CN113223824A - High-capacity power inductor convenient for automatic production - Google Patents
High-capacity power inductor convenient for automatic production Download PDFInfo
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- CN113223824A CN113223824A CN202110473338.9A CN202110473338A CN113223824A CN 113223824 A CN113223824 A CN 113223824A CN 202110473338 A CN202110473338 A CN 202110473338A CN 113223824 A CN113223824 A CN 113223824A
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- magnetic core
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 230000006698 induction Effects 0.000 claims abstract description 40
- 239000011324 bead Substances 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 abstract description 5
- 239000011162 core material Substances 0.000 description 46
- 229920000784 Nomex Polymers 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004763 nomex Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229920006335 epoxy glue Polymers 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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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
- H01F27/24—Magnetic cores
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
The invention discloses a high-capacity power inductor convenient for automatic production, which relates to the field of inductors and comprises a first magnetic core, a second magnetic core and a flat sheet-shaped magnetic induction coil arranged between the first magnetic core and the second magnetic core; a first center pillar is arranged in the middle of the first magnetic core, a second center pillar is arranged in the middle of the second magnetic core, the first center pillar extends into one end of the sheet-shaped magnetic induction coil, the second center pillar extends into the other end of the sheet-shaped magnetic induction coil, and an air gap is formed between the first center pillar and the second center pillar; the sheet-shaped magnetic induction coil comprises a first pin and a second pin; the invention mainly solves the technical problems of poor production precision, low production efficiency and low production yield of the existing inductor; the flat sheet-type magnetic induction coil is used as a winding for large current and high inductance, the sheet-type magnetic induction coil can be directly punched and molded, and manual winding is not needed, so that the assembly efficiency of the inductor is greatly improved.
Description
Technical Field
The invention relates to the field of inductors, in particular to a high-capacity power inductor convenient for automatic production.
Background
Inductance is a property of a closed loop and is a physical quantity. When current passes through the coil, magnetic field induction is formed in the coil, and the induced magnetic field can generate induction current to resist the current passing through the coil. This interaction of current with the coil is called the inductive reactance of electricity, i.e. inductance, in units of "henry (H)", which is a parameter of the circuit describing the effect of an induced electromotive force caused in the coil or in another coil due to a change in the current of the coil. Inductance is a generic term for self-inductance and mutual inductance.
Because traditional power inductance all needs to carry out the coiling with artifical to first coil in the manufacturing process, again with coil and magnetic core assembly together, and it is fixed to glue at last, consequently the production of traditional inductance can be more time-consuming and the defective rate is higher, and the coil of artifical coiling also has the relatively poor shortcoming of precision, and the production efficiency and the production qualification rate of the coil of traditional structure can not satisfy customer's demand.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a high-capacity power inductor convenient for automatic production, and mainly solves the technical problems of poor production precision, low production efficiency and low production yield of the conventional inductor.
In order to achieve the above object, the present invention provides a high-capacity power inductor convenient for automatic production, which comprises a first magnetic core, a second magnetic core and a flat sheet-shaped magnetic induction coil arranged between the first magnetic core and the second magnetic core; a first center pillar is arranged in the middle of the first magnetic core, a second center pillar is arranged in the middle of the second magnetic core, the first center pillar extends into one end of the sheet-shaped magnetic induction coil, the second center pillar extends into the other end of the sheet-shaped magnetic induction coil, and an air gap is formed between the first center pillar and the second center pillar; the sheet-shaped magnetic induction coil comprises a sheet-shaped first pin arranged on the outer side of the first magnetic core and a sheet-shaped second pin arranged on the outer side of the second magnetic core.
Preferably, both sides of first magnetic core and second magnetic core all are provided with bellied magnetic pillar, first pin and second pin all set up in the outside of bellied magnetic pillar.
Preferably, an air gap adjusting member is disposed between the raised magnetic pillar on the first magnetic core and the raised magnetic pillar on the second magnetic core.
Preferably, the air gap adjusting member is a glass bead.
Preferably, the first and second magnetic cores are both ED-type magnetic cores.
Preferably, the number of turns of the sheet-shaped magnetic induction coil is two.
Preferably, the distance between every two circles of the sheet-shaped magnetic induction coil is 1mm +/-0.2 mm.
Preferably, the sheet-like magnetic induction coil is a copper member.
Compared with the prior art, the invention has the beneficial effects that:
the inductor of the technical scheme adopts the flat sheet-shaped magnetic induction coil as a winding used by large current and high inductance, the sheet-shaped magnetic induction coil can be directly punched and formed, and manual winding is not needed, so the production precision of the sheet-shaped magnetic induction coil is higher, the production efficiency is high, and the assembly efficiency of the inductor is greatly improved, during assembly, the sheet-shaped magnetic induction coil is sleeved on the first center pillar of the first magnetic core, then the second center pillar on the second magnetic core is inserted into the middle part of the sheet-shaped magnetic induction coil, and finally, the assembly can be completed by dispensing and fixing, wherein the first center pillar and the second center pillar which are positioned inside the sheet-shaped magnetic induction coil are convenient for forming a reasonable magnetic loop between the first magnetic core and the second magnetic core, the air gap between the first center pillar and the second center pillar can reduce the magnetic conductivity, so that the characteristic of the wire Wei is less dependent on the initial magnetic conductivity of a magnetic core material, and the air gap can avoid the magnetic saturation phenomenon under the condition of alternating current large signal or direct current bias, thereby better controlling the inductance. In addition, the first pin and the second pin on the sheet-shaped magnetic induction coil are respectively the positive pole and the negative pole of the inductor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a high-capacity power inductor convenient for automatic production according to the present invention;
fig. 2 is an exploded view of a high-capacity power inductor convenient for automatic production according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, the present invention provides a high-capacity power inductor with easy automation, which includes a first magnetic core 1, a second magnetic core 2, and a flat sheet-like magnetic induction coil 3 disposed between the first magnetic core 1 and the second magnetic core 2.
Specifically, in this embodiment, in consideration of the magnetic flux, the length of the magnetic line and the effective cross-sectional area, the first magnetic core 1 and the second magnetic core 2 are preferably ED-type magnetic cores, and the inductor of the present technical solution can be applied to high-current and high-inductance occasions such as Server motherboards, data networks and storage system motherboards, or in dc resistance detection circuits. Therefore, the first center leg 11 is provided at the middle of the first core 1, and the second center leg 21 is provided at the middle of the second core 2. The first center pillar 11 extends into one end of the sheet-like magnetic induction coil 3, and the second center pillar 21 extends into the other end of the sheet-like magnetic induction coil 3, thereby forming a reasonable magnetic circuit. In addition, an air gap 4 is provided between the first center leg 11 and the second center leg 21, which reduces the permeability, making the characteristics of the wire Wei less dependent on the initial permeability of the core material, and which avoids magnetic saturation under large ac signals or dc bias, thereby better controlling the inductance. Further, the sheet-like magnetic induction coil 3 includes a first leg 31 and a second leg 32, wherein the first leg 31 is disposed as a positive electrode and outside the first magnetic core 1, and the second leg 32 is disposed as a negative electrode outside the second magnetic core 2.
Particularly, this technical scheme's inductance has adopted flat slice formula magnetic induction coil 3 as the winding that the high inductance of heavy current used, but slice formula magnetic induction coil 3 direct stamping forming, no longer need the manual work to come the coiling, consequently, the precision of slice formula magnetic induction coil 3 production is higher, the efficiency of production is also fast, thereby improve the packaging efficiency of inductance by a wide margin, during the assembly, overlap slice formula magnetic induction coil 3 on first center pillar 11 of first magnetic core 1, then insert slice formula magnetic induction coil 3's middle part with second center pillar 21 on the second magnetic core 2, adopt epoxy glue to glue at last and fix and can accomplish the equipment.
Referring to fig. 1 and fig. 2, in the present embodiment, the material of the sheet-shaped magnetic induction coil 3 is preferably copper with excellent conductivity, the number of turns is preferably two, and the distance between every two turns is 1mm ± 0.2mm, of course, the number of turns and the distance of the sheet-shaped magnetic induction coil 3 mainly take into consideration the requirements of rated current and dc resistance during operation.
More specifically, the two sides of the first magnetic core 1 and the second magnetic core 2 of the ED type are both provided with the convex magnetic columns 12, and the convex magnetic columns 12 on the two sides can play a role of magnetic shielding, so that the use requirement of high current and high inductance is met. Meanwhile, the first pin 31 and the second pin 32 are both conveniently arranged on the outer side of the magnetic column 12, and the structure is more compact and reasonable.
Further, an air gap adjusting member 5 is disposed between the pillar 12 of the first core 1 and the pillar 12 of the second core 2. The air gap adjusting member 5 can be a polyester film or a NOMEX sheet, but the polyester film or the NOMEX sheet is easy to deform or even fall off when subjected to high temperature, which affects the inductance value accuracy of the inductor, and even causes the phenomenon of inductor failure, therefore, in order to enable the inductor to have the high temperature resistance characteristic while having high current and high inductance, the air gap adjusting member 5 is preferably a glass bead, the glass bead has stable performance, low cost, is not easy to break, strong adhesion, and more high temperature resistant diameter types, so on one hand, the inductor can have the high temperature resistant characteristic, on the other hand, the inductor can adjust the air gap size between the first magnetic core 1 and the second magnetic core 2 according to the glass beads with various diameters, thereby adjusting the inductance value of the inductor, the inductance value adjusting process is simpler, and under the condition that the structures of the first magnetic core 1 and the second magnetic core 2 are not changed, the inductor has various inductance value specifications, therefore, by adopting the structure of the inductor, the same production process can efficiently meet various requirements of users. It should be noted that, in order to simplify the manufacturing process, the glass beads are preferably added to the epoxy resin and then coated on the end surfaces of the magnetic pillars 12, so that the glass beads may be disposed between the magnetic pillars 12 of the first magnetic core 1 and the magnetic pillars 12 of the second magnetic core 2, and the epoxy resin may also bond the first magnetic core 1 and the second magnetic core 2 together.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (8)
1. A high-capacity power inductor convenient for automatic production is characterized by comprising a first magnetic core (1), a second magnetic core (2) and a flat sheet-shaped magnetic induction coil (3) arranged between the first magnetic core (1) and the second magnetic core (2); a first center pillar (11) is arranged in the middle of the first magnetic core (1), a second center pillar (21) is arranged in the middle of the second magnetic core (2), the first center pillar (11) extends into one end of the sheet-shaped magnetic induction coil (3), the second center pillar (21) extends into the other end of the sheet-shaped magnetic induction coil (3), and an air gap (4) is formed between the first center pillar (11) and the second center pillar (21); the sheet-shaped magnetic induction coil (3) comprises a sheet-shaped first pin (31) arranged outside the first magnetic core (1) and a sheet-shaped second pin (32) arranged outside the second magnetic core (2).
2. A high-capacity power inductor convenient for automatic production according to claim 1, wherein the first magnetic core (1) and the second magnetic core (2) are provided with protruding magnetic columns (12) on both sides, and the first pin (31) and the second pin (32) are provided on the outer sides of the protruding magnetic columns (12).
3. A high capacity power inductor convenient for automatic production according to claim 2, characterized in that an air gap adjusting member (5) is provided between the magnetic pillar (12) on the first magnetic core (1) and the magnetic pillar (12) on the second magnetic core (2).
4. A high capacity power inductor in accordance with claim 3, characterized by that, the air gap adjusting component (5) is glass bead.
5. A high capacity power inductor with high capacity convenient for automatic production according to claim 2, wherein the first magnetic core (1) and the second magnetic core (2) are both ED type magnetic cores.
6. A high capacity power inductor convenient for automatic production according to any one of claims 1-5, characterized in that the number of turns of the sheet-like magnetic induction coil (3) is two.
7. A high capacity power inductor convenient for automatic production according to any one of claims 1-5, characterized in that the spacing between each turn of the sheet-like magnetic induction coil (3) is 1mm ± 0.2 mm.
8. A high capacity power inductor convenient for automatic production according to any one of claims 1-5, characterized in that the chip-type magnetic induction coil (3) is a copper member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110473338.9A CN113223824A (en) | 2021-04-29 | 2021-04-29 | High-capacity power inductor convenient for automatic production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110473338.9A CN113223824A (en) | 2021-04-29 | 2021-04-29 | High-capacity power inductor convenient for automatic production |
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| Publication Number | Publication Date |
|---|---|
| CN113223824A true CN113223824A (en) | 2021-08-06 |
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| CN202110473338.9A Pending CN113223824A (en) | 2021-04-29 | 2021-04-29 | High-capacity power inductor convenient for automatic production |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114005649A (en) * | 2021-10-21 | 2022-02-01 | 江西省高新超越精密电子有限公司 | Large-current inductor for rapid multiphase voltage adjustment |
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| CN104637659A (en) * | 2015-02-11 | 2015-05-20 | 华为技术有限公司 | Coupling inductor and interleaved direct-current (DC) converter |
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2021
- 2021-04-29 CN CN202110473338.9A patent/CN113223824A/en active Pending
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| CN103903836A (en) * | 2014-03-19 | 2014-07-02 | 台达电子企业管理（上海）有限公司 | Magnetic element and iron cores thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114005649A (en) * | 2021-10-21 | 2022-02-01 | 江西省高新超越精密电子有限公司 | Large-current inductor for rapid multiphase voltage adjustment |
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Application publication date: 20210806 |
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