# US 12,224,110 B2 · Transformer

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- Number: US 12,224,110 B2
- Document ID: US12224110B2
- Status: Granted
- Kind: B2
- Application number: 17/402,119
- Filed: 2021-08-13
- Published: 2022-10-20
- Granted: 2025-02-11
- Earliest claimed: 2021-04-16
- Assignees: Delta Electronics, Inc.
- Applicants: Delta Electronics, Inc.
- Inventors: Ching-Hsien Teng; Chun-Ching Yen
- Web page: https://patentgrep.com/patent/US12224110B2

## CPC

- H01F 27/346: {Preventing or reducing leakage fields (using magnetic shields H01F27/36; using auxiliary windings H01F27/38)}
- H01F 27/24: Magnetic cores
- H01F 27/2823: {Wires (H01F27/2866 takes precedence)}
- H01F 27/2885: {with shields or electrodes (shields or electrodes for pancake coils H01F27/2871; construction of electric or magnetic shields or screens H01F27/36)}
- H01F 27/325: {Coil bobbins (formers for coils in general H01F5/02)}
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

A transformer is provided, including a core, a primary conductor, a magnetic member, and a secondary conductor. The core includes a central pillar and at least one lateral pillar. An accommodating space is formed between the central pillar and the lateral pillar. The primary conductor, the magnetic member, and the secondary conductor are disposed in the accommodating space. The primary conductor surrounds the central pillar. The magnetic member surrounds the primary conductor, and the secondary conductor surrounds the magnetic member. The magnetic member is disposed between the primary conductor and the secondary conductor, and is flexible.

## Claims

### Claim 1

A transformer, comprising:
a core, comprising a central pillar and at least one lateral pillar, wherein an accommodating space is formed between the central pillar and the lateral pillar;
a primary conductor, disposed in the accommodating space and surrounding the central pillar;
a magnetic member, disposed in the accommodating space and surrounding the primary conductor; and
a secondary conductor, disposed in the accommodating space and surrounding the magnetic member, wherein the magnetic member is disposed between the primary conductor and the secondary conductor, and the magnetic member is flexible, wherein the magnetic member comprises a magnetic layer and an adhesive layer, the magnetic layer is disposed between the primary conductor and the adhesive layer, the magnetic layer is attached to the adhesive layer, and the adhesive layer is only adhesive on a surface facing the magnetic layer.

### Claim 2 (depends on 1)

The transformer as claimed in claim 1, wherein the transformer further comprises a winding frame, and the winding frame comprises:
a tube portion;
an upper extending portion, connected to an end of the tube portion and protruding from an outer surface of the tube portion; and
a lower extending portion, connected to an opposite end of the tube portion and protruding from the outer surface of the tube portion, wherein the primary conductor surrounds the outer surface of the tube portion, and the primary conductor, the magnetic member, and the secondary conductor are disposed between the upper extending portion and the lower extending portion.

### Claim 3 (depends on 2)

The transformer as claimed in claim 2, wherein the magnetic member is in contact with the upper extending portion and the lower extending portion.

### Claim 4 (depends on 2)

The transformer as claimed in claim 2, wherein the central pillar passes through the tube portion, and the upper extending portion is disposed between the central pillar and the lateral pillar.

### Claim 5 (depends on 4)

The transformer as claimed in claim 4, wherein the magnetic member further comprises an additional adhesive layer, the magnetic layer is disposed between the adhesive layer and the additional adhesive layer, and the magnetic layer is attached to the additional adhesive layer.

### Claim 6 (depends on 5)

The transformer as claimed in claim 5, wherein the additional adhesive layer is only adhesive on the surface facing the magnetic layer.

### Claim 7 (depends on 5)

The transformer as claimed in claim 5, wherein the additional adhesive layer is adhesive on the surface facing the magnetic layer and a surface facing the primary conductor.

### Claim 8 (depends on 1)

The transformer as claimed in claim 1, wherein the magnetic member has a strip-shaped structure.

### Claim 9 (depends on 1)

The transformer as claimed in claim 1, wherein the transformer further comprises an additional magnetic member disposed between the magnetic member and the secondary conductor.

### Claim 10 (depends on 9)

The transformer as claimed in claim 9, wherein the magnetic member has a strip-shaped structure, and the additional magnetic member has a strip-shaped structure.

### Claim 11 (depends on 10)

The transformer as claimed in claim 10, wherein the magnetic member and the additional magnetic member are integrally formed as one piece.

### Claim 12 (depends on 1)

The transformer as claimed in claim 1, wherein the primary conductor and the secondary conductor are arranged along a direction that is perpendicular to an extending direction of the central pillar.