CN111477427A - Power inductor for high and low load scene - Google Patents

Power inductor for high and low load scene Download PDF

Info

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
Authority
CN
China
Prior art keywords
magnetic
low load
inductor
power inductor
magnetic layer
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
CN202010470631.5A
Other languages
Chinese (zh)
Inventor
赖敏敏
陈鹏
王玉生
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.)
Shenzhen Microgate Technology Co ltd
Original Assignee
Shenzhen Microgate Technology 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.)
Filing date
Publication date
Application filed by Shenzhen Microgate Technology Co ltd filed Critical Shenzhen Microgate Technology Co ltd
Priority to CN202010470631.5A priority Critical patent/CN111477427A/en
Publication of CN111477427A publication Critical patent/CN111477427A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00Fixed inductances of the signal type 
    • H01F17/04Fixed inductances of the signal type  with magnetic core
    • H01F17/045Fixed 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/24Magnetic cores
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/34Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields

Landscapes

  • 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

Power inductor for high and low load scene
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.
CN202010470631.5A 2020-05-28 2020-05-28 Power inductor for high and low load scene Pending CN111477427A (en)

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)

Similar Documents

Publication Publication Date Title
US11967446B2 (en) Packaging structure of a magnetic device
US5748013A (en) Combined magnetic core
US20040135660A1 (en) Low profile high current multiple gap inductor assembly
JP3204112U (en) Electronic components
KR100360970B1 (en) Multilayer inductor
KR20070074059A (en) Magnetic core and inductor, transformer comprising the same
US8400250B2 (en) Composite transformer
KR20120015323A (en) Miniature shielded magnetic component and methods of manufacture
TWI797480B (en) A low profile high current composite transformer
JP2008103430A (en) Inductor
JP2009004670A (en) Drum-type inductor and its manufacturing method
CN212136184U (en) Low-loss high-power common mode inductor
US10020110B2 (en) Surface mount power inductor component with stacked component accommodation
US8054149B2 (en) Monolithic inductor
CN212182062U (en) Power inductor for high and low load scene
CN111477427A (en) Power inductor for high and low load scene
CN111724968A (en) Inductor array
TWI622067B (en) Coil component
JP2007134631A (en) Power supply inductor
US7176778B1 (en) Magnetic core assembly having bobbin and mounting board thereof
CN216902498U (en) Full-shielding large-current inductor
WO2006070357A2 (en) Inductive electro-communication component core from ferro-magnetic wire
CN219738667U (en) Magnetic core
JP2006032663A (en) Inductor and its manufacturing method
CN219393138U (en) Combined high-efficiency low-cost three-phase flat wire vertical winding differential and common mode integrated inductor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination