Inductor structure capable of improving reverse coupling coefficient

Abstract

The utility model relates to an inductor structure capable of improving reverse coupling coefficient, which belongs to the technical field of coupling inductors, and comprises a magnetic core, a magnetic wrapping body, a first conducting plate and a second conducting plate, the magnetic core comprises a magnetic core bottom pendulum and a middle column vertically positioned on the magnetic core bottom pendulum, the first conducting plate and the second conducting plate are square coils formed by bending copper wires, and the first conducting plate and the second conducting plate are square coils. The first guide piece and the second guide piece are arranged in a staggered mode to form a double-layer square coil, the two ends of the first guide piece are a first terminal and a second terminal respectively, the two ends of the second guide piece are a third terminal and a fourth terminal respectively, and the first terminal and the third terminal are located on the same layer of the double-layer square coil. The second terminal and the fourth terminal are positioned on the other layer of the double-layer square coil; an insulating layer is arranged between the first guide sheet and the second guide sheet, sleeves the middle column and is wrapped by a magnetic wrapping body; the first guide sheet and the second guide sheet are wound in a staggered manner, so that the reverse coupling coefficient is larger, and the cross section area of the flat copper wire or the flat enameled wire is larger, thereby meeting the scene of large current resistance and low resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of coupled inductors, in particular to an inductor structure capable of improving a reverse coupling coefficient. Background Art

[0002] A coupled inductor generally includes a core and two conductors. The conductors are arranged inside the core. A region where no magnetic material is arranged is formed between the two conductors, thereby increasing the magnetic coupling between the two conductors.

[0003] At present, the market demand for coupled inductors tends to develop in the direction of high current resistance and low resistance. At the same time, they must also have a sufficiently large coupling coefficient and small size. By continuously adjusting the structure and position relationship of the two conductors in the core, we try to gradually meet the above requirements. Utility Model Content

[0004] The purpose of the present invention is to provide an inductor structure capable of improving the reverse coupling coefficient, so as to solve the problems mentioned in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An inductor structure capable of improving a reverse coupling coefficient comprises a magnetic core, a first guide plate, a second guide plate and a magnetic inclusion body, wherein the magnetic core comprises a magnetic core bottom swing and a middle column vertically located on the magnetic core bottom swing, the first guide plate and the second guide plate are both square coils formed by bending copper wires, the first guide plate and the second guide plate are staggered to form a double-layer square coil, the two ends of the first guide plate are respectively a first terminal and a second terminal, the two ends of the second guide plate are respectively a third terminal and a fourth terminal, the first terminal and the third terminal are located on the same layer of the double-layer square coil, the second terminal and the fourth terminal are located on another layer of the double-layer square coil, the first guide plate and the second guide plate are sleeved on the middle column, an insulating layer is provided between the first guide plate and the second guide plate, the magnetic inclusion body is wrapped around the magnetic core, the first guide plate and the second guide plate, and the first terminal, the second terminal, the third terminal and the fourth terminal are respectively exposed outside the magnetic inclusion body.

[0007] Preferably, the first guide plate includes a first frame portion and a first interlaced portion, the second guide plate includes a second frame portion and a second interlaced portion, the first interlaced portion and the second interlaced portion are intertwined and interlaced with each other, and the first frame portion and the second frame portion are arranged side by side.

[0008] Preferably, the magnetic core and the magnetic inclusion are both made of magnetic materials after insulation treatment.

[0009] Preferably, the first guide plate and the second guide plate are formed by bending flat copper wire or flat enameled wire.

[0010] Preferably, the insulating layer is an insulating varnish coating, and the insulating varnish coating is formed on the surfaces of the first guide piece and the second guide piece.

[0011] Preferably, the first terminal, the second terminal, the third terminal and the fourth terminal are exposed on the bottom surface of the magnetic inclusion body and are subjected to laser plating to form a plating layer.

[0012] Preferably, the magnetic inclusion is formed by covering the magnetic core, the first guide plate and the second guide plate with insulating magnetic powder and pressing them through a hot pressing mold, or the insulating magnetic powder is pre-pressed into an upper cover, and the magnetic core, the first guide plate, the second guide plate and the upper cover are assembled together and then hot pressed. The magnetic core and the magnetic inclusion are combined by pressing with a hot pressing mold. After hot pressing, the volume of the magnetic core and the magnetic inclusion becomes smaller, the density increases, and the inductance value is higher.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model achieves a larger contact area and a larger reverse coupling coefficient by interlacing the first guide plate and the second guide plate with flat wires; the magnetic core and the magnetic inclusion are pressed and combined with a hot pressing mold, so that the volume of the magnetic core and the magnetic inclusion is reduced after hot pressing, the density is increased, and the inductance value is higher; the flat copper wire or flat enameled wire used for the first guide plate and the second guide plate has a larger cross-sectional area, thereby meeting the scenario of high current and low resistance resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the first guide plate of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the second guide vane of the utility model;

[0017] Figure 3 The first guide plate and the second guide plate of the utility model are combined in a state as shown in FIG. Figure 1 ;

[0018] Figure 4 The first guide plate and the second guide plate of the utility model are combined in a state as shown in FIG. Figure 2 ;

[0019] Figure 5 The first guide plate and the second guide plate of the utility model are combined in a state as shown in FIG. Figure 3 ;

[0020] Figure 6 This is a schematic diagram of the magnetic core structure of the utility model;

[0021] Figure 7 It is a schematic diagram of the combination state of the magnetic core and the first guide piece and the second guide piece of the utility model;

[0022] Figure 8 The utility model internal view Figure 1;

[0023] Fig. 9 The utility model internal view Figure 2 .

[0024] Reference numerals

[0025] 1. Magnetic core, 101. Middle column, 2. Magnetic inclusion, 3. First guide plate, 301. First frame portion, 302. First interlaced portion, 303. First terminal, 304. Second terminal, 4. Second guide plate, 401. Second frame portion, 402. Second interlaced portion, 403. Third terminal, 404. Fourth terminal, 5. Electroplating layer. DETAILED DESCRIPTION

[0026] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0027] like Figure 8 , Fig. 9 As shown, the utility model provides an inductor structure capable of improving the reverse coupling coefficient, comprising a magnetic core 1, a magnetic inclusion 2, a first guide plate 3 and a second guide plate 4, wherein the first guide plate 3 and the second guide plate 4 simultaneously function as coils.

[0028] The magnetic inclusion 2 is formed by covering the magnetic core 1, the first guide plate 3 and the second guide plate 4 with insulating iron powder and pressing them through a hot pressing mold, or the insulating iron powder is pre-pressed into an upper cover, and the magnetic core, the first guide plate, the second guide plate and the upper cover are assembled together and then hot pressed. The magnetic core 1 and the magnetic inclusion 2 are combined by pressing with a hot pressing mold. After hot pressing, the volume of the magnetic core 1 and the magnetic inclusion 2 becomes smaller, the density increases, and the inductance value is higher.

[0029] The first terminal 303, the second terminal 304, the third terminal 403 and the fourth terminal 404 are respectively exposed on the outside of the magnetic inclusion body 2. The first terminal 303, the second terminal 304, the third terminal 403 and the fourth terminal 404 are exposed on the bottom surface of the magnetic inclusion body 2 and are subjected to laser electroplating to form a plating layer 5 for protection. The plating layer 5 is used to connect with the circuit board, and the first terminal 303, the second terminal 304, the third terminal 403 and the fourth terminal 404 can be welded (or bonded) to the circuit board by solder (or conductive adhesive).

[0030] like Figure 6 As shown, the magnetic core 1 includes a magnetic core bottom swing and a middle column 101 vertically located on the magnetic core bottom swing.

[0031] like Figure 1-5As shown, the first guide piece 3 and the second guide piece 4 are square coils formed by bending flat copper wire or flat enameled wire. The first guide piece 3 and the second guide piece 4 are staggered to form a double-layer square coil. The two ends of the first guide piece 3 are respectively the first terminal 303 and the second terminal 304, and the two ends of the second guide piece 4 are respectively the third terminal 403 and the fourth terminal 404. The first terminal 303 and the third terminal 403 are located on the same layer of the double-layer square coil, and the second terminal 304 and the fourth terminal 404 are located on another layer of the double-layer square coil. The first guide piece 3 includes a first square frame portion 301 and a first staggered portion 302, and the second guide piece 4 includes a second square frame portion 401 and a second staggered portion 402. The first staggered portion 302 and the second staggered portion 402 are intertwined and staggered with each other, and the first square frame portion 301 and the second square frame portion 401 are arranged in parallel.

[0032] like Figure 7 As shown, the first guide piece 3 and the second guide piece 4 are sleeved on the center column 101, and an insulating layer is provided between the first guide piece 3 and the second guide piece 4. When the first guide piece 3 and the second guide piece 4 are formed by bending flat copper wires, the insulating layer is an insulating varnish coating, and the insulating varnish coating is formed on the surface of the first guide piece 3 and the second guide piece 4; when the first guide piece 3 and the second guide piece 4 are flat enameled wires, the varnish film is the insulating layer.

[0033] By staggered winding of the first guide plate 3 and the second guide plate 4, the contact area is larger and the reverse coupling coefficient is larger; the first guide plate 3 and the second guide plate 4 are coated with insulating paint or paint film to reduce the distance between the two layers of guide plates, which can also increase the coupling coefficient.

[0034] The magnetic core 1 and the magnetic inclusion 2 are combined by pressing with a hot pressing mold. After hot pressing, the volume of the magnetic core 1 and the magnetic inclusion 2 becomes smaller, the density increases, and the inductance value is higher; the first guide plate 3 and the second guide plate 4 are made of flat copper wire or flat enameled wire bent to have a larger cross-sectional area and smaller resistance, thereby meeting the scenario of high current and low resistance; the middle column 101 on the magnetic core 1 passes through the first guide plate 3 and the second guide plate 4 to better fix them.

[0035] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An inductor structure capable of improving a reverse coupling coefficient, characterized in that: It includes a magnetic core, a first guide plate, a second guide plate and a magnetic inclusion body, wherein the magnetic core includes a magnetic core bottom swing and a middle column vertically located on the magnetic core bottom swing, the first guide plate and the second guide plate are both square coils formed by bending copper wires, the first guide plate and the second guide plate are staggered to form a double-layer square coil, the two ends of the first guide plate are respectively a first terminal and a second terminal, the two ends of the second guide plate are respectively a third terminal and a fourth terminal, the first terminal and the third terminal are located on the same layer of the double-layer square coil, the second terminal and the fourth terminal are located on the other layer of the double-layer square coil, the first guide plate and the second guide plate are sleeved on the middle column, an insulating layer is provided between the first guide plate and the second guide plate, the magnetic inclusion body is wrapped around the magnetic core, the first guide plate and the second guide plate, and the first terminal, the second terminal, the third terminal and the fourth terminal are respectively exposed to the outside of the magnetic inclusion body.

2. The inductor structure capable of improving the reverse coupling coefficient according to claim 1, characterized in that: The first guide piece includes a first frame portion and a first interlaced portion, the second guide piece includes a second frame portion and a second interlaced portion, the first interlaced portion and the second interlaced portion are intertwined and interlaced with each other, and the first frame portion and the second frame portion are arranged in parallel.

3. The inductor structure capable of improving the reverse coupling coefficient according to claim 1, characterized in that: The magnetic core and the magnetic inclusion are both made of magnetic materials after insulation treatment.

4. The inductor structure capable of improving the reverse coupling coefficient according to claim 1, characterized in that: The first guide piece and the second guide piece are formed by bending a flat copper wire or a flat enameled wire.

5. The inductor structure capable of improving the reverse coupling coefficient according to claim 4, characterized in that: The insulating layer is an insulating paint coating, and the insulating paint coating is formed on the surfaces of the first guide piece and the second guide piece.

6. The inductor structure capable of improving reverse coupling coefficient according to claim 1, characterized in that: The first terminal, the second terminal, the third terminal and the fourth terminal are exposed on the bottom surface of the magnetic inclusion body and are subjected to laser electroplating to form an electroplating layer.

7. The inductor structure capable of improving the reverse coupling coefficient according to claim 3, characterized in that: The magnetic inclusion is formed by covering the magnetic core, the first guide plate and the second guide plate with insulating magnetic powder and pressing them through a hot pressing mold, or pre-pressing the insulating magnetic powder into an upper cover, assembling the magnetic core, the first guide plate, the second guide plate and the upper cover together and then hot pressing them.

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