Magnetic apparatus, and voltage converter including the same

Patent metadata

Field	Value
Publication number	US-12488929-B2
Application number	US-202018023104-A
Country	US
Kind code	B2
Filing date	Aug 25, 2020
Priority date	Aug 25, 2020
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

The present disclosure relates to a magnetic apparatus, and a voltage converter including the same. The magnetic apparatus comprises: a first magnetic core (1), including a first planar body (11); a second magnetic core (2), including a second planar body (21); and a third magnetic core (3), including a third planar body (31). The first, second, and third magnetic core (3) are sequentially stacked. The magnetic apparatus further comprises: a first column (101) for a transformer, located between and basically perpendicular to the first planar body (11) and the second planar body (21); at least two second columns (102) for at least two inductors, located between and basically perpendicular to the second planar body (21) and the third planar body (31).

First claim

The invention claimed is:

1 . A magnetic apparatus, comprising:
a first magnetic core, including a first planar body; a second magnetic core, including a second planar body; and a third magnetic core, including a third planar body, wherein the first magnetic core, the second magnetic core, and third magnetic core are sequentially stacked, the first magnetic core further comprises a first column for a transformer, the first column being located between and basically perpendicular to the first planar body and the second planar body, the third magnetic core further comprises: a second column, a third column, and a fourth column, each of the second column, third column, and the fourth column being located between and basically perpendicular to the second planar body and the third planar body, a first inductor coil winds on the second column, a second inductor coil winds on the fourth column, the third column is located between the second column and the fourth column, the second, third, and fourth columns are located on the third planar body, and sequentially along a direction in parallel with the third planar body, the third column of the third magnetic core contacts the second planar body of the second magnetic core, and a first gap is located between the second column of the third magnetic core and the second planar body of the second magnetic core, wherein in a plane in parallel with the third planar body, a cross-sectional area of the third column is larger than a cross-sectional area of the second column.

2 . The magnetic apparatus of claim 1 , wherein
the first column is located basically on a center of the first planar body; and the first magnetic core further comprises: a fifth column, located basically on an edge position of the first planar body and in parallel with the first column.

3 . The magnetic apparatus of claim 2 , wherein a magnetic path of the transformer is configured to go through the first column, the second planar body, the fifth column, and the first planar body.

4 . The magnetic apparatus of claim 1 , wherein the first magnetic core is an E type core.

5 . The magnetic apparatus of claim 1 , wherein in a sectional plane perpendicular to the third planar body, the third magnetic core has a shape comprising a plurality of “T” shaped structures connected sequentially.

6 . The magnetic apparatus of claim 1 , wherein with regard to a direction in parallel with the third planar body, an outer side surface of the coil of the at least two inductors is exposed.

7 . The magnetic apparatus of claim 1 , wherein
a second gap is located between the fourth column of the third magnetic core and the second planar body of the second magnetic core.

8 . The magnetic apparatus of claim 1 , wherein the cross-sectional area of the third column is larger than or equal to two times of the cross-sectional area of the second column.

9 . The magnetic apparatus of claim 1 , wherein a magnetic path of an inductor of the at least two inductors is configured to go through the second column, the second planar body, the third column, and the third planar body.

10 . The magnetic apparatus of claim 9 , wherein two magnetic paths of two inductors adjacent to the third column are configured to go through the third column along a same direction.

11 . A magnetic apparatus, comprising:
a first magnetic core, including a first planar body; a second magnetic core, including a second planar body; and a third magnetic core, including a third planar body, wherein the first magnetic core, the second magnetic core, and third magnetic core are sequentially stacked, the first magnetic core further comprises a first column for a transformer, the first column being located between and basically perpendicular to the first planar body and the second planar body, the third magnetic core further comprises: a second column, a third column, and a fourth column, each of the second column, third column, and the fourth column being located between and basically perpendicular to the second planar body and the third planar body, a first inductor coil winds on the second column, a second inductor coil winds on the fourth column, the third column is located between the second column and the fourth column, the second, third, and fourth columns are located on the third planar body, and sequentially along a direction in parallel with the third planar body, the third column of the third magnetic core contacts the second planar body of the second magnetic core, a first gap is located between the second column of the third magnetic core and the second planar body of the second magnetic core, wherein in a plane in parallel with the third planar body, a cross-sectional area of the third column is larger than a cross-sectional area of the second column, and the second magnetic core is an I type core.

12 . A voltage converter, comprising:
a switching part, switching an input voltage (Vin) of the voltage converter; a transformer, transforming an output of the switching part; and a rectifying part, rectifying an output of the transformer to generate an output voltage (Vout) of the voltage converter, wherein a magnetic part of the transformer and a magnetic part of an inductor of the rectifying part are provided by the magnetic apparatus of claim 1 .

13 . The voltage converter of claim 12 , wherein the voltage converter comprises a current-doubler-rectifier (CDR) converter.

Assignees

• Ericsson Telefon Ab L M

Inventors

• Tian Jiashen
• Xiao Huajuan
• Li Donghao
• Chen Biao

Classifications

• H02M3/33573

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

• H01F2027/408

  Association with diode or rectifier · CPC title

• H02M1/0064

  Magnetic structures combining different functions, e.g. storage, filtering or transformation · CPC title

• H01F27/40

  Structural association with built-in electric component, e.g. fuse · CPC title

• H01F27/38

  Auxiliary core members; Auxiliary coils or windings · CPC title