# US 10,312,012 B2 · Transformer and power supply device including the same

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- Number: US 10,312,012 B2
- Document ID: US10312012B2
- Status: Granted
- Kind: B2
- Application number: 14/329,258
- Filed: 2014-07-11
- Published: 2015-03-05
- Granted: 2019-06-04
- Earliest claimed: 2013-08-29
- Assignees: Solum Co., Ltd.
- Applicants: Samsung Electro-Mechanics Co., Ltd.
- Inventors: Jae Gen Eom; Young Seung Noh; Heung Gyoon Choi; Geun Young Park; Sung Yun Han; Seh Hoon Jang; Nak Jun Jeong; Young Min Lee; Jong Woo Kim; Tae Won Heo
- Web page: https://patentgrep.com/patent/US10312012B2

## CPC

- H01F 27/24: Magnetic cores
- H01F 27/02: Casings
- H01F 27/06: Mounting, supporting, or suspending transformers, reactors, or choke coils {not being of the signal type}
- H01F 27/2804: {Printed windings}
- H01F 27/2823: {Wires (H01F27/2866 takes precedence)}
- H01F 27/2828: {Construction of conductive connections, of leads}
- H01F 27/2847: {Sheets; Strips (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 27/32: Insulating of coils, windings, or parts thereof
- H01F 27/323: {Insulation between winding turns, between winding layers}
- H01F 27/324: {Insulation between coil and core, between different winding sections, around the coil; Other insulation structures}
- H01F 27/327: {Encapsulating or impregnating (encapsulating coil and core H01F27/022)}
- H01F 27/065: {Mounting on printed circuit boards}
- H01F 27/2809: {on stacked layers}
- H01F 27/2819: {Planar transformers with printed windings, e.g. surrounded by two cores and to be mounted on printed circuit}
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

A transformer includes a magnetic core, a first coil unit and a second coil unit. The first coil unit is disposed within the magnetic core and includes a laminated board having layers laminated therein and conductive patterns. Respective ones of the conductive patterns are disposed on the laminated layers. The second coil unit includes a conductive wire spaced apart from the conductive patterns of the laminated board by an insulating distance. The conductive wire includes a triple-insulated wire surrounded by three sheets of insulating paper to maintain the insulating distance from the conductive patterns.

## Claims

### Claim 1

A transformer, comprising:
a magnetic core;
a first coil unit disposed within the magnetic core and including a laminated board having layers laminated therein and conductive patterns for forming a primary coil, respective ones of the conductive patterns being disposed on the laminated layers; and
a second coil unit including a conductive wire for forming a secondary coil spaced apart from the conductive patterns of the laminated board by an insulating distance,
wherein the laminated board includes a first layer on which a conductive pattern is disposed, a second layer on which a shielding pattern is disposed, and a third layer on which a Vcc pattern for forming an induction current is disposed,
wherein the conductive pattern, the shielding pattern, and the Vcc pattern of the laminated board are disposed around a through hole allowing a middle leg of the magnetic core to be inserted thereinto,
wherein a maximum width of an edge of the shielding pattern is greater than a maximum width of an edge of the Vcc pattern, and
wherein the first coil unit comprises a connector to electrically connect an external board and a stoppage protrusion,
wherein the stoppage protrusion is disposed between a side wall of the magnetic core and the connector, disposed to correspond to the side wall of the magnetic core, and prevents insertion of the connector in a direction of the middle leg.

### Claim 2 (depends on 1)

The transformer of claim 1, wherein a thickness of the triple-insulated wire is less than a thickness of the laminated board.

### Claim 3 (depends on 1)

The transformer of claim 1, wherein a distance from the conductive wire of the second coil unit to a conductive pattern of a layer directly adjacent to the conductive wire is less than 0.4 mm.

### Claim 4 (depends on 1)

The transformer of claim 1, further comprising a spacer disposed between an inner surface of the magnetic core and the first coil unit, the spacer allowing the second coil unit to be in contact with the first coil unit and another portion of the inner surface of the magnetic core.

### Claim 5 (depends on 4)

The transformer of claim 4, wherein the spacer includes a buffering material formed of rubber.

### Claim 6 (depends on 4)

The transformer of claim 4, wherein the spacer includes a conductive material.

### Claim 7 (depends on 1)

The transformer of claim 1, wherein an area of the shielding pattern is greater than an area of the Vcc pattern.

### Claim 8 (depends on 1)

The transformer of claim 1, wherein the third layer is disposed to be adjacent to the second coil unit.

### Claim 9 (depends on 1)

The transformer of claim 1, wherein the third layer is disposed above or below the shielding pattern in a lamination direction.

### Claim 10 (depends on 1)

The transformer of claim 1, wherein the third layer is disposed above or below the conductive pattern in a lamination direction.

### Claim 11 (depends on 1)

The transformer of claim 1, wherein the third layer is disposed between the shielding pattern and the conductive pattern.

### Claim 12 (depends on 1)

A power supply device, comprising the transformer according to claim 1.