CN100541682C - Line filter - Google Patents
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- Publication number
- CN100541682C CN100541682C CNB2004100074904A CN200410007490A CN100541682C CN 100541682 C CN100541682 C CN 100541682C CN B2004100074904 A CNB2004100074904 A CN B2004100074904A CN 200410007490 A CN200410007490 A CN 200410007490A CN 100541682 C CN100541682 C CN 100541682C
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- 239000011258 core-shell material Substances 0.000 claims abstract description 10
- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- 229910000859 α-Fe Inorganic materials 0.000 claims description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 150000002148 esters Chemical class 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000004804 winding Methods 0.000 abstract description 15
- 230000004907 flux Effects 0.000 abstract description 14
- 238000000926 separation method Methods 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 230000000644 propagated effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
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Abstract
The invention provides a kind of line filter:, have both to have that leakage flux is compressed on characteristic minimal, that magnetic efficiency is good and stable, that suppress normal mode noise though be the structure of common-mode choking-winding.In this line filter, closed magnetic circuit magnetic core (10) forms hollow, on its magnetic foot section (11) on one side, the coil rack (30,31) of winding around (20,21) respectively is installed, and, relative with above-mentioned magnetic foot section (11) to another magnetic foot section (12) on, the configuration coil (20,21) outer peripheral face.In addition, between coil rack (30,31), insert U font center magnetic core (40), come separation line ring framework (30) and (31), and コ font magnetic core shell (50) is installed, coats magnetic foot section (11) another magnetic foot section (12) and side magnetic foot section 3 limits such as (13,14) in addition of closed magnetic circuit magnetic core (10).
Description
Technical field
The present invention relates to eliminate the common-mode noise that on the electric circuit of various electronic equipments, produces and the line filter of normal mode noise.
Background technology
In the prior art, though known to have be the structure of common-mode choking-winding basically, also suppress the choking-winding of normal mode noise.
The choking-winding of this structure, known have a kind of like this bobbin for coil of compound choking-winding that suppresses common-mode noise and normal mode noise, this compound choking-winding, use 2 coils that mutual anti-phase winding periphery separates with insulating material, 2 U font magnetic cores relatively be assembled in this coil rack inside and outside, form simple closed magnetic circuit, between 2 coils on one side of above-mentioned simple closed magnetic circuit magnetic core, promptly between above-mentioned 2 U font magnetic cores, with H shape connect tabular bypass magnetic core form the short circuit magnetic circuit (as, with reference to patent documentation 1).
In addition, known have a kind of so compound choking-winding that suppresses common-mode noise and normal mode noise, this compound choking-winding, with the through hole of mutual anti-phase winding periphery with 1 bobbin for coil of 2 coils that insulating material separated, insert and be combined on the magnetic foot section of closed magnetic circuit magnetic core, form magnetic circuit; Between 2 coils of above-mentioned skeleton, insert U font center magnetic core, the bottom of this center magnetic core is opposed with a magnetic foot section of a fixed gap and above-mentioned closed magnetic circuit magnetic core, in addition, the front edge portion of the peristome of this center magnetic core is opposed with another magnetic foot section of a fixed gap and above-mentioned closed magnetic circuit magnetic core, form magnetic circuit (as, with reference to patent documentation 2).
[patent documentation 1]: the spy opens flat 9-139317 communique; [patent documentation 2]: the spy opens the 2001-110654 communique.
But all there is following problems in any in above-mentioned conventional art.
Promptly, because it is split type forming the magnetic core of closed magnetic circuit, so, produce the space on the composition surface, because the no regularity at random in this space, leakage flux is at random random, the result, the characteristic scattered error of choking-winding itself becomes big (patent documentation 1), in addition, the front edge portion of center magnetic core peristome is configured to certain space opposed with another magnetic foot section on the one side that constitutes above-mentioned closed magnetic circuit magnetic core, so, the magnetic efficiency that is caused by the increase of the increase of leakage flux and magnetic resistance descends, and is the main cause (patent documentation 2) that the choking-winding self character worsens.
Summary of the invention
Therefore, the present invention addresses the above problem, and is the structure of common-mode choking-winding though provide a kind of, have both have stable, suppress the characteristic of normal mode noise and the line filter that price is cheap, productivity ratio is high.
In order to solve above-mentioned problem, can realize by constituting such line filter.As the line filter of the present invention's first scheme, suppress common-mode noise and normal mode noise, it has: hollow closed magnetic circuit magnetic core; Be embedded in as 2 coil racks in the magnetic foot section on one side of above-mentioned closed magnetic circuit magnetic core,, the coil of on above-mentioned coil rack, reeling respectively, will be relative with above-mentioned magnetic foot section to another magnetic foot section be configured on the outer peripheral face of above-mentioned coil; U font center magnetic core is inserted between the above-mentioned coil rack in the mode that separates between the above-mentioned coil rack; And a pair of protuberance, the peristome that is separately positioned on above-mentioned center magnetic core is neighbouring inboard, and faces mutually.
The side that is embedded with the above-mentioned magnetic foot section of above-mentioned coil rack is configured to face mutually with the recess bottom surface of above-mentioned center magnetic core, and, raised part be configured to mutually in the face of and another magnetic foot section of above-mentioned closed magnetic circuit magnetic core is clipped in the middle.
In addition, alternative plan of the present invention, in above-mentioned line filter, the depth of the raised part of above-mentioned center magnetic core is sized for above-mentioned another magnetic foot section section thickness size that is not less than the above-mentioned closed magnetic circuit magnetic core of facing mutually with this protuberance, thus, can further solve magnetic efficiency and leakage flux problem.
In addition, third party's case of the present invention in above-mentioned line filter, on above-mentioned coil rack and blade of a sword face that above-mentioned closed magnetic circuit magnetic core is faced mutually, is provided with the installing and locating fixed part of above-mentioned closed magnetic circuit magnetic core; On above-mentioned coil rack and blade of a sword face that above-mentioned center magnetic core is faced mutually, the positioning and fixing portion of above-mentioned center magnetic core is set.The cubic case of the present invention has the magnetic core shell, above-mentioned center magnetic core is inserted into always between the above-mentioned coil rack the insertion precalculated position and fixing after, above-mentioned coil rack and above-mentioned closed magnetic circuit magnetic core and center magnetic core one are fixed.Thus, just can solve the magnetic space and stabilize and increase problems such as productivity ratio.
In addition, the present invention's the 5th scheme be ferrite or the ferrite powder above-mentioned center magnetic core of ferrite resin-coating with high-insulativity with ester moulding with nickel, or insulating resin coats above-mentioned center magnetic core in above-mentioned line filter.Thus, can solve the problem of the insulation reduction that causes by corona discharge.
Moreover, in the 6th scheme of the present invention, the above-mentioned magnetic core shell sidepiece of configuration between the peristome of another leg of above-mentioned closed magnetic circuit magnetic core and above-mentioned center magnetic core.According to this structure, can suitably keep the gap between another leg and the center magnetic core peristome.
Moreover, between the peristome of above-mentioned center magnetic core, dispose the sidepiece of above-mentioned magnetic core shell.
Description of drawings
Fig. 1 is the line filter oblique view of expression embodiment of the present invention example.
Fig. 2 is the side sectional view of line filter shown in Figure 1.
Fig. 3 is the exploded perspective view of line filter shown in Figure 1.
Fig. 4 is the exploded perspective view that illustrates in greater detail the line filter of Fig. 1.
Fig. 5 is the oblique view of expression embodiment of the present invention variation.
The magnetic circuit figure that flows of Fig. 6 magnetic flux that to be expression caused by the normal mode noise of the line filter that the present invention relates to.
Fig. 7 is the circuit diagram that the normal mode noise of expression when using the line filter that the present invention relates to propagated.
The magnetic circuit figure that flows of Fig. 8 magnetic flux that to be expression caused by the common-mode noise of the line filter that the present invention relates to.
Fig. 9 is the circuit diagram that the common-mode noise of expression when using the line filter that the present invention relates to propagated.
Figure 10 is the superimposed current-inductance characteristic figure of the line filter that the present invention relates to.
Embodiment
Below, according to accompanying drawing embodiments of the present invention are described.
Fig. 1 is the line filter oblique view in the embodiment of the present invention.Fig. 2 is the side sectional view of Fig. 1.Fig. 3 is the exploded perspective view of Fig. 1.Fig. 4 is the exploded perspective view of presentation graphs 3 in more detail.Fig. 5 is the line filter oblique view of expression variation of the present invention.The magnetic circuit figure that flows of Fig. 6 magnetic flux that to be the line filter that the present invention relates to of expression caused by normal mode noise.Fig. 7 is the circuit diagram that the normal mode noise of expression when using the line filter that the present invention relates to propagated.The magnetic circuit figure that flows of Fig. 8 magnetic flux that to be the line filter that the present invention relates to of expression caused by common-mode noise.The circuit diagram of propagation of the common-mode noise when Fig. 9 is to use the line filter that expression the present invention relates to.Figure 10 is the line filter that the present invention relates to and the line filter superimposed current-inductance characteristic figure under normal conditions of traditional specification.
Among Fig. 1～Fig. 3, in the line filter of embodiment of the present invention, closed magnetic circuit magnetic core 10 forms hollow, on its magnetic foot section 11 on one side, the coil rack 30,31 that is wound with coil 20,21 respectively is installed, in addition, with above-mentioned magnetic foot section 11 opposed another magnetic foot section 12, be configured in coil 20,21 outer peripheral face sides.In addition, between coil rack 30,31, insert U font center magnetic core 40 and come separation line ring framework 30,31, and, the magnetic core shell 50 of コ font is installed, with 3 limits such as another magnetic foot section 12 beyond the magnetic foot section 11 that coats closed magnetic circuit magnetic core 10 and side magnetic foot section 13,14.
This structure is specially: near the inboard of the opening portion 41 of center magnetic core 40 protuberance 42,43 is set, the depth size A of this protuberance 42,43 is symmetrical shape basically greater than the section thickness size B of another magnetic foot section 12.Like this, by protuberance 42,43 is set on center magnetic core 40, set for the peristome size C of center magnetic core 40 littler than its bottom width dimension D.Thus, face mutually for 3 of side 45,46 near the bottom surface 44 of magnetic foot section 11 and center magnetic core 40 and the bottom, each space E1, E2 of near this magnetic foot section 11 and the bottom side 45,46 about equally, and, set for than and magnetic foot section 11 and bottom surface 44 between space F big.Moreover, by such configuration closed magnetic circuit magnetic core 10 and center magnetic core 40, seek certainization in the place that magnetic flux passes through, can form the little and stable magnetic circuit of loss thus.
At this, as shown in Figure 4, on coil rack 30,31 and each blade of a sword face that side foot section 13,14 is faced mutually, be provided with respectively can be seamlessly chimeric with side foot section 13,14 cross ditch shape fixed part a.Moreover, on coil rack 30,31 and blade of a sword face that center magnetic core 40 is faced mutually, be provided with fixed part b, c, the d seamlessly chimeric with the periphery of center magnetic core 40, this fixed part b, c, d are configured in respectively on the line consistent with the central datum line X of cross ditch shape fixed part a and Y.In addition, e is the fixed part that is used for the center magnetic core 40 used in the distortion of this execution mode, for example, as shown in Figure 5, at terminal 160 are the occasions of vertically drawing on the plane that forms of magnetic foot section 11 and another magnetic foot section 12 at closed magnetic circuit magnetic core 10, if center magnetic core 40 is fixed with c, b, e equally with said method, then can be changed the line filter of drawing direction of input, lead-out terminal easily.In addition, in the explanation of each above-mentioned execution mode, the positioning and fixing portion that is arranged on the center magnetic core in the blade of a sword portion of coil rack is the contour part as center magnetic core, and still, also it can be arranged on the center magnetic core inboard is recess.In addition, the line f among Fig. 4 represents to be used for coil rack 30,31 is installed to cutting part on the magnetic foot section 11 of closed magnetic circuit magnetic core 10.
An example as this execution mode, this center magnetic core 40 is being inserted between coil rack 30 and 31, and be inserted under the state in precalculated position always, the magnetic foot section 11 of closed magnetic circuit magnetic core 10 becomes 0.1～0.3mm with space F configuration settings between the bottom surface 44 of center magnetic core 40, in addition, space E1, the E2 of near the side 45,46 the magnetic foot section 11 of closed magnetic circuit magnetic core 10 and the bottom respectively configuration settings become 0.15～0.35mm..Moreover near peristome 41 inboard protuberance 42,43 configuration settings become to clamp another magnetic foot section 12 with the space of 0.05～0.25mm.
According to such structure, near the section portion 51 of the magnetic core shell 50 that the peristome 41 of another magnetic foot section 12 and center magnetic core 40 intersects, shown in the profile of Fig. 2, the side recess embeds another magnetic foot section 12 within it, and its two lateral surface is embedded into the order difference part of opening 41 sides of protuberance 42,43.Moreover the both sides hook portion 52,53 of the magnetic core shell 50 that combines with closed magnetic circuit magnetic core 10 and center magnetic core 40 like this is fixed to the state at the blade of a sword edge that hangs over coil rack 30,31.In addition, strong and rubber-like synthetic resin forms magnetic core shell 50 by toughness, so, can make firm fixing for the fixing of above-mentioned coil rack 30,31.Thus, can form the mutual alignment relation and the space magnetic circuit that be fixed, that meet setting of closed magnetic circuit magnetic core 10 and center magnetic core 40.
In addition, in the blade of a sword portion of the outside of coil rack 30,31, be pressed into terminal 60,61 respectively and be installed on the magnetic foot section 11 of closed magnetic circuit magnetic core 10, be wound with coil 20,21.Then, the coil 20,21 of Chan Raoing for example mutually oppositely twines and links with terminal 60,61 thereon, make on the magnetic foot section 11 of closed magnetic circuit magnetic core 10, become anti-phase.In addition, owing to coil rack 30 separates with 31, so have the effect of improving formability and installation exercise.
By constituting said structure, the inhibition of normal mode noise is performed such, in Fig. 6, Fig. 7, make by a side the coil 20 and magnetic flux E, the F of coil 21 generations, pass through in the same way mutually in center magnetic core 40 upper edges, and, mutual reverse passing through on closed magnetic circuit magnetic core 10, and magnetic flux E, F are non-in closed magnetic circuit magnetic core 10 cancels out each other, and suppress normal mode noise G thus.
In addition, the inhibition of common-mode noise is performed such, and in Fig. 8, Fig. 9, makes the magnetic flux E, the F that are produced by a side coil 20 and coil 21, in closed magnetic circuit magnetic core 10 mutually in the same way by and non-cancelling out each other, suppress common-mode noise H thus.
Figure 10 relatively illustrates the normality characteristic (superimposed current-inductance) of the line filter that the present invention relates to and conventional art (above-mentioned back one type) line filter.In each line filter that uses in this is measured, the size of each parts is identical with material and coil specification, and, under assembled state, the peristome side of center magnetic core changed and the closed magnetic circuit magnetic core between opposite distance and space.Specifically, another magnetic foot section of closed magnetic circuit magnetic core of the present invention is with the space configuration with 0.15mm of the protuberance of the peristome of center magnetic core and both sides.On the other hand, another magnetic foot section of the closed magnetic circuit magnetic core of conventional art product, the peristome end face of decentre magnetic core keeps the space configuration of 0.1mm, leaves the space configuration that oral area medial surface both sides keep 0.3mm.In addition, the common-mode characteristic of the line filter that in comparative measurements, uses, product of the present invention is 5.2mH, the product of conventional art is 5.1mH (applied voltage: 10KHz, 0.1V), has identical characteristic basically.As can be seen from Figure 9, the line filter that the present invention relates to, can obtain up to rated current 1.45% near, far above the stable inductance of conventional art product.
In addition, in order to solve problem by the insulation that corona discharge the caused reduction of coil and center magnetic core, can adopt such method, promptly to use nickel be ferrite or ferrite powder coats center magnetic core 40 with the ferrite resin or the insulating resin of the high-insulativity of resin forming.
The invention effect
As above illustrated, according to first scheme of the present invention, can provide such line filter Device, it suppresses common-mode noise and normal mode noise, has: hollow closed magnetic circuit magnetic core; Be embedded into 2 coil racks in the magnetic foot section on one side of above-mentioned closed magnetic circuit magnetic core are at above-mentioned coil The coil of reeling respectively on the skeleton, will be relative with above-mentioned magnetic foot section to another magnetic foot section configuration On the outer peripheral face of above-mentioned coil; U font center magnetic core is to separate between the above-mentioned coil rack Mode is inserted between the above-mentioned coil rack; And, near the peristome of above-mentioned center magnetic core The a pair of protuberance that side is faced mutually is configured to the side of above-mentioned magnetic foot section with above-mentioned center magnetic core The recess bottom surface is faced mutually, and near the protuberance the above-mentioned peristome of above-mentioned center magnetic core is configured to Mutually in the face of and another magnetic foot section of above-mentioned closed magnetic circuit magnetic core is clipped in the middle. Thus, although The structure of common-mode choking-winding, but can provide have both have with leakage magnetic flux be suppressed at minimal, The line filter magnetic efficiency good stable, that suppress the characteristic of normal mode noise.
In addition, if according to the present invention alternative plan, with the depth of the raised part of above-mentioned center magnetic core Being sized for above-mentioned another magnetic that is not less than the above-mentioned closed magnetic circuit magnetic core of facing mutually with this protuberance props up Foot's section thickness size. Thus, can further seek the carrying of magnetic efficiency of above-mentioned line filter The reduction of height and leakage magnetic flux.
Moreover, if according to the present invention third party's case, at above-mentioned coil rack and above-mentioned closed magnetic circuit On the blade of a sword face that magnetic core is faced mutually, the installation location fixed part of above-mentioned closed magnetic circuit magnetic core is set; Upper On the blade of a sword face of facing mutually with above-mentioned center magnetic core of stating coil rack, deciding of above-mentioned center magnetic core is set The position fixed part. Perhaps, if according to the present invention cubic case, have magnetic core outer shell, with in above-mentioned Heart magnetic core be inserted into always between the above-mentioned coil rack the insertion precalculated position and fixing after, with upper Stating coil rack and above-mentioned closed magnetic circuit magnetic core and center magnetic core one fixes. Thus, raising is given birth to Productive rate also can provide price cheap above-mentioned line filter.
In addition, according to the 5th scheme of the present invention, can provide such line filter: using will Nickel is ferrite or ferrite powder with ferrite resin or the insulation with high-insulativity of ester moulding Resin coats above-mentioned center magnetic core. Thus, just can provide and can not cause by corona discharge and made The above-mentioned line filter that the insulation that becomes reduces.
Moreover, such as the 6th scheme of the present invention, if at another leg of above-mentioned closed magnetic circuit magnetic core Between the peristome of section and above-mentioned center magnetic core, dispose the sidepiece of above-mentioned magnetic core outer shell, then suitably Keep the gap between another foot section and the center magnetic core peristome, thus, can provide and have both Line filter stable, that suppress the characteristic of normal mode noise is arranged.
Claims (7)
1, a kind of line filter suppresses common-mode noise and normal mode noise, it is characterized in that having: hollow closed magnetic circuit magnetic core; Be embedded in as 2 coil racks in the magnetic foot section on one side of above-mentioned closed magnetic circuit magnetic core, the coil of on above-mentioned coil rack, reeling respectively, will be relative with above-mentioned magnetic foot section to another magnetic foot section be configured on the outer peripheral face of above-mentioned coil; U font center magnetic core is inserted between the above-mentioned coil rack in the mode that separates between the above-mentioned coil rack; And a pair of protuberance, the peristome that is separately positioned on above-mentioned center magnetic core is neighbouring inboard, and faces mutually,
The side that is embedded with the above-mentioned magnetic foot section of above-mentioned coil rack is configured to face mutually with the recess bottom surface of above-mentioned center magnetic core, and, raised part be configured to mutually in the face of and another magnetic foot section of above-mentioned closed magnetic circuit magnetic core is clipped in the middle.
2, line filter according to claim 1 is characterized in that, the depth of the raised part of above-mentioned center magnetic core is sized for above-mentioned another magnetic foot section section thickness size that is not less than the above-mentioned closed magnetic circuit magnetic core of facing mutually with this protuberance.
3, line filter according to claim 1 and 2 is characterized in that, on above-mentioned coil rack and blade of a sword face that above-mentioned closed magnetic circuit magnetic core is faced mutually, above-mentioned closed magnetic circuit magnetic core installing and locating fixed part is set; On above-mentioned coil rack and blade of a sword face that above-mentioned center magnetic core is faced mutually, the positioning and fixing portion of above-mentioned center magnetic core is set.
4, according to each described line filter in claim 1 or 2, it is characterized in that, has the magnetic core shell, above-mentioned center magnetic core is inserted into always between the above-mentioned coil rack the insertion precalculated position and fixing after, above-mentioned coil rack and above-mentioned closed magnetic circuit magnetic core and center magnetic core one are fixed.
According to each described line filter in claim 1 or 2, it is characterized in that 5, using nickel is ferrite or the ferrite powder above-mentioned center magnetic core of ferrite resin-coating with high-insulativity with ester moulding.
6, according to each described line filter in claim 1 or 2, it is characterized in that, coat above-mentioned center magnetic core with insulating resin.
7, line filter according to claim 4 is characterized in that, between the peristome of above-mentioned center magnetic core, disposes the sidepiece of above-mentioned magnetic core shell.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003058282A JP3886048B2 (en) | 2003-03-05 | 2003-03-05 | Line filter |
| JP200358282 | 2003-03-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1527330A CN1527330A (en) | 2004-09-08 |
| CN100541682C true CN100541682C (en) | 2009-09-16 |
Family
ID=33121426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100074904A Expired - Lifetime CN100541682C (en) | 2003-03-05 | 2004-03-05 | Line filter |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3886048B2 (en) |
| CN (1) | CN100541682C (en) |
| TW (1) | TWI288939B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044324A (en) * | 2009-10-19 | 2011-05-04 | 东京零件工业股份有限公司 | Line filter |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5054667B2 (en) * | 2008-12-27 | 2012-10-24 | 東京パーツ工業株式会社 | Line filter |
| CN101510920B (en) * | 2009-03-13 | 2011-02-16 | 北京佳讯飞鸿电气股份有限公司 | Filling-in type line filter |
| KR101428199B1 (en) | 2012-10-22 | 2014-08-07 | 엘지이노텍 주식회사 | The common mode filter and the power supply device having the same |
| CN103383889B (en) * | 2013-06-27 | 2016-02-03 | 广安市华蓥山领创电子有限公司 | A kind of framework of ultrathin transformer |
| WO2015005129A1 (en) * | 2013-07-08 | 2015-01-15 | 株式会社村田製作所 | Coil component |
| KR101507455B1 (en) | 2013-11-14 | 2015-03-31 | (주)한국센서 | Line Filter With Current Sensor |
| JP6885100B2 (en) * | 2017-02-23 | 2021-06-09 | スミダコーポレーション株式会社 | Filter parts assembly kit, filter parts, and manufacturing method of filter parts |
| JP7200586B2 (en) * | 2018-10-09 | 2023-01-10 | スミダコーポレーション株式会社 | Magnetic field generator for biostimulation |
-
2003
- 2003-03-05 JP JP2003058282A patent/JP3886048B2/en not_active Expired - Lifetime
-
2004
- 2004-02-24 TW TW93104606A patent/TWI288939B/en not_active IP Right Cessation
- 2004-03-05 CN CNB2004100074904A patent/CN100541682C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044324A (en) * | 2009-10-19 | 2011-05-04 | 东京零件工业股份有限公司 | Line filter |
| CN102044324B (en) * | 2009-10-19 | 2014-08-06 | 东京零件工业股份有限公司 | Line filter |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200503004A (en) | 2005-01-16 |
| JP2004273510A (en) | 2004-09-30 |
| CN1527330A (en) | 2004-09-08 |
| JP3886048B2 (en) | 2007-02-28 |
| TWI288939B (en) | 2007-10-21 |
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