CN212967292U

CN212967292U - Stranded common mode inductor

Info

Publication number: CN212967292U
Application number: CN202021248349.4U
Authority: CN
Inventors: 马国强; 翟振卫; 王先权; 苏相河; 覃宗爱; 张金锁; 王常辉; 易志福
Original assignee: Huizhou U&t Electronics Co ltd
Current assignee: Huizhou U&t Electronics Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-04-13
Anticipated expiration: 2030-06-30

Abstract

A twisted-pair common-mode inductor comprises a base component, a magnetic core, a twisted pair and a leading component, wherein the base component comprises a cover plate and two supporting blocks, the two supporting blocks and the cover plate are used for forming a winding area, the magnetic core is accommodated in the winding area, two ends of the magnetic core are respectively connected with the two supporting blocks in a one-to-one correspondence manner, the twisted pair is formed by twisting two wires, the twisted pair is wound on the magnetic core, the leading component is arranged on the supporting blocks, and the leading component is connected with the twisted pair, the two wires form the twisted pair in a twisting manner, so that the two wires can be tightly attached, the problem of magnetic leakage is solved, the two wires are crossed and overlapped to form a whole, accidental overlapping between the two wires is avoided, meanwhile, the two wires are twisted into a whole, and the tightness of the two wires can be ensured to be consistent in the winding process, thereby effectively improving the effect of controlling the electromagnetic wave of the noise.

Description

Stranded common mode inductor

Technical Field

The utility model relates to a technical field of inductance especially relates to a common mode inductance.

Background

The common mode inductor, also called a common mode choke, is commonly used to suppress the electromagnetic wave generated by the high speed signal line from radiating outwards. The common mode inductance is essentially a bi-directional filter: on one hand, common mode electromagnetic interference on a signal line is filtered, on the other hand, electromagnetic interference which is not emitted outwards is restrained, and normal work of other electronic equipment under the same electromagnetic environment is prevented from being influenced.

The traditional common mode inductor is formed by winding two parallel wires on a magnetic core or an iron core to achieve the purpose of suppressing common mode noise, and the traditional common mode inductor has the following problems:

firstly, in the traditional common mode inductor, two wires are wound in parallel in a winding process, and in an actual winding process, a gap inevitably exists between the two wires, so that the problem of magnetic leakage of the common mode inductor is caused, and particularly, the transmission effect of the common mode inductor applied to an automobile Ethernet is greatly reduced;

secondly, in the conventional common mode inductor, two wires are easy to overlap partially and not overlap partially in the winding process, so that the effect of the common mode inductor on controlling noise electromagnetic waves is reduced;

finally, in the winding production process of the traditional common mode inductor, compared with the winding of one conducting wire on the magnetic core or the iron core, the winding of two parallel conducting wires can increase the operation difficulty of workers, so that the tightness of the two conducting wires is easy to be inconsistent, and the effect of the common mode inductor for controlling the electromagnetic waves of the noise is finally reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the weak point among the prior art, provide one kind and can ensure that two parallel wires closely laminate at the coiling in-process, the part position can not appear overlapping and the part position is non-overlapping moreover for two wires, can ensure simultaneously that two wires can keep unanimous hank line formula common mode inductance at the elasticity of coiling process.

The purpose of the utility model is realized through the following technical scheme:

a twisted wire common mode inductor comprising:

the base assembly comprises a cover plate and two supporting blocks, and the two supporting blocks are respectively arranged at two ends of the cover plate so as to form a winding area between the two supporting blocks;

the magnetic core is accommodated in the winding area, and two ends of the magnetic core are respectively connected with the two supporting blocks in a one-to-one correspondence manner;

a twisted pair, wherein the twisted pair comprises two conductors, the two conductors are twisted with each other, so that the two conductors form the twisted pair, and the twisted pair is wound on the outer side wall of the magnetic core; and

the pin component comprises two pin pieces, wherein in one of the pin pieces, the pin piece comprises two pin pieces, the two pin pieces are respectively arranged on the two supporting blocks in a one-to-one correspondence manner, and the two pin pieces are respectively connected with two ends of the lead.

In one embodiment, the magnetic core is provided with a spiral groove, and the twisted pair is accommodated in the spiral groove.

In one embodiment, the wire is soldered to the tab.

In one embodiment, the leading tab is provided with a wire passing groove, and the lead wire is accommodated in the wire passing groove.

In one embodiment, the base assembly further includes a wire clamping block, the lead tab is provided with a wire clamping hole, the wire clamping block is accommodated in the wire clamping hole, and the wire clamping block is connected with the lead.

In one embodiment, the wire clamping block is provided with a Z-shaped groove, and the wire penetrates through the Z-shaped groove.

In one embodiment, a clamping boss is arranged on the wire clamping block and used for clamping the inner side wall of the wire clamping hole.

In one embodiment, the wire is an enameled wire.

In one embodiment, the tab is a copper foil.

In one embodiment, the tab is L-shaped.

Compared with the prior art, the utility model discloses at least, following advantage has:

the utility model discloses a stranded wire formula common mode inductance, including base subassembly, magnetic core, twisted pair and draw and connect the subassembly, the base subassembly includes apron and two supporting shoes, two supporting shoes and apron are used for forming the winding district, the magnetic core holding is in the winding district, and the both ends of magnetic core respectively one-to-one is connected with two supporting shoes, the twisted pair is twisted by two wires and is formed, and the twisted pair is coiled on the magnetic core, draw and connect the subassembly and install on the supporting shoe, and draw and connect the subassembly and be connected with the twisted pair, the stranded wire formula common mode inductance of the utility model, two wires utilize the mode of transposition to form the twisted pair, thereby make two wires can closely laminate, thereby improve the magnetic leakage problem, and two wires cross and overlap, become one, avoid there being accidental overlap between two wires, simultaneously because two wires are twisted as a whole, thereby can ensure that the elasticity of two wires keeps unanimo, thereby effectively improving the effect of controlling the electromagnetic wave of the noise.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a twisted-pair common mode inductor according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a part of a twisted pair of the twisted-pair common-mode inductor shown in fig. 1;

fig. 3 is a partial structural diagram of a magnetic core of the twisted common mode inductor shown in fig. 1;

fig. 4 is a schematic diagram of a part of the structure of the twisted common mode inductor shown in fig. 1;

fig. 5 is a schematic structural diagram of a wire clamping block according to an embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It is noted that as used herein, reference to an element being "connected" to another element also means that the element is "in communication" with the other element, and fluid can be in exchange communication between the two.

Referring to fig. 1, a twisted-pair common-mode inductor 10 includes a base assembly 100, a magnetic core 200, a twisted pair 300 and a lead assembly 400, the magnetic core 200 is fixed on the base assembly 100, the twisted pair 300 is wound on the magnetic core 200, the lead assembly 400 is fixed on the base assembly 100, and the lead assembly 400 is connected to the twisted pair 300, the twisted pair 300 is matched with the magnetic core 200 to achieve the purpose of suppressing electromagnetic noise, the twisted-pair common-mode inductor 10 of the present invention is configured to wind the twisted pair 300 on the magnetic core 200, that is, to make the two wires twisted into a whole, so as to ensure that the two wires can be tightly attached to each other without a gap between the two wires during the process of winding the magnetic core 200, thereby improving the problem of magnetic leakage, and the two wires are twisted to make the two wires into a whole, thereby avoiding accidental overlapping between the wires, meanwhile, as the two wires are twisted into the twisted pair 300, the tightness of the two wires in the winding process can be kept consistent, and the effect of the twisted common mode inductor on controlling noise electromagnetic waves can be improved finally.

Referring to fig. 1 and 2, the base assembly 100 includes a cover plate 110 and two supporting blocks 120, wherein the two supporting blocks 120 are respectively disposed at two ends of the cover plate 110, so that a winding area is formed between the two supporting blocks 120; the magnetic core 200 is accommodated in the winding area, and two ends of the magnetic core 200 are respectively connected with the two supporting blocks 120 in a one-to-one correspondence; the twisted pair 300 includes two wires 310, the two wires 310 are twisted to form the twisted pair 300, and the twisted pair 300 is wound on the outer side wall of the magnetic core 200; the lead assembly 400 includes two lead members 410, wherein in one of the lead members 410, the lead member 410 includes two lead pieces 411, the two lead pieces 411 are respectively disposed on the two supporting blocks 120 in a one-to-one correspondence manner, and the two lead pieces 411 are respectively connected to two ends of the conductive wire 310.

It should be noted that, the two supporting blocks 120 are respectively installed and fixed on two ends of the cover plate 110, and the side surfaces of the two supporting blocks 120 are parallel, so that a winding area can be formed between the two supporting blocks 120 and the cover plate 110, the winding area is used for accommodating the magnetic core 200, specifically, two ends of the magnetic core 200 are respectively connected with the two supporting blocks 120 in a one-to-one correspondence manner, so that the magnetic core 200 is located in the winding area, in one embodiment, the magnetic core 200 and the supporting blocks 120 are fixed together by using an adhesive, in another embodiment, the magnetic core 200 can also be in an integral molding structure with one of the supporting blocks 120, then the twisted pair 300 is wound around the magnetic core 200, and then the other supporting block 120 is welded on the magnetic core 200; the twisted pair 300 is formed by twisting two wires 310, and it should be noted that, the two wires 310 are tightly attached to each other during twisting, so that after the two wires 310 are twisted to form the twisted pair 300, the twisted pair 300 is wound along the outer side wall of the magnetic core 200, it should be noted that, the twisted pair 300 and the outer side wall of the magnetic core 200 are wound with not less than 2 turns, in an embodiment, the twisted pair 300 is wound on the magnetic core 200 for 10 turns, so that the magnetic core 200 can ensure sufficient filtering of the electrical signals in the twisted pair 300 to suppress electromagnetic noise waves, in an embodiment, the twisted pair 300 is wound on the magnetic core 200 to form a twisted pair coil, wherein, the distance between any adjacent twisted pair coil edges in the twisted pair coil is equal; the lead assembly 400 includes two lead members 410, the two lead members 410 are respectively and correspondingly fixed on the two supporting blocks 120, in one of the lead members 410, the lead member 410 includes two lead pieces 411, the two lead pieces 411 are respectively and correspondingly fixed on the two supporting blocks 120, and the two lead pieces 411 are respectively connected with two ends of one of the conducting wires 310, because of the two lead members 410, four lead pieces 411 are provided, two of the lead pieces 411 are fixed on one supporting block 120, the other two lead pieces 411 are fixed on the other supporting block 120, the two lead pieces 411 on the same supporting block 120 are used for respectively connecting with the ends of two conducting wires 310 in the same end of the twisted pair 300, thus, the conducting wires 310 in the twisted pair 300 can be printed out through the lead pieces 411, when an external circuit is connected to the lead pieces 411, the twisted-pair common-mode inductor 10 of the present invention twists two wires wound on the magnetic core 200 to form the twisted-pair 300, and then winds the twisted-pair 300 on the magnetic core 200, so as to ensure the close contact relationship between the two wires 310, and the two wires 310 are not partially overlapped, but because the two wires 310 are twisted together to form a whole, that is, the two wires 310 are overlapped in a cross manner, the two wires 310 become a twisted-pair 300 with uniform distribution, and meanwhile, the two wires 310 do not have different tightness during the winding process, thereby effectively improving the effect of the twisted-pair common-mode inductor 10 on the electromagnetic wave; in one embodiment, the conductive wire 310 is an enameled wire; in one embodiment, the lead sheet 411 is a copper foil, which is beneficial for wire connection; in one embodiment, the lead tab 411 is L-shaped, and in particular, the lead tab 411 is attached to the bottom and the side of the supporting block 120, so that the lead tab 411 is L-shaped, and the lead tab 411 is L-shaped, so that the conductive wire 310 can be connected to the side of the lead tab 411, so that the bottom of the lead tab 411 can be kept smooth, and thus the twisted wire type common mode inductor 10 can be better mounted on the circuit board.

Referring to fig. 3, in one embodiment, the magnetic core 200 is formed with a spiral groove 210, and the twisted pair 300 is accommodated in the spiral groove 210. It should be noted that, in order to prevent the twisted pair 300 from being displaced on the outer side wall of the magnetic core 200, the magnetic core 200 is provided with the spiral groove 210, and then the twisted pair 300 is wound in the spiral groove 210.

In one embodiment, the conductive wire 310 is soldered to the lead tab 411. The twisted pair 300 is wound on the magnetic core 200, and then both ends of the twisted pair 300 are connected to the lead tab 411, specifically, two wires 310 twisted in the twisted pair 300 are welded on the lead tab 411, and the welding method can ensure that the wires 310 wound on the magnetic core 200 are kept in a tight state, and prevent the wires 310 from loosening on the magnetic core 200.

Referring to fig. 1 again, in one embodiment, the leading tab 411 is provided with a wire slot 411a, and the wire 310 is accommodated in the wire slot 411 a. It should be noted that, the lead tab 411 is provided with a wire slot 411a capable of accommodating the wire 310, so that on one hand, the wire 310 is not deviated when being connected to the lead tab 411, and on the other hand, the wire 310 can be better welded to the lead tab 411.

Referring to fig. 1 and 4, the base assembly 100 further includes a wire clamping block 130, a wire clamping hole 411b is formed on the lead tab 411, the wire clamping block 130 is accommodated in the wire clamping hole 411b, and the wire clamping block 130 is connected to the conductive wire 310.

It should be noted that, the wire 310 is connected to the lead tab 411, in an embodiment, the wire 310 is connected to the wire clamping block 130, then the wire clamping block 130 is inserted into the wire clamping hole 411b, the wire clamping block 130 is pressed by the inner sidewall of the wire clamping hole 411b, so that the wire clamping block 130 can clamp the wire 310, and is fixed in the wire clamping hole 411b of the lead tab 411 by the wire clamping block 130, so that the wire clamping block 130 is quickly inserted into the wire clamping hole 411b, so as to achieve the purpose of quickly connecting the wire 310 to the lead tab 411, without welding the wire 310 to the lead tab 411, thereby increasing the flexibility of installation of the stranded common mode inductor 10, and when the wire clamping block 130 is inserted into the wire clamping hole 411b, the wire clamping block 130 pulls the wire 310, thereby enabling the wire 310 to be tightened on the surface of the magnetic core 200.

Referring to fig. 5, in one embodiment, the wire clamping block 130 is formed with a Z-shaped groove 131, and the conductive wire 310 is disposed through the Z-shaped groove 131.

It should be noted that, the wire 310 passes through the Z-shaped groove 131, and then the wire clamping block 130 is inserted into the wire clamping hole 411b, the inner side wall of the wire clamping hole 411b presses the wire clamping block 130, so that the inner side wall of the Z-shaped groove 131 presses the wire 310, and the wire 310 and the wire clamping block 130 are connected and fixed together.

Referring to fig. 5 again, in an embodiment, the wire clamping block 130 is provided with a clamping boss 132, and the clamping boss 132 is used for clamping the inner side wall of the wire clamping hole 411 b.

In one embodiment, a clamping table matched with the clamping boss 132 is disposed on the inner side wall of the wire clamping hole 411b, and the clamping boss 132 is abutted to the clamping boss for clamping, so as to prevent the wire clamping block 130 from sliding off from the side surface of the wire clamping hole 411 b.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A twisted wire common mode inductor, comprising:

2. The twisted-pair common-mode inductor according to claim 1, wherein the magnetic core has a spiral groove formed therein, and the twisted pair is received in the spiral groove.

3. The twisted common-mode inductor according to claim 1, wherein the wire is soldered to the tab.

4. The twisted wire type common mode inductor according to claim 1, wherein the lead tab is provided with a wire passing slot, and the wire is accommodated in the wire passing slot.

5. The twisted wire type common mode inductor according to claim 1, wherein the base assembly further comprises a wire clamping block, a wire clamping hole is formed on the lead tab, the wire clamping block is accommodated in the wire clamping hole, and the wire clamping block is connected with the lead.

6. The stranded common mode inductor according to claim 5, wherein the wire clamping block is provided with a Z-shaped groove, and the conducting wire penetrates through the Z-shaped groove.

7. The twisted wire type common mode inductor according to claim 5, wherein the wire clamping block is provided with a clamping boss for clamping the inner side wall of the wire clamping hole.

8. The twisted common-mode inductor according to claim 1, wherein the conducting wire is an enameled wire.

9. The twisted common-mode inductor according to claim 1, wherein the tab is a copper foil.

10. The twisted common-mode inductor according to claim 1, wherein the tab is L-shaped.