Magnetic component

Patent metadata

Field	Value
Publication number	US-11056259-B2
Application number	US-201815966241-A
Country	US
Kind code	B2
Filing date	Apr 30, 2018
Priority date	May 16, 2017
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

There is disclosed a magnetic component which includes a first magnetic pole extending in a first direction and having an air gap provided therein, a second magnetic pole extending in the first direction, a cover plate extending in a second direction perpendicular to the first direction and connected with an end of the first magnetic pole and an end of the second magnetic pole, a protrusion formed on and at least partially surrounding the first magnetic pole, and a winding wound around the first magnetic pole at the air gap and having a lead supported by the protrusions such that a clearance is formed between the winding and the first magnetic pole.

First claim

What is claimed is:

1. A magnetic component comprising:
a first magnetic pole extending in a first direction and having an air gap provided therein;
a second magnetic pole extending in the first direction;
a cover plate extending in a second direction perpendicular to the first direction and connected with an end of the first magnetic pole and an end of the second magnetic pole;
a protrusion formed on and at least partially surrounding the first magnetic pole; and
a winding surrounding the first magnetic pole at the air gap and having a lead supported by the protrusion such that a clearance is formed between the winding and the first magnetic pole,
wherein the protrusion is formed on a side of the first magnetic pole where the lead is positioned, and the protrusion is in contact with the lead.

2. The magnetic component according to claim 1 , wherein the lead comprises a first portion not contacting the protrusion and a second portion contacting the protrusion, and an arrangement of the lead and protrusion satisfies the following relationship:
P 1≥ P/ 3,

wherein P represents a total width of the lead in the first direction, and P1 represents a width of the first portion.

3. The magnetic component according to claim 1 , wherein the lead comprises a first portion not contacting the protrusion and a second portion contacting the protrusion, and a first clearance is formed between the lead and the first magnetic pole, and an arrangement of the lead and the first magnetic pole satisfies the following relationship:
S 1≥ P 1/6,

wherein S1 represents a dimension of the first clearance in a third direction, P1 represents a width of the first portion, and wherein the third direction is perpendicular to a plane formed by the first and second directions.

4. The magnetic component according to claim 1 , wherein the protrusion is provided at each side of the air gap.

5. The magnetic component according to claim 4 , wherein in a cross section taken in a plane perpendicular to the first direction, a distance between the winding and an upper surface of the first magnetic pole in a third direction is represented by S3, a distance between the winding and a first side surface of the first magnetic pole in the second direction is represented by S2, and a distance between the winding and a second side surface of the first magnetic pole in the second direction is represented by S4, and at least one of the distances S2, S3 or S4 is greater than 0, and wherein the third direction is perpendicular to a plane formed by the first and second directions.

6. The magnetic component according to claim 5 , wherein at least one of the distances S2, S3 or S4 is equal to or greater than P/6, where P is a total width of the lead in the first direction.

7. The magnetic component according to claim 1 , wherein the first magnetic pole has a height in a third direction which is perpendicular to a plane formed by the first and second directions less than that of at least one of the second magnetic pole and the cover plate in the third direction.

8. The magnetic component according to claim 1 , wherein the winding has a length in the second direction greater than that of the first magnetic pole in the second direction.

9. The magnetic component according to claim 1 , wherein the winding has a height in a third direction which is perpendicular to a plane formed by the first and second directions greater than the height of the first magnetic pole in the third direction.

10. The magnetic component according to claim 1 , wherein in a third direction which is perpendicular to a plane formed by the first and second directions, the first magnetic pole has a bottom surface higher than that of at least one of the cover plate and the second magnetic pole.

11. The magnetic component according to claim 10 , wherein in the third direction, the protrusion has a bottom surface higher than that of at least one of the cover plate and the second magnetic pole.

12. The magnetic component according to claim 1 , wherein in a third direction which is perpendicular to a plane formed by the first and second directions, the winding has an upper surface below or being at the same plane as that of at least one of the cover plate and the second magnetic pole.

13. The magnetic component according to claim 1 , wherein the winding has stiffness sufficient to maintain its shape.

14. The magnetic component according to claim 1 , wherein a size of the protrusion decreases downwardly in a third direction which is perpendicular to a plane formed by the first and second directions.

15. The magnetic component according to claim 1 , wherein a non-magnetic material is interposed between the projection portion and the lead.

16. The magnetic component according to claim 1 , wherein the protrusion is made from a non-magnetic material.

17. The magnetic component according to claim 1 , wherein the projection portion and the first magnetic pole have a same material and are integrally formed.

18. The magnetic component according to claim 1 , wherein the first magnetic pole has a section in a plane formed by the second direction and a third direction, wherein the section has a shape of ellipse, rounded rectangular, chamfered rectangular, rhombus, fusiform, or a combination thereof, and wherein the third direction is perpendicular to a plane formed by the first and second directions.

19. The magnetic component according to claim 1 , wherein the projection portion is discontinuous in the second direction.

20. The magnetic component according to claim 1 , wherein the magnetic component comprises a plurality of the first magnetic poles, and the magnetic component is a multi-phase integrated inductor.

21. The magnetic component according to claim 1 , wherein the winding comprises a first lead and a second lead, and wherein the first and second leads are arranged below the first magnetic pole and the second magnetic pole, respectively.

22. The magnetic component according to claim 1 , wherein the magnetic component is an inductor or a transformer.

Assignees

• Delta Electronics Shanghai Co

Inventors

• Xin Zhangnan
• Zhou Jinping
• He Liangde

Classifications

• H01F3/14 Primary

  Constrictions; Gaps, e.g. air-gaps (in magnetic shunt paths H01F3/12) · CPC title

• H01F5/00

  Coils (superconducting coils H01F6/06; fixed inductances of the signal type H01F17/00) · CPC title

• H01F17/045 Primary

  with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core · CPC title

• H01F27/292

  Surface mounted devices · CPC title

• H01F27/24

  Magnetic cores · CPC title