CN104795201A - Common mode inductor - Google Patents

Common mode inductor Download PDF

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Publication number
CN104795201A
CN104795201A CN201510197295.0A CN201510197295A CN104795201A CN 104795201 A CN104795201 A CN 104795201A CN 201510197295 A CN201510197295 A CN 201510197295A CN 104795201 A CN104795201 A CN 104795201A
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China
Prior art keywords
magnetic core
mode inductor
common
magnetic cores
line group
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CN201510197295.0A
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CN104795201B (en
Inventor
廖荣华
陈益芳
朱建华
高永毅
王智会
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Shenzhen Zhenhua Ferrite and Ceramic Electronics Co Ltd
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Shenzhen Zhenhua Ferrite and Ceramic Electronics Co Ltd
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Priority to CN201510197295.0A priority Critical patent/CN104795201B/en
Publication of CN104795201A publication Critical patent/CN104795201A/en
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Abstract

The invention relates to a common mode inductor. The common mode inductor comprises magnetic cores and wire windings; the magnetic cores comprise two first magnetic cores and two second magnetic cores, the two first magnetic cores are arranged oppositely, the two second magnetic cores are arranged oppositely, the two ends of each second magnetic core are connected with the two first magnetic cores adjacently to form four junction points, and metal patches are arranged along the outer walls of the first magnetic cores on the junction points perpendicular to the length direction of the first magnetic cores; the wire windings are wound around the two first magnetic cores or the two second magnetic cores, and the leading-out ends of the wire windings are connected with the metal patches in a conducting mode. According to the common mode inductor, as the two wire windings are wound around the magnetic cores, the metal patches are arranged on the corresponding magnetic cores, and the leading-out ends of the wire windings are connected with the metal patches in the conducting mode, the size of the common mode inductor is equivalent to that of the magnetic cores, and the structural characteristics of the magnetic cores are fully used; the common mode inductor is installed in a circuit through the metal patches, and the chip-type miniaturization of the common mode inductor is achieved.

Description

Common-mode inductor
Technical field
The present invention relates to inductors technique field, particularly relate to a kind of common-mode inductor.
Background technology
Inductor can be the element that magnetic energy stores electric energy conversion.Wherein common-mode inductor, is also common mode choke, is usually used in the electromagnetic interference signal of filtering common mode in the Switching Power Supply of computer.The manufacture method of conventional common-mode inductor is that direct coiling enamelled wire on magnet ring, the line exit be wound on magnet ring directly welds, and inductor becomes inserter structure.But along with the rise of Surface Mount technology, the demand of various electronic electric equipment products to Surface Mount electronic devices and components is increasing, conventional common-mode inductor can not meet the requirement in market.
Summary of the invention
Based on this, be necessary the common-mode inductor that a kind of small-sized chip type is provided.
A kind of common-mode inductor, comprising:
Magnetic core, described magnetic core comprises two the first magnetic cores and two the second magnetic cores, two described first magnetic cores are oppositely arranged, two described second magnetic cores are also oppositely arranged, formation four junction points and the two ends of each described second magnetic core all connect with one end of described first magnetic core, described first magnetic core is at described junction point and be provided with metal patch at the length direction perpendicular to described first magnetic core along outer wall; And
Line group, described line group is wound on two described first magnetic cores or on two described second magnetic cores, and the exit of described line group conducts electricity with described metal patch and is connected.
Above-mentioned common-mode inductor is coiling two groups of line groups on magnetic core, and metal patch is provided with on magnetic core, the exit of line group conducts electricity with metal patch and is connected, the size of common-mode inductor and the sizableness of magnetic core, take full advantage of the design feature of magnetic core, above-mentioned common-mode inductor is installed in circuit by metal patch, achieves the small-sized chip type of common-mode inductor.
Wherein in an embodiment, described first magnetic core is square column type, and described second magnetic core is cylindrical.
Wherein in an embodiment, described first magnetic core is being provided with groove perpendicular to its axial direction, and the exit of described line group is fitted by described groove and described first magnetic core.
Wherein in an embodiment, described line group is wound on two described second magnetic cores.
Wherein in an embodiment, described first magnetic core is being provided with groove perpendicular to its axial direction, and the exit of described line group is fitted by described groove and described first magnetic core.
Wherein in an embodiment, described junction point is in the optional position of the end except described first magnetic core.
Wherein in an embodiment, described common-mode inductor also comprises shell, and described shell comprises substrate, and described substrate is provided with weld zone, and the exit of described line group welds in described weld zone with described metal patch.
Wherein in an embodiment, described shell also comprises the holding section be located on described substrate, and described holding section engages with the end of described first magnetic core.
Wherein in an embodiment, described shell is provided with insulation division board, and described insulation division board is located between described line group.
Wherein in an embodiment, the exit of described line group welds in described weld zone with described metal patch, and some glue covers described weld zone.
Accompanying drawing explanation
Fig. 1 is the structural representation of the common-mode inductor of a better embodiment;
The substrate of Fig. 2 for the shell of the common-mode inductor shown in Fig. 1 and the schematic diagram of weld zone;
The structural representation of the side that Fig. 3 is the common-mode inductor shown in Fig. 1;
Fig. 4 is the structural representation of the another side of the common-mode inductor shown in Fig. 1.
Embodiment
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.Preferred embodiment of the present invention is given in accompanying drawing.But the present invention can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present invention more comprehensively thorough.
It should be noted that, when element is called as " being fixed on " another element, directly can there is element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may there is centering elements simultaneously.Term as used herein " vertical ", " level ", "left", "right" and similar statement are just for illustrative purposes.
With reference to Fig. 1, the common-mode inductor 10 of an execution mode, comprises magnetic core 110 and line group 120.
Magnetic core 110 comprises two the first magnetic cores 111 and two the second magnetic cores 112, two the first magnetic cores 111 are oppositely arranged, two the second magnetic cores 112 are also oppositely arranged, and adjacent with one end of two the first magnetic cores 111 respectively and formation four junction points that connect, the two ends of each second magnetic core 112, the first magnetic core 111 is at described junction point and be provided with metal patch 130 at the length direction perpendicular to the first magnetic core 111 along outer wall.
Line group 120 is wound on two the first magnetic cores 111 or on two the second magnetic cores 112, and the exit of line group 120 conducts electricity with metal patch 130 and is connected.
Above-mentioned common-mode inductor 10 is coiling two groups of line groups 120 on magnetic core 110, and metal patch 130 is provided with on magnetic core 110, the exit of line group 120 conducts electricity with metal patch 130 and is connected, the size of common-mode inductor 10 and the sizableness of magnetic core 110, take full advantage of the design feature of magnetic core 110, above-mentioned common-mode inductor 10 is installed in circuit by metal patch 130, achieves the small-sized chip type of common-mode inductor 10.
Especially, metal patch 130 is the zinc-plated material of copper, and can increase solderability when not affecting electric conductivity on the one hand, it is anti-oxidation in addition, Anti-tarnish property is good, has the color as copper-nickel alloy, can reach effect attractive in appearance.
Particularly, in the present embodiment, two the first magnetic cores 111 are parallel to be oppositely arranged, and two the second magnetic cores 112 are also parallel to be oppositely arranged, and the first magnetic core 111 and the second magnetic core 112 intersect vertically.
Wherein in an embodiment, the first magnetic core 111 is square column type, and the second magnetic core 112 is cylindrical, and line group 120 is wound on two the second magnetic cores 112.Square column type core structure is stablized, and cylinder shape magnetic core is conducive to tight coiling line group 120 thus reduces the volume of common-mode inductor 10, so makes magnetic core 110 stablize by holding structure, is convenient to again coiling line group 120.
Particularly, in the present embodiment, metal patch 130 is located at three outer walls of the first magnetic core 111 in described junction point radial direction, two namely adjacent with face, place, junction point faces and a face relative with face, place, junction point.Particularly, metal patch 130 is buckled in face, place, junction point.
Particularly, in the present embodiment, line group 120 is wound on two the second magnetic cores 112.Particularly, in the present embodiment, first magnetic core 111 is being provided with groove 1110 perpendicular to its axial direction, the reach the standard grade exit of group 120 of second magnetic core 112 is fitted by groove 1110 and the first magnetic core 111, add the contact-making surface of exit and magnetic core 110, thus strengthen the connection of exit and magnetic core 110.
Especially, line group 120 adopts flat wire, covers dielectric film Copper Foil or enamel covered wire is made.Particularly, in the present embodiment, line group 120 adopts flat wire to be closely wound on the second magnetic core 112, reduces the internal resistance of common-mode inductor 10, increases through the electric current of line group 120, common-mode inductor 10 is met D.C. resistance is little, rated current is large requirement.
Wherein in an embodiment, magnetic core 110 is ferrite soft magnetic, amorphous soft magnet or ultracrystallite soft magnetism.Particularly, magnetic core 110 is FERRITE CORE, FERRITE CORE can ensure under higher magnetic permeability, there is good temperature coefficient (speed that the physical attribute of material changes along with variations in temperature), thus can work under higher and lower working temperature, loss is low, and after employing FERRITE CORE, the number of turns of line group 120 can be reduced thus greatly reduce the volume of common-mode inductor 10.
See figures.1.and.2, wherein in an embodiment, common-mode inductor 10 also comprises shell 140, and shell 140 comprises substrate 141, and substrate 141 is provided with weld zone 142, and the exit of line group 120 welds in weld zone 142 with metal patch 130.Shell 140 pairs of magnetic cores 110 and line group 120 play protection and the effect of insulating.
Wherein in an embodiment, shell 140 adopts LCP (Liquid Crystal Polymer, polymeric liquid crystal copolymer) material makes, thus makes shell 140 have good electrical insulation capability and arc resistance, thus improve the performance of above-mentioned common-mode inductor 10.
Continue with reference to Fig. 1, particularly, in the present embodiment, junction point is in the optional position of the end except the first magnetic core 111, and the end of the first magnetic core 111 is connected with shell 140.Owing to not easily fixing with shell 140 in close-shaped magnetic core, therefore by the end of the first magnetic core 111, the convenient connection with shell 140.
With reference to Fig. 1 and Fig. 3, particularly, in the present embodiment, shell 140 also comprises the holding section 143 be located on substrate 141, and holding section 143 engages with the end of the first magnetic core 111.Particularly, in the present embodiment, shell 140 is rectangular.More specifically, holding section 143 is positioned at the position at four angles of shell 140, avoids coated for whole magnetic core 110, is conducive to saving the material of shell 140 and the heat radiation of line group 120.
With reference to Fig. 1 and Fig. 4, wherein in an embodiment, shell 140 is provided with insulation division board 144, and insulation division board 144 is located between two line groups 120.Particularly, in this enforcement, insulation division board 144 is substantially vertical with the surface at place, weld zone 142, and shell 140 and insulation division board 144 are global formation.Particularly, in this enforcement, the groove 1110 of the first magnetic core 111 is passed at the two ends of insulation division board 144.
Wherein in an embodiment, the exit of line group 120 is with metal patch 130 after weld zone 142 welds, and some glue covers weld zone 142, and reinforcing is welded and played the effect of insulated barriers further.Especially, the glue putting glue used is epoxy resin.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification is recorded.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.

Claims (10)

1. a common-mode inductor, is characterized in that, comprising:
Magnetic core, described magnetic core comprises two the first magnetic cores and two the second magnetic cores, two described first magnetic cores are oppositely arranged, two described second magnetic cores are also oppositely arranged, and adjacent and formation four junction points that connect, one end of the two ends of each described second magnetic core first magnetic core described with two respectively, described first magnetic core is at described junction point and be provided with metal patch at the length direction perpendicular to described first magnetic core along outer wall; And
Line group, described line group is wound on two described first magnetic cores or on two described second magnetic cores, and the exit of described line group conducts electricity with described metal patch and is connected.
2. common-mode inductor according to claim 1, is characterized in that, described first magnetic core is square column type, and described second magnetic core is cylindrical.
3. common-mode inductor according to claim 2, is characterized in that, described metal patch is located at two faces adjacent with face, place, junction point on described first magnetic core and a face relative with face, place, junction point.
4. common-mode inductor according to claim 2, is characterized in that, described line group is wound on two described second magnetic cores.
5. common-mode inductor according to claim 4, is characterized in that, described first magnetic core is being provided with groove perpendicular to its axial direction, and the exit of described line group is fitted by described groove and described first magnetic core.
6. common-mode inductor according to claim 1, is characterized in that, described junction point is in the optional position of the end except described first magnetic core.
7. common-mode inductor according to claim 1, is characterized in that, described common-mode inductor also comprises shell, and described shell comprises substrate, and described substrate is provided with weld zone, and the exit of described line group welds in described weld zone with described metal patch.
8. common-mode inductor according to claim 7, is characterized in that, described shell also comprises the holding section be located on described substrate, and described holding section engages with the end of described first magnetic core.
9. common-mode inductor according to claim 7, is characterized in that, described shell is provided with insulation division board, and described insulation division board is located between described line group.
10. common-mode inductor according to claim 7, is characterized in that, the exit of described line group welds in described weld zone with described metal patch, and some glue covers described weld zone.
CN201510197295.0A 2015-04-23 2015-04-23 Common-mode inductor Active CN104795201B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110319010A (en) * 2018-03-30 2019-10-11 株式会社丰田自动织机 Vehicle-mounted motor compressor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2906862Y (en) * 2006-01-20 2007-05-30 耀钻科技股份有限公司 Inductor structure that can improve installation efficiency
JP2010010425A (en) * 2008-06-27 2010-01-14 Shindengen Electric Mfg Co Ltd Method of manufacturing inductor
CN102097200A (en) * 2010-12-20 2011-06-15 深圳顺络电子股份有限公司 Core column component of winding type pasted electronic element and manufacturing method thereof
CN102360727A (en) * 2011-11-10 2012-02-22 唐山尚新融大电子产品有限公司 Plane magnetic integrated electro magnetic interference (EMI) filter
CN202443821U (en) * 2012-02-28 2012-09-19 常州纽科电子有限公司 Three-axis integrated low-frequency awakening inductor
CN103489567A (en) * 2013-09-13 2014-01-01 华为技术有限公司 Common mode inductor
CN204668076U (en) * 2015-04-23 2015-09-23 深圳振华富电子有限公司 Common-mode inductor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2906862Y (en) * 2006-01-20 2007-05-30 耀钻科技股份有限公司 Inductor structure that can improve installation efficiency
JP2010010425A (en) * 2008-06-27 2010-01-14 Shindengen Electric Mfg Co Ltd Method of manufacturing inductor
CN102097200A (en) * 2010-12-20 2011-06-15 深圳顺络电子股份有限公司 Core column component of winding type pasted electronic element and manufacturing method thereof
CN102360727A (en) * 2011-11-10 2012-02-22 唐山尚新融大电子产品有限公司 Plane magnetic integrated electro magnetic interference (EMI) filter
CN202443821U (en) * 2012-02-28 2012-09-19 常州纽科电子有限公司 Three-axis integrated low-frequency awakening inductor
CN103489567A (en) * 2013-09-13 2014-01-01 华为技术有限公司 Common mode inductor
CN204668076U (en) * 2015-04-23 2015-09-23 深圳振华富电子有限公司 Common-mode inductor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110319010A (en) * 2018-03-30 2019-10-11 株式会社丰田自动织机 Vehicle-mounted motor compressor

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