CN114883090A - Coating type inductance - Google Patents
Coating type inductance Download PDFInfo
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- CN114883090A CN114883090A CN202210439385.6A CN202210439385A CN114883090A CN 114883090 A CN114883090 A CN 114883090A CN 202210439385 A CN202210439385 A CN 202210439385A CN 114883090 A CN114883090 A CN 114883090A
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- layer
- coil
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- magnetic core
- electrode
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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
- H01F27/34—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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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Soft Magnetic Materials (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
The invention discloses a coating type inductor, comprising: totally closed magnet structure, coil, shielding layer, go up insulating layer, electrode, totally closed magnet structure includes: magnetic core, magnetic cement layer, the coil is around on the side wire casing of magnetic core, the degree of depth of the wire casing of magnetic core is 0.4-0.8 times of coil thickness, the complete cladding of magnetic cement layer the side of coil and magnetic core, the electrode sets up the lower part at totally closed magnet structure, the wiring end and the electrode connection of coil, the shielding layer covers the upper portion of totally closed magnet structure, it covers to go up the insulating layer the shielding layer. According to the invention, the shielding layer covers the contact surface of the magnetic core and the magnetic glue layer, so that magnetic leakage is avoided, eddy current formed by the magnetic leakage and external metal is avoided, the ACR of the inductor is ensured to be still stable under the frequency change, and the energy conversion efficiency of the conventional switching power supply is improved.
Description
Technical Field
The invention relates to the technical field of inductors, in particular to a coating type inductor.
Background
With the development of the switching power supply, high frequency has become an important trend of the switching power supply, and the coating type winding inductor has been applied in a large amount because of low cost and high manufacturing yield, and no risk of copper wire open and short circuit caused by integral molding is caused.
Accordingly, the prior art is deficient and needs improvement.
Disclosure of Invention
The invention aims to solve the technical problems that: the coating type inductor is provided, magnetic leakage is avoided, ACR of the inductor is optimized, and conversion efficiency of a switching power supply is improved.
The technical scheme of the invention is as follows: provided is a coated inductor including: totally closed magnet structure, coil, shielding layer, go up insulating layer, electrode, totally closed magnet structure includes: magnetic core, magnetic cement layer, the coil is around on the side wire casing of magnetic core, the degree of depth of the wire casing of magnetic core is 0.4-0.8 times of coil thickness, the complete cladding of magnetic cement layer the side of coil and magnetic core, the electrode sets up the lower part at totally closed magnet structure, the wiring end and the electrode connection of coil, the shielding layer covers the upper portion of totally closed magnet structure, it covers to go up the insulating layer the shielding layer.
Preferably, the electrode setting is under the handing-over department of magnetic core and coil and outwards extends 0.1-0.3mm, the bilayer structure on copper layer and zinc layer is adopted to the structure of electrode, the thickness of electrode is 10um-20 um.
Preferably, the depth of the wire groove of the magnetic core is 0.5-0.75 times of the thickness of the coil.
Preferably, the magnetic core is at least one of iron-based alloy, iron-based amorphous, iron-based nanocrystalline and carbonyl iron powder and an adhesive composition; the magnetic glue layer adopts a composition of adhesive and at least one of iron-based alloy, iron-based amorphous, iron-based nanocrystalline and carbonyl iron powder.
Preferably, the magnetic core and the magnetic glue layer have the same material composition.
Preferably, the terminal of the coil is connected with the electrode through the magnetic glue layer.
Preferably, the outer diameter of the coil does not exceed the side surface of the magnetic core by 0.3 mm.
Preferably, the adhesive is epoxy resin or acrylic resin.
Preferably, the shielding layer is one or a combination of at least two of Fe, Cu and Al, and the thickness of the shielding layer is 0.5um-2 um.
Preferably, the coating type inductor further comprises a lower insulating layer interposed between the electrodes; the upper insulating layer and the lower insulating layer adopt epoxy resin and/or parylene; the thickness of the upper insulating layer and the lower insulating layer is 3um-10 um.
By adopting the scheme, the coating type inductor provided by the invention has the advantages that the shielding layer covers the contact surface of the magnetic core and the magnetic glue layer, so that the magnetic leakage is avoided, the eddy current formed by the magnetic leakage and the external metal is avoided, the ACR of the inductor is ensured to be still stable under the frequency change, and the energy conversion efficiency of the conventional switching power supply is improved.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of another perspective view of the embodiment shown in FIG. 1;
FIG. 3 is a cross-sectional view of FIG. 1;
fig. 4 is a schematic structural view of an electrode.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Referring to fig. 1-4, the present invention provides a coating type inductor, including: totally closed magnet structure, coil 10, shielding layer 11, go up insulating layer 12, electrode 13, totally closed magnet structure includes: magnetic core 14, magnetic cement layer 15, coil 10 is in on the side wire casing of magnetic core 14, the degree of depth of the wire casing of magnetic core 14 is 0.4-0.8 times of coil 10 thickness, the complete cladding of magnetic cement layer 15 the side of coil 10 and magnetic core 14, electrode 13 sets up the lower part at totally closed magnet structure, the wiring end and the electrode 13 of coil 10 are connected, shielding layer 11 covers the upper portion of totally closed magnet structure, go up insulating layer 12 and cover shielding layer 11. The shielding layer 11 is deposited on the surfaces of the magnetic core 14 and the magnetic glue layer 15 through a physical vapor deposition process, and the two-end electrodes 13 are prevented from being short-circuited due to conduction of the shielding layer through a pre-prepared mask.
In this embodiment, the electrode 13 is disposed right below the junction of the magnetic core 14 and the coil 10 and extends outward for 0.1-0.3mm, the electrode 13 has a double-layer structure of a copper layer 21 and a zinc layer 22, and the thickness of the electrode 13 is 10-20 um. The electrode 13 is formed by electroplating.
In the present embodiment, the depth of the slot of the magnetic core 14 is 0.5-0.75 times the thickness of the coil 10.
In this embodiment, the magnetic core 14 is a combination of an adhesive and at least one of an iron-based alloy, an iron-based amorphous, an iron-based nanocrystal, and carbonyl iron powder; the magnetic glue layer 15 is made of a composition of an adhesive and at least one of an iron-based alloy, an iron-based amorphous alloy, an iron-based nanocrystalline and carbonyl iron powder.
In the present embodiment, the material composition of the magnetic core 14 and the magnetic glue layer 15 is the same.
In this embodiment, the terminals of the coil 10 are connected to the electrodes 13 through the magnetic layer 15.
In this embodiment, the outer diameter of the coil 10 does not exceed the side of the core 14 by 0.3 mm.
In this embodiment, the adhesive is an epoxy resin or an acrylic resin.
In this embodiment, the shielding layer 11 is one or a combination of at least two of Fe, Cu, and Al, and the thickness of the shielding layer 11 is 0.5um to 2 um.
In this embodiment, the coating type inductor further includes a lower insulating layer 16 interposed between the electrodes 13; the upper insulating layer 12 and the lower insulating layer 16 are made of epoxy resin and/or parylene; the thickness of the upper insulating layer 12 and the lower insulating layer is 3um-10 um. The upper insulating layer 12 and the lower insulating layer 16 are both made by a roll-spray curing or chemical vapor deposition process.
In summary, the present invention provides a coating type inductor, in which a shielding layer covers a contact surface between a magnetic core and a magnetic glue layer, so as to avoid magnetic leakage, avoid eddy current formed between the magnetic leakage and external metal, ensure that the ACR of the inductor is still stable under frequency variation, and improve the energy conversion efficiency of the conventional switching power supply.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A coated inductor, comprising: totally closed magnet structure, coil, shielding layer, go up insulating layer, electrode, totally closed magnet structure includes: magnetic core, magnetic cement layer, the coil is around on the side wire casing of magnetic core, the degree of depth of the wire casing of magnetic core is 0.4-0.8 times of coil thickness, the complete cladding of magnetic cement layer the side of coil and magnetic core, the electrode sets up the lower part at totally closed magnet structure, the wiring end and the electrode connection of coil, the shielding layer covers the upper portion of totally closed magnet structure, it covers to go up the insulating layer the shielding layer.
2. The coated inductor as claimed in claim 1, wherein the electrode is disposed directly under the junction of the magnetic core and the coil and extends outward for 0.1-0.3mm, the electrode has a double-layer structure of copper layer and zinc layer, and the thickness of the electrode is 10-20 um.
3. A coated inductor according to claim 1, characterised in that the depth of the winding slots of the core is 0.5-0.75 times the thickness of the winding.
4. The coated inductor as recited in claim 1, wherein the magnetic core is a combination of an adhesive and at least one of an iron-based alloy, an iron-based amorphous, an iron-based nanocrystalline, and carbonyl iron powder; the magnetic glue adopted by the magnetic glue layer is a composition of adhesive and at least one of iron-based alloy, iron-based amorphous, iron-based nanocrystalline and carbonyl iron powder.
5. A coated inductor according to claim 4, characterised in that the material composition of the magnetic core and the glue layer is the same.
6. The coated inductor of claim 1, wherein the terminals of the coil are connected to the electrodes through the layer of magnetic glue.
7. A coated inductor according to claim 1, characterised in that the outer diameter of the coil does not exceed the side of the core by 0.3 mm.
8. The coated inductor as claimed in claim 4, wherein the adhesive is an epoxy resin or an acrylic resin.
9. The coated inductor as claimed in claim 1, wherein the shielding layer is one or a combination of at least two of Fe, Cu, and Al, and the thickness of the shielding layer is 0.5um to 2 um.
10. The coated inductor of claim 1, further comprising a lower insulating layer interposed between said electrodes; the upper insulating layer and the lower insulating layer adopt epoxy resin and/or parylene; the thickness of the upper insulating layer and the lower insulating layer is 3um-10 um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210439385.6A CN114883090A (en) | 2022-04-25 | 2022-04-25 | Coating type inductance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210439385.6A CN114883090A (en) | 2022-04-25 | 2022-04-25 | Coating type inductance |
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| Publication Number | Publication Date |
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| CN114883090A true CN114883090A (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210439385.6A Pending CN114883090A (en) | 2022-04-25 | 2022-04-25 | Coating type inductance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117854895A (en) * | 2024-01-15 | 2024-04-09 | 百斯特电子(广东)有限公司 | Temperature-resistant inductor |
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2022
- 2022-04-25 CN CN202210439385.6A patent/CN114883090A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117854895A (en) * | 2024-01-15 | 2024-04-09 | 百斯特电子(广东)有限公司 | Temperature-resistant inductor |
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