Core structure and magnetic device

Patent metadata

Field	Value
Publication number	US-11728087-B2
Application number	US-202016992166-A
Country	US
Kind code	B2
Filing date	Aug 13, 2020
Priority date	May 25, 2016
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

A magnetic dev ice includes a core structure, at least one inductor winding and at least two transformer windings. The core structure includes at least one inductor column and at least two transformer columns. The at least one inductor winding respectively winds around the at least one inductor column. The at least two transformer windings, wind around the at least two transformer columns respectively, and the transformer winding includes primary winding and secondary winding. Wherein the magnetic flax directions on adjacent transformer columns are opposite to each other when providing a current in the corresponding primary windings simultaneously.

First claim

What is claimed is:

1. A magnetic device, comprising:
a core structure, comprising:
a first magnetic cover and a second magnetic cover; and
at least three winding columns and at least one common side column provided between the first magnetic cover and the second magnetic cover, and the at least three winding columns and the at least one common side column are opposite to each other, wherein at least one of the at least three winding columns is an inductor column, and the remaining at least two winding columns of the at least three winding columns are transformer columns;

at least one inductor winding, respectively winds around the at least one inductor column of the core structure; and
at least two transformer windings, wind around the transformer columns of the core structure respectively, and the transformer winding comprises primary winding and secondary winding,
wherein the magnetic flux directions on adjacent transformer columns are opposite to each other when providing a current in the corresponding primary windings simultaneously.

2. The magnetic device according to claim 1 , wherein winding directions of the primary winding on adjacent transformer columns are opposite to each other.

3. The magnetic device according to claim 1 , wherein a winding direction of the inductor winding and a winding direction of the primary winding adjacent to the inductor winding are opposite to each other.

4. The magnetic device according to claim 1 , wherein a winding direction of the inductor winding is the same as a winding direction of the primary winding adjacent to the inductor winding.

5. The magnetic device according to claim 1 , wherein the at least three winding columns are provided on either of the first magnetic cover and the second magnetic cover, and the at least one common side column is provided on either of the first magnetic cover and the second magnetic cover.

6. The magnetic device according to claim 1 , wherein a portion of each winding column and that of each common side column are provided on the first magnetic cover, and the other portion of each winding column and that of each common side column are provided on the second magnetic cover.

7. The magnetic device according to claim 1 , wherein one or more of the winding columns have a cross-section of circular, oval or runway shape.

8. The magnetic device according to claim 1 , wherein a side wall of the at least one common side column towards the at least three winding columns is provided with at least one first protrusion which extends towards a gap formed between two adjacent winding columns.

9. The magnetic device according to claim 1 , wherein a side wall of the common side column comprises at least three curved surfaces which are respectively corresponding to the at least three winding columns, and three adjacent curved surfaces form the first protrusion at the position where they are connected together.

10. The magnetic device according to claim 9 , wherein a projection of the curved surface on the first magnetic cover or on the second magnetic cover has a circular, partial elliptical or partial runway shape.

11. The magnetic device according to claim 8 , wherein the first protrusion extends towards the gap formed between the adjacent two winding columns to or beyond a virtual surface which is formed by means of connecting with the side walls of the at least three winding columns opposite to the common side column.

12. The magnetic device according to claim 8 , wherein a second protrusion is provided at each of the two end portions of the common side column respectively, and the two second protrusions correspond to two end portions of the first magnetic cover or the second magnetic cover and extend along the same direction as that of the first protrusion.

13. The magnetic device according to claim 1 , wherein a first air gap is formed on the at least one inductor column, second air gaps are formed on the transformer columns, respectively.

14. The magnetic device according to claim 1 , wherein four winding columns and at least one common side column provided between the first magnetic cover and the second magnetic cover, one of the four winding columns is an inductor column, and three of the four winding columns are transformer columns.

15. The magnetic device according to claim 1 , wherein the wire formed the primary windings in adjacent transformer columns is substantially in a “∞” shape, or each of the wires of the primary windings wind firstly around the corresponding winding columns respectively, and then connected together in sequence, or the wire formed the primary windings is substantially in a connected “C” shape which located between the winding columns and the common side column.

16. The magnetic device according to claim 15 , wherein a lead direction of the wire is consistent with the line connecting the at least three winding columns in the core structure.

17. The magnetic device according to claim 15 , wherein the wire is a PCB wire formed in a PCB board.

18. The magnetic device according to claim 1 , wherein the primary winding is formed by at least one C-shaped winding segment and a first arc winding segment connected with each other in series, and a second arc winding segment facing the first arc winding segment; or the primary winding is formed by at least one C-shaped winding segment connected with each other in series.

19. The magnetic device according to claim 18 , wherein the inductor winding is formed by at least one C-shaped winding segment and a first arc winding segment connected with each other in series, and a second arc winding segment facing the first arc winding segment.

20. The magnetic device according to claim 1 , wherein the at least one inductor winding and the primary windings are formed by at least one winding unit, wherein each winding unit comprises one wire and multiple arc winding segments, wherein the wire in turn, and alternately clockwise and counterclockwise, winds the at least three winding columns, and the last winding column of the at least three winding columns is wound one circle, and the other winding columns are wound half circle respectively; the multiple arc winding segments are correspondingly disposed at the at least three winding columns except for the last winding column, and the multiple arc winding segments are connected in series and connected to the wire in series.

21. The magnetic device according to claim 1 , wherein the at least one inductor winding and one of the primary windings adjacent to the at least one inductor winding are formed by one wire, wherein the wire is around the at least one inductor column and one of the transformer columns adjacent to the at least one inductor column.

22. The magnetic device according to claim 1 , wherein the secondary winding comprises at least two secondary winding, and each of the at least two secondary winding winds around the at least two transformer columns, respectively.

23. The magnetic device according to claim 22 , wherein the secondary winding has a lead direction far away from the common side column, and the lead direction forms an angle ranged 45° ˜135° with the length direction of the common side column.

24. The magnetic device according to claim 22 , wherein the wire of the secondary winding is a PCB wire formed in a PCB board.

Assignees

• Delta Electronics Shanghai Co

Inventors

• Yang Haijun
• Lu Zengyi
• Hong Tianding
• Zhang Jinfa

Classifications

• H01F27/24 Primary

  Magnetic cores · CPC title

• H01F27/2804

  Printed windings · CPC title

• H01F41/041

  Printed circuit coils (apparatus or processes for manufacturing printed circuits in general H05K3/00) · CPC title

• H01F3/14 Primary

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

• H01F27/2823

  Wires (H01F27/2866 takes precedence) · CPC title