CN111477427A - Power inductor for high and low load scene - Google Patents
Power inductor for high and low load scene Download PDFInfo
- Publication number
- CN111477427A CN111477427A CN202010470631.5A CN202010470631A CN111477427A CN 111477427 A CN111477427 A CN 111477427A CN 202010470631 A CN202010470631 A CN 202010470631A CN 111477427 A CN111477427 A CN 111477427A
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- China
- Prior art keywords
- magnetic
- low load
- inductor
- power inductor
- magnetic layer
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- 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.)
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Links
- 230000035699 permeability Effects 0.000 claims abstract description 14
- 238000004804 winding Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 229910005347 FeSi Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 2
- 229910002555 FeNi Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Classifications
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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
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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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
The invention provides a power inductor for high and low load scenes, which is suitable for high and low load modes at the same time and comprises a first magnetic column with high saturation characteristic positioned in the center of the inductor, a coil group surrounding the first magnetic column, a second magnetic layer surrounding the coil group and having high permeability and a third magnetic body surrounding the second magnetic layer and having high saturation characteristic. The invention has the beneficial effects that: the power inductor for high and low load scenes has the characteristics of high initial inductance and high inductance under large current, and is particularly suitable for scenes in which high and low load modes can be used. The inductor has high inductance under low load, so that the ripple current is small, which is beneficial to reducing the inductance loss; the inductor has relatively high inductance under high load, and can work normally.
Description
Technical Field
The invention relates to a power inductor for high and low load scenes.
Background
The inductor is a component widely used in electronic products, and most inductors are generally used in only one mode, but in practical requirements, the inductor is expected to be suitable for both high and low load modes.
Disclosure of Invention
A power inductor for high and low load scenes comprises a first magnetic column with high saturation characteristics, a coil group, a second magnetic layer and a third magnetic body, wherein the first magnetic column is located in the center of the inductor, the coil group surrounds the first magnetic column, the second magnetic layer surrounds the coil group and has high permeability, and the third magnetic body surrounds the second magnetic layer and has high saturation characteristics.
Furthermore, the coil group is an enameled wire annular winding.
Further, the coil has 5 turns and has an outer diameter and an inner diameter and a height of 6 and 4 and 2 mm.
Further, the first magnetic pillar has a relative magnetic permeability of 40 and an outer diameter of 4.0 × 4.0 mm; the second magnetic layer has relative permeability of 45 and the length, width and height of the second magnetic layer are respectively 7 x 3.0 mm; the third magnetic body has a relative magnetic permeability of 30 and a length, width and height of 8 x 4.0 mm.
The invention has the beneficial effects that: the power inductor for high and low load scenes has the characteristics of high initial inductance and high inductance under large current, and is particularly suitable for scenes in which high and low load modes can be used. The inductor has high inductance under low load, so that the ripple current is small, which is beneficial to reducing the inductance loss; the inductor has relatively high inductance under high load, and can work normally.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is an exploded view of the present invention;
fig. 3 is a cross-sectional view of the present invention.
Detailed Description
The invention will be further explained and illustrated with reference to the drawings.
Referring to fig. 1-3, a power inductor for high and low load scenes includes a first magnetic pillar (1) located at the center of the inductor and having high saturation characteristics, a coil assembly (2) surrounding the first magnetic pillar (1), a second magnetic layer (3) surrounding the coil assembly (2) and having high permeability, and a third magnetic body (4) surrounding the second magnetic layer (3) and having high saturation characteristics, wherein pins of the coil assembly (2) are led out from the bottom of the third magnetic body. The first magnetic column (1), the second magnetic layer (3) and the third magnetic body (4) are made of a plurality of soft magnetic materials with different magnetic properties, generally, the first magnetic column (1) has a high saturation property, the second magnetic layer (3) has a high magnetic permeability, and the third magnetic body (4) has a high saturation property, wherein the soft magnetic materials can be but are not limited to FeNi, FeSi, carbonyl iron powder, FeSiCr, amorphous and soft magnetic ferrite materials.
In a specific embodiment, the coil assembly (2) is an annular winding of enameled wire, the number of turns is 5, the outer diameter, the inner diameter and the height are 6, 4 and 2mm, the material of the first magnetic pole (1) is FeSi, the relative permeability is 40, the outer diameter and the height are 4.0 and 4.0, the material of the second magnetic layer (3) is FeSi, the relative permeability is 45, the length, the width and the height are 7, 7 and 3.0mm respectively, the material of the third magnetic body (4) is FeSi, the relative permeability is 30, the length, the width and the height are 8, 8 and 4.0mm, and the electrical characteristics of the inductor are tested according to the following results, namely, the initial inductor L is 2.02 muH, the inductor value under small current 2A is L1: 2.02 muH, and the inductor value under large current 20A is L2: 1.45 muH.
Claims (4)
1. A power inductor for high and low load scenes is characterized by comprising a first magnetic column with high saturation characteristics, a coil group, a second magnetic layer and a third magnetic body, wherein the first magnetic column is located in the center of the inductor, the coil group surrounds the first magnetic column, the second magnetic layer surrounds the coil group and has high permeability, and the third magnetic body surrounds the second magnetic layer and has high saturation characteristics.
2. The power inductor for high and low load scenes according to claim 1, wherein the coil assembly is a circular ring-shaped winding of enameled wires.
3. The power inductor for high and low load scenes according to claim 2, characterized in that said coil has 5 turns and an outer diameter and an inner diameter and a height of 6 and 4 and 2 mm.
4. The power inductor for high and low load scenes according to claim 1, wherein said first pole is a pole having a relative permeability of 40 and an outer diameter x height of 4.0 x 4.0 mm; the second magnetic layer has relative permeability of 45 and the length, width and height of the second magnetic layer are respectively 7 x 3.0 mm; the third magnetic body has a relative magnetic permeability of 30 and a length, width and height of 8 x 4.0 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010470631.5A CN111477427A (en) | 2020-05-28 | 2020-05-28 | Power inductor for high and low load scene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010470631.5A CN111477427A (en) | 2020-05-28 | 2020-05-28 | Power inductor for high and low load scene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111477427A true CN111477427A (en) | 2020-07-31 |
Family
ID=71765022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010470631.5A Pending CN111477427A (en) | 2020-05-28 | 2020-05-28 | Power inductor for high and low load scene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111477427A (en) |
-
2020
- 2020-05-28 CN CN202010470631.5A patent/CN111477427A/en active Pending
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