Magnetic assembly and power supply system with same

Patent metadata

Field	Value
Publication number	US-10504641-B2
Application number	US-201514970174-A
Country	US
Kind code	B2
Filing date	Dec 15, 2015
Priority date	Jul 9, 2015
Publication date	Dec 10, 2019
Grant date	Dec 10, 2019

Abstract

A magnetic assembly includes plural first magnetic cores, plural coil windings and a second magnetic core. Each of the plural first magnetic cores includes plural legs and a first connection part. The first connection part is connected with first terminals of the plural legs. The first connection part of the first magnetic core at an upper position is located adjacent to second terminals of the plural legs of the adjacent first magnetic core at a lower position. Each coil winding is wound around at least one leg of the plural legs of the corresponding first magnetic core so as to form a magnetic element of the corresponding converter. The second magnetic core is stacked over the plural first magnetic cores. The second magnetic core is located adjacent to the second terminals of the legs of the topmost first magnetic core.

First claim

What is claimed is:

1. A magnetic assembly for plural parallel-connected converters, the magnetic assembly comprising:
plural first magnetic cores stacked over each other from bottom to top, wherein each of the plural first magnetic cores comprises plural legs and a first connection part, and the first connection part is connected with first terminals of the plural legs, wherein the first connection part of the first magnetic core at an upper position is located adjacent to second terminals of the plural legs of the adjacent first magnetic core at a lower position;
plural coil windings, wherein each coil winding is wound around at least one leg of the plural legs of the corresponding first magnetic core so as to form a magnetic element of the corresponding converter; and
a second magnetic core stacked over the plural first magnetic cores, wherein the second magnetic core is located adjacent to the second terminals of the legs of the topmost first magnetic core;
wherein electric currents which flow through the plural first coil windings are in the same direction, and the magnetic fluxes through the first connection part of the upper first magnetic core which correspond to the two first coil windings of the two adjacent first magnetic cores are in opposite directions.

2. The magnetic assembly according to claim 1 , wherein the plural legs of each first magnetic core comprise a first central leg and two first side legs, wherein the two first side legs are opposed to each other with respect to the first central leg, and the first connection part is connected with the first terminals of the first central leg and the two first side legs, wherein the first connection part of the first magnetic core at the upper position is located adjacent to the second terminals of the first central leg and the two first sides legs of the adjacent first magnetic core at the lower position.

3. The magnetic assembly according to claim 2 , wherein each coil winding is wound around the first central leg of the corresponding first magnetic core.

4. The magnetic assembly according to claim 2 , wherein the second magnetic core comprise a second central leg, two second side legs and a second connection part, wherein the two second side legs are opposed to each other with respect to the second central leg, and the second connection part is connected with first terminals of the second central leg and the two second side legs, wherein second terminals of the second central leg and the two second side legs of the second magnetic cores are respectively located adjacent to the second terminals of the first central leg and the two first sides legs of the topmost first magnetic core.

5. The magnetic assembly according to claim 4 , wherein the first coil winding wound around the first central leg of the topmost first magnetic core is also partially wound around the second central leg of the second magnetic core.

6. The magnetic assembly according to claim 2 , wherein second magnetic core is an I-shaped core, wherein a first side of the I-shaped core is located adjacent to the second terminals of the first central leg and the two first sides legs of the topmost first magnetic core.

7. The magnetic assembly according to claim 6 , further comprising a third magnetic core, wherein the third magnetic core comprise a third central leg, two third side legs and a third connection part, wherein the two third side legs are opposed to each other with respect to the third central leg, and the third connection part is connected with first terminals of the third central leg and the two third side legs, wherein second terminals of the third central leg and the two third side legs of the third magnetic cores are located adjacent to a second side of the I-shaped core.

8. The magnetic assembly according to claim 1 , wherein the plural legs of each first magnetic core comprise two first side legs, and the first connection part is connected with the first terminals of the two first side legs, wherein the first connection part of the first magnetic core at the upper position is located adjacent to the second terminals of the two first sides legs of the adjacent first magnetic core at the lower position.

9. The magnetic assembly according to claim 8 , wherein each coil winding is wound around at least one of the two first side legs of the corresponding first magnetic core.

10. The magnetic assembly according to claim 2 , wherein the two first side legs of each first magnetic core have the same length.

11. The magnetic assembly according to claim 1 , wherein the magnetic element is an inductor, and the inductors of the plural converter have the same inductance value.

12. The magnetic assembly according to claim 1 , wherein a second coil winding is further wound around the at least one leg of the corresponding first magnetic core.

13. The magnetic assembly according to claim 12 , wherein the magnetic element is a transformer, wherein the first coil winding of the transformer is a primary coil winding, and the second coil winding of the transformer is a secondary coil winding.

14. The magnetic assembly according to claim 13 , wherein the transformers of the plural converter have the same magnetizing inductance value.

Assignees

• Delta Electronics Shanghai Co

Inventors

• Lu Zengyi
• Yan Yajiang
• Yang Haijun
• Sun Jun

Classifications

• H02M3/1584

  with a plurality of power processing stages connected in parallel · CPC title

• H01F3/10 Primary

  Composite arrangements of magnetic circuits · CPC title

• H01F37/00

  Fixed inductances not covered by group H01F17/00 · CPC title

• H01F27/00

  Details of transformers or inductances, in general · CPC title