Magnetic component and magnetic core of the same

Patent metadata

Field	Value
Publication number	US-2017194086-A1
Application number	US-201715464326-A
Country	US
Kind code	A1
Filing date	Mar 20, 2017
Priority date	Apr 10, 2015
Publication date	Jul 6, 2017
Grant date	—

Abstract

A magnetic core is provided. The magnetic core includes a plurality of magnetic core units each having at least one non-shared magnetic core part that is not shared with the neighboring magnetic core unit, wherein a reluctance of the shared magnetic core part is smaller than the reluctance of a non-shared magnetic core part of the magnetic core units, and directions of a direct current magnetic flux in the shared magnetic core part of the neighboring two magnetic core units are opposite.

First claim

What is claimed is:

1 . A magnetic core comprising:
a plurality of magnetic core units each having at least one shared magnetic core part that is shared with a neighboring magnetic core unit and at least one non-shared magnetic core part that is not shared with the neighboring magnetic core unit, wherein a reluctance of the shared magnetic core part is smaller than the reluctance of a non-shared magnetic core part of the magnetic core units, and directions of a direct current magnetic flux in the shared magnetic core part of the neighboring two magnetic core units are opposite.

2 . The magnetic core of claim 1 , wherein the shared magnetic core part comprises a common magnetic pillar, and the non-shared magnetic core part comprises a first magnetic pillar and a second magnetic pillar, and the first magnetic pillar and the second magnetic pillar are perpendicular to the common magnetic pillar.

3 . The magnetic core of claim 2 , wherein the first magnetic pillar or the second magnetic pillar comprises at least one magnetic section that has a permeability within a range of 1˜50.

4 . The magnetic core of claim 3 , wherein the magnetic section is one or more air gaps.

5 . The magnetic core of claim 4 , wherein the magnetic section comprises a plurality of air gaps, which are distributed on the same magnetic pillar or distributed on different magnetic pillars individually.

6 . The magnetic core of claim 3 , wherein in the first magnetic pillar or the second magnetic pillar, other parts thereof except the magnetic section are manufactured by using material having the same permeability as the common magnetic pillar.

7 . The magnetic core of clam 2 , wherein the first magnetic pillar and the second magnetic pillar have a first permeability, the common magnetic pillar has a second permeability, and the second permeability is larger than the first permeability.

8 . The magnetic core of claim 1 , wherein each of the magnetic core units comprises at least one magnetic pillar, and the shared magnetic core part and the non-shared magnetic core part are disposed on different positions of the same magnetic pillar.

9 . The magnetic core of claim 1 , wherein each of the magnetic core units comprises at least two magnetic pillars, and the number of magnetic pillars that the shared magnetic core part is disposed is larger than or equal to 2.

10 . The magnetic core of claim 3 , wherein the magnetic core units further comprise a magnetic core top cover and a magnetic core base, wherein the magnetic core top cover is disposed above the magnetic core base to form a geometrical structure, wherein the magnetic core top cover forms the first magnetic pillar and the second magnetic pillar, and the magnetic section is disposed at the magnetic core top cover.

11 . The magnetic core of claim 1 , wherein the magnetic core is an integrated inductor magnetic core.

12 . A magnetic component, comprising:
a magnetic core as described in claim 1 ; and a plurality of windings, each disposed to be correspondingly wound at the non-shared magnetic core part of the magnetic core unit.

13 . The magnetic component of claim 12 , wherein the non-shared magnetic core part comprises a first magnetic pillar and a second magnetic pillar, and the first magnetic pillar and the second magnetic pillar are perpendicular to the common magnetic pillar, and the first magnetic pillar or the second magnetic pillar comprises at least one magnetic section that has a permeability within a range of 1˜50.

14 . The magnetic component of claim 13 , wherein each of the plurality of windings is disposed to be correspondingly wound at the one of the magnetic pillars that the magnetic section is disposed.

15 . The magnetic component of claim 14 , wherein a coupling coefficient between the windings of two of the neighboring magnetic cores is smaller than 0.15.

16 . The magnetic component of claim 13 , wherein each of the plurality of windings is disposed to be correspondingly wound at the other magnetic pillar which is opposite to the magnetic pillar that the magnetic section is disposed.

17 . The magnetic component of claim 13 , wherein the magnetic core comprises an I-shaped magnetic core top cover and a magnetic core base, wherein the magnetic core base is formed by combing at least one E-shaped magnetic core and/or at least one U-shaped magnetic core, and the magnetic component is disposed at the magnetic core top cover, wherein the plurality of windings are wound at a connection part of the E-shaped magnetic core, the connection part of the U-shaped magnetic core or the magnetic core top cover.

18 . The magnetic component of claim 12 , wherein the magnetic core comprises a first magnetic core unit and a second magnetic core unit disposed side by side, each of the first and the second magnetic core units comprises a common magnetic pillar, a first magnetic pillar and a second magnetic pillar perpendicular to the common magnetic pillar, and a third magnetic pillar parallel to the common magnetic pillar, wherein the third magnetic pillar comprises one or more air gaps and the windings are wound at the third magnetic pillar of each of the magnetic core units.

19 . The magnetic component of claim 13 , wherein the windings are flat wires, wherein a cross-sectional surface of the flat wires is rectangular, a width of the flat wires is w, and a distance s 1 between the flat wires and the magnetic pillar that the magnetic component is disposed satisfies:
s 1> w/ 5.

20 . The magnetic component of claim 12 , wherein the windings are flat wires with grooves, and the grooves are U-shaped or arc shape, a width of the flat wires is w, and the depth s 2 of the grooves satisfies:
s 2> w/ 5,
wherein the width of the grooves is smaller than the width of the flat wires.

21 . The magnetic component of claim 12 , wherein the windings are formed by bending straight flat wires, and apertures are formed on the straight flat wires to decrease a deformation amount generated by bending the straight flat wires.

22 . The magnetic component of claim 12 , wherein the magnetic component is an integrated inductor disposed at a multi-phase paralleled input terminal or a multi-phase paralleled output terminal of a power converter.

23 . The magnetic component of claim 22 , wherein the windings of the integrated inductor has the same phase DC current and the predetermined phase difference AC current.

Assignees

• Delta Electronics Inc

Inventors

• Zhou Jin-Ping
• Wu Rui
• Zeng Jian-Hong
• Zhang Yu
• Zhou Min

Classifications

• H01F27/2823 Primary

  Wires (H01F27/2866 takes precedence) · CPC title

• H01F30/12

  Two-phase, three-phase or polyphase transformers · CPC title

• H01F27/24 Primary

  Magnetic cores · CPC title

• H01F37/00

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

• H01F27/006

  with special arrangement or spacing of turns of the winding(s), e.g. to produce desired self-resonance · CPC title