Novel four-common-mode and differential-mode integrated inductor

Abstract

The invention discloses a novel four-common-mode and differential-mode integrated inductor, which belongs to the technical field of inductors, and comprises a base, magnetic cores are inserted in the left side and the right side of the base, coils are wound on the magnetic cores, the coils are located at the top in the base, magnetic glue is arranged in the middle of the top of the base, the magnetic glue is located in the middle of the coils, and the magnetic cores abut against the magnetic glue; the structure of the device is designed, the purpose of reducing devices through magnetic integration is achieved, the production cost is reduced, meanwhile, the performance of a differential mode inductor is achieved, the requirements of the current market are met, and the device is high in practicability and good in market prospect.

Description

Technical Field

[0001] The invention relates to the technical field of inductors, and in particular to a novel four-common differential-mode integrated inductor. Background Art

[0002] An inductor is a component that can convert electrical energy into magnetic energy and store it. The structure of an inductor is similar to that of a transformer, but it has only one winding. An inductor has a certain inductance and only hinders changes in current. If there is no current passing through the inductor, it will try to hinder the current from flowing through it when the circuit is connected; if there is current passing through the inductor, it will try to maintain the current unchanged when the circuit is disconnected.

[0003] With the development of photovoltaic, automotive and communication power supply technologies, and the development of magnetic component technologies such as inductors, the magnetic integration and miniaturization of devices have become an important direction for the development of magnetic component technologies. Among them, inductors are the main devices, and the related demand is constantly increasing. For this reason, a new type of four-common differential mode integrated inductor is proposed. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a novel four-common differential mode integrated inductor.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a new type of four-common differential mode integrated inductor, including a base, wherein magnetic cores are inserted on both sides of the left and right sides of the base, a coil is wound on the magnetic core, and the coil is located at the top of the base. A magnetic glue is provided in the middle of the top of the base, and the magnetic glue is located in the middle of the coil, and the magnetic core is in contact with the magnetic glue.

[0006] Preferably, the base is provided with an integrally formed first positioning plate, a second positioning plate and a partition plate on the front and rear sides, the first positioning plate is located on the left and right sides of the base, the second positioning plate is located in the middle of the base, the first positioning plate and the second positioning plate are parallel to each other, the first positioning plate and the second positioning plate are perpendicular to the partition plate, and an installation groove is provided between the partition plates on the front and rear sides in the middle of the base, the first positioning plate, the second positioning plate and the partition plate cooperate to form two cavities, and there are four cavities in total on the base.

[0007] Preferably, the magnetic core is provided with an integrally formed side column and a center column, the side columns are located at the front and rear sides of the magnetic core, the center column is located in the middle of the magnetic core, the side columns are respectively located in each cavity, the coil is wound on the side columns, the two ends of the coil are respectively abutted against the first positioning plate and the second positioning plate, the center columns on the magnetic core on both sides of the base are respectively located at the two ends of the mounting groove, the composite magnetic rubber material is located in the mounting groove, and the center column is abutted against the composite magnetic rubber material.

[0008] Preferably, the base is made of plastic bakelite.

[0009] Preferably, the magnetic core is made of high-conductivity manganese-zinc ferrite.

[0010] Preferably, the coil is an enameled wire, and is a flat enameled wire.

[0011] Preferably, the composite magnetic adhesive material is composed of silicone grease, thermal conductive adhesive, Fe, Si, Al, Ni, B, Cu, Nb and other components.

[0012] Preferably, the silicone grease thermal conductive adhesive content of the composite magnetic glue material is 40%-50%, the Fe content is 40-45.95%, the Si content is 2-6.55%, the Al content is 0.5-5.5%, the Ni content is 0.1-0.5%, the Cu content is 0.05-0.5%, the B content is 0.05-0.3%, the Nb content is 0.02-0.2%, and the content of other components is about 0.01-0.1%. The metal component is in the form of alloy powder, and its particle size is 15-20μm, and the magnetic permeability of the composite magnetic glue material is about 5-10μ.

[0013] Furthermore, the composition and magnetic permeability of the composite magnetic adhesive material can be adjusted according to different requirements.

[0014] The working principle of the novel four-common differential mode integrated inductor of the present invention is as follows: the base is used as a carrier and is made of plastic bakelite. The top of the base is divided into four cavities by two groups of first positioning plates, second positioning plates and partition plates arranged on the front and rear sides thereof. The magnetic core and the coil are installed to achieve the balance of common mode inductance and differential mode inductance. The side column and the center column are arranged on the magnetic core to form an E-shaped structure. The center column cooperates with the composite magnetic glue material to adjust the air gap. As a component of the differential mode inductance, the coil adopts a flat enameled wire, which has obvious consistency and heat dissipation during winding, and plays an obvious role in balancing the common mode inductance and the differential mode inductance. Due to the composition of the composite magnetic glue material, the magnetic glue has fluidity and can be evenly distributed. When a current of 1-3A passes through, the differential mode inductance still retains the inductance formed by the composite magnetic glue material. The four-common differential mode integrated inductor has a high degree of integration, can reduce the use of devices, reduce production costs, and the performance of its differential mode inductance is guaranteed, which is conducive to improving the practicality of the device.

[0015] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0016] The structure of the device is designed to achieve the purpose of magnetic integration to reduce devices, reduce production costs, and at the same time achieve the performance of differential mode inductance, which meets the current market needs. The device has high practicality and good market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the overall structure of a novel four-common differential mode integrated inductor in the embodiment;

[0018] Figure 2 It is a schematic diagram of an exploded structure of a novel four-common differential mode integrated inductor in an embodiment;

[0019] Wherein: 1. base; 11. first positioning plate; 12. second positioning plate; 13. partition plate; 14. mounting groove; 2. magnetic core; 21. side column; 22. center column; 3. coil; 4. composite magnetic rubber material. DETAILED DESCRIPTION

[0020] The following is attached to the instruction manual Figure 1-2 , the technical solution of the present invention is explained through specific embodiments.

[0021] Embodiment:

[0022] like Figure 1 and Figure 2 As shown, a novel four-common differential mode integrated inductor provided by the present invention comprises a base 1, a magnetic core 2 is plugged into both the left and right sides of the base 1, a coil 3 is wound on the magnetic core 2, the coil 3 is located at the top of the base 1, a composite magnetic rubber material 4 is provided in the middle of the top of the base 1, the composite magnetic rubber material 4 is located in the middle of the coil 3, and the magnetic core 2 is in contact with the composite magnetic rubber material 4;

[0023] The base 1 is provided with an integrally formed first positioning plate 11, a second positioning plate 12, and a partition plate 13 on both the front and rear sides. The first positioning plate 11 is located on the left and right sides of the base 1, and the second positioning plate 12 is located in the middle of the base 1. The first positioning plate 11 and the second positioning plate 12 are parallel to each other. The first positioning plate 11 and the second positioning plate 12 are perpendicular to the partition plate 13. A mounting groove 14 is provided between the partition plates 13 on the front and rear sides in the middle of the base 1;

[0024] The magnetic core 2 is provided with an integrally formed side column 21 and a center column 22, the side column 21 is located at the front and rear sides of the magnetic core 2, and the center column 22 is located in the middle of the magnetic core 2;

[0025] The first positioning plate 11, the second positioning plate 12 and the partition plate 13 cooperate to form two cavities. There are four cavities on the base 1. The side columns 21 are respectively located in each cavity. The coil 3 is wound on the side columns 21. The two ends of the coil 3 are respectively abutted against the first positioning plate 11 and the second positioning plate 12. The center columns 22 on the magnetic core 2 on both sides of the base 1 are respectively located at the two ends of the installation groove 14. The composite magnetic rubber material 4 is located in the installation groove 14, and the center column 22 is abutted against the composite magnetic rubber material 4.

[0026] It should be noted that, in the present embodiment, the base 1 is made of plastic bakelite, the magnetic core 2 is made of high-conductivity manganese-zinc ferrite, the coil 3 is an enameled wire, and it is a flat enameled wire; the composite magnetic adhesive material 4 is composed of silicone grease thermal conductive adhesive, Fe, Si, Al, Ni, B, Cu, Nb and other components, and the silicone grease thermal conductive adhesive content of the composite magnetic adhesive material 4 is 40%-50% (its main components are not described in detail), the Fe content is 40-45.95%, the Si content is 2-6.55%, the Al content is 0.5-5.5%, and the Nb content is 0. The i content is 0.1-0.5%, the Cu content is 0.05-0.5%, the B content is 0.05-0.3%, the Nb content is 0.02-0.2%, and the content of other components is about 0.01-0.1%. The metal component exists in the form of alloy powder with a particle size of 15-20μm. The magnetic permeability of the composite magnetic rubber material is about 5-10μ. The composition of the composite magnetic rubber material can adjust the composition ratio and magnetic permeability according to different requirements.

[0027] The differential mode inductance is formed in such a way that one part is the leakage inductance generated during the short circuit of the coil 3, the other part is the inductance generated by the center column 22 on the magnetic core 2, and the remaining part is the inductance generated by the composite magnetic rubber material 4. By assembling the four common differential mode integrated inductors, the differential mode inductance is high. When a current of 1-3A passes through, the differential mode inductance still retains the inductance generated by the composite magnetic rubber material 4. The inductance 4 generated by the composite magnetic rubber material 4 is composed of silicone grease thermal conductive glue, Fe, Si, Al, Ni, B, Cu, Nb and other components, which plays a key role. The inductance 4 generated by the composite magnetic rubber material 4 has liquid fluidity and can be evenly distributed.

[0028] In summary, the four-common differential-mode integrated inductor has high magnetic integration. Compared with conventional inductors, it reduces the use and assembly of devices while achieving the performance of differential-mode inductors. It has good market prospects and is conducive to improving the practicality of the device.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel four-common differential mode integrated inductor, comprising a base (1), characterized in that: A magnetic core (2) is inserted into both left and right sides of the base (1), a coil (3) is wound on the magnetic core (2), the coil (3) is located at the top of the base (1), a composite magnetic material (4) is provided in the middle of the top of the base (1), the composite magnetic material (4) is located in the middle of the coil (3), and the magnetic core (2) is in contact with the composite magnetic material (4).

2. The novel quad common differential mode integrated inductor according to claim 1, characterized in that: The base (1) is provided with an integrally formed first positioning plate (11), a second positioning plate (12) and a partition plate (13) on both the front and rear sides; the first positioning plate (11) is located on the left and right sides of the base (1); the second positioning plate (12) is located in the middle of the base (1); the first positioning plate (11) and the second positioning plate (12) are parallel to each other; the first positioning plate (11) and the second positioning plate (12) are perpendicular to the partition plate (13); a mounting groove (14) is provided between the partition plates (13) on the front and rear sides in the middle of the base (1); the first positioning plate (11), the second positioning plate (12) and the partition plate (13) cooperate to form two cavities; there are four cavities in total on the base (1).

3. The novel four-common differential mode integrated inductor according to claim 2, characterized in that: The magnetic core (2) is provided with an integrally formed side column (21) and a center column (22); the side column (21) is located at the front and rear sides of the magnetic core (2); the center column (22) is located in the middle of the magnetic core (2); the side columns (21) are respectively located in each cavity; the coil (3) is wound on the side column (21); the two ends of the coil (3) are respectively in contact with the first positioning plate (11) and the second positioning plate (12); the center columns (22) on the magnetic core (2) on both sides of the base (1) are respectively located at the two ends of the mounting groove (14); the composite magnetic rubber material (4) is located in the mounting groove (14); and the center column (22) is in contact with the composite magnetic rubber material (4).

4. The novel quad common differential mode integrated inductor according to claim 1, characterized in that: The base (1) is made of plastic bakelite.

5. The novel quad common differential mode integrated inductor according to claim 1, characterized in that: The material of the magnetic core (2) is high-conductivity manganese-zinc ferrite.

6. The novel quad common differential mode integrated inductor according to claim 1, characterized in that: The coil (3) is an enameled wire, and is a flat enameled wire.

7. The novel quad common differential mode integrated inductor according to claim 1, characterized in that: The composite magnetic adhesive material (4) is composed of silicone grease thermal conductive adhesive, Fe, Si, Al, Ni, B, Cu, Nb and other components.

8. The novel quad common differential mode integrated inductor according to claim 7, characterized in that: The composite magnetic glue material (4) contains 40%-50% silicone thermal conductive glue, 40-45.95% Fe, 2-6.55% Si, 0.5-5.5% Al, 0.1-0.5% Ni, 0.05-0.5%, 0.05-0.5%, 0.05-0.3% B, 0.02-0.2% Nb, and about 0.01-0.1% other components. The metal component is in the form of alloy powder with a particle size of 15-20 μm. The magnetic permeability of the composite magnetic glue material is about 5-10 μm.

Images