CN220569517U

CN220569517U - High-efficiency common-mode inductor

Info

Publication number: CN220569517U
Application number: CN202322060501.6U
Authority: CN
Inventors: 蔡旭升; 欧晓红
Original assignee: Chengdu Jinzhichuan Electronic Co ltd
Current assignee: Chengdu Jinzhichuan Electronic Co ltd
Priority date: 2023-08-02
Filing date: 2023-08-02
Publication date: 2024-03-08
Anticipated expiration: 2033-08-02

Abstract

The utility model provides a high efficiency common mode inductance, relates to common mode inductance technical field, and the technical scheme who adopts includes magnetic core group and winding, magnetic core group includes center pillar and two side posts, just center pillar and side post constitute closed magnetic circuit, the center pillar coiling has the coaxial line, the coaxial line includes inlayer line and outer line, outer line encircles inlayer line external surface, inlayer line and outer line form two the winding. According to the utility model, two windings are wound by adopting one coaxial wire, so that the consistency of the two windings is ensured, and the difference of two-phase inductances is reduced; the inner layer and the outer layer of the coaxial line core are stranded wires, so that skin effect loss at high frequency is reduced, and the working efficiency of the device at high frequency is improved; the magnetic core group is formed by splicing two magnetic cores, winding and installation of the framework, and splicing of the two magnetic cores can be performed by adopting automatic equipment, so that the processing efficiency is improved; and the inductance value is adjusted by adopting a mode of grinding a middle column of the magnetic core.

Description

High-efficiency common-mode inductor

Technical Field

The utility model relates to the technical field of common mode inductances, in particular to a high-efficiency common mode inductance.

Background

In the communication industry, common-mode inductors are used for filtering common-mode electromagnetic interference signals, and generally comprise a magnetic ring and two windings wound on the magnetic ring, wherein the magnetic ring provides a closed magnetic circuit, and the two windings are required to be symmetrically distributed. However, because the magnetic ring is closed, automatic production is difficult to realize, and windings are wound around the magnetic ring by adopting a manual winding method, the consistency of the two windings is difficult to ensure, the difference of the two-phase inductance of the two windings is large, and the performance of the common-mode inductance is influenced. Meanwhile, in order to ensure the stability of the inductance of the common-mode inductor of the same model, the number of windings is required to be adjusted according to the feeding of the magnetic core, so that the number of windings is not fixed, and the production and the processing are not facilitated.

Disclosure of Invention

Aiming at the problems that the structure of the common-mode inductor in the prior art is difficult to realize automatic production and the number of turns of the same type of products is different due to different magnetic core supplies, the utility model provides a high-efficiency common-mode inductor.

The utility model provides the following technical scheme: the utility model provides a high efficiency common mode inductance, includes magnetic core group and winding, magnetic core group includes center pillar and two side posts, just center pillar and side post constitute closed magnetic circuit, the center pillar coiling has the coaxial line, the coaxial line includes inlayer line and outer line, outer line encircles inlayer line external surface, inlayer line and outer line form two the winding.

Preferably, the cross section of the center pillar is circular or elliptical.

Preferably, the magnetic core group is formed by splicing two magnetic cores.

Preferably, the magnetic core is one of an EE type magnetic core, an EQ type magnetic core, and a PQ type magnetic core.

Preferably, the center post is provided with an air gap.

Preferably, the inner layer wire comprises an inner layer wire core and an inner insulating layer surrounding the outer surface of the inner layer wire core, and the outer layer wire comprises an outer layer wire core surrounding the outer surface of the inner insulating layer and an outer insulating layer surrounding the outer surface of the outer layer wire core.

Preferably, the inner layer wire core and the outer layer wire core are both made of multiple strands.

Preferably, the device further comprises a framework, wherein the framework is inserted on the middle column and is provided with 2 pairs of pins, one pair of pins are respectively and electrically connected with two ends of the inner layer wire, and the other pair of pins are respectively and electrically connected with two ends of the outer layer wire.

Preferably, 2 pairs of pins are arranged on one side of the magnetic core group, or 2 pairs of pins are respectively arranged on two sides of the magnetic core group.

The beneficial effects of the utility model are as follows: the windings are wound by coaxial wires, so that two windings are wound by one wire, the consistency of the two windings is guaranteed, the difference of two-phase inductances is reduced, and the difference of the inductances can be reduced to be within 0.5% from about 5% in the prior art; the inner layer and the outer layer of the coaxial line core are stranded wires, so that skin effect loss at high frequency is reduced, and the working efficiency of the device at high frequency is improved; the magnetic core group is formed by splicing two parts, winding and installation of the winding, installation of the framework and splicing of the two magnetic cores can be carried out by adopting automatic equipment, so that the processing efficiency is improved; the inductance value can be adjusted by adopting a mode of grinding the middle column of the magnetic core, so that the precise control of the inductance value is realized, the number of turns of common-mode inductance windings of the same model is fixed, and the method is more beneficial to mass processing.

Drawings

FIG. 1 is a three-dimensional schematic of an embodiment of the utility model.

Fig. 2 is a side view of one embodiment of the present utility model.

Fig. 3 is a schematic diagram of one embodiment of a magnetic core assembly.

Fig. 4 is a schematic diagram of one embodiment of a coaxial line.

FIG. 5 is a schematic view of one embodiment of a skeleton.

Reference numerals: 11. a center column; 12. a side column; 20. a coaxial line; 21. an inner layer wire core; 22. an inner insulating layer; 23. an outer layer wire core; 24. an outer insulating layer; 30. a skeleton; 31. pins.

Detailed Description

Embodiments of the present utility model will be described in more detail below with reference to the drawings and reference numerals, so that those skilled in the art can practice the present utility model after studying the specification. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The present utility model provides a high efficiency common mode inductor as shown in fig. 1-5, comprising a magnetic core assembly, windings and bobbin 30.

In this embodiment, the magnetic core group may be formed by splicing two EQ-shaped magnetic cores, and includes a center pillar 11 and two side pillars 12, and the center pillar 11 and the side pillars 12 form a closed magnetic circuit, where the cross section of the center pillar 11 is circular or elliptical, which is beneficial to the installation of the skeleton. The EQ type core is shown in fig. 3. During production, the framework 30 and the windings can be prepared and molded respectively, then the framework is arranged on the middle column 11 of one EQ type magnetic core, then two EQ type magnetic cores are spliced into a magnetic core group to form a closed magnetic circuit, and the splicing of the magnetic cores can refer to the related technology; winding, installation of winding and installation of skeleton, the amalgamation of two magnetic cores all can adopt automation equipment to go on, compare with prior art, have improved machining efficiency. Meanwhile, when two magnetic cores are combined, an air gap is formed between the middle columns 11, inductance can be adjusted by grinding the middle columns of the magnetic cores, accurate control of the inductance is achieved, the number of turns of common-mode inductance windings of the same model is fixed, and mass processing is facilitated. In other embodiments, EE type and PQ type cores may also be used for the core.

The center pillar 11 is wound with a coaxial line 20, the coaxial line 20 comprises an inner layer wire and an outer layer wire, the outer layer wire surrounds the outer surface of the inner layer wire, and the inner layer wire and the outer layer wire form two windings. The inner layer wire comprises an inner layer wire core 21 and an inner insulating layer 22 encircling the outer surface of the inner layer wire core 21, and the outer layer wire comprises an outer layer wire core 23 encircling the outer surface of the inner insulating layer 22 and an outer insulating layer 24 encircling the outer surface of the outer layer wire core 23. The coaxial line realizes that one line is wound to form two windings, is more beneficial to ensuring the consistency of the two windings, reduces the difference of two-phase inductances, and can reduce the difference of the inductances from about 5% to within 0.5% in the prior art. In this embodiment, the inner layer wire core 21 and the outer layer wire core 23 are made of multiple wires, so as to reduce skin effect loss at high frequency and improve working efficiency of the device at high frequency; wherein the inner layer wire core adopts 0.1 x 180 tinned copper wire, and the outer layer wire core adopts 0.06 x 320 tinned copper wire. In other embodiments, the inner layer and the outer layer wire cores can also adopt multi-strand silver-plated copper wires or common multi-strand enameled wires.

The framework 30 is provided with a through groove, is inserted on the middle column and is provided with 2 pairs of pins 31, one pair of pins 31 are respectively and electrically connected with two ends of the inner layer wire, and the other pair of pins 31 are respectively and electrically connected with two ends of the outer layer wire. In this embodiment, 2 pairs of pins 31 are disposed on one side of the magnetic core group; in other embodiments, 2 pairs of pins 31 may be disposed on two sides of the magnetic core set.

The foregoing is a description of one or more embodiments of the utility model, which are specific and detailed, but are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. The utility model provides a high efficiency common mode inductance, includes magnetic core group and winding, its characterized in that: the magnetic core group comprises a middle column (11) and two side columns (12), the middle column (11) and the side columns (12) form a closed magnetic circuit, a coaxial line (20) is wound on the middle column (11), the coaxial line (20) comprises an inner layer line and an outer layer line, the outer layer line is wound on the outer surface of the inner layer line, and the inner layer line and the outer layer line form two windings.

2. A high efficiency common mode inductor as claimed in claim 1 wherein: the cross section of the middle column (11) is round or oval.

3. A high efficiency common mode inductor as claimed in claim 1 wherein: the magnetic core group is formed by splicing two magnetic cores.

4. A high efficiency common mode inductor as claimed in claim 3 wherein: the magnetic core is one of an EE type magnetic core, an EQ type magnetic core and a PQ type magnetic core.

5. A high efficiency common mode inductor as claimed in claim 3 wherein: the center pillar (11) is provided with an air gap.

6. A high efficiency common mode inductor as claimed in claim 1 wherein: the inner layer wire comprises an inner layer wire core (21) and an inner insulating layer (22) encircling the outer surface of the inner layer wire core (21), and the outer layer wire comprises an outer layer wire core (23) encircling the outer surface of the inner insulating layer (22) and an outer insulating layer (24) encircling the outer surface of the outer layer wire core (23).

7. A high efficiency common mode inductor as claimed in claim 6 wherein: the inner layer wire core (21) and the outer layer wire core (23) are made of multiple strands.

8. A high efficiency common mode inductor as claimed in claim 1 wherein: the novel socket further comprises a framework (30), wherein the framework (30) is inserted on the middle column and is provided with 2 pairs of pins (31), one pair of pins (31) are respectively and electrically connected with two ends of the inner layer wire, and the other pair of pins (31) are respectively and electrically connected with two ends of the outer layer wire.

9. A high efficiency common mode inductor as claimed in claim 8 wherein: and 2 pairs of pins (31) are arranged on one side of the magnetic core group, or 2 pairs of pins (31) are respectively arranged on two sides of the magnetic core group.