CN106847468A - A kind of magnetic shielding inductor high and its manufacture method for applying molybdenum perm magnetic core - Google Patents

A kind of magnetic shielding inductor high and its manufacture method for applying molybdenum perm magnetic core Download PDF

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Publication number
CN106847468A
CN106847468A CN201710031089.1A CN201710031089A CN106847468A CN 106847468 A CN106847468 A CN 106847468A CN 201710031089 A CN201710031089 A CN 201710031089A CN 106847468 A CN106847468 A CN 106847468A
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magnetic core
inductor
molybdenum perm
molybdenum
perm
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何琳
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Ningbo Huazhong And Industrial Design Co Ltd
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Ningbo Huazhong And Industrial Design Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/022—Encapsulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/22—Cooling by heat conduction through solid or powdered fillings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/25—Magnetic cores made from strips or ribbons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/266—Fastening or mounting the core on casing or support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

The invention discloses a kind of magnetic shielding inductor high and its manufacture method for applying molybdenum perm magnetic core, operating temperature, electromagnetic shielding are at least T grades when the magnetic shielding inductor high for applying molybdenum perm magnetic core can at least bear to be not less than 150 DEG C long；Stability molybdenum perm magnetic core high is obtained by the multiple circular treatment for controlling shaping, fixation and the impact destressing of molybdenum perm magnetic core to deform school shape destressing, heat-conducting insulation material is filled further through using the excellent aluminum-nitride-based ceramic skeleton of electromagnetic performance, fully closed aluminium alloy radome, in aluminium alloy radome, the heat resistance and shielding properties of inductor of the invention is improved；The magnetic shielding inductor high temperature resistance high for applying molybdenum perm magnetic core of the invention, effectiveness are good, long service life.

Description

A kind of magnetic shielding inductor high and its manufacture method for applying molybdenum perm magnetic core
Technical field
The present invention relates to field of electrical components, more particularly to a kind of magnetic shielding inductor high for applying molybdenum perm magnetic core and Its manufacture method.
Background technology
Inductor (Inductor) is the element that electric energy can be converted into magnetic energy and be stored.The structure class of inductor It is similar to transformer, but only one of which winding (6).Inductor has certain inductance, and it only hinders the change of electric current.If inductance In the state of no electric current passes through, it will attempt to hinder electric current to flow through it device when circuit is connected；If inductor is having electric current In the state of, it will attempt to maintain electric current constant when circuit disconnects.Inductor is also known as choke, reactor, dynamic reactance Device.
Molybdenum perm material has permeability very high, saturation induction density and relatively low coercivity and resistivity, mainly For small-sized, the highly sensitive transformer, amplifier, relay, choke coil, magnetic recording head, the magnetic screen that are used in low-intensity magnetic field Deng being one of best core material of stability.
In the Patents applied at home, patent《Shielding type inductor》(application number：201410132078.9, it is public Open day：2014-07-16), a kind of structure of shielding type inductor is disclosed, but it is not processed and is improved to material essence, Therefore its stability and screening ability is basic poor, and the other materials and structure for using are material commonly used in the art and tie Structure, for inductor, its service life is shorter；Patent《High current magnetic shielding inductor》(application number： 201110138303.6, publication date：2012-01-04), a kind of magnetic cup of the energy normal work under high current magnetic influence is disclosed Cover inductor, but its high magnetic flux density for using, the core material of high permeability are illustrated, and are demonstrate,proved according to available data Real, it is exactly molybdenum perm class magnetic core and ultra micro crystal class magnetic core to have highest magnetic flux density, the core material of highest permeability at present, because The scattered magnetic of this invention is mutually inevitable for the purpose of the present invention bigger, because being mixed with for embedding magnetic masking layer use described in the invention is led The epoxy resin of magnetic material, its Magnetic Shielding Effectiveness is less than silicon rubber of the invention and mixture of glass fibers, and poor thermal conductivity, temperature Degree stability is poor.
The content of the invention
The present invention is intended to provide high temperature resistance, effectiveness be good, the long service life height for applying molybdenum perm magnetic core Magnetic shielding inductor and its manufacture method.
To achieve these goals, the present invention uses following technical scheme：A kind of magnetic cup high for applying molybdenum perm magnetic core The manufacture method of inductor is covered, is comprised the following steps：
1) selection and preparation of each part
1. skeleton selects the aluminum-nitride-based ceramic skeleton matched with square shape magnetic core, the selection standard of the aluminum-nitride-based ceramics For：Specific insulation >=2 × 1013Ω cm, dielectric strength >=750kV/cm, thermal conductivity >=25W/mK, bending strength >= 400Mpa, young's modulus >=320Gpa, fracture toughness >=25Mpa；；
2. from molybdenum perm band, the selection standard of the molybdenum perm band is magnetic core：Its raw material 3.2%- containing molybdenum 3.8%th, iron content 15.8%-17.2%, nickeliferous 79%-81%, it is inclined that its inductance stabilization numerical value is not higher than 0.03%, initial inductance Move range values and be not higher than 0.3%；
3. radome is made of aluminium alloy, using full-closed structure；
4. encapsulating material uses epoxy resin；
5. winding uses the copper cash of standard winding tape insulation paint；
6. heat-conducting insulation material is using silicon rubber and glass fibre 9: 1 granular mixtures for mixing by weight；
2) working process of magnetic core
1. molybdenum perm raw material are positioned over and are assembled with the stamping machine of square shape drift, in endless metal stamping mold, Die mould is impacted by standard method, multiple molybdenum perm matrix bands are obtained；
2. step 1. after the completion of, the molybdenum perm matrix band that 1. step is obtained is put into vacuum drying oven, in the vacuum of 1pa-10pa Pre-anneal treatment is carried out in environment, at a temperature of 950 DEG C -1000 DEG C, is gone out after cooling to 550 DEG C -580 DEG C after the completion of annealing with the furnace Stove, obtains deformation molybdenum perm matrix band；
3. after the deformation molybdenum perm matrix band laminated multi-layer for 2. step being obtained, it is placed in shape-setting clamp that to carry out physics strong Formulation type, obtains sizing molybdenum perm magnetic core；
4. the sizing molybdenum perm magnetic core for 3. step being obtained is put into vacuum drying oven, in the vacuum environment of 1pa-10pa, 950 Whole annealing is carried out at a temperature of DEG C -1000 DEG C, is come out of the stove after cooling to 550 DEG C -580 DEG C after the completion of annealing with the furnace, acquisition is gone should Power molybdenum perm magnetic core；
5. 3.~4. operation is repeated, until the destressing molybdenum perm magnetic core obtained after removal high temperature resistant shape-setting clamp is still Size requirement can be met, that is, obtain stand-by molybdenum perm magnetic core；
6. the stand-by molybdenum perm magnetic core for 5. being obtained to step using epoxy resin is bonded and encapsulated, that is, molybdenum needed for obtaining Perm magnetic core
3) processing of inductor and assembling
1. molybdenum perm magnetic core is positioned in aluminum-nitride-based ceramic skeleton, is fixed using epoxy resin；
2. the copper cash of tape insulation paint is wrapped on aluminum-nitride-based ceramic skeleton by standard canoe, and uses asphalt mixtures modified by epoxy resin Fat is encapsulated；
3. whole common mode inductance encapsulate using aluminium alloy radome, step is 6. accurate during 1) filling expires in the gap during encapsulation Standby graininess heat-conducting insulation material；Then sealed using epoxy resin, that is, obtained inductor；
4) stabilization processes of inductor
1. the pending inductor that step in 3) is 3. obtained is positioned in household freezer, temperature is not higher than -70 DEG C, insulation 20min-30min, obtains cold treatment inductor；
2. step 1. after the completion of, the cold treatment inductor that 1. step is obtained is placed at room temperature, and room is returned back to its temperature Temperature is then placed in baking oven, and 100 DEG C -105 DEG C are risen to the heating rate for being not higher than 2 DEG C/min, is incubated 25min-30min, is obtained Obtain thermal cycle inductor；
3. the thermal cycle inductor for 2. step being obtained is placed at room temperature, and room temperature is returned back to its temperature；
4. be repeated 1.~3. operation twice, that is, the magnetic shielding inductor high of molybdenum perm magnetic core is applied needed for obtaining.
A kind of magnetic shielding inductor high for applying molybdenum perm magnetic core manufactured according to above-mentioned manufacture method, including skeleton, Winding, magnetic core, radome, encapsulating material；Employ aluminium nitride ceramics skeleton；Winding employs 1140 epoxy polyester insulated paint of band Carbon fiber line；Radome employs aluminium alloy making, full-closed structure encapsulation；In radome and other parts in addition to radome Gap in, filled with graininess heat-conducting insulation material, the heat-conducting insulation material be using silicon rubber and glass fibre by weight Than the granular mixture of 9: 1 mixing.
Operating temperature, electricity when the magnetic shielding inductor high for applying molybdenum perm magnetic core can bear to be not less than 150 DEG C long Magnetic screen rank is at least T grades.
Compared with prior art, the present invention has advantages below：The good molybdenum permalloy of stability has been selected, and it is right Molybdenum permalloy impact the multiple circular treatment of-destressing-deformation-school shape-destressing, and destressing temperature is high In Curie temperature, therefore the final molybdenum perm magnetic core size good stability for obtaining, remaining mixed and disorderly magnetic flux are small, temperature influence Small, high temperature resistant；Because molybdenum perm material has permeability very high, saturation induction density and relatively low coercivity and resistance Rate, therefore electromagnetic performance of the invention is excellent；Due to the molybdenum perm material of present invention use, its inductance stabilization numerical value is not high again 0.3% (numerical value is more low more stable) is not higher than in 0.03% (numerical value is more low more stable), initial inductance deviation range numerical value so that Basal temperature stability of the invention is just fine, because insensitive to temperature change；Because skeleton is made of aluminum-nitride-based ceramics, Comprehensive organ's function admirable of the aluminum-nitride-based ceramics, and thermal coefficient of expansion is low, it is more difficult to aging, rotten, closed using aluminium in addition Golden full-closed structure, it is small by extraneous infringement using common mode inductance of the invention, therefore long service life；Closed due to using aluminium Golden full-closed structure, but because the insulating materials filled covers whole inductor, therefore electromagnetic wave shielding is good, while using this Invention impression is extraneous to encroach on small, long service life；Again due to being filled with high heat conductive insulating between the aluminum_alloy cover and heating part Material, therefore the inductor excellent radiation performance.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
In figure：Radome 1, ceramic skeleton 2, magnetic core 3, winding 4, heat-conducting insulation material 5.
Specific embodiment
Embodiment 1：
A kind of magnetic shielding inductor high for applying molybdenum perm magnetic core, including skeleton, winding 4, magnetic core 3, radome 1, envelope Package material；Employ aluminium nitride ceramics skeleton 2；Winding 4 employs the carbon fiber line with 1140 epoxy polyester insulated paint；Radome 1 employs aluminium alloy making, full-closed structure encapsulation；In radome 1 with the gap of other parts in addition to radome 1, filling There is graininess heat-conducting insulation material 5, the heat-conducting insulation material 5 is to mix by weight 9: 1 with glass fibre using silicon rubber Granular mixture.
The manufacture method of the above-mentioned magnetic shielding inductor high for applying molybdenum perm magnetic core, comprises the following steps：
1) selection and preparation of each part
1. skeleton selects the aluminum-nitride-based ceramic skeleton 2 matched with square shape magnetic core 3, the selection of the aluminum-nitride-based ceramics Standard is：Specific insulation >=2 × 1013Ω cm, dielectric strength >=750kV/cm, thermal conductivity >=25W/mK, bending strength >=400Mpa, young's modulus >=320Gpa, fracture toughness >=25Mpa；；
2. from molybdenum perm band, the selection standard of the molybdenum perm band is magnetic core 3：Its raw material 3.2%- containing molybdenum 3.8%th, iron content 15.8%-17.2%, nickeliferous 79%-81%, it is inclined that its inductance stabilization numerical value is not higher than 0.03%, initial inductance Move range values and be not higher than 0.3%；
3. radome 1 is made of aluminium alloy, using full-closed structure；
4. encapsulating material uses epoxy resin；
5. winding 4 uses the copper cash of the tape insulation paint of standard winding 4；
6. heat-conducting insulation material 5 is using silicon rubber and glass fibre 9: 1 granular mixtures for mixing by weight；
2) working process of magnetic core 3
1. molybdenum perm raw material are positioned over and are assembled with the stamping machine of square shape drift, in endless metal stamping mold, Die mould is impacted by standard method, multiple molybdenum perm matrix bands are obtained；
2. step 1. after the completion of, the molybdenum perm matrix band that 1. step is obtained is put into vacuum drying oven, in the vacuum environment of 10pa In, carry out pre-anneal treatment at a temperature of 1000 DEG C, come out of the stove after cooling to 580 DEG C after the completion of annealing with the furnace, obtain deformation molybdenum perm Matrix band；
3. after the deformation molybdenum perm matrix band laminated multi-layer for 2. step being obtained, it is placed in shape-setting clamp that to carry out physics strong Formulation type, obtains sizing molybdenum perm magnetic core 3；
4. the sizing molybdenum perm magnetic core 3 for 3. step being obtained is put into vacuum drying oven, in the vacuum environment of 10pa, 950 DEG C of temperature Whole annealing is carried out under degree, is come out of the stove after cooling to 550 DEG C after the completion of annealing with the furnace, obtain destressing molybdenum perm magnetic core 3；
5. 3.~4. operation is repeated, until the destressing molybdenum perm magnetic core 3 obtained after removal high temperature resistant shape-setting clamp Remain to meet size requirement, that is, obtain stand-by molybdenum perm magnetic core 3；
6. the stand-by molybdenum perm magnetic core 3 for 5. being obtained to step using epoxy resin is bonded and encapsulated, that is, needed for obtaining Molybdenum perm magnetic core 3
3) processing of inductor and assembling
1. molybdenum perm magnetic core 3 is positioned in aluminum-nitride-based ceramic skeleton 2, is fixed using epoxy resin；
2. the copper cash of tape insulation paint is wrapped on aluminum-nitride-based ceramic skeleton 2 by standard canoe, and uses epoxy Resin-encapsulated；
3. using aluminium alloy radome 1 by the encapsulation of whole common mode inductance, during filling is full 1) in the gap during encapsulation, step is 6. The graininess heat-conducting insulation material 5 of preparation；Then sealed using epoxy resin, that is, obtained inductor；
4) stabilization processes of inductor
1. the pending inductor that step in 3) is 3. obtained is positioned in household freezer, -70 DEG C of temperature, is incubated 20min, obtained Obtain cold treatment inductor；
2. step 1. after the completion of, the cold treatment inductor that 1. step is obtained is placed at room temperature, and room is returned back to its temperature Temperature, is then placed in baking oven, and 100 DEG C are risen to the heating rate of 2 DEG C/min, is incubated 25min, obtains thermal cycle inductor；
3. the thermal cycle inductor for 2. step being obtained is placed at room temperature, and room temperature is returned back to its temperature；
4. be repeated 1.~3. operation twice, that is, the magnetic shielding inductor high of molybdenum perm magnetic core is applied needed for obtaining.
According to the magnetic shielding inductor sample high for applying molybdenum perm magnetic core that the present embodiment is produced, 160 DEG C can be born Operating temperature when long, electromagnetic shielding rank is T grades.
Embodiment 2：
A kind of manufacture method of the magnetic shielding inductor high for applying molybdenum perm magnetic core, comprises the following steps：
1) selection and preparation of each part
1. skeleton selects the aluminum-nitride-based ceramic skeleton 2 matched with square shape magnetic core 3, the selection of the aluminum-nitride-based ceramics Standard is：Specific insulation >=2 × 1013Ω cm, dielectric strength >=750kV/cm, thermal conductivity >=25W/mK, bending strength >=400Mpa, young's modulus >=320Gpa, fracture toughness >=25Mpa；；
2. from molybdenum perm band, the selection standard of the molybdenum perm band is magnetic core 3：Its raw material 3.2%- containing molybdenum 3.8%th, iron content 15.8%-17.2%, nickeliferous 79%-81%, it is inclined that its inductance stabilization numerical value is not higher than 0.03%, initial inductance Move range values and be not higher than 0.3%；
3. radome 1 is made of aluminium alloy, using full-closed structure；
4. encapsulating material uses epoxy resin；
5. winding 4 uses the copper cash of the tape insulation paint of standard winding 4；
6. heat-conducting insulation material 5 is using silicon rubber and glass fibre 9: 1 granular mixtures for mixing by weight；
2) working process of magnetic core 3
1. molybdenum perm raw material are positioned over and are assembled with the stamping machine of square shape drift, in endless metal stamping mold, Die mould is impacted by standard method, multiple molybdenum perm matrix bands are obtained；
2. step 1. after the completion of, the molybdenum perm matrix band that 1. step is obtained is put into vacuum drying oven, in the vacuum environment of 1pa In, carry out pre-anneal treatment at a temperature of 1000 DEG C, come out of the stove after cooling to 580 DEG C after the completion of annealing with the furnace, obtain deformation molybdenum perm Matrix band；
3. after the deformation molybdenum perm matrix band laminated multi-layer for 2. step being obtained, it is placed in shape-setting clamp that to carry out physics strong Formulation type, obtains sizing molybdenum perm magnetic core 3；
4. the sizing molybdenum perm magnetic core 3 for 3. step being obtained is put into vacuum drying oven, in the vacuum environment of 1pa, 1000 DEG C of temperature Whole annealing is carried out under degree, is come out of the stove after cooling to 580 DEG C after the completion of annealing with the furnace, obtain destressing molybdenum perm magnetic core 3；
5. 3.~4. operation is repeated, until the destressing molybdenum perm magnetic core 3 obtained after removal high temperature resistant shape-setting clamp Remain to meet size requirement, that is, obtain stand-by molybdenum perm magnetic core 3；
6. the stand-by molybdenum perm magnetic core 3 for 5. being obtained to step using epoxy resin is bonded and encapsulated, that is, needed for obtaining Molybdenum perm magnetic core 3
3) processing of inductor and assembling
1. molybdenum perm magnetic core 3 is positioned in aluminum-nitride-based ceramic skeleton 2, is fixed using epoxy resin；
2. the copper cash of tape insulation paint is wrapped on aluminum-nitride-based ceramic skeleton 2 by standard canoe, and uses epoxy Resin-encapsulated；
3. using aluminium alloy radome 1 by the encapsulation of whole common mode inductance, during filling is full 1) in the gap during encapsulation, step is 6. The graininess heat-conducting insulation material 5 of preparation；Then sealed using epoxy resin, that is, obtained inductor；
4) stabilization processes of inductor
1. the pending inductor that step in 3) is 3. obtained is positioned in household freezer, -80 DEG C of temperature, is incubated 30min, obtained Obtain cold treatment inductor；
2. step 1. after the completion of, the cold treatment inductor that 1. step is obtained is placed at room temperature, and room is returned back to its temperature Temperature, is then placed in baking oven, and 105 DEG C are risen to the heating rate of 1.5 DEG C/min, is incubated 30min, obtains thermal cycle inductor；
3. the thermal cycle inductor for 2. step being obtained is placed at room temperature, and room temperature is returned back to its temperature；
4. be repeated 1.~3. operation twice, that is, the magnetic shielding inductor high of molybdenum perm magnetic core is applied needed for obtaining.
What a kind of manufacture method of above-mentioned magnetic shielding inductor high for applying molybdenum perm magnetic core was manufactured applies molybdenum perm The magnetic shielding inductor high of magnetic core, including skeleton, winding 4, magnetic core 3, radome 1, encapsulating material；Employ aluminium nitride ceramics bone Frame 2；Winding 4 employs the carbon fiber line with 1140 epoxy polyester insulated paint；Radome 1 employs aluminium alloy making, totally-enclosed Construction packages；In radome 1 with the gap of other parts in addition to radome 1, filled with graininess heat-conducting insulation material 5, should Heat-conducting insulation material 5 is by weight 9: 1 granular mixtures for mixing using silicon rubber with glass fibre.
According to the magnetic shielding inductor sample high for applying molybdenum perm magnetic core that the present embodiment is produced, 180 DEG C can be born Operating temperature when long, electromagnetic shielding rank is T grades.
The foregoing description of the disclosed embodiments, only for enabling professional and technical personnel in the field to realize or using this Invention.Various modifications to these embodiments will be apparent for those skilled in the art, institute herein The General Principle of definition can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, The present invention is not intended to be limited to the embodiments shown herein, and is to fit to special with principles disclosed herein and novelty The consistent scope most wide of point.

Claims (2)

1. a kind of manufacture method of the magnetic shielding inductor high for applying molybdenum perm magnetic core, it is characterised in that comprise the following steps：
1) selection and preparation of each part
1. skeleton selects the aluminum-nitride-based ceramic skeleton (2) matched with square shape magnetic core (3)；
2. magnetic core (3) select molybdenum perm band, molybdenum perm raw material 3.2%-3.8% containing molybdenum, iron content 15.8%-17.2%, Nickeliferous 79%-81%；
3. radome (1) is made of aluminium alloy, using full-closed structure；
4. encapsulating material uses epoxy resin；
5. winding (4) uses the copper cash of standard winding (4) tape insulation paint；
6. heat-conducting insulation material (5) is using silicon rubber and glass fibre 9: 1 granular mixtures for mixing by weight；
2) working process of magnetic core (3)
1. molybdenum perm raw material are positioned over and are assembled with the stamping machine of square shape drift, in endless metal stamping mold, by mark Quasi- method impacts die mould, obtains multiple molybdenum perm matrix bands；
2. step 1. after the completion of, the molybdenum perm matrix band that 1. step is obtained is put into vacuum drying oven, in the vacuum environment of 1pa-10pa In, carry out pre-anneal treatment at a temperature of 950 DEG C -1000 DEG C, come out of the stove after cooling to 550 DEG C -580 DEG C after the completion of annealing with the furnace, obtain Molybdenum perm matrix band must be deformed；
3. after the deformation molybdenum perm matrix band laminated multi-layer for 2. step being obtained, being placed in shape-setting clamp carries out physical constraints and determines Type, obtains sizing molybdenum perm magnetic core (3)；
4. sizing molybdenum perm magnetic core (3) for 3. step being obtained is put into vacuum drying oven, in the vacuum environment of 1pa-10pa, 950 DEG C- Whole annealing is carried out at a temperature of 1000 DEG C, is come out of the stove after cooling to 550 DEG C -580 DEG C after the completion of annealing with the furnace, obtain destressing molybdenum Perm magnetic core (3)；
5. 3.~4. operation is repeated, until destressing molybdenum perm magnetic core (3) obtained after removal high temperature resistant shape-setting clamp is still Size requirement can be met, that is, obtain stand-by molybdenum perm magnetic core (3)；
6. the stand-by molybdenum perm magnetic core (3) for 5. being obtained to step using epoxy resin is bonded and is encapsulated, that is, molybdenum needed for obtaining Perm magnetic core (3)
3) processing of inductor and assembling
1. molybdenum perm magnetic core (3) is positioned in aluminum-nitride-based ceramic skeleton (2), is fixed using epoxy resin；
2. the copper cash of tape insulation paint is wrapped on aluminum-nitride-based ceramic skeleton (2) by standard canoe, and uses asphalt mixtures modified by epoxy resin Fat is encapsulated；
3. whole common mode inductance is encapsulated using aluminium alloy radome (1), step is 6. accurate during filling is full 1) in the gap during encapsulation Standby graininess heat-conducting insulation material (5)；Then sealed using epoxy resin, that is, obtained inductor；
4) stabilization processes of inductor
1. the pending inductor that step in 3) is 3. obtained is positioned in household freezer, temperature is not higher than -70 DEG C, is incubated 20min- 30min, obtains cold treatment inductor；
2. step 1. after the completion of, the cold treatment inductor that 1. step is obtained is placed at room temperature, and it is right to return back to room temperature to its temperature After be put into baking oven, rise to 100 DEG C -105 DEG C with the heating rate for being not higher than 2 DEG C/min, be incubated 25min-30min, obtain heat Circulation inductor；
3. the thermal cycle inductor for 2. step being obtained is placed at room temperature, and room temperature is returned back to its temperature；
4. be repeated 1.~3. operation twice, that is, the magnetic shielding inductor high of molybdenum perm magnetic core is applied needed for obtaining.
2. a kind of magnetic shielding inductor high for applying molybdenum perm magnetic core of the manufacture of manufacture method according to claim 1, wraps Include skeleton, winding (4), magnetic core (3), radome (1), encapsulating material, it is characterised in that：Employ aluminium nitride ceramics skeleton (2)； Winding (4) employs the carbon fiber line with 1140 epoxy polyester insulated paint；Radome (1) employs aluminium alloy making, totally-enclosed Construction packages；In radome (1) with the gap of other parts in addition to radome (1), filled with graininess heat-conducting insulation material (5), the heat-conducting insulation material (5) is by weight 9: 1 granular mixtures for mixing using silicon rubber with glass fibre.
CN201710031089.1A 2017-01-17 2017-01-17 A kind of magnetic shielding inductor high and its manufacture method for applying molybdenum perm magnetic core Pending CN106847468A (en)

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CN109285683A (en) * 2018-10-29 2019-01-29 山东同方鲁颖电子有限公司 A kind of method of stable chip inductance performance

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