Anti-interference large-current common mode inductor

Abstract

The utility model relates to the technical field of common mode inductors, in particular to an anti-interference large-current common mode inductor which comprises two frameworks, magnetic cores are arranged on the frameworks, the two magnetic cores are fixedly connected, each magnetic core comprises an inner magnetic core body and an outer magnetic core body, the inner magnetic core body is connected with the frameworks, and the ends, close to each other, of the two outer magnetic core bodies are detachably connected. The common-mode inductor is formed by splicing the two magnetic cores, the materials of the magnetic cores can be selected according to needs, the integrated common-mode inductor is formed, the requirement for large power and large current is met, and the filtering anti-interference effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of common-mode inductors, in particular to an anti-interference high-current common-mode inductor. Background Art

[0002] Common-mode inductors are used in computer switching power supplies to filter common-mode electromagnetic interference signals. In board design, they are also used to suppress the outward emission of electromagnetic waves generated by high-speed signal lines. A common-mode inductor consists of a magnetic core and two coils wound around it. When the normal current in the circuit flows through the common-mode inductor, the currents generate opposing magnetic fields in the inductor coils wound in phase, canceling each other out. When common-mode current flows through the coils, the isotropic nature of the common-mode current generates a magnetic field in the same direction within the coils, increasing the coil's inductive reactance and making the coil appear high impedance. This creates a strong damping effect, thereby attenuating the common-mode current and achieving the filtering purpose.

[0003] However, common-mode inductors with existing structures are usually made by winding a magnetic core made of a single material, and have a narrow applicable bandwidth. In the circuit, two types of inductors, high and low frequency, are required to form two-stage common-mode filtering to meet the requirements. Therefore, common-mode inductors with conventional structures cannot flexibly adjust the magnetic core material. Utility Model Content

[0004] The purpose of the utility model is to provide an anti-interference high-current common-mode inductor, which solves the problem that the material of the common-mode inductor cannot be flexibly adjusted.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an anti-interference high-current common-mode inductor, comprising two skeletons, each of which is provided with a magnetic core, the two magnetic cores are fixedly connected, the magnetic core comprises an inner magnetic core and an outer magnetic core, the inner magnetic core is connected to the skeleton, and the ends of the two outer magnetic cores that are close to each other are detachably connected.

[0006] By adopting the above technical solution: this common-mode inductor is made of two magnetic cores spliced ​​together, and the material of the magnetic core can be selected as needed to form an integrated common-mode inductor, which meets the needs of high power and high current and further improves the filtering and anti-interference effect.

[0007] The frame is provided with a socket, and the inner magnetic core is connected to the socket.

[0008] By adopting the above technical solution: the magnetic core adopts a split structure, and the inner magnetic core can be quickly installed on the frame.

[0009] The outer magnetic core is composed of a first magnetic core seat, a second magnetic core seat and a third magnetic core seat. The third magnetic core seat is arranged at the connection of the two outer magnetic cores. Connecting columns are provided at both ends of the first magnetic core seat, and a clamping block is provided at one end of the connecting column. A first buckle groove is provided on one side of the second magnetic core seat for sliding engagement with the clamping block, and second buckle grooves are provided on both sides of the third magnetic core seat for sliding engagement with the clamping block.

[0010] By adopting the above technical solution: the junction of the two magnetic cores is the third magnetic core seat, and the ends of the first magnetic core seats of the two magnetic core seats that are close to each other are connected to the third magnetic core seat at the same time, and the other ends are connected through their respective second magnetic core seats, thereby connecting the two magnetic cores into one. Since the skeleton and the inner magnetic core are arranged in a frame structure surrounded by the first magnetic core seat, the second magnetic core seat and the third magnetic core seat, when the inner magnetic core is installed, the first magnetic core seat can be squeezed toward both ends, thereby making the overall connection of the magnetic core more secure.

[0011] The cross sections of the first buckle groove and the second buckle groove are L-shaped.

[0012] Grooves are provided on both side end faces of the skeleton, ribs connected to the grooves are provided on the inner wall of the first core seat, positioning grooves are provided at both ends of the inner core, and positioning blocks connected to the positioning grooves are provided on the inner wall of the first core seat.

[0013] By adopting the above technical solution: the skeleton and the first magnetic core seat are connected by grooves and ribs, so that the skeleton has a positioning effect in the frame structure of the magnetic core, and the positioning groove is connected to the positioning block to ensure that the inner magnetic core and the outer magnetic core have a precise position after being connected, thereby improving the reliability of the magnetic core structure when used.

[0014] The technical effects and advantages of this utility model are:

[0015] 1. In this solution, the common-mode inductor is made of two magnetic cores. The material of the magnetic core can be selected as needed to form an integrated common-mode inductor, which meets the needs of high power and high current and further improves the filtering and anti-interference effect.

[0016] 2. In this solution, the junction of the two magnetic cores is the third magnetic core seat. The ends of the first magnetic core seats of the two magnetic core seats that are close to each other are connected to the third magnetic core seat at the same time, and the other ends are connected through their respective second magnetic core seats, thereby connecting the two magnetic cores into one. Since the skeleton and the inner magnetic core are arranged in a frame structure surrounded by the first magnetic core seat, the second magnetic core seat and the third magnetic core seat, when the inner magnetic core is installed, the first magnetic core seat can be squeezed toward both ends, thereby making the overall connection of the magnetic core more secure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of an anti-interference high-current common-mode inductor provided by an embodiment of the utility model;

[0018] Figure 2 Schematic diagram of an exploded view of the magnetic core of the anti-interference high-current common-mode inductor provided by an embodiment of the present utility model;

[0019] Figure 3 This is a structural diagram of the first magnetic core seat of the anti-interference high-current common-mode inductor provided in an embodiment of the utility model.

[0020] Figure numerals: 1, skeleton; 101, groove; 2, coil; 3, inner magnetic core; 301, positioning groove; 4, first magnetic core seat; 401, convex rib; 5, second magnetic core seat; 501, first buckle groove; 6, third magnetic core seat; 601, second buckle groove; 7, positioning block; 8, connecting column; 9, clamping block. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] This embodiment provides Figure 1 The illustrated embodiment of an anti-interference, high-current common-mode inductor comprises two skeletons 1, each of which is wound with a coil 2. Each skeleton 1 is connected to a magnetic core, and the two cores are fixedly connected. The magnetic core comprises an inner core 3 and an outer core. The inner core 3 is connected to the skeleton 1, and the ends of the two outer cores that are adjacent to each other are detachably connected. Furthermore, the common-mode inductor of this embodiment is formed by splicing two magnetic cores. The material of the magnetic core can be selected as needed to form an integrated common-mode inductor that meets the needs of high power and high current, further improving the filtering and anti-interference effect.

[0023] Furthermore, since the magnetic core adopts a split structure, in this embodiment, a socket can be provided on the skeleton 1 , the inner magnetic core 3 is connected to the socket, and the inner magnetic core 3 can be quickly installed on the skeleton 1 .

[0024] like Figure 2 As shown, the outer magnetic core is composed of a first magnetic core seat 4, a second magnetic core seat 5 and a third magnetic core seat 6. The third magnetic core seat 6 is arranged at the connection between the two outer magnetic cores. Connecting columns 8 are provided at both ends of the first magnetic core seat 4, and a clamping block 9 is provided at one end of the connecting column 8. A first buckle groove 501 is provided on one side of the second magnetic core seat 5 for sliding engagement with the clamping block 9, and second buckle grooves 601 are provided on both sides of the third magnetic core seat 6 for sliding engagement with the clamping block 9.

[0025] Specifically, the junction of the two cores is the third core seat 6. The ends of the first core seats 4 of the two core seats that are close to each other are connected to the third core seat 6 at the same time, and the other ends are connected through their respective second core seats 5, thereby connecting the two cores into one. Since the skeleton 1 and the inner core 3 are arranged in a frame structure surrounded by the first core seat 4, the second core seat 5 and the third core seat 6, when the inner core 3 is installed, the first core seat 4 can be squeezed toward both ends, thereby making the overall connection of the core more secure. In addition, in this embodiment, after the block 9 and the connecting column 8 are combined, the cross-section line is T-shaped, and the cross-sections of the first buckle groove 501 and the second buckle groove 601 are L-shaped.

[0026] like Figure 3 As shown, grooves 101 are provided on both side end faces of the skeleton 1, ribs 401 connected to the grooves 101 are provided on the inner wall of the first core seat 4, positioning grooves 301 are provided at both ends of the inner core 3, and positioning blocks 7 connected to the positioning grooves 301 are provided on the inner wall of the first core seat 4.

[0027] Furthermore, the skeleton 1 and the first magnetic core seat 4 are connected through the groove 101 and the rib 401, so that the skeleton 1 has a positioning effect in the frame structure of the magnetic core. The positioning groove 301 is connected to the positioning block 7 to ensure that the inner magnetic core 3 and the outer magnetic core have a precise position after being connected, thereby improving the reliability of the magnetic core structure when used.

[0028] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An anti-interference high current common mode inductor, characterized in that: The invention comprises two frames (1), each frame (1) being provided with a magnetic core, the two magnetic cores being fixedly connected, the magnetic core comprising an inner magnetic core (3) and an outer magnetic core, the inner magnetic core (3) being connected to the frame (1), and the two outer magnetic cores being detachably connected at adjacent ends; The outer magnetic core is surrounded by a first magnetic core seat (4), a second magnetic core seat (5) and a third magnetic core seat (6); the third magnetic core seat (6) is arranged at the connection between the two outer magnetic cores; connecting columns (8) are provided at both ends of the first magnetic core seat (4); a clamping block (9) is provided at one end of the connecting column (8); a first buckle groove (501) is provided on one side of the second magnetic core seat (5) and is slidably engaged with the clamping block (9); and second buckle grooves (601) are provided on both sides of the third magnetic core seat (6) and are slidably engaged with the clamping block (9).

2. The anti-interference high current common mode inductor according to claim 1, characterized in that: The skeleton (1) is provided with an insertion hole, and the inner magnetic core (3) is connected to the insertion hole.

3. The anti-interference high current common mode inductor according to claim 1, characterized in that: The cross-sections of the first buckle groove (501) and the second buckle groove (601) are L-shaped.

4. An anti-interference high current common mode inductor according to any one of claims 1 to 3, characterized in that: Grooves (101) are provided on both side end surfaces of the skeleton (1); ribs (401) connected to the grooves (101) are provided on the inner wall of the first magnetic core seat (4); positioning grooves (301) are provided at both ends of the inner magnetic core (3); and positioning blocks (7) connected to the positioning grooves (301) are provided on the inner wall of the first magnetic core seat (4).

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