Inductor and magnetic body thereof

• US 20060279395A1
• Filed: 05/22/2006
• Published: 12/14/2006
• Est. Priority Date: 06/10/2005
• Status: Abandoned Application

• Current Assignee: Delta Electronics Incorporated
• Original Assignee: Delta Electronics Incorporated
• Inventors: Lee, Cheng-Hong, Shiu, Ming-Shan
• Application Number:
  US11/437,672
• Publication Number:
  US 20060279395A1
• Time in Patent Office: Days
• US Class Current: 336/221
• CPC Class Codes: H01F 1/26 by macromolecular organic substances
• CPC Class Codes: H01F 17/043 with two, usually identical or nearly identical parts enclosing completely the coil (pot cores)
• CPC Class Codes: H01F 2017/046 helical coil made of flat wire, e.g. with smaller extension of wire cross section in the direction of the longitudinal axis
• CPC Class Codes: H01F 27/292 Surface mounted devices
• CPC Class Codes: H01F 27/34 Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
• CPC Class Codes: H01F 3/08 made from powder powder coatings on sheets H01F3/02; on strips or ribbons H01F3/04; on wires H01F3/06

Abstract

A magnetic body for a transforming device or a regulating device is formed by mixing a first magnetic material, a second magnetic material and a resin, and curing the mixture. The average particle size of the first magnetic material ranges from 35 μm to 125 μm and the average particle size of the second magnetic material is smaller than 35 μm.

Claims

1. A magnetic body comprising:

a first magnetic material with an average particle size ranged between 35 μ

m and 125 μ

m;

a second magnetic material with an average particle size smaller than 35 μ

m; and

a resin, wherein the magnetic body is formed by mixing the first magnetic material, the second magnetic material, and the resin and curing.

2. The magnetic body of claim 1, wherein the first magnetic material or the second magnetic material is Fe, Si, Co, Ni, Al, Mo, or the combination thereof.

3. The magnetic body of claim 1, wherein the shape of the first magnetic material or the second magnetic material is a sphere, a sphere-like shape, or an ellipsoid.

4. The magnetic body of claim 1, wherein the resin is a nano-inorganic material.

5. The magnetic body of claim 4, wherein the nano-inorganic material has high insulation capability and high thermal conductivity.

6. The magnetic body of claim 4, wherein an average particle size of the nano-inorganic material is smaller than 1 μ

m.

7. The magnetic body of claim 4, wherein the nano-inorganic material is AlN, SiC, BN, BeO, SiO₂, Al₂O₃ or diamond.

8. The magnetic body of claim 1, wherein the resin is a thermosetting resin or a photosetting resin.

9. An inductor, comprising:

a coil; and

at least one magnetic body for covering the coil, wherein the magnetic body is formed by mixing a first magnetic material, a second magnetic material, and a resin, and curing, wherein the first magnetic material and the second magnetic material have different average particle sizes.

10. The inductor of claim 9, wherein the average particle size of the first magnetic material ranges from 35 μ

m to 125 μ

m, and the average particle size of the second magnetic material is smaller than 35 μ

m.

11. The inductor of claim 9, wherein the first magnetic material or the second magnetic material is Fe, Si, Co, Ni, Al, Mo, or the combination thereof.

12. The inductor of claim 9, wherein the shape of the first magnetic material or the second magnetic material is a sphere, a sphere-like shape, or an ellipsoid.

13. The inductor of claim 9, wherein the resin is a nano-inorganic material.

14. The inductor of claim 13, wherein the nano-inorganic material has high insulation capability and high thermal conductivity.

15. The inductor of claim 13, wherein the average particle size of the nano-inorganic material is smaller than 1 μ

m.

16. The inductor of claim 13, wherein the nano-inorganic material is selected from the group consisting of AlN, SiC, BN, BeO, SiO₂, Al₂O₃ and diamond.

17. The inductor of claim 9, wherein the resin is a thermosetting resin or a photosetting resin.

18. The inductor of claim 9, wherein the coil is a circular wire with many turns, a square wire with many turns, or a flat wire with many turns.