CN104517700A - Common mode choke - Google Patents
Common mode choke Download PDFInfo
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- CN104517700A CN104517700A CN201410493488.6A CN201410493488A CN104517700A CN 104517700 A CN104517700 A CN 104517700A CN 201410493488 A CN201410493488 A CN 201410493488A CN 104517700 A CN104517700 A CN 104517700A
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Abstract
The invention aims to provide a common mode choke which can obtain high characteristic impedance without arrangement of an interval between two windings. The common mode choke (1) has a magnetic core (12) extending along an x axis direction, a winding (20) wound on a core winding part (14) of the magnetic core (12), and a winding (21) wound on the core winding part (14) in the way of being parallel to the winding (20). When observed from a z axis direction orthogonal to the x axis direction, an overlap part (alpha) of the winding (21) overlaps with the winding (20). In addition, the part of the winding (21) except the overlap part (alpha) is arranged roughly parallel to the x axis direction relative to the winding (20).
Description
Technical field
The present invention relates to common mode choke (Common mode choke coil).
Background technology
As common mode choke in the past, there will be a known the common mode choke described in patent documentation 1.In this common mode choke in the past, by arranging interval between 2 windings being wound in core portion, obtain high characteristic impedance.
But, in common mode choke in the past, owing to arranging interval between 2 windings, the such problem of many numbers of turn cannot be obtained so exist in the space in limited core portion.
Patent documentation 1: Japan Patent No. 3973027 publication
Summary of the invention
The object of the invention is to, a kind of common mode choke that can obtain high characteristic impedance is provided.
The feature of the common mode choke involved by a mode of the present invention is to possess:
Magnetic core, it has the core portion extended vertically;
1st winding, it is wound in above-mentioned core portion; And
2nd winding, it is wound in above-mentioned core portion in the mode parallel with above-mentioned 1st winding,
When observing from the direction orthogonal with above-mentioned axis, a part for above-mentioned 2nd winding is overlapping with above-mentioned 1st winding,
The remainder of above-mentioned 2nd winding arranges with axial substantially in parallel relative to above-mentioned 1st winding.
In the common mode choke involved by a mode of the present invention, be wound in a part for the 2nd winding in core portion in the mode walked abreast with the 1st winding, when observing from the direction orthogonal with the axis in core portion, overlapping with above-mentioned 1st winding.Thereby, it is possible to do not arrange interval between the 1st winding and the 2nd winding, just obtain high characteristic impedance.
According to the present invention, interval can not be set between 2 windings in common mode choke and just obtain high characteristic impedance.
Accompanying drawing explanation
Fig. 1 is the outside drawing of the common mode choke of an embodiment.
Fig. 2 is the profile of the common mode choke in manufacture process.
Fig. 3 is the profile of the common mode choke in manufacture process.
Fig. 4 is the profile of the common mode choke in manufacture process.
Fig. 5 is the outside drawing of the common mode choke of variation.
Fig. 6 be represent the sample suitable with the common mode choke of an embodiment and as in the sample of the common mode choke of comparative example, the curve chart of relation between characteristic impedance and frequency.
Fig. 7 is the outside drawing of the coiled pipe type electronic unit of variation.
Fig. 8 be represent the sample suitable with the common mode choke of an embodiment and as in the sample of the common mode choke of comparative example, the curve chart of relation between characteristic impedance and frequency.
Fig. 9 is the outside drawing of the coiled pipe type electronic unit as variation.
Description of reference numerals: 1,1A, 1B ... common mode choke; 12 ... magnetic core; 14 ... core portion; 18 ... flange part; 21 ... winding (the 1st winding, the 2nd winding).
Embodiment
(structure of common mode choke, with reference to Fig. 1)
With reference to accompanying drawing, the common mode choke 1 involved by one embodiment is described.Below, the direction that the central shaft in core portion 14 extends is defined as x-axis direction.In addition, when overlooking from x-axis direction, the direction that the long limit along flange part 16 extends being defined as y-axis direction, the direction that the minor face along flange part 16 extends is defined as z-axis direction.Wherein, x-axis, y-axis and z-axis are mutually orthogonal.
As shown in Figure 1, common mode choke 1 possesses magnetic core 12, winding 20,21 and outer electrode 22 ~ 25.
Magnetic core 12 is such as made up of magnetic material, insulating material such as ferrite (ferrite), metallic magnetic gonosome, aluminium oxide, comprises core portion 14 and flange part 16,18.
Core portion 14 is the parts of the prism-shaped extended along the x-axis direction.But core portion 14 is not limited to prism-shaped, also can be cylindric.
Flange part 16,18 is arranged on the two ends in the x-axis direction in core portion 14.Specifically, flange part 16 is arranged on one end of the negative direction side in the x-axis direction in core portion 14.Flange part 18 is arranged on the other end of the positive direction side in the x-axis direction in core portion 14.
Flange part 16 is in rectangular-shaped shape.In addition, on the face S1 of the positive direction side in the z-axis direction of flange part 16, the mode that protuberance 16a, 16b are arranged in order towards positive direction side according to the negative direction side from y-axis direction is arranged.In addition, protuberance 16a, 16b is with spaced apart thus mutually non-touching state alignment.If protuberance 16a overlooks from z-axis direction, in substantially rectangular shape, be positioned at the limit L1 of the positive direction side in x-axis direction, be positioned at y-axis direction positive direction side limit L2 formed by angle be implemented chamfering.In addition, the face S2 of the positive direction side in the z-axis direction of protuberance 16a is plane.If protuberance 16b overlooks from z-axis direction, rectangular shape, the face S3 of the positive direction side in the z-axis direction of protuberance 16b is plane.
Flange part 18 is in rectangular-shaped shape.In addition, on the face S4 of the positive direction side in the z-axis direction of flange part 18, the mode that protuberance 18a, 18b are arranged in order towards positive direction side according to the negative direction side from y-axis direction is arranged.In addition, protuberance 18a, 18b is with spaced apart thus mutually non-touching state alignment.If protuberance 18a overlooks from z-axis direction, rectangular shape, the face S5 of the positive direction side in the z-axis direction of protuberance 18a is plane.If protuberance 18b overlooks from z-axis direction, in substantially rectangular shape, formed by the limit L4 of the limit L3 being positioned at the negative direction side in x-axis direction and the negative direction side that is positioned at y-axis direction, angle is implemented chamfering.In addition, the face S6 of the positive direction side in the z-axis direction of protuberance 18b is plane.
In addition, flange part 16,18 is about by the center in core portion 14 and the straight line parallel with z-axis is symmetrical.
Outer electrode 22 ~ 25 is made up of Ni series alloy, Ag, Cu, Sn etc. such as Ni-Cr, Ni-Cu, Ni.Outer electrode 22 is arranged with the face S2 and mode around thereof that cover protuberance 16a.Outer electrode 23 is arranged with the face S3 and mode around thereof that cover protuberance 16b.Outer electrode 24 is arranged with the face S5 and mode around thereof that cover protuberance 18a.Outer electrode 25 is arranged with the face S6 and mode around thereof that cover protuberance 18b.
Winding 20,21 is the wires being wound in core portion 14, by covering with the insulating material such as polyurethane with the conductive material such as steel, silver as the heart yearn of main component and being formed.
Winding 20 (the 1st winding) is with counterclockwise around while the mode entered to the positive direction skidding in x-axis direction is wound in core portion 14 on one side when overlooking from the positive direction side in x-axis direction.One end of the negative direction side in the x-axis direction of winding 20 is connected with outer electrode 22 on the S2 of face, and the other end of the positive direction side in the x-axis direction of winding 20 is connected with outer electrode 24 on the S5 of face.
Winding 21 (the 2nd winding) is wound in core portion 14 according to the mode parallel with winding 20.That is, winding 21 is with counterclockwise around while the mode entered to the positive direction skidding in x-axis direction is wound in core portion 14 on one side when overlooking from the positive direction side in x-axis direction.In addition, one end of the negative direction side in the x-axis direction of winding 21 is connected with outer electrode 23 on the S3 of face, and the other end of the positive direction side in the x-axis direction of winding 21 is connected with outer electrode 25 on the S6 of face.
And winding 21 is when observing from z-axis direction (direction orthogonal with x-axis direction), and its part is overlapping at 2 places with winding 20.Part overlapping with winding 21 for this winding 20 is called overlapping portion α.In addition, the part (remainder) except the α of overlapping portion in winding 21, is wound in core portion 14 according to relative to winding 20 mode that (with axially parallel) arranges along the x-axis direction.Wherein, at overlapping portion α, winding 20 is exchanged with the position relationship in the x-axis direction of winding 21.Position relationship exchange after winding 20 and winding 21 to reel in core portion 14 certain distance with this state, after this, winding 20 is again overlapping with winding 21, and the position relationship of winding 20 and winding 21 reduces.
(function of coiled pipe type electronic unit)
In the coiled pipe type electronic unit 1 formed like that above, there is the function of following explanation.
In coiled pipe type electronic unit 1, the mutual central shaft being arranged to winding 20,21 is consistent, so the magnetic flux produced by the electric current flowing into winding 20 is by winding 21, and the magnetic flux produced by the electric current flowing into winding 21 is by winding 20.
At this moment, the direction of the magnetic flux produced by the electric current of common mode is identical direction.Therefore, be each one at the magnetic flux of winding 20,21 generation and mutually strengthen, thus impedance is produced to the electric current of common mode.
On the other hand, when flowing through the electric current of normal mode (normal mode), be opposite direction at winding 20 magnetic flux produced and the magnetic flux produced at winding 21.Therefore, relative to the electric current of normal mode, impedance is not produced.According to more than, coiled pipe type electronic unit 1 plays a role as common mode choke.
(manufacture method of coiled pipe type electronic unit is with reference to Fig. 2 ~ Fig. 4)
Below, the manufacture method of the coiled pipe type electronic unit of embodiment is described.
First, what prepare to become the material of magnetic core 12 take ferrite as the powder of main component.Then, the ferrite dust of preparation is filled to die.With punch, the powder after filling is pressurizeed, form the shape in core portion 14 and the shape of flange part 16,18 thus.
Next, fire after core portion 14 and the shaping end of flange part 16,18, complete magnetic core 12.
Then, outer electrode 22 ~ 25 is formed at protuberance 16a, 16b, 18a, 18b of the flange part 16,18 of magnetic core 12.Specifically, first, protuberance 16a, 16b, 18a, 18b be impregnated in and fill with the container that Ag sticks with paste (paste), Ag is stuck with paste and is attached to each recess.Next, make the Ag of attachment stick with paste dry and fire, form the Ag film as bottom electrode at protuberance 16a, 16b, 18a, 18b thus.Then, by plating etc., Ag film forms the metal film of Ni series alloy.According to more than, formed outer electrode 22 ~ 25.
Next, reel to the core portion 14 of magnetic core 12 winding 20,21.Reel winding 20,21 time, as shown in Figure 2, change the interval of the part in the x-axis direction of winding 20 and winding 21, the winding of any one party mode overlapping with the winding of the opposing party reels.Then, ormal weight is drawn from core portion 14 in advance in the two ends of winding 20,21.Wherein, according to winding time winding 20,21 and core portion tightlock status, reel time winding interval etc. each other, exist as shown in Figure 3, the situation (the present embodiment) that the position relationship in the x-axis direction of winding 20 and winding 21 is fully exchanged, as shown in Figure 4, winding 20 is overlapping with winding 21, but the situation that the position relationship of winding 20 and winding 21 is not exclusively exchanged (the 2nd variation described later).
Finally, be connected with outer electrode 22 ~ 25 by the extension of thermocompression bonding by winding 20,21.Through operation such above, complete coiled pipe type electronic unit 1.
(effect is with reference to Fig. 1, Fig. 5 and Fig. 6)
In common mode choke 1, be wound in the winding 21 in core portion 14 in the mode parallel with winding 20, when observing from the direction orthogonal with x-axis direction, in its overlapping portion, α is overlapping with winding 20.Thereby, it is possible to do not arrange interval between winding 20 and winding 21, just obtain high characteristic impedance.
The present application person is in order to confirm that above-mentioned effect is tested.Specifically, experiment uses 1st sample suitable with common mode choke 1, overlapping portion α as shown in Figure 5 to measure characteristic impedance than the 2nd sample of the variation of many 2 of the 1st sample and from the 3rd sample that overlapping portion α deleted by the 1st sample.Wherein, the size of each sample is 2.0mm × 1.2mm × 0.9mm.
The result of experiment, as shown in Figure 6, in the scope of 40MHz ~ 200MHz, relative to the characteristic impedance of the 3rd sample, about high 5 Ω of characteristic impedance of the 1st sample, relative to the characteristic impedance of the 1st sample, about high 5 Ω of characteristic impedance of the 2nd sample.In other frequencies also: relative to the characteristic impedance of the 3rd sample, the characteristic impedance of the 1st sample is high, and relative to the characteristic impedance of the 1st sample, the characteristic impedance of the 2nd sample is high.According to this result, show the increase along with overlapping portion α, characteristic impedance increases.That is, that confirms by winding 20 and winding 21 is overlapping, can obtain high characteristic impedance.
But, in common mode choke 1, do not need to arrange interval between winding 20 and winding 21 to obtain high characteristic impedance.Therefore, in common mode choke 1, and compared with the common mode choke in the past obtaining high characteristic impedance by arranging interval between 2 windings, many numbers of turn can be obtained.Consequently, common mode choke 1, compared with common mode choke in the past, can obtain large common code impedance.
In addition, in common mode choke in the past, between 2 windings, be provided with interval, so 2 windings can moving axially along core portion.Thus, be difficult to make the interval of 2 windings keep constant, thus in common mode choke in the past, be difficult to obtain stable characteristic impedance.On the other hand, in common mode choke 1, there is not the interval of 2 windings, according to whether 2 winding overlaps being obtained high characteristic impedance, so more can obtain stable characteristic impedance than common mode choke in the past.
(the 1st variation, with reference to Fig. 7 and Fig. 8)
As shown in Figure 7, the common mode choke 1A of the 1st variation and the difference of common mode choke 1 are the number of wire turns of winding.
Specifically, in common mode choke 1A, compared with common mode choke 1, the number of wire turns of winding 20,21 is few, arranges spaced part so exist between close winding.Thus, in common mode choke 1A, the interval of close winding can be controlled, consequently, characteristic impedance can be made higher.Other structures in common mode choke 1A are identical with common mode choke 1.Therefore, the explanation beyond the number of wire turns of above-mentioned winding is as the explanation at electronic unit 1.
The present application person is in order to confirm that above-mentioned effect is tested.Specifically, experiment uses 4th sample suitable with common mode choke 1A, overlapping portion α to measure characteristic impedance than the 5th sample of many 2 of the 4th sample and from the 6th sample that overlapping portion α deleted by the 4th sample.Wherein, the size of each sample is 2.0mm × 1.2mm × 0.9mm.
As shown in Figure 8, show in the scope of 30MHz ~ 1GHz, the characteristic impedance of the 6th sample is about 80 Ω to the structure of experiment, and the characteristic impedance of sample 4 is about 100 ~ 115 Ω, and the characteristic impedance of sample 5 is about 160 ~ 175 Ω.Therefore, according to this result, confirm in common mode choke 1A, the characteristic impedance higher than common mode choke 1 can be obtained.
(the 2nd variation, with reference to Fig. 9)
As shown in Figure 9, the common mode choke 1B of the 2nd variation and the difference of common mode choke 1 are, the position relationship of the winding 20,21 of the front and back of overlapping portion α.
Specifically, in common mode choke 1B, at overlapping portion α, winding 20 not exclusively intersects with winding 21.Therefore, in common mode choke 1B, do not have the position relationship in the x-axis direction of winding 20 and winding 21 as common mode choke 1 to exchange completely.Other structures in common mode choke 1B are identical with common mode choke 1.Therefore, the explanation except number of wire turns of above-mentioned winding is as the explanation at electronic unit 1.
(other embodiments)
Common mode choke involved in the present invention is not limited to above-described embodiment, can carry out all changes in the scope of its main idea.Such as, the core portion in the interval of the number of wire turns of winding, winding, magnetic core, the shape, material etc. of flange part are arbitrary.In addition, also the part be closely wound by winding can be set in a part, interval be set in other parts and reel etc., respectively above-described embodiment is combined.
In sum, the present invention is useful to common mode choke, can obtain in high characteristic impedance excellent.
Claims (3)
1. a common mode choke, is characterized in that,
Possess:
Magnetic core, it has the core portion extended vertically;
1st winding, it is wound in described core portion; And
2nd winding, it is wound in described core portion in the mode parallel with described 1st winding,
When observing from the direction orthogonal with described axis, a part for described 2nd winding is overlapping with described 1st winding,
The remainder of described 2nd winding arranges with axial substantially in parallel relative to described 1st winding.
2. common mode choke according to claim 1, is characterized in that,
When observing from the direction orthogonal with described axis, described 2nd winding is overlapping at 2 places with described 1st winding.
3., according to the common mode choke shown in claim 1, it is characterized in that,
When observing from the direction orthogonal with described axis, described 2nd winding is overlapping at 4 places with described 1st winding.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-204262 | 2013-09-30 | ||
| JP2013204262A JP2015070153A (en) | 2013-09-30 | 2013-09-30 | Common mode choke coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104517700A true CN104517700A (en) | 2015-04-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410493488.6A Pending CN104517700A (en) | 2013-09-30 | 2014-09-24 | Common mode choke |
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| Country | Link |
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| JP (1) | JP2015070153A (en) |
| CN (1) | CN104517700A (en) |
| TW (1) | TW201526041A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107424766A (en) * | 2017-05-12 | 2017-12-01 | 广东美信科技股份有限公司 | A kind of integrated form network filtering device |
| CN110021475A (en) * | 2017-12-26 | 2019-07-16 | 株式会社村田制作所 | Winding core and its manufacturing method, winding core aggregate |
| CN110660568A (en) * | 2018-06-29 | 2020-01-07 | 株式会社村田制作所 | Coil component |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6819314B2 (en) * | 2017-01-23 | 2021-01-27 | Tdk株式会社 | Common mode filter and its manufacturing method |
| JP6965862B2 (en) * | 2018-09-28 | 2021-11-10 | 株式会社村田製作所 | Coil parts |
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| JP2004146671A (en) * | 2002-10-25 | 2004-05-20 | Tdk Corp | Surface-mount common mode noise filter |
| JP2008034777A (en) * | 2006-07-31 | 2008-02-14 | Taiyo Yuden Co Ltd | Common mode choke coil |
| CN101529537A (en) * | 2006-12-01 | 2009-09-09 | 株式会社村田制作所 | Common mode choke coil |
| JP2011253888A (en) * | 2010-06-01 | 2011-12-15 | Tdk Corp | Coil component and coil component manufacturing method |
-
2013
- 2013-09-30 JP JP2013204262A patent/JP2015070153A/en active Pending
-
2014
- 2014-09-23 TW TW103132778A patent/TW201526041A/en unknown
- 2014-09-24 CN CN201410493488.6A patent/CN104517700A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004146671A (en) * | 2002-10-25 | 2004-05-20 | Tdk Corp | Surface-mount common mode noise filter |
| JP2008034777A (en) * | 2006-07-31 | 2008-02-14 | Taiyo Yuden Co Ltd | Common mode choke coil |
| CN101529537A (en) * | 2006-12-01 | 2009-09-09 | 株式会社村田制作所 | Common mode choke coil |
| JP2011253888A (en) * | 2010-06-01 | 2011-12-15 | Tdk Corp | Coil component and coil component manufacturing method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107424766A (en) * | 2017-05-12 | 2017-12-01 | 广东美信科技股份有限公司 | A kind of integrated form network filtering device |
| CN110021475A (en) * | 2017-12-26 | 2019-07-16 | 株式会社村田制作所 | Winding core and its manufacturing method, winding core aggregate |
| US11050329B2 (en) | 2017-12-26 | 2021-06-29 | Murata Manufacturing Co., Ltd. | Method for manufacturing a winding core |
| CN110021475B (en) * | 2017-12-26 | 2022-01-14 | 株式会社村田制作所 | Method for manufacturing core for winding |
| CN110660568A (en) * | 2018-06-29 | 2020-01-07 | 株式会社村田制作所 | Coil component |
| CN110660568B (en) * | 2018-06-29 | 2022-08-23 | 株式会社村田制作所 | Coil component |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201526041A (en) | 2015-07-01 |
| JP2015070153A (en) | 2015-04-13 |
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Application publication date: 20150415 |