CN103258624A - Mixed magnetic circuit inductor - Google Patents
Mixed magnetic circuit inductor Download PDFInfo
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- CN103258624A CN103258624A CN2013101753738A CN201310175373A CN103258624A CN 103258624 A CN103258624 A CN 103258624A CN 2013101753738 A CN2013101753738 A CN 2013101753738A CN 201310175373 A CN201310175373 A CN 201310175373A CN 103258624 A CN103258624 A CN 103258624A
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- circuit inductor
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Abstract
The invention relates to a mixed magnetic circuit inductor which comprises a magnetic core and a coil. The magnetic core comprises a first square-shaped magnetic core and a second square-shaped magnetic core which is located in the first magnetic core. Two end faces of the second magnetic core are respectively connected with a connecting face corresponding to the inner side wall of the first magnetic core, and the coil is wound on the second magnetic core. The first magnetic core is made of metal soft magnetism powder, and the magnetic permeability is less than 500H/m. The second magnetic core is made of ferrite, and the magnetic permeability is larger than 1500H/m. The ratio of the length, perpendicular to the direction of the second magnetic core, of the first magnetic core to the width, parallel to the direction of the second magnetic core, of the first magnetic core is larger than 1.2.
Description
Technical field
The present invention relates to a kind of inductor, especially relate to a kind of mixed magnetic circuit inductor.
Background technology
Inductor is one of primary element in the circuit.Common inductor is to be formed by coil winding.In order to increase the quality factor of inductance value and raising coil, coil can be by coiling to magnetic core.The material of magnetic core has significant effects to the performance of inductor.In many materials, Ferrite Material is the core material of comparatively using always.Ferrite Material has high magnetic permeability, thereby is conducive to make bigger inductance.But Ferrite Material also has than being easier to this desired characteristics not of magnetic saturation.In order to overcome this deficiency, a kind of solution is to use larger sized magnetic core, but this has improved the cost of inductor, also is unfavorable for the installation of inductor on circuit board.Another solution is to mark air gap at Ferrite Material, but for preventing that magnetic core is saturated, and the air gap size that artificial goes out is bigger, can reduce the performance index of the loss etc. of inductor on the contrary.
Summary of the invention
The invention provides a kind of mixed magnetic circuit inductor, introduce the core material that a kind of process selects and overcome the problem that simple use Ferrite Material causes.
The present invention is that to solve the problems of the technologies described above the technical scheme that adopts be to propose a kind of mixed magnetic circuit inductor, comprises magnetic core and coil.Described magnetic core comprises first magnetic core of square shape and is positioned at second magnetic core of the clavate of this first magnetic core that the both ends of the surface of described second magnetic core are connected to the joint face of the madial wall correspondence position of described first magnetic core, are wound with coil on described second magnetic core.The material of described first magnetic core is the soft magnetic metal powder, and permeability is less than 500H/m, and the material of described second magnetic core is ferrite, and permeability is greater than 1500H/m.Described first magnetic core is in the length perpendicular to the direction of described second magnetic core, with at the ratio of the width of the direction that is parallel to described second magnetic core greater than 1.2.
In one embodiment of this invention, the madial wall of the described joint face of described first magnetic core and described first magnetic core maintains an equal level.
In one embodiment of this invention, the described joint face of described first magnetic core protrudes from the madial wall of described first magnetic core.
In one embodiment of this invention, the described joint face of described first magnetic core concaves from the madial wall of described first magnetic core.
In one embodiment of this invention, it is characterized in that having width less than the air gap pad of 0.5mm between at least one end face of described second magnetic core and the described joint face of described first magnetic core.
In one embodiment of this invention, described air gap pad is made of bonding agent.
In one embodiment of this invention, described air gap pad is made of insulating material.
In one embodiment of this invention, described second magnetic core has the air gap pad.
In one embodiment of this invention, described soft magnetic metal powder is iron powder, iron aluminum silicon powder, iron silica flour or Fe-based amorphous powder.
In one embodiment of this invention, described coil is by copper cash, copper-clad aluminum conductor or aluminum steel coiled.
Mixed magnetic circuit inductor of the present invention has FERRITE CORE and soft magnetic metal powder core simultaneously.Compare with FERRITE CORE, the magnetic core inside that the soft magnetic metal powder constitutes has many small air gaps, so magnetic core is more difficult saturated.Like this, the soft magnetic metal powder core needn't have FERRITE CORE big volume like that, nor can be because excessive air gap causes performance decrease.Therefore size and the cost of inductor of the present invention are under control, and performance also is guaranteed simultaneously.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 illustrates the structural representation of the mixed magnetic circuit inductor of first embodiment of the invention.
Fig. 2 illustrates the magnetic circuit of mixed magnetic circuit inductor embodiment illustrated in fig. 1.
Fig. 3 illustrates the structural representation of the mixed magnetic circuit inductor of second embodiment of the invention.
Fig. 4 illustrates the structural representation of the mixed magnetic circuit inductor of third embodiment of the invention.
Fig. 5 illustrates the structural representation of the mixed magnetic circuit inductor of fourth embodiment of the invention.
Embodiment
Fig. 1 illustrates the structural representation of the mixed magnetic circuit inductor of first embodiment of the invention.With reference to shown in Figure 1, the inductor 10 of present embodiment is " day " font structure substantially.The magnetic core of inductor 10 comprises first magnetic core 11 of peripheral square shape and second magnetic core 12 of its inner clavate.The length of second magnetic core 12 can just be the inner chamber width of first magnetic core 11.Like this, the joint face 11a on the madial wall correspondence position of the both ends of the surface 12a of second magnetic core 12 and first magnetic core 11 contacts.In the present embodiment, the madial wall of the joint face 11a of first magnetic core 11 and described first magnetic core 11 maintains an equal level just.
Second magnetic core 12 can be positioned at the central authorities of first magnetic core 11 just, also can depart to some extent.Be wound with coil 13 at second magnetic core 12.
Can be connected by various fixed forms between second magnetic core 12 and first magnetic core 11, for example a spot of bonding agent.Bonding agent may cause air gap, but this does not influence the performance of inductor.In some application scenario, air gap may be wished.
In the present embodiment, the material of first magnetic core 11 is the soft magnetic metal powder, and permeability is less than 500H/m.The material of second magnetic core 12 is ferrite, and permeability is greater than 1500H/m.If first magnetic core 11 is length L in the direction (being vertical direction among the figure) perpendicular to second magnetic core 12, be width W in the direction that is parallel to second magnetic core 12 (being horizontal direction among the figure), then L/W is greater than 1.2.
In an embodiment of the present invention, the soft magnetic metal powder can be iron powder, iron aluminum silicon powder, iron silica flour or Fe-based amorphous powder.Mode by compacting makes the soft magnetic metal powder constitute first magnetic core 11.
Fig. 2 illustrates the magnetic circuit of mixed magnetic circuit inductor embodiment illustrated in fig. 1.With reference to shown in Figure 2, second magnetic core 12 of clavate provides for coiling coil 13 thereon and concentrates magnetic circuit as shown in phantom in FIG., makes it to constitute two mixed type magnetic flux loops with first magnetic core 11 of square shape and realizes in parallel.
Compare with FERRITE CORE, the magnetic core inside that the soft magnetic metal powder constitutes has many small air gaps, so magnetic core is more difficult saturated.Like this, the soft magnetic metal powder core needn't have FERRITE CORE big volume like that as first magnetic core 11 in the present embodiment, nor can be because excessive air gap causes performance decrease.Therefore size and the cost of the inductor of present embodiment are under control, and performance also is guaranteed simultaneously.
Fig. 3 illustrates the structural representation of the mixed magnetic circuit inductor of second embodiment of the invention.Compare with first embodiment, the mixed magnetic circuit inductor 20 of present embodiment still comprises the coil that first magnetic core 21, second magnetic core 22 and figure do not show.The joint face 21a of first magnetic core 21 protrudes from the madial wall of first magnetic core.In addition, the length of second magnetic core 22 slightly is shorter than the inner chamber width of first magnetic core 21, thereby has formed air gap pad 24 between the both ends of the surface 22a of second magnetic core 22 and corresponding joint face 21a.This air gap pad can be made of bonding agent or other insulating material.In one embodiment, each air gap pad width is less than 0.5mm.
The benefit of introducing the air gap pad is, can prevent second magnetic core 12 saturated of Ferrite Material.
Fig. 4 illustrates the structural representation of the mixed magnetic circuit inductor of third embodiment of the invention.Compare with first embodiment, the mixed magnetic circuit inductor 30 of present embodiment still comprises the coil that first magnetic core 31, second magnetic core 32 and figure do not show.Different is that the joint face 31a of first magnetic core 31 concaves from the madial wall of first magnetic core.In addition, the length of second magnetic core 32 slightly is shorter than the inner chamber width of first magnetic core 31, thereby has formed air gap pad 34 between the both ends of the surface 32a of second magnetic core 32 and corresponding joint face 31a.This air gap pad can be made of bonding agent or other insulating material.In one embodiment, each air gap pad width is less than 0.5mm.
Although in the above-mentioned second and the 3rd embodiment, the number of air gap pad is two, namely between the both ends of the surface of second magnetic core and the corresponding joint face air gap pad is arranged all.But be appreciated that the air gap pad can exist only between the wherein end face and corresponding joint face of second magnetic core.This moment, the width of air gap pad can be less than 1mm.
Fig. 5 illustrates the structural representation of the mixed magnetic circuit inductor of fourth embodiment of the invention.Compare with first embodiment, the mixed magnetic circuit inductor of present embodiment has the coil that first magnetic core 41 and second magnetic core 42 and figure do not show equally.Different is that second magnetic core 42 has two air gap pad 42a, 42b.This air gap pad can be made of bonding agent or other insulating material.
In the various embodiments described above of the present invention, coil can be by copper cash, copper-clad aluminum conductor or aluminum steel coiled.Wherein, aluminum steel has lower price, and uses in the present invention, still satisfies the performance requirement of inductor.Therefore the use of aluminum steel can further reduce cost.
Though the present invention describes with reference to current specific embodiment, but those of ordinary skill in the art will be appreciated that, above embodiment illustrates the present invention, under the situation that does not break away from spirit of the present invention, also can make variation or the replacement of various equivalences, therefore, as long as in connotation scope of the present invention in the scope to the variation of above-described embodiment, claims that modification all will drop on the application.
Claims (10)
1. mixed magnetic circuit inductor, comprise magnetic core and coil, it is characterized in that, described magnetic core comprises first magnetic core of square shape and is positioned at second magnetic core of the clavate of this first magnetic core, the both ends of the surface of described second magnetic core are connected to the joint face of the madial wall correspondence position of described first magnetic core, be wound with coil on described second magnetic core, wherein:
The material of described first magnetic core is the soft magnetic metal powder, and permeability is less than 500H/m, and the material of described second magnetic core is ferrite, and permeability is greater than 1500H/m;
Described first magnetic core is in the length perpendicular to the direction of described second magnetic core, with at the ratio of the width of the direction that is parallel to described second magnetic core greater than 1.2.
2. mixed magnetic circuit inductor as claimed in claim 1 is characterized in that, the described joint face of described first magnetic core and the madial wall of described first magnetic core maintain an equal level.
3. mixed magnetic circuit inductor as claimed in claim 1 is characterized in that, the described joint face of described first magnetic core protrudes from the madial wall of described first magnetic core.
4. mixed magnetic circuit inductor as claimed in claim 1 is characterized in that, the described joint face of described first magnetic core concaves from the madial wall of described first magnetic core.
5. as each described mixed magnetic circuit inductor of claim 1-3, it is characterized in that having width less than the air gap pad of 0.5mm between at least one end face of described second magnetic core and the described joint face of described first magnetic core.
6. mixed magnetic circuit inductor as claimed in claim 5 is characterized in that, described air gap pad is made of bonding agent.
7. mixed magnetic circuit inductor as claimed in claim 5 is characterized in that, described air gap pad is made of insulating material.
8. mixed magnetic circuit inductor as claimed in claim 1 is characterized in that, described second magnetic core has the air gap pad.
9. mixed magnetic circuit inductor as claimed in claim 1 is characterized in that, described soft magnetic metal powder is iron powder, iron aluminum silicon powder, iron silica flour or Fe-based amorphous powder.
10. mixed magnetic circuit inductor as claimed in claim 1 is characterized in that, described coil is by copper cash, copper-clad aluminum conductor or aluminum steel coiled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101753738A CN103258624A (en) | 2013-05-13 | 2013-05-13 | Mixed magnetic circuit inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101753738A CN103258624A (en) | 2013-05-13 | 2013-05-13 | Mixed magnetic circuit inductor |
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| CN103258624A true CN103258624A (en) | 2013-08-21 |
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| CN2013101753738A Pending CN103258624A (en) | 2013-05-13 | 2013-05-13 | Mixed magnetic circuit inductor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103714946A (en) * | 2014-01-20 | 2014-04-09 | 田村（中国）企业管理有限公司 | Magnetic integrated inductor with mixed magnetic circuit |
| CN104979064A (en) * | 2014-04-08 | 2015-10-14 | 浙江科达磁电有限公司 | EPQ type magnetic core and magnetic inductance element containing same |
| CN105097223A (en) * | 2015-09-21 | 2015-11-25 | 杭州中恒电气股份有限公司 | Hybrid magnetic circuit inductor |
| WO2021258352A1 (en) * | 2020-06-24 | 2021-12-30 | 华为技术有限公司 | Electrical component, circuit board, and switching power supply |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6980077B1 (en) * | 2004-08-19 | 2005-12-27 | Coldwatt, Inc. | Composite magnetic core for switch-mode power converters |
| CN1996515A (en) * | 2006-01-06 | 2007-07-11 | 三星电子株式会社 | Magnetic core, and inductor and transformer comprising the same |
| CN201233792Y (en) * | 2008-05-09 | 2009-05-06 | 厦门南磁电子有限公司 | Magnetic core combining a magnetic body in square shape and a magnetic body in I shape |
| CN101521089A (en) * | 2008-11-19 | 2009-09-02 | 清流县鑫磁线圈制品有限公司 | Inductor and manufacturing method thereof |
| CN102956344A (en) * | 2012-11-02 | 2013-03-06 | 华为技术有限公司 | Composite magnetic core structure and magnetic element |
-
2013
- 2013-05-13 CN CN2013101753738A patent/CN103258624A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6980077B1 (en) * | 2004-08-19 | 2005-12-27 | Coldwatt, Inc. | Composite magnetic core for switch-mode power converters |
| CN1996515A (en) * | 2006-01-06 | 2007-07-11 | 三星电子株式会社 | Magnetic core, and inductor and transformer comprising the same |
| CN201233792Y (en) * | 2008-05-09 | 2009-05-06 | 厦门南磁电子有限公司 | Magnetic core combining a magnetic body in square shape and a magnetic body in I shape |
| CN101521089A (en) * | 2008-11-19 | 2009-09-02 | 清流县鑫磁线圈制品有限公司 | Inductor and manufacturing method thereof |
| CN102956344A (en) * | 2012-11-02 | 2013-03-06 | 华为技术有限公司 | Composite magnetic core structure and magnetic element |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103714946A (en) * | 2014-01-20 | 2014-04-09 | 田村（中国）企业管理有限公司 | Magnetic integrated inductor with mixed magnetic circuit |
| WO2015106594A1 (en) * | 2014-01-20 | 2015-07-23 | 田村（中国）企业管理有限公司 | Hybrid excitation magnetic integrated inductor |
| CN103714946B (en) * | 2014-01-20 | 2016-02-24 | 田村（中国）企业管理有限公司 | Mixed magnetic circuit magnetic integrated inductor |
| CN104979064A (en) * | 2014-04-08 | 2015-10-14 | 浙江科达磁电有限公司 | EPQ type magnetic core and magnetic inductance element containing same |
| CN105097223A (en) * | 2015-09-21 | 2015-11-25 | 杭州中恒电气股份有限公司 | Hybrid magnetic circuit inductor |
| WO2021258352A1 (en) * | 2020-06-24 | 2021-12-30 | 华为技术有限公司 | Electrical component, circuit board, and switching power supply |
| EP4152351A4 (en) * | 2020-06-24 | 2023-07-26 | Huawei Technologies Co., Ltd. | Electrical component, circuit board, and switching power supply |
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| C06 | Publication | ||
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| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Shao Geliang Inventor before: Shao Geliang Inventor before: Saeki Hideto |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: SHAO GELIANG SAEKI HIDETO TO: SHAO GELIANG |
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| C12 | Rejection of a patent application after its publication | ||
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Application publication date: 20130821 |