CN102122538A - Magnetic conductive wire as well as electronic equipment and manufacturing method thereof - Google Patents
Magnetic conductive wire as well as electronic equipment and manufacturing method thereof Download PDFInfo
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- CN102122538A CN102122538A CN2010100012227A CN201010001222A CN102122538A CN 102122538 A CN102122538 A CN 102122538A CN 2010100012227 A CN2010100012227 A CN 2010100012227A CN 201010001222 A CN201010001222 A CN 201010001222A CN 102122538 A CN102122538 A CN 102122538A
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Abstract
The invention discloses a magnetic conductive wire comprising a conducting wire body, and at least one magnetic paint layer and at least one insulated paint layer which are coated at the outer side of the conducting wire body and arranged in a mutually staggered manner, wherein the magnetic material in the magnetic paint layer is non-electrically conductive. Magnetic paint is formed by adding the magnetic material to the insulated paint, and the magnetic paint and the non-magnetic insulated paint are coated at the outer side of the conducting wire body in a staggered manner, thus magnetic field interference generated after the galvanization of the conducting wire body is guided or offset by using the magnetic material, the formation of eddy current of the conducting wire is effectively inhibited, and the purpose of reducing alternating current resistance is achieved.
Description
Technical field
The present invention relates to a kind of magnetic conduction line, relate in particular to a kind of utilize magnetic material for the magnetic line of force of lead own produce disturb or guiding effect to overcome proximity effcet and kelvin effect, to reduce high-frequency ac resistance and to save the magnetic conduction line of energy loss.
Background technology
Devices such as general coil commonly used and transformer, mainly utilize the principle of electromagnetic induction to reach the purpose of controlling inductance or changing voltage, yet energy all loss can occur in each time electric energy and magnetic energy conversion, especially under the operational environment of high frequency, the phenomenon of energy loss is more obvious.Energy loss under this high frequency is mainly decreased (eddy current loss) from eddy current, comprises iron loss that is caused by iron core and the copper loss that comes from enamelled wire.The origin cause of formation of vortex flow comes from that the flux by conductor changes under alternating current, produces the induced current in order to the opposing changes of magnetic field, and this electric current is reverse flow and causes Conductor Impedance to improve in conductor, and this phenomenon is more obvious when power frequency increases.
The loss of iron core generally can improve by the design of its material and structure, utilizes magnetic conductivity (relative permeability) bigger, promptly has the material of low magnetic resistance, can reduce the influence of vortex flow.In addition, adopt the thin silicon steel plates of mutually insulated to pile up iron core and form, when the thickness of silicon steel sheet is thin more, vortex flow is also more little.And add element silicon in iron core, and also can effectively reduce iron core conductivity, reduce the loss that vortex flow causes.
The loss of enamelled wire mainly comes from kelvin effect (skin effect) and proximity effcet (proximity effect) under the high frequency except the ohmic loss of copper cash itself.Kelvin effect is that lead is subjected to self vortex flow influence when high frequency, causes the electric current flow range only to concentrate on the conductor edge part, causes the lead AC resistance to increase.Proximity effcet then is when adjacent conductor is loaded with the high frequency alternating current, each lead is except the magnetic field that self electric current produced, the reciprocation in the magnetic field that is subjected to other lead simultaneously and is produced, cause adjacent wires and produce vortex flow, cause the lead loss significantly to increase, influence its energy conversion efficiency, therefore present related industry be devoted to invariably to develop have more low-loss, the more effective product of conversion work energy.
In order to reduce the ohmic loss of lead, generally can select the high-purity copper material for use or increase copper conductor line footpath.In addition, use low electrical resistant materials such as silver jacketed wire or fine silver line, also can reach the purpose that reduces resistance, yet these practices all can cause the significantly increase of material cost.Because the main cause that AC resistance significantly increases comes from vortex flow,, can reach the purpose that reduces AC impedance if can effectively limit the galvanomagnetic effect that causes vortex flow.At present technology is mainly utilized between stranded conductor induced electromotive force to cancel out each other to suppress vortex flow and is produced, and reaches and reduces AC resistance and lower coil temperature rise phenomenon purpose.Stranded enamelled wire is made up of the fine rule of multiply mutually insulated, and complex process, price are more expensive, and uses accidentally easily that the generating unit intraphase conductor fractures or the bad phenomenon of terminal welding, often thereby cause loss to increase.The notion that magnetic material is applied to enamelled wire disclosed in the CN1242582A patent in existing failed China in 2000 and once was mentioned, this invention utilizes at enamelled wire and mixes 50% above Magnaglo in insulating varnish and impregnating varnish, promote and turn to the magnetic flux density behind the coil and reduce magnetic leakage, to reduce the iron core consumption or to replace iron core.But this patent is not to utilize magnetic material to suppress the enamelled wire vortex flow, does not have the effect that reduces the enamelled wire AC resistance yet.
The day disclosure 2002-231060 patent that Tokyo special electric wire company proposed in 2002, materials such as the iron powder with 50%, nickel powder, iron-nickel alloy add in the coatings makes enamelled wire, make a large amount of metal dusts at the peripheral shielding layer that forms of lead, utilize capture-effect to promote the Q characteristic of high frequency coil.Yet though the metal dust that this patent is used has high magnetic susceptibility, the tool high conductivity is not suitable for coatings simultaneously, add that metal is than great, add quite easy precipitated and separated in the coatings to, can't be applied to long-time volume production operation, also can't keep the due electrical characteristic of enamelled wire.
It is the magnetic resistance enamelled wire that utilizes magnetic resistance (magnetoresistant) material to make that the U.S. discloses No. 2006/0165983 patent, and in order to keep the enamelled wire primary characteristic, the magnetoresistance material addition only is the 0.3-30% with respect to the coating solid content.Its enamelled wire product is applied to general motor coil, though power loss in the time of can reducing motor running and minimizing temperature rise effect, but enamelled wire resistance only descends 0.07%, add to be difficult to overcome dispersiveness and the follow-up key process technology of magnetoresistance material at coatings, its magnetoresistance material addition can't break through 30%.
Summary of the invention
Purpose of the present invention is intended to solve that existing magnetic resistance enamelled wire can't be under the situation of keeping the enamelled wire primary characteristic in the prior art, the content of magnetoresistance material is improved, so can't allow resistance obviously descend and overcome the generation of vortex flow, therefore can't overcome the problem of proximity effcet and kelvin effect.
For this reason, embodiments of the invention propose a kind of utilize magnetic material for the magnetic line of force of lead own produce disturb or guiding effect to overcome proximity effcet and kelvin effect, to reduce high-frequency ac resistance and to save the magnetic conduction line of energy loss.
According to an aspect of the present invention, the embodiment of the invention has proposed a kind of magnetic conduction line, at least one magnetic coating layer and at least one coatings layer of comprising lead body and being coated on the described lead body outside and setting interlaced with each other, the magnetic material in the described magnetic coating layer is non-conductive.
Preferably, each magnetic coating layer comprises coatings and is the magnetic material of 30～50wt% with respect to the solid content of described coatings.
Preferably, each magnetic coating layer is by magnetic material after carrying out surfaction through interfacial agent and even mixing formation of coatings.
Preferably, described interfacial agent is organosilan or oleic acid.
Preferably, described magnetic material comprises two kinds of ferrimagnet (Ferromagnetism) and ferrimagnetic materials (Ferrimagnetism), mainly represent material to comprise, but be not limited in: Ferrites (ferrite) such as γ-Fe2O3, Fe3O4, Ni-Zn series, MnZn system, magnesium zinc system, barium system and strontium system etc., and the average grain diameter of this magnetic material is not more than 3 μ m.
Preferably, the group that is made up of following material of described coatings layer formed: mylar, polyurethane resin, polyurethane resin, imide amic ester resin and polyester imine resin.
Preferably, described lead body can comprise, but be not restricted to: round bare copper wire, flat type bare copper wire, copper-clad aluminum conductor, aluminum steel, tinned wird, and other alloying metal line, general enamelled wire, multilayer insulation line etc.
According to a further aspect in the invention, embodiments of the invention propose a kind of high-frequency inductor, and it comprises aforesaid magnetic conduction line, and described high frequency is 10k to 500k hertz (Hz).
Preferably, described high frequency is 50k to 200k Hz.
In accordance with a further aspect of the present invention, embodiments of the invention propose a kind of high frequency transformer, and it comprises aforesaid magnetic conduction line, and described high frequency is 10k to 500k hertz (Hz).
Preferably, described high frequency is 50k to 200k Hz.
According to another aspect of the invention, embodiments of the invention propose a kind of high-frequency electronic coil, and it comprises aforesaid magnetic conduction line, and described high frequency is 10k to 500k hertz (Hz).
Preferably, described high frequency is 50k to 200k Hz.
According to a further aspect in the invention, embodiments of the invention also provide a kind of power supply unit, and it comprises aforesaid magnetic conduction line.
According to a further aspect in the invention, embodiments of the invention also provide a kind of manufacture method of magnetic conduction line, may further comprise the steps: conductor is provided; And be coated with in the quick mode of many times high temperature moment oven dry at described conductive surface and add at least one magnetic coating layer and at least one coatings layer, each magnetic coating layer comprises coatings and is the magnetic material of 30～50wt% with respect to the solid content of described coatings.
Embodiments of the invention have also proposed a kind of manufacture method of enamelled wire, and this method by magnetizing equipment, is magnetized above-described magnetic conduction line with magnetic material in the magnetic coating layer, to promote the reduction effect of enamelled wire AC resistance under the high frequency.
The present invention adds magnetic material in the coatings and forms magnetic coating, and with do not have the staggered outside that is coated on lead body of coatings of magnetic, so magnetic interference that can produce by the effect guiding or the counteracting lead body energising back of magnetic material, effectively suppress the lead vortex flow and form, reach and reduce the AC resistance purpose.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the profile of looking closely of the present invention's first form.
Fig. 2 is the profile of looking closely of the present invention's second form.
Fig. 3 is the profile of looking closely of the present invention's the 3rd form.
Fig. 4 is the profile of looking closely of the present invention's the 4th form.
Fig. 5 is the profile of looking closely of the present invention's the 5th form.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
The present invention is intended to develop and a kind ofly can be widely used in various high-frequency electronic product, and magnetic conduction line (enamelled wire) with the novel form that reduces high-frequency ac resistance effect, this magnetic conduction line is that magnetic material is added in the coatings, be coated on the lead body skin again, effect by magnetic material guides or offsets the magnetic interference that lead body energising back produces, effectively suppress the lead vortex flow and form, reach and reduce the AC resistance purpose.In order to improve magnetic material addition in the coatings, enamelled wire is the operating type coating magnetic coating through many times high temperature moment oven dry fast, and in order further to promote the reduction effect of magnetic conduction line AC resistance under the high frequency, more can be in magnetic conduction line manufacturing process, allow the magnetic conduction line pass through magnetizing equipment, with the magnetization of the magnetic material in the magnetic coating layer, strengthen guiding or the neutralization effect of magnetic material to wire magnetic fields.
To be subjected to vortex flow that galvanomagnetic effect causes obvious more under high workload frequency more owing to lead body, therefore general lead AC resistance can raise with frequency to be increased, but after adopting enamelled wire of the present invention, under the 10k-500kHz frequency, AC resistance for coil will have obvious inhibition effect, especially be fit to be applied to power supply unit, transformer, inductance and the various high-frequency electronic coil of operating frequency between 50k-200kHz.
The magnetic material that the present invention added not is to reduce the electromagnetic interference of external magnetic field to lead by capture-effect, but utilize magnetic material to overcome proximity effcet and kelvin effect, and then reach the purpose that reduces high-frequency ac resistance and save energy loss for lead self magnetic line of force generation interference or guiding effect.
Therefore magnetic conduction line of the present invention comprises lead body and is coated on outside this lead body and at least one magnetic coating layer of setting interlaced with each other and at least one coatings layer, magnetic material in this magnetic coating layer is non-conductive, and the content of the magnetic material in this magnetic coating layer is good for the 30-50% with respect to the coatings solid content, for magnetic material can evenly be mixed with coatings, magnetic material can be earlier with organosilan or oleic acid etc. as interfacial agent, carry out behind the surfaction again carrying out mixingly, use after forming magnetic coating with coatings.For guaranteeing the coating insulation characterisitic, the magnetic material of selecting for use must not had conductivity, be mainly ferromagnetism (Ferromagnetism) or ferrimagnetism (Ferrimagnetism) two classes, comprise Ferrites (ferrite) such as γ-Fe2O3, Fe3O4, Ni-Zn series, MnZn system, magnesium zinc system, barium system and strontium system etc., can use separately or multiplely add coatings again after mixed; Make the smooth no coarse grain in enamelled wire rear surface in order to make, selected magnetic material average grain diameter system is no more than 3 μ m.
Please referring to shown in Figure 1, shown first form of the present invention, in this form, one deck magnetic coating layer 12 that this magnetic conduction line comprises lead body 10 made of copper, is coated on one deck coatings layer 11 in these lead body 10 outsides and is coated on coatings layer 11 outside.Therefore in this form, this magnetic conduction line comprises coatings layer 11 and magnetic coating layer 12.
Please referring to shown in Figure 2, it has shown second form of the present invention, in this form, one deck coatings layer 22 that this magnetic conduction line comprises lead body 20 made of copper, is coated on one deck magnetic coating layer 21 in lead body 20 outsides and is coated on magnetic coating layer 21 outside.Therefore in this form, the magnetic conduction line comprises magnetic coating layer 21 and coatings layer 22.
Please referring to shown in Figure 3, it has shown the 3rd form of the present invention, in this form, one deck second insulating coating 33 that this magnetic conduction line comprises lead body 30 made of copper, is coated on one deck first coatings layer 31 in lead body 30 outsides, is coated on one deck magnetic coating layer 32 in the first coatings layer, 31 outside and is coated on magnetic coating layer 32 outside.Therefore in this form, this magnetic conduction line comprises two layers of coatings layer 31 and 33, and magnetic coating layer 32.
Please referring to shown in Figure 4, it has shown the 4th form of the present invention, in this form, this magnetic conduction line comprises lead body 40 made of copper, be coated on one deck first magnetic coating layer 41 in lead body 40 outsides, be coated on the first magnetic coating layer, 41 outside one deck first coatings layer 42, be coated on the first coatings layer, 42 outside one deck second magnetic coating layer 43, be coated on one deck second coatings layer 44 in the second magnetic coating layer, 43 outside.Therefore in this form, this magnetic conduction line comprises two layers of magnetic coating layer 41 and 43 and two layers of coatings layer 42 and 44.
Please referring to shown in Figure 5, it has shown the 5th form of the present invention, in this form, this magnetic conduction line comprises lead body 50 made of copper, be coated on one deck first coatings layer 51 in lead body 50 outsides, be coated on the first coatings layer, 51 outside one deck first magnetic coating layer 52, be coated on the first magnetic coating layer, 52 outside one deck second insulating coating 53, be coated on the second coatings layer, 53 outside one deck second magnetic coating layer 54, be coated on one deck the 3rd insulating coating 55 in the second magnetic coating layer, 54 outside.Therefore in this form, this magnetic conduction line comprises three-layer insulated dope layer 51,53 and 55, and two layers of magnetic coating layer 52 and 54.
By above-mentioned various forms as can be known, magnetic conduction line of the present invention outside lead body, can be coated with one deck or two-layer more than coatings layer and magnetic coating layer, and when the magnetic coating layer is two-layer when above, these magnetic coating layers can be the same magnetic material or different magnetic material is formed, and be separated with a coatings layer between between any two-layer magnetic coating layer, utilize the eye mould coating coatings in different apertures, control the thickness of this coatings layer, can adjust standoff distance between any two-layer magnetic coating layer, thereby control magnetic coating layer is for the reduction effect of magnetic conduction line AC resistance under the high frequency.
Embodiment:
Materials used and description of equipment:
1. Polyurethane coating: east association Chemical Manufacture, model PU-130-45, viscosity in 30 ℃ be 0.5 handkerchief second (Pas), solid content 45%.
2. γ-Fe2O3: Japanese Titan Kogyo company produces model γ-MRD, axial length 0.5 μ m, axial ratio 7.
3. oleic acid: day island proper company of a specified duration produces CAS No.112-80-1, concentration 98%.
4. inductance, electric capacity, resistance measure instrument (LCR Meter): U.S. Agilent company (Agilent) makes, model E4980A, test frequency scope 20Hz to 2MHz.
Comparative example 1:
To not add the Polyurethane coating of magnetic material, make the line sample on the 0.31mm copper material of the online footpath of single coating, the coating condition is as follows:
Coating method: eye mould
Be coated with back number: 12 times
Linear speed: the 60-70 meter/minute
Toast furnace temperature: 440-500 ℃
Its enamelled wire finished product characteristic is as shown in table 1.
Embodiment 1:
20 parts of γ-Fe2O3 is added in 100 parts of Polyurethane coating, made magnetic coating in mixing 24 hours with ball mill, make the line sample according to following condition single coating on the 0.31mm copper material of line footpath, its finished product characteristic is as shown in table 1.
Coating method: eye mould
Be coated with back number: alternately be coated with magnetic coating 5 times and Polyurethane coating 5 times (as shown in Figure 2)
Linear speed: the 60-70 meter/minute
Toast furnace temperature: 440-500 ℃
Embodiment 2:
After 20 parts of γ-Fe2O3 are carried out surfaction with 5 parts of oleic acid, together add 100 parts of Polyurethane coating, made magnetic coating in mixing 24 hours with ball mill, make the line sample according to embodiment 1 condition single coating on the 0.31mm copper material of line footpath, its finished product characteristic is as shown in table 1.
Embodiment 3:
15 parts of γ-Fe2O3 is added in 100 parts of Polyurethane coating, made magnetic coating in mixing 24 hours with ball mill, make the line sample according to embodiment 1 condition single coating on the 0.31mm copper material of line footpath, its finished product characteristic is as shown in table 1.
The performance test of table 1 comparative example and each embodiment
| Performance test * 1 | Comparative example 1 | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Outward appearance | Very | Very | Very | Very |
| Adherence | Very | Very | Very | Very |
| Reelability | Very | Very | Very | Very |
| Percentage elongation (%) | 30.6 | 30.9 | 32.8 | 34.0 |
| Unidirectional wear-resisting | 1480 | 1419 | 1187 | 1196 |
| Heat shock resistance | Very | Very | Very | Very |
| Anti-softening temperature (℃) | 251 | 246 | 238 | 222 |
| Straight weldering property | Very | Very | Very | Very |
| Insulation breakdown voltage (kV) | 9.42 | 8.43 | 8.60 | 8.97 |
| Conductor resistance (Ω/km) | 232.9 | 228.4 | 227.5 | 228.5 |
| 200kHz AC resistance (Ω) * 2 | 1.65 | 1.53 | 1.60 | 1.56 |
| AC resistance reduced rate (%) * 3 | - | 7.3 | 3.0 | 5.5 |
* 1 every performance test is to assess according to NEMA MW-75C standard.
* 2 get length 110cm enamelled wire, closely be wound on trunk footpath 8.0mm, edge on the inductance coil holder of 7.0mm, constitute the inductance coil of 34 circles of reeling, load onto the Ferrite iron core of model RM7, measure instrument (LCR Meter) in the alternating current resistance that measures under the voltage 1V pattern under its 200kHz frequency with inductance, electric capacity, resistance.
* the 200kHz alternating current resistance * 100% of 3 computing formula=(the 200kHz alternating current resistance of the 200kHz alternating current resistance-embodiment of comparative example 1)/comparative example 1.
Embodiments of the invention 1 to 3, all have to have and compare the lower AC resistance of comparative example 1, especially the AC resistance reduced rate that can provide with 1 of embodiment is the highest, therefore can prove that the present invention can break through restriction in the past, and reaches the purpose that reduces AC resistance really.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification that scope of the present invention is by claims and be equal to and limit to these embodiment.
Claims (11)
1. a magnetic conduction line comprises lead body and is coated on outside the described lead body and at least one magnetic coating layer of setting interlaced with each other and at least one coatings layer that the magnetic material in the described magnetic coating layer is non-conductive.
2. magnetic conduction line as claimed in claim 1, wherein each magnetic coating layer comprises coatings and is the magnetic material of 30～50wt% with respect to the solid content of described coatings.
3. magnetic conduction line as claimed in claim 2, wherein each magnetic coating layer is by the magnetic material and even mixing formation of coatings that pass through after interfacial agent carries out surfaction, and wherein interfacial agent is organosilan or oleic acid.
4. as each described magnetic conduction line among the claim 1-3, wherein said magnetic material is selected from the group that is made up of ferrimagnet and ferrimagnetic material.
5. it is that Ferrite, magnesium zinc are that Ferrite, barium are that Ferrite and strontium are the group that Ferrite is formed that magnetic conduction line as claimed in claim 4, wherein said magnetic material are selected from by γ-Fe2O3, Fe3O4, Ni-Zn series Ferrite, MnZn.
6. as each described magnetic conduction line among the claim 1-3, the average grain diameter of wherein said magnetic material is not more than 3 μ m.
7. as each described magnetic conduction line among the claim 1-3, wherein said coatings layer is selected from the group that is made up of following material: mylar, polyurethane resin, polyurethane resin, imide amic ester resin and polyester imine resin.
8. as each described magnetic conduction line among the claim 1-3, wherein said lead body is selected from the group that is made up of round bare copper wire, flat type bare copper wire, copper-clad aluminum conductor, aluminum steel, tinned wird and albronze metal wire.
9. electronic equipment, comprise as each described magnetic conduction line among the claim 1-8, described electronic equipment is high-frequency electronic coil, high-frequency inductor, high frequency transformer or power supply unit, and the frequency that described electronic equipment uses arrives between the 500k hertz (Hz) at 10k.
10. the manufacture method of a magnetic conduction line may further comprise the steps:
Conductor is provided; And
Be coated with in the quick mode of many times high temperature moment oven dry at described conductive surface and add at least one magnetic coating layer and at least one coatings layer, each magnetic coating layer comprises coatings and is the magnetic material of 30～50wt% with respect to the solid content of described coatings.
11. the manufacture method of an enamelled wire will be as each described magnetic conduction line among the claim 1-8 by magnetizing equipment, with magnetic material magnetization in the magnetic coating layer, to promote the reduction effect of enamelled wire AC resistance under the high frequency.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010100012227A CN102122538A (en) | 2010-01-08 | 2010-01-08 | Magnetic conductive wire as well as electronic equipment and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010100012227A CN102122538A (en) | 2010-01-08 | 2010-01-08 | Magnetic conductive wire as well as electronic equipment and manufacturing method thereof |
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| CN102122538A true CN102122538A (en) | 2011-07-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103413603A (en) * | 2013-07-12 | 2013-11-27 | 深圳市九洲蓉胜科技有限公司 | High-definition multimedia interface (HDMI) wire and preparation device thereof |
| CN105163246A (en) * | 2015-08-12 | 2015-12-16 | 歌尔声学股份有限公司 | Voice coil wire, voice coil made of voice coil wire, loudspeaker and vibration motor |
| CN107895640A (en) * | 2017-10-23 | 2018-04-10 | 华北电力大学 | A kind of method for reducing high frequency transformer winding loss |
| CN107937735A (en) * | 2017-12-29 | 2018-04-20 | 山西大学 | A kind of efficient magnesium reduction jar of electromagnetic induction heating |
| CN110189869A (en) * | 2019-06-10 | 2019-08-30 | 江苏南瑞恒驰电气装备有限公司 | A method of inhibit GIS bus and GIL equipment electric power to damage using high permeability material coated conductor |
| CN111462943A (en) * | 2020-05-19 | 2020-07-28 | 杭州存宝科技有限公司 | Wireless charging coil enameled wire with magnetic nano ferrite material inner layer and preparation method thereof |
| CN113272462A (en) * | 2019-01-17 | 2021-08-17 | 住友电工运泰克株式会社 | Conductor softening device and conductor softening method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103413603A (en) * | 2013-07-12 | 2013-11-27 | 深圳市九洲蓉胜科技有限公司 | High-definition multimedia interface (HDMI) wire and preparation device thereof |
| CN103413603B (en) * | 2013-07-12 | 2016-06-15 | 深圳市九洲蓉胜科技有限公司 | A kind of HDMI electric wire and preparation facilities thereof |
| CN105163246A (en) * | 2015-08-12 | 2015-12-16 | 歌尔声学股份有限公司 | Voice coil wire, voice coil made of voice coil wire, loudspeaker and vibration motor |
| CN107895640A (en) * | 2017-10-23 | 2018-04-10 | 华北电力大学 | A kind of method for reducing high frequency transformer winding loss |
| CN107937735A (en) * | 2017-12-29 | 2018-04-20 | 山西大学 | A kind of efficient magnesium reduction jar of electromagnetic induction heating |
| CN113272462A (en) * | 2019-01-17 | 2021-08-17 | 住友电工运泰克株式会社 | Conductor softening device and conductor softening method |
| CN110189869A (en) * | 2019-06-10 | 2019-08-30 | 江苏南瑞恒驰电气装备有限公司 | A method of inhibit GIS bus and GIL equipment electric power to damage using high permeability material coated conductor |
| CN111462943A (en) * | 2020-05-19 | 2020-07-28 | 杭州存宝科技有限公司 | Wireless charging coil enameled wire with magnetic nano ferrite material inner layer and preparation method thereof |
| CN114171293A (en) * | 2020-09-10 | 2022-03-11 | 北京小米移动软件有限公司 | Coil assembly and terminal |
| CN114171293B (en) * | 2020-09-10 | 2024-04-23 | 北京小米移动软件有限公司 | Coil assembly and terminal |
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Application publication date: 20110713 |