CN101692385A - Inductor and manufacturing method thereof - Google Patents

Inductor and manufacturing method thereof Download PDF

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Publication number
CN101692385A
CN101692385A CN200910189837A CN200910189837A CN101692385A CN 101692385 A CN101692385 A CN 101692385A CN 200910189837 A CN200910189837 A CN 200910189837A CN 200910189837 A CN200910189837 A CN 200910189837A CN 101692385 A CN101692385 A CN 101692385A
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CN
China
Prior art keywords
inductor
magnetic core
magnetic
enamelled wire
resin
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Pending
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CN200910189837A
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Chinese (zh)
Inventor
吴卫生
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吴卫生
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Priority to CN200910189837A priority Critical patent/CN101692385A/en
Publication of CN101692385A publication Critical patent/CN101692385A/en
Pending legal-status Critical Current

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Abstract

The invention relates to an inductor, in particular to an inductor which can bear heavier current and has good electrical properties and a manufacturing method thereof. The inductor comprises a magnetic core, wherein a varnished wire is coiled on the magnetic core, the varnished wire is in conductive connection with a bonding pad or a pin guide pin, and the outside of the magnetic core is perfused with a magnetic powder resin mixture. The manufacturing method not only can be suitable for a chip inductor but also can be suitable for a plug-in inductor. The inductor and the manufacturing method have the following advantages: the varnished wire is coiled on the magnetic core, the end part of the varnished wire is in conductive connection with the base bonding pad or the guide pin, and the periphery of a magnetic material coiled with the varnished wire is provided with a plastic cover to improve the insulating property of the inductor and facilitate the perfusion of the magnetic powder resin mixture therein. The electrical properties of the inductor are improved, an open magnetic circuit becomes a closed magnetic circuit, the electromagnetic interference resistance is greatly improved, the current withstanding property is improved, the electric resistance is reduced, and the inductors suitable for customer requirements can be manufactured by selecting different magnetic powder and different mixing ratios.

Description

A kind of inductor and preparation method thereof
Technical field
The present invention relates to a kind of inductor, refer more particularly to and a kind ofly can bear big electric current and have inductor of good electrical characteristic and preparation method thereof.
Background technology
Existing inductor comprises SMT Inductor and plug-in unit inductor, and these two kinds of inductors mainly are coiling enamelled wires on magnetic core, and enamelled wire is connected with guide pin or pad conducting.In the process of using research through the inventor for a long time, found the following weak point of existing inductor, can be poor iff characteristics such as the anti-electric current of the thread inductor of coiling enamel-cover on magnetic core and anti-electromagnetic interference, and also have certain hidden danger etc. aspect reliability and the reliability.
Based on the weak point of above-mentioned existing inductor, the inventor has designed the present invention's " a kind of inductor and preparation method thereof ".
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art technical problem to be solved is: a kind of inductor that has the anti-current characteristics of inductor and reliability and reliability now and preparation method thereof that is used to improve is provided.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of inductor comprises magnetic core, coiling enamelled wire on magnetic core, and enamelled wire is connected with pad or the conducting of pin guide pin, and the described magnetic core outside is perfused with magnet powder-resin compound.Described magnetic core outside mask is provided with a plastic cement cover, is perfused with magnet powder-resin compound between outer cover and magnetic core.After the perfusion magnet powder-resin compound, improved the electrical characteristic of inductor, and magnetic circuit becomes closed magnetic circuit by open-flux path, improve anti-electromagnetic interference performance greatly; Anti-current characteristics improves greatly simultaneously, and the resistance of itself can significantly reduce.Both be applicable to SMT Inductor, also gone for the plug-in unit inductor.
Described outer cover is the plastic cement cover, and it is made with plastic material, and magnet powder-resin compound can also freely select whether to remove outer cover after solidifying.
Described magnetic core is provided with pad or pin guide pin.
A kind of manufacture method of above-mentioned inductor comprises magnetic core, coiling enamelled wire on magnetic core, the enamelled wire end is connected with pad or the conducting of pin guide pin, described magnetic core places outer cover, at outer cover and be wound with between the magnetic core of enamelled wire and fill magnet powder-resin compound, becomes finished product after solidifying.After solidifying, also can not use the plastic cement outer cover filling magnet powder-resin compound.
Described magnet powder-resin compound is to require pastel that magnetic and resin are mixed according to a certain percentage according to electrical characteristic.
Described magnetic is a soft magnetic ferrite.Magnetic can require according to the application characteristic of product to select.
Described soft magnetic ferrite is Ni-Zm ferrite powder, Mn-Zn ferrite powder or other soft magnetic ferrite powder.
Described resin is a liquid-state epoxy resin.
The ratio of described magnetic and resin is 1: 3~3: 1, decides by electrical requirement.
The beneficial effect of a kind of inductor of the present invention and preparation method thereof is:
Coiling enamelled wire on magnetic core, the enamelled wire end is connected with base pad or guide pin conducting, increases the insulating properties that the plastic cement cover can improve inductor around the magnetic material of the good enamelled wire of coiling, also is convenient to pour into therein magnet powder-resin compound.After the perfusion magnet powder-resin compound, improved the electrical characteristic of inductor, and magnetic circuit becomes closed magnetic circuit by open-flux path, improve anti-electromagnetic interference performance greatly; Anti-current characteristics improves greatly simultaneously, and the resistance of itself can significantly reduce; In addition, according to client's different requirements, can select different magnetics and different mixed proportions to make the inductor that is fit to customer requirement.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
The STRUCTURE DECOMPOSITION schematic diagram of Fig. 1 the has been coiling magnetic core of enamelled wire (band pin guide pin) and outer cover;
The overall structure schematic diagram of Fig. 2 the has been coiling magnetic core of enamelled wire (band pin guide pin) and outer cover;
Fig. 3 is the overall structure schematic diagram of filling magnet powder-resin compound between magnetic core and the outer cover;
The STRUCTURE DECOMPOSITION schematic diagram of Fig. 4 the has been coiling magnetic core of enamelled wire (tape welding dish) and outer cover;
The overall structure schematic diagram of Fig. 5 the has been coiling magnetic core of enamelled wire (tape welding dish) and outer cover;
Fig. 6 is the overall structure schematic diagram of filling magnet powder-resin compound between magnetic core and the outer cover.
Description of reference numerals:
10, magnetic core 20, enamelled wire 30, outer cover
40, magnet powder-resin compound 50, pin guide pin or pad
Embodiment
Referring to figs. 1 through Fig. 6, the present invention implements like this:
A kind of inductor comprises magnetic core 10, coiling enamelled wire 20 on magnetic core 10, and enamelled wire 20 is connected with pad or 50 conductings of pin guide pin, and described magnetic core 10 outside mask are provided with an outer cover 30, are perfused with magnet powder-resin compound 40 between outer cover 30 and magnetic core 10.In an embodiment, outer cover 30 is the plastic cement cover, and magnetic core 10 is provided with pad or pin guide pin 50.
The method one of making above-mentioned inductor is: coiling enamelled wire 20 on magnetic core 10 at first, enamelled wire 20 ends are connected with pad or 50 conductings of pin guide pin, magnetic core 10 places outer cover 30, at outer cover 30 and be wound with between the magnetic core 10 of enamelled wire 20 and fill magnet powder-resin compound 40, after solidifying, become finished product.Wherein the magnetic in the magnet powder-resin compound 40 is the Ni-Zn ferrite powder, and resin is a liquid-state epoxy resin.Wherein the ratio of magnetic and resin is 1: 1.
The method two of making above-mentioned inductor is: coiling enamelled wire 20 on magnetic core 10 at first, enamelled wire 20 ends are connected with pad or 50 conductings of pin guide pin, magnetic core 10 places outer cover 30, at outer cover 30 and be wound with between the magnetic core 10 of enamelled wire 20 and fill magnet powder-resin compound 40, after solidifying, become finished product.
Two kinds of above methods also can not used plastic cement outer cover 30 filling magnet powder-resin compound 40 after solidifying.
Wherein magnet powder-resin compound 40 is Mn-Zn ferrite powders, and resin is a liquid-state epoxy resin.Wherein the ratio of magnetic and resin is 2: 1.
The above, it only is the preferred embodiment of a kind of inductor of the present invention, be not that technical scope of the present invention is imposed any restrictions, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention above any trickle modification, equivalent variations and modification that embodiment did.

Claims (9)

1. an inductor comprises magnetic core (10), goes up coiling enamelled wire (20) at magnetic core (10), and enamelled wire (20) is connected with pad or pin guide pin (50) conducting, it is characterized in that: described magnetic core (10) outside is perfused with magnet powder-resin compound (40).
2. a kind of inductor according to claim 1 is characterized in that described magnetic core (10) outside mask is provided with a plastic cement cover (30), is perfused with magnet powder-resin compound (40) between outer cover (30) and magnetic core (10).
3. a kind of inductor according to claim 1 is characterized in that described outer cover (30) makes with plastic material.
4. a kind of inductor according to claim 1 is characterized in that described magnetic core (10) is provided with pad or pin guide pin (50).
5. the manufacture method of an above-mentioned inductor, it is characterized in that: comprise magnetic core (10), go up coiling enamelled wire (20) at magnetic core (10), enamelled wire (20) end is connected with pad or pin guide pin (50) conducting, described magnetic core (10) places outer cover (30), at outer cover (30) and be wound with between the magnetic core (10) of enamelled wire (20) and fill magnet powder-resin compound (40), after solidifying, become finished product.
6. manufacture method according to claim 5 is characterized in that described magnet powder-resin compound (40) is the pastel that requirement mixes according to a certain percentage with different magnetics and resin according to electrical characteristic.
7. manufacture method according to claim 5 is characterized in that described magnetic is a soft magnetic ferrite.
8. manufacture method according to claim 5 is characterized in that described resin is a liquid-state epoxy resin.
9. manufacture method according to claim 5, the ratio that it is characterized in that described magnetic and resin is 1.3~3: 1.
CN200910189837A 2009-09-01 2009-09-01 Inductor and manufacturing method thereof Pending CN101692385A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200910189837A CN101692385A (en) 2009-09-01 2009-09-01 Inductor and manufacturing method thereof

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Application Number Priority Date Filing Date Title
CN200910189837A CN101692385A (en) 2009-09-01 2009-09-01 Inductor and manufacturing method thereof

Publications (1)

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CN101692385A true CN101692385A (en) 2010-04-07

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CN (1) CN101692385A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102306532A (en) * 2011-05-26 2012-01-04 江苏泰昌电子有限公司 Large current magnetic shielding inductor
CN102360724A (en) * 2011-06-29 2012-02-22 万齐 Cold-pressing molding method for magnetic inductor
CN102360723A (en) * 2011-06-29 2012-02-22 万齐 Injection molding method for magnetic inductor
CN101752059B (en) * 2010-01-18 2012-07-04 深圳顺络电子股份有限公司 Winding power inductance component and manufacturing method thereof
CN102810393A (en) * 2011-05-31 2012-12-05 美桀电子科技(深圳)有限公司 Non-high voltage solid packaging method of coil electronic assembly and coil electronic component
CN102810392A (en) * 2011-05-31 2012-12-05 美桀电子科技(深圳)有限公司 Thin closed magnetic circuit inductor and manufacturing method thereof
CN103489567A (en) * 2013-09-13 2014-01-01 华为技术有限公司 Common mode inductor
CN103887712A (en) * 2013-09-22 2014-06-25 重庆力华科技有限责任公司 Electromagnetic shielding material and spark plug cap
CN104217848A (en) * 2013-05-31 2014-12-17 苏州隆亿电子科技有限公司 Magnetic shielding inductance element manufacturing method and magnetic shielding inductance element
CN104465021A (en) * 2014-11-14 2015-03-25 长兴和兴电子有限公司 Inductance element and preparation process thereof
CN105321686A (en) * 2014-07-17 2016-02-10 叶敬才 SMD inductance device with magnetic rubber coating iron core and processing technology thereof
CN107871589A (en) * 2017-05-31 2018-04-03 洪豪立 Electrodeless formula graphene smoothing choke and preparation method thereof

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101752059B (en) * 2010-01-18 2012-07-04 深圳顺络电子股份有限公司 Winding power inductance component and manufacturing method thereof
CN102306532A (en) * 2011-05-26 2012-01-04 江苏泰昌电子有限公司 Large current magnetic shielding inductor
CN102810393A (en) * 2011-05-31 2012-12-05 美桀电子科技(深圳)有限公司 Non-high voltage solid packaging method of coil electronic assembly and coil electronic component
CN102810392A (en) * 2011-05-31 2012-12-05 美桀电子科技(深圳)有限公司 Thin closed magnetic circuit inductor and manufacturing method thereof
CN102810392B (en) * 2011-05-31 2015-06-17 美桀电子科技(深圳)有限公司 Thin closed magnetic circuit inductor and manufacturing method thereof
CN102810393B (en) * 2011-05-31 2015-03-11 美桀电子科技(深圳)有限公司 Non-high voltage solid packaging method of coil electronic assembly and coil electronic component
CN102360724A (en) * 2011-06-29 2012-02-22 万齐 Cold-pressing molding method for magnetic inductor
CN102360723A (en) * 2011-06-29 2012-02-22 万齐 Injection molding method for magnetic inductor
CN104217848A (en) * 2013-05-31 2014-12-17 苏州隆亿电子科技有限公司 Magnetic shielding inductance element manufacturing method and magnetic shielding inductance element
CN103489567A (en) * 2013-09-13 2014-01-01 华为技术有限公司 Common mode inductor
CN103887712A (en) * 2013-09-22 2014-06-25 重庆力华科技有限责任公司 Electromagnetic shielding material and spark plug cap
CN103887712B (en) * 2013-09-22 2016-04-13 重庆力华科技有限责任公司 electromagnetic shielding material and spark plug cap
CN105321686A (en) * 2014-07-17 2016-02-10 叶敬才 SMD inductance device with magnetic rubber coating iron core and processing technology thereof
CN104465021A (en) * 2014-11-14 2015-03-25 长兴和兴电子有限公司 Inductance element and preparation process thereof
CN104465021B (en) * 2014-11-14 2017-07-07 长兴和兴电子有限公司 Inductance element and its preparation technology
CN107871589A (en) * 2017-05-31 2018-04-03 洪豪立 Electrodeless formula graphene smoothing choke and preparation method thereof
WO2018219263A1 (en) * 2017-05-31 2018-12-06 姚炯深 Stepless graphene filter choke and manufacturing method thereof

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Open date: 20100407