Laminated transformer and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-12080464-B2
Application number	US-201916719709-A
Country	US
Kind code	B2
Filing date	Dec 18, 2019
Priority date	Dec 29, 2018
Publication date	Sep 3, 2024
Grant date	Sep 3, 2024

Abstract

A laminated transformer can include: a plurality of magnetic layers; a plurality of coil layers including a primary coil having a first type of coil layer, and a secondary coil having a second type of coil layer, where each coil layer is laminated between a pair of the plurality of magnetic layers; and a plurality of non-magnetic layers, where a first of the plurality of non-magnetic layers is disposed between an adjacent pair of the coil layers in order to increase a coupling coefficient between the primary and secondary coils.

First claim

What is claimed is:

1. A laminated transformer, comprising:
a) a first magnetic layer and a second magnetic layer;
b) a plurality of winding layers, each winding layer comprising a magnetic material body and a coil layer cladded by the magnetic material body, wherein the plurality of winding layers comprise a primary winding having a first type of winding layers, and a secondary winding having a second type of winding layers, wherein the plurality of winding layers is laminated in sequence between the first magnetic layer and the second magnetic layer, wherein the magnetic material body and the coil layer of each winding layer have a same thickness; and
c) a plurality of non-magnetic layers, wherein a first of the plurality of non-magnetic layers is disposed between adjacent layers of one of the first type of winding layers and one of the second type of winding layers, in order to increase a coupling coefficient between the primary and secondary windings, and wherein each non-magnetic layer and each winding layer fully overlap in a lamination direction.

2. The transformer of claim 1 , wherein a second of the plurality of non-magnetic layers is disposed between two adjacent layers of the primary winding.

3. The transformer of claim 1 , wherein a second of the plurality of non-magnetic layers is disposed between two adjacent layers of the secondary winding.

4. The transformer of claim 1 , wherein layers of the primary winding are disposed to be adjacent in sequence, and layers of the secondary winding are disposed to be adjacent in sequence.

5. The transformer of claim 1 , wherein each of the plurality of winding layers is spirally in a direction perpendicular to the lamination direction of the laminated transformer.

6. The transformer of claim 1 , wherein a thickness of each of the plurality of non-magnetic layers is greater than a thickness of the winding layer.

7. The transformer of claim 1 , wherein each of the plurality of non-magnetic layers is configured as a ceramic layer.

8. The transformer of claim 1 , further comprising a first connecting body for connecting adjacent two layers of the primary winding, and a second connecting body for connecting adjacent two layers of the secondary winding.

9. The transformer of claim 8 , wherein the connecting body comprises a conductive material structure.

10. The transformer of claim 8 , wherein the connecting body penetrates the non-magnetic layer to connect to adjacent two layers of the first type of winding layer, or adjacent two layers of the second type of winding layer.

Assignees

• Silergy Semiconductor Technology Hangzhou Ltd

Inventors

• Dai Ke
• Wei Jian
• Yan Jiajia

Classifications

• H01F2027/2809

  on stacked layers · CPC title

• H01F27/323

  Insulation between winding turns, between winding layers · CPC title

• H01F27/24

  Magnetic cores · CPC title

• H01F27/2804 Primary

  Printed windings · CPC title

• H01F41/046

  structurally combined with ferromagnetic material · CPC title