High-frequency transformer

Patent metadata

Field	Value
Publication number	US-12057256-B2
Application number	US-201817425999-A
Country	US
Kind code	B2
Filing date	Aug 28, 2018
Priority date	May 30, 2018
Publication date	Aug 6, 2024
Grant date	Aug 6, 2024

Abstract

A high-frequency transformer includes: an iron core, primary windings and secondary windings, wherein the iron core is of an integrated equilateral triangle structure, the primary windings and the secondary windings are uniformly wound around three sides of the iron core, and the primary windings and/or the secondary windings are symmetrically distributed on the three sides.

First claim

What is claimed is:

1. A high-frequency transformer, comprising: an iron core, primary windings and secondary windings;
wherein the iron core is of an integrated equilateral triangle structure, wherein the integrated equilateral triangle structure avoids air gaps caused by splicing the iron core; and
the primary windings and the secondary windings are uniformly wound on three sides of the iron core, and the primary windings and/or the secondary windings are symmetrically distributed on the three sides;
wherein the secondary windings and the primary windings are concentrically wound on the iron core, and the primary windings are arranged outside the secondary windings;
wherein the primary windings wound on the three sides of the iron core are respectively configured for three-phase input; and
the secondary windings wound on the three sides of the iron core are of a series or parallel structure and are configured for single-phase output.

2. The high-frequency transformer of claim 1 , wherein three corners of the iron core are all of arc structures.

3. The high-frequency transformer of claim 1 , wherein a plurality of iron cores are provided; and
the plurality of iron cores are stacked.

4. The high-frequency transformer of claim 1 , wherein materials of the primary windings and the secondary windings are copper foil or Litz wires.

5. The high-frequency transformer of claim 1 , wherein the primary windings and/or the secondary windings being symmetrically distributed on the three sides comprises at least one of following scenarios:
the primary windings are axisymmetrically distributed with any one of angle bisectors of a triangle;
the primary windings are centrosymmetrically distributed around a center point of the triangle;
the secondary windings are axisymmetrically distributed with any one of angle bisectors of the triangle; or
the secondary windings are centrosymmetrically distributed around the center point of the triangle.

6. The high-frequency transformer of claim 2 , wherein a plurality of iron cores are provided; and
the plurality of iron cores are stacked.

7. The high-frequency transformer of claim 2 , wherein materials of the primary windings and the secondary windings are copper foil or Litz wires.

8. The high-frequency transformer of claim 2 , wherein the primary windings and/or the secondary windings being symmetrically distributed on the three sides comprises at least one of following scenarios:
the primary windings are axisymmetrically distributed with any one of angle bisectors of a triangle;
the primary windings are centrosymmetrically distributed around a center point of the triangle;
the secondary windings are axisymmetrically distributed with any one of angle bisectors of the triangle; or
the secondary windings are centrosymmetrically distributed around the center point of the triangle.

Assignees

• Global Energy Interconnection Res Inst Co Ltd
• State Grid Corp China
• State Grid Shanghai Electric Power Co Ltd

Inventors

• Deng Zhanfeng
• Zhao Guoliang
• Ge Jun
• Qiao Guangyao
• Mo Xiaolin
• Liang Dong
• Zhou Zhe

Classifications

• H01F30/12 Primary

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

• H01F27/24

  Magnetic cores · CPC title

• H01F2027/2857

  Coil formed from wound foil conductor · CPC title

• H01F30/14

  for changing the number of phases · CPC title

• H01F27/2823 Primary

  Wires (H01F27/2866 takes precedence) · CPC title