Integrated transformer and power converter

Patent metadata

Field	Value
Publication number	US-11587718-B2
Application number	US-202017125950-A
Country	US
Kind code	B2
Filing date	Dec 17, 2020
Priority date	Dec 20, 2019
Publication date	Feb 21, 2023
Grant date	Feb 21, 2023

Abstract

This disclosure provides an integrated transformer and a power converter, the integrated transformer includes: a magnetic core, including an upper cover, a lower cover, a first winding column and a second winding column; a printed wiring board, disposed between the upper cover and the lower cover, and including a first through hole corresponding to the first winding column and a second through hole corresponding to the second winding column; and a first winding, a second winding, a third winding and a fourth winding; the first winding and the third winding are wound on the first winding column and the second winding column respectively, the second winding and the fourth winding are provided at positions corresponding to the first through hole and the second through hole on the printed wiring board, and magnetic flux directions within the first winding column and the second winding column are opposite.

First claim

What is claimed is:

1. An integrated transformer, comprising:
a magnetic core, comprising an upper cover, a lower cover, a first winding column and a second winding column, wherein the first winding column and the second winding column are disposed adjacently and are located between the upper cover and the lower cover;
a printed wiring board, disposed between the upper cover and the lower cover, wherein the printed wiring board comprises a first through hole and a second through hole, the first through hole corresponds to the first winding column, and the second through hole corresponds to the second winding column;
a first winding, wound on the first winding column;
a second winding, provided in the printed wiring board and corresponding to the first through hole;
a third winding, wound on the second winding column; and
a fourth winding, provided in the printed wiring board and corresponding to the second through hole,
wherein magnetic flux directions inside the first winding column and the second winding column are opposite.

2. The integrated transformer according to claim 1 , wherein the first winding and the third winding are electrically connected in series.

3. The integrated transformer according to claim 2 , wherein the second winding and the fourth winding are electrically connected in series or in parallel.

4. The integrated transformer according to claim 1 , wherein
the first winding comprises a first sub-winding and a second sub-winding, and the first sub-winding and the second sub-winding are respectively located on two sides of a plane where the printed wiring board is located; and the third winding comprises a third sub-winding and a fourth sub-winding, and the third sub-winding and the fourth sub-winding are respectively located on the two sides of the plane where the printed wiring board is located.

5. The integrated transformer according to claim 4 , wherein the first sub-winding and the second sub-winding are electrically connected in series or in parallel.

6. The integrated transformer according to claim 4 , wherein the third sub-winding and the fourth sub-winding are electrically connected in series or in parallel.

7. The integrated transformer according to claim 4 , wherein the first sub-winding and the third sub-winding are continuously wound on the first winding column and the second winding column using a same winding wire, and winding directions of the first sub-winding and the third sub-winding are opposite.

8. The integrated transformer according to claim 4 , wherein two first sub-winding columns corresponding to the first through hole are respectively provided on the upper cover and the lower cover, two second sub-winding columns corresponding to the second through hole are respectively provided on the upper cover and the lower cover, the two first sub-winding columns are oppositely disposed to form the first winding column, and the two second sub-winding columns are oppositely disposed to form the second winding column.

9. The integrated transformer according to claim 8 , wherein the first sub-winding and the second sub-winding are respectively wound on the two first sub-winding columns that are oppositely disposed, and the third sub-winding and the fourth sub-winding are respectively wound on the two second sub-winding columns that are oppositely disposed.

10. The integrated transformer according to claim 4 , wherein the integrated transformer further comprises a first bobbin, a second bobbin, a third bobbin and a fourth bobbin, wherein the first bobbin and the second bobbin are respectively located on two sides of the printed wiring board and correspond to the first winding column, and the third bobbin and the fourth bobbin are respectively located on the two sides of the printed wiring board and correspond to the second winding column.

11. The integrated transformer according to claim 10 , wherein for each bobbin of the first bobbin, the second bobbin, the third bobbin, and the fourth bobbin, a heat dissipation gap is provided between the each bobbin and the magnetic core or provided between the each bobbin and the printed wiring board.

12. The integrated transformer according to claim 1 , wherein an insulating sheet is provided between the printed wiring board and the first winding, and provided between the printed wiring board and the third winding.

13. The integrated transformer according to claim 1 , wherein a circuit module electrically connected to the second winding and the fourth winding is integrated on the printed wiring board, and the circuit module comprises a rectifying unit and/or a filtering unit.

14. The integrated transformer according to claim 1 , wherein at least one auxiliary winding and one auxiliary power circuit is provided on the printed wiring board, and an output end of the auxiliary winding is electrically connected to the auxiliary power circuit.

15. The integrated transformer according to claim 1 , wherein the first winding and the third winding are configured as primary windings of the integrated transformer, and the second winding and the fourth winding are configured as secondary windings of the integrated transformer.

16. The integrated transformer according to claim 3 , wherein the first winding and the third winding are configured as primary windings of the integrated transformer, and the second winding and the fourth winding are configured as secondary windings of the integrated transformer.

17. The integrated transformer according to claim 15 , wherein
the first winding and the second winding form the primary and secondary windings of a first transformer in the integrated transformer; and
the third winding and the fourth winding form the primary and secondary windings of a second transformer in the integrated transformer.

18. The integrated transformer according to claim 1 , wherein an insulation voltage between the first winding and the second winding is greater than or equal to 5 KVac, and an insulation voltage between the third winding and the fourth winding is greater than or equal to 5 KVac.

19. A power converter, comprising:
a magnetic component, comprising a primary winding and a secondary winding;
a primary circuit, electrically connected to the primary winding of the magnetic component; and
a secondary circuit, electrically connected to the secondary winding of the magnetic component,
wherein the magnetic component is configured as the integrated transformer as claimed in claim 1 , the first winding and the third winding form the primary winding of the magnetic component, and the second winding and the fourth winding form the secondary winding of the magnetic component.

20. The power converter according to claim 19 , wherein the secondary circuit comprises a rectifying unit and a filtering unit, wherein the rectifying unit is electrically connected between the secondary winding and the filtering unit.

Assignees

• Delta Electronics Shanghai Co

Inventors

• Wang Baohua
• Yang Tengfei

Classifications

• H05K1/18

  structurally associated with non-printed electric components (H05K1/16 takes precedence) · CPC title

• H02M3/33576

  having at least one active switching element at the secondary side of an isolation transformer · CPC title

• H02M3/33573

  Full-bridge at primary side of an isolation transformer · CPC title

• H02M3/003 Primary

  Constructional details, e.g. physical layout, assembly, wiring or busbar connections · CPC title

• H01F27/28 Primary

  Coils; Windings; Conductive connections · CPC title