode inductor with large current, small volume and large inductance value. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.
[0020] Figure 1 This is a structural schematic diagram of the assembled common-mode inductor in the first embodiment of the utility model;
[0021] Figure 2 This is another structural schematic diagram of the assembled common-mode inductor in the first embodiment of the utility model;
[0022] Figure 3 It is an exploded schematic diagram of the assembled common mode inductor in the first embodiment of the utility model;
[0023] Figure 4 It is a structural schematic diagram of the splicing wire row in the first embodiment of the utility model;
[0024] Figure 5 This is a structural schematic diagram of the base in the first embodiment of the utility model;
[0025] Figure 6 This is a schematic diagram of another structure of the base in the first embodiment of the utility model;
[0026] Figure 7 This is a structural schematic diagram of the assembled common-mode inductor in the second embodiment of the utility model;
[0027] Figure 8 This is a structural schematic diagram of a base in Embodiment 2 of the present utility model;
[0028] Among them, 1. base; 11. first groove; 12. second groove; 13. through hole; 2. fully closed magnetic circuit core; 3. spliced coil; 4. spliced wire row; 41. opening; 5. copper clad part; 51. copper clad through hole. DETAILED DESCRIPTION
[0029] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0030] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.
[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the 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 be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0032] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention and should not be understood as limitations on the present invention.
[0033] In the present utility model, terms such as "fixed connection", "connected", "connection", etc. should be understood in a broad sense, indicating that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meanings of the above terms in the present utility model can be determined according to specific circumstances, and they cannot be understood as limitations on the present utility model.
[0034] Embodiment 1
[0035] This embodiment introduces an assembled common-mode inductor. In this embodiment, the splicing part adopts a spliced coil.
[0036] In order to solve the problem that common-mode inductors cannot meet the requirements of high inductance, high impedance and small volume, this embodiment combines a split magnetic core and a coil, and sets a coil on a completely closed magnetic circuit magnetic core. Due to the limitations of the magnetic core strength and the winding window size, the overcurrent capacity and product volume of the assembled common-mode inductor are relatively small.
[0037] like Figure 1 , Figure 2 and Figure 3 The assembled common mode inductor shown includes a base 1 and a fully closed magnetic circuit core 2 , a spliced coil 3 and a spliced wire row 4 arranged on the base 1 .
[0038] It should be noted that the base 1 in this embodiment is an insulating plate.
[0039] like Figure 5 The base 1 shown in the figure has two first grooves 11 on the edge of the base 1 that match the first direction of the fully closed magnetic circuit core 2; the fully closed magnetic circuit core 2 in this embodiment adopts a circular structure, and the two ends of the fully closed magnetic circuit core 2 are respectively placed on the first grooves 11. At this time, there is a certain gap between the fully closed magnetic circuit core 2 and the base 1; the base 1 is provided with a through hole 13 that matches the terminal end of the spliced coil 3, and the end of the spliced coil 3 passes through the through hole 13 and is fixed to the base 1 through the spliced wire row 4.
[0040] It should be noted that the first direction and the second direction of the fully closed magnetic circuit core 2 are arranged perpendicularly.
[0041] The specific structure of the splicing line row 4 is as follows Figure 4 As shown, the spliced wire bar 4 in this embodiment can be a spliced copper bar.
[0042] like Figure 4 and Figure 6As shown, the bottom of the base 1 is provided with a plurality of second grooves 12 matching the spliced wire rows 4, and the number of the second grooves 12 matches the number of the spliced wire rows 4; the openings 41 on the spliced wire rows 4 respectively match the terminal ends and the through holes 13 of the spliced coils 3; the number of the second grooves 12 matches the number of the spliced wire rows 4.
[0043] The spliced coil 3 adopts a U-shaped structure. The spliced coil 3 is arranged on the second direction of the fully closed magnetic circuit core 2. The number of spliced coils 3 can be set to an even number. The spliced coils 3 are symmetrically arranged along the mid-perpendicular line of the first direction of the fully closed magnetic circuit core 2.
[0044] The spliced coil 3 in this embodiment is a "U"-shaped semi-open (3 / 4T) coil made of enameled copper wire; the "U"-shaped semi-open coil can be tightly inserted into the fully closed magnetic circuit core 2 with a slightly smaller inner diameter. The core column will not be subjected to a large supporting force during winding, and the copper wire does not require too much winding space, which greatly reduces the volume of the common mode inductor.
[0045] During the assembly process, the fully closed magnetic circuit core 2 coated with high magnetic permeability is clamped into the first groove 11 of the base 1; the spliced coil 2 is sleeved on the second direction of the fully closed magnetic circuit core 2 and inserted into the through hole 13 of the base 1, and a fixed connection is achieved at the bottom of the base 1 through the spliced wire row 4.
[0046] In this embodiment, in order to realize the buckle installation of the coil onto the winding pole and reduce the space for connecting the spliced wire row at the bottom, thereby reducing the size of the inductor, the enameled copper wire of the spliced coil 3 is folded into a U shape and the end is cut into a T shape for lead-out. To ensure sufficient welding area, the width of the T-shaped leg is not less than 1 / 2 of the total width. To facilitate the hole connection welding, after the spliced wire row 4 is placed in the second groove on the base 1, the end is passed through the spliced wire row 4 and led out to the base, and a multi-turn coil is formed by high-frequency welding.
[0047] In this embodiment, a plurality of spliced coils 3 are arranged on the fully closed magnetic circuit core 2. The terminal ends of the spliced coils 3 pass through the base 1 and are fixedly connected through the spliced wire row 4 to obtain a common mode inductor with large current, small volume and large inductance.
[0048] Embodiment 2
[0049] This embodiment introduces an assembled common-mode inductor. In this embodiment, the splicing portion is a copper-clad portion.
[0050] like Figure 1 and Figure 7 The assembled common mode inductor shown includes a base 1 and a fully closed magnetic circuit core 2, a spliced coil 3 and a copper clad portion 5 arranged on the base 1.
[0051] It should be noted that the base 1 in this embodiment is made of a PCB board.
[0052] like Figure 8 As shown, the copper-clad portion 5 is arranged on the bottom surface of the base 1, and the copper-clad portion is arranged to expose copper according to the actual inductor circuit, so that adjacent coils are connected; a copper-clad through hole 51 matching the through hole 13 is opened on the copper-clad portion 5, and the terminal end of the spliced coil 3 passes through the through hole 13 and the copper-clad through hole 51 in sequence and is fixed on the base 1; that is, the terminal end of the spliced coil 3 does not need to be cut into a T-shape and led out through the base 1 and then welded on the copper-clad board 5. It is only necessary to pass the terminal end of the spliced coil 3 through the corresponding through hole 13 and the copper-clad through hole 51 and then weld it on the copper-clad portion 5, so that the two adjacent coils can be connected, reducing the overall height and volume of the inductor, and facilitating the welding of the inductor on the power board. In addition, the copper-clad portion can also be set on the surface of the top of the base to facilitate the circuit connection between other components and the inductor.
[0053] It should be noted that the structure of the assembled common-mode inductor in this embodiment, except for the splicing part, the fixing method of the splicing coil and the base, and the bottom structure of the base, the other structural settings and connection relationships are consistent with the structural settings and connection relationships in Example 1; this embodiment will not be repeated here.
[0054] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
[0055] Although the above describes the specific implementation methods of the utility model in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.
Claims
1. An assembled common mode inductor, characterized in that: It comprises a base, a fully closed magnetic circuit core, a spliced coil and a spliced portion arranged on the base; wherein the edge of the base is provided with a first groove matching the first direction of the fully closed magnetic circuit core; the spliced coil is sleeved on the second direction of the fully closed magnetic circuit core, the base is provided with a through hole matching the terminal end of the spliced coil, and the end of the spliced coil passes through the through hole and is fixed to the base through the spliced portion; The splicing part adopts a splicing line row, the bottom of the base is provided with a second groove matching the splicing line row, and the splicing coil passes through the base and is fixed on the base through the splicing line row; The openings on the spliced wire row respectively match the terminal ends of the spliced coil and the through holes; the number of the second grooves matches the number of the spliced wire rows; The splicing portion is a copper-clad portion, and the copper-clad portion is arranged on the surface of the bottom of the base; The copper-clad portion is provided with a copper-clad through hole matching the through hole, and the terminal end of the spliced coil passes through the through hole and the copper-clad through hole in sequence and is then fixed on the base.
2. The assembled common mode inductor as claimed in claim 1, characterized in that: The first direction and the second direction of the fully closed magnetic circuit core are arranged perpendicularly.
3. The assembled common mode inductor as claimed in claim 1, characterized in that: The fully closed magnetic circuit magnetic core is arranged in a loop-shaped structure.
4. The assembled common mode inductor as claimed in claim 1, characterized in that: The number of the first grooves is two.
5. The assembled common mode inductor as claimed in claim 1, characterized in that: The spliced coils are symmetrically arranged along the perpendicular bisector of the first direction of the fully closed magnetic circuit core.
6. The assembled common mode inductor as claimed in claim 1, characterized in that: The spliced coil adopts a U-shaped structure.