CN108305742A - A kind of totally enclosed inductor - Google Patents

A kind of totally enclosed inductor Download PDF

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Publication number
CN108305742A
CN108305742A CN201610547717.7A CN201610547717A CN108305742A CN 108305742 A CN108305742 A CN 108305742A CN 201610547717 A CN201610547717 A CN 201610547717A CN 108305742 A CN108305742 A CN 108305742A
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CN
China
Prior art keywords
inductor
drum
hole
magnetic core
core array
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610547717.7A
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Chinese (zh)
Inventor
王志刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hubei Ruiyuan Electronic Co Ltd
Original Assignee
Hubei Ruiyuan Electronic Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Hubei Ruiyuan Electronic Co Ltd filed Critical Hubei Ruiyuan Electronic Co Ltd
Priority to CN201610547717.7A priority Critical patent/CN108305742A/en
Publication of CN108305742A publication Critical patent/CN108305742A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with magnetic core
    • H01F17/045—Fixed inductances of the signal type  with magnetic core with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/02—Organic and inorganic ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/05—Alcohols; Metal alcoholates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D101/00—Coating compositions based on cellulose, modified cellulose, or cellulose derivatives
    • C09D101/08—Cellulose derivatives
    • C09D101/26—Cellulose ethers
    • C09D101/28—Alkyl ethers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • 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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

The invention discloses a kind of totally enclosed inductors, including inductor body, the inductor body includes metallic shield, magnetic core array and inductance coil, the metallic shield is made of drum, upper cover body and lower cover, there is upper through-hole wherein in upper cover body, there is lower through-hole, upper through-hole and lower through-hole are coaxial on lower cover；The upper cover body is set in drum, and positioned at the top of drum；Mixed special material is uniformly attached to inductor body surface by the surface of the inductor body using spraying technology.The setting of shading ring of the present invention keeps the anti-electromagnetic interference capability of inductor strong, and job stability is high；Since inductance coil uses the enamel covered wire coiling of multi cord, which can be with super-high-current, to substantially increase the practicability of the inductor；In addition, the surface of inductor body after processing, has excellent insulation and high-temperature stability, corrosion-resistant under the conditions of strong acid and salt fog, can effectively protect inductor.

Description

A kind of totally enclosed inductor
Technical field
The present invention relates to inductors technique field, specifically a kind of totally enclosed inductor.
Background technology
Inductor is also known as inductance coil, otherwise referred to as reactor or choke, is the member substantially for forming electronic circuit One of part is used among a series of extensive applications of such as signal processing, noise filtering, power generation, electrical transmission system etc. Existing inductor generally includes inductance coil, metallic shield and magnetic core, and inductance coil is wrapped in outside magnetic core, metallic shield Cover is coated on the outside of inductance coil, and two lead terminals of inductance coil stretch out outside metallic shield and external electrical connections.This Kind inductor has as a drawback that：1, since the metallic shield is that embedding is molding under non-vacuum, so gold can be caused The inside for belonging to shielding case can have a little bubble, its serious heat dissipation effect of bubble meeting causes heat dissipation performance to decline.2, inductor When being actually powered in circuit, magnetic field is will produce around magnetic substance, and will produce electricity between the electronic component of surrounding Magnetic disturbance, inductor generates electromagnetic interference to exterior electrical components, while the magnetic field that exterior electrical components generate is also to inductor Electromagnetic interference is caused, the poor work stability of the two is made.
In inductor manufacturing, an insoluble problem is generally faced for a long time, is exactly problem of rustiness, though Some right companies are handled inductor surface using surface cladding tech, but are existed and be not inconsistent with inductor body adhesive force The problem of conjunction, this may result in inductor and gets rusty when in use, influence the normal use of inductor.
Invention content
The purpose of the present invention is to provide a kind of totally enclosed inductors, to solve mentioned above in the background art ask Topic.
To achieve the above object, the present invention provides the following technical solutions：
A kind of totally enclosed inductor, including inductor body, the inductor body include metallic shield, magnetic core array And inductance coil, the metallic shield are made of drum, upper cover body and lower cover, have upper through-hole wherein in upper cover body, There is lower through-hole, upper through-hole and lower through-hole are coaxial on lower cover；The upper cover body is set in drum, and positioned at the upper of drum Portion, upper cover body and drum tight fit, lower cover are set in drum, and positioned at the lower part of drum, lower cover and drum Tight fit；Upper cover body, drum and lower cover form closed cavity；The magnetic core array is column construction, and magnetic core array setting exists In the cavity, and the upper end of magnetic core array and upper through-hole tight fit, lower end and the lower through-hole tight fit of magnetic core array；The inductance Coil is wrapped in the outside of magnetic core array, is co-located in the cavity with magnetic core array；The upper end of magnetic core array and upper through-hole it Between and the lower end and lower through-hole of magnetic core array between shading ring is respectively set；The inductance coil uses the enamel covered wire of multi cord Coiling, there are two exit, each exits to be cased with Teflon casing for tool, and one end of the Teflon casing extends to institute State the wicking root of the enamel covered wire of multi cord；The surface of the inductor body uses spraying technology by mixed extraordinary material Material is uniformly attached to inductor body surface, after then being handled by 120 DEG C -180 DEG C of high-temperature baking 20-40min, in inductance Device surface forms fine and close protective film；The special material includes accounting for silica, the 8- that total weight percent is 13-18% The ethylene glycol only son of 15% mica, the boron oxide of 3-10%, the calcium oxide of 1-4%, the ethyl cellulose of 10-20%, 2-7% The absolute ethyl alcohol of ether, the terpinol of 15-25% and 20-30% forms the outstanding of certain viscosity by grinding after above-mentioned material mixing Floating shape slurry.
As a further solution of the present invention：The milling time is 20-40 minutes.
As a further solution of the present invention：The viscosity is 1500-5000mps.
As a further solution of the present invention：Injection apparatus is used when the spraying technology sprays, in 0.1-0.6MPa Air is depressed, and ejects spray, uniform fold is on the surface of inductor body.
As a further solution of the present invention：The grain size of the mixed slurry of inductor body finish materials At 1-3 microns.
As a further solution of the present invention：The thickness of the inductor surface spraying slurry is at 1-10 microns.
As a further solution of the present invention：The length that the Teflon casing stretches into the enamel covered wire of multi cord is 5-10 Millimeter.
Compared with prior art, the setting of shading ring of the present invention keeps the anti-electromagnetic interference capability of inductor strong, the operation is stable Property it is high；Since inductance coil uses the enamel covered wire coiling of multi cord, the inductor can be with super-high-current, to carry significantly The high practicability of the inductor；In addition, the surface of inductor body after processing, have excellent insulation (1G Ω) and High temperature resistant (200 DEG C) characteristic, the corrosion resistant under strong acid (PH=3-5) and salt fog condition (5%wtNaCl solution is 35 DEG C in temperature) Erosion, can effectively protect inductor.
Description of the drawings
Fig. 1 is the signal exploded view of inductor structure of the present invention.
Fig. 2 is the sectional view after each component installation of inductor of the present invention.
Fig. 3 is the structural schematic diagram of drum.
Specific implementation mode
The technical solution of this patent is described in more detail With reference to embodiment.
Please refer to Fig.1-3, a kind of totally enclosed inductor, including inductor body, the inductor body include metal Shielding case, magnetic core array 20 and inductance coil 30, the metallic shield are made of drum 11, upper cover body 13 and lower cover 15, There is upper through-hole 13a wherein in upper cover body 13, have lower through-hole 15a, upper through-hole 13a and lower through-hole 15a coaxial on lower cover 15； Upper cover body 13 is set in drum 11, and positioned at the top of drum 11, upper cover body 13 and 11 tight fit of drum, lower cover 15 In drum 11, and positioned at the lower part of drum 11, lower cover 15 and 11 tight fit of drum；Upper cover body 13, drum 11 and lower cover 15 form closed cavity.Magnetic core array 20 is column construction, and magnetic core array 20 is arranged in the cavity, and magnetic core The upper end of body 20 and upper through-hole 13a tight fits, lower end and the lower through-hole 15a tight fits of magnetic core array 20.Inductance coil 30 is wrapped in The outside of magnetic core array 20 is co-located on magnetic core array 20 in institute's cavity；It is filled in the cavity and injects under vacuum conditions Casting glue；By being potted under vacuum conditions into cavity, can be filled to avoid the generation of bubble to substantially increase The heat conductivility of sealing, while being passed to heat in drum 11 using casting glue, then distributed heat by drum 11, So that entire inductor has good heat dissipation performance.Between the upper end of magnetic core array 20 and upper through-hole 13a and magnetic core array 20 Lower end and lower through-hole 15a between shading ring 40 is respectively set；Inductor generates magnetic field meeting when being powered on around magnetic substance Part is masked by shading ring, reduces the leakage field phenomenon of inductor, shading ring not only reduces the magnetic that inductor generates around it , it greatly reduces to being interfered caused by exterior electrical components, while decreasing the magnetic field of exterior electrical components generation To the electromagnetic interference phenomenon of inductor, keep the anti-electromagnetic interference capability of inductor strong, job stability is high.Inductance coil 30 uses The high current of inductor may be implemented in the enamel covered wire coiling of multi cord in this way, and there are two exit, each extractions for tool End cap has Teflon casing, one end of the Teflon casing to extend to the wicking root of the enamel covered wire of the multi cord；Iron fluorine Actor playing a supporting role's pipe has the function of high temperature resistant, high insulation, it, which is extended to wicking root, can ensure isolation of the inductor in complete machine.
Mixed special material is uniformly attached to inductor sheet by the surface of the inductor body using spraying technology Body surface face forms fine and close protection in inductor surface after then being handled by 120 DEG C -180 DEG C of high-temperature baking 20-40min Film；The special material includes accounting for the oxygen that total weight percent is the silica of 13-18%, the mica of 8-15%, 3-10% Change boron, the calcium oxide of 1-4%, the ethyl cellulose of 10-20%, the ethylene glycol monobutyl ether of 2-7%, 15-25% terpinol and The absolute ethyl alcohol of 20-30% forms the suspension slurry of certain viscosity by grinding after above-mentioned material mixing.
As of the invention further preferred：The milling time is 20-40 minutes.
As of the invention further preferred：The viscosity is 1500-5000mps.
As of the invention further preferred：Injection apparatus is used when the spraying technology sprays, in 0.1-0.6MPa Air is depressed, and ejects spray, uniform fold is on the surface of inductor body.
As of the invention further preferred：The grain size of the mixed slurry of inductor body finish materials At 1-3 microns.
As of the invention further preferred：The thickness of the inductor surface spraying slurry is at 1-10 microns.
As of the invention further preferred：The length that the Teflon casing stretches into the enamel covered wire of multi cord is 5-10 Millimeter, can effectively ensure that Teflon casing is not fallen off.
It, can also be from when it is implemented, two exits of inductance coil can be drawn from upper through-hole 13a, lower through-hole 15a The side wall of drum 11 is drawn.There is a plurality of radiating groove 11a, a plurality of radiating groove 11a is along bucket on the lateral wall of the drum 11 The axial setting of shape part 11, the setting of radiating groove 11a increase the heat dissipation area of 11 lateral wall of drum, and make heat distributes speed Faster.It is additionally provided with left installing rack 12, right installing rack 14 on the lateral wall of drum 11, left bayonet 12a is offered in left installing rack, Right bayonet 14a is offered in right installing rack；Left installing rack 12, right installing rack 14 and drum 11 are integral type cast aluminium forming.This The bonding strength between left installing rack 12, right installing rack 14 and drum 11 is not only increased, and also simplifies technique and peace Dress process.
The setting of shading ring of the present invention keeps the anti-electromagnetic interference capability of inductor strong, and job stability is high；Due to inductor wire Circle uses the enamel covered wire coiling of multi cord, therefore the inductor can be with super-high-current, to substantially increase the inductor Practicability；In addition, the surface of inductor body after processing, has excellent insulation (1G Ω) and high temperature resistant (200 DEG C) Characteristic, corrosion-resistant, the can effectively protect under strong acid (PH=3-5) and salt fog condition (5%wtNaCl solution is 35 DEG C in temperature) Inductor.
The better embodiment of this patent is explained in detail above, but this patent is not limited to above-mentioned embodiment party Formula, one skilled in the relevant art within the scope of knowledge, can also be under the premise of not departing from this patent objective It makes a variety of changes.

Claims (7)

1. a kind of totally enclosed inductor, which is characterized in that including inductor body, the inductor body includes metallic shield Cover, magnetic core array and inductance coil, the metallic shield are made of drum, upper cover body and lower cover, are wherein had in upper cover body There is upper through-hole, there is lower through-hole on lower cover, upper through-hole and lower through-hole are coaxial；The upper cover body is set in drum, and is located at The top of drum, upper cover body and drum tight fit, lower cover are set in drum, and positioned at the lower part of drum, lower cover Body and drum tight fit；Upper cover body, drum and lower cover form closed cavity；The magnetic core array is column construction, magnetic Core is arranged in the cavity, and the upper end of magnetic core array and upper through-hole tight fit, lower end and the lower through-hole tight fit of magnetic core array； The inductance coil is wrapped in the outside of magnetic core array, is co-located in the cavity with magnetic core array；The upper end of magnetic core array with Shading ring is respectively set between upper through-hole and between the lower end and lower through-hole of magnetic core array；The inductance coil is using multi cord Enamel covered wire coiling, for tool there are two exit, each exit is cased with Teflon casing, and the one of the Teflon casing End extends to the wicking root of the enamel covered wire of the multi cord；After the surface of the inductor body will be mixed using spraying technology Special material be uniformly attached to inductor body surface, then pass through 120 DEG C -180 DEG C of high-temperature baking 20-40min processing Afterwards, fine and close protective film is formed in inductor surface；The special material includes accounting for the dioxy that total weight percent is 13-18% The second of SiClx, the mica of 8-15%, the boron oxide of 3-10%, the calcium oxide of 1-4%, the ethyl cellulose of 10-20%, 2-7% The absolute ethyl alcohol of glycol monobutyl ether, the terpinol of 15-25% and 20-30% is formed certain by grinding after above-mentioned material mixing The suspension slurry of viscosity.
2. totally enclosed inductor according to claim 1, which is characterized in that the milling time is 20-40 minutes.
3. totally enclosed inductor according to claim 1, which is characterized in that the viscosity is 1500-5000mp s。
4. totally enclosed inductor according to claim 1, which is characterized in that using spray when the spraying technology sprays Injection device is depressed in 0.1-0.6MPa air, ejects spray, uniform fold is on the surface of inductor body.
5. totally enclosed inductor according to claim 1, which is characterized in that the inductor body is surface-treated material Expect the grain size of mixed slurry at 1-3 microns.
6. totally enclosed inductor according to claim 1, which is characterized in that the inductor surface spraying slurry Thickness is at 1-10 microns.
7. totally enclosed inductor according to claim 1, which is characterized in that the Teflon casing stretches into multi cord The length of enamel covered wire is 5-10 millimeters.
CN201610547717.7A 2016-07-13 2016-07-13 A kind of totally enclosed inductor Pending CN108305742A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610547717.7A CN108305742A (en) 2016-07-13 2016-07-13 A kind of totally enclosed inductor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610547717.7A CN108305742A (en) 2016-07-13 2016-07-13 A kind of totally enclosed inductor

Publications (1)

Publication Number Publication Date
CN108305742A true CN108305742A (en) 2018-07-20

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Country Status (1)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120216392A1 (en) * 2011-02-26 2012-08-30 Fan Tso-Ho Method for making a shielded inductor involving an injection-molding technique
US20120315792A1 (en) * 2011-06-07 2012-12-13 Tyco Electronics Corporation Magnetic device
CN203931710U (en) * 2014-04-28 2014-11-05 蕲春县蕊源电子有限公司 A kind of combined shielding inductance
CN205230743U (en) * 2015-12-24 2016-05-11 重庆益堡科技有限公司 Inductor
CN205230765U (en) * 2015-12-24 2016-05-11 重庆益堡科技有限公司 Can overcurrent and thermal diffusivity good inductor again

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120216392A1 (en) * 2011-02-26 2012-08-30 Fan Tso-Ho Method for making a shielded inductor involving an injection-molding technique
US20120315792A1 (en) * 2011-06-07 2012-12-13 Tyco Electronics Corporation Magnetic device
CN203931710U (en) * 2014-04-28 2014-11-05 蕲春县蕊源电子有限公司 A kind of combined shielding inductance
CN205230743U (en) * 2015-12-24 2016-05-11 重庆益堡科技有限公司 Inductor
CN205230765U (en) * 2015-12-24 2016-05-11 重庆益堡科技有限公司 Can overcurrent and thermal diffusivity good inductor again

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Application publication date: 20180720