A power inductor for high and low load scenarios

Abstract

A power inductor for use in high and low load scenarios. The purpose of the present invention is to provide a power inductor that is suitable for both high and low load modes. The power inductor includes a first magnetic column with high saturation characteristics located at the center of the inductor, a coil group surrounding the first magnetic column, a second magnetic layer surrounding the coil group and having high magnetic permeability, and a third magnetic body surrounding the second magnetic layer and having high saturation characteristics. The beneficial effect of the present invention is that the power inductor for use in high and low load scenarios has high initial inductance and high inductance characteristics under large current, and is particularly suitable for scenarios where both high and low load modes are used. Under low load, since the inductor has high inductance, the ripple current will be small, which helps to reduce inductor loss; under high load, the inductor has a relatively high inductance, ensuring that the inductor can work normally.

Description

Technical Field

[0001] The present invention relates to a power inductor for high and low load scenarios. Background Art

[0002] Inductors are a component widely used in electronic products. Most inductors are generally used in only one mode, but in actual needs, it is hoped that the inductor can be used in both high and low load modes. Summary of the Invention

[0003] A power inductor for high and low load scenarios includes a first magnetic column with high saturation characteristics located at the center of the inductor, a coil group surrounding the first magnetic column, a second magnetic layer surrounding the coil group and having high magnetic permeability, and a third magnetic body surrounding the second magnetic layer and having high saturation characteristics.

[0004] Furthermore, the coil assembly is an enameled wire annular winding.

[0005] Furthermore, the coil has 5 turns, and its outer diameter*inner diameter*height is 6*4*2 mm.

[0006] Furthermore, the first magnetic column has a relative magnetic permeability of 40 and an outer diameter * height of 4.0 * 4.0 mm; the second magnetic layer has a relative magnetic permeability of 45 and a length * width * height of 7 * 7 * 3.0 mm respectively; the third magnetic body has a relative magnetic permeability of 30 and a length * width * height of 8 * 8 * 4.0 mm.

[0007] The beneficial effects of the present invention are as follows: the power inductor for use in both high and low load scenarios has high initial inductance and high inductance even under high current, making it particularly suitable for use in both high and low load modes. Under low load, the high inductance of the inductor reduces ripple current, helping to reduce inductor losses; under high load, the relatively high inductance of the inductor ensures normal operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0009] Figure 2 It is an exploded schematic diagram of the present invention;

[0010] Figure 3 It is a cross-sectional view of the present invention. DETAILED DESCRIPTION

[0011] The present invention will be further explained and illustrated below in conjunction with the accompanying drawings.

[0012] Please refer to Figure 1-Figure 3A power inductor for high and low load scenarios, the power inductor comprises a first magnetic column (1) with high saturation characteristics located at the center of the inductor, a coil group (2) surrounding the first magnetic column (1), a second magnetic layer (3) surrounding the coil group (2) and having high magnetic permeability, and a third magnetic body (4) surrounding the second magnetic layer (3) and having high saturation characteristics, wherein the pins of the coil group (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 variety of soft magnetic materials with different magnetic characteristics. Generally, the first magnetic column (1) has high saturation characteristics, the second magnetic layer (3) has high magnetic permeability, and the third magnetic body (4) has high saturation characteristics. The soft magnetic materials can be, but are not limited to, FeNi, FeSi, carbonyl iron powder, FeSiCr, amorphous, or soft ferrite materials.

[0013] In a specific embodiment, the coil assembly (2) is an enameled wire annular winding with 5 turns, and its outer diameter * inner diameter * height is 6 * 4 * 2 mm. The first magnetic column (1) is made of FeSi, has a relative magnetic permeability of 40, and an outer diameter * height of 4.0 * 4.0 mm; the second magnetic layer (3) is made of FeSi, has a relative magnetic permeability of 45, and has a length * width * height of 7 * 7 * 3.0 mm; the third magnetic body (4) is made of FeSi, has a relative magnetic permeability of 30, and has a length * width * height of 8 * 8 * 4.0 mm. The electrical characteristics test results of the inductor are as follows: initial inductance value L: 2.02 μH, inductance value L1 at low current of 2 A: 2.02 μH; inductance value L2 at high current of 20 A: 1.45 μH.

Claims

1. A power inductor for high and low load scenarios, characterized in that: The power inductor includes a first magnetic column with high saturation characteristics located at the center of the inductor, a coil group surrounding the first magnetic column, a second magnetic layer surrounding the coil group and having high magnetic permeability, and a third magnetic body surrounding the second magnetic layer and having high saturation characteristics; the coil has 5 turns, and its outer diameter * inner diameter * height is 6 * 4 * 2 mm. The first magnetic column is a magnetic column with a relative magnetic permeability of 40 and an outer diameter * height of 4.0 * 4.0 mm; the second magnetic layer has a relative magnetic permeability of 45 and a length * width * height of 7 * 7 * 3.0 mm respectively; the third magnetic body is a magnetic body with a relative magnetic permeability of 30 and a length * width * height of 8 * 8 * 4.0 mm.

2. The power inductor for high and low load scenarios according to claim 1, characterized in that: The coil assembly is an enameled wire annular winding.

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