CN101377972A - Filter element and manufacturing method thereof - Google Patents
Filter element and manufacturing method thereof Download PDFInfo
- Publication number
- CN101377972A CN101377972A CNA200710148123XA CN200710148123A CN101377972A CN 101377972 A CN101377972 A CN 101377972A CN A200710148123X A CNA200710148123X A CN A200710148123XA CN 200710148123 A CN200710148123 A CN 200710148123A CN 101377972 A CN101377972 A CN 101377972A
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- magnetic
- conductive part
- guiding loop
- magnetic conductive
- filter element
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Abstract
The invention discloses a filter element, comprising a first magnetic conductive ring, a second magnetic conductive ring, two winding wires and a magnetic conductive part. The second magnetic conductive ring is coated on the first magnetic conductive ring. The winding wires are respectively wound on the second magnetic conductive ring, after that, the magnetic conductive part is assembled and connected with the second magnetic conductive ring.
Description
Technical field
The present invention relates to a kind of filter element and manufacture method thereof, especially relate to a kind of volume little and coiling better simply filter element of winding and manufacture method thereof.
Background technology
The application of Power Electronic Circuit in recent years sees extensively more, and this type of circuit normally operates in high frequency and switches, therefore be easy to generate electromagnetic interference (Electro Magnetic Interference, EMI).These high frequency noises can conduct by electromagnetic radiation or power line, and disturb the operate as normal of other electric equipments.Wherein the conduction type electromagnetic interference can be divided into differential mode (DifferentialMode, DM) noise and common mode (Common Mode, CM) noise according to the difference in noise current delivery path.On general real the work, for example can utilize usually and eliminate the conduction type electromagnetic interference for the filter element of choking-winding (choke coil).
Please refer to shown in Figure 1ly, existing choking-winding 1 comprises an insulator 11, a common mode iron core 12, a differential mode iron core 13, one first coiling, 14 and 1 second coiling 15.
This insulator 11 is used for separating this common mode iron core 12 and this differential mode iron core 13.This differential mode iron core 13 has a cylindrical portion 13a and an annulus 13b, and it is one of the forming.And this first coiling 14 and this second coiling 15 serve as to separate and be wound in the both sides of choking-winding 1 respectively with this cylindrical portion 13a.Therefore, after the conduction type electromagnetic interference enters this choking-winding 1, can eliminate the common mode noise by this common mode iron core 12, and eliminate the differential mode noise by this differential mode iron core 13.
Yet, in the prior art, when this choking-winding 1 size is dwindled gradually, it winds the line can be because the obstruction of cylindrical portion 13a when twining operation, and make working space dwindle, so also can increase the degree of difficulty that operation is twined in coiling, and have the risk that scratch is suffered in coiling.
Therefore, how to design a kind of choking-winding that can make overall volume dwindle and can not cause coiling winding degree of difficulty to increase, become one of important topic.
Summary of the invention
Because above-mentioned problem the object of the present invention is to provide a kind of filter element and manufacture method thereof that can make overall volume dwindle and can not cause coiling winding degree of difficulty to increase.
Edge is for reaching above-mentioned purpose, to comprise one first magnetic guiding loop, one second magnetic guiding loop, two coiling and magnetic conductive parts according to a kind of filter element of the present invention.This second magnetic guiding loop coats this first magnetic guiding loop.These the coiling be wound in this second magnetic guiding loop respectively after, this magnetic conductive part again with this second magnetic guiding loop winding.
In addition, for reaching above-mentioned purpose, the manufacture method of foundation a kind of filter element of the present invention comprises following steps: at first, one second magnetic guiding loop is coated one first magnetic guiding loop.Then, two coilings are wound in this second magnetic guiding loop respectively.At last, with a magnetic conductive part and this second magnetic guiding loop winding.
From the above, filter element of the present invention is by coating in order to eliminate this first magnetic guiding loop of common mode noise in order to this second magnetic guiding loop of eliminating the differential mode noise, and, when carrying out the winding operation of these coilings, can earlier this magnetic conductive part be taken off to increase working space by removable magnetic conductive part.And after these coiling windings are finished, again this magnetic conductive part is combined with this second magnetic guiding loop to finish the making of filter element, can avoid thus dwindling the problem that difficulty is twined in these coilings that produces because of this filter element size.
Description of drawings
Fig. 1 is the schematic diagram of existing choking-winding;
Fig. 2 A and Fig. 2 B are the schematic diagram of the filter element of first embodiment of the invention;
Fig. 3 is the schematic diagram of another aspect of filter element of first embodiment of the invention;
Fig. 4 A and Fig. 4 B are the schematic diagram of filter element working method of the present invention;
Fig. 5 is the schematic diagram of the filter element of second embodiment of the invention;
Fig. 6 is the schematic diagram of the filter element of third embodiment of the invention;
Fig. 7 A and Fig. 7 B are the schematic diagram of another aspect of magnetic conductive part of the filter element of third embodiment of the invention; And
Fig. 8 is the flow chart of the manufacture method step of filter element of the present invention.
The main element symbol description
1: choking-winding 11: insulator
12: common mode iron core 13: the differential mode iron core
13a: cylindrical portion 13b: annulus
Coiling in 14: the first coiling in 15: the second
2: filter element 21,31: the first magnetic guiding loops
22,32: the second magnetic guiding loops 221,221a: second junction surface
23,24: coiling 25,35: magnetic conductive part
251,251a: first junction surface 26: insulating barrier
352,352a: the first sub-magnetic conductive part 353,353a: the second sub-magnetic conductive part
C1, C2: recess S 1, S2, S3, S4: composition surface
P1, P2: protruding part D1, D2, D3: direction
I
1, I
2, I
3: electric current
S01～S03: the manufacture method steps flow chart of filter element
Embodiment
Hereinafter with reference to relevant drawings, illustrate according to a kind of filter element of the present invention and manufacture method thereof.
Please be simultaneously with reference to shown in Fig. 2 A and Fig. 2 B, the filter element 2 of first embodiment of the invention comprises one first magnetic guiding loop 21, one second magnetic guiding loop 22, two coilings, 23,24 and one magnetic conductive part 25.
The material of this first magnetic guiding loop 21 is selected from the group that magnetic ferrites (ferrite), non-crystalline material (amorphous) and combination thereof are constituted, and this first magnetic guiding loop 21 is a common mode iron core, and it is as the function of eliminating the common mode noise.
The material of this second magnetic guiding loop 22 is selected from the group that high molecular polymer (polymer), magnetic filler (magnetic filler) and combination thereof are constituted, and wherein the magnetic filler then is selected from magnetic ferrites, contains ferromagnetic powder and group that combination constituted thereof.This second magnetic guiding loop 22 also coats this first magnetic guiding loop 21, and this second magnetic guiding loop 22 is a differential mode iron core, and it is as the function of eliminating the differential mode noise.
These 23,24 of coilings are wrapped in respectively on this second magnetic guiding loop 22, and wherein this coiling 23 is wound in the left side of this second magnetic guiding loop 22, and this coiling 24 then is wound in the right-hand part of this second magnetic guiding loop 22.
The material of this magnetic conductive part 25 can select for use with these second magnetic guiding loop, 22 identical materials or different material (for example this second magnetic guiding loop 22 for high molecular polymer with contain ferromagnetic powder and form, this magnetic conductive part 25 is that high molecular polymer and magnetic ferrites are formed), and it is also as the function of eliminating the differential mode noise.In addition, two ends of this magnetic conductive part 25 are done with the interior ring surface of this second magnetic guiding loop 22 respectively and are connected, and wherein this magnetic conductive part 25 has one first junction surface 251, and 22 of this second magnetic guiding loops have one second junction surface 221.Wherein this first junction surface 251 can comprise at least one protruding part P1, and 221 at this second junction surface can comprise at least one recess C1, and in the present embodiment, this first junction surface 251 is with two protruding part P1, and 221 at this second junction surface is that example explains with two recess C1.Thus, this magnetic conductive part 25 and this second magnetic guiding loop 22 can utilize this first junction surface 251 to be fixed mutually with this second junction surface 221.
Therefore, by this removable magnetic conductive part 25, when carrying out these coiling 23,24 windings, can earlier this magnetic conductive part 25 be taken off to increase working space.And after these coiling 23,24 windings are finished, again this magnetic conductive part 25 is combined with this second magnetic guiding loop 22 to finish the making of this filter element 2, can avoid thus dwindling the problem that difficulty is twined in these coilings 23,24 that produces because of these filter element 2 sizes.
In addition, please refer to shown in Figure 3, different with above-mentioned filter element 2 is, filter element 2A shown in Figure 3, its this first junction surface 251a also can utilize at least one recess C2, this second junction surface 221a then utilizes at least one protruding part P2 as combination, then has two recess C2 with this first junction surface 251a at this, and it is that example explains that this second junction surface 221a has two protruding part P2.Be noted that the design of this first junction surface 251a and this second junction surface 221a is not exceeded with present embodiment, consider can make this magnetic conductive part 25 combine to be fixed as preferentially with this second magnetic guiding loop 22.
Please refer to shown in Fig. 4 A, when electric current with I
1And I
2Direction flow through two the coiling 23,24 o'clock, can on this first magnetic guiding loop 21, produce the magnetic field of D1 direction, be converted to heat energy (heat energy) again via being circulated in closed magnetic path and consume, thus common mode noise electric current is consumed gradually to eliminate the common mode noise by eddy current.
Then, please refer to shown in Fig. 4 B, when electric current with I
1And I
3Direction flow through two the coiling 23,24 o'clock, then can on this second magnetic guiding loop 22 and this magnetic conductive part 25, produce the magnetic field of D2 and D3 direction, circulation is done via the left side of this second magnetic guiding loop 22 or right-hand part and this magnetic conductive part 25 respectively in two magnetic fields, be converted to heat energy to constitute closed magnetic path and consume, thus differential mode noise electric current is consumed gradually to eliminate the differential mode noise by eddy current.
Therefore, the filter element 2 of present embodiment can not only be eliminated common mode noise and differential mode noise simultaneously, and because circulation is all done in the magnetic field that electric current is produced in this filter element 2 on a closed magnetic path, so more can avoid this filter element 2 magnetic field that element produced arround being subjected to influence, or this filter element 2 produces leakage inductances and element arround influencing, and the stability of this filter element 2 also can obviously promote thus.
In addition, please refer to second embodiment of the invention shown in Figure 5, the difference of itself and the foregoing description is between this first magnetic guiding loop 21 and this second magnetic guiding loop 22 insulating barrier 26 to be set more, more can avoid 22 of this first magnetic guiding loop 21 and this second magnetic guiding loops to produce each other thus and disturb.
Please refer to shown in Figure 6ly, the filter element 3 of third embodiment of the invention and the difference of first embodiment are that this magnetic conductive part 35 more comprises one first sub-magnetic conductive part 352 and one second sub-magnetic conductive part 353, and both are corresponding to engage.Wherein this first sub-magnetic conductive part 352 and this second sub-magnetic conductive part 353 respectively have a composition surface S1, S2, and in the present embodiment, this two composition surface S1, S2 are that example explains with the inclined plane.Therefore, this first sub-magnetic conductive part 352 can correspond to each other and contact with this second sub-magnetic conductive part 353 by this two composition surface S1, S2, utilizes modes such as fixing, fastening or gummed to engage.In addition, the material and the relative configuration relation of this first magnetic guiding loop (not shown), this second magnetic guiding loop 32 and this magnetic conductive part 35 are identical with first embodiment, do not repeat them here.
In addition, please refer to Fig. 7 A and Fig. 7 B, this two composition surface S3, the S4 of this first sub-magnetic conductive part 352a and this second sub-magnetic conductive part 353a also can be respectively a plane (shown in Fig. 7 A) or be respectively a cascaded surface (shown in Fig. 7 B).The person of noting, the design of this two composition surface S3, S4 is not exceeded with present embodiment, and end is can make this first sub-magnetic conductive part 352a and this second sub-magnetic conductive part 353a combine closely to preferentially considering.
Again, the working method of the filter element 3 of present embodiment is identical with first embodiment, therefore, does not repeat them here.
Please refer to shown in Figure 8ly, the manufacture method of a kind of filter element of the present invention comprises step S01 to step S03.
Step S01 coats one first magnetic guiding loop with one second magnetic guiding loop.
Step S02 is wound in this second magnetic guiding loop respectively with two coilings.
Step S03 inserts this second magnetic guiding loop with a magnetic conductive part and is connected with the interior ring surface of this second magnetic guiding loop.
Because structure, material and the working method of filter element do not repeat them here to describe in detail in the aforementioned embodiment.
In sum, filter element of the present invention is by coating in order to eliminate this first magnetic guiding loop of common mode noise in order to this second magnetic guiding loop of eliminating the differential mode noise, and, when carrying out the winding operation of these coilings, can earlier this magnetic conductive part be taken off to increase working space by removable magnetic conductive part.And after these coiling windings are finished, again this magnetic conductive part is combined with this second magnetic guiding loop to finish the making of filter element, can avoid thus dwindling the problem that difficulty is twined in these coilings that produces because of this filter element size.
In addition, because circulation is all done in the magnetic field that the conduction type electromagnetic interference is produced in filter element of the present invention on a closed magnetic path, can avoid this filter element magnetic field that element produced arround being subjected to influence thus, or this filter element produces leakage inductance and element arround influencing, therefore, the stability of this filter element also can significantly promote.
The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should comprise in the appended claims its equivalent modifications of carrying out or change.
Claims (17)
1, a kind of filter element comprises:
First magnetic guiding loop;
Second magnetic guiding loop coats this first magnetic guiding loop;
Two coilings are wound in this second magnetic guiding loop respectively; And
Magnetic conductive part, itself and this first magnetic guiding loop and this second magnetic guiding loop are separation member, and can with this second magnetic guiding loop winding.
2, filter element as claimed in claim 1, wherein this second magnetic guiding loop and this magnetic conductive part are a differential mode iron core.
3, filter element as claimed in claim 1, wherein the material of this second magnetic guiding loop or this magnetic conductive part is selected from high molecular polymer, magnetic filler, magnetic ferrites, contains ferromagnetic powder and group that combination constituted thereof.
4, filter element as claimed in claim 1, wherein this second magnetic guiding loop and this magnetic conductive part are the same material composition or are that different materials is formed.
5, filter element as claimed in claim 1, wherein this first magnetic guiding loop is a common mode iron core.
6, filter element as claimed in claim 1, wherein the material of this first magnetic guiding loop is selected from magnetic ferrites, non-crystalline material and group that combination constituted thereof.
7, filter element as claimed in claim 1, wherein this magnetic conductive part has first junction surface, and this second magnetic guiding loop has second junction surface, and this first junction surface and this second junction surface are bonded with each other.
8, filter element as claimed in claim 7, wherein this first junction surface or this second junction surface comprise at least one recess or at least one protruding part.
9, filter element as claimed in claim 1, wherein this magnetic conductive part has the first sub-magnetic conductive part and the second sub-magnetic conductive part, and both are corresponding to engage.
10, filter element as claimed in claim 9, wherein this first sub-magnetic conductive part and this second sub-magnetic conductive part respectively have composition surface, plane, inclined plane or cascaded surface with the joint that contacts with each other.
11, filter element as claimed in claim 9, wherein this first sub-magnetic conductive part and this second sub-magnetic conductive part engage by the mode that fixes, fastens or glue together.
12, filter element as claimed in claim 1, it more comprises an insulating barrier, is arranged between this first magnetic guiding loop and this second magnetic guiding loop.
13, a kind of manufacture method of filter element comprises:
Second magnetic guiding loop is coated first magnetic guiding loop;
Two coilings are wound in this second magnetic guiding loop respectively; And
With magnetic conductive part and this second magnetic guiding loop winding.
14, manufacture method as claimed in claim 13, wherein this magnetic conductive part has the first sub-magnetic conductive part and the second sub-magnetic conductive part, and the step of this magnetic conductive part being inserted the opening of this second magnetic guiding loop more comprises following substep:
This first sub-magnetic conductive part is gone into by a side of this opening of this second magnetic guiding loop, and be connected with the interior ring surface of this second magnetic guiding loop;
This second sub-magnetic conductive part is inserted by the opposite side of this opening of this second magnetic guiding loop, and be connected with the interior ring surface of this second magnetic guiding loop; And
With this first sub-magnetic conductive part and the corresponding joint of this second sub-magnetic conductive part.
15, manufacture method as claimed in claim 14, wherein this first sub-magnetic conductive part respectively has composition surface, plane, inclined plane or cascaded surface with this second sub-magnetic conductive part and engages to contact with each other.
16, manufacture method as claimed in claim 14, wherein this first sub-magnetic conductive part and this second sub-magnetic conductive part engage by the mode that fixes, fastens or glue together.
17, manufacture method as claimed in claim 13 wherein more comprises this first magnetic guiding loop is coated an insulating barrier, just this second magnetic guiding loop is coated this insulating barrier afterwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710148123XA CN101377972A (en) | 2007-08-28 | 2007-08-28 | Filter element and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710148123XA CN101377972A (en) | 2007-08-28 | 2007-08-28 | Filter element and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101377972A true CN101377972A (en) | 2009-03-04 |
Family
ID=40421460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200710148123XA Pending CN101377972A (en) | 2007-08-28 | 2007-08-28 | Filter element and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101377972A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103456465A (en) * | 2013-08-30 | 2013-12-18 | 昆山佑翔电子科技有限公司 | Telescopic magnetic ring |
| CN105788804A (en) * | 2014-12-23 | 2016-07-20 | 台达电子工业股份有限公司 | Magnetic assembly suitable for bank winding process |
| CN106601431A (en) * | 2016-11-08 | 2017-04-26 | 合肥博微田村电气有限公司 | Common-mode and differential-mode inductor |
| CN107045916A (en) * | 2017-06-01 | 2017-08-15 | 广东美的制冷设备有限公司 | Choke and household electrical appliance |
-
2007
- 2007-08-28 CN CNA200710148123XA patent/CN101377972A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103456465A (en) * | 2013-08-30 | 2013-12-18 | 昆山佑翔电子科技有限公司 | Telescopic magnetic ring |
| CN103456465B (en) * | 2013-08-30 | 2015-12-02 | 昆山佑翔电子科技有限公司 | Flexible magnet ring |
| CN105788804A (en) * | 2014-12-23 | 2016-07-20 | 台达电子工业股份有限公司 | Magnetic assembly suitable for bank winding process |
| CN106601431A (en) * | 2016-11-08 | 2017-04-26 | 合肥博微田村电气有限公司 | Common-mode and differential-mode inductor |
| CN107045916A (en) * | 2017-06-01 | 2017-08-15 | 广东美的制冷设备有限公司 | Choke and household electrical appliance |
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Open date: 20090304 |