CN100524549C - Wire winding typed choking winding - Google Patents
Wire winding typed choking winding Download PDFInfo
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- CN100524549C CN100524549C CNB2005100731949A CN200510073194A CN100524549C CN 100524549 C CN100524549 C CN 100524549C CN B2005100731949 A CNB2005100731949 A CN B2005100731949A CN 200510073194 A CN200510073194 A CN 200510073194A CN 100524549 C CN100524549 C CN 100524549C
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052737 gold Inorganic materials 0.000 claims abstract description 6
- 239000010931 gold Substances 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- 229910052709 silver Inorganic materials 0.000 claims abstract description 6
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Abstract
A layer of gold, silver, nickel or tin etc. conductor is plated on surface of metallic fiber material of conducting wire conductor used by wire winding type choker. Then, a layer of insulation film is coated on the said plated layer so as to form isolation covered plated conducting wire. Terminal (electrode) can be formed after the said insulation film on two ends of conducting wire being divested and conducting wire being wound to winding, without need of any treatment of moistening tin or plating. Core material with chamfers (R angle or C angle) at two ends is plated at two ends in advance. Insertion inside diameter of the core material is smaller than winding slightly. Using tension of winding itself fastens the core material, which is not easily to be shed off. There are electroplated coating on both ends of winding and core material. Thus, capability for soldering choker on circuit is raised so as to form the disclosed choker.
Description
Technical field
The invention relates to a kind of wire winding typed choking winding, be meant especially and a kind ofly shorten the choking winding manufacturing process and reduce cost, to reach the wire winding typed choking winding of a large amount of manufacturing purposes.
Background technology
Traditional wire winding typed choking winding or hollow coil, the structure of its terminal all is the two ends in coil, with parallel upright or the rectangular scolding tin lead of bending plug-in type or the surface stuck terminal when welding with circuit board, the overall structure of this choking winding then is after directly being wound in core with insulation-coated lead, fix with adhesive agent again, but the choking winding of this kind structure or hollow coil are in part miniaturization day by day now, no matter in the production procedure of reduction coil or the automation assembling of core its difficulty is arranged all, so can't reach the purpose of a large amount of productions to reduce cost.
Fig. 1 (a) is traditional wire winding typed choking winding 7, because size is bigger, therefore can directly insulation-coated lead 71 be wound on the core 72 and fix to prevent that core from coming off with adhesive agent, the terminal 711 (electrode) at its two ends also only can be the design of plug-in type (Dip Type).But when desiring to be designed to 0805,0603,0402 miniature dimensions such as (EIA) as if choking winding 7, owing to undersized being difficult for is wound in insulation-coated lead 71 on the core 12, so the pattern of plug-in type is in fact degree of difficulty is high.
Fig. 2 (a), Fig. 2 (b) and Fig. 3 (a), Fig. 3 (b) are existing small-sized SMD LED surface-mount device LED (SMD) hollow coil 8,9, though its size can be as small as 0805,0603,0402 (EIA), but when desire assembling core becomes choking winding, then because of behind the core insertion coil 8,9, to cause terminal (electrode) angle that the two ends surface mount uses to change, and can't parallel usefulness as scolding tin with circuit board; If it is little core than coil 8,9 internal diameters that desire is used external diameter, to fix with adhesive agent after then inserting, but also be difficult for because of undersized processing or adhesive agent easily diffusion cause the insulation of terminal.
This shows that above-mentioned prior art article still have many disappearances, real non-one kindhearted design and demand urgently being improved.
Every shortcoming that this case inventor is derived in view of above-mentioned prior art wire winding typed choking winding is urgently to think to be improved innovation, and after concentrating on studies through taking great pains to attain one's goal for many years, successfully wire winding typed choking winding of the present invention is finished in research and development finally.
Summary of the invention
Main purpose of the present invention is to provide a kind of reduction choking winding manufacturing process and reducing cost that provides, to reach the wire winding typed choking winding of a large amount of manufacturing purposes.
Of the present invention time a purpose is to provide a kind of choking winding, and this coil uses insulation-coated electroplated lead, makes its two ends after divesting dielectric film and being wound into coil, need not carry out the wire winding typed choking winding of technologies such as tin sticky or plating.
Can reach the wire winding typed choking winding of foregoing invention purpose, employed lead is a metal wire rod, and electroplate conductors such as gold, silver, nickel or tin in advance in this metal wire material surface, and one deck dielectric film that is covered thereon, make this lead form insulation-coated electroplated lead, technologies such as tin sticky or plating need not carried out in the two ends that cause this insulation-coated electroplated lead after divesting dielectric film and being wound into coil, the terminal (electrode) that can use as scolding tin and can directly being used on the circuit board; These lead two ends that divest dielectric film and be wound into coil form one near a circle but less than the terminal (electrode) of a circle, divest the time of dielectric film with saving; And the core that two ends have a chamfering (R angle or C angle) is inserted in this choking winding, because the external diameter of this core is slightly larger than the internal diameter of choking winding, therefore utilize the tension force of the coil core that links closely itself to make its difficult drop-off; And the core both ends of the surface can be imposed electroplating processes in advance, after core inserts coil, can promote the solderability of this choking winding on circuit board.
The present invention includes only a coil, and the wire winding typed choking winding of a core can also be to comprise two coil, the common mode choking winding of two cores.A described coil, the wire winding typed choking winding of a core is composed as follows:
One coil, according to the required number of turns and internal diameter, connecting airtight or loose mode is reeled and formed, and its two ends respectively are a terminal electrode less than a circle by insulation-coated lead for it, described insulation-coated lead is by electroplating one deck conductor in advance on metal wire rod, impose insulation-coated again and make; One core, its two ends respectively have a chamfering, and the external diameter of this core is slightly larger than the internal diameter of coil; Be that core is inserted in the coil, utilize the tension force of the coil core that links closely itself, make its difficult drop-off.
Wherein the core both ends of the surface can also be electroplated an electrodeposited coating in advance.
Described common mode choking winding is composed as follows:
Two coils, according to the required number of turns and internal diameter, connecting airtight or loose mode is reeled and formed, and its two ends respectively are a terminal electrode less than a circle by insulation-coated lead for it, described insulation-coated lead is by electroplating one deck conductor in advance on metal wire rod, impose insulation-coated again and make; Two cores, its length slightly is longer than coil; Be that core is inserted respectively in two coils, make outside outstanding two coils in its two ends; The external diameter of described core is slightly larger than the internal diameter of described coil; Two square tabular magnetics, it is provided with two holes; Be that jag with two cores is incorporated into respectively in two square shape magnetics, two holes, cause two square tabular magnetics to be assemblied in two core two ends, coated with the resin protecting cover again, so, can be constituted common mode choking winding (Common Mode Choke Coil).
The present invention also provides a kind of wire winding typed choking winding, comprising:
Two coils, according to the required number of turns and internal diameter, connecting airtight or loose mode is reeled and formed, and its two ends respectively are a terminal electrode less than a circle by insulation-coated lead for it, described insulation-coated lead is by electroplating one deck conductor in advance on metal wire rod, impose insulation-coated again and make;
Two magnetics that slightly take the shape of the letter U have two magnetic cores on this U-shaped magnetic, are that two magnetic cores with two U-shaped magnetics insert in two coils via the two ends of two coils respectively, are coated with the resin protecting cover again, can constitute the common mode choking winding; The external diameter of described magnetic core is slightly larger than the internal diameter of described coil.
The present invention also provides a kind of wire winding typed choking winding, comprising:
Two coils, according to the required number of turns and internal diameter, connecting airtight or loose mode is reeled and formed, and its two ends respectively are a terminal electrode less than a circle by insulation-coated lead for it, described insulation-coated lead is by electroplating one deck conductor in advance on metal wire rod, impose insulation-coated again and make;
One magnetic that slightly takes the shape of the letter U, have two magnetic cores on this U-shaped magnetic, again two coils are inserted in respectively on the magnetic core of this U-shaped magnetic, make outside outstanding two coils in the other end of magnetic core, and on the jag of this magnetic core, assemble the square tabular magnetic of an identical material again, coated with the resin protecting cover again, promptly constituted the common mode choking winding; The external diameter of described magnetic core is slightly larger than the internal diameter of described coil.
Description of drawings
Fig. 1 (a), Fig. 1 (b) are prior art choking winding schematic diagram;
Fig. 2 (a), Fig. 2 (b) are another prior art hollow coil schematic diagram;
Fig. 3 (a), Fig. 3 (b) are another prior art hollow coil schematic diagram;
Fig. 4 (a), Fig. 4 (b), Fig. 4 (c) are the schematic appearance of wire winding typed choking winding of the present invention;
Fig. 5 (a), Fig. 5 (b) are another schematic appearance of wire winding typed choking winding of the present invention;
Fig. 6 (a), Fig. 6 (b) are the application schematic diagram of Fig. 5 (a), Fig. 5 (b);
Fig. 7 (a), Fig. 7 (b) are oval-shaped schematic diagram for the coil of wire winding typed choking winding of the present invention and core;
Fig. 8 (a), Fig. 8 (b) are square schematic diagram for the coil of wire winding typed choking winding of the present invention and core.
Fig. 9 (a), Fig. 9 (b) implement schematic diagram for first of wire winding typed choking winding of the present invention;
Figure 10 (a), Figure 10 (b) implement schematic diagram for second of wire winding typed choking winding of the present invention;
Figure 11 (a), Figure 11 (b) implement schematic diagram for the 3rd of wire winding typed choking winding of the present invention;
Figure 12 (a), Figure 12 (b) are common mode choking winding first schematic diagram of wire winding typed choking winding of the present invention;
Figure 13 (a), Figure 13 (b) are common mode choking winding second schematic diagram of wire winding typed choking winding of the present invention;
Figure 14 (a), Figure 14 (b) are common mode choking winding the 3rd schematic diagram of wire winding typed choking winding of the present invention;
Figure 15 (a), Figure 15 (b) use schematic diagram for first of wire winding typed choking winding of the present invention;
Figure 16 (a), Figure 16 (b) use schematic diagram for second of wire winding typed choking winding of the present invention.
Drawing reference numeral explanation: 1 choking winding; 11 coils; 111 terminals; 12 cores; 121 chamferings; 122 electrodeposited coatings; 2 square hollow metal conductors; 4 resins; The 5-L mode filter; 51 electric capacity; 7 choking windings; 71 insulation-coated leads; 711 terminals; 72 cores; 8 hollow coils; 9 hollow coils; 10 square tabular magnetics; 101 first holes; 102 second holes; 20-U shape magnetic; 201 magnetic cores; 30-U shape magnetic; 301 magnetic cores.
Embodiment
See also shown in Fig. 4 (a), Fig. 4 (b), Fig. 4 (c), be wire winding typed choking winding 1 of the present invention: mainly comprise:
One coil 11, this coil 11 be by an insulation-coated lead according to the required number of turns and internal diameter, to connect airtight or loose mode is reeled and formed, the two ends of this coil 11 be the terminal 111 (electrode) (shown in Fig. 4 (b)) near a circle (enclosing less than one); And these coil 11 employed leads itself are electroplated various conductors such as one deck gold, silver, tin, nickel in advance behind metal wire rod, impose insulation-coated again, make this lead need not do any processing after divesting dielectric film and being wound into coil, its both ends can become the terminal 111 (electrode) that scolding tin is used; And the thickness of this lead is looked desirable characteristics and is selected for use; In addition, this coil 11 also can use the twisted wire (Litz line) that is formed by several insulation-coated lead twisteds; And this coil 11 can be because of required characteristic, and coil 11 is multilaminate coiled back and forth continuously with same lead, or with the tight cover repeatedly of hollow coil 11 multilayers of different conductor and internal diameter;
One core 12, the two ends of this core 12 have a chamfering 121 (R angle or C angle), and the external diameter of this core 12 is slightly larger than the internal diameter of coil 11; See through the chamfering 121 at core 12 two ends, make core 12 to be inserted in easily in the coil 11, and utilize the tension force of coil 11 core 12 that links closely itself to make its difficult drop-off; The both ends of the surface of this core 12 also can be electroplated one deck electrodeposited coating 122 in advance; The material of this core 12 can be ferrite (Ferrite), pottery, glass or other material.
In addition, and the terminal 111 (electrode) at coil two ends and the electrodeposited coating 122 of core 12 both ends of the surface can be given the tin sticky processing simultaneously, make the two end terminals 111 (electrode) of coil 11 and core 12 both ends of the surface form a termination electrode of finishing, so as to promoting solderability.
And for example shown in Fig. 5 (a), Fig. 5 (b), it is identical with coil 11 that the length of this core 12 is not limited to, if the length of core 12 is slightly long than coil 11, and protrude in coil 11 when outer, the ledge of core 12 can be imposed electrodeposited coating 122 equally and handle, to promote the fastness of core 12 scolding tin on circuit board.For avoiding the choking winding 1 shown in Fig. 5 (a), Fig. 5 (b) on circuit board, can arbitrarily not roll during scolding tin, can on the outer part of the outstanding coils 11 of core 12, assemble the square hollow metal conductor 2 of electroplating processes, can promote the stability of choking winding 1 when welding, shown in Fig. 6 (a), Fig. 6 (b).
Moreover, because the compact demand of electronic product size, employed assembly also is required minification and reduces height on the circuit board, choking winding of the present invention is for reducing height, and the shape of its coil 11 and core 12 also can be elliptical shape shown in Fig. 7 (a), Fig. 7 (b) and the square shape shown in Fig. 8 (a), Fig. 8 (b).
See also again shown in Fig. 9 (a), Fig. 9 (b) and Figure 10 (a), Figure 10 (b) and Figure 11 (a), Figure 11 (b), no matter be circular, square or oval-shaped coil 11 and core 12, its outside all can use materials such as resin 4, ferrite (Ferrite) or pottery to be coated, with the purpose that reaches easy to use and cover.
Main making step of the present invention is:
Step 1: earlier the metal wire material surface of choking winding lead is electroplated conductors such as one deck gold, silver, nickel or tin, a dielectric film again is covered on this wire rod, make this lead form insulation-coated electroplated lead, its purpose is can become after two ends divest dielectric film and are wound into coil to electroplate to use terminal, be wound into behind the coil the back technology that collective electroplates to exempt the tin sticky technology after divesting dielectric film in the conventional coil technology or to divest dielectric film, thereby shorten manufacturing process, reduction fraction defective, and then reduce cost significantly;
Step 2: two ends dielectric film that again will this insulation-coated electroplated lead divests and is wound into coil, the terminal (electrode) that makes the coil two ends directly form scolding tin to use, and these two ends (electrode) that divest dielectric film and be wound into coil are for divesting the process time of dielectric film with saving near a circle (less than a circle);
Step 3: get the core that two ends all have chamfering (R angle or C angle) again, the both ends of the surface of this core also can impose electroplating processes in advance, again core is inserted in internal diameter and is slightly less than in the coil of core external diameter, utilize the tension force of the coil core that links closely itself to make its difficult drop-off; And because the terminal (electrode) and the core both ends of the surface at these coil two ends all have electrodeposited coating, cause core to insert coil after, the side of terminal of this coil (electrode) and core is all the good electrode of solderability; And because coil and core are all cylindrical configuration, its surface there is no any protrusion, makes it be easy to roll and arrange, therefore, permutation and use automation equipment apace core to be inserted in the coil easily in follow-up assembling operation promptly forms the choking winding of this part.
In addition, after core inserts coil, again coil and core two ends are given tin sticky or electroplating processes simultaneously, make the terminal (electrode) of coil and the both ends of the surface of core be combined into a complete termination electrode, to promote the solderability of this choking winding on circuit board.
If choking winding of the present invention 1 is when being made up two, and its structure can change becomes common mode choking winding (Common Mode Choke Coil).
Shown in Figure 12 (a), Figure 12 (b), be that two choking windings 1 are combined into a common mode choking winding (Common Mode Choke Coil) with two square tabular magnetics 10; Wherein, the length of this core 12 slightly is longer than coil 11, and the two ends of core 12 can be protruded in outside the two ends of coil 11; The material that this square tabular magnetic adopted is identical with core 12, on it and be provided with first hole 101 and second hole 102; Be that two cores, 12 ledges with two choking windings 1 are incorporated into respectively on first, second hole 101,102 of two square tabular magnetics 10, cause two square tabular magnetics 10 to be assemblied in the two ends of two choking windings 1, coated with resin 4 protecting covers, so compound mode can constitute common mode choking winding (Common Mode Choke Coil) again.
Shown in Figure 13 (a), Figure 13 (b), wherein, described two cores 12 of Figure 12 (a), Figure 12 (b) magnetic 20 that can also two slightly takes the shape of the letter U substitutes, have two magnetic cores 201 on this U-shaped magnetic 20, be that two magnetic cores 201 of two U-shaped magnetics 20 are inserted in two coils 11 via the two ends of two coils 11 respectively, coated with resin 4 protecting covers, so compound mode can constitute common mode choking winding (Common Mode Choke Coil) equally again.
As Figure 14 (a), shown in Figure 14 (b), wherein, Figure 12 (a), described two cores 12 of Figure 12 (b) magnetic 30 that can also slightly takes the shape of the letter U substitutes, have two magnetic cores 301 on this U-shaped magnetic 30, again two coils 11 are inserted in respectively on the magnetic core 301 of this U-shaped magnetic 30, make outside outstanding two coils 11 in the other end of magnetic core 301, and on the jag of this magnetic core 301, assemble the square tabular magnetic 10 of an identical material again, coated with resin 4 protecting covers, so compound mode can constitute common mode choking winding (Common Mode Choke Coil) equally again.
Simultaneously, consider when the user avoids designing the LC filter circuit complicated calculating, save area and easy to usely be purpose, choking winding of the present invention can encapsulation in parallel with electric capacity after, constitute integration SMD LED surface-mount device LED (SMD) filter of various different frequency ranges, proof voltage, anti-electric current.But because cost certainly will increase, therefore the selection in order to provide the user to reduce cost, only need pad layout on the circuit board (LandPattern) can be designed to the anti-welding green lacquer of change, the kenel that monomer assemblies such as encapsulation type filter and choking winding and electric capacity are shared.
With outward appearance and convenience serves as when considering, can use the encapsulation type filter of integration, but gets final product if then directly use the assembly of choking winding of the present invention and other monomer when the demand that reduces cost is arranged instead.
See also shown in Figure 15 (a), Figure 15 (b), the L mode filter 5 that is to use choking winding 1 of the present invention and electric capacity 51 to form with resin-encapsulated, its pad layout in circuit board (Land Pattern) and anti-welding green lacquer are shown in Figure 16 (a), but if with shown in Figure 16 (b), (Land Pattern) only changes anti-welding green lacquer with identical pad layout, identical choking winding 1 and electric capacity 51 directly can be used in identical circuit board, can therefore save the extra charge of component package, the dual consideration that provides the user outside outward appearance, convenience, can reduce cost; Aforesaid way is not only applicable to this L mode filter, and other π type, T mode filter that uses several assemblies to constitute is suitable for too.
When wire winding typed choking winding provided by the present invention and other existent technique compare mutually, have more following advantage:
1, the present invention can provide reduction choking winding manufacturing process and reduce cost, to reach the purpose of a large amount of manufacturings.
2, choking winding of the present invention uses insulation-coated electroplated lead, makes its both ends after divesting dielectric film and being wound into coil, need not carry out technologies such as tin sticky or plating.
3, lead of the present invention two ends are near 1 circle but less than the terminal (electrode) of 1 circle, divest the time of dielectric film with saving.
4, coil of the present invention and core are columnar structure, make it can utilize simply and apace permutation and be assembled into choking winding of automatic machinery.
Above-listed detailed description is at the specifying an of possible embodiments of the present invention, and only this embodiment is not in order to limiting claim of the present invention, does not allly break away from the equivalence that skill spirit of the present invention does and implements or change, all should be contained in the claim of this case.
In sum, the present invention not only really belongs to innovation on technological thought, and can promote above-mentioned multinomial effect than the prior art article, should fully meet the legal patent of invention important document of novelty and progressive.
Claims (13)
1, a kind of wire winding typed choking winding is characterized in that: comprising:
One coil, according to the required number of turns and internal diameter, connecting airtight or loose mode is reeled and formed, and its two ends respectively are a terminal electrode less than a circle by insulation-coated lead for it, described insulation-coated lead is by electroplating one deck conductor in advance on metal wire rod, impose insulation-coated again and make;
One core, its two ends respectively have a chamfering, and the external diameter of this core is slightly larger than the internal diameter of coil; Be that core is inserted in the coil, utilize the tension force of the coil core that links closely itself, make its difficult drop-off.
2, wire winding typed choking winding as claimed in claim 1 is characterized in that: the conductor of being electroplated on this metal wire rod is gold, silver, tin or nickel.
3, wire winding typed choking winding as claimed in claim 1 is characterized in that: being shaped as of the cross section of this coil and core is oval or square.
4, wire winding typed choking winding as claimed in claim 1 is characterized in that: this coil and core outside all use resin, ferrite or pottery to be coated, to reach the purpose that coil and core are covered.
5, a kind of wire winding typed choking winding is characterized in that: comprising:
One coil, according to the required number of turns and internal diameter, connecting airtight or loose mode is reeled and formed, and its two ends respectively are a terminal electrode less than a circle by insulation-coated lead for it, described insulation-coated lead is by electroplating one deck conductor in advance on metal wire rod, impose insulation-coated again and make;
One core, its both ends of the surface are electroplated an electrodeposited coating in advance, and its both ends respectively have a chamfering, and the external diameter of core is slightly larger than the internal diameter of coil; Be that core is inserted in the coil, utilize the tension force of the coil core that links closely itself, make its difficult drop-off.
6, wire winding typed choking winding as claimed in claim 5 is characterized in that: the conductor of being electroplated on this winding wire metal wire rod is gold, silver, tin or nickel.
7, wire winding typed choking winding as claimed in claim 5 is characterized in that: the length of this core is slightly long than coil, and protrudes in outside the coil, and the ledge with core imposes electroplating processes equally.
8, wire winding typed choking winding as claimed in claim 7 is characterized in that: this core protrudes on the both ends of coil the assembling one square hollow metal conductor of electroplating processes, so as to promoting the stability of core when the welding.
9, wire winding typed choking winding as claimed in claim 5 is characterized in that: being shaped as of the cross section of this coil and core is oval or square.
10, wire winding typed choking winding as claimed in claim 5 is characterized in that: this coil and core outside all use resin, ferrite or pottery to be coated, to reach the purpose that coil and core are covered.
11, a kind of wire winding typed choking winding is characterized in that: comprising:
Two coils, according to the required number of turns and internal diameter, connecting airtight or loose mode is reeled and formed, and its two ends respectively are a terminal electrode less than a circle by insulation-coated lead for it, described insulation-coated lead is by electroplating one deck conductor in advance on metal wire rod, impose insulation-coated again and make;
Two cores, its length slightly is longer than coil; Be that core is inserted in respectively in two coils, make outside outstanding two coils in its two ends; The external diameter of described core is slightly larger than the internal diameter of described coil;
Two square tabular magnetics are respectively arranged with two holes on it; Be that jag with two cores is incorporated into respectively in two square tabular magnetic two holes, cause two square tabular magnetics to be assemblied in two core two ends, coated with the resin protecting cover again, so, promptly constitute the common mode choking winding.
12, a kind of wire winding typed choking winding is characterized in that, comprising:
Two coils, according to the required number of turns and internal diameter, connecting airtight or loose mode is reeled and formed, and its two ends respectively are a terminal electrode less than a circle by insulation-coated lead for it, described insulation-coated lead is by electroplating one deck conductor in advance on metal wire rod, impose insulation-coated again and make;
Two magnetics that slightly take the shape of the letter U have two magnetic cores on each U-shaped magnetic, are that two magnetic cores with two U-shaped magnetics insert in two coils via the two ends of two coils respectively, are coated with the resin protecting cover again, promptly constitute the common mode choking winding; The external diameter of described magnetic core is slightly larger than the internal diameter of described coil.
13, a kind of wire winding typed choking winding is characterized in that, comprising:
Two coils, according to the required number of turns and internal diameter, connecting airtight or loose mode is reeled and formed, and its two ends respectively are a terminal electrode less than a circle by insulation-coated lead for it, described insulation-coated lead is by electroplating one deck conductor in advance on metal wire rod, impose insulation-coated again and make;
One magnetic that slightly takes the shape of the letter U, have two magnetic cores on this U-shaped magnetic, again two coils are inserted in respectively on the magnetic core of this U-shaped magnetic, make outside outstanding two coils in the other end of magnetic core, and on the jag of this magnetic core, assemble the square tabular magnetic of an identical material again, coated with the resin protecting cover again, promptly constituted the common mode choking winding; The external diameter of described magnetic core is slightly larger than the internal diameter of described coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100731949A CN100524549C (en) | 2005-06-01 | 2005-06-01 | Wire winding typed choking winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100731949A CN100524549C (en) | 2005-06-01 | 2005-06-01 | Wire winding typed choking winding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1873851A CN1873851A (en) | 2006-12-06 |
| CN100524549C true CN100524549C (en) | 2009-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100731949A Expired - Fee Related CN100524549C (en) | 2005-06-01 | 2005-06-01 | Wire winding typed choking winding |
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| CN (1) | CN100524549C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2020155430A (en) * | 2019-03-18 | 2020-09-24 | Ｎｉｔｔｏｋｕ株式会社 | Coil winding device and coil winding method |
| JP2020161215A (en) * | 2019-03-25 | 2020-10-01 | Ｎｉｔｔｏｋｕ株式会社 | Coil winding device and coil winding method |
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| CN1873851A (en) | 2006-12-06 |
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